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xenia-canary/third_party/crunch/crnlib/crn_ktx_texture.cpp

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Adding Crunch at r319.
2014-01-21 07:02:34 +00:00
// File: crn_ktx_texture.cpp
#include "crn_core.h"
#include "crn_ktx_texture.h"
#include "crn_console.h"
// Set #if CRNLIB_KTX_PVRTEX_WORKAROUNDS to 1 to enable various workarounds for oddball KTX files written by PVRTexTool.
#define CRNLIB_KTX_PVRTEX_WORKAROUNDS 1
namespace crnlib
{
const uint8 s_ktx_file_id[12] = { 0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A };
bool is_packed_pixel_ogl_type(uint32 ogl_type)
{
switch (ogl_type)
{
case KTX_UNSIGNED_BYTE_3_3_2:
case KTX_UNSIGNED_BYTE_2_3_3_REV:
case KTX_UNSIGNED_SHORT_5_6_5:
case KTX_UNSIGNED_SHORT_5_6_5_REV:
case KTX_UNSIGNED_SHORT_4_4_4_4:
case KTX_UNSIGNED_SHORT_4_4_4_4_REV:
case KTX_UNSIGNED_SHORT_5_5_5_1:
case KTX_UNSIGNED_SHORT_1_5_5_5_REV:
case KTX_UNSIGNED_INT_8_8_8_8:
case KTX_UNSIGNED_INT_8_8_8_8_REV:
case KTX_UNSIGNED_INT_10_10_10_2:
case KTX_UNSIGNED_INT_2_10_10_10_REV:
case KTX_UNSIGNED_INT_24_8:
case KTX_UNSIGNED_INT_10F_11F_11F_REV:
case KTX_UNSIGNED_INT_5_9_9_9_REV:
return true;
}
return false;
}
uint get_ogl_type_size(uint32 ogl_type)
{
switch (ogl_type)
{
case KTX_UNSIGNED_BYTE:
case KTX_BYTE:
return 1;
case KTX_HALF_FLOAT:
case KTX_UNSIGNED_SHORT:
case KTX_SHORT:
return 2;
case KTX_FLOAT:
case KTX_UNSIGNED_INT:
case KTX_INT:
return 4;
case KTX_UNSIGNED_BYTE_3_3_2:
case KTX_UNSIGNED_BYTE_2_3_3_REV:
return 1;
case KTX_UNSIGNED_SHORT_5_6_5:
case KTX_UNSIGNED_SHORT_5_6_5_REV:
case KTX_UNSIGNED_SHORT_4_4_4_4:
case KTX_UNSIGNED_SHORT_4_4_4_4_REV:
case KTX_UNSIGNED_SHORT_5_5_5_1:
case KTX_UNSIGNED_SHORT_1_5_5_5_REV:
return 2;
case KTX_UNSIGNED_INT_8_8_8_8:
case KTX_UNSIGNED_INT_8_8_8_8_REV:
case KTX_UNSIGNED_INT_10_10_10_2:
case KTX_UNSIGNED_INT_2_10_10_10_REV:
case KTX_UNSIGNED_INT_24_8:
case KTX_UNSIGNED_INT_10F_11F_11F_REV:
case KTX_UNSIGNED_INT_5_9_9_9_REV:
return 4;
}
return 0;
}
uint32 get_ogl_base_internal_fmt(uint32 ogl_fmt)
{
switch (ogl_fmt)
{
case KTX_ETC1_RGB8_OES:
case KTX_RGB_S3TC:
case KTX_RGB4_S3TC:
case KTX_COMPRESSED_RGB_S3TC_DXT1_EXT:
case KTX_COMPRESSED_SRGB_S3TC_DXT1_EXT:
return KTX_RGB;
case KTX_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
case KTX_RGBA_S3TC:
case KTX_RGBA4_S3TC:
case KTX_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
case KTX_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
case KTX_RGBA_DXT5_S3TC:
case KTX_RGBA4_DXT5_S3TC:
return KTX_RGBA;
case 1:
case KTX_RED:
case KTX_RED_INTEGER:
case KTX_GREEN:
case KTX_GREEN_INTEGER:
case KTX_BLUE:
case KTX_BLUE_INTEGER:
case KTX_R8:
case KTX_R8UI:
case KTX_LUMINANCE8:
case KTX_ALPHA:
case KTX_LUMINANCE:
case KTX_COMPRESSED_RED_RGTC1_EXT:
case KTX_COMPRESSED_SIGNED_RED_RGTC1_EXT:
case KTX_COMPRESSED_LUMINANCE_LATC1_EXT:
case KTX_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
return KTX_RED;
case 2:
case KTX_RG:
case KTX_RG8:
case KTX_RG_INTEGER:
case KTX_LUMINANCE_ALPHA:
case KTX_COMPRESSED_RED_GREEN_RGTC2_EXT:
case KTX_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT:
case KTX_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
case KTX_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
return KTX_RG;
case 3:
case KTX_SRGB:
case KTX_RGB:
case KTX_RGB_INTEGER:
case KTX_BGR:
case KTX_BGR_INTEGER:
case KTX_RGB8:
case KTX_SRGB8:
return KTX_RGB;
case 4:
case KTX_RGBA:
case KTX_BGRA:
case KTX_RGBA_INTEGER:
case KTX_BGRA_INTEGER:
case KTX_SRGB_ALPHA:
case KTX_SRGB8_ALPHA8:
case KTX_RGBA8:
return KTX_RGBA;
}
return 0;
}
bool get_ogl_fmt_desc(uint32 ogl_fmt, uint32 ogl_type, uint& block_dim, uint& bytes_per_block)
{
uint ogl_type_size = get_ogl_type_size(ogl_type);
block_dim = 1;
bytes_per_block = 0;
switch (ogl_fmt)
{
case KTX_COMPRESSED_RED_RGTC1_EXT:
case KTX_COMPRESSED_SIGNED_RED_RGTC1_EXT:
case KTX_COMPRESSED_LUMINANCE_LATC1_EXT:
case KTX_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
case KTX_ETC1_RGB8_OES:
case KTX_RGB_S3TC:
case KTX_RGB4_S3TC:
case KTX_COMPRESSED_RGB_S3TC_DXT1_EXT:
case KTX_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case KTX_COMPRESSED_SRGB_S3TC_DXT1_EXT:
case KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
{
block_dim = 4;
bytes_per_block = 8;
break;
}
case KTX_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
case KTX_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
case KTX_COMPRESSED_RED_GREEN_RGTC2_EXT:
case KTX_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT:
case KTX_RGBA_S3TC:
case KTX_RGBA4_S3TC:
case KTX_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
case KTX_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case KTX_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
case KTX_RGBA_DXT5_S3TC:
case KTX_RGBA4_DXT5_S3TC:
{
block_dim = 4;
bytes_per_block = 16;
break;
}
case 1:
case KTX_ALPHA:
case KTX_RED:
case KTX_GREEN:
case KTX_BLUE:
case KTX_RED_INTEGER:
case KTX_GREEN_INTEGER:
case KTX_BLUE_INTEGER:
case KTX_LUMINANCE:
{
bytes_per_block = ogl_type_size;
break;
}
case KTX_R8:
case KTX_R8UI:
case KTX_ALPHA8:
case KTX_LUMINANCE8:
{
bytes_per_block = 1;
break;
}
case 2:
case KTX_RG:
case KTX_RG_INTEGER:
case KTX_LUMINANCE_ALPHA:
{
bytes_per_block = 2 * ogl_type_size;
break;
}
case KTX_RG8:
case KTX_LUMINANCE8_ALPHA8:
{
bytes_per_block = 2;
break;
}
case 3:
case KTX_SRGB:
case KTX_RGB:
case KTX_BGR:
case KTX_RGB_INTEGER:
case KTX_BGR_INTEGER:
{
bytes_per_block = is_packed_pixel_ogl_type(ogl_type) ? ogl_type_size : (3 * ogl_type_size);
break;
}
case KTX_RGB8:
case KTX_SRGB8:
{
bytes_per_block = 3;
break;
}
case 4:
case KTX_RGBA:
case KTX_BGRA:
case KTX_RGBA_INTEGER:
case KTX_BGRA_INTEGER:
case KTX_SRGB_ALPHA:
{
bytes_per_block = is_packed_pixel_ogl_type(ogl_type) ? ogl_type_size : (4 * ogl_type_size);
break;
}
case KTX_SRGB8_ALPHA8:
case KTX_RGBA8:
{
bytes_per_block = 4;
break;
}
default:
return false;
}
return true;
}
bool ktx_texture::compute_pixel_info()
{
if ((!m_header.m_glType) || (!m_header.m_glFormat))
{
if ((m_header.m_glType) || (m_header.m_glFormat))
return false;
// Must be a compressed format.
if (!get_ogl_fmt_desc(m_header.m_glInternalFormat, m_header.m_glType, m_block_dim, m_bytes_per_block))
{
#if CRNLIB_KTX_PVRTEX_WORKAROUNDS
if ((!m_header.m_glInternalFormat) && (!m_header.m_glType) && (!m_header.m_glTypeSize) && (!m_header.m_glBaseInternalFormat))
{
// PVRTexTool writes bogus headers when outputting ETC1.
console::warning("ktx_texture::compute_pixel_info: Header doesn't specify any format, assuming ETC1 and hoping for the best");
m_header.m_glBaseInternalFormat = KTX_RGB;
m_header.m_glInternalFormat = KTX_ETC1_RGB8_OES;
m_header.m_glTypeSize = 1;
m_block_dim = 4;
m_bytes_per_block = 8;
return true;
}
#endif
return false;
}
if (m_block_dim == 1)
return false;
}
else
{
// Must be an uncompressed format.
if (!get_ogl_fmt_desc(m_header.m_glFormat, m_header.m_glType, m_block_dim, m_bytes_per_block))
return false;
if (m_block_dim > 1)
return false;
}
return true;
}
bool ktx_texture::read_from_stream(data_stream_serializer& serializer)
{
clear();
// Read header
if (serializer.read(&m_header, 1, sizeof(m_header)) != sizeof(ktx_header))
return false;
// Check header
if (memcmp(s_ktx_file_id, m_header.m_identifier, sizeof(m_header.m_identifier)))
return false;
if ((m_header.m_endianness != KTX_OPPOSITE_ENDIAN) && (m_header.m_endianness != KTX_ENDIAN))
return false;
m_opposite_endianness = (m_header.m_endianness == KTX_OPPOSITE_ENDIAN);
if (m_opposite_endianness)
{
m_header.endian_swap();
if ((m_header.m_glTypeSize != sizeof(uint8)) && (m_header.m_glTypeSize != sizeof(uint16)) && (m_header.m_glTypeSize != sizeof(uint32)))
return false;
}
if (!check_header())
return false;
if (!compute_pixel_info())
return false;
uint8 pad_bytes[3];
// Read the key value entries
uint num_key_value_bytes_remaining = m_header.m_bytesOfKeyValueData;
while (num_key_value_bytes_remaining)
{
if (num_key_value_bytes_remaining < sizeof(uint32))
return false;
uint32 key_value_byte_size;
if (serializer.read(&key_value_byte_size, 1, sizeof(uint32)) != sizeof(uint32))
return false;
num_key_value_bytes_remaining -= sizeof(uint32);
if (m_opposite_endianness)
key_value_byte_size = utils::swap32(key_value_byte_size);
if (key_value_byte_size > num_key_value_bytes_remaining)
return false;
uint8_vec key_value_data;
if (key_value_byte_size)
{
key_value_data.resize(key_value_byte_size);
if (serializer.read(&key_value_data[0], 1, key_value_byte_size) != key_value_byte_size)
return false;
}
m_key_values.push_back(key_value_data);
uint padding = 3 - ((key_value_byte_size + 3) % 4);
if (padding)
{
if (serializer.read(pad_bytes, 1, padding) != padding)
return false;
}
num_key_value_bytes_remaining -= key_value_byte_size;
if (num_key_value_bytes_remaining < padding)
return false;
num_key_value_bytes_remaining -= padding;
}
// Now read the mip levels
uint total_faces = get_num_mips() * get_array_size() * get_num_faces() * get_depth();
if ((!total_faces) || (total_faces > 65535))
return false;
// See Section 2.8 of KTX file format: No rounding to block sizes should be applied for block compressed textures.
// OK, I'm going to break that rule otherwise KTX can only store a subset of textures that DDS can handle for no good reason.
#if 0
const uint mip0_row_blocks = m_header.m_pixelWidth / m_block_dim;
const uint mip0_col_blocks = CRNLIB_MAX(1, m_header.m_pixelHeight) / m_block_dim;
#else
const uint mip0_row_blocks = (m_header.m_pixelWidth + m_block_dim - 1) / m_block_dim;
const uint mip0_col_blocks = (CRNLIB_MAX(1, m_header.m_pixelHeight) + m_block_dim - 1) / m_block_dim;
#endif
if ((!mip0_row_blocks) || (!mip0_col_blocks))
return false;
const uint mip0_depth = CRNLIB_MAX(1, m_header.m_pixelDepth); mip0_depth;
bool has_valid_image_size_fields = true;
bool disable_mip_and_cubemap_padding = false;
#if CRNLIB_KTX_PVRTEX_WORKAROUNDS
{
// PVRTexTool has a bogus KTX writer that doesn't write any imageSize fields. Nice.
size_t expected_bytes_remaining = 0;
for (uint mip_level = 0; mip_level < get_num_mips(); mip_level++)
{
uint mip_width, mip_height, mip_depth;
get_mip_dim(mip_level, mip_width, mip_height, mip_depth);
const uint mip_row_blocks = (mip_width + m_block_dim - 1) / m_block_dim;
const uint mip_col_blocks = (mip_height + m_block_dim - 1) / m_block_dim;
if ((!mip_row_blocks) || (!mip_col_blocks))
return false;
expected_bytes_remaining += sizeof(uint32);
if ((!m_header.m_numberOfArrayElements) && (get_num_faces() == 6))
{
for (uint face = 0; face < get_num_faces(); face++)
{
uint slice_size = mip_row_blocks * mip_col_blocks * m_bytes_per_block;
expected_bytes_remaining += slice_size;
uint num_cube_pad_bytes = 3 - ((slice_size + 3) % 4);
expected_bytes_remaining += num_cube_pad_bytes;
}
}
else
{
uint total_mip_size = 0;
for (uint array_element = 0; array_element < get_array_size(); array_element++)
{
for (uint face = 0; face < get_num_faces(); face++)
{
for (uint zslice = 0; zslice < mip_depth; zslice++)
{
uint slice_size = mip_row_blocks * mip_col_blocks * m_bytes_per_block;
total_mip_size += slice_size;
}
}
}
expected_bytes_remaining += total_mip_size;
uint num_mip_pad_bytes = 3 - ((total_mip_size + 3) % 4);
expected_bytes_remaining += num_mip_pad_bytes;
}
}
if (serializer.get_stream()->get_remaining() < expected_bytes_remaining)
{
has_valid_image_size_fields = false;
disable_mip_and_cubemap_padding = true;
console::warning("ktx_texture::read_from_stream: KTX file size is smaller than expected - trying to read anyway without imageSize fields");
}
}
#endif
for (uint mip_level = 0; mip_level < get_num_mips(); mip_level++)
{
uint mip_width, mip_height, mip_depth;
get_mip_dim(mip_level, mip_width, mip_height, mip_depth);
const uint mip_row_blocks = (mip_width + m_block_dim - 1) / m_block_dim;
const uint mip_col_blocks = (mip_height + m_block_dim - 1) / m_block_dim;
if ((!mip_row_blocks) || (!mip_col_blocks))
return false;
uint32 image_size = 0;
if (!has_valid_image_size_fields)
image_size = mip_depth * mip_row_blocks * mip_col_blocks * m_bytes_per_block * get_array_size() * get_num_faces();
else
{
if (serializer.read(&image_size, 1, sizeof(image_size)) != sizeof(image_size))
return false;
if (m_opposite_endianness)
image_size = utils::swap32(image_size);
}
if (!image_size)
return false;
uint total_mip_size = 0;
if ((!m_header.m_numberOfArrayElements) && (get_num_faces() == 6))
{
// plain non-array cubemap
for (uint face = 0; face < get_num_faces(); face++)
{
CRNLIB_ASSERT(m_image_data.size() == get_image_index(mip_level, 0, face, 0));
m_image_data.push_back(uint8_vec());
uint8_vec& image_data = m_image_data.back();
image_data.resize(image_size);
if (serializer.read(&image_data[0], 1, image_size) != image_size)
return false;
if (m_opposite_endianness)
utils::endian_swap_mem(&image_data[0], image_size, m_header.m_glTypeSize);
uint num_cube_pad_bytes = disable_mip_and_cubemap_padding ? 0 : (3 - ((image_size + 3) % 4));
if (serializer.read(pad_bytes, 1, num_cube_pad_bytes) != num_cube_pad_bytes)
return false;
total_mip_size += image_size + num_cube_pad_bytes;
}
}
else
{
// 1D, 2D, 3D (normal or array texture), or array cubemap
uint num_image_bytes_remaining = image_size;
for (uint array_element = 0; array_element < get_array_size(); array_element++)
{
for (uint face = 0; face < get_num_faces(); face++)
{
for (uint zslice = 0; zslice < mip_depth; zslice++)
{
CRNLIB_ASSERT(m_image_data.size() == get_image_index(mip_level, array_element, face, zslice));
uint slice_size = mip_row_blocks * mip_col_blocks * m_bytes_per_block;
if ((!slice_size) || (slice_size > num_image_bytes_remaining))
return false;
m_image_data.push_back(uint8_vec());
uint8_vec& image_data = m_image_data.back();
image_data.resize(slice_size);
if (serializer.read(&image_data[0], 1, slice_size) != slice_size)
return false;
if (m_opposite_endianness)
utils::endian_swap_mem(&image_data[0], slice_size, m_header.m_glTypeSize);
num_image_bytes_remaining -= slice_size;
total_mip_size += slice_size;
}
}
}
if (num_image_bytes_remaining)
return false;
}
uint num_mip_pad_bytes = disable_mip_and_cubemap_padding ? 0 : (3 - ((total_mip_size + 3) % 4));
if (serializer.read(pad_bytes, 1, num_mip_pad_bytes) != num_mip_pad_bytes)
return false;
}
return true;
}
bool ktx_texture::write_to_stream(data_stream_serializer& serializer, bool no_keyvalue_data)
{
if (!consistency_check())
{
CRNLIB_ASSERT(0);
return false;
}
memcpy(m_header.m_identifier, s_ktx_file_id, sizeof(m_header.m_identifier));
m_header.m_endianness = m_opposite_endianness ? KTX_OPPOSITE_ENDIAN : KTX_ENDIAN;
if (m_block_dim == 1)
{
m_header.m_glTypeSize = get_ogl_type_size(m_header.m_glType);
m_header.m_glBaseInternalFormat = m_header.m_glFormat;
}
else
{
m_header.m_glBaseInternalFormat = get_ogl_base_internal_fmt(m_header.m_glInternalFormat);
}
m_header.m_bytesOfKeyValueData = 0;
if (!no_keyvalue_data)
{
for (uint i = 0; i < m_key_values.size(); i++)
m_header.m_bytesOfKeyValueData += sizeof(uint32) + ((m_key_values[i].size() + 3) & ~3);
}
if (m_opposite_endianness)
m_header.endian_swap();
bool success = (serializer.write(&m_header, sizeof(m_header), 1) == 1);
if (m_opposite_endianness)
m_header.endian_swap();
if (!success)
return success;
uint total_key_value_bytes = 0;
const uint8 padding[3] = { 0, 0, 0 };
if (!no_keyvalue_data)
{
for (uint i = 0; i < m_key_values.size(); i++)
{
uint32 key_value_size = m_key_values[i].size();
if (m_opposite_endianness)
key_value_size = utils::swap32(key_value_size);
success = (serializer.write(&key_value_size, sizeof(key_value_size), 1) == 1);
total_key_value_bytes += sizeof(key_value_size);
if (m_opposite_endianness)
key_value_size = utils::swap32(key_value_size);
if (!success)
return false;
if (key_value_size)
{
if (serializer.write(&m_key_values[i][0], key_value_size, 1) != 1)
return false;
total_key_value_bytes += key_value_size;
uint num_padding = 3 - ((key_value_size + 3) % 4);
if ((num_padding) && (serializer.write(padding, num_padding, 1) != 1))
return false;
total_key_value_bytes += num_padding;
}
}
(void)total_key_value_bytes;
}
CRNLIB_ASSERT(total_key_value_bytes == m_header.m_bytesOfKeyValueData);
for (uint mip_level = 0; mip_level < get_num_mips(); mip_level++)
{
uint mip_width, mip_height, mip_depth;
get_mip_dim(mip_level, mip_width, mip_height, mip_depth);
const uint mip_row_blocks = (mip_width + m_block_dim - 1) / m_block_dim;
const uint mip_col_blocks = (mip_height + m_block_dim - 1) / m_block_dim;
if ((!mip_row_blocks) || (!mip_col_blocks))
return false;
uint32 image_size = mip_row_blocks * mip_col_blocks * m_bytes_per_block;
if ((m_header.m_numberOfArrayElements) || (get_num_faces() == 1))
image_size *= (get_array_size() * get_num_faces() * get_depth());
if (!image_size)
return false;
if (m_opposite_endianness)
image_size = utils::swap32(image_size);
success = (serializer.write(&image_size, sizeof(image_size), 1) == 1);
if (m_opposite_endianness)
image_size = utils::swap32(image_size);
if (!success)
return false;
uint total_mip_size = 0;
if ((!m_header.m_numberOfArrayElements) && (get_num_faces() == 6))
{
// plain non-array cubemap
for (uint face = 0; face < get_num_faces(); face++)
{
const uint8_vec& image_data = get_image_data(get_image_index(mip_level, 0, face, 0));
if ((!image_data.size()) || (image_data.size() != image_size))
return false;
if (m_opposite_endianness)
{
uint8_vec tmp_image_data(image_data);
utils::endian_swap_mem(&tmp_image_data[0], tmp_image_data.size(), m_header.m_glTypeSize);
if (serializer.write(&tmp_image_data[0], tmp_image_data.size(), 1) != 1)
return false;
}
else if (serializer.write(&image_data[0], image_data.size(), 1) != 1)
return false;
uint num_cube_pad_bytes = 3 - ((image_data.size() + 3) % 4);
if ((num_cube_pad_bytes) && (serializer.write(padding, num_cube_pad_bytes, 1) != 1))
return false;
total_mip_size += image_size + num_cube_pad_bytes;
}
}
else
{
// 1D, 2D, 3D (normal or array texture), or array cubemap
for (uint array_element = 0; array_element < get_array_size(); array_element++)
{
for (uint face = 0; face < get_num_faces(); face++)
{
for (uint zslice = 0; zslice < mip_depth; zslice++)
{
const uint8_vec& image_data = get_image_data(get_image_index(mip_level, array_element, face, zslice));
if (!image_data.size())
return false;
if (m_opposite_endianness)
{
uint8_vec tmp_image_data(image_data);
utils::endian_swap_mem(&tmp_image_data[0], tmp_image_data.size(), m_header.m_glTypeSize);
if (serializer.write(&tmp_image_data[0], tmp_image_data.size(), 1) != 1)
return false;
}
else if (serializer.write(&image_data[0], image_data.size(), 1) != 1)
return false;
total_mip_size += image_data.size();
}
}
}
uint num_mip_pad_bytes = 3 - ((total_mip_size + 3) % 4);
if ((num_mip_pad_bytes) && (serializer.write(padding, num_mip_pad_bytes, 1) != 1))
return false;
total_mip_size += num_mip_pad_bytes;
}
CRNLIB_ASSERT((total_mip_size & 3) == 0);
}
return true;
}
bool ktx_texture::init_2D(uint width, uint height, uint num_mips, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type)
{
clear();
m_header.m_pixelWidth = width;
m_header.m_pixelHeight = height;
m_header.m_numberOfMipmapLevels = num_mips;
m_header.m_glInternalFormat = ogl_internal_fmt;
m_header.m_glFormat = ogl_fmt;
m_header.m_glType = ogl_type;
m_header.m_numberOfFaces = 1;
if (!compute_pixel_info())
return false;
return true;
}
bool ktx_texture::init_2D_array(uint width, uint height, uint num_mips, uint array_size, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type)
{
clear();
m_header.m_pixelWidth = width;
m_header.m_pixelHeight = height;
m_header.m_numberOfMipmapLevels = num_mips;
m_header.m_numberOfArrayElements = array_size;
m_header.m_glInternalFormat = ogl_internal_fmt;
m_header.m_glFormat = ogl_fmt;
m_header.m_glType = ogl_type;
m_header.m_numberOfFaces = 1;
if (!compute_pixel_info())
return false;
return true;
}
bool ktx_texture::init_3D(uint width, uint height, uint depth, uint num_mips, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type)
{
clear();
m_header.m_pixelWidth = width;
m_header.m_pixelHeight = height;
m_header.m_pixelDepth = depth;
m_header.m_numberOfMipmapLevels = num_mips;
m_header.m_glInternalFormat = ogl_internal_fmt;
m_header.m_glFormat = ogl_fmt;
m_header.m_glType = ogl_type;
m_header.m_numberOfFaces = 1;
if (!compute_pixel_info())
return false;
return true;
}
bool ktx_texture::init_cubemap(uint dim, uint num_mips, uint32 ogl_internal_fmt, uint32 ogl_fmt, uint32 ogl_type)
{
clear();
m_header.m_pixelWidth = dim;
m_header.m_pixelHeight = dim;
m_header.m_numberOfMipmapLevels = num_mips;
m_header.m_glInternalFormat = ogl_internal_fmt;
m_header.m_glFormat = ogl_fmt;
m_header.m_glType = ogl_type;
m_header.m_numberOfFaces = 6;
if (!compute_pixel_info())
return false;
return true;
}
bool ktx_texture::check_header() const
{
if (((get_num_faces() != 1) && (get_num_faces() != 6)) || (!m_header.m_pixelWidth))
return false;
if ((!m_header.m_pixelHeight) && (m_header.m_pixelDepth))
return false;
if ((get_num_faces() == 6) && ((m_header.m_pixelDepth) || (!m_header.m_pixelHeight)))
return false;
if (m_header.m_numberOfMipmapLevels)
{
const uint max_mipmap_dimension = 1U << (m_header.m_numberOfMipmapLevels - 1U);
if (max_mipmap_dimension > (CRNLIB_MAX(CRNLIB_MAX(m_header.m_pixelWidth, m_header.m_pixelHeight), m_header.m_pixelDepth)))
return false;
}
return true;
}
bool ktx_texture::consistency_check() const
{
if (!check_header())
return false;
uint block_dim = 0, bytes_per_block = 0;
if ((!m_header.m_glType) || (!m_header.m_glFormat))
{
if ((m_header.m_glType) || (m_header.m_glFormat))
return false;
if (!get_ogl_fmt_desc(m_header.m_glInternalFormat, m_header.m_glType, block_dim, bytes_per_block))
return false;
if (block_dim == 1)
return false;
//if ((get_width() % block_dim) || (get_height() % block_dim))
// return false;
}
else
{
if (!get_ogl_fmt_desc(m_header.m_glFormat, m_header.m_glType, block_dim, bytes_per_block))
return false;
if (block_dim > 1)
return false;
}
if ((m_block_dim != block_dim) || (m_bytes_per_block != bytes_per_block))
return false;
if (m_image_data.size() != get_total_images())
return false;
for (uint mip_level = 0; mip_level < get_num_mips(); mip_level++)
{
uint mip_width, mip_height, mip_depth;
get_mip_dim(mip_level, mip_width, mip_height, mip_depth);
const uint mip_row_blocks = (mip_width + m_block_dim - 1) / m_block_dim;
const uint mip_col_blocks = (mip_height + m_block_dim - 1) / m_block_dim;
if ((!mip_row_blocks) || (!mip_col_blocks))
return false;
for (uint array_element = 0; array_element < get_array_size(); array_element++)
{
for (uint face = 0; face < get_num_faces(); face++)
{
for (uint zslice = 0; zslice < mip_depth; zslice++)
{
const uint8_vec& image_data = get_image_data(get_image_index(mip_level, array_element, face, zslice));
uint expected_image_size = mip_row_blocks * mip_col_blocks * m_bytes_per_block;
if (image_data.size() != expected_image_size)
return false;
}
}
}
}
return true;
}
const uint8_vec* ktx_texture::find_key(const char* pKey) const
{
const size_t n = strlen(pKey) + 1;
for (uint i = 0; i < m_key_values.size(); i++)
{
const uint8_vec& v = m_key_values[i];
if ((v.size() >= n) && (!memcmp(&v[0], pKey, n)))
return &v;
}
return NULL;
}
bool ktx_texture::get_key_value_as_string(const char* pKey, dynamic_string& str) const
{
const uint8_vec* p = find_key(pKey);
if (!p)
{
str.clear();
return false;
}
const uint ofs = (static_cast<uint>(strlen(pKey)) + 1);
const uint8* pValue = p->get_ptr() + ofs;
const uint n = p->size() - ofs;
uint i;
for (i = 0; i < n; i++)
if (!pValue[i])
break;
str.set_from_buf(pValue, i);
return true;
}
uint ktx_texture::add_key_value(const char* pKey, const void* pVal, uint val_size)
{
const uint idx = m_key_values.size();
m_key_values.resize(idx + 1);
uint8_vec& v = m_key_values.back();
v.append(reinterpret_cast<const uint8*>(pKey), static_cast<uint>(strlen(pKey)) + 1);
v.append(static_cast<const uint8*>(pVal), val_size);
return idx;
}
} // namespace crnlib