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Slightly refactor/fix/change/improve WebP config #17

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Slightly refactor/fix/change/improve WebP config #17

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ede13d9
Slightly refactor/fix/change/improve WebP config
goodusername123 Oct 7, 2024
f1cb727
Activate SharpYUV for lossy WebP encoding
goodusername123 Oct 7, 2024
daf145d
WebP: Rise default lossless effort from `-z 3` to `-z 5`
goodusername123 Oct 11, 2024
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12 changes: 9 additions & 3 deletions Source/FreeImage/PluginWebP.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -471,20 +471,26 @@ EncodeImage(FIMEMORY *hmem, FIBITMAP *dib, int flags) {
WebPConfigInit(&config);

config.thread_level = 1;
// quality/speed trade-off (0=fast, 6=slower-better)
config.method = 0;

config.exact = (flags & WEBP_EXACT) == WEBP_EXACT;

if((flags & WEBP_LOSSLESS) == WEBP_LOSSLESS) {
// lossless encoding
config.lossless = 1;
config.quality = 100;
// size/speed trade-off (method 0 and quality 0 = lowest effort but largest file-size while method 6 and quality 100 = highest effort and smallest file-size. NOTE: "quality" in this context is NOT related to anything visual)
config.method = 4;
config.quality = 50;

picture.use_argb = 1;

} else if((flags & 0x7F) > 0) {
// lossy encoding
config.lossless = 0;
// quality/speed trade-off (0=fast, 6=slower-better)
config.method = 5;
//config.autofilter = 1; // improves lossy quality but is NOTICEABLY slower
config.use_sharp_yuv = 1; // "config.preprocessing = 4;" is the old/alternative way to activate SharpYUV. NOTE: in some rare'ish cases SharpYUV can cause some colors to be more red then they should be

// quality is between 1 (smallest file) and 100 (biggest) - default to 75
config.quality = (float)(flags & 0x7F);
if(config.quality > 100) {
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