void LodePNG::save(const ColorImageR8G8B8A8 &image, const std::string &filename)
{
const UINT pixelCount = image.getWidth()*image.getHeight();
//
// images should be saved with no transparency, which unfortunately requires us to make a copy of the bitmap data.
//
RGBColor *copy = new RGBColor[pixelCount];
memcpy(copy, image.getPointer(), pixelCount * 4);
for (UINT i = 0; i < pixelCount; i++)
copy[i].a = 255;
lodepng::encode(filename, (const BYTE *)copy, image.getWidth(), image.getHeight(), LodePNGColorType::LCT_RGBA);
delete[] copy;
}
ColorImageR8G8B8A8 LodePNG::load(const std::string &filename)
{
if (!ml::util::fileExists(filename))
{
std::cout << ("LodePNG::load file not found: " + filename);
return ColorImageR8G8B8A8();
}
std::vector<BYTE> image;
UINT width, height;
UINT error = lodepng::decode(image, width, height, filename);
MLIB_ASSERT_STR(!error, std::string(lodepng_error_text(error)) + ": " + filename);
ColorImageR8G8B8A8 result;
if (!error)
{
result.allocate(width, height);
memcpy(result.getPointer(), &image[0], 4 * width * height);
}
return result;
}
