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util/srgb: Add a float sRGB -> linear helper

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Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Jason Ekstrand 2017-06-22 20:00:47 -07:00 • committed by Nanley Chery
parent cd5ce363e3
commit b55077a8bc
1 changed files with 14 additions and 0 deletions
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14
src/util/format_srgb.h
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@ -54,6 +54,20 @@ extern const unsigned
util_format_linear_to_srgb_helper_table[104];
static inline float
util_format_srgb_to_linear_float(float cs)
{
if (cs <= 0.0f)
return 0.0f;
else if (cs <= 0.04045f)
return cs / 12.92f;
else if (cs < 1.0f)
return powf((cs + 0.055) / 1.055f, 2.4f);
else
return 1.0f;
}
static inline float
util_format_linear_to_srgb_float(float cl)
{