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lodepng: write RGB instead of RGBA: decoders differ on alpha rendering

issue480
Don Bright 2013-09-11 21:47:23 -05:00
parent 4a2255f199
commit 03a9bfd7d2
1 changed files with 3 additions and 6 deletions
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9
src/imageutils-lodepng.cc
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@ -11,12 +11,9 @@ bool write_png(std::ostream &output, unsigned char *pixels, int width, int heigh
{
std::vector<unsigned char> dataout;
lodepng::State state;
state.info_png.background_defined = true;
Color4f bg = RenderSettings::inst()->color(RenderSettings::BACKGROUND_COLOR);
state.info_png.background_r = bg(0);
state.info_png.background_g = bg(1);
state.info_png.background_b = bg(2);
state.info_png.color.colortype = LCT_RGBA;
state.encoder.auto_convert = LAC_NO;
// some png renderers have different interpretations of alpha, so don't use it
state.info_png.color.colortype = LCT_RGB;
state.info_png.color.bitdepth = 8;
unsigned err = lodepng::encode(dataout, pixels, width, height, state);
if ( err ) return false;