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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
puzzles.h
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@ -374,6 +374,9 @@ char *fgetline(FILE *fp);
char *bin2hex(const unsigned char *in, int inlen);
unsigned char *hex2bin(const char *in, int outlen);
/* Mixes two colours in specified proportions. */
void colour_mix(const float src1[3], const float src2[3], float p,
float dst[3]);
/* Sets (and possibly dims) background from frontend default colour,
* and auto-generates highlight and lowlight colours too. */
void game_mkhighlight(frontend *fe, float *ret,