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Fixed converting full range YUV to RGB

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Updated from https://kdashg.github.io/misc/colors/from-coeffs.html

I'm not sure where the other formulas came from, but they weren't mathematically correct and resulted in slightly incorrect colors.
This commit is contained in:
Sam Lantinga
2024-10-11 18:08:47 -07:00
parent 3086b25c4e
commit 3cd7e22e8b
1 changed files with 6 additions and 6 deletions
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12
src/video/SDL_pixels.c
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@@ -772,9 +772,9 @@ static const float mat_BT601_Limited_8bit[] = {
static const float mat_BT601_Full_8bit[] = { static const float mat_BT601_Full_8bit[] = {
0.0f, -0.501960814f, -0.501960814f, 0.0f, // offset 0.0f, -0.501960814f, -0.501960814f, 0.0f, // offset
1.0000f, 0.0000f, 1.4020f, 0.0f, // Rcoeff 1.0000f, 0.0000f, 1.4075f, 0.0f, // Rcoeff
1.0000f, -0.3441f, -0.7141f, 0.0f, // Gcoeff 1.0000f, -0.3455f, -0.7169f, 0.0f, // Gcoeff
1.0000f, 1.7720f, 0.0000f, 0.0f, // Bcoeff 1.0000f, 1.7790f, 0.0000f, 0.0f, // Bcoeff
}; };
static const float mat_BT709_Limited_8bit[] = { static const float mat_BT709_Limited_8bit[] = {
@@ -786,9 +786,9 @@ static const float mat_BT709_Limited_8bit[] = {
static const float mat_BT709_Full_8bit[] = { static const float mat_BT709_Full_8bit[] = {
0.0f, -0.501960814f, -0.501960814f, 0.0f, // offset 0.0f, -0.501960814f, -0.501960814f, 0.0f, // offset
1.0000f, 0.0000f, 1.5748f, 0.0f, // Rcoeff 1.0000f, 0.0000f, 1.5810f, 0.0f, // Rcoeff
1.0000f, -0.1873f, -0.4681f, 0.0f, // Gcoeff 1.0000f, -0.1881f, -0.4700f, 0.0f, // Gcoeff
1.0000f, 1.8556f, 0.0000f, 0.0f, // Bcoeff 1.0000f, 1.8629f, 0.0000f, 0.0f, // Bcoeff
}; };
static const float mat_BT2020_Limited_10bit[] = { static const float mat_BT2020_Limited_10bit[] = {