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Copy project optimization settings from official source 

git-svn-id: https://svn.code.sf.net/p/vbam/code/trunk@28 a31d4220-a93d-0410-bf67-fe4944624d44
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DJRobX 2007-11-07 20:50:36 +00:00
parent 17ae4f9f56
commit 98a8810c9c
39 changed files with 1259 additions and 32450 deletions
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406
Gb_Apu/Blip_Buffer.cpp
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// Blip_Buffer 0.4.0. http://www.slack.net/~ant/
#include "Blip_Buffer.h"
#include <assert.h>
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details. You should have received a copy of the GNU Lesser General
Public License along with this module; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
int const buffer_extra = blip_widest_impulse_ + 2;
Blip_Buffer::Blip_Buffer()
{
factor_ = LONG_MAX;
offset_ = 0;
buffer_ = 0;
buffer_size_ = 0;
sample_rate_ = 0;
reader_accum = 0;
bass_shift = 0;
clock_rate_ = 0;
bass_freq_ = 16;
length_ = 0;
// assumptions code makes about implementation-defined features
#ifndef NDEBUG
// right shift of negative value preserves sign
buf_t_ i = -0x7FFFFFFE;
assert( (i >> 1) == -0x3FFFFFFF );
// casting to short truncates to 16 bits and sign-extends
i = 0x18000;
assert( (short) i == -0x8000 );
#endif
}
Blip_Buffer::~Blip_Buffer()
{
free( buffer_ );
}
void Blip_Buffer::clear( int entire_buffer )
{
offset_ = 0;
reader_accum = 0;
if ( buffer_ )
{
long count = (entire_buffer ? buffer_size_ : samples_avail());
memset( buffer_, 0, (count + buffer_extra) * sizeof (buf_t_) );
}
}
Blip_Buffer::blargg_err_t Blip_Buffer::set_sample_rate( long new_rate, int msec )
{
// start with maximum length that resampled time can represent
long new_size = (ULONG_MAX >> BLIP_BUFFER_ACCURACY) - buffer_extra - 64;
if ( msec != blip_max_length )
{
long s = (new_rate * (msec + 1) + 999) / 1000;
if ( s < new_size )
new_size = s;
else
assert( 0 ); // fails if requested buffer length exceeds limit
}
if ( buffer_size_ != new_size )
{
void* p = realloc( buffer_, (new_size + buffer_extra) * sizeof *buffer_ );
if ( !p )
return "Out of memory";
buffer_ = (buf_t_*) p;
}
buffer_size_ = new_size;
// update things based on the sample rate
sample_rate_ = new_rate;
length_ = new_size * 1000 / new_rate - 1;
if ( msec )
assert( length_ == msec ); // ensure length is same as that passed in
if ( clock_rate_ )
clock_rate( clock_rate_ );
bass_freq( bass_freq_ );
clear();
return 0; // success
}
blip_resampled_time_t Blip_Buffer::clock_rate_factor( long clock_rate ) const
{
double ratio = (double) sample_rate_ / clock_rate;
long factor = (long) floor( ratio * (1L << BLIP_BUFFER_ACCURACY) + 0.5 );
assert( factor > 0 || !sample_rate_ ); // fails if clock/output ratio is too large
return (blip_resampled_time_t) factor;
}
void Blip_Buffer::bass_freq( int freq )
{
bass_freq_ = freq;
int shift = 31;
if ( freq > 0 )
{
shift = 13;
long f = (freq << 16) / sample_rate_;
while ( (f >>= 1) && --shift ) { }
}
bass_shift = shift;
}
void Blip_Buffer::end_frame( blip_time_t t )
{
offset_ += t * factor_;
assert( samples_avail() <= (long) buffer_size_ ); // time outside buffer length
}
void Blip_Buffer::remove_silence( long count )
{
assert( count <= samples_avail() ); // tried to remove more samples than available
offset_ -= (blip_resampled_time_t) count << BLIP_BUFFER_ACCURACY;
}
long Blip_Buffer::count_samples( blip_time_t t ) const
{
unsigned long last_sample = resampled_time( t ) >> BLIP_BUFFER_ACCURACY;
unsigned long first_sample = offset_ >> BLIP_BUFFER_ACCURACY;
return (long) (last_sample - first_sample);
}
blip_time_t Blip_Buffer::count_clocks( long count ) const
{
if ( count > buffer_size_ )
count = buffer_size_;
blip_resampled_time_t time = (blip_resampled_time_t) count << BLIP_BUFFER_ACCURACY;
return (blip_time_t) ((time - offset_ + factor_ - 1) / factor_);
}
void Blip_Buffer::remove_samples( long count )
{
if ( count )
{
remove_silence( count );
// copy remaining samples to beginning and clear old samples
long remain = samples_avail() + buffer_extra;
memmove( buffer_, buffer_ + count, remain * sizeof *buffer_ );
memset( buffer_ + remain, 0, count * sizeof *buffer_ );
}
}
// Blip_Synth_
Blip_Synth_::Blip_Synth_( short* p, int w ) :
impulses( p ),
width( w )
{
volume_unit_ = 0.0;
kernel_unit = 0;
buf = 0;
last_amp = 0;
delta_factor = 0;
}
static double const pi = 3.1415926535897932384626433832795029;
static void gen_sinc( float* out, int count, double oversample, double treble, double cutoff )
{
if ( cutoff >= 0.999 )
cutoff = 0.999;
if ( treble < -300.0 )
treble = -300.0;
if ( treble > 5.0 )
treble = 5.0;
double const maxh = 4096.0;
double const rolloff = pow( 10.0, 1.0 / (maxh * 20.0) * treble / (1.0 - cutoff) );
double const pow_a_n = pow( rolloff, maxh - maxh * cutoff );
double const to_angle = pi / 2 / maxh / oversample;
for ( int i = 0; i < count; i++ )
{
double angle = ((i - count) * 2 + 1) * to_angle;
double c = rolloff * cos( (maxh - 1.0) * angle ) - cos( maxh * angle );
double cos_nc_angle = cos( maxh * cutoff * angle );
double cos_nc1_angle = cos( (maxh * cutoff - 1.0) * angle );
double cos_angle = cos( angle );
c = c * pow_a_n - rolloff * cos_nc1_angle + cos_nc_angle;
double d = 1.0 + rolloff * (rolloff - cos_angle - cos_angle);
double b = 2.0 - cos_angle - cos_angle;
double a = 1.0 - cos_angle - cos_nc_angle + cos_nc1_angle;
out [i] = (float) ((a * d + c * b) / (b * d)); // a / b + c / d
}
}
void blip_eq_t::generate( float* out, int count ) const
{
// lower cutoff freq for narrow kernels with their wider transition band
// (8 points->1.49, 16 points->1.15)
double oversample = blip_res * 2.25 / count + 0.85;
double half_rate = sample_rate * 0.5;
if ( cutoff_freq )
oversample = half_rate / cutoff_freq;
double cutoff = rolloff_freq * oversample / half_rate;
gen_sinc( out, count, blip_res * oversample, treble, cutoff );
// apply (half of) hamming window
double to_fraction = pi / (count - 1);
for ( int i = count; i--; )
out [i] *= 0.54 - 0.46 * cos( i * to_fraction );
}
void Blip_Synth_::adjust_impulse()
{
// sum pairs for each phase and add error correction to end of first half
int const size = impulses_size();
for ( int p = blip_res; p-- >= blip_res / 2; )
{
int p2 = blip_res - 2 - p;
long error = kernel_unit;
for ( int i = 1; i < size; i += blip_res )
{
error -= impulses [i + p ];
error -= impulses [i + p2];
}
if ( p == p2 )
error /= 2; // phase = 0.5 impulse uses same half for both sides
impulses [size - blip_res + p] += error;
//printf( "error: %ld\n", error );
}
//for ( int i = blip_res; i--; printf( "\n" ) )
// for ( int j = 0; j < width / 2; j++ )
// printf( "%5ld,", impulses [j * blip_res + i + 1] );
}
void Blip_Synth_::treble_eq( blip_eq_t const& eq )
{
float fimpulse [blip_res / 2 * (blip_widest_impulse_ - 1) + blip_res * 2];
int const half_size = blip_res / 2 * (width - 1);
eq.generate( &fimpulse [blip_res], half_size );
int i;
// need mirror slightly past center for calculation
for ( i = blip_res; i--; )
fimpulse [blip_res + half_size + i] = fimpulse [blip_res + half_size - 1 - i];
// starts at 0
for ( i = 0; i < blip_res; i++ )
fimpulse [i] = 0.0f;
// find rescale factor
double total = 0.0;
for ( i = 0; i < half_size; i++ )
total += fimpulse [blip_res + i];
//double const base_unit = 44800.0 - 128 * 18; // allows treble up to +0 dB
//double const base_unit = 37888.0; // allows treble to +5 dB
double const base_unit = 32768.0; // necessary for blip_unscaled to work
double rescale = base_unit / 2 / total;
kernel_unit = (long) base_unit;
// integrate, first difference, rescale, convert to int
double sum = 0.0;
double next = 0.0;
int const impulses_size = this->impulses_size();
for ( i = 0; i < impulses_size; i++ )
{
impulses [i] = (short) floor( (next - sum) * rescale + 0.5 );
sum += fimpulse [i];
next += fimpulse [i + blip_res];
}
adjust_impulse();
// volume might require rescaling
double vol = volume_unit_;
if ( vol )
{
volume_unit_ = 0.0;
volume_unit( vol );
}
}
void Blip_Synth_::volume_unit( double new_unit )
{
if ( new_unit != volume_unit_ )
{
// use default eq if it hasn't been set yet
if ( !kernel_unit )
treble_eq( -8.0 );
volume_unit_ = new_unit;
double factor = new_unit * (1L << blip_sample_bits) / kernel_unit;
if ( factor > 0.0 )
{
int shift = 0;
// if unit is really small, might need to attenuate kernel
while ( factor < 2.0 )
{
shift++;
factor *= 2.0;
}
if ( shift )
{
kernel_unit >>= shift;
assert( kernel_unit > 0 ); // fails if volume unit is too low
// keep values positive to avoid round-towards-zero of sign-preserving
// right shift for negative values
long offset = 0x8000 + (1 << (shift - 1));
long offset2 = 0x8000 >> shift;
for ( int i = impulses_size(); i--; )
impulses [i] = (short) (((impulses [i] + offset) >> shift) - offset2);
adjust_impulse();
}
}
delta_factor = (int) floor( factor + 0.5 );
//printf( "delta_factor: %d, kernel_unit: %d\n", delta_factor, kernel_unit );
}
}
long Blip_Buffer::read_samples( blip_sample_t* out, long max_samples, int stereo )
{
long count = samples_avail();
if ( count > max_samples )
count = max_samples;
if ( count )
{
int const sample_shift = blip_sample_bits - 16;
int const bass_shift = this->bass_shift;
long accum = reader_accum;
buf_t_* in = buffer_;
if ( !stereo )
{
for ( long n = count; n--; )
{
long s = accum >> sample_shift;
accum -= accum >> bass_shift;
accum += *in++;
*out++ = (blip_sample_t) s;
// clamp sample
if ( (blip_sample_t) s != s )
out [-1] = (blip_sample_t) (0x7FFF - (s >> 24));
}
}
else
{
for ( long n = count; n--; )
{
long s = accum >> sample_shift;
accum -= accum >> bass_shift;
accum += *in++;
*out = (blip_sample_t) s;
out += 2;
// clamp sample
if ( (blip_sample_t) s != s )
out [-2] = (blip_sample_t) (0x7FFF - (s >> 24));
}
}
reader_accum = accum;
remove_samples( count );
}
return count;
}
void Blip_Buffer::mix_samples( blip_sample_t const* in, long count )
{
buf_t_* out = buffer_ + (offset_ >> BLIP_BUFFER_ACCURACY) + blip_widest_impulse_ / 2;
int const sample_shift = blip_sample_bits - 16;
int prev = 0;
while ( count-- )
{
long s = (long) *in++ << sample_shift;
*out += s - prev;
prev = s;
++out;
}
*out -= prev;
}

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Gb_Apu/Blip_Buffer.h
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// Band-limited sound synthesis and buffering
// Blip_Buffer 0.4.0
#ifndef BLIP_BUFFER_H
#define BLIP_BUFFER_H
// Time unit at source clock rate
typedef long blip_time_t;
// Output samples are 16-bit signed, with a range of -32768 to 32767
typedef short blip_sample_t;
enum { blip_sample_max = 32767 };
class Blip_Buffer {
public:
typedef const char* blargg_err_t;
// Set output sample rate and buffer length in milliseconds (1/1000 sec, defaults
// to 1/4 second), then clear buffer. Returns NULL on success, otherwise if there
// isn't enough memory, returns error without affecting current buffer setup.
blargg_err_t set_sample_rate( long samples_per_sec, int msec_length = 1000 / 4 );
// Set number of source time units per second
void clock_rate( long );
// End current time frame of specified duration and make its samples available
// (along with any still-unread samples) for reading with read_samples(). Begins
// a new time frame at the end of the current frame.
void end_frame( blip_time_t time );
// Read at most 'max_samples' out of buffer into 'dest', removing them from from
// the buffer. Returns number of samples actually read and removed. If stereo is
// true, increments 'dest' one extra time after writing each sample, to allow
// easy interleving of two channels into a stereo output buffer.
long read_samples( blip_sample_t* dest, long max_samples, int stereo = 0 );
// Additional optional features
// Current output sample rate
long sample_rate() const;
// Length of buffer, in milliseconds
int length() const;
// Number of source time units per second
long clock_rate() const;
// Set frequency high-pass filter frequency, where higher values reduce bass more
void bass_freq( int frequency );
// Number of samples delay from synthesis to samples read out
int output_latency() const;
// Remove all available samples and clear buffer to silence. If 'entire_buffer' is
// false, just clears out any samples waiting rather than the entire buffer.
void clear( int entire_buffer = 1 );
// Number of samples available for reading with read_samples()
long samples_avail() const;
// Remove 'count' samples from those waiting to be read
void remove_samples( long count );
// Experimental features
// Number of raw samples that can be mixed within frame of specified duration.
long count_samples( blip_time_t duration ) const;
// Mix 'count' samples from 'buf' into buffer.
void mix_samples( blip_sample_t const* buf, long count );
// Count number of clocks needed until 'count' samples will be available.
// If buffer can't even hold 'count' samples, returns number of clocks until
// buffer becomes full.
blip_time_t count_clocks( long count ) const;
// not documented yet
typedef unsigned long blip_resampled_time_t;
void remove_silence( long count );
blip_resampled_time_t resampled_duration( int t ) const { return t * factor_; }
blip_resampled_time_t resampled_time( blip_time_t t ) const { return t * factor_ + offset_; }
blip_resampled_time_t clock_rate_factor( long clock_rate ) const;
public:
Blip_Buffer();
~Blip_Buffer();
// Deprecated
typedef blip_resampled_time_t resampled_time_t;
blargg_err_t sample_rate( long r ) { return set_sample_rate( r ); }
blargg_err_t sample_rate( long r, int msec ) { return set_sample_rate( r, msec ); }
private:
// noncopyable
Blip_Buffer( const Blip_Buffer& );
Blip_Buffer& operator = ( const Blip_Buffer& );
public:
typedef long buf_t_;
unsigned long factor_;
blip_resampled_time_t offset_;
buf_t_* buffer_;
long buffer_size_;
private:
long reader_accum;
int bass_shift;
long sample_rate_;
long clock_rate_;
int bass_freq_;
int length_;
friend class Blip_Reader;
};
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
// Number of bits in resample ratio fraction. Higher values give a more accurate ratio
// but reduce maximum buffer size.
#ifndef BLIP_BUFFER_ACCURACY
#define BLIP_BUFFER_ACCURACY 16
#endif
// Number bits in phase offset. Fewer than 6 bits (64 phase offsets) results in
// noticeable broadband noise when synthesizing high frequency square waves.
// Affects size of Blip_Synth objects since they store the waveform directly.
#ifndef BLIP_PHASE_BITS
#define BLIP_PHASE_BITS 6
#endif
// Internal
typedef unsigned long blip_resampled_time_t;
int const blip_widest_impulse_ = 16;
int const blip_res = 1 << BLIP_PHASE_BITS;
class blip_eq_t;
class Blip_Synth_ {
double volume_unit_;
short* const impulses;
int const width;
long kernel_unit;
int impulses_size() const { return blip_res / 2 * width + 1; }
void adjust_impulse();
public:
Blip_Buffer* buf;
int last_amp;
int delta_factor;
Blip_Synth_( short* impulses, int width );
void treble_eq( blip_eq_t const& );
void volume_unit( double );
};
// Quality level. Start with blip_good_quality.
const int blip_med_quality = 8;
const int blip_good_quality = 12;
const int blip_high_quality = 16;
// Range specifies the greatest expected change in amplitude. Calculate it
// by finding the difference between the maximum and minimum expected
// amplitudes (max - min).
template<int quality,int range>
class Blip_Synth {
public:
// Set overall volume of waveform
void volume( double v ) { impl.volume_unit( v * (1.0 / (range < 0 ? -range : range)) ); }
// Configure low-pass filter (see notes.txt)
void treble_eq( blip_eq_t const& eq ) { impl.treble_eq( eq ); }
// Get/set Blip_Buffer used for output
Blip_Buffer* output() const { return impl.buf; }
void output( Blip_Buffer* b ) { impl.buf = b; impl.last_amp = 0; }
// Update amplitude of waveform at given time. Using this requires a separate
// Blip_Synth for each waveform.
void update( blip_time_t time, int amplitude );
// Low-level interface
// Add an amplitude transition of specified delta, optionally into specified buffer
// rather than the one set with output(). Delta can be positive or negative.
// The actual change in amplitude is delta * (volume / range)
void offset( blip_time_t, int delta, Blip_Buffer* ) const;
void offset( blip_time_t t, int delta ) const { offset( t, delta, impl.buf ); }
// Works directly in terms of fractional output samples. Contact author for more.
void offset_resampled( blip_resampled_time_t, int delta, Blip_Buffer* ) const;
// Same as offset(), except code is inlined for higher performance
void offset_inline( blip_time_t t, int delta, Blip_Buffer* buf ) const {
offset_resampled( t * buf->factor_ + buf->offset_, delta, buf );
}
void offset_inline( blip_time_t t, int delta ) const {
offset_resampled( t * impl.buf->factor_ + impl.buf->offset_, delta, impl.buf );
}
public:
Blip_Synth() : impl( impulses, quality ) { }
private:
typedef short imp_t;
imp_t impulses [blip_res * (quality / 2) + 1];
Blip_Synth_ impl;
};
// Low-pass equalization parameters
class blip_eq_t {
public:
// Logarithmic rolloff to treble dB at half sampling rate. Negative values reduce
// treble, small positive values (0 to 5.0) increase treble.
blip_eq_t( double treble_db = 0 );
// See notes.txt
blip_eq_t( double treble, long rolloff_freq, long sample_rate, long cutoff_freq = 0 );
private:
double treble;
long rolloff_freq;
long sample_rate;
long cutoff_freq;
void generate( float* out, int count ) const;
friend class Blip_Synth_;
};
int const blip_sample_bits = 30;
// Optimized inline sample reader for custom sample formats and mixing of Blip_Buffer samples
class Blip_Reader {
public:
// Begin reading samples from buffer. Returns value to pass to next() (can
// be ignored if default bass_freq is acceptable).
int begin( Blip_Buffer& );
// Current sample
long read() const { return accum >> (blip_sample_bits - 16); }
// Current raw sample in full internal resolution
long read_raw() const { return accum; }
// Advance to next sample
void next( int bass_shift = 9 ) { accum += *buf++ - (accum >> bass_shift); }
// End reading samples from buffer. The number of samples read must now be removed
// using Blip_Buffer::remove_samples().
void end( Blip_Buffer& b ) { b.reader_accum = accum; }
private:
const Blip_Buffer::buf_t_* buf;
long accum;
};
// End of public interface
#include <assert.h>
// Compatibility with older version
const long blip_unscaled = 65535;
const int blip_low_quality = blip_med_quality;
const int blip_best_quality = blip_high_quality;
#define BLIP_FWD( i ) { \
long t0 = i0 * delta + buf [fwd + i]; \
long t1 = imp [blip_res * (i + 1)] * delta + buf [fwd + 1 + i]; \
i0 = imp [blip_res * (i + 2)]; \
buf [fwd + i] = t0; \
buf [fwd + 1 + i] = t1; }
#define BLIP_REV( r ) { \
long t0 = i0 * delta + buf [rev - r]; \
long t1 = imp [blip_res * r] * delta + buf [rev + 1 - r]; \
i0 = imp [blip_res * (r - 1)]; \
buf [rev - r] = t0; \
buf [rev + 1 - r] = t1; }
template<int quality,int range>
inline void Blip_Synth<quality,range>::offset_resampled( blip_resampled_time_t time,
int delta, Blip_Buffer* blip_buf ) const
{
// Fails if time is beyond end of Blip_Buffer, due to a bug in caller code or the
// need for a longer buffer as set by set_sample_rate().
assert( (long) (time >> BLIP_BUFFER_ACCURACY) < blip_buf->buffer_size_ );
delta *= impl.delta_factor;
int phase = (int) (time >> (BLIP_BUFFER_ACCURACY - BLIP_PHASE_BITS) & (blip_res - 1));
imp_t const* imp = impulses + blip_res - phase;
long* buf = blip_buf->buffer_ + (time >> BLIP_BUFFER_ACCURACY);
long i0 = *imp;
int const fwd = (blip_widest_impulse_ - quality) / 2;
int const rev = fwd + quality - 2;
BLIP_FWD( 0 )
if ( quality > 8 ) BLIP_FWD( 2 )
if ( quality > 12 ) BLIP_FWD( 4 )
{
int const mid = quality / 2 - 1;
long t0 = i0 * delta + buf [fwd + mid - 1];
long t1 = imp [blip_res * mid] * delta + buf [fwd + mid];
imp = impulses + phase;
i0 = imp [blip_res * mid];
buf [fwd + mid - 1] = t0;
buf [fwd + mid] = t1;
}
if ( quality > 12 ) BLIP_REV( 6 )
if ( quality > 8 ) BLIP_REV( 4 )
BLIP_REV( 2 )
long t0 = i0 * delta + buf [rev];
long t1 = *imp * delta + buf [rev + 1];
buf [rev] = t0;
buf [rev + 1] = t1;
}
#undef BLIP_FWD
#undef BLIP_REV
template<int quality,int range>
void Blip_Synth<quality,range>::offset( blip_time_t t, int delta, Blip_Buffer* buf ) const
{
offset_resampled( t * buf->factor_ + buf->offset_, delta, buf );
}
template<int quality,int range>
void Blip_Synth<quality,range>::update( blip_time_t t, int amp )
{
int delta = amp - impl.last_amp;
impl.last_amp = amp;
offset_resampled( t * impl.buf->factor_ + impl.buf->offset_, delta, impl.buf );
}
inline blip_eq_t::blip_eq_t( double t ) :
treble( t ), rolloff_freq( 0 ), sample_rate( 44100 ), cutoff_freq( 0 ) { }
inline blip_eq_t::blip_eq_t( double t, long rf, long sr, long cf ) :
treble( t ), rolloff_freq( rf ), sample_rate( sr ), cutoff_freq( cf ) { }
inline int Blip_Buffer::length() const { return length_; }
inline long Blip_Buffer::samples_avail() const { return (long) (offset_ >> BLIP_BUFFER_ACCURACY); }
inline long Blip_Buffer::sample_rate() const { return sample_rate_; }
inline int Blip_Buffer::output_latency() const { return blip_widest_impulse_ / 2; }
inline long Blip_Buffer::clock_rate() const { return clock_rate_; }
inline void Blip_Buffer::clock_rate( long cps ) { factor_ = clock_rate_factor( clock_rate_ = cps ); }
inline int Blip_Reader::begin( Blip_Buffer& blip_buf )
{
buf = blip_buf.buffer_;
accum = blip_buf.reader_accum;
return blip_buf.bass_shift;
}
int const blip_max_length = 0;
int const blip_default_length = 250;
#endif

204
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@ -1,204 +0,0 @@
// Blip_Synth and Blip_Wave are waveform transition synthesizers for adding
// waveforms to a Blip_Buffer.
// Blip_Buffer 0.3.3. Copyright (C) 2003-2005 Shay Green. GNU LGPL license.
#ifndef BLIP_SYNTH_H
#define BLIP_SYNTH_H
#ifndef BLIP_BUFFER_H
#include "Blip_Buffer.h"
#endif
// Quality level. Higher levels are slower, and worse in a few cases.
// Use blip_good_quality as a starting point.
const int blip_low_quality = 1;
const int blip_med_quality = 2;
const int blip_good_quality = 3;
const int blip_high_quality = 4;
// Blip_Synth is a transition waveform synthesizer which adds band-limited
// offsets (transitions) into a Blip_Buffer. For a simpler interface, use
// Blip_Wave (below).
//
// Range specifies the greatest expected offset that will occur. For a
// waveform that goes between +amp and -amp, range should be amp * 2 (half
// that if it only goes between +amp and 0). When range is large, a higher
// accuracy scheme is used; to force this even when range is small, pass
// the negative of range (i.e. -range).
template<int quality,int range>
class Blip_Synth {
BOOST_STATIC_ASSERT( 1 <= quality && quality <= 5 );
BOOST_STATIC_ASSERT( -32768 <= range && range <= 32767 );
enum {
abs_range = (range < 0) ? -range : range,
fine_mode = (range > 512 || range < 0),
width = (quality < 5 ? quality * 4 : Blip_Buffer::widest_impulse_),
res = 1 << blip_res_bits_,
impulse_size = width / 2 * (fine_mode + 1),
base_impulses_size = width / 2 * (res / 2 + 1),
fine_bits = (fine_mode ? (abs_range <= 64 ? 2 : abs_range <= 128 ? 3 :
abs_range <= 256 ? 4 : abs_range <= 512 ? 5 : abs_range <= 1024 ? 6 :
abs_range <= 2048 ? 7 : 8) : 0)
};
blip_pair_t_ impulses [impulse_size * res * 2 + base_impulses_size];
Blip_Impulse_ impulse;
public:
Blip_Synth() { impulse.init( impulses, width, res, fine_bits ); }
// Configure low-pass filter (see notes.txt). Not optimized for real-time control
void treble_eq( const blip_eq_t& eq ) { impulse.treble_eq( eq ); }
// Set volume of a transition at amplitude 'range' by setting volume_unit
// to v / range
void volume( double v ) { impulse.volume_unit( v * (1.0 / abs_range) ); }
// Set base volume unit of transitions, where 1.0 is a full swing between the
// positive and negative extremes. Not optimized for real-time control.
void volume_unit( double unit ) { impulse.volume_unit( unit ); }
// Default Blip_Buffer used for output when none is specified for a given call
Blip_Buffer* output() const { return impulse.buf; }
void output( Blip_Buffer* b ) { impulse.buf = b; }
// Add an amplitude offset (transition) with an amplitude of delta * volume_unit
// into the specified buffer (default buffer if none specified) at the
// specified source time. Amplitude can be positive or negative. To increase
// performance by inlining code at the call site, use offset_inline().
void offset( blip_time_t, int delta, Blip_Buffer* ) const;
void offset_resampled( blip_resampled_time_t, int delta, Blip_Buffer* ) const;
void offset_resampled( blip_resampled_time_t t, int o ) const {
offset_resampled( t, o, impulse.buf );
}
void offset( blip_time_t t, int delta ) const {
offset( t, delta, impulse.buf );
}
void offset_inline( blip_time_t time, int delta, Blip_Buffer* buf ) const {
offset_resampled( time * buf->factor_ + buf->offset_, delta, buf );
}
void offset_inline( blip_time_t time, int delta ) const {
offset_inline( time, delta, impulse.buf );
}
};
// Blip_Wave is a synthesizer for adding a *single* waveform to a Blip_Buffer.
// A wave is built from a series of delays and new amplitudes. This provides a
// simpler interface than Blip_Synth.
template<int quality,int range>
class Blip_Wave {
Blip_Synth<quality,range> synth;
blip_time_t time_;
int last_amp;
public:
// Start wave at time 0 and amplitude 0
Blip_Wave() : time_( 0 ), last_amp( 0 ) { }
// See Blip_Synth for description
void volume( double v ) { synth.volume( v ); }
void volume_unit( double v ) { synth.volume_unit( v ); }
void treble_eq( const blip_eq_t& eq){ synth.treble_eq( eq ); }
Blip_Buffer* output() const { return synth.output(); }
void output( Blip_Buffer* b ) { synth.output( b ); if ( !b ) time_ = last_amp = 0; }
// Current time in frame
blip_time_t time() const { return time_; }
void time( blip_time_t t ) { time_ = t; }
// Current amplitude of wave
int amplitude() const { return last_amp; }
void amplitude( int );
// Move forward by 't' time units
void delay( blip_time_t t ) { time_ += t; }
// End time frame of specified duration. Localize time to new frame.
void end_frame( blip_time_t duration ) {
assert(( "Blip_Wave::end_frame(): Wave hadn't yet been run for entire frame",
duration <= time_ ));
time_ -= duration;
}
};
// End of public interface
template<int quality,int range>
void Blip_Wave<quality,range>::amplitude( int amp ) {
int delta = amp - last_amp;
last_amp = amp;
synth.offset_inline( time_, delta );
}
template<int quality,int range>
inline void Blip_Synth<quality,range>::offset_resampled( blip_resampled_time_t time,
int delta, Blip_Buffer* blip_buf ) const
{
typedef blip_pair_t_ pair_t;
unsigned sample_index = (time >> BLIP_BUFFER_ACCURACY) & ~1;
assert(( "Blip_Synth/Blip_wave: Went past end of buffer",
sample_index < blip_buf->buffer_size_ ));
enum { const_offset = Blip_Buffer::widest_impulse_ / 2 - width / 2 };
pair_t* buf = (pair_t*) &blip_buf->buffer_ [const_offset + sample_index];
enum { shift = BLIP_BUFFER_ACCURACY - blip_res_bits_ };
enum { mask = res * 2 - 1 };
const pair_t* imp = &impulses [((time >> shift) & mask) * impulse_size];
pair_t offset = impulse.offset * delta;
if ( !fine_bits )
{
// normal mode
for ( int n = width / 4; n; --n )
{
pair_t t0 = buf [0] - offset;
pair_t t1 = buf [1] - offset;
t0 += imp [0] * delta;
t1 += imp [1] * delta;
imp += 2;
buf [0] = t0;
buf [1] = t1;
buf += 2;
}
}
else
{
// fine mode
enum { sub_range = 1 << fine_bits };
delta += sub_range / 2;
int delta2 = (delta & (sub_range - 1)) - sub_range / 2;
delta >>= fine_bits;
for ( int n = width / 4; n; --n )
{
pair_t t0 = buf [0] - offset;
pair_t t1 = buf [1] - offset;
t0 += imp [0] * delta2;
t0 += imp [1] * delta;
t1 += imp [2] * delta2;
t1 += imp [3] * delta;
imp += 4;
buf [0] = t0;
buf [1] = t1;
buf += 2;
}
}
}
template<int quality,int range>
void Blip_Synth<quality,range>::offset( blip_time_t time, int delta, Blip_Buffer* buf ) const {
offset_resampled( time * buf->factor_ + buf->offset_, delta, buf );
}
#endif

504
Gb_Apu/COPYING
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@ -1,504 +0,0 @@
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safest to attach them to the start of each source file to most effectively
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<one line to give the library's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Ty Coon, President of Vice
That's all there is to it!

318
Gb_Apu/Gb_Apu.cpp
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@ -1,318 +0,0 @@
// Gb_Snd_Emu 0.1.4. http://www.slack.net/~ant/
#include "Gb_Apu.h"
#include <string.h>
/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details. You should have received a copy of the GNU Lesser General
Public License along with this module; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include BLARGG_SOURCE_BEGIN
int const vol_reg = 0xFF24;
int const status_reg = 0xFF26;
Gb_Apu::Gb_Apu()
{
square1.synth = &square_synth;
square2.synth = &square_synth;
wave.synth = &other_synth;
noise.synth = &other_synth;
oscs [0] = &square1;
oscs [1] = &square2;
oscs [2] = &wave;
oscs [3] = &noise;
for ( int i = 0; i < osc_count; i++ )
{
Gb_Osc& osc = *oscs [i];
osc.regs = &regs [i * 5];
osc.output = NULL;
osc.outputs [0] = NULL;
osc.outputs [1] = NULL;
osc.outputs [2] = NULL;
osc.outputs [3] = NULL;
}
volume( 1.0 );
reset();
}
Gb_Apu::~Gb_Apu()
{
}
void Gb_Apu::treble_eq( const blip_eq_t& eq )
{
square_synth.treble_eq( eq );
other_synth.treble_eq( eq );
}
void Gb_Apu::osc_output( int index, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
{
require( (unsigned) index < osc_count );
require( (center && left && right) || (!center && !left && !right) );
Gb_Osc& osc = *oscs [index];
osc.outputs [1] = right;
osc.outputs [2] = left;
osc.outputs [3] = center;
osc.output = osc.outputs [osc.output_select];
}
void Gb_Apu::output( Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
{
for ( int i = 0; i < osc_count; i++ )
osc_output( i, center, left, right );
}
void Gb_Apu::update_volume()
{
// to do: doesn't handle differing left/right global volume
int data = regs [vol_reg - start_addr];
double vol = (max( data & 7, data >> 4 & 7 ) + 1) * volume_unit;
square_synth.volume( vol );
other_synth.volume( vol );
}
static unsigned char const powerup_regs [0x30] = {
0x80,0x3F,0x00,0xFF,0xBF, // square 1
0xFF,0x3F,0x00,0xFF,0xBF, // square 2
0x7F,0xFF,0x9F,0xFF,0xBF, // wave
0xFF,0xFF,0x00,0x00,0xBF, // noise
0x00, // left/right enables
0x77, // master volume
0x80, // power
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0x84,0x40,0x43,0xAA,0x2D,0x78,0x92,0x3C, // wave table
0x60,0x59,0x59,0xB0,0x34,0xB8,0x2E,0xDA
};
void Gb_Apu::reset(bool igba)
{
next_frame_time = 0;
last_time = 0;
frame_count = 0;
stereo_found = false;
square1.reset();
square2.reset();
wave.reset(gba = igba);
noise.reset();
noise.bits = 1;
wave.wave_pos = 0;
// avoid click at beginning
regs [vol_reg - start_addr] = 0x77;
update_volume();
regs [status_reg - start_addr] = 0x01; // force power
write_register( 0, status_reg, 0x00 );
}
// to do: remove
//static unsigned long abs_time;
void Gb_Apu::run_until( gb_time_t end_time )
{
require( end_time >= last_time ); // end_time must not be before previous time
if ( end_time == last_time )
return;
while ( true )
{
gb_time_t time = next_frame_time;
if ( time > end_time )
time = end_time;
// run oscillators
for ( int i = 0; i < osc_count; ++i )
{
Gb_Osc& osc = *oscs [i];
if ( osc.output )
{
int playing = false;
if ( osc.enabled && osc.volume &&
(!(osc.regs [4] & osc.len_enabled_mask) || osc.length) )
playing = -1;
if ( osc.output != osc.outputs [3] )
stereo_found = true;
switch ( i )
{
case 0: square1.run( last_time, time, playing ); break;
case 1: square2.run( last_time, time, playing ); break;
case 2: wave .run( last_time, time, playing ); break;
case 3: noise .run( last_time, time, playing ); break;
}
}
}
last_time = time;
if ( time == end_time )
break;
next_frame_time += 4194304 / 256; // 256 Hz
// 256 Hz actions
square1.clock_length();
square2.clock_length();
wave.clock_length();
noise.clock_length();
frame_count = (frame_count + 1) & 3;
if ( frame_count == 0 )
{
// 64 Hz actions
square1.clock_envelope();
square2.clock_envelope();
noise.clock_envelope();
}
if ( frame_count & 1 )
square1.clock_sweep(); // 128 Hz action
}
}
bool Gb_Apu::end_frame( gb_time_t end_time )
{
if ( end_time > last_time )
run_until( end_time );
//abs_time += end_time;
assert( next_frame_time >= end_time );
next_frame_time -= end_time;
assert( last_time >= end_time );
last_time -= end_time;
bool result = stereo_found;
stereo_found = false;
return result;
}
void Gb_Apu::write_register( gb_time_t time, gb_addr_t addr, int data )
{
require( (unsigned) data < 0x100 );
int reg = addr - start_addr;
if ( (unsigned) reg >= register_count )
return;
run_until( time );
int old_reg = regs [reg];
regs [reg] = data;
if ( addr < vol_reg )
{
write_osc( reg / 5, reg, data );
}
else if ( addr == vol_reg && data != old_reg ) // global volume
{
// return all oscs to 0
for ( int i = 0; i < osc_count; i++ )
{
Gb_Osc& osc = *oscs [i];
int amp = osc.last_amp;
osc.last_amp = 0;
if ( amp && osc.enabled && osc.output )
other_synth.offset( time, -amp, osc.output );
}
if ( wave.outputs [3] )
other_synth.offset( time, 30, wave.outputs [3] );
update_volume();
if ( wave.outputs [3] )
other_synth.offset( time, -30, wave.outputs [3] );
// oscs will update with new amplitude when next run
}
else if ( addr == 0xFF25 || addr == status_reg )
{
int mask = (regs [status_reg - start_addr] & 0x80) ? ~0 : 0;
int flags = regs [0xFF25 - start_addr] & mask;
// left/right assignments
for ( int i = 0; i < osc_count; i++ )
{
Gb_Osc& osc = *oscs [i];
osc.enabled &= mask;
int bits = flags >> i;
Blip_Buffer* old_output = osc.output;
osc.output_select = (bits >> 3 & 2) | (bits & 1);
osc.output = osc.outputs [osc.output_select];
if ( osc.output != old_output )
{
int amp = osc.last_amp;
osc.last_amp = 0;
if ( amp && old_output )
other_synth.offset( time, -amp, old_output );
}
}
if ( addr == status_reg && data != old_reg )
{
if ( !(data & 0x80) )
{
for ( int i = 0; i < (int) sizeof powerup_regs; i++ )
{
if ( i != status_reg - start_addr )
write_register( time, i + start_addr, powerup_regs [i] );
}
}
else
{
//dprintf( "APU powered on\n" );
}
}
}
else if ( addr >= 0xFF30 )
{
int bank;
if (gba) bank = (wave.wave_bank ^ 0x20);
else bank = 0;
int index = (addr & 0x0F) * 2 + bank;
wave.wave [index] = data >> 4;
wave.wave [index + 1] = data & 0x0F;
}
}
int Gb_Apu::read_register( gb_time_t time, gb_addr_t addr )
{
run_until( time );
int index = addr - start_addr;
require( (unsigned) index < register_count );
int data = regs [index];
if ( addr == status_reg )
{
data = (data & 0x80) | 0x70;
for ( int i = 0; i < osc_count; i++ )
{
const Gb_Osc& osc = *oscs [i];
if ( osc.enabled && (osc.length || !(osc.regs [4] & osc.len_enabled_mask)) )
data |= 1 << i;
}
} else if ( gba && addr >= 0xff30 ) {
int bank = (wave.wave_bank ^ 0x20);
int index = (addr & 0x0f) * 2;
data = wave.wave [bank + index] << 4;
data |= wave.wave [bank + index + 1];
}
return data;
}

99
Gb_Apu/Gb_Apu.h
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// Nintendo Game Boy PAPU sound chip emulator
// Gb_Snd_Emu 0.1.4
#ifndef GB_APU_H
#define GB_APU_H
typedef long gb_time_t; // clock cycle count
typedef unsigned gb_addr_t; // 16-bit address
#include "Gb_Oscs.h"
class Gb_Apu {
public:
// Set overall volume of all oscillators, where 1.0 is full volume
void volume( double );
// Set treble equalization
void treble_eq( const blip_eq_t& );
// Outputs can be assigned to a single buffer for mono output, or to three
// buffers for stereo output (using Stereo_Buffer to do the mixing).
// Assign all oscillator outputs to specified buffer(s). If buffer
// is NULL, silences all oscillators.
void output( Blip_Buffer* mono );
void output( Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right );
// Assign single oscillator output to buffer(s). Valid indicies are 0 to 3,
// which refer to Square 1, Square 2, Wave, and Noise. If buffer is NULL,
// silences oscillator.
enum { osc_count = 4 };
void osc_output( int index, Blip_Buffer* mono );
void osc_output( int index, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right );
// Reset oscillators and internal state
void reset(bool gba = false);
// Reads and writes at addr must satisfy start_addr <= addr <= end_addr
enum { start_addr = 0xFF10 };
enum { end_addr = 0xFF3f };
enum { register_count = end_addr - start_addr + 1 };
// Write 'data' to address at specified time
void write_register( gb_time_t, gb_addr_t, int data );
// Read from address at specified time
int read_register( gb_time_t, gb_addr_t );
// Run all oscillators up to specified time, end current time frame, then
// start a new frame at time 0. Returns true if any oscillators added
// sound to one of the left/right buffers, false if they only added
// to the center buffer.
bool end_frame( gb_time_t );
public:
Gb_Apu();
~Gb_Apu();
private:
// noncopyable
Gb_Apu( const Gb_Apu& );
Gb_Apu& operator = ( const Gb_Apu& );
Gb_Osc* oscs [osc_count];
gb_time_t next_frame_time;
gb_time_t last_time;
double volume_unit;
int frame_count;
bool stereo_found;
Gb_Square square1;
Gb_Square square2;
Gb_Wave wave;
Gb_Noise noise;
BOOST::uint8_t regs [register_count];
Gb_Square::Synth square_synth; // used by squares
Gb_Wave::Synth other_synth; // used by wave and noise
bool gba; // enable GBA extensions to wave channel
void update_volume();
void run_until( gb_time_t );
void write_osc( int index, int reg, int data );
};
inline void Gb_Apu::output( Blip_Buffer* b ) { output( b, b, b ); }
inline void Gb_Apu::osc_output( int i, Blip_Buffer* b ) { osc_output( i, b, b, b ); }
inline void Gb_Apu::volume( double vol )
{
volume_unit = 0.60 / osc_count / 15 /*steps*/ / 2 /*?*/ / 8 /*master vol range*/ * vol;
update_volume();
}
#endif

360
Gb_Apu/Gb_Oscs.cpp
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@ -1,360 +0,0 @@
// Gb_Snd_Emu 0.1.4. http://www.slack.net/~ant/
#include "Gb_Apu.h"
#include <string.h>
/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details. You should have received a copy of the GNU Lesser General
Public License along with this module; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include BLARGG_SOURCE_BEGIN
// Gb_Osc
void Gb_Osc::reset()
{
delay = 0;
last_amp = 0;
length = 0;
output_select = 3;
output = outputs [output_select];
}
void Gb_Osc::clock_length()
{
if ( (regs [4] & len_enabled_mask) && length )
length--;
}
// Gb_Env
void Gb_Env::clock_envelope()
{
if ( env_delay && !--env_delay )
{
env_delay = regs [2] & 7;
int v = volume - 1 + (regs [2] >> 2 & 2);
if ( (unsigned) v < 15 )
volume = v;
}
}
bool Gb_Env::write_register( int reg, int data )
{
switch ( reg )
{
case 1:
length = 64 - (regs [1] & 0x3f);
break;
case 2:
if ( !(data >> 4) )
enabled = false;
break;
case 4:
if ( data & trigger )
{
env_delay = regs [2] & 7;
volume = regs [2] >> 4;
enabled = true;
if ( length == 0 )
length = 64;
return true;
}
}
return false;
}
// Gb_Square
void Gb_Square::reset()
{
phase = 0;
sweep_freq = 0;
sweep_delay = 0;
Gb_Env::reset();
}
void Gb_Square::clock_sweep()
{
int sweep_period = (regs [0] & period_mask) >> 4;
if ( sweep_period && sweep_delay && !--sweep_delay )
{
sweep_delay = sweep_period;
regs [3] = sweep_freq & 0xFF;
regs [4] = (regs [4] & ~0x07) | (sweep_freq >> 8 & 0x07);
int offset = sweep_freq >> (regs [0] & shift_mask);
if ( regs [0] & 0x08 )
offset = -offset;
sweep_freq += offset;
if ( sweep_freq < 0 )
{
sweep_freq = 0;
}
else if ( sweep_freq >= 2048 )
{
sweep_delay = 0; // don't modify channel frequency any further
sweep_freq = 2048; // silence sound immediately
}
}
}
void Gb_Square::run( gb_time_t time, gb_time_t end_time, int playing )
{
if ( sweep_freq == 2048 )
playing = false;
static unsigned char const table [4] = { 1, 2, 4, 6 };
int const duty = table [regs [1] >> 6];
int amp = volume & playing;
if ( phase >= duty )
amp = -amp;
int frequency = this->frequency();
if ( unsigned (frequency - 1) > 2040 ) // frequency < 1 || frequency > 2041
{
// really high frequency results in DC at half volume
amp = volume >> 1;
playing = false;
}
int delta = amp - last_amp;
if ( delta )
{
last_amp = amp;
synth->offset( time, delta, output );
}
time += delay;
if ( !playing )
time = end_time;
if ( time < end_time )
{
int const period = (2048 - frequency) * 4;
Blip_Buffer* const output = this->output;
int phase = this->phase;
int delta = amp * 2;
do
{
phase = (phase + 1) & 7;
if ( phase == 0 || phase == duty )
{
delta = -delta;
synth->offset_inline( time, delta, output );
}
time += period;
}
while ( time < end_time );
this->phase = phase;
last_amp = delta >> 1;
}
delay = time - end_time;
}
// Gb_Noise
#include BLARGG_ENABLE_OPTIMIZER
void Gb_Noise::run( gb_time_t time, gb_time_t end_time, int playing )
{
int amp = volume & playing;
int tap = 13 - (regs [3] & 8);
if ( bits >> tap & 2 )
amp = -amp;
int delta = amp - last_amp;
if ( delta )
{
last_amp = amp;
synth->offset( time, delta, output );
}
time += delay;
if ( !playing )
time = end_time;
if ( time < end_time )
{
static unsigned char const table [8] = { 8, 16, 32, 48, 64, 80, 96, 112 };
int period = table [regs [3] & 7] << (regs [3] >> 4);
// keep parallel resampled time to eliminate time conversion in the loop
Blip_Buffer* const output = this->output;
const blip_resampled_time_t resampled_period =
output->resampled_duration( period );
blip_resampled_time_t resampled_time = output->resampled_time( time );
unsigned bits = this->bits;
int delta = amp * 2;
do
{
unsigned changed = (bits >> tap) + 1;
time += period;
bits <<= 1;
if ( changed & 2 )
{
delta = -delta;
bits |= 1;
synth->offset_resampled( resampled_time, delta, output );
}
resampled_time += resampled_period;
}
while ( time < end_time );
this->bits = bits;
last_amp = delta >> 1;
}
delay = time - end_time;
}
// Gb_Wave
void Gb_Wave::reset(bool gba)
{
volume_forced = 0;
wave_pos = 0;
wave_mode = gba;
wave_size = 32;
wave_bank = 0;
memset( wave, 0, sizeof wave );
Gb_Osc::reset();
}
inline void Gb_Wave::write_register( int reg, int data )
{
switch ( reg )
{
case 0:
if ( !(data & 0x80) )
enabled = false;
if (wave_mode)
{
wave_bank = (data & 0x40) >> 1;
wave_size = (data & 0x20) + 32;
}
if (wave_pos > wave_size) wave_pos %= wave_size;
break;
case 1:
length = 256 - regs [1];
break;
case 2:
volume = data >> 5 & 3;
if (wave_mode) volume_forced = data & 0x80;
if (volume_forced) volume = -1;
break;
case 4:
if ( data & trigger & regs [0] )
{
wave_pos = 0;
enabled = true;
if ( length == 0 )
length = 256;
}
}
}
void Gb_Wave::run( gb_time_t time, gb_time_t end_time, int playing )
{
int volume_shift = (volume - 1) & 7; // volume = 0 causes shift = 7
int amp = (wave_size == 32) ? wave [wave_bank + wave_pos] : wave [wave_pos];
if (volume_forced) amp = ((amp >> 1) + amp) >> 1;
else amp >>= volume_shift;
amp = (amp & playing) * 2;
int frequency = this->frequency();
if ( unsigned (frequency - 1) > 2044 ) // frequency < 1 || frequency > 2045
{
if (volume_forced) amp = ((30 >> 1) + 30) >> 1;
else amp = 30 >> volume_shift;
amp &= playing;
playing = false;
}
int delta = amp - last_amp;
if ( delta )
{
last_amp = amp;
synth->offset( time, delta, output );
}
time += delay;
if ( !playing )
time = end_time;
if ( time < end_time )
{
Blip_Buffer* const output = this->output;
int const period = (2048 - frequency) * 2;
int wave_pos = (this->wave_pos + 1) & (wave_size - 1);
do
{
int amp = (wave_size == 32) ? wave [wave_bank + wave_pos] : wave [wave_pos];
if (volume_forced) amp = ((amp >> 1) + amp) >> 1;
else amp >>= volume_shift;
amp *= 2;
wave_pos = (wave_pos + 1) & (wave_size - 1);
int delta = amp - last_amp;
if ( delta )
{
last_amp = amp;
synth->offset_inline( time, delta, output );
}
time += period;
}
while ( time < end_time );
this->wave_pos = (wave_pos - 1) & (wave_size - 1);
}
delay = time - end_time;
}
// Gb_Apu::write_osc
void Gb_Apu::write_osc( int index, int reg, int data )
{
reg -= index * 5;
Gb_Square* sq = &square2;
switch ( index )
{
case 0:
sq = &square1;
case 1:
if ( sq->write_register( reg, data ) && index == 0 )
{
square1.sweep_freq = square1.frequency();
if ( (regs [0] & sq->period_mask) && (regs [0] & sq->shift_mask) )
{
square1.sweep_delay = 1; // cause sweep to recalculate now
square1.clock_sweep();
}
}
break;
case 2:
wave.write_register( reg, data );
break;
case 3:
if ( noise.write_register( reg, data ) )
noise.bits = 0x7FFF;
}
}

90
Gb_Apu/Gb_Oscs.h
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@ -1,90 +0,0 @@
// Private oscillators used by Gb_Apu
// Gb_Snd_Emu 0.1.4
#ifndef GB_OSCS_H
#define GB_OSCS_H
#include "blargg_common.h"
#include "Blip_Buffer.h"
struct Gb_Osc
{
enum { trigger = 0x80 };
enum { len_enabled_mask = 0x40 };
Blip_Buffer* outputs [4]; // NULL, right, left, center
Blip_Buffer* output;
int output_select;
BOOST::uint8_t* regs; // osc's 5 registers
int delay;
int last_amp;
int volume;
int length;
bool enabled;
void reset();
void clock_length();
int frequency() const { return (regs [4] & 7) * 0x100 + regs [3]; }
};
struct Gb_Env : Gb_Osc
{
int env_delay;
void reset();
void clock_envelope();
bool write_register( int, int );
};
struct Gb_Square : Gb_Env
{
enum { period_mask = 0x70 };
enum { shift_mask = 0x07 };
typedef Blip_Synth<blip_good_quality,1> Synth;
Synth const* synth;
int sweep_delay;
int sweep_freq;
int phase;
void reset();
void clock_sweep();
void run( gb_time_t, gb_time_t, int playing );
};
struct Gb_Noise : Gb_Env
{
typedef Blip_Synth<blip_med_quality,1> Synth;
Synth const* synth;
unsigned bits;
void run( gb_time_t, gb_time_t, int playing );
};
struct Gb_Wave : Gb_Osc
{
typedef Blip_Synth<blip_med_quality,1> Synth;
Synth const* synth;
int volume_forced;
int wave_pos;
unsigned wave_mode;
unsigned wave_size;
unsigned wave_bank;
BOOST::uint8_t wave [32 * 2];
void reset(bool gba = false);
void write_register( int, int );
void run( gb_time_t, gb_time_t, int playing );
};
inline void Gb_Env::reset()
{
env_delay = 0;
Gb_Osc::reset();
}
#endif

215
Gb_Apu/Multi_Buffer.cpp
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// Blip_Buffer 0.4.0. http://www.slack.net/~ant/
#include "Multi_Buffer.h"
/* Copyright (C) 2003-2006 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details. You should have received a copy of the GNU Lesser General
Public License along with this module; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include BLARGG_SOURCE_BEGIN
Multi_Buffer::Multi_Buffer( int spf ) : samples_per_frame_( spf )
{
length_ = 0;
sample_rate_ = 0;
channels_changed_count_ = 1;
}
blargg_err_t Multi_Buffer::set_channel_count( int )
{
return blargg_success;
}
Mono_Buffer::Mono_Buffer() : Multi_Buffer( 1 )
{
}
Mono_Buffer::~Mono_Buffer()
{
}
blargg_err_t Mono_Buffer::set_sample_rate( long rate, int msec )
{
BLARGG_RETURN_ERR( buf.set_sample_rate( rate, msec ) );
return Multi_Buffer::set_sample_rate( buf.sample_rate(), buf.length() );
}
// Silent_Buffer
Silent_Buffer::Silent_Buffer() : Multi_Buffer( 1 ) // 0 channels would probably confuse
{
chan.left = NULL;
chan.center = NULL;
chan.right = NULL;
}
// Mono_Buffer
Mono_Buffer::channel_t Mono_Buffer::channel( int )
{
channel_t ch;
ch.center = &buf;
ch.left = &buf;
ch.right = &buf;
return ch;
}
void Mono_Buffer::end_frame( blip_time_t t, bool )
{
buf.end_frame( t );
}
// Stereo_Buffer
Stereo_Buffer::Stereo_Buffer() : Multi_Buffer( 2 )
{
chan.center = &bufs [0];
chan.left = &bufs [1];
chan.right = &bufs [2];
}
Stereo_Buffer::~Stereo_Buffer()
{
}
blargg_err_t Stereo_Buffer::set_sample_rate( long rate, int msec )
{
for ( int i = 0; i < buf_count; i++ )
BLARGG_RETURN_ERR( bufs [i].set_sample_rate( rate, msec ) );
return Multi_Buffer::set_sample_rate( bufs [0].sample_rate(), bufs [0].length() );
}
void Stereo_Buffer::clock_rate( long rate )
{
for ( int i = 0; i < buf_count; i++ )
bufs [i].clock_rate( rate );
}
void Stereo_Buffer::bass_freq( int bass )
{
for ( unsigned i = 0; i < buf_count; i++ )
bufs [i].bass_freq( bass );
}
void Stereo_Buffer::clear()
{
stereo_added = false;
was_stereo = false;
for ( int i = 0; i < buf_count; i++ )
bufs [i].clear();
}
void Stereo_Buffer::end_frame( blip_time_t clock_count, bool stereo )
{
for ( unsigned i = 0; i < buf_count; i++ )
bufs [i].end_frame( clock_count );
stereo_added |= stereo;
}
long Stereo_Buffer::read_samples( blip_sample_t* out, long count )
{
require( !(count & 1) ); // count must be even
count = (unsigned) count / 2;
long avail = bufs [0].samples_avail();
if ( count > avail )
count = avail;
if ( count )
{
if ( stereo_added || was_stereo )
{
mix_stereo( out, count );
bufs [0].remove_samples( count );
bufs [1].remove_samples( count );
bufs [2].remove_samples( count );
}
else
{
mix_mono( out, count );
bufs [0].remove_samples( count );
bufs [1].remove_silence( count );
bufs [2].remove_silence( count );
}
// to do: this might miss opportunities for optimization
if ( !bufs [0].samples_avail() ) {
was_stereo = stereo_added;
stereo_added = false;
}
}
return count * 2;
}
#include BLARGG_ENABLE_OPTIMIZER
void Stereo_Buffer::mix_stereo( blip_sample_t* out, long count )
{
Blip_Reader left;
Blip_Reader right;
Blip_Reader center;
left.begin( bufs [1] );
right.begin( bufs [2] );
int bass = center.begin( bufs [0] );
while ( count-- )
{
int c = center.read();
long l = c + left.read();
long r = c + right.read();
center.next( bass );
out [0] = l;
out [1] = r;
out += 2;
if ( (BOOST::int16_t) l != l )
out [-2] = 0x7FFF - (l >> 24);
left.next( bass );
right.next( bass );
if ( (BOOST::int16_t) r != r )
out [-1] = 0x7FFF - (r >> 24);
}
center.end( bufs [0] );
right.end( bufs [2] );
left.end( bufs [1] );
}
void Stereo_Buffer::mix_mono( blip_sample_t* out, long count )
{
Blip_Reader in;
int bass = in.begin( bufs [0] );
while ( count-- )
{
long s = in.read();
in.next( bass );
out [0] = s;
out [1] = s;
out += 2;
if ( (BOOST::int16_t) s != s ) {
s = 0x7FFF - (s >> 24);
out [-2] = s;
out [-1] = s;
}
}
in.end( bufs [0] );
}

175
Gb_Apu/Multi_Buffer.h
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// Multi-channel sound buffer interface, and basic mono and stereo buffers
// Blip_Buffer 0.4.0
#ifndef MULTI_BUFFER_H
#define MULTI_BUFFER_H
#include "blargg_common.h"
#include "Blip_Buffer.h"
// Interface to one or more Blip_Buffers mapped to one or more channels
// consisting of left, center, and right buffers.
class Multi_Buffer {
public:
Multi_Buffer( int samples_per_frame );
virtual ~Multi_Buffer() { }
// Set the number of channels available
virtual blargg_err_t set_channel_count( int );
// Get indexed channel, from 0 to channel count - 1
struct channel_t {
Blip_Buffer* center;
Blip_Buffer* left;
Blip_Buffer* right;
};
virtual channel_t channel( int index ) = 0;
// See Blip_Buffer.h
virtual blargg_err_t set_sample_rate( long rate, int msec = blip_default_length ) = 0;
virtual void clock_rate( long ) = 0;
virtual void bass_freq( int ) = 0;
virtual void clear() = 0;
long sample_rate() const;
// Length of buffer, in milliseconds
int length() const;
// See Blip_Buffer.h. For optimal operation, pass false for 'added_stereo'
// if nothing was added to the left and right buffers of any channel for
// this time frame.
virtual void end_frame( blip_time_t, bool added_stereo = true ) = 0;
// Number of samples per output frame (1 = mono, 2 = stereo)
int samples_per_frame() const;
// Count of changes to channel configuration. Incremented whenever
// a change is made to any of the Blip_Buffers for any channel.
unsigned channels_changed_count() { return channels_changed_count_; }
// See Blip_Buffer.h
virtual long read_samples( blip_sample_t*, long ) = 0;
virtual long samples_avail() const = 0;
protected:
void channels_changed() { channels_changed_count_++; }
private:
// noncopyable
Multi_Buffer( const Multi_Buffer& );
Multi_Buffer& operator = ( const Multi_Buffer& );
unsigned channels_changed_count_;
long sample_rate_;
int length_;
int const samples_per_frame_;
};
// Uses a single buffer and outputs mono samples.
class Mono_Buffer : public Multi_Buffer {
Blip_Buffer buf;
public:
Mono_Buffer();
~Mono_Buffer();
// Buffer used for all channels
Blip_Buffer* center() { return &buf; }
// See Multi_Buffer
blargg_err_t set_sample_rate( long rate, int msec = blip_default_length );
void clock_rate( long );
void bass_freq( int );
void clear();
channel_t channel( int );
void end_frame( blip_time_t, bool unused = true );
long samples_avail() const;
long read_samples( blip_sample_t*, long );
};
// Uses three buffers (one for center) and outputs stereo sample pairs.
class Stereo_Buffer : public Multi_Buffer {
public:
Stereo_Buffer();
~Stereo_Buffer();
// Buffers used for all channels
Blip_Buffer* center() { return &bufs [0]; }
Blip_Buffer* left() { return &bufs [1]; }
Blip_Buffer* right() { return &bufs [2]; }
// See Multi_Buffer
blargg_err_t set_sample_rate( long, int msec = blip_default_length );
void clock_rate( long );
void bass_freq( int );
void clear();
channel_t channel( int index );
void end_frame( blip_time_t, bool added_stereo = true );
long samples_avail() const;
long read_samples( blip_sample_t*, long );
private:
enum { buf_count = 3 };
Blip_Buffer bufs [buf_count];
channel_t chan;
bool stereo_added;
bool was_stereo;
void mix_stereo( blip_sample_t*, long );
void mix_mono( blip_sample_t*, long );
};
// Silent_Buffer generates no samples, useful where no sound is wanted
class Silent_Buffer : public Multi_Buffer {
channel_t chan;
public:
Silent_Buffer();
blargg_err_t set_sample_rate( long rate, int msec = blip_default_length );
void clock_rate( long ) { }
void bass_freq( int ) { }
void clear() { }
channel_t channel( int ) { return chan; }
void end_frame( blip_time_t, bool unused = true ) { }
long samples_avail() const { return 0; }
long read_samples( blip_sample_t*, long ) { return 0; }
};
// End of public interface
inline blargg_err_t Multi_Buffer::set_sample_rate( long rate, int msec )
{
sample_rate_ = rate;
length_ = msec;
return blargg_success;
}
inline blargg_err_t Silent_Buffer::set_sample_rate( long rate, int msec )
{
return Multi_Buffer::set_sample_rate( rate, msec );
}
inline int Multi_Buffer::samples_per_frame() const { return samples_per_frame_; }
inline long Stereo_Buffer::samples_avail() const { return bufs [0].samples_avail() * 2; }
inline Stereo_Buffer::channel_t Stereo_Buffer::channel( int ) { return chan; }
inline long Multi_Buffer::sample_rate() const { return sample_rate_; }
inline int Multi_Buffer::length() const { return length_; }
inline void Mono_Buffer::clock_rate( long rate ) { buf.clock_rate( rate ); }
inline void Mono_Buffer::clear() { buf.clear(); }
inline void Mono_Buffer::bass_freq( int freq ) { buf.bass_freq( freq ); }
inline long Mono_Buffer::read_samples( blip_sample_t* p, long s ) { return buf.read_samples( p, s ); }
inline long Mono_Buffer::samples_avail() const { return buf.samples_avail(); }
#endif

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Gb_Apu/blargg_common.h
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// Sets up common environment for Shay Green's libraries.
//
// To change configuration options, modify blargg_config.h, not this file.
#ifndef BLARGG_COMMON_H
#define BLARGG_COMMON_H
// HAVE_CONFIG_H: If defined, include user's "config.h" first (which *can*
// re-include blargg_common.h if it needs to)
#ifdef HAVE_CONFIG_H
#undef BLARGG_COMMON_H
#include "config.h"
#define BLARGG_COMMON_H
#endif
// BLARGG_NONPORTABLE: If defined to 1, platform-specific (and possibly non-portable)
// optimizations are used. Defaults to off. Report any problems that occur only when
// this is enabled.
#ifndef BLARGG_NONPORTABLE
#define BLARGG_NONPORTABLE 0
#endif
// BLARGG_BIG_ENDIAN, BLARGG_LITTLE_ENDIAN: Determined automatically, otherwise only
// one must be #defined to 1. Only needed if something actually depends on byte order.
#if !defined (BLARGG_BIG_ENDIAN) && !defined (BLARGG_LITTLE_ENDIAN)
#if defined (MSB_FIRST) || defined (__powerc) || defined (macintosh) || \
defined (WORDS_BIGENDIAN) || defined (__BIG_ENDIAN__)
#define BLARGG_BIG_ENDIAN 1
#else
#define BLARGG_LITTLE_ENDIAN 1
#endif
#endif
// Determine compiler's language support
// Metrowerks CodeWarrior
#if defined (__MWERKS__)
#define BLARGG_COMPILER_HAS_NAMESPACE 1
#if !__option(bool)
#define BLARGG_COMPILER_HAS_BOOL 0
#endif
#define STATIC_CAST(T,expr) static_cast< T > (expr)
// Microsoft Visual C++
#elif defined (_MSC_VER)
#if _MSC_VER < 1100
#define BLARGG_COMPILER_HAS_BOOL 0
#endif
// GNU C++
#elif defined (__GNUC__)
#if __GNUC__ > 2
#define BLARGG_COMPILER_HAS_NAMESPACE 1
#endif
// Mingw
#elif defined (__MINGW32__)
// empty
// Pre-ISO C++ compiler
#elif __cplusplus < 199711
#ifndef BLARGG_COMPILER_HAS_BOOL
#define BLARGG_COMPILER_HAS_BOOL 0
#endif
#endif
/* BLARGG_COMPILER_HAS_BOOL: If 0, provides bool support for old compilers.
If errors occur here, add the following line to your config.h file:
#define BLARGG_COMPILER_HAS_BOOL 0
*/
#if defined (BLARGG_COMPILER_HAS_BOOL) && !BLARGG_COMPILER_HAS_BOOL
typedef int bool;
const bool true = 1;
const bool false = 0;
#endif
// BLARGG_USE_NAMESPACE: If 1, use <cxxx> headers rather than <xxxx.h>
#if BLARGG_USE_NAMESPACE || (!defined (BLARGG_USE_NAMESPACE) && BLARGG_COMPILER_HAS_NAMESPACE)
#include <cstddef>
#include <cstdlib>
#include <cassert>
#include <climits>
#define STD std
#else
#include <stddef.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#define STD
#endif
// BLARGG_NEW is used in place of 'new' to create objects. By default, plain new is used.
// To prevent an exception if out of memory, #define BLARGG_NEW new (std::nothrow)
#ifndef BLARGG_NEW
#define BLARGG_NEW new
#endif
// BOOST::int8_t etc.
// HAVE_STDINT_H: If defined, use <stdint.h> for int8_t etc.
#if defined (HAVE_STDINT_H)
#include <stdint.h>
#define BOOST
// HAVE_INTTYPES_H: If defined, use <stdint.h> for int8_t etc.
#elif defined (HAVE_INTTYPES_H)
#include <inttypes.h>
#define BOOST
#else
struct BOOST
{
#if UCHAR_MAX == 0xFF && SCHAR_MAX == 0x7F
typedef signed char int8_t;
typedef unsigned char uint8_t;
#else
// No suitable 8-bit type available
typedef struct see_blargg_common_h int8_t;
typedef struct see_blargg_common_h uint8_t;
#endif
#if USHRT_MAX == 0xFFFF
typedef short int16_t;
typedef unsigned short uint16_t;
#else
// No suitable 16-bit type available
typedef struct see_blargg_common_h int16_t;
typedef struct see_blargg_common_h uint16_t;
#endif
#if ULONG_MAX == 0xFFFFFFFF
typedef long int32_t;
typedef unsigned long uint32_t;
#elif UINT_MAX == 0xFFFFFFFF
typedef int int32_t;
typedef unsigned int uint32_t;
#else
// No suitable 32-bit type available
typedef struct see_blargg_common_h int32_t;
typedef struct see_blargg_common_h uint32_t;
#endif
};
#endif
// BLARGG_SOURCE_BEGIN: Library sources #include this after other #includes.
#ifndef BLARGG_SOURCE_BEGIN
#define BLARGG_SOURCE_BEGIN "blargg_source.h"
#endif
// BLARGG_ENABLE_OPTIMIZER: Library sources #include this for speed-critical code
#ifndef BLARGG_ENABLE_OPTIMIZER
#define BLARGG_ENABLE_OPTIMIZER "blargg_common.h"
#endif
// BLARGG_CPU_*: Used to select between some optimizations
#if !defined (BLARGG_CPU_POWERPC) && !defined (BLARGG_CPU_X86)
#if defined (__powerc)
#define BLARGG_CPU_POWERPC 1
#elif defined (_MSC_VER) && defined (_M_IX86)
#define BLARGG_CPU_X86 1
#endif
#endif
// BOOST_STATIC_ASSERT( expr ): Generates compile error if expr is 0.
#ifndef BOOST_STATIC_ASSERT
#ifdef _MSC_VER
// MSVC6 (_MSC_VER < 1300) fails for use of __LINE__ when /Zl is specified
#define BOOST_STATIC_ASSERT( expr ) \
void blargg_failed_( int (*arg) [2 / ((expr) ? 1 : 0) - 1] )
#else
// Some other compilers fail when declaring same function multiple times in class,
// so differentiate them by line
#define BOOST_STATIC_ASSERT( expr ) \
void blargg_failed_( int (*arg) [2 / ((expr) ? 1 : 0) - 1] [__LINE__] )
#endif
#endif
// STATIC_CAST(T,expr): Used in place of static_cast<T> (expr)
#ifndef STATIC_CAST
#define STATIC_CAST(T,expr) ((T) (expr))
#endif
// blargg_err_t (NULL on success, otherwise error string)
#ifndef blargg_err_t
typedef const char* blargg_err_t;
#endif
const char* const blargg_success = 0;
// blargg_vector: Simple array that does *not* work for types with a constructor (non-POD).
template<class T>
class blargg_vector {
T* begin_;
STD::size_t size_;
public:
blargg_vector() : begin_( 0 ), size_( 0 ) { }
~blargg_vector() { STD::free( begin_ ); }
typedef STD::size_t size_type;
blargg_err_t resize( size_type n )
{
void* p = STD::realloc( begin_, n * sizeof (T) );
if ( !p && n )
return "Out of memory";
begin_ = (T*) p;
size_ = n;
return 0;
}
void clear()
{
void* p = begin_;
begin_ = 0;
size_ = 0;
STD::free( p );
}
size_type size() const { return size_; }
T* begin() { return begin_; }
T* end() { return begin_ + size_; }
const T* begin() const { return begin_; }
const T* end() const { return begin_ + size_; }
T& operator [] ( size_type n )
{
assert( n <= size_ ); // allow for past-the-end value
return begin_ [n];
}
const T& operator [] ( size_type n ) const
{
assert( n <= size_ ); // allow for past-the-end value
return begin_ [n];
}
};
#endif

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Gb_Apu/blargg_endian.h
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// CPU Byte Order Utilities
// Game_Music_Emu 0.3.0
#ifndef BLARGG_ENDIAN
#define BLARGG_ENDIAN
#include "blargg_common.h"
#if 0
// Read 16/32-bit little-endian integer from memory
unsigned GET_LE16( void const* );
unsigned long GET_LE32( void const* );
// Read 16/32-bit big-endian integer from memory
unsigned GET_BE16( void const* );
unsigned long GET_BE32( void const* );
// Write 16/32-bit integer to memory in little-endian format
void SET_LE16( void*, unsigned );
void SET_LE32( void*, unsigned );
// Write 16/32-bit integer to memory in big-endian format
void SET_BE16( void*, unsigned long );
void SET_BE32( void*, unsigned long );
#endif
inline unsigned get_le16( void const* p )
{
return ((unsigned char*) p) [1] * 0x100 +
((unsigned char*) p) [0];
}
inline unsigned get_be16( void const* p )
{
return ((unsigned char*) p) [0] * 0x100 +
((unsigned char*) p) [1];
}
inline unsigned long get_le32( void const* p )
{
return ((unsigned char*) p) [3] * 0x01000000 +
((unsigned char*) p) [2] * 0x00010000 +
((unsigned char*) p) [1] * 0x00000100 +
((unsigned char*) p) [0];
}
inline unsigned long get_be32( void const* p )
{
return ((unsigned char*) p) [0] * 0x01000000 +
((unsigned char*) p) [1] * 0x00010000 +
((unsigned char*) p) [2] * 0x00000100 +
((unsigned char*) p) [3];
}
inline void set_le16( void* p, unsigned n )
{
((unsigned char*) p) [1] = (unsigned char) (n >> 8);
((unsigned char*) p) [0] = (unsigned char) n;
}
inline void set_be16( void* p, unsigned n )
{
((unsigned char*) p) [0] = (unsigned char) (n >> 8);
((unsigned char*) p) [1] = (unsigned char) n;
}
inline void set_le32( void* p, unsigned long n )
{
((unsigned char*) p) [3] = (unsigned char) (n >> 24);
((unsigned char*) p) [2] = (unsigned char) (n >> 16);
((unsigned char*) p) [1] = (unsigned char) (n >> 8);
((unsigned char*) p) [0] = (unsigned char) n;
}
inline void set_be32( void* p, unsigned long n )
{
((unsigned char*) p) [0] = (unsigned char) (n >> 24);
((unsigned char*) p) [1] = (unsigned char) (n >> 16);
((unsigned char*) p) [2] = (unsigned char) (n >> 8);
((unsigned char*) p) [3] = (unsigned char) n;
}
#ifndef GET_LE16
// Optimized implementation if byte order is known
#if BLARGG_NONPORTABLE && BLARGG_LITTLE_ENDIAN
#define GET_LE16( addr ) (*(BOOST::uint16_t*) (addr))
#define GET_LE32( addr ) (*(BOOST::uint32_t*) (addr))
#define SET_LE16( addr, data ) (void (*(BOOST::uint16_t*) (addr) = (data)))
#define SET_LE32( addr, data ) (void (*(BOOST::uint32_t*) (addr) = (data)))
#elif BLARGG_NONPORTABLE && BLARGG_CPU_POWERPC
// PowerPC has special byte-reversed instructions
// to do: assumes that PowerPC is running in big-endian mode
#define GET_LE16( addr ) (__lhbrx( (addr), 0 ))
#define GET_LE32( addr ) (__lwbrx( (addr), 0 ))
#define SET_LE16( addr, data ) (__sthbrx( (data), (addr), 0 ))
#define SET_LE32( addr, data ) (__stwbrx( (data), (addr), 0 ))
#define GET_BE16( addr ) (*(BOOST::uint16_t*) (addr))
#define GET_BE32( addr ) (*(BOOST::uint32_t*) (addr))
#define SET_BE16( addr, data ) (void (*(BOOST::uint16_t*) (addr) = (data)))
#define SET_BE32( addr, data ) (void (*(BOOST::uint32_t*) (addr) = (data)))
#endif
#endif
#ifndef GET_LE16
#define GET_LE16( addr ) get_le16( addr )
#endif
#ifndef GET_LE32
#define GET_LE32( addr ) get_le32( addr )
#endif
#ifndef SET_LE16
#define SET_LE16( addr, data ) set_le16( addr, data )
#endif
#ifndef SET_LE32
#define SET_LE32( addr, data ) set_le32( addr, data )
#endif
#ifndef GET_BE16
#define GET_BE16( addr ) get_be16( addr )
#endif
#ifndef GET_BE32
#define GET_BE32( addr ) get_be32( addr )
#endif
#ifndef SET_BE16
#define SET_BE16( addr, data ) set_be16( addr, data )
#endif
#ifndef SET_BE32
#define SET_BE32( addr, data ) set_be32( addr, data )
#endif
// auto-selecting versions
inline void set_le( BOOST::uint16_t* p, unsigned n ) { SET_LE16( p, n ); }
inline void set_le( BOOST::uint32_t* p, unsigned long n ) { SET_LE32( p, n ); }
inline void set_be( BOOST::uint16_t* p, unsigned n ) { SET_BE16( p, n ); }
inline void set_be( BOOST::uint32_t* p, unsigned long n ) { SET_BE32( p, n ); }
inline unsigned get_le( BOOST::uint16_t* p ) { return GET_LE16( p ); }
inline unsigned long get_le( BOOST::uint32_t* p ) { return GET_LE32( p ); }
inline unsigned get_be( BOOST::uint16_t* p ) { return GET_BE16( p ); }
inline unsigned long get_be( BOOST::uint32_t* p ) { return GET_BE32( p ); }
#endif

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// By default, #included at beginning of library source files.
// Can be overridden by #defining BLARGG_SOURCE_BEGIN to path of alternate file.
// Copyright (C) 2005 Shay Green.
#ifndef BLARGG_SOURCE_H
#define BLARGG_SOURCE_H
// If debugging is enabled, abort program if expr is false. Meant for checking
// internal state and consistency. A failed assertion indicates a bug in the module.
// void assert( bool expr );
#include <assert.h>
// If debugging is enabled and expr is false, abort program. Meant for checking
// caller-supplied parameters and operations that are outside the control of the
// module. A failed requirement indicates a bug outside the module.
// void require( bool expr );
#undef require
#define require( expr ) assert( expr )
// Like printf() except output goes to debug log file. Might be defined to do
// nothing (not even evaluate its arguments).
// void dprintf( const char* format, ... );
#undef dprintf
#ifdef BLARGG_DPRINTF
#define dprintf BLARGG_DPRINTF
#else
inline void blargg_dprintf_( const char*, ... ) { }
#define dprintf (1) ? (void) 0 : blargg_dprintf_
#endif
// If enabled, evaluate expr and if false, make debug log entry with source file
// and line. Meant for finding situations that should be examined further, but that
// don't indicate a problem. In all cases, execution continues normally.
#undef check
#ifdef BLARGG_CHECK
#define check( expr ) BLARGG_CHECK( expr )
#else
#define check( expr ) ((void) 0)
#endif
// If expr returns non-NULL error string, return it from current function, otherwise continue.
#define BLARGG_RETURN_ERR( expr ) do { \
blargg_err_t blargg_return_err_ = (expr); \
if ( blargg_return_err_ ) return blargg_return_err_; \
} while ( 0 )
// If ptr is NULL, return out of memory error string.
#define BLARGG_CHECK_ALLOC( ptr ) do { if ( (ptr) == 0 ) return "Out of memory"; } while ( 0 )
// Avoid any macros which evaluate their arguments multiple times
#undef min
#undef max
// using const references generates crappy code, and I am currenly only using these
// for built-in types, so they take arguments by value
template<class T>
inline T min( T x, T y )
{
if ( x < y )
return x;
return y;
}
template<class T>
inline T max( T x, T y )
{
if ( x < y )
return y;
return x;
}
#endif

13
Gb_Apu/boost/config.hpp
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@ -1,13 +0,0 @@
// Boost substitute. For full boost library see http://boost.org
#ifndef BOOST_CONFIG_HPP
#define BOOST_CONFIG_HPP
#define BOOST_MINIMAL 1
#define BLARGG_BEGIN_NAMESPACE( name )
#define BLARGG_END_NAMESPACE
#endif

42
Gb_Apu/boost/cstdint.hpp
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@ -1,42 +0,0 @@
// Boost substitute. For full boost library see http://boost.org
#ifndef BOOST_CSTDINT_HPP
#define BOOST_CSTDINT_HPP
#if BLARGG_USE_NAMESPACE
#include <climits>
#else
#include <limits.h>
#endif
BLARGG_BEGIN_NAMESPACE( boost )
#if UCHAR_MAX != 0xFF || SCHAR_MAX != 0x7F
# error "No suitable 8-bit type available"
#endif
typedef unsigned char uint8_t;
typedef signed char int8_t;
#if USHRT_MAX != 0xFFFF
# error "No suitable 16-bit type available"
#endif
typedef short int16_t;
typedef unsigned short uint16_t;
#if ULONG_MAX == 0xFFFFFFFF
typedef long int32_t;
typedef unsigned long uint32_t;
#elif UINT_MAX == 0xFFFFFFFF
typedef int int32_t;
typedef unsigned int uint32_t;
#else
# error "No suitable 32-bit type available"
#endif
BLARGG_END_NAMESPACE
#endif

22
Gb_Apu/boost/static_assert.hpp
View File

@ -1,22 +0,0 @@
// Boost substitute. For full boost library see http://boost.org
#ifndef BOOST_STATIC_ASSERT_HPP
#define BOOST_STATIC_ASSERT_HPP
#if defined (_MSC_VER) && _MSC_VER <= 1200
// MSVC6 can't handle the ##line concatenation
#define BOOST_STATIC_ASSERT( expr ) struct { int n [1 / ((expr) ? 1 : 0)]; }
#else
#define BOOST_STATIC_ASSERT3( expr, line ) \
typedef int boost_static_assert_##line [1 / ((expr) ? 1 : 0)]
#define BOOST_STATIC_ASSERT2( expr, line ) BOOST_STATIC_ASSERT3( expr, line )
#define BOOST_STATIC_ASSERT( expr ) BOOST_STATIC_ASSERT2( expr, __LINE__ )
#endif
#endif

43
VBA.vcproj
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@ -158,46 +158,21 @@
/>
<Tool
Name="VCCLCompilerTool"
Optimization="3"
InlineFunctionExpansion="0"
EnableIntrinsicFunctions="true"
AdditionalOptions="/D_ST_MODEL&#x0D;&#x0A;/D_SECURE_SCL=0"
Optimization="2"
InlineFunctionExpansion="2"
FavorSizeOrSpeed="1"
OmitFramePointers="true"
EnableFiberSafeOptimizations="false"
WholeProgramOptimization="true"
AdditionalIncludeDirectories="&quot;$(SolutionDir)src\win32\dependencies\zlib&quot;;&quot;$(SolutionDir)src\win32\dependencies\libpng&quot;;&quot;$(SolutionDir)src\win32\dependencies\cximage&quot;"
PreprocessorDefinitions="WIN32;_WINDOWS;NDEBUG;FINAL_VERSION;MMX;_CRT_SECURE_NO_WARNINGS"
IgnoreStandardIncludePath="false"
GeneratePreprocessedFile="0"
KeepComments="false"
StringPooling="false"
MinimalRebuild="false"
ExceptionHandling="1"
BasicRuntimeChecks="0"
SmallerTypeCheck="false"
AdditionalIncludeDirectories=".\src\win32\dependencies\zlib;.\src\win32\dependencies\libpng;.\src\win32\dependencies\cximage"
PreprocessorDefinitions="WIN32;WINVER=0x0500;NDEBUG;_WINDOWS;OEMRESOURCE;MMX;ASM;FINAL_VERSION;BKPT_SUPPORT;_CRT_SECURE_NO_DEPRECATE"
RuntimeLibrary="0"
StructMemberAlignment="0"
BufferSecurityCheck="true"
EnableFunctionLevelLinking="false"
EnableEnhancedInstructionSet="0"
DisableLanguageExtensions="false"
DefaultCharIsUnsigned="false"
TreatWChar_tAsBuiltInType="false"
ForceConformanceInForLoopScope="false"
RuntimeTypeInfo="false"
BufferSecurityCheck="false"
EnableEnhancedInstructionSet="1"
FloatingPointModel="2"
UsePrecompiledHeader="0"
ExpandAttributedSource="false"
AssemblerOutput="0"
BrowseInformation="0"
WarningLevel="3"
WarnAsError="false"
SuppressStartupBanner="true"
Detect64BitPortabilityProblems="false"
DebugInformationFormat="0"
CallingConvention="0"
CompileAs="2"
ShowIncludes="false"
UndefineAllPreprocessorDefinitions="false"
DebugInformationFormat="3"
/>
<Tool
Name="VCManagedResourceCompilerTool"

226
libpng/libpng.vcproj
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@ -1,226 +0,0 @@
<?xml version="1.0" encoding="Windows-1252"?>
<VisualStudioProject
ProjectType="Visual C++"
Version="8.00"
Name="libpng"
ProjectGUID="{664BE444-CCED-4C81-9724-7057ECBAAC82}"
RootNamespace="libpng"
Keyword="Win32Proj"
>
<Platforms>
<Platform
Name="Win32"
/>
</Platforms>
<ToolFiles>
</ToolFiles>
<Configurations>
<Configuration
Name="Debug|Win32"
OutputDirectory="Debug"
IntermediateDirectory="Debug"
ConfigurationType="4"
InheritedPropertySheets="$(VCInstallDir)VCProjectDefaults\UpgradeFromVC71.vsprops"
CharacterSet="2"
>
<Tool
Name="VCPreBuildEventTool"
/>
<Tool
Name="VCCustomBuildTool"
/>
<Tool
Name="VCXMLDataGeneratorTool"
/>
<Tool
Name="VCWebServiceProxyGeneratorTool"
/>
<Tool
Name="VCMIDLTool"
/>
<Tool
Name="VCCLCompilerTool"
Optimization="0"
AdditionalIncludeDirectories="&quot;$(SolutionDir)zlib&quot;"
PreprocessorDefinitions="WIN32;_DEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
MinimalRebuild="true"
BasicRuntimeChecks="3"
RuntimeLibrary="1"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="true"
DebugInformationFormat="4"
/>
<Tool
Name="VCManagedResourceCompilerTool"
/>
<Tool
Name="VCResourceCompilerTool"
/>
<Tool
Name="VCPreLinkEventTool"
/>
<Tool
Name="VCLibrarianTool"
OutputFile="$(OutDir)/libpng.lib"
/>
<Tool
Name="VCALinkTool"
/>
<Tool
Name="VCXDCMakeTool"
/>
<Tool
Name="VCBscMakeTool"
/>
<Tool
Name="VCFxCopTool"
/>
<Tool
Name="VCPostBuildEventTool"
/>
</Configuration>
<Configuration
Name="Release|Win32"
OutputDirectory="Release"
IntermediateDirectory="Release"
ConfigurationType="4"
InheritedPropertySheets="$(VCInstallDir)VCProjectDefaults\UpgradeFromVC71.vsprops"
CharacterSet="2"
>
<Tool
Name="VCPreBuildEventTool"
/>
<Tool
Name="VCCustomBuildTool"
/>
<Tool
Name="VCXMLDataGeneratorTool"
/>
<Tool
Name="VCWebServiceProxyGeneratorTool"
/>
<Tool
Name="VCMIDLTool"
/>
<Tool
Name="VCCLCompilerTool"
AdditionalIncludeDirectories="&quot;$(SolutionDir)zlib&quot;"
PreprocessorDefinitions="WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS"
RuntimeLibrary="0"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="true"
DebugInformationFormat="3"
CompileAs="1"
/>
<Tool
Name="VCManagedResourceCompilerTool"
/>
<Tool
Name="VCResourceCompilerTool"
/>
<Tool
Name="VCPreLinkEventTool"
/>
<Tool
Name="VCLibrarianTool"
OutputFile="$(OutDir)/libpng.lib"
IgnoreAllDefaultLibraries="true"
/>
<Tool
Name="VCALinkTool"
/>
<Tool
Name="VCXDCMakeTool"
/>
<Tool
Name="VCBscMakeTool"
/>
<Tool
Name="VCFxCopTool"
/>
<Tool
Name="VCPostBuildEventTool"
/>
</Configuration>
</Configurations>
<References>
</References>
<Files>
<File
RelativePath=".\png.c"
>
</File>
<File
RelativePath=".\png.h"
>
</File>
<File
RelativePath=".\pngconf.h"
>
</File>
<File
RelativePath=".\pngerror.c"
>
</File>
<File
RelativePath=".\pngget.c"
>
</File>
<File
RelativePath=".\pngmem.c"
>
</File>
<File
RelativePath=".\pngpread.c"
>
</File>
<File
RelativePath=".\pngread.c"
>
</File>
<File
RelativePath=".\pngrio.c"
>
</File>
<File
RelativePath=".\pngrtran.c"
>
</File>
<File
RelativePath=".\pngrutil.c"
>
</File>
<File
RelativePath=".\pngset.c"
>
</File>
<File
RelativePath=".\pngtrans.c"
>
</File>
<File
RelativePath=".\pngvcrd.c"
>
</File>
<File
RelativePath=".\pngwio.c"
>
</File>
<File
RelativePath=".\pngwrite.c"
>
</File>
<File
RelativePath=".\pngwtran.c"
>
</File>
<File
RelativePath=".\pngwutil.c"
>
</File>
</Files>
<Globals>
</Globals>
</VisualStudioProject>

158
libpng/libpng.vcproj.7.10.old
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@ -1,158 +0,0 @@
<?xml version="1.0" encoding="Windows-1252"?>
<VisualStudioProject
ProjectType="Visual C++"
Version="7.10"
Name="libpng"
ProjectGUID="{664BE444-CCED-4C81-9724-7057ECBAAC82}"
RootNamespace="libpng"
Keyword="Win32Proj">
<Platforms>
<Platform
Name="Win32"/>
</Platforms>
<Configurations>
<Configuration
Name="Debug|Win32"
OutputDirectory="Debug"
IntermediateDirectory="Debug"
ConfigurationType="4"
CharacterSet="2">
<Tool
Name="VCCLCompilerTool"
Optimization="0"
AdditionalIncludeDirectories="&quot;$(SolutionDir)zlib&quot;"
PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
MinimalRebuild="TRUE"
BasicRuntimeChecks="3"
RuntimeLibrary="1"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="TRUE"
DebugInformationFormat="4"/>
<Tool
Name="VCCustomBuildTool"/>
<Tool
Name="VCLibrarianTool"
OutputFile="$(OutDir)/libpng.lib"/>
<Tool
Name="VCMIDLTool"/>
<Tool
Name="VCPostBuildEventTool"/>
<Tool
Name="VCPreBuildEventTool"/>
<Tool
Name="VCPreLinkEventTool"/>
<Tool
Name="VCResourceCompilerTool"/>
<Tool
Name="VCWebServiceProxyGeneratorTool"/>
<Tool
Name="VCXMLDataGeneratorTool"/>
<Tool
Name="VCManagedWrapperGeneratorTool"/>
<Tool
Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
</Configuration>
<Configuration
Name="Release|Win32"
OutputDirectory="Release"
IntermediateDirectory="Release"
ConfigurationType="4"
CharacterSet="2">
<Tool
Name="VCCLCompilerTool"
AdditionalIncludeDirectories="&quot;$(SolutionDir)zlib&quot;"
PreprocessorDefinitions="WIN32;NDEBUG;_LIB"
RuntimeLibrary="0"
UsePrecompiledHeader="0"
WarningLevel="3"
Detect64BitPortabilityProblems="TRUE"
DebugInformationFormat="3"
CompileAs="1"/>
<Tool
Name="VCCustomBuildTool"/>
<Tool
Name="VCLibrarianTool"
OutputFile="$(OutDir)/libpng.lib"
IgnoreAllDefaultLibraries="TRUE"/>
<Tool
Name="VCMIDLTool"/>
<Tool
Name="VCPostBuildEventTool"/>
<Tool
Name="VCPreBuildEventTool"/>
<Tool
Name="VCPreLinkEventTool"/>
<Tool
Name="VCResourceCompilerTool"/>
<Tool
Name="VCWebServiceProxyGeneratorTool"/>
<Tool
Name="VCXMLDataGeneratorTool"/>
<Tool
Name="VCManagedWrapperGeneratorTool"/>
<Tool
Name="VCAuxiliaryManagedWrapperGeneratorTool"/>
</Configuration>
</Configurations>
<References>
</References>
<Files>
<File
RelativePath=".\png.c">
</File>
<File
RelativePath=".\png.h">
</File>
<File
RelativePath=".\pngconf.h">
</File>
<File
RelativePath=".\pngerror.c">
</File>
<File
RelativePath=".\pngget.c">
</File>
<File
RelativePath=".\pngmem.c">
</File>
<File
RelativePath=".\pngpread.c">
</File>
<File
RelativePath=".\pngread.c">
</File>
<File
RelativePath=".\pngrio.c">
</File>
<File
RelativePath=".\pngrtran.c">
</File>
<File
RelativePath=".\pngrutil.c">
</File>
<File
RelativePath=".\pngset.c">
</File>
<File
RelativePath=".\pngtrans.c">
</File>
<File
RelativePath=".\pngvcrd.c">
</File>
<File
RelativePath=".\pngwio.c">
</File>
<File
RelativePath=".\pngwrite.c">
</File>
<File
RelativePath=".\pngwtran.c">
</File>
<File
RelativePath=".\pngwutil.c">
</File>
</Files>
<Globals>
</Globals>
</VisualStudioProject>

828
libpng/png.c
View File

@ -1,828 +0,0 @@
/* png.c - location for general purpose libpng functions
*
* libpng version 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*/
#define PNG_INTERNAL
#define PNG_NO_EXTERN
#include "png.h"
/* Generate a compiler error if there is an old png.h in the search path. */
typedef version_1_2_8 Your_png_h_is_not_version_1_2_8;
/* Version information for C files. This had better match the version
* string defined in png.h. */
#ifdef PNG_USE_GLOBAL_ARRAYS
/* png_libpng_ver was changed to a function in version 1.0.5c */
const char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING;
/* png_sig was changed to a function in version 1.0.5c */
/* Place to hold the signature string for a PNG file. */
const png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
/* Invoke global declarations for constant strings for known chunk types */
PNG_IHDR;
PNG_IDAT;
PNG_IEND;
PNG_PLTE;
PNG_bKGD;
PNG_cHRM;
PNG_gAMA;
PNG_hIST;
PNG_iCCP;
PNG_iTXt;
PNG_oFFs;
PNG_pCAL;
PNG_sCAL;
PNG_pHYs;
PNG_sBIT;
PNG_sPLT;
PNG_sRGB;
PNG_tEXt;
PNG_tIME;
PNG_tRNS;
PNG_zTXt;
/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* start of interlace block */
const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
/* offset to next interlace block */
const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
/* start of interlace block in the y direction */
const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
/* offset to next interlace block in the y direction */
const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
/* width of interlace block (used in assembler routines only) */
#ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
const int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1};
#endif
/* Height of interlace block. This is not currently used - if you need
* it, uncomment it here and in png.h
const int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
*/
/* Mask to determine which pixels are valid in a pass */
const int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
/* Mask to determine which pixels to overwrite while displaying */
const int FARDATA png_pass_dsp_mask[]
= {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff};
#endif /* PNG_USE_GLOBAL_ARRAYS */
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
* stream we can set num_bytes = 8 so that libpng will not attempt to read
* or write any of the magic bytes before it starts on the IHDR.
*/
void PNGAPI
png_set_sig_bytes(png_structp png_ptr, int num_bytes)
{
png_debug(1, "in png_set_sig_bytes\n");
if (num_bytes > 8)
png_error(png_ptr, "Too many bytes for PNG signature.");
png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
}
/* Checks whether the supplied bytes match the PNG signature. We allow
* checking less than the full 8-byte signature so that those apps that
* already read the first few bytes of a file to determine the file type
* can simply check the remaining bytes for extra assurance. Returns
* an integer less than, equal to, or greater than zero if sig is found,
* respectively, to be less than, to match, or be greater than the correct
* PNG signature (this is the same behaviour as strcmp, memcmp, etc).
*/
int PNGAPI
png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
{
png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};
if (num_to_check > 8)
num_to_check = 8;
else if (num_to_check < 1)
return (0);
if (start > 7)
return (0);
if (start + num_to_check > 8)
num_to_check = 8 - start;
return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check)));
}
/* (Obsolete) function to check signature bytes. It does not allow one
* to check a partial signature. This function might be removed in the
* future - use png_sig_cmp(). Returns true (nonzero) if the file is a PNG.
*/
int PNGAPI
png_check_sig(png_bytep sig, int num)
{
return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
}
/* Function to allocate memory for zlib and clear it to 0. */
#ifdef PNG_1_0_X
voidpf PNGAPI
#else
voidpf /* private */
#endif
png_zalloc(voidpf png_ptr, uInt items, uInt size)
{
png_voidp ptr;
png_structp p=png_ptr;
png_uint_32 save_flags=p->flags;
png_uint_32 num_bytes;
if (items > PNG_UINT_32_MAX/size)
{
png_warning (png_ptr, "Potential overflow in png_zalloc()");
return (NULL);
}
num_bytes = (png_uint_32)items * size;
p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes);
p->flags=save_flags;
#if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO)
if (ptr == NULL)
return ((voidpf)ptr);
if (num_bytes > (png_uint_32)0x8000L)
{
png_memset(ptr, 0, (png_size_t)0x8000L);
png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0,
(png_size_t)(num_bytes - (png_uint_32)0x8000L));
}
else
{
png_memset(ptr, 0, (png_size_t)num_bytes);
}
#endif
return ((voidpf)ptr);
}
/* function to free memory for zlib */
#ifdef PNG_1_0_X
void PNGAPI
#else
void /* private */
#endif
png_zfree(voidpf png_ptr, voidpf ptr)
{
png_free((png_structp)png_ptr, (png_voidp)ptr);
}
/* Reset the CRC variable to 32 bits of 1's. Care must be taken
* in case CRC is > 32 bits to leave the top bits 0.
*/
void /* PRIVATE */
png_reset_crc(png_structp png_ptr)
{
png_ptr->crc = crc32(0, Z_NULL, 0);
}
/* Calculate the CRC over a section of data. We can only pass as
* much data to this routine as the largest single buffer size. We
* also check that this data will actually be used before going to the
* trouble of calculating it.
*/
void /* PRIVATE */
png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length)
{
int need_crc = 1;
if (png_ptr->chunk_name[0] & 0x20) /* ancillary */
{
if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) ==
(PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN))
need_crc = 0;
}
else /* critical */
{
if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE)
need_crc = 0;
}
if (need_crc)
png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length);
}
/* Allocate the memory for an info_struct for the application. We don't
* really need the png_ptr, but it could potentially be useful in the
* future. This should be used in favour of malloc(png_sizeof(png_info))
* and png_info_init() so that applications that want to use a shared
* libpng don't have to be recompiled if png_info changes size.
*/
png_infop PNGAPI
png_create_info_struct(png_structp png_ptr)
{
png_infop info_ptr;
png_debug(1, "in png_create_info_struct\n");
if(png_ptr == NULL) return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
png_ptr->malloc_fn, png_ptr->mem_ptr);
#else
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
#endif
if (info_ptr != NULL)
png_info_init_3(&info_ptr, png_sizeof(png_info));
return (info_ptr);
}
/* This function frees the memory associated with a single info struct.
* Normally, one would use either png_destroy_read_struct() or
* png_destroy_write_struct() to free an info struct, but this may be
* useful for some applications.
*/
void PNGAPI
png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr)
{
png_infop info_ptr = NULL;
png_debug(1, "in png_destroy_info_struct\n");
if (info_ptr_ptr != NULL)
info_ptr = *info_ptr_ptr;
if (info_ptr != NULL)
{
png_info_destroy(png_ptr, info_ptr);
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn,
png_ptr->mem_ptr);
#else
png_destroy_struct((png_voidp)info_ptr);
#endif
*info_ptr_ptr = NULL;
}
}
/* Initialize the info structure. This is now an internal function (0.89)
* and applications using it are urged to use png_create_info_struct()
* instead.
*/
#if defined(PNG_1_0_X) || defined (PNG_1_2_X)
#undef png_info_init
void PNGAPI
png_info_init(png_infop info_ptr)
{
/* We only come here via pre-1.0.12-compiled applications */
png_info_init_3(&info_ptr, 0);
}
#endif
void PNGAPI
png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
{
png_infop info_ptr = *ptr_ptr;
png_debug(1, "in png_info_init_3\n");
if(png_sizeof(png_info) > png_info_struct_size)
{
png_destroy_struct(info_ptr);
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
*ptr_ptr = info_ptr;
}
/* set everything to 0 */
png_memset(info_ptr, 0, png_sizeof (png_info));
}
#ifdef PNG_FREE_ME_SUPPORTED
void PNGAPI
png_data_freer(png_structp png_ptr, png_infop info_ptr,
int freer, png_uint_32 mask)
{
png_debug(1, "in png_data_freer\n");
if (png_ptr == NULL || info_ptr == NULL)
return;
if(freer == PNG_DESTROY_WILL_FREE_DATA)
info_ptr->free_me |= mask;
else if(freer == PNG_USER_WILL_FREE_DATA)
info_ptr->free_me &= ~mask;
else
png_warning(png_ptr,
"Unknown freer parameter in png_data_freer.");
}
#endif
void PNGAPI
png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
int num)
{
png_debug(1, "in png_free_data\n");
if (png_ptr == NULL || info_ptr == NULL)
return;
#if defined(PNG_TEXT_SUPPORTED)
/* free text item num or (if num == -1) all text items */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
#else
if (mask & PNG_FREE_TEXT)
#endif
{
if (num != -1)
{
if (info_ptr->text && info_ptr->text[num].key)
{
png_free(png_ptr, info_ptr->text[num].key);
info_ptr->text[num].key = NULL;
}
}
else
{
int i;
for (i = 0; i < info_ptr->num_text; i++)
png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL;
info_ptr->num_text=0;
}
}
#endif
#if defined(PNG_tRNS_SUPPORTED)
/* free any tRNS entry */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
#else
if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS))
#endif
{
png_free(png_ptr, info_ptr->trans);
info_ptr->valid &= ~PNG_INFO_tRNS;
#ifndef PNG_FREE_ME_SUPPORTED
png_ptr->flags &= ~PNG_FLAG_FREE_TRNS;
#endif
info_ptr->trans = NULL;
}
#endif
#if defined(PNG_sCAL_SUPPORTED)
/* free any sCAL entry */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
#else
if (mask & PNG_FREE_SCAL)
#endif
{
#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED)
png_free(png_ptr, info_ptr->scal_s_width);
png_free(png_ptr, info_ptr->scal_s_height);
info_ptr->scal_s_width = NULL;
info_ptr->scal_s_height = NULL;
#endif
info_ptr->valid &= ~PNG_INFO_sCAL;
}
#endif
#if defined(PNG_pCAL_SUPPORTED)
/* free any pCAL entry */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
#else
if (mask & PNG_FREE_PCAL)
#endif
{
png_free(png_ptr, info_ptr->pcal_purpose);
png_free(png_ptr, info_ptr->pcal_units);
info_ptr->pcal_purpose = NULL;
info_ptr->pcal_units = NULL;
if (info_ptr->pcal_params != NULL)
{
int i;
for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
{
png_free(png_ptr, info_ptr->pcal_params[i]);
info_ptr->pcal_params[i]=NULL;
}
png_free(png_ptr, info_ptr->pcal_params);
info_ptr->pcal_params = NULL;
}
info_ptr->valid &= ~PNG_INFO_pCAL;
}
#endif
#if defined(PNG_iCCP_SUPPORTED)
/* free any iCCP entry */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
#else
if (mask & PNG_FREE_ICCP)
#endif
{
png_free(png_ptr, info_ptr->iccp_name);
png_free(png_ptr, info_ptr->iccp_profile);
info_ptr->iccp_name = NULL;
info_ptr->iccp_profile = NULL;
info_ptr->valid &= ~PNG_INFO_iCCP;
}
#endif
#if defined(PNG_sPLT_SUPPORTED)
/* free a given sPLT entry, or (if num == -1) all sPLT entries */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
#else
if (mask & PNG_FREE_SPLT)
#endif
{
if (num != -1)
{
if(info_ptr->splt_palettes)
{
png_free(png_ptr, info_ptr->splt_palettes[num].name);
png_free(png_ptr, info_ptr->splt_palettes[num].entries);
info_ptr->splt_palettes[num].name = NULL;
info_ptr->splt_palettes[num].entries = NULL;
}
}
else
{
if(info_ptr->splt_palettes_num)
{
int i;
for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes = NULL;
info_ptr->splt_palettes_num = 0;
}
info_ptr->valid &= ~PNG_INFO_sPLT;
}
}
#endif
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
#else
if (mask & PNG_FREE_UNKN)
#endif
{
if (num != -1)
{
if(info_ptr->unknown_chunks)
{
png_free(png_ptr, info_ptr->unknown_chunks[num].data);
info_ptr->unknown_chunks[num].data = NULL;
}
}
else
{
int i;
if(info_ptr->unknown_chunks_num)
{
for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++)
png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
png_free(png_ptr, info_ptr->unknown_chunks);
info_ptr->unknown_chunks = NULL;
info_ptr->unknown_chunks_num = 0;
}
}
}
#endif
#if defined(PNG_hIST_SUPPORTED)
/* free any hIST entry */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
#else
if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST))
#endif
{
png_free(png_ptr, info_ptr->hist);
info_ptr->hist = NULL;
info_ptr->valid &= ~PNG_INFO_hIST;
#ifndef PNG_FREE_ME_SUPPORTED
png_ptr->flags &= ~PNG_FLAG_FREE_HIST;
#endif
}
#endif
/* free any PLTE entry that was internally allocated */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
#else
if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE))
#endif
{
png_zfree(png_ptr, info_ptr->palette);
info_ptr->palette = NULL;
info_ptr->valid &= ~PNG_INFO_PLTE;
#ifndef PNG_FREE_ME_SUPPORTED
png_ptr->flags &= ~PNG_FLAG_FREE_PLTE;
#endif
info_ptr->num_palette = 0;
}
#if defined(PNG_INFO_IMAGE_SUPPORTED)
/* free any image bits attached to the info structure */
#ifdef PNG_FREE_ME_SUPPORTED
if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
#else
if (mask & PNG_FREE_ROWS)
#endif
{
if(info_ptr->row_pointers)
{
int row;
for (row = 0; row < (int)info_ptr->height; row++)
{
png_free(png_ptr, info_ptr->row_pointers[row]);
info_ptr->row_pointers[row]=NULL;
}
png_free(png_ptr, info_ptr->row_pointers);
info_ptr->row_pointers=NULL;
}
info_ptr->valid &= ~PNG_INFO_IDAT;
}
#endif
#ifdef PNG_FREE_ME_SUPPORTED
if(num == -1)
info_ptr->free_me &= ~mask;
else
info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL);
#endif
}
/* This is an internal routine to free any memory that the info struct is
* pointing to before re-using it or freeing the struct itself. Recall
* that png_free() checks for NULL pointers for us.
*/
void /* PRIVATE */
png_info_destroy(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_info_destroy\n");
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
if (png_ptr->num_chunk_list)
{
png_free(png_ptr, png_ptr->chunk_list);
png_ptr->chunk_list=NULL;
png_ptr->num_chunk_list=0;
}
#endif
png_info_init_3(&info_ptr, png_sizeof(png_info));
}
/* This function returns a pointer to the io_ptr associated with the user
* functions. The application should free any memory associated with this
* pointer before png_write_destroy() or png_read_destroy() are called.
*/
png_voidp PNGAPI
png_get_io_ptr(png_structp png_ptr)
{
return (png_ptr->io_ptr);
}
#if !defined(PNG_NO_STDIO)
/* Initialize the default input/output functions for the PNG file. If you
* use your own read or write routines, you can call either png_set_read_fn()
* or png_set_write_fn() instead of png_init_io(). If you have defined
* PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't
* necessarily available.
*/
void PNGAPI
png_init_io(png_structp png_ptr, png_FILE_p fp)
{
png_debug(1, "in png_init_io\n");
png_ptr->io_ptr = (png_voidp)fp;
}
#endif
#if defined(PNG_TIME_RFC1123_SUPPORTED)
/* Convert the supplied time into an RFC 1123 string suitable for use in
* a "Creation Time" or other text-based time string.
*/
png_charp PNGAPI
png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime)
{
static PNG_CONST char short_months[12][4] =
{"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
if (png_ptr->time_buffer == NULL)
{
png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29*
png_sizeof(char)));
}
#if defined(_WIN32_WCE)
{
wchar_t time_buf[29];
wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"),
ptime->day % 32, short_months[(ptime->month - 1) % 12],
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29,
NULL, NULL);
}
#else
#ifdef USE_FAR_KEYWORD
{
char near_time_buf[29];
sprintf(near_time_buf, "%d %s %d %02d:%02d:%02d +0000",
ptime->day % 32, short_months[(ptime->month - 1) % 12],
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
png_memcpy(png_ptr->time_buffer, near_time_buf,
29*png_sizeof(char));
}
#else
sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000",
ptime->day % 32, short_months[(ptime->month - 1) % 12],
ptime->year, ptime->hour % 24, ptime->minute % 60,
ptime->second % 61);
#endif
#endif /* _WIN32_WCE */
return ((png_charp)png_ptr->time_buffer);
}
#endif /* PNG_TIME_RFC1123_SUPPORTED */
#if 0
/* Signature string for a PNG file. */
png_bytep PNGAPI
png_sig_bytes(void)
{
return ((png_bytep)"\211\120\116\107\015\012\032\012");
}
#endif
png_charp PNGAPI
png_get_copyright(png_structp png_ptr)
{
if (&png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return ((png_charp) "\n libpng version 1.2.8 - December 3, 2004\n\
Copyright (c) 1998-2004 Glenn Randers-Pehrson\n\
Copyright (c) 1996-1997 Andreas Dilger\n\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n");
return ((png_charp) "");
}
/* The following return the library version as a short string in the
* format 1.0.0 through 99.99.99zz. To get the version of *.h files
* used with your application, print out PNG_LIBPNG_VER_STRING, which
* is defined in png.h.
* Note: now there is no difference between png_get_libpng_ver() and
* png_get_header_ver(). Due to the version_nn_nn_nn typedef guard,
* it is guaranteed that png.c uses the correct version of png.h.
*/
png_charp PNGAPI
png_get_libpng_ver(png_structp png_ptr)
{
/* Version of *.c files used when building libpng */
if (&png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return ((png_charp) PNG_LIBPNG_VER_STRING);
return ((png_charp) "");
}
png_charp PNGAPI
png_get_header_ver(png_structp png_ptr)
{
/* Version of *.h files used when building libpng */
if (&png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return ((png_charp) PNG_LIBPNG_VER_STRING);
return ((png_charp) "");
}
png_charp PNGAPI
png_get_header_version(png_structp png_ptr)
{
/* Returns longer string containing both version and date */
if (&png_ptr != NULL) /* silence compiler warning about unused png_ptr */
return ((png_charp) PNG_HEADER_VERSION_STRING);
return ((png_charp) "");
}
#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
int PNGAPI
png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name)
{
/* check chunk_name and return "keep" value if it's on the list, else 0 */
int i;
png_bytep p;
if((png_ptr == NULL && chunk_name == NULL) || png_ptr->num_chunk_list<=0)
return 0;
p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5;
for (i = png_ptr->num_chunk_list; i; i--, p-=5)
if (!png_memcmp(chunk_name, p, 4))
return ((int)*(p+4));
return 0;
}
#endif
/* This function, added to libpng-1.0.6g, is untested. */
int PNGAPI
png_reset_zstream(png_structp png_ptr)
{
return (inflateReset(&png_ptr->zstream));
}
/* This function was added to libpng-1.0.7 */
png_uint_32 PNGAPI
png_access_version_number(void)
{
/* Version of *.c files used when building libpng */
return((png_uint_32) PNG_LIBPNG_VER);
}
#if !defined(PNG_1_0_X)
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
/* this INTERNAL function was added to libpng 1.2.0 */
void /* PRIVATE */
png_init_mmx_flags (png_structp png_ptr)
{
png_ptr->mmx_rowbytes_threshold = 0;
png_ptr->mmx_bitdepth_threshold = 0;
# if (defined(PNG_USE_PNGVCRD) || defined(PNG_USE_PNGGCCRD))
png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_COMPILED;
if (png_mmx_support() > 0) {
png_ptr->asm_flags |= PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
# ifdef PNG_HAVE_ASSEMBLER_COMBINE_ROW
| PNG_ASM_FLAG_MMX_READ_COMBINE_ROW
# endif
# ifdef PNG_HAVE_ASSEMBLER_READ_INTERLACE
| PNG_ASM_FLAG_MMX_READ_INTERLACE
# endif
# ifndef PNG_HAVE_ASSEMBLER_READ_FILTER_ROW
;
# else
| PNG_ASM_FLAG_MMX_READ_FILTER_SUB
| PNG_ASM_FLAG_MMX_READ_FILTER_UP
| PNG_ASM_FLAG_MMX_READ_FILTER_AVG
| PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
png_ptr->mmx_rowbytes_threshold = PNG_MMX_ROWBYTES_THRESHOLD_DEFAULT;
png_ptr->mmx_bitdepth_threshold = PNG_MMX_BITDEPTH_THRESHOLD_DEFAULT;
# endif
} else {
png_ptr->asm_flags &= ~( PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU
| PNG_MMX_READ_FLAGS
| PNG_MMX_WRITE_FLAGS );
}
# else /* !((PNGVCRD || PNGGCCRD) && PNG_ASSEMBLER_CODE_SUPPORTED)) */
/* clear all MMX flags; no support is compiled in */
png_ptr->asm_flags &= ~( PNG_MMX_FLAGS );
# endif /* ?(PNGVCRD || PNGGCCRD) */
}
#endif /* !(PNG_ASSEMBLER_CODE_SUPPORTED) */
/* this function was added to libpng 1.2.0 */
#if !defined(PNG_USE_PNGGCCRD) && \
!(defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD))
int PNGAPI
png_mmx_support(void)
{
return -1;
}
#endif
#endif /* PNG_1_0_X */
#ifdef PNG_SIZE_T
/* Added at libpng version 1.2.6 */
PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
png_size_t PNGAPI
png_convert_size(size_t size)
{
if (size > (png_size_t)-1)
PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */
return ((png_size_t)size);
}
#endif /* PNG_SIZE_T */

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libpng/png.h
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libpng/pngconf.h
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libpng/pngerror.c
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/* pngerror.c - stub functions for i/o and memory allocation
*
* libpng version 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* This file provides a location for all error handling. Users who
* need special error handling are expected to write replacement functions
* and use png_set_error_fn() to use those functions. See the instructions
* at each function.
*/
#define PNG_INTERNAL
#include "png.h"
static void /* PRIVATE */
png_default_error PNGARG((png_structp png_ptr,
png_const_charp error_message));
static void /* PRIVATE */
png_default_warning PNGARG((png_structp png_ptr,
png_const_charp warning_message));
/* This function is called whenever there is a fatal error. This function
* should not be changed. If there is a need to handle errors differently,
* you should supply a replacement error function and use png_set_error_fn()
* to replace the error function at run-time.
*/
void PNGAPI
png_error(png_structp png_ptr, png_const_charp error_message)
{
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
char msg[16];
if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
{
if (*error_message == '#')
{
int offset;
for (offset=1; offset<15; offset++)
if (*(error_message+offset) == ' ')
break;
if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
{
int i;
for (i=0; i<offset-1; i++)
msg[i]=error_message[i+1];
msg[i]='\0';
error_message=msg;
}
else
error_message+=offset;
}
else
{
if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
{
msg[0]='0';
msg[1]='\0';
error_message=msg;
}
}
}
#endif
if (png_ptr != NULL && png_ptr->error_fn != NULL)
(*(png_ptr->error_fn))(png_ptr, error_message);
/* If the custom handler doesn't exist, or if it returns,
use the default handler, which will not return. */
png_default_error(png_ptr, error_message);
}
/* This function is called whenever there is a non-fatal error. This function
* should not be changed. If there is a need to handle warnings differently,
* you should supply a replacement warning function and use
* png_set_error_fn() to replace the warning function at run-time.
*/
void PNGAPI
png_warning(png_structp png_ptr, png_const_charp warning_message)
{
int offset = 0;
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (png_ptr->flags&(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
#endif
{
if (*warning_message == '#')
{
for (offset=1; offset<15; offset++)
if (*(warning_message+offset) == ' ')
break;
}
}
if (png_ptr != NULL && png_ptr->warning_fn != NULL)
(*(png_ptr->warning_fn))(png_ptr, warning_message+offset);
else
png_default_warning(png_ptr, warning_message+offset);
}
/* These utilities are used internally to build an error message that relates
* to the current chunk. The chunk name comes from png_ptr->chunk_name,
* this is used to prefix the message. The message is limited in length
* to 63 bytes, the name characters are output as hex digits wrapped in []
* if the character is invalid.
*/
#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97))
static PNG_CONST char png_digit[16] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'
};
static void /* PRIVATE */
png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
error_message)
{
int iout = 0, iin = 0;
while (iin < 4)
{
int c = png_ptr->chunk_name[iin++];
if (isnonalpha(c))
{
buffer[iout++] = '[';
buffer[iout++] = png_digit[(c & 0xf0) >> 4];
buffer[iout++] = png_digit[c & 0x0f];
buffer[iout++] = ']';
}
else
{
buffer[iout++] = (png_byte)c;
}
}
if (error_message == NULL)
buffer[iout] = 0;
else
{
buffer[iout++] = ':';
buffer[iout++] = ' ';
png_strncpy(buffer+iout, error_message, 63);
buffer[iout+63] = 0;
}
}
void PNGAPI
png_chunk_error(png_structp png_ptr, png_const_charp error_message)
{
char msg[18+64];
png_format_buffer(png_ptr, msg, error_message);
png_error(png_ptr, msg);
}
void PNGAPI
png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
{
char msg[18+64];
png_format_buffer(png_ptr, msg, warning_message);
png_warning(png_ptr, msg);
}
/* This is the default error handling function. Note that replacements for
* this function MUST NOT RETURN, or the program will likely crash. This
* function is used by default, or if the program supplies NULL for the
* error function pointer in png_set_error_fn().
*/
static void /* PRIVATE */
png_default_error(png_structp png_ptr, png_const_charp error_message)
{
#ifndef PNG_NO_CONSOLE_IO
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (*error_message == '#')
{
int offset;
char error_number[16];
for (offset=0; offset<15; offset++)
{
error_number[offset] = *(error_message+offset+1);
if (*(error_message+offset) == ' ')
break;
}
if((offset > 1) && (offset < 15))
{
error_number[offset-1]='\0';
fprintf(stderr, "libpng error no. %s: %s\n", error_number,
error_message+offset);
}
else
fprintf(stderr, "libpng error: %s, offset=%d\n", error_message,offset);
}
else
#endif
fprintf(stderr, "libpng error: %s\n", error_message);
#endif
#ifdef PNG_SETJMP_SUPPORTED
# ifdef USE_FAR_KEYWORD
{
jmp_buf jmpbuf;
png_memcpy(jmpbuf,png_ptr->jmpbuf,png_sizeof(jmp_buf));
longjmp(jmpbuf, 1);
}
# else
longjmp(png_ptr->jmpbuf, 1);
# endif
#else
/* make compiler happy */ ;
if (png_ptr)
PNG_ABORT();
#endif
#ifdef PNG_NO_CONSOLE_IO
/* make compiler happy */ ;
if (&error_message != NULL)
return;
#endif
}
/* This function is called when there is a warning, but the library thinks
* it can continue anyway. Replacement functions don't have to do anything
* here if you don't want them to. In the default configuration, png_ptr is
* not used, but it is passed in case it may be useful.
*/
static void /* PRIVATE */
png_default_warning(png_structp png_ptr, png_const_charp warning_message)
{
#ifndef PNG_NO_CONSOLE_IO
# ifdef PNG_ERROR_NUMBERS_SUPPORTED
if (*warning_message == '#')
{
int offset;
char warning_number[16];
for (offset=0; offset<15; offset++)
{
warning_number[offset]=*(warning_message+offset+1);
if (*(warning_message+offset) == ' ')
break;
}
if((offset > 1) && (offset < 15))
{
warning_number[offset-1]='\0';
fprintf(stderr, "libpng warning no. %s: %s\n", warning_number,
warning_message+offset);
}
else
fprintf(stderr, "libpng warning: %s\n", warning_message);
}
else
# endif
fprintf(stderr, "libpng warning: %s\n", warning_message);
#else
/* make compiler happy */ ;
if (warning_message)
return;
#endif
/* make compiler happy */ ;
if (png_ptr)
return;
}
/* This function is called when the application wants to use another method
* of handling errors and warnings. Note that the error function MUST NOT
* return to the calling routine or serious problems will occur. The return
* method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
*/
void PNGAPI
png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
png_error_ptr error_fn, png_error_ptr warning_fn)
{
png_ptr->error_ptr = error_ptr;
png_ptr->error_fn = error_fn;
png_ptr->warning_fn = warning_fn;
}
/* This function returns a pointer to the error_ptr associated with the user
* functions. The application should free any memory associated with this
* pointer before png_write_destroy and png_read_destroy are called.
*/
png_voidp PNGAPI
png_get_error_ptr(png_structp png_ptr)
{
return ((png_voidp)png_ptr->error_ptr);
}
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
void PNGAPI
png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
{
if(png_ptr != NULL)
{
png_ptr->flags &=
((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
}
}
#endif

934
libpng/pngget.c
View File

@ -1,934 +0,0 @@
/* pngget.c - retrieval of values from info struct
*
* libpng 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*/
#define PNG_INTERNAL
#include "png.h"
png_uint_32 PNGAPI
png_get_valid(png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->valid & flag);
else
return(0);
}
png_uint_32 PNGAPI
png_get_rowbytes(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->rowbytes);
else
return(0);
}
#if defined(PNG_INFO_IMAGE_SUPPORTED)
png_bytepp PNGAPI
png_get_rows(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->row_pointers);
else
return(0);
}
#endif
#ifdef PNG_EASY_ACCESS_SUPPORTED
/* easy access to info, added in libpng-0.99 */
png_uint_32 PNGAPI
png_get_image_width(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->width;
}
return (0);
}
png_uint_32 PNGAPI
png_get_image_height(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->height;
}
return (0);
}
png_byte PNGAPI
png_get_bit_depth(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->bit_depth;
}
return (0);
}
png_byte PNGAPI
png_get_color_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->color_type;
}
return (0);
}
png_byte PNGAPI
png_get_filter_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->filter_type;
}
return (0);
}
png_byte PNGAPI
png_get_interlace_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->interlace_type;
}
return (0);
}
png_byte PNGAPI
png_get_compression_type(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
{
return info_ptr->compression_type;
}
return (0);
}
png_uint_32 PNGAPI
png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter");
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
else return (info_ptr->x_pixels_per_unit);
}
#else
return (0);
#endif
return (0);
}
png_uint_32 PNGAPI
png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter");
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER)
return (0);
else return (info_ptr->y_pixels_per_unit);
}
#else
return (0);
#endif
return (0);
}
png_uint_32 PNGAPI
png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter");
if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER ||
info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit)
return (0);
else return (info_ptr->x_pixels_per_unit);
}
#else
return (0);
#endif
return (0);
}
#ifdef PNG_FLOATING_POINT_SUPPORTED
float PNGAPI
png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_pHYs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_pHYs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio");
if (info_ptr->x_pixels_per_unit == 0)
return ((float)0.0);
else
return ((float)((float)info_ptr->y_pixels_per_unit
/(float)info_ptr->x_pixels_per_unit));
}
#else
return (0.0);
#endif
return ((float)0.0);
}
#endif
png_int_32 PNGAPI
png_get_x_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
else return (info_ptr->x_offset);
}
#else
return (0);
#endif
return (0);
}
png_int_32 PNGAPI
png_get_y_offset_microns(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_MICROMETER)
return (0);
else return (info_ptr->y_offset);
}
#else
return (0);
#endif
return (0);
}
png_int_32 PNGAPI
png_get_x_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_x_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
else return (info_ptr->x_offset);
}
#else
return (0);
#endif
return (0);
}
png_int_32 PNGAPI
png_get_y_offset_pixels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
#if defined(PNG_oFFs_SUPPORTED)
if (info_ptr->valid & PNG_INFO_oFFs)
{
png_debug1(1, "in %s retrieval function\n", "png_get_y_offset_microns");
if(info_ptr->offset_unit_type != PNG_OFFSET_PIXEL)
return (0);
else return (info_ptr->y_offset);
}
#else
return (0);
#endif
return (0);
}
#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
png_uint_32 PNGAPI
png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{
return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr)
*.0254 +.5));
}
png_uint_32 PNGAPI
png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{
return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr)
*.0254 +.5));
}
png_uint_32 PNGAPI
png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr)
{
return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr)
*.0254 +.5));
}
float PNGAPI
png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr)
{
return ((float)png_get_x_offset_microns(png_ptr, info_ptr)
*.00003937);
}
float PNGAPI
png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr)
{
return ((float)png_get_y_offset_microns(png_ptr, info_ptr)
*.00003937);
}
#if defined(PNG_pHYs_SUPPORTED)
png_uint_32 PNGAPI
png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
{
png_uint_32 retval = 0;
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function\n", "pHYs");
if (res_x != NULL)
{
*res_x = info_ptr->x_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
if (res_y != NULL)
{
*res_y = info_ptr->y_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
if (unit_type != NULL)
{
*unit_type = (int)info_ptr->phys_unit_type;
retval |= PNG_INFO_pHYs;
if(*unit_type == 1)
{
if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50);
if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50);
}
}
}
return (retval);
}
#endif /* PNG_pHYs_SUPPORTED */
#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */
/* png_get_channels really belongs in here, too, but it's been around longer */
#endif /* PNG_EASY_ACCESS_SUPPORTED */
png_byte PNGAPI
png_get_channels(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->channels);
else
return (0);
}
png_bytep PNGAPI
png_get_signature(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr != NULL && info_ptr != NULL)
return(info_ptr->signature);
else
return (NULL);
}
#if defined(PNG_bKGD_SUPPORTED)
png_uint_32 PNGAPI
png_get_bKGD(png_structp png_ptr, png_infop info_ptr,
png_color_16p *background)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)
&& background != NULL)
{
png_debug1(1, "in %s retrieval function\n", "bKGD");
*background = &(info_ptr->background);
return (PNG_INFO_bKGD);
}
return (0);
}
#endif
#if defined(PNG_cHRM_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cHRM(png_structp png_ptr, png_infop info_ptr,
double *white_x, double *white_y, double *red_x, double *red_y,
double *green_x, double *green_y, double *blue_x, double *blue_y)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
{
png_debug1(1, "in %s retrieval function\n", "cHRM");
if (white_x != NULL)
*white_x = (double)info_ptr->x_white;
if (white_y != NULL)
*white_y = (double)info_ptr->y_white;
if (red_x != NULL)
*red_x = (double)info_ptr->x_red;
if (red_y != NULL)
*red_y = (double)info_ptr->y_red;
if (green_x != NULL)
*green_x = (double)info_ptr->x_green;
if (green_y != NULL)
*green_y = (double)info_ptr->y_green;
if (blue_x != NULL)
*blue_x = (double)info_ptr->x_blue;
if (blue_y != NULL)
*blue_y = (double)info_ptr->y_blue;
return (PNG_INFO_cHRM);
}
return (0);
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x,
png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y,
png_fixed_point *blue_x, png_fixed_point *blue_y)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM))
{
png_debug1(1, "in %s retrieval function\n", "cHRM");
if (white_x != NULL)
*white_x = info_ptr->int_x_white;
if (white_y != NULL)
*white_y = info_ptr->int_y_white;
if (red_x != NULL)
*red_x = info_ptr->int_x_red;
if (red_y != NULL)
*red_y = info_ptr->int_y_red;
if (green_x != NULL)
*green_x = info_ptr->int_x_green;
if (green_y != NULL)
*green_y = info_ptr->int_y_green;
if (blue_x != NULL)
*blue_x = info_ptr->int_x_blue;
if (blue_y != NULL)
*blue_y = info_ptr->int_y_blue;
return (PNG_INFO_cHRM);
}
return (0);
}
#endif
#endif
#if defined(PNG_gAMA_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
&& file_gamma != NULL)
{
png_debug1(1, "in %s retrieval function\n", "gAMA");
*file_gamma = (double)info_ptr->gamma;
return (PNG_INFO_gAMA);
}
return (0);
}
#endif
#ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_gAMA_fixed(png_structp png_ptr, png_infop info_ptr,
png_fixed_point *int_file_gamma)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)
&& int_file_gamma != NULL)
{
png_debug1(1, "in %s retrieval function\n", "gAMA");
*int_file_gamma = info_ptr->int_gamma;
return (PNG_INFO_gAMA);
}
return (0);
}
#endif
#endif
#if defined(PNG_sRGB_SUPPORTED)
png_uint_32 PNGAPI
png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)
&& file_srgb_intent != NULL)
{
png_debug1(1, "in %s retrieval function\n", "sRGB");
*file_srgb_intent = (int)info_ptr->srgb_intent;
return (PNG_INFO_sRGB);
}
return (0);
}
#endif
#if defined(PNG_iCCP_SUPPORTED)
png_uint_32 PNGAPI
png_get_iCCP(png_structp png_ptr, png_infop info_ptr,
png_charpp name, int *compression_type,
png_charpp profile, png_uint_32 *proflen)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)
&& name != NULL && profile != NULL && proflen != NULL)
{
png_debug1(1, "in %s retrieval function\n", "iCCP");
*name = info_ptr->iccp_name;
*profile = info_ptr->iccp_profile;
/* compression_type is a dummy so the API won't have to change
if we introduce multiple compression types later. */
*proflen = (int)info_ptr->iccp_proflen;
*compression_type = (int)info_ptr->iccp_compression;
return (PNG_INFO_iCCP);
}
return (0);
}
#endif
#if defined(PNG_sPLT_SUPPORTED)
png_uint_32 PNGAPI
png_get_sPLT(png_structp png_ptr, png_infop info_ptr,
png_sPLT_tpp spalettes)
{
if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
*spalettes = info_ptr->splt_palettes;
return ((png_uint_32)info_ptr->splt_palettes_num);
}
#endif
#if defined(PNG_hIST_SUPPORTED)
png_uint_32 PNGAPI
png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)
&& hist != NULL)
{
png_debug1(1, "in %s retrieval function\n", "hIST");
*hist = info_ptr->hist;
return (PNG_INFO_hIST);
}
return (0);
}
#endif
png_uint_32 PNGAPI
png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *width, png_uint_32 *height, int *bit_depth,
int *color_type, int *interlace_type, int *compression_type,
int *filter_type)
{
if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL &&
bit_depth != NULL && color_type != NULL)
{
png_debug1(1, "in %s retrieval function\n", "IHDR");
*width = info_ptr->width;
*height = info_ptr->height;
*bit_depth = info_ptr->bit_depth;
if (info_ptr->bit_depth < 1 || info_ptr->bit_depth > 16)
png_error(png_ptr, "Invalid bit depth");
*color_type = info_ptr->color_type;
if (info_ptr->color_type > 6)
png_error(png_ptr, "Invalid color type");
if (compression_type != NULL)
*compression_type = info_ptr->compression_type;
if (filter_type != NULL)
*filter_type = info_ptr->filter_type;
if (interlace_type != NULL)
*interlace_type = info_ptr->interlace_type;
/* check for potential overflow of rowbytes */
if (*width == 0 || *width > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image width");
if (*height == 0 || *height > PNG_UINT_31_MAX)
png_error(png_ptr, "Invalid image height");
if (info_ptr->width > (PNG_UINT_32_MAX
>> 3) /* 8-byte RGBA pixels */
- 64 /* bigrowbuf hack */
- 1 /* filter byte */
- 7*8 /* rounding of width to multiple of 8 pixels */
- 8) /* extra max_pixel_depth pad */
{
png_warning(png_ptr,
"Width too large for libpng to process image data.");
}
return (1);
}
return (0);
}
#if defined(PNG_oFFs_SUPPORTED)
png_uint_32 PNGAPI
png_get_oFFs(png_structp png_ptr, png_infop info_ptr,
png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)
&& offset_x != NULL && offset_y != NULL && unit_type != NULL)
{
png_debug1(1, "in %s retrieval function\n", "oFFs");
*offset_x = info_ptr->x_offset;
*offset_y = info_ptr->y_offset;
*unit_type = (int)info_ptr->offset_unit_type;
return (PNG_INFO_oFFs);
}
return (0);
}
#endif
#if defined(PNG_pCAL_SUPPORTED)
png_uint_32 PNGAPI
png_get_pCAL(png_structp png_ptr, png_infop info_ptr,
png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
png_charp *units, png_charpp *params)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)
&& purpose != NULL && X0 != NULL && X1 != NULL && type != NULL &&
nparams != NULL && units != NULL && params != NULL)
{
png_debug1(1, "in %s retrieval function\n", "pCAL");
*purpose = info_ptr->pcal_purpose;
*X0 = info_ptr->pcal_X0;
*X1 = info_ptr->pcal_X1;
*type = (int)info_ptr->pcal_type;
*nparams = (int)info_ptr->pcal_nparams;
*units = info_ptr->pcal_units;
*params = info_ptr->pcal_params;
return (PNG_INFO_pCAL);
}
return (0);
}
#endif
#if defined(PNG_sCAL_SUPPORTED)
#ifdef PNG_FLOATING_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_sCAL(png_structp png_ptr, png_infop info_ptr,
int *unit, double *width, double *height)
{
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_sCAL))
{
*unit = info_ptr->scal_unit;
*width = info_ptr->scal_pixel_width;
*height = info_ptr->scal_pixel_height;
return (PNG_INFO_sCAL);
}
return(0);
}
#else
#ifdef PNG_FIXED_POINT_SUPPORTED
png_uint_32 PNGAPI
png_get_sCAL_s(png_structp png_ptr, png_infop info_ptr,
int *unit, png_charpp width, png_charpp height)
{
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_sCAL))
{
*unit = info_ptr->scal_unit;
*width = info_ptr->scal_s_width;
*height = info_ptr->scal_s_height;
return (PNG_INFO_sCAL);
}
return(0);
}
#endif
#endif
#endif
#if defined(PNG_pHYs_SUPPORTED)
png_uint_32 PNGAPI
png_get_pHYs(png_structp png_ptr, png_infop info_ptr,
png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)
{
png_uint_32 retval = 0;
if (png_ptr != NULL && info_ptr != NULL &&
(info_ptr->valid & PNG_INFO_pHYs))
{
png_debug1(1, "in %s retrieval function\n", "pHYs");
if (res_x != NULL)
{
*res_x = info_ptr->x_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
if (res_y != NULL)
{
*res_y = info_ptr->y_pixels_per_unit;
retval |= PNG_INFO_pHYs;
}
if (unit_type != NULL)
{
*unit_type = (int)info_ptr->phys_unit_type;
retval |= PNG_INFO_pHYs;
}
}
return (retval);
}
#endif
png_uint_32 PNGAPI
png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette,
int *num_palette)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE)
&& palette != NULL)
{
png_debug1(1, "in %s retrieval function\n", "PLTE");
*palette = info_ptr->palette;
*num_palette = info_ptr->num_palette;
png_debug1(3, "num_palette = %d\n", *num_palette);
return (PNG_INFO_PLTE);
}
return (0);
}
#if defined(PNG_sBIT_SUPPORTED)
png_uint_32 PNGAPI
png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)
&& sig_bit != NULL)
{
png_debug1(1, "in %s retrieval function\n", "sBIT");
*sig_bit = &(info_ptr->sig_bit);
return (PNG_INFO_sBIT);
}
return (0);
}
#endif
#if defined(PNG_TEXT_SUPPORTED)
png_uint_32 PNGAPI
png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr,
int *num_text)
{
if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
{
png_debug1(1, "in %s retrieval function\n",
(png_ptr->chunk_name[0] == '\0' ? "text"
: (png_const_charp)png_ptr->chunk_name));
if (text_ptr != NULL)
*text_ptr = info_ptr->text;
if (num_text != NULL)
*num_text = info_ptr->num_text;
return ((png_uint_32)info_ptr->num_text);
}
if (num_text != NULL)
*num_text = 0;
return(0);
}
#endif
#if defined(PNG_tIME_SUPPORTED)
png_uint_32 PNGAPI
png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)
{
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)
&& mod_time != NULL)
{
png_debug1(1, "in %s retrieval function\n", "tIME");
*mod_time = &(info_ptr->mod_time);
return (PNG_INFO_tIME);
}
return (0);
}
#endif
#if defined(PNG_tRNS_SUPPORTED)
png_uint_32 PNGAPI
png_get_tRNS(png_structp png_ptr, png_infop info_ptr,
png_bytep *trans, int *num_trans, png_color_16p *trans_values)
{
png_uint_32 retval = 0;
if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS))
{
png_debug1(1, "in %s retrieval function\n", "tRNS");
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
if (trans != NULL)
{
*trans = info_ptr->trans;
retval |= PNG_INFO_tRNS;
}
if (trans_values != NULL)
*trans_values = &(info_ptr->trans_values);
}
else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */
{
if (trans_values != NULL)
{
*trans_values = &(info_ptr->trans_values);
retval |= PNG_INFO_tRNS;
}
if(trans != NULL)
*trans = NULL;
}
if(num_trans != NULL)
{
*num_trans = info_ptr->num_trans;
retval |= PNG_INFO_tRNS;
}
}
return (retval);
}
#endif
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
png_uint_32 PNGAPI
png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
png_unknown_chunkpp unknowns)
{
if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
*unknowns = info_ptr->unknown_chunks;
return ((png_uint_32)info_ptr->unknown_chunks_num);
}
#endif
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
png_byte PNGAPI
png_get_rgb_to_gray_status (png_structp png_ptr)
{
return (png_byte)(png_ptr? png_ptr->rgb_to_gray_status : 0);
}
#endif
#if defined(PNG_USER_CHUNKS_SUPPORTED)
png_voidp PNGAPI
png_get_user_chunk_ptr(png_structp png_ptr)
{
return (png_ptr? png_ptr->user_chunk_ptr : NULL);
}
#endif
#ifdef PNG_WRITE_SUPPORTED
png_uint_32 PNGAPI
png_get_compression_buffer_size(png_structp png_ptr)
{
return (png_uint_32)(png_ptr? png_ptr->zbuf_size : 0L);
}
#endif
#ifndef PNG_1_0_X
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
/* this function was added to libpng 1.2.0 and should exist by default */
png_uint_32 PNGAPI
png_get_asm_flags (png_structp png_ptr)
{
return (png_uint_32)(png_ptr? png_ptr->asm_flags : 0L);
}
/* this function was added to libpng 1.2.0 and should exist by default */
png_uint_32 PNGAPI
png_get_asm_flagmask (int flag_select)
{
png_uint_32 settable_asm_flags = 0;
if (flag_select & PNG_SELECT_READ)
settable_asm_flags |=
PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
PNG_ASM_FLAG_MMX_READ_INTERLACE |
PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
PNG_ASM_FLAG_MMX_READ_FILTER_UP |
PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
/* no non-MMX flags yet */
#if 0
/* GRR: no write-flags yet, either, but someday... */
if (flag_select & PNG_SELECT_WRITE)
settable_asm_flags |=
PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
#endif /* 0 */
return settable_asm_flags; /* _theoretically_ settable capabilities only */
}
#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
/* GRR: could add this: && defined(PNG_MMX_CODE_SUPPORTED) */
/* this function was added to libpng 1.2.0 */
png_uint_32 PNGAPI
png_get_mmx_flagmask (int flag_select, int *compilerID)
{
png_uint_32 settable_mmx_flags = 0;
if (flag_select & PNG_SELECT_READ)
settable_mmx_flags |=
PNG_ASM_FLAG_MMX_READ_COMBINE_ROW |
PNG_ASM_FLAG_MMX_READ_INTERLACE |
PNG_ASM_FLAG_MMX_READ_FILTER_SUB |
PNG_ASM_FLAG_MMX_READ_FILTER_UP |
PNG_ASM_FLAG_MMX_READ_FILTER_AVG |
PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ;
#if 0
/* GRR: no MMX write support yet, but someday... */
if (flag_select & PNG_SELECT_WRITE)
settable_mmx_flags |=
PNG_ASM_FLAG_MMX_WRITE_ [whatever] ;
#endif /* 0 */
if (compilerID != NULL) {
#ifdef PNG_USE_PNGVCRD
*compilerID = 1; /* MSVC */
#else
#ifdef PNG_USE_PNGGCCRD
*compilerID = 2; /* gcc/gas */
#else
*compilerID = -1; /* unknown (i.e., no asm/MMX code compiled) */
#endif
#endif
}
return settable_mmx_flags; /* _theoretically_ settable capabilities only */
}
/* this function was added to libpng 1.2.0 */
png_byte PNGAPI
png_get_mmx_bitdepth_threshold (png_structp png_ptr)
{
return (png_byte)(png_ptr? png_ptr->mmx_bitdepth_threshold : 0);
}
/* this function was added to libpng 1.2.0 */
png_uint_32 PNGAPI
png_get_mmx_rowbytes_threshold (png_structp png_ptr)
{
return (png_uint_32)(png_ptr? png_ptr->mmx_rowbytes_threshold : 0L);
}
#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* these functions were added to libpng 1.2.6 */
png_uint_32 PNGAPI
png_get_user_width_max (png_structp png_ptr)
{
return (png_ptr? png_ptr->user_width_max : 0);
}
png_uint_32 PNGAPI
png_get_user_height_max (png_structp png_ptr)
{
return (png_ptr? png_ptr->user_height_max : 0);
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
#endif /* ?PNG_1_0_X */

595
libpng/pngmem.c
View File

@ -1,595 +0,0 @@
/* pngmem.c - stub functions for memory allocation
*
* libpng version 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* This file provides a location for all memory allocation. Users who
* need special memory handling are expected to supply replacement
* functions for png_malloc() and png_free(), and to use
* png_create_read_struct_2() and png_create_write_struct_2() to
* identify the replacement functions.
*/
#define PNG_INTERNAL
#include "png.h"
/* Borland DOS special memory handler */
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
/* if you change this, be sure to change the one in png.h also */
/* Allocate memory for a png_struct. The malloc and memset can be replaced
by a single call to calloc() if this is thought to improve performance. */
png_voidp /* PRIVATE */
png_create_struct(int type)
{
#ifdef PNG_USER_MEM_SUPPORTED
return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
}
/* Alternate version of png_create_struct, for use with user-defined malloc. */
png_voidp /* PRIVATE */
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
{
#endif /* PNG_USER_MEM_SUPPORTED */
png_size_t size;
png_voidp struct_ptr;
if (type == PNG_STRUCT_INFO)
size = png_sizeof(png_info);
else if (type == PNG_STRUCT_PNG)
size = png_sizeof(png_struct);
else
return (png_get_copyright(NULL));
#ifdef PNG_USER_MEM_SUPPORTED
if(malloc_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(png_ptr, (png_uint_32)size);
}
else
#endif /* PNG_USER_MEM_SUPPORTED */
struct_ptr = (png_voidp)farmalloc(size);
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
return (struct_ptr);
}
/* Free memory allocated by a png_create_struct() call */
void /* PRIVATE */
png_destroy_struct(png_voidp struct_ptr)
{
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
}
/* Free memory allocated by a png_create_struct() call */
void /* PRIVATE */
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
png_voidp mem_ptr)
{
#endif
if (struct_ptr != NULL)
{
#ifdef PNG_USER_MEM_SUPPORTED
if(free_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
(*(free_fn))(png_ptr, struct_ptr);
return;
}
#endif /* PNG_USER_MEM_SUPPORTED */
farfree (struct_ptr);
}
}
/* Allocate memory. For reasonable files, size should never exceed
* 64K. However, zlib may allocate more then 64K if you don't tell
* it not to. See zconf.h and png.h for more information. zlib does
* need to allocate exactly 64K, so whatever you call here must
* have the ability to do that.
*
* Borland seems to have a problem in DOS mode for exactly 64K.
* It gives you a segment with an offset of 8 (perhaps to store its
* memory stuff). zlib doesn't like this at all, so we have to
* detect and deal with it. This code should not be needed in
* Windows or OS/2 modes, and only in 16 bit mode. This code has
* been updated by Alexander Lehmann for version 0.89 to waste less
* memory.
*
* Note that we can't use png_size_t for the "size" declaration,
* since on some systems a png_size_t is a 16-bit quantity, and as a
* result, we would be truncating potentially larger memory requests
* (which should cause a fatal error) and introducing major problems.
*/
png_voidp PNGAPI
png_malloc(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
if (png_ptr == NULL || size == 0)
return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
if(png_ptr->malloc_fn != NULL)
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
else
ret = (png_malloc_default(png_ptr, size));
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of memory!");
return (ret);
}
png_voidp PNGAPI
png_malloc_default(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
#endif /* PNG_USER_MEM_SUPPORTED */
#ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
{
png_warning(png_ptr, "Cannot Allocate > 64K");
ret = NULL;
}
else
#endif
if (size != (size_t)size)
ret = NULL;
else if (size == (png_uint_32)65536L)
{
if (png_ptr->offset_table == NULL)
{
/* try to see if we need to do any of this fancy stuff */
ret = farmalloc(size);
if (ret == NULL || ((png_size_t)ret & 0xffff))
{
int num_blocks;
png_uint_32 total_size;
png_bytep table;
int i;
png_byte huge * hptr;
if (ret != NULL)
{
farfree(ret);
ret = NULL;
}
if(png_ptr->zlib_window_bits > 14)
num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14));
else
num_blocks = 1;
if (png_ptr->zlib_mem_level >= 7)
num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7));
else
num_blocks++;
total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16;
table = farmalloc(total_size);
if (table == NULL)
{
#ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */
else
png_warning(png_ptr, "Out Of Memory.");
#endif
return (NULL);
}
if ((png_size_t)table & 0xfff0)
{
#ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr,
"Farmalloc didn't return normalized pointer");
else
png_warning(png_ptr,
"Farmalloc didn't return normalized pointer");
#endif
return (NULL);
}
png_ptr->offset_table = table;
png_ptr->offset_table_ptr = farmalloc(num_blocks *
png_sizeof (png_bytep));
if (png_ptr->offset_table_ptr == NULL)
{
#ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out Of memory."); /* Note "O" and "M" */
else
png_warning(png_ptr, "Out Of memory.");
#endif
return (NULL);
}
hptr = (png_byte huge *)table;
if ((png_size_t)hptr & 0xf)
{
hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L);
hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */
}
for (i = 0; i < num_blocks; i++)
{
png_ptr->offset_table_ptr[i] = (png_bytep)hptr;
hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */
}
png_ptr->offset_table_number = num_blocks;
png_ptr->offset_table_count = 0;
png_ptr->offset_table_count_free = 0;
}
}
if (png_ptr->offset_table_count >= png_ptr->offset_table_number)
{
#ifndef PNG_USER_MEM_SUPPORTED
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory."); /* Note "o" and "M" */
else
png_warning(png_ptr, "Out of Memory.");
#endif
return (NULL);
}
ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++];
}
else
ret = farmalloc(size);
#ifndef PNG_USER_MEM_SUPPORTED
if (ret == NULL)
{
if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */
else
png_warning(png_ptr, "Out of memory."); /* Note "o" and "m" */
}
#endif
return (ret);
}
/* free a pointer allocated by png_malloc(). In the default
configuration, png_ptr is not used, but is passed in case it
is needed. If ptr is NULL, return without taking any action. */
void PNGAPI
png_free(png_structp png_ptr, png_voidp ptr)
{
if (png_ptr == NULL || ptr == NULL)
return;
#ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr->free_fn != NULL)
{
(*(png_ptr->free_fn))(png_ptr, ptr);
return;
}
else png_free_default(png_ptr, ptr);
}
void PNGAPI
png_free_default(png_structp png_ptr, png_voidp ptr)
{
#endif /* PNG_USER_MEM_SUPPORTED */
if (png_ptr->offset_table != NULL)
{
int i;
for (i = 0; i < png_ptr->offset_table_count; i++)
{
if (ptr == png_ptr->offset_table_ptr[i])
{
ptr = NULL;
png_ptr->offset_table_count_free++;
break;
}
}
if (png_ptr->offset_table_count_free == png_ptr->offset_table_count)
{
farfree(png_ptr->offset_table);
farfree(png_ptr->offset_table_ptr);
png_ptr->offset_table = NULL;
png_ptr->offset_table_ptr = NULL;
}
}
if (ptr != NULL)
{
farfree(ptr);
}
}
#else /* Not the Borland DOS special memory handler */
/* Allocate memory for a png_struct or a png_info. The malloc and
memset can be replaced by a single call to calloc() if this is thought
to improve performance noticably. */
png_voidp /* PRIVATE */
png_create_struct(int type)
{
#ifdef PNG_USER_MEM_SUPPORTED
return (png_create_struct_2(type, png_malloc_ptr_NULL, png_voidp_NULL));
}
/* Allocate memory for a png_struct or a png_info. The malloc and
memset can be replaced by a single call to calloc() if this is thought
to improve performance noticably. */
png_voidp /* PRIVATE */
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
{
#endif /* PNG_USER_MEM_SUPPORTED */
png_size_t size;
png_voidp struct_ptr;
if (type == PNG_STRUCT_INFO)
size = png_sizeof(png_info);
else if (type == PNG_STRUCT_PNG)
size = png_sizeof(png_struct);
else
return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
if(malloc_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(png_ptr, size);
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
return (struct_ptr);
}
#endif /* PNG_USER_MEM_SUPPORTED */
#if defined(__TURBOC__) && !defined(__FLAT__)
struct_ptr = (png_voidp)farmalloc(size);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
struct_ptr = (png_voidp)halloc(size,1);
# else
struct_ptr = (png_voidp)malloc(size);
# endif
#endif
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
return (struct_ptr);
}
/* Free memory allocated by a png_create_struct() call */
void /* PRIVATE */
png_destroy_struct(png_voidp struct_ptr)
{
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2(struct_ptr, png_free_ptr_NULL, png_voidp_NULL);
}
/* Free memory allocated by a png_create_struct() call */
void /* PRIVATE */
png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
png_voidp mem_ptr)
{
#endif /* PNG_USER_MEM_SUPPORTED */
if (struct_ptr != NULL)
{
#ifdef PNG_USER_MEM_SUPPORTED
if(free_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
(*(free_fn))(png_ptr, struct_ptr);
return;
}
#endif /* PNG_USER_MEM_SUPPORTED */
#if defined(__TURBOC__) && !defined(__FLAT__)
farfree(struct_ptr);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
hfree(struct_ptr);
# else
free(struct_ptr);
# endif
#endif
}
}
/* Allocate memory. For reasonable files, size should never exceed
64K. However, zlib may allocate more then 64K if you don't tell
it not to. See zconf.h and png.h for more information. zlib does
need to allocate exactly 64K, so whatever you call here must
have the ability to do that. */
png_voidp PNGAPI
png_malloc(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
#ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr == NULL || size == 0)
return (NULL);
if(png_ptr->malloc_fn != NULL)
ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size));
else
ret = (png_malloc_default(png_ptr, size));
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory!");
return (ret);
}
png_voidp PNGAPI
png_malloc_default(png_structp png_ptr, png_uint_32 size)
{
png_voidp ret;
#endif /* PNG_USER_MEM_SUPPORTED */
if (png_ptr == NULL || size == 0)
return (NULL);
#ifdef PNG_MAX_MALLOC_64K
if (size > (png_uint_32)65536L)
{
#ifndef PNG_USER_MEM_SUPPORTED
if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Cannot Allocate > 64K");
else
#endif
return NULL;
}
#endif
/* Check for overflow */
#if defined(__TURBOC__) && !defined(__FLAT__)
if (size != (unsigned long)size)
ret = NULL;
else
ret = farmalloc(size);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
if (size != (unsigned long)size)
ret = NULL;
else
ret = halloc(size, 1);
# else
if (size != (size_t)size)
ret = NULL;
else
ret = malloc((size_t)size);
# endif
#endif
#ifndef PNG_USER_MEM_SUPPORTED
if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0)
png_error(png_ptr, "Out of Memory");
#endif
return (ret);
}
/* Free a pointer allocated by png_malloc(). If ptr is NULL, return
without taking any action. */
void PNGAPI
png_free(png_structp png_ptr, png_voidp ptr)
{
if (png_ptr == NULL || ptr == NULL)
return;
#ifdef PNG_USER_MEM_SUPPORTED
if (png_ptr->free_fn != NULL)
{
(*(png_ptr->free_fn))(png_ptr, ptr);
return;
}
else png_free_default(png_ptr, ptr);
}
void PNGAPI
png_free_default(png_structp png_ptr, png_voidp ptr)
{
if (png_ptr == NULL || ptr == NULL)
return;
#endif /* PNG_USER_MEM_SUPPORTED */
#if defined(__TURBOC__) && !defined(__FLAT__)
farfree(ptr);
#else
# if defined(_MSC_VER) && defined(MAXSEG_64K)
hfree(ptr);
# else
free(ptr);
# endif
#endif
}
#endif /* Not Borland DOS special memory handler */
#if defined(PNG_1_0_X)
# define png_malloc_warn png_malloc
#else
/* This function was added at libpng version 1.2.3. The png_malloc_warn()
* function will set up png_malloc() to issue a png_warning and return NULL
* instead of issuing a png_error, if it fails to allocate the requested
* memory.
*/
png_voidp PNGAPI
png_malloc_warn(png_structp png_ptr, png_uint_32 size)
{
png_voidp ptr;
png_uint_32 save_flags=png_ptr->flags;
png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK;
ptr = (png_voidp)png_malloc((png_structp)png_ptr, size);
png_ptr->flags=save_flags;
return(ptr);
}
#endif
png_voidp PNGAPI
png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2,
png_uint_32 length)
{
png_size_t size;
size = (png_size_t)length;
if ((png_uint_32)size != length)
png_error(png_ptr,"Overflow in png_memcpy_check.");
return(png_memcpy (s1, s2, size));
}
png_voidp PNGAPI
png_memset_check (png_structp png_ptr, png_voidp s1, int value,
png_uint_32 length)
{
png_size_t size;
size = (png_size_t)length;
if ((png_uint_32)size != length)
png_error(png_ptr,"Overflow in png_memset_check.");
return (png_memset (s1, value, size));
}
#ifdef PNG_USER_MEM_SUPPORTED
/* This function is called when the application wants to use another method
* of allocating and freeing memory.
*/
void PNGAPI
png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr
malloc_fn, png_free_ptr free_fn)
{
png_ptr->mem_ptr = mem_ptr;
png_ptr->malloc_fn = malloc_fn;
png_ptr->free_fn = free_fn;
}
/* This function returns a pointer to the mem_ptr associated with the user
* functions. The application should free any memory associated with this
* pointer before png_write_destroy and png_read_destroy are called.
*/
png_voidp PNGAPI
png_get_mem_ptr(png_structp png_ptr)
{
return ((png_voidp)png_ptr->mem_ptr);
}
#endif /* PNG_USER_MEM_SUPPORTED */

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libpng/pngpread.c
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libpng/pngread.c
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libpng/pngrio.c
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/* pngrio.c - functions for data input
*
* libpng 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* This file provides a location for all input. Users who need
* special handling are expected to write a function that has the same
* arguments as this and performs a similar function, but that possibly
* has a different input method. Note that you shouldn't change this
* function, but rather write a replacement function and then make
* libpng use it at run time with png_set_read_fn(...).
*/
#define PNG_INTERNAL
#include "png.h"
/* Read the data from whatever input you are using. The default routine
reads from a file pointer. Note that this routine sometimes gets called
with very small lengths, so you should implement some kind of simple
buffering if you are using unbuffered reads. This should never be asked
to read more then 64K on a 16 bit machine. */
void /* PRIVATE */
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_debug1(4,"reading %d bytes\n", (int)length);
if (png_ptr->read_data_fn != NULL)
(*(png_ptr->read_data_fn))(png_ptr, data, length);
else
png_error(png_ptr, "Call to NULL read function");
}
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual reading of data. If you are
not reading from a standard C stream, you should create a replacement
read_data function and use it at run time with png_set_read_fn(), rather
than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_size_t check;
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
* instead of an int, which is what fread() actually returns.
*/
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = (png_size_t)fread(data, (png_size_t)1, length,
(png_FILE_p)png_ptr->io_ptr);
#endif
if (check != length)
png_error(png_ptr, "Read Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
*/
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
static void /* PRIVATE */
png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
int check;
png_byte *n_data;
png_FILE_p io_ptr;
/* Check if data really is near. If so, use usual code. */
n_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
if ((png_bytep)n_data == data)
{
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = fread(n_data, 1, length, io_ptr);
#endif
}
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t read, remaining, err;
check = 0;
remaining = length;
do
{
read = MIN(NEAR_BUF_SIZE, remaining);
#if defined(_WIN32_WCE)
if ( !ReadFile((HANDLE)(io_ptr), buf, read, &err, NULL) )
err = 0;
#else
err = fread(buf, (png_size_t)1, read, io_ptr);
#endif
png_memcpy(data, buf, read); /* copy far buffer to near buffer */
if(err != read)
break;
else
check += err;
data += read;
remaining -= read;
}
while (remaining != 0);
}
if ((png_uint_32)check != (png_uint_32)length)
png_error(png_ptr, "read Error");
}
#endif
#endif
/* This function allows the application to supply a new input function
for libpng if standard C streams aren't being used.
This function takes as its arguments:
png_ptr - pointer to a png input data structure
io_ptr - pointer to user supplied structure containing info about
the input functions. May be NULL.
read_data_fn - pointer to a new input function that takes as its
arguments a pointer to a png_struct, a pointer to
a location where input data can be stored, and a 32-bit
unsigned int that is the number of bytes to be read.
To exit and output any fatal error messages the new write
function should call png_error(png_ptr, "Error msg"). */
void PNGAPI
png_set_read_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr read_data_fn)
{
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (read_data_fn != NULL)
png_ptr->read_data_fn = read_data_fn;
else
png_ptr->read_data_fn = png_default_read_data;
#else
png_ptr->read_data_fn = read_data_fn;
#endif
/* It is an error to write to a read device */
if (png_ptr->write_data_fn != NULL)
{
png_ptr->write_data_fn = NULL;
png_warning(png_ptr,
"It's an error to set both read_data_fn and write_data_fn in the ");
png_warning(png_ptr,
"same structure. Resetting write_data_fn to NULL.");
}
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
png_ptr->output_flush_fn = NULL;
#endif
}

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libpng/pngrtran.c
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libpng/pngrutil.c
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libpng/pngset.c
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libpng/pngtrans.c
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/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
* libpng 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*/
#define PNG_INTERNAL
#include "png.h"
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* turn on BGR-to-RGB mapping */
void PNGAPI
png_set_bgr(png_structp png_ptr)
{
png_debug(1, "in png_set_bgr\n");
png_ptr->transformations |= PNG_BGR;
}
#endif
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
/* turn on 16 bit byte swapping */
void PNGAPI
png_set_swap(png_structp png_ptr)
{
png_debug(1, "in png_set_swap\n");
if (png_ptr->bit_depth == 16)
png_ptr->transformations |= PNG_SWAP_BYTES;
}
#endif
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
/* turn on pixel packing */
void PNGAPI
png_set_packing(png_structp png_ptr)
{
png_debug(1, "in png_set_packing\n");
if (png_ptr->bit_depth < 8)
{
png_ptr->transformations |= PNG_PACK;
png_ptr->usr_bit_depth = 8;
}
}
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
/* turn on packed pixel swapping */
void PNGAPI
png_set_packswap(png_structp png_ptr)
{
png_debug(1, "in png_set_packswap\n");
if (png_ptr->bit_depth < 8)
png_ptr->transformations |= PNG_PACKSWAP;
}
#endif
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
void PNGAPI
png_set_shift(png_structp png_ptr, png_color_8p true_bits)
{
png_debug(1, "in png_set_shift\n");
png_ptr->transformations |= PNG_SHIFT;
png_ptr->shift = *true_bits;
}
#endif
#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
defined(PNG_WRITE_INTERLACING_SUPPORTED)
int PNGAPI
png_set_interlace_handling(png_structp png_ptr)
{
png_debug(1, "in png_set_interlace handling\n");
if (png_ptr->interlaced)
{
png_ptr->transformations |= PNG_INTERLACE;
return (7);
}
return (1);
}
#endif
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
/* Add a filler byte on read, or remove a filler or alpha byte on write.
* The filler type has changed in v0.95 to allow future 2-byte fillers
* for 48-bit input data, as well as to avoid problems with some compilers
* that don't like bytes as parameters.
*/
void PNGAPI
png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc)
{
png_debug(1, "in png_set_filler\n");
png_ptr->transformations |= PNG_FILLER;
png_ptr->filler = (png_byte)filler;
if (filler_loc == PNG_FILLER_AFTER)
png_ptr->flags |= PNG_FLAG_FILLER_AFTER;
else
png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER;
/* This should probably go in the "do_read_filler" routine.
* I attempted to do that in libpng-1.0.1a but that caused problems
* so I restored it in libpng-1.0.2a
*/
if (png_ptr->color_type == PNG_COLOR_TYPE_RGB)
{
png_ptr->usr_channels = 4;
}
/* Also I added this in libpng-1.0.2a (what happens when we expand
* a less-than-8-bit grayscale to GA? */
if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8)
{
png_ptr->usr_channels = 2;
}
}
#if !defined(PNG_1_0_X)
/* Added to libpng-1.2.7 */
void PNGAPI
png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc)
{
png_debug(1, "in png_set_add_alpha\n");
png_set_filler(png_ptr, filler, filler_loc);
png_ptr->transformations |= PNG_ADD_ALPHA;
}
#endif
#endif
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
void PNGAPI
png_set_swap_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_swap_alpha\n");
png_ptr->transformations |= PNG_SWAP_ALPHA;
}
#endif
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
void PNGAPI
png_set_invert_alpha(png_structp png_ptr)
{
png_debug(1, "in png_set_invert_alpha\n");
png_ptr->transformations |= PNG_INVERT_ALPHA;
}
#endif
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
void PNGAPI
png_set_invert_mono(png_structp png_ptr)
{
png_debug(1, "in png_set_invert_mono\n");
png_ptr->transformations |= PNG_INVERT_MONO;
}
/* invert monochrome grayscale data */
void /* PRIVATE */
png_do_invert(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_invert\n");
/* This test removed from libpng version 1.0.13 and 1.2.0:
* if (row_info->bit_depth == 1 &&
*/
#if defined(PNG_USELESS_TESTS_SUPPORTED)
if (row == NULL || row_info == NULL)
return;
#endif
if (row_info->color_type == PNG_COLOR_TYPE_GRAY)
{
png_bytep rp = row;
png_uint_32 i;
png_uint_32 istop = row_info->rowbytes;
for (i = 0; i < istop; i++)
{
*rp = (png_byte)(~(*rp));
rp++;
}
}
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
row_info->bit_depth == 8)
{
png_bytep rp = row;
png_uint_32 i;
png_uint_32 istop = row_info->rowbytes;
for (i = 0; i < istop; i+=2)
{
*rp = (png_byte)(~(*rp));
rp+=2;
}
}
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
row_info->bit_depth == 16)
{
png_bytep rp = row;
png_uint_32 i;
png_uint_32 istop = row_info->rowbytes;
for (i = 0; i < istop; i+=4)
{
*rp = (png_byte)(~(*rp));
*(rp+1) = (png_byte)(~(*(rp+1)));
rp+=4;
}
}
}
#endif
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
/* swaps byte order on 16 bit depth images */
void /* PRIVATE */
png_do_swap(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_swap\n");
if (
#if defined(PNG_USELESS_TESTS_SUPPORTED)
row != NULL && row_info != NULL &&
#endif
row_info->bit_depth == 16)
{
png_bytep rp = row;
png_uint_32 i;
png_uint_32 istop= row_info->width * row_info->channels;
for (i = 0; i < istop; i++, rp += 2)
{
png_byte t = *rp;
*rp = *(rp + 1);
*(rp + 1) = t;
}
}
}
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED)
static png_byte onebppswaptable[256] = {
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
};
static png_byte twobppswaptable[256] = {
0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,
0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,
0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,
0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4,
0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8,
0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8,
0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC,
0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC,
0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1,
0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1,
0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5,
0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5,
0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9,
0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9,
0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD,
0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD,
0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2,
0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2,
0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6,
0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6,
0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA,
0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA,
0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE,
0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE,
0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3,
0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3,
0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7,
0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7,
0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB,
0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB,
0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF,
0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF
};
static png_byte fourbppswaptable[256] = {
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,
0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,
0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1,
0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,
0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2,
0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,
0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3,
0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,
0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4,
0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,
0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5,
0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,
0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6,
0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,
0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7,
0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,
0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8,
0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,
0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9,
0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A,
0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA,
0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B,
0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB,
0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C,
0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC,
0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D,
0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD,
0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E,
0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE,
0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F,
0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF
};
/* swaps pixel packing order within bytes */
void /* PRIVATE */
png_do_packswap(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_packswap\n");
if (
#if defined(PNG_USELESS_TESTS_SUPPORTED)
row != NULL && row_info != NULL &&
#endif
row_info->bit_depth < 8)
{
png_bytep rp, end, table;
end = row + row_info->rowbytes;
if (row_info->bit_depth == 1)
table = onebppswaptable;
else if (row_info->bit_depth == 2)
table = twobppswaptable;
else if (row_info->bit_depth == 4)
table = fourbppswaptable;
else
return;
for (rp = row; rp < end; rp++)
*rp = table[*rp];
}
}
#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */
#if defined(PNG_WRITE_FILLER_SUPPORTED) || \
defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
/* remove filler or alpha byte(s) */
void /* PRIVATE */
png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags)
{
png_debug(1, "in png_do_strip_filler\n");
#if defined(PNG_USELESS_TESTS_SUPPORTED)
if (row != NULL && row_info != NULL)
#endif
{
png_bytep sp=row;
png_bytep dp=row;
png_uint_32 row_width=row_info->width;
png_uint_32 i;
if ((row_info->color_type == PNG_COLOR_TYPE_RGB ||
(row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA &&
(flags & PNG_FLAG_STRIP_ALPHA))) &&
row_info->channels == 4)
{
if (row_info->bit_depth == 8)
{
/* This converts from RGBX or RGBA to RGB */
if (flags & PNG_FLAG_FILLER_AFTER)
{
dp+=3; sp+=4;
for (i = 1; i < row_width; i++)
{
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
sp++;
}
}
/* This converts from XRGB or ARGB to RGB */
else
{
for (i = 0; i < row_width; i++)
{
sp++;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
}
}
row_info->pixel_depth = 24;
row_info->rowbytes = row_width * 3;
}
else /* if (row_info->bit_depth == 16) */
{
if (flags & PNG_FLAG_FILLER_AFTER)
{
/* This converts from RRGGBBXX or RRGGBBAA to RRGGBB */
sp += 8; dp += 6;
for (i = 1; i < row_width; i++)
{
/* This could be (although png_memcpy is probably slower):
png_memcpy(dp, sp, 6);
sp += 8;
dp += 6;
*/
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
sp += 2;
}
}
else
{
/* This converts from XXRRGGBB or AARRGGBB to RRGGBB */
for (i = 0; i < row_width; i++)
{
/* This could be (although png_memcpy is probably slower):
png_memcpy(dp, sp, 6);
sp += 8;
dp += 6;
*/
sp+=2;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
*dp++ = *sp++;
}
}
row_info->pixel_depth = 48;
row_info->rowbytes = row_width * 6;
}
row_info->channels = 3;
}
else if ((row_info->color_type == PNG_COLOR_TYPE_GRAY ||
(row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA &&
(flags & PNG_FLAG_STRIP_ALPHA))) &&
row_info->channels == 2)
{
if (row_info->bit_depth == 8)
{
/* This converts from GX or GA to G */
if (flags & PNG_FLAG_FILLER_AFTER)
{
for (i = 0; i < row_width; i++)
{
*dp++ = *sp++;
sp++;
}
}
/* This converts from XG or AG to G */
else
{
for (i = 0; i < row_width; i++)
{
sp++;
*dp++ = *sp++;
}
}
row_info->pixel_depth = 8;
row_info->rowbytes = row_width;
}
else /* if (row_info->bit_depth == 16) */
{
if (flags & PNG_FLAG_FILLER_AFTER)
{
/* This converts from GGXX or GGAA to GG */
sp += 4; dp += 2;
for (i = 1; i < row_width; i++)
{
*dp++ = *sp++;
*dp++ = *sp++;
sp += 2;
}
}
else
{
/* This converts from XXGG or AAGG to GG */
for (i = 0; i < row_width; i++)
{
sp += 2;
*dp++ = *sp++;
*dp++ = *sp++;
}
}
row_info->pixel_depth = 16;
row_info->rowbytes = row_width * 2;
}
row_info->channels = 1;
}
if (flags & PNG_FLAG_STRIP_ALPHA)
row_info->color_type &= ~PNG_COLOR_MASK_ALPHA;
}
}
#endif
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
/* swaps red and blue bytes within a pixel */
void /* PRIVATE */
png_do_bgr(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_bgr\n");
if (
#if defined(PNG_USELESS_TESTS_SUPPORTED)
row != NULL && row_info != NULL &&
#endif
(row_info->color_type & PNG_COLOR_MASK_COLOR))
{
png_uint_32 row_width = row_info->width;
if (row_info->bit_depth == 8)
{
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
{
png_bytep rp;
png_uint_32 i;
for (i = 0, rp = row; i < row_width; i++, rp += 3)
{
png_byte save = *rp;
*rp = *(rp + 2);
*(rp + 2) = save;
}
}
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
png_bytep rp;
png_uint_32 i;
for (i = 0, rp = row; i < row_width; i++, rp += 4)
{
png_byte save = *rp;
*rp = *(rp + 2);
*(rp + 2) = save;
}
}
}
else if (row_info->bit_depth == 16)
{
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
{
png_bytep rp;
png_uint_32 i;
for (i = 0, rp = row; i < row_width; i++, rp += 6)
{
png_byte save = *rp;
*rp = *(rp + 4);
*(rp + 4) = save;
save = *(rp + 1);
*(rp + 1) = *(rp + 5);
*(rp + 5) = save;
}
}
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
png_bytep rp;
png_uint_32 i;
for (i = 0, rp = row; i < row_width; i++, rp += 8)
{
png_byte save = *rp;
*rp = *(rp + 4);
*(rp + 4) = save;
save = *(rp + 1);
*(rp + 1) = *(rp + 5);
*(rp + 5) = save;
}
}
}
}
}
#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_LEGACY_SUPPORTED)
void PNGAPI
png_set_user_transform_info(png_structp png_ptr, png_voidp
user_transform_ptr, int user_transform_depth, int user_transform_channels)
{
png_debug(1, "in png_set_user_transform_info\n");
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
png_ptr->user_transform_ptr = user_transform_ptr;
png_ptr->user_transform_depth = (png_byte)user_transform_depth;
png_ptr->user_transform_channels = (png_byte)user_transform_channels;
#else
if(user_transform_ptr || user_transform_depth || user_transform_channels)
png_warning(png_ptr,
"This version of libpng does not support user transform info");
#endif
}
#endif
/* This function returns a pointer to the user_transform_ptr associated with
* the user transform functions. The application should free any memory
* associated with this pointer before png_write_destroy and png_read_destroy
* are called.
*/
png_voidp PNGAPI
png_get_user_transform_ptr(png_structp png_ptr)
{
#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
return ((png_voidp)png_ptr->user_transform_ptr);
#else
if(png_ptr)
return (NULL);
return (NULL);
#endif
}

3903
libpng/pngvcrd.c
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libpng/pngwio.c
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/* pngwio.c - functions for data output
*
* libpng 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* This file provides a location for all output. Users who need
* special handling are expected to write functions that have the same
* arguments as these and perform similar functions, but that possibly
* use different output methods. Note that you shouldn't change these
* functions, but rather write replacement functions and then change
* them at run time with png_set_write_fn(...).
*/
#define PNG_INTERNAL
#include "png.h"
#ifdef PNG_WRITE_SUPPORTED
/* Write the data to whatever output you are using. The default routine
writes to a file pointer. Note that this routine sometimes gets called
with very small lengths, so you should implement some kind of simple
buffering if you are using unbuffered writes. This should never be asked
to write more than 64K on a 16 bit machine. */
void /* PRIVATE */
png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
if (png_ptr->write_data_fn != NULL )
(*(png_ptr->write_data_fn))(png_ptr, data, length);
else
png_error(png_ptr, "Call to NULL write function");
}
#if !defined(PNG_NO_STDIO)
/* This is the function that does the actual writing of data. If you are
not writing to a standard C stream, you should create a replacement
write_data function and use it at run time with png_set_write_fn(), rather
than changing the library. */
#ifndef USE_FAR_KEYWORD
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
#if defined(_WIN32_WCE)
if ( !WriteFile((HANDLE)(png_ptr->io_ptr), data, length, &check, NULL) )
check = 0;
#else
check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
#endif
if (check != length)
png_error(png_ptr, "Write Error");
}
#else
/* this is the model-independent version. Since the standard I/O library
can't handle far buffers in the medium and small models, we have to copy
the data.
*/
#define NEAR_BUF_SIZE 1024
#define MIN(a,b) (a <= b ? a : b)
void PNGAPI
png_default_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
png_uint_32 check;
png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
png_FILE_p io_ptr;
/* Check if data really is near. If so, use usual code. */
near_data = (png_byte *)CVT_PTR_NOCHECK(data);
io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
if ((png_bytep)near_data == data)
{
#if defined(_WIN32_WCE)
if ( !WriteFile(io_ptr, near_data, length, &check, NULL) )
check = 0;
#else
check = fwrite(near_data, 1, length, io_ptr);
#endif
}
else
{
png_byte buf[NEAR_BUF_SIZE];
png_size_t written, remaining, err;
check = 0;
remaining = length;
do
{
written = MIN(NEAR_BUF_SIZE, remaining);
png_memcpy(buf, data, written); /* copy far buffer to near buffer */
#if defined(_WIN32_WCE)
if ( !WriteFile(io_ptr, buf, written, &err, NULL) )
err = 0;
#else
err = fwrite(buf, 1, written, io_ptr);
#endif
if (err != written)
break;
else
check += err;
data += written;
remaining -= written;
}
while (remaining != 0);
}
if (check != length)
png_error(png_ptr, "Write Error");
}
#endif
#endif
/* This function is called to output any data pending writing (normally
to disk). After png_flush is called, there should be no data pending
writing in any buffers. */
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
void /* PRIVATE */
png_flush(png_structp png_ptr)
{
if (png_ptr->output_flush_fn != NULL)
(*(png_ptr->output_flush_fn))(png_ptr);
}
#if !defined(PNG_NO_STDIO)
void PNGAPI
png_default_flush(png_structp png_ptr)
{
#if !defined(_WIN32_WCE)
png_FILE_p io_ptr;
io_ptr = (png_FILE_p)CVT_PTR((png_ptr->io_ptr));
if (io_ptr != NULL)
fflush(io_ptr);
#endif
}
#endif
#endif
/* This function allows the application to supply new output functions for
libpng if standard C streams aren't being used.
This function takes as its arguments:
png_ptr - pointer to a png output data structure
io_ptr - pointer to user supplied structure containing info about
the output functions. May be NULL.
write_data_fn - pointer to a new output function that takes as its
arguments a pointer to a png_struct, a pointer to
data to be written, and a 32-bit unsigned int that is
the number of bytes to be written. The new write
function should call png_error(png_ptr, "Error msg")
to exit and output any fatal error messages.
flush_data_fn - pointer to a new flush function that takes as its
arguments a pointer to a png_struct. After a call to
the flush function, there should be no data in any buffers
or pending transmission. If the output method doesn't do
any buffering of ouput, a function prototype must still be
supplied although it doesn't have to do anything. If
PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile
time, output_flush_fn will be ignored, although it must be
supplied for compatibility. */
void PNGAPI
png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)
{
png_ptr->io_ptr = io_ptr;
#if !defined(PNG_NO_STDIO)
if (write_data_fn != NULL)
png_ptr->write_data_fn = write_data_fn;
else
png_ptr->write_data_fn = png_default_write_data;
#else
png_ptr->write_data_fn = write_data_fn;
#endif
#if defined(PNG_WRITE_FLUSH_SUPPORTED)
#if !defined(PNG_NO_STDIO)
if (output_flush_fn != NULL)
png_ptr->output_flush_fn = output_flush_fn;
else
png_ptr->output_flush_fn = png_default_flush;
#else
png_ptr->output_flush_fn = output_flush_fn;
#endif
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */
if (png_ptr->read_data_fn != NULL)
{
png_ptr->read_data_fn = NULL;
png_warning(png_ptr,
"Attempted to set both read_data_fn and write_data_fn in");
png_warning(png_ptr,
"the same structure. Resetting read_data_fn to NULL.");
}
}
#if defined(USE_FAR_KEYWORD)
#if defined(_MSC_VER)
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;
FP_OFF(near_ptr) = FP_OFF(ptr);
far_ptr = (void FAR *)near_ptr;
if(check != 0)
if(FP_SEG(ptr) != FP_SEG(far_ptr))
png_error(png_ptr,"segment lost in conversion");
return(near_ptr);
}
# else
void *png_far_to_near(png_structp png_ptr,png_voidp ptr, int check)
{
void *near_ptr;
void FAR *far_ptr;
near_ptr = (void FAR *)ptr;
far_ptr = (void FAR *)near_ptr;
if(check != 0)
if(far_ptr != ptr)
png_error(png_ptr,"segment lost in conversion");
return(near_ptr);
}
# endif
# endif
#endif /* PNG_WRITE_SUPPORTED */

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libpng/pngwrite.c
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libpng/pngwtran.c
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/* pngwtran.c - transforms the data in a row for PNG writers
*
* libpng version 1.2.8 - December 3, 2004
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2004 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*/
#define PNG_INTERNAL
#include "png.h"
#ifdef PNG_WRITE_SUPPORTED
/* Transform the data according to the user's wishes. The order of
* transformations is significant.
*/
void /* PRIVATE */
png_do_write_transformations(png_structp png_ptr)
{
png_debug(1, "in png_do_write_transformations\n");
if (png_ptr == NULL)
return;
#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
if(png_ptr->write_user_transform_fn != NULL)
(*(png_ptr->write_user_transform_fn)) /* user write transform function */
(png_ptr, /* png_ptr */
&(png_ptr->row_info), /* row_info: */
/* png_uint_32 width; width of row */
/* png_uint_32 rowbytes; number of bytes in row */
/* png_byte color_type; color type of pixels */
/* png_byte bit_depth; bit depth of samples */
/* png_byte channels; number of channels (1-4) */
/* png_byte pixel_depth; bits per pixel (depth*channels) */
png_ptr->row_buf + 1); /* start of pixel data for row */
#endif
#if defined(PNG_WRITE_FILLER_SUPPORTED)
if (png_ptr->transformations & PNG_FILLER)
png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1,
png_ptr->flags);
#endif
#if defined(PNG_WRITE_PACKSWAP_SUPPORTED)
if (png_ptr->transformations & PNG_PACKSWAP)
png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
#if defined(PNG_WRITE_PACK_SUPPORTED)
if (png_ptr->transformations & PNG_PACK)
png_do_pack(&(png_ptr->row_info), png_ptr->row_buf + 1,
(png_uint_32)png_ptr->bit_depth);
#endif
#if defined(PNG_WRITE_SWAP_SUPPORTED)
if (png_ptr->transformations & PNG_SWAP_BYTES)
png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
#if defined(PNG_WRITE_SHIFT_SUPPORTED)
if (png_ptr->transformations & PNG_SHIFT)
png_do_shift(&(png_ptr->row_info), png_ptr->row_buf + 1,
&(png_ptr->shift));
#endif
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
if (png_ptr->transformations & PNG_INVERT_ALPHA)
png_do_write_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
if (png_ptr->transformations & PNG_SWAP_ALPHA)
png_do_write_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
#if defined(PNG_WRITE_BGR_SUPPORTED)
if (png_ptr->transformations & PNG_BGR)
png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
#if defined(PNG_WRITE_INVERT_SUPPORTED)
if (png_ptr->transformations & PNG_INVERT_MONO)
png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1);
#endif
}
#if defined(PNG_WRITE_PACK_SUPPORTED)
/* Pack pixels into bytes. Pass the true bit depth in bit_depth. The
* row_info bit depth should be 8 (one pixel per byte). The channels
* should be 1 (this only happens on grayscale and paletted images).
*/
void /* PRIVATE */
png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)
{
png_debug(1, "in png_do_pack\n");
if (row_info->bit_depth == 8 &&
#if defined(PNG_USELESS_TESTS_SUPPORTED)
row != NULL && row_info != NULL &&
#endif
row_info->channels == 1)
{
switch ((int)bit_depth)
{
case 1:
{
png_bytep sp, dp;
int mask, v;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
sp = row;
dp = row;
mask = 0x80;
v = 0;
for (i = 0; i < row_width; i++)
{
if (*sp != 0)
v |= mask;
sp++;
if (mask > 1)
mask >>= 1;
else
{
mask = 0x80;
*dp = (png_byte)v;
dp++;
v = 0;
}
}
if (mask != 0x80)
*dp = (png_byte)v;
break;
}
case 2:
{
png_bytep sp, dp;
int shift, v;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
sp = row;
dp = row;
shift = 6;
v = 0;
for (i = 0; i < row_width; i++)
{
png_byte value;
value = (png_byte)(*sp & 0x03);
v |= (value << shift);
if (shift == 0)
{
shift = 6;
*dp = (png_byte)v;
dp++;
v = 0;
}
else
shift -= 2;
sp++;
}
if (shift != 6)
*dp = (png_byte)v;
break;
}
case 4:
{
png_bytep sp, dp;
int shift, v;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
sp = row;
dp = row;
shift = 4;
v = 0;
for (i = 0; i < row_width; i++)
{
png_byte value;
value = (png_byte)(*sp & 0x0f);
v |= (value << shift);
if (shift == 0)
{
shift = 4;
*dp = (png_byte)v;
dp++;
v = 0;
}
else
shift -= 4;
sp++;
}
if (shift != 4)
*dp = (png_byte)v;
break;
}
}
row_info->bit_depth = (png_byte)bit_depth;
row_info->pixel_depth = (png_byte)(bit_depth * row_info->channels);
row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,
row_info->width);
}
}
#endif
#if defined(PNG_WRITE_SHIFT_SUPPORTED)
/* Shift pixel values to take advantage of whole range. Pass the
* true number of bits in bit_depth. The row should be packed
* according to row_info->bit_depth. Thus, if you had a row of
* bit depth 4, but the pixels only had values from 0 to 7, you
* would pass 3 as bit_depth, and this routine would translate the
* data to 0 to 15.
*/
void /* PRIVATE */
png_do_shift(png_row_infop row_info, png_bytep row, png_color_8p bit_depth)
{
png_debug(1, "in png_do_shift\n");
#if defined(PNG_USELESS_TESTS_SUPPORTED)
if (row != NULL && row_info != NULL &&
#else
if (
#endif
row_info->color_type != PNG_COLOR_TYPE_PALETTE)
{
int shift_start[4], shift_dec[4];
int channels = 0;
if (row_info->color_type & PNG_COLOR_MASK_COLOR)
{
shift_start[channels] = row_info->bit_depth - bit_depth->red;
shift_dec[channels] = bit_depth->red;
channels++;
shift_start[channels] = row_info->bit_depth - bit_depth->green;
shift_dec[channels] = bit_depth->green;
channels++;
shift_start[channels] = row_info->bit_depth - bit_depth->blue;
shift_dec[channels] = bit_depth->blue;
channels++;
}
else
{
shift_start[channels] = row_info->bit_depth - bit_depth->gray;
shift_dec[channels] = bit_depth->gray;
channels++;
}
if (row_info->color_type & PNG_COLOR_MASK_ALPHA)
{
shift_start[channels] = row_info->bit_depth - bit_depth->alpha;
shift_dec[channels] = bit_depth->alpha;
channels++;
}
/* with low row depths, could only be grayscale, so one channel */
if (row_info->bit_depth < 8)
{
png_bytep bp = row;
png_uint_32 i;
png_byte mask;
png_uint_32 row_bytes = row_info->rowbytes;
if (bit_depth->gray == 1 && row_info->bit_depth == 2)
mask = 0x55;
else if (row_info->bit_depth == 4 && bit_depth->gray == 3)
mask = 0x11;
else
mask = 0xff;
for (i = 0; i < row_bytes; i++, bp++)
{
png_uint_16 v;
int j;
v = *bp;
*bp = 0;
for (j = shift_start[0]; j > -shift_dec[0]; j -= shift_dec[0])
{
if (j > 0)
*bp |= (png_byte)((v << j) & 0xff);
else
*bp |= (png_byte)((v >> (-j)) & mask);
}
}
}
else if (row_info->bit_depth == 8)
{
png_bytep bp = row;
png_uint_32 i;
png_uint_32 istop = channels * row_info->width;
for (i = 0; i < istop; i++, bp++)
{
png_uint_16 v;
int j;
int c = (int)(i%channels);
v = *bp;
*bp = 0;
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
{
if (j > 0)
*bp |= (png_byte)((v << j) & 0xff);
else
*bp |= (png_byte)((v >> (-j)) & 0xff);
}
}
}
else
{
png_bytep bp;
png_uint_32 i;
png_uint_32 istop = channels * row_info->width;
for (bp = row, i = 0; i < istop; i++)
{
int c = (int)(i%channels);
png_uint_16 value, v;
int j;
v = (png_uint_16)(((png_uint_16)(*bp) << 8) + *(bp + 1));
value = 0;
for (j = shift_start[c]; j > -shift_dec[c]; j -= shift_dec[c])
{
if (j > 0)
value |= (png_uint_16)((v << j) & (png_uint_16)0xffff);
else
value |= (png_uint_16)((v >> (-j)) & (png_uint_16)0xffff);
}
*bp++ = (png_byte)(value >> 8);
*bp++ = (png_byte)(value & 0xff);
}
}
}
}
#endif
#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
void /* PRIVATE */
png_do_write_swap_alpha(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_write_swap_alpha\n");
#if defined(PNG_USELESS_TESTS_SUPPORTED)
if (row != NULL && row_info != NULL)
#endif
{
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
/* This converts from ARGB to RGBA */
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
png_byte save = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = save;
}
}
/* This converts from AARRGGBB to RRGGBBAA */
else
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
png_byte save[2];
save[0] = *(sp++);
save[1] = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = save[0];
*(dp++) = save[1];
}
}
}
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
/* This converts from AG to GA */
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
png_byte save = *(sp++);
*(dp++) = *(sp++);
*(dp++) = save;
}
}
/* This converts from AAGG to GGAA */
else
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
png_byte save[2];
save[0] = *(sp++);
save[1] = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = save[0];
*(dp++) = save[1];
}
}
}
}
}
#endif
#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
void /* PRIVATE */
png_do_write_invert_alpha(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_write_invert_alpha\n");
#if defined(PNG_USELESS_TESTS_SUPPORTED)
if (row != NULL && row_info != NULL)
#endif
{
if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
{
/* This inverts the alpha channel in RGBA */
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = (png_byte)(255 - *(sp++));
}
}
/* This inverts the alpha channel in RRGGBBAA */
else
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = (png_byte)(255 - *(sp++));
*(dp++) = (png_byte)(255 - *(sp++));
}
}
}
else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
{
/* This inverts the alpha channel in GA */
if (row_info->bit_depth == 8)
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
*(dp++) = *(sp++);
*(dp++) = (png_byte)(255 - *(sp++));
}
}
/* This inverts the alpha channel in GGAA */
else
{
png_bytep sp, dp;
png_uint_32 i;
png_uint_32 row_width = row_info->width;
for (i = 0, sp = dp = row; i < row_width; i++)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);
*(dp++) = (png_byte)(255 - *(sp++));
*(dp++) = (png_byte)(255 - *(sp++));
}
}
}
}
}
#endif
#if defined(PNG_MNG_FEATURES_SUPPORTED)
/* undoes intrapixel differencing */
void /* PRIVATE */
png_do_write_intrapixel(png_row_infop row_info, png_bytep row)
{
png_debug(1, "in png_do_write_intrapixel\n");
if (
#if defined(PNG_USELESS_TESTS_SUPPORTED)
row != NULL && row_info != NULL &&
#endif
(row_info->color_type & PNG_COLOR_MASK_COLOR))
{
int bytes_per_pixel;
png_uint_32 row_width = row_info->width;
if (row_info->bit_depth == 8)
{
png_bytep rp;
png_uint_32 i;
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
bytes_per_pixel = 3;
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
bytes_per_pixel = 4;
else
return;
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
{
*(rp) = (png_byte)((*rp - *(rp+1))&0xff);
*(rp+2) = (png_byte)((*(rp+2) - *(rp+1))&0xff);
}
}
else if (row_info->bit_depth == 16)
{
png_bytep rp;
png_uint_32 i;
if (row_info->color_type == PNG_COLOR_TYPE_RGB)
bytes_per_pixel = 6;
else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
bytes_per_pixel = 8;
else
return;
for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel)
{
png_uint_32 s0 = (*(rp ) << 8) | *(rp+1);
png_uint_32 s1 = (*(rp+2) << 8) | *(rp+3);
png_uint_32 s2 = (*(rp+4) << 8) | *(rp+5);
png_uint_32 red = (png_uint_32)((s0-s1) & 0xffffL);
png_uint_32 blue = (png_uint_32)((s2-s1) & 0xffffL);
*(rp ) = (png_byte)((red >> 8) & 0xff);
*(rp+1) = (png_byte)(red & 0xff);
*(rp+4) = (png_byte)((blue >> 8) & 0xff);
*(rp+5) = (png_byte)(blue & 0xff);
}
}
}
}
#endif /* PNG_MNG_FEATURES_SUPPORTED */
#endif /* PNG_WRITE_SUPPORTED */

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/* getopt_long and getopt_long_only entry points for GNU getopt.
Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98
Free Software Foundation, Inc.
NOTE: This source is derived from an old version taken from the GNU C
Library (glibc).
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "getopt.h"
#if !defined __STDC__ || !__STDC__
/* This is a separate conditional since some stdc systems
reject `defined (const)'. */
#ifndef const
#define const
#endif
#endif
#include <stdio.h>
/* Comment out all this code if we are using the GNU C Library, and are not
actually compiling the library itself. This code is part of the GNU C
Library, but also included in many other GNU distributions. Compiling
and linking in this code is a waste when using the GNU C library
(especially if it is a shared library). Rather than having every GNU
program understand `configure --with-gnu-libc' and omit the object files,
it is simpler to just do this in the source for each such file. */
#define GETOPT_INTERFACE_VERSION 2
#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
#include <gnu-versions.h>
#if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
#define ELIDE_CODE
#endif
#endif
#ifndef ELIDE_CODE
/* This needs to come after some library #include
to get __GNU_LIBRARY__ defined. */
#ifdef __GNU_LIBRARY__
#include <stdlib.h>
#endif
#ifndef NULL
#define NULL 0
#endif
int
getopt_long (argc, argv, options, long_options, opt_index)
int argc;
char *const *argv;
const char *options;
const struct option *long_options;
int *opt_index;
{
return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
}
/* Like getopt_long, but '-' as well as '--' can indicate a long option.
If an option that starts with '-' (not '--') doesn't match a long option,
but does match a short option, it is parsed as a short option
instead. */
int
getopt_long_only (argc, argv, options, long_options, opt_index)
int argc;
char *const *argv;
const char *options;
const struct option *long_options;
int *opt_index;
{
return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
}
#endif /* Not ELIDE_CODE. */
#ifdef TEST
#include <stdio.h>
int
main (argc, argv)
int argc;
char **argv;
{
int c;
int digit_optind = 0;
while (1)
{
int this_option_optind = optind ? optind : 1;
int option_index = 0;
static struct option long_options[] =
{
{"add", 1, 0, 0},
{"append", 0, 0, 0},
{"delete", 1, 0, 0},
{"verbose", 0, 0, 0},
{"create", 0, 0, 0},
{"file", 1, 0, 0},
{0, 0, 0, 0}
};
c = getopt_long (argc, argv, "abc:d:0123456789",
long_options, &option_index);
if (c == -1)
break;
switch (c)
{
case 0:
printf ("option %s", long_options[option_index].name);
if (optarg)
printf (" with arg %s", optarg);
printf ("\n");
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (digit_optind != 0 && digit_optind != this_option_optind)
printf ("digits occur in two different argv-elements.\n");
digit_optind = this_option_optind;
printf ("option %c\n", c);
break;
case 'a':
printf ("option a\n");
break;
case 'b':
printf ("option b\n");
break;
case 'c':
printf ("option c with value `%s'\n", optarg);
break;
case 'd':
printf ("option d with value `%s'\n", optarg);
break;
case '?':
break;
default:
printf ("?? getopt returned character code 0%o ??\n", c);
}
}
if (optind < argc)
{
printf ("non-option ARGV-elements: ");
while (optind < argc)
printf ("%s ", argv[optind++]);
printf ("\n");
}
exit (0);
}
#endif /* TEST */