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Added support for SDL_COLORSPACE_BT709_FULL to the hardware renderers

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This commit is contained in:
Sam Lantinga
2024-02-04 00:13:11 -08:00
parent ec322bee1c
commit dab77fe29b
55 changed files with 8405 additions and 9470 deletions
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57
src/video/SDL_pixels.c
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@@ -764,6 +764,63 @@ float SDL_PQfromNits(float v)
return pow(num / den, m2);
}
const float *SDL_GetYCbCRtoRGBConversionMatrix(SDL_Colorspace colorspace)
{
static const float matBT601Limited[] = {
-0.0627451017f, -0.501960814f, -0.501960814f, 0.0f, /* offset */
1.1644f, 0.0000f, 1.5960f, 0.0f, /* Rcoeff */
1.1644f, -0.3918f, -0.8130f, 0.0f, /* Gcoeff */
1.1644f, 2.0172f, 0.0000f, 0.0f, /* Bcoeff */
};
static const float matBT601Full[] = {
0.0f, -0.501960814f, -0.501960814f, 0.0f, /* offset */
1.0000f, 0.0000f, 1.4020f, 0.0f, /* Rcoeff */
1.0000f, -0.3441f, -0.7141f, 0.0f, /* Gcoeff */
1.0000f, 1.7720f, 0.0000f, 0.0f, /* Bcoeff */
};
static const float matBT709Limited[] = {
-0.0627451017f, -0.501960814f, -0.501960814f, 0.0f, /* offset */
1.1644f, 0.0000f, 1.7927f, 0.0f, /* Rcoeff */
1.1644f, -0.2132f, -0.5329f, 0.0f, /* Gcoeff */
1.1644f, 2.1124f, 0.0000f, 0.0f, /* Bcoeff */
};
static const float matBT709Full[] = {
0.0f, -0.501960814f, -0.501960814f, 0.0f, /* offset */
1.0000f, 0.0000f, 1.5748f, 0.0f, /* Rcoeff */
1.0000f, -0.1873f, -0.4681f, 0.0f, /* Gcoeff */
1.0000f, 1.8556f, 0.0000f, 0.0f, /* Bcoeff */
};
switch (SDL_COLORSPACEMATRIX(colorspace)) {
case SDL_MATRIX_COEFFICIENTS_BT601:
switch (SDL_COLORSPACERANGE(colorspace)) {
case SDL_COLOR_RANGE_LIMITED:
return matBT601Limited;
case SDL_COLOR_RANGE_FULL:
return matBT601Full;
default:
break;
}
break;
case SDL_MATRIX_COEFFICIENTS_BT709:
switch (SDL_COLORSPACERANGE(colorspace)) {
case SDL_COLOR_RANGE_LIMITED:
return matBT709Limited;
case SDL_COLOR_RANGE_FULL:
return matBT709Full;
default:
break;
}
break;
default:
break;
}
return NULL;
}
const float *SDL_GetColorPrimariesConversionMatrix(SDL_ColorPrimaries src, SDL_ColorPrimaries dst)
{
/* Conversion matrices generated using gamescope color helpers and the primaries definitions at:

1
src/video/SDL_pixels_c.h
View File

@@ -40,6 +40,7 @@ extern float SDL_sRGBtoNits(float v);
extern float SDL_sRGBfromNits(float v);
extern float SDL_PQtoNits(float v);
extern float SDL_PQfromNits(float v);
extern const float *SDL_GetYCbCRtoRGBConversionMatrix(SDL_Colorspace colorspace);
extern const float *SDL_GetColorPrimariesConversionMatrix(SDL_ColorPrimaries src, SDL_ColorPrimaries dst);
extern void SDL_ConvertColorPrimaries(float *fR, float *fG, float *fB, const float *matrix);