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Expose colour_mix() to backends (and others)

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Quite a few backends currently generate colours by multiplying the
foreground colour by a fraction, effectively mixing it with black.  On a
black background, this might be reasonably replaced by mixing the
background colour with white, but that's rather arithmetically fiddly.
Happily, I already have a function for that and just need to expose it.
This commit is contained in:
Ben Harris
2022-12-17 22:50:52 +00:00
parent 425942c852
commit cdd24fd459
3 changed files with 18 additions and 2 deletions
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3
misc.c
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@ -207,8 +207,7 @@ static float colour_distance(const float a[3], const float b[3])
(a[2]-b[2]) * (a[2]-b[2]));
}
static void colour_mix(const float src1[3], const float src2[3],
float p, float dst[3])
void colour_mix(const float src1[3], const float src2[3], float p, float dst[3])
{
int i;
for (i = 0; i < 3; i++)