TEXLoader::IoStatus TEXLoader::Save(const Texture& texture, bool compressed) {
if (texture.GetColorMap(0) == 0) {
return kStatusMissingColormapError;
}
// Calculate log2 of width and height.
int width = 0;
int height = 0;
int log2_width = 0;
int log2_height = 0;
if (texture.IsCubeMap() == false) {
width = texture.GetColorMap(0)->GetWidth();
height = texture.GetColorMap(0)->GetHeight();
} else {
width = texture.GetCubeMapPosX(0)->GetWidth();
height = texture.GetCubeMapPosX(0)->GetHeight();
}
while ((1 << log2_width) < width) {
log2_width++;
}
while ((1 << log2_height) < height) {
log2_height++;
}
// Prepare file header.
FileHeader file_header;
file_header.tex_magic_[0] = 'T';
file_header.tex_magic_[1] = 'T';
file_header.tex_magic_[2] = 'E';
file_header.tex_magic_[3] = 'X';
file_header.version_ = 1;
file_header.data_offset_ = 16; // Size of file header.
file_header.dimension_powers_ = (uint8)((log2_height << 4) | log2_width);
file_header.compression_flag_ = compressed == true ? 1 : 0;
file_header.map_flags_ = 0;
if (texture.IsCubeMap() == false) {
if (texture.GetAlphaMap(0) != 0 ||
texture.GetColorMap(0)->GetBitDepth() == Canvas::kBitdepth32Bit)
file_header.map_flags_ |= kAlphaMap;
if (texture.GetNormalMap(0) != 0)
file_header.map_flags_ |= kNormalMap;
if (texture.GetSpecularMap(0) != 0)
file_header.map_flags_ |= kSpecularMap;
} else {
file_header.map_flags_ = kCubeMap;
}
// Write the file header.
save_file_->WriteData(file_header.tex_magic_, 4);
save_file_->Write(file_header.version_);
save_file_->Write(file_header.data_offset_);
save_file_->Write(file_header.dimension_powers_);
save_file_->Write(file_header.compression_flag_);
save_file_->Write(file_header.map_flags_);
int num_levels = texture.GetNumMipMapLevels();
if (texture.IsCubeMap() == false) {
int i;
for (i = 0; i < num_levels; i++) {
if (texture.GetColorMap(i)->GetBitDepth() != Canvas::kBitdepth24Bit) {
Canvas temp(*texture.GetColorMap(i), true);
temp.ConvertBitDepth(Canvas::kBitdepth24Bit);
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(temp);
else
save_file_->WriteData(temp.GetBuffer(), temp.GetBufferByteSize());
} else {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetColorMap(i));
else
save_file_->WriteData(texture.GetColorMap(i)->GetBuffer(), texture.GetColorMap(i)->GetBufferByteSize());
}
}
if (texture.GetAlphaMap(0) != 0) {
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetAlphaMap(i));
else
save_file_->WriteData(texture.GetAlphaMap(i)->GetBuffer(), texture.GetAlphaMap(i)->GetBufferByteSize());
}
} else if(texture.GetColorMap(0)->GetBitDepth() == Canvas::kBitdepth32Bit) {
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
Canvas alpha_map;
texture.GetColorMap(i)->GetAlphaChannel(alpha_map);
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(alpha_map);
else
save_file_->WriteData(alpha_map.GetBuffer(), alpha_map.GetBufferByteSize());
}
}
if (texture.GetNormalMap(0) != 0) {
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetNormalMap(i));
else
save_file_->WriteData(texture.GetNormalMap(i)->GetBuffer(), texture.GetNormalMap(i)->GetBufferByteSize());
}
}
if (texture.GetSpecularMap(0) != 0) {
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetSpecularMap(i));
else
save_file_->WriteData(texture.GetSpecularMap(i)->GetBuffer(), texture.GetSpecularMap(i)->GetBufferByteSize());
}
}
} else {
int i;
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetCubeMapPosX(i));
else
save_file_->WriteData(texture.GetCubeMapPosX(i)->GetBuffer(), texture.GetCubeMapPosX(i)->GetBufferByteSize());
}
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetCubeMapNegX(i));
else
save_file_->WriteData(texture.GetCubeMapNegX(i)->GetBuffer(), texture.GetCubeMapNegX(i)->GetBufferByteSize());
}
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetCubeMapPosY(i));
else
save_file_->WriteData(texture.GetCubeMapPosY(i)->GetBuffer(), texture.GetCubeMapPosY(i)->GetBufferByteSize());
}
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetCubeMapNegY(i));
else
save_file_->WriteData(texture.GetCubeMapNegY(i)->GetBuffer(), texture.GetCubeMapNegY(i)->GetBufferByteSize());
}
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetCubeMapPosZ(i));
else
save_file_->WriteData(texture.GetCubeMapPosZ(i)->GetBuffer(), texture.GetCubeMapPosZ(i)->GetBufferByteSize());
}
for (i = 0; i < texture.GetNumMipMapLevels(); i++) {
if (i < (num_levels - 2) && compressed == true)
WriteJpeg(*texture.GetCubeMapNegZ(i));
else
save_file_->WriteData(texture.GetCubeMapNegZ(i)->GetBuffer(), texture.GetCubeMapNegZ(i)->GetBufferByteSize());
}
}
save_file_->Close();
return kStatusSuccess;
}
