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Merge pull request #34790 from clayjohn/ETC-support-alpha 

Add support for Lum-alpha textures to ETC fallback
This commit is contained in:
Rémi Verschelde 2020-01-03 22:48:22 +01:00 committed by GitHub
parent d1133df7df cd21200944
commit db1a01501b
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 4 deletions
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13
modules/etc/image_etc.cpp
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@ -139,11 +139,16 @@ static void _compress_etc(Image *p_img, float p_lossy_quality, bool force_etc1_f
return;
}
if (img_format >= Image::FORMAT_RGBA8 && force_etc1_format) {
// If VRAM compression is using ETC, but image has alpha, convert to RGBA4444
if (force_etc1_format) {
// If VRAM compression is using ETC, but image has alpha, convert to RGBA4444 or LA8
// This saves space while maintaining the alpha channel
p_img->convert(Image::FORMAT_RGBA4444);
return;
if (detected_channels == Image::DETECTED_RGBA) {
p_img->convert(Image::FORMAT_RGBA4444);
return;
} else if (detected_channels == Image::DETECTED_LA) {
p_img->convert(Image::FORMAT_LA8);
return;
}
}
uint32_t imgw = p_img->get_width(), imgh = p_img->get_height();