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dolphin/Externals/wxWidgets/src/common/xpmdecod.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: src/common/xpmdecod.cpp
// Purpose: wxXPMDecoder
// Author: John Cristy, Vaclav Slavik
// RCS-ID: $Id: xpmdecod.cpp 54948 2008-08-03 10:54:33Z VZ $
// Copyright: (c) John Cristy, Vaclav Slavik
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/*
This file is partially based on source code of ImageMagick by John Cristy. Its
license is as follows:
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% X X PPPP M M %
% X X P P MM MM %
% X PPPP M M M %
% X X P M M %
% X X P M M %
% %
% %
% Read/Write ImageMagick Image Format. %
% %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% Copyright (C) 2001 ImageMagick Studio, a non-profit organization dedicated %
% to making software imaging solutions freely available. %
% %
% Permission is hereby granted, free of charge, to any person obtaining a %
% copy of this software and associated documentation files ("ImageMagick"), %
% to deal in ImageMagick without restriction, including without limitation %
% the rights to use, copy, modify, merge, publish, distribute, sublicense, %
% and/or sell copies of ImageMagick, and to permit persons to whom the %
% ImageMagick is furnished to do so, subject to the following conditions: %
% %
% The above copyright notice and this permission notice shall be included in %
% all copies or substantial portions of ImageMagick. %
% %
% The software is provided "as is", without warranty of any kind, express or %
% implied, including but not limited to the warranties of merchantability, %
% fitness for a particular purpose and noninfringement. In no event shall %
% ImageMagick Studio be liable for any claim, damages or other liability, %
% whether in an action of contract, tort or otherwise, arising from, out of %
% or in connection with ImageMagick or the use or other dealings in %
% ImageMagick. %
% %
% Except as contained in this notice, the name of the ImageMagick Studio %
% shall not be used in advertising or otherwise to promote the sale, use or %
% other dealings in ImageMagick without prior written authorization from the %
% ImageMagick Studio. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
* Also contains some pieces from libxpm and its modification for win32 by
* HeDu <hedu@cul-ipn.uni-kiel.de>:
*
* Copyright (C) 1989-95 GROUPE BULL
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of GROUPE BULL shall not be
* used in advertising or otherwise to promote the sale, use or other dealings
* in this Software without prior written authorization from GROUPE BULL.
*/
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_IMAGE && wxUSE_XPM
#include "wx/xpmdecod.h"
#ifndef WX_PRECOMP
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/utils.h"
#include "wx/hashmap.h"
#include "wx/stream.h"
#include "wx/image.h"
#include "wx/palette.h"
#endif
#include <string.h>
#include <ctype.h>
#if wxUSE_STREAMS
bool wxXPMDecoder::CanRead(wxInputStream& stream)
{
unsigned char buf[9];
if ( !stream.Read(buf, WXSIZEOF(buf)) )
return false;
stream.SeekI(-(wxFileOffset)WXSIZEOF(buf), wxFromCurrent);
return memcmp(buf, "/* XPM */", WXSIZEOF(buf)) == 0;
}
wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
{
size_t length = stream.GetSize();
wxCHECK_MSG( length != 0, wxNullImage,
wxT("Cannot read XPM from stream of unknown size") );
// use a smart buffer to be sure to free memory even when we return on
// error
wxCharBuffer buffer(length);
char *xpm_buffer = (char *)buffer.data();
if ( stream.Read(xpm_buffer, length).GetLastError() == wxSTREAM_READ_ERROR )
return wxNullImage;
xpm_buffer[length] = '\0';
/*
* Remove comments from the file:
*/
char *p, *q;
for (p = xpm_buffer; *p != '\0'; p++)
{
if ( (*p == '"') || (*p == '\'') )
{
if (*p == '"')
{
for (p++; *p != '\0'; p++)
if ( (*p == '"') && (*(p - 1) != '\\') )
break;
}
else // *p == '\''
{
for (p++; *p != '\0'; p++)
if ( (*p == '\'') && (*(p - 1) != '\\') )
break;
}
if (*p == '\0')
break;
continue;
}
if ( (*p != '/') || (*(p + 1) != '*') )
continue;
for (q = p + 2; *q != '\0'; q++)
{
if ( (*q == '*') && (*(q + 1) == '/') )
break;
}
// memmove allows overlaps (unlike strcpy):
size_t cpylen = strlen(q + 2) + 1;
memmove(p, q + 2, cpylen);
}
/*
* Remove unquoted characters:
*/
size_t i = 0;
for (p = xpm_buffer; *p != '\0'; p++)
{
if ( *p != '"' )
continue;
for (q = p + 1; *q != '\0'; q++)
if (*q == '"')
break;
strncpy(xpm_buffer + i, p + 1, q - p - 1);
i += q - p - 1;
xpm_buffer[i++] = '\n';
p = q + 1;
}
xpm_buffer[i] = '\0';
/*
* Create array of lines and convert \n's to \0's:
*/
const char **xpm_lines;
size_t lines_cnt = 0;
size_t line;
for (p = xpm_buffer; *p != '\0'; p++)
{
if ( *p == '\n' )
lines_cnt++;
}
if ( !lines_cnt )
{
// this doesn't really look an XPM image
return wxNullImage;
}
xpm_lines = new const char*[lines_cnt + 1];
xpm_lines[0] = xpm_buffer;
line = 1;
for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
{
if ( *p == '\n' )
{
xpm_lines[line] = p + 1;
*p = '\0';
line++;
}
}
xpm_lines[lines_cnt] = NULL;
/*
* Read the image:
*/
wxImage img = ReadData(xpm_lines);
delete[] xpm_lines;
return img;
}
#endif // wxUSE_STREAMS
/*****************************************************************************\
* rgbtab.h *
* *
* A hard coded rgb.txt. To keep it short I removed all colornames with *
* trailing numbers, Blue3 etc, except the GrayXX. Sorry Grey-lovers I prefer *
* Gray ;-). But Grey is recognized on lookups, only on save Gray will be *
* used, maybe you want to do some substitue there too. *
* *
* To save memory the RGBs are coded in one long value, as done by the RGB *
* macro. *
* *
* Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de) *
\*****************************************************************************/
typedef struct
{
const char *name;
wxUint32 rgb;
} rgbRecord;
#define myRGB(r,g,b) ((wxUint32)r<<16|(wxUint32)g<<8|(wxUint32)b)
static rgbRecord theRGBRecords[] =
{
{"aliceblue", myRGB(240, 248, 255)},
{"antiquewhite", myRGB(250, 235, 215)},
{"aquamarine", myRGB(50, 191, 193)},
{"azure", myRGB(240, 255, 255)},
{"beige", myRGB(245, 245, 220)},
{"bisque", myRGB(255, 228, 196)},
{"black", myRGB(0, 0, 0)},
{"blanchedalmond", myRGB(255, 235, 205)},
{"blue", myRGB(0, 0, 255)},
{"blueviolet", myRGB(138, 43, 226)},
{"brown", myRGB(165, 42, 42)},
{"burlywood", myRGB(222, 184, 135)},
{"cadetblue", myRGB(95, 146, 158)},
{"chartreuse", myRGB(127, 255, 0)},
{"chocolate", myRGB(210, 105, 30)},
{"coral", myRGB(255, 114, 86)},
{"cornflowerblue", myRGB(34, 34, 152)},
{"cornsilk", myRGB(255, 248, 220)},
{"cyan", myRGB(0, 255, 255)},
{"darkgoldenrod", myRGB(184, 134, 11)},
{"darkgreen", myRGB(0, 86, 45)},
{"darkkhaki", myRGB(189, 183, 107)},
{"darkolivegreen", myRGB(85, 86, 47)},
{"darkorange", myRGB(255, 140, 0)},
{"darkorchid", myRGB(139, 32, 139)},
{"darksalmon", myRGB(233, 150, 122)},
{"darkseagreen", myRGB(143, 188, 143)},
{"darkslateblue", myRGB(56, 75, 102)},
{"darkslategray", myRGB(47, 79, 79)},
{"darkturquoise", myRGB(0, 166, 166)},
{"darkviolet", myRGB(148, 0, 211)},
{"deeppink", myRGB(255, 20, 147)},
{"deepskyblue", myRGB(0, 191, 255)},
{"dimgray", myRGB(84, 84, 84)},
{"dodgerblue", myRGB(30, 144, 255)},
{"firebrick", myRGB(142, 35, 35)},
{"floralwhite", myRGB(255, 250, 240)},
{"forestgreen", myRGB(80, 159, 105)},
{"gainsboro", myRGB(220, 220, 220)},
{"ghostwhite", myRGB(248, 248, 255)},
{"gold", myRGB(218, 170, 0)},
{"goldenrod", myRGB(239, 223, 132)},
{"gray", myRGB(126, 126, 126)},
{"gray0", myRGB(0, 0, 0)},
{"gray1", myRGB(3, 3, 3)},
{"gray10", myRGB(26, 26, 26)},
{"gray100", myRGB(255, 255, 255)},
{"gray11", myRGB(28, 28, 28)},
{"gray12", myRGB(31, 31, 31)},
{"gray13", myRGB(33, 33, 33)},
{"gray14", myRGB(36, 36, 36)},
{"gray15", myRGB(38, 38, 38)},
{"gray16", myRGB(41, 41, 41)},
{"gray17", myRGB(43, 43, 43)},
{"gray18", myRGB(46, 46, 46)},
{"gray19", myRGB(48, 48, 48)},
{"gray2", myRGB(5, 5, 5)},
{"gray20", myRGB(51, 51, 51)},
{"gray21", myRGB(54, 54, 54)},
{"gray22", myRGB(56, 56, 56)},
{"gray23", myRGB(59, 59, 59)},
{"gray24", myRGB(61, 61, 61)},
{"gray25", myRGB(64, 64, 64)},
{"gray26", myRGB(66, 66, 66)},
{"gray27", myRGB(69, 69, 69)},
{"gray28", myRGB(71, 71, 71)},
{"gray29", myRGB(74, 74, 74)},
{"gray3", myRGB(8, 8, 8)},
{"gray30", myRGB(77, 77, 77)},
{"gray31", myRGB(79, 79, 79)},
{"gray32", myRGB(82, 82, 82)},
{"gray33", myRGB(84, 84, 84)},
{"gray34", myRGB(87, 87, 87)},
{"gray35", myRGB(89, 89, 89)},
{"gray36", myRGB(92, 92, 92)},
{"gray37", myRGB(94, 94, 94)},
{"gray38", myRGB(97, 97, 97)},
{"gray39", myRGB(99, 99, 99)},
{"gray4", myRGB(10, 10, 10)},
{"gray40", myRGB(102, 102, 102)},
{"gray41", myRGB(105, 105, 105)},
{"gray42", myRGB(107, 107, 107)},
{"gray43", myRGB(110, 110, 110)},
{"gray44", myRGB(112, 112, 112)},
{"gray45", myRGB(115, 115, 115)},
{"gray46", myRGB(117, 117, 117)},
{"gray47", myRGB(120, 120, 120)},
{"gray48", myRGB(122, 122, 122)},
{"gray49", myRGB(125, 125, 125)},
{"gray5", myRGB(13, 13, 13)},
{"gray50", myRGB(127, 127, 127)},
{"gray51", myRGB(130, 130, 130)},
{"gray52", myRGB(133, 133, 133)},
{"gray53", myRGB(135, 135, 135)},
{"gray54", myRGB(138, 138, 138)},
{"gray55", myRGB(140, 140, 140)},
{"gray56", myRGB(143, 143, 143)},
{"gray57", myRGB(145, 145, 145)},
{"gray58", myRGB(148, 148, 148)},
{"gray59", myRGB(150, 150, 150)},
{"gray6", myRGB(15, 15, 15)},
{"gray60", myRGB(153, 153, 153)},
{"gray61", myRGB(156, 156, 156)},
{"gray62", myRGB(158, 158, 158)},
{"gray63", myRGB(161, 161, 161)},
{"gray64", myRGB(163, 163, 163)},
{"gray65", myRGB(166, 166, 166)},
{"gray66", myRGB(168, 168, 168)},
{"gray67", myRGB(171, 171, 171)},
{"gray68", myRGB(173, 173, 173)},
{"gray69", myRGB(176, 176, 176)},
{"gray7", myRGB(18, 18, 18)},
{"gray70", myRGB(179, 179, 179)},
{"gray71", myRGB(181, 181, 181)},
{"gray72", myRGB(184, 184, 184)},
{"gray73", myRGB(186, 186, 186)},
{"gray74", myRGB(189, 189, 189)},
{"gray75", myRGB(191, 191, 191)},
{"gray76", myRGB(194, 194, 194)},
{"gray77", myRGB(196, 196, 196)},
{"gray78", myRGB(199, 199, 199)},
{"gray79", myRGB(201, 201, 201)},
{"gray8", myRGB(20, 20, 20)},
{"gray80", myRGB(204, 204, 204)},
{"gray81", myRGB(207, 207, 207)},
{"gray82", myRGB(209, 209, 209)},
{"gray83", myRGB(212, 212, 212)},
{"gray84", myRGB(214, 214, 214)},
{"gray85", myRGB(217, 217, 217)},
{"gray86", myRGB(219, 219, 219)},
{"gray87", myRGB(222, 222, 222)},
{"gray88", myRGB(224, 224, 224)},
{"gray89", myRGB(227, 227, 227)},
{"gray9", myRGB(23, 23, 23)},
{"gray90", myRGB(229, 229, 229)},
{"gray91", myRGB(232, 232, 232)},
{"gray92", myRGB(235, 235, 235)},
{"gray93", myRGB(237, 237, 237)},
{"gray94", myRGB(240, 240, 240)},
{"gray95", myRGB(242, 242, 242)},
{"gray96", myRGB(245, 245, 245)},
{"gray97", myRGB(247, 247, 247)},
{"gray98", myRGB(250, 250, 250)},
{"gray99", myRGB(252, 252, 252)},
{"green", myRGB(0, 255, 0)},
{"greenyellow", myRGB(173, 255, 47)},
{"honeydew", myRGB(240, 255, 240)},
{"hotpink", myRGB(255, 105, 180)},
{"indianred", myRGB(107, 57, 57)},
{"ivory", myRGB(255, 255, 240)},
{"khaki", myRGB(179, 179, 126)},
{"lavender", myRGB(230, 230, 250)},
{"lavenderblush", myRGB(255, 240, 245)},
{"lawngreen", myRGB(124, 252, 0)},
{"lemonchiffon", myRGB(255, 250, 205)},
{"lightblue", myRGB(176, 226, 255)},
{"lightcoral", myRGB(240, 128, 128)},
{"lightcyan", myRGB(224, 255, 255)},
{"lightgoldenrod", myRGB(238, 221, 130)},
{"lightgoldenrodyellow", myRGB(250, 250, 210)},
{"lightgray", myRGB(168, 168, 168)},
{"lightpink", myRGB(255, 182, 193)},
{"lightsalmon", myRGB(255, 160, 122)},
{"lightseagreen", myRGB(32, 178, 170)},
{"lightskyblue", myRGB(135, 206, 250)},
{"lightslateblue", myRGB(132, 112, 255)},
{"lightslategray", myRGB(119, 136, 153)},
{"lightsteelblue", myRGB(124, 152, 211)},
{"lightyellow", myRGB(255, 255, 224)},
{"limegreen", myRGB(0, 175, 20)},
{"linen", myRGB(250, 240, 230)},
{"magenta", myRGB(255, 0, 255)},
{"maroon", myRGB(143, 0, 82)},
{"mediumaquamarine", myRGB(0, 147, 143)},
{"mediumblue", myRGB(50, 50, 204)},
{"mediumforestgreen", myRGB(50, 129, 75)},
{"mediumgoldenrod", myRGB(209, 193, 102)},
{"mediumorchid", myRGB(189, 82, 189)},
{"mediumpurple", myRGB(147, 112, 219)},
{"mediumseagreen", myRGB(52, 119, 102)},
{"mediumslateblue", myRGB(106, 106, 141)},
{"mediumspringgreen", myRGB(35, 142, 35)},
{"mediumturquoise", myRGB(0, 210, 210)},
{"mediumvioletred", myRGB(213, 32, 121)},
{"midnightblue", myRGB(47, 47, 100)},
{"mintcream", myRGB(245, 255, 250)},
{"mistyrose", myRGB(255, 228, 225)},
{"moccasin", myRGB(255, 228, 181)},
{"navajowhite", myRGB(255, 222, 173)},
{"navy", myRGB(35, 35, 117)},
{"navyblue", myRGB(35, 35, 117)},
{"oldlace", myRGB(253, 245, 230)},
{"olivedrab", myRGB(107, 142, 35)},
{"orange", myRGB(255, 135, 0)},
{"orangered", myRGB(255, 69, 0)},
{"orchid", myRGB(239, 132, 239)},
{"palegoldenrod", myRGB(238, 232, 170)},
{"palegreen", myRGB(115, 222, 120)},
{"paleturquoise", myRGB(175, 238, 238)},
{"palevioletred", myRGB(219, 112, 147)},
{"papayawhip", myRGB(255, 239, 213)},
{"peachpuff", myRGB(255, 218, 185)},
{"peru", myRGB(205, 133, 63)},
{"pink", myRGB(255, 181, 197)},
{"plum", myRGB(197, 72, 155)},
{"powderblue", myRGB(176, 224, 230)},
{"purple", myRGB(160, 32, 240)},
{"red", myRGB(255, 0, 0)},
{"rosybrown", myRGB(188, 143, 143)},
{"royalblue", myRGB(65, 105, 225)},
{"saddlebrown", myRGB(139, 69, 19)},
{"salmon", myRGB(233, 150, 122)},
{"sandybrown", myRGB(244, 164, 96)},
{"seagreen", myRGB(82, 149, 132)},
{"seashell", myRGB(255, 245, 238)},
{"sienna", myRGB(150, 82, 45)},
{"silver", myRGB(192, 192, 192)},
{"skyblue", myRGB(114, 159, 255)},
{"slateblue", myRGB(126, 136, 171)},
{"slategray", myRGB(112, 128, 144)},
{"snow", myRGB(255, 250, 250)},
{"springgreen", myRGB(65, 172, 65)},
{"steelblue", myRGB(84, 112, 170)},
{"tan", myRGB(222, 184, 135)},
{"thistle", myRGB(216, 191, 216)},
{"tomato", myRGB(255, 99, 71)},
{"transparent", myRGB(0, 0, 1)},
{"turquoise", myRGB(25, 204, 223)},
{"violet", myRGB(156, 62, 206)},
{"violetred", myRGB(243, 62, 150)},
{"wheat", myRGB(245, 222, 179)},
{"white", myRGB(255, 255, 255)},
{"whitesmoke", myRGB(245, 245, 245)},
{"yellow", myRGB(255, 255, 0)},
{"yellowgreen", myRGB(50, 216, 56)},
{NULL, myRGB(0, 0, 0)}
};
static int numTheRGBRecords = 235;
static unsigned char ParseHexadecimal(char digit1, char digit2)
{
unsigned char i1, i2;
if (digit1 >= 'a')
i1 = (unsigned char)(digit1 - 'a' + 0x0A);
else if (digit1 >= 'A')
i1 = (unsigned char)(digit1 - 'A' + 0x0A);
else
i1 = (unsigned char)(digit1 - '0');
if (digit2 >= 'a')
i2 = (unsigned char)(digit2 - 'a' + 0x0A);
else if (digit2 >= 'A')
i2 = (unsigned char)(digit2 - 'A' + 0x0A);
else
i2 = (unsigned char)(digit2 - '0');
return (unsigned char)(0x10 * i1 + i2);
}
static bool GetRGBFromName(const char *inname, bool *isNone,
unsigned char *r, unsigned char*g, unsigned char *b)
{
int left, right, middle;
int cmp;
wxUint32 rgbVal;
char *name;
char *grey, *p;
// Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
size_t inname_len = strlen(inname);
if ( *inname == '#' && (inname_len == 7 || inname_len == 13))
{
size_t ofs = (inname_len == 7) ? 2 : 4;
*r = ParseHexadecimal(inname[1], inname[2]);
*g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
*b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
*isNone = false;
return true;
}
name = wxStrdupA(inname);
// theRGBRecords[] has no names with spaces, and no grey, but a
// lot of gray...
// so first extract ' '
while ((p = strchr(name, ' ')) != NULL)
{
while (*(p)) // till eof of string
{
*p = *(p + 1); // copy to the left
p++;
}
}
// fold to lower case
p = name;
while (*p)
{
*p = (char)tolower(*p);
p++;
}
// substitute Grey with Gray, else rgbtab.h would have more than 100
// 'duplicate' entries
if ( (grey = strstr(name, "grey")) != NULL )
grey[2] = 'a';
// check for special 'none' colour:
bool found;
if ( strcmp(name, "none") == 0 )
{
*isNone = true;
found = true;
}
else // not "None"
{
found = false;
// binary search:
left = 0;
right = numTheRGBRecords - 1;
do
{
middle = (left + right) / 2;
cmp = strcmp(name, theRGBRecords[middle].name);
if ( cmp == 0 )
{
rgbVal = theRGBRecords[middle].rgb;
*r = (unsigned char)((rgbVal >> 16) & 0xFF);
*g = (unsigned char)((rgbVal >> 8) & 0xFF);
*b = (unsigned char)((rgbVal) & 0xFF);
*isNone = false;
found = true;
break;
}
else if ( cmp < 0 )
{
right = middle - 1;
}
else // cmp > 0
{
left = middle + 1;
}
} while (left <= right);
}
free(name);
return found;
}
static const char *ParseColor(const char *data)
{
static const char *targets[] =
{"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
const char *p, *r;
const char *q;
int i;
for (i = 0; targets[i] != NULL; i++)
{
r = data;
for (q = targets[i]; *r != '\0'; r++)
{
if ( *r != *q )
continue;
if ( !isspace((int) (*(r - 1))) )
continue;
p = r;
for (;;)
{
if ( *q == '\0' )
return p;
if ( *p++ != *q++ )
break;
}
q = targets[i];
}
}
return NULL;
}
struct wxXPMColourMapData
{
wxXPMColourMapData() { R = G = B = 0; }
unsigned char R,G,B;
};
WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);
wxImage wxXPMDecoder::ReadData(const char* const* xpm_data)
{
wxCHECK_MSG(xpm_data, wxNullImage, wxT("NULL XPM data") );
wxImage img;
int count;
unsigned width, height, colors_cnt, chars_per_pixel;
size_t i, j, i_key;
wxChar key[64];
const char *clr_def;
bool hasMask;
wxXPMColourMap clr_tbl;
wxXPMColourMap::iterator it;
wxString maskKey;
/*
* Read hints and initialize structures:
*/
count = sscanf(xpm_data[0], "%u %u %u %u",
&width, &height, &colors_cnt, &chars_per_pixel);
if ( count != 4 || width * height * colors_cnt == 0 )
{
wxLogError(_("XPM: incorrect header format!"));
return wxNullImage;
}
// VS: XPM color map this large would be insane, since XPMs are encoded with
// 92 possible values on each position, 92^64 is *way* larger space than
// 8bit RGB...
wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
if ( !img.Create(width, height) )
return wxNullImage;
img.SetMask(false);
key[chars_per_pixel] = wxT('\0');
hasMask = false;
/*
* Create colour map:
*/
wxXPMColourMapData clr_data;
for (i = 0; i < colors_cnt; i++)
{
const char *xmpColLine = xpm_data[1 + i];
// we must have at least " x y" after the colour index, hence +5
if ( !xmpColLine || strlen(xmpColLine) < chars_per_pixel + 5 )
{
wxLogError(_("XPM: incorrect colour description in line %d"),
(int)(1 + i));
return wxNullImage;
}
for (i_key = 0; i_key < chars_per_pixel; i_key++)
key[i_key] = (wxChar)xmpColLine[i_key];
clr_def = ParseColor(xmpColLine + chars_per_pixel);
if ( clr_def == NULL )
{
wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
xmpColLine, (int)(1 + i));
return wxNullImage;
}
bool isNone = false;
if ( !GetRGBFromName(clr_def, &isNone,
&clr_data.R, &clr_data.G, &clr_data.B) )
{
wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
xmpColLine, (int)(1 + i));
return wxNullImage;
}
if ( isNone )
{
img.SetMask(true);
img.SetMaskColour(255, 0, 255);
clr_data.R =
clr_data.B = 255;
clr_data.G = 0;
hasMask = true;
maskKey = key;
}
clr_tbl[key] = clr_data;
}
/*
* Modify colour entries with RGB = (255,0,255) to (255,0,254) if
* mask colour is present (so that existing pixels with (255,0,255)
* magenta colour are not incorrectly made transparent):
*/
if (hasMask)
{
for (it = clr_tbl.begin(); it != clr_tbl.end(); ++it)
{
if (it->second.R == 255 && it->second.G == 0 &&
it->second.B == 255 &&
it->first != maskKey)
{
it->second.B = 254;
}
}
}
/*
* Parse image data:
*/
unsigned char *img_data = img.GetData();
wxXPMColourMap::iterator entry;
wxXPMColourMap::iterator end = clr_tbl.end();
for (j = 0; j < height; j++)
{
for (i = 0; i < width; i++, img_data += 3)
{
const char *xpmImgLine = xpm_data[1 + colors_cnt + j];
if ( !xpmImgLine || strlen(xpmImgLine) < width*chars_per_pixel )
{
wxLogError(_("XPM: truncated image data at line %d!"),
(int)(1 + colors_cnt + j));
return wxNullImage;
}
for (i_key = 0; i_key < chars_per_pixel; i_key++)
{
key[i_key] = (wxChar)xpmImgLine[chars_per_pixel * i + i_key];
}
entry = clr_tbl.find(key);
if ( entry == end )
{
wxLogError(_("XPM: Malformed pixel data!"));
// better return right now as otherwise we risk to flood the
// user with error messages as something seems to be seriously
// wrong with the file and so we could give this message for
// each remaining pixel if we don't bail out
return wxNullImage;
}
else
{
img_data[0] = entry->second.R;
img_data[1] = entry->second.G;
img_data[2] = entry->second.B;
}
}
}
#if wxUSE_PALETTE
unsigned char* r = new unsigned char[colors_cnt];
unsigned char* g = new unsigned char[colors_cnt];
unsigned char* b = new unsigned char[colors_cnt];
for (it = clr_tbl.begin(), i = 0; it != clr_tbl.end(); it++, i++)
{
r[i] = it->second.R;
g[i] = it->second.G;
b[i] = it->second.B;
}
wxASSERT(i == colors_cnt);
img.SetPalette(wxPalette(colors_cnt, r, g, b));
delete[] r;
delete[] g;
delete[] b;
#endif // wxUSE_PALETTE
return img;
}
#endif // wxUSE_IMAGE && wxUSE_XPM
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