bool ImageWriter::convert( Image* image )
{
#pragma TODO("Fix the LodePNG image writing code to the new API")
#if defined(ENABLE_IMAGE_WRITER_)
LodePNG::Encoder encoder;
LodePNG_InfoColor& png = encoder.getInfoPng().color;
LodePNG_InfoColor& raw = encoder.getInfoRaw().color;
switch(image->getPixelFormat())
{
case PixelFormat::Depth:
png.colorType = 0;
raw.colorType = 0;
break;
case PixelFormat::R8G8B8:
png.colorType = 2;
raw.colorType = 2;
break;
case PixelFormat::R8G8B8A8:
png.colorType = 6;
raw.colorType = 6;
break;
default:
LogError("Pixel format is not supported");
return false;
}
raw.bitDepth = 8;
encoder.encode(output, image->getBuffer(),
image->getWidth(), image->getHeight());
if( encoder.hasError() )
{
LogError("Could not encode image to PNG");
return false;
}
return true;
#else
return false;
#endif
}
void FW::exportLodePngImage(OutputStream& stream, const Image* image)
{
// Select format and convert.
FW_ASSERT(image);
const Vec2i& size = image->getSize();
bool hasAlpha = image->getFormat().hasChannel(ImageFormat::ChannelType_A);
ImageFormat::ID format = (hasAlpha) ? ImageFormat::R8_G8_B8_A8 : ImageFormat::R8_G8_B8;
Image* converted = NULL;
if (image->getFormat().getID() != format)
{
converted = new Image(size, format);
*converted = *image;
}
// Encode image.
LodePNG::Encoder encoder;
int colorType = (hasAlpha) ? 6 : 2;
encoder.getSettings().autoLeaveOutAlphaChannel = false;
encoder.getInfoRaw().color.colorType = colorType;
encoder.getInfoPng().color.colorType = colorType;
std::vector<U8> dataBuffer;
encoder.encode(dataBuffer, (U8*)((converted) ? converted : image)->getPtr(), size.x, size.y);
if (encoder.hasError())
setError("exportLodePngImage(): LodePNG error %d!", encoder.getError());
// Write to the output stream.
if (!hasError() && !dataBuffer.empty())
stream.write(&dataBuffer[0], (int)dataBuffer.size());
// Clean up.
delete converted;
}