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Merge pull request #6 from radarhere/bc6h_gamma

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Removed gamma correction
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ShadelessFox 2022-10-10 14:35:13 +02:00 committed by GitHub
commit 00d59a9867
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3 changed files with 3 additions and 8 deletions
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11
src/libImaging/BcnDecode.c
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@ -688,11 +688,6 @@ bc6_clamp(float value) {
} }
} }
static float
bc6_gamma_correct(float value, float gamma) {
return powf(1.0f - expf(-value), 1.0f / gamma);
}
static void static void
bc6_lerp(rgba *col, int *e0, int *e1, int s, int sign) { bc6_lerp(rgba *col, int *e0, int *e1, int s, int sign) {
int r, g, b; int r, g, b;
@ -700,9 +695,9 @@ bc6_lerp(rgba *col, int *e0, int *e1, int s, int sign) {
r = (e0[0] * t + e1[0] * s) >> 6; r = (e0[0] * t + e1[0] * s) >> 6;
g = (e0[1] * t + e1[1] * s) >> 6; g = (e0[1] * t + e1[1] * s) >> 6;
b = (e0[2] * t + e1[2] * s) >> 6; b = (e0[2] * t + e1[2] * s) >> 6;
col->r = bc6_clamp(bc6_gamma_correct(bc6_finalize(r, sign), 2.2f)); col->r = bc6_clamp(bc6_finalize(r, sign));
col->g = bc6_clamp(bc6_gamma_correct(bc6_finalize(g, sign), 2.2f)); col->g = bc6_clamp(bc6_finalize(g, sign));
col->b = bc6_clamp(bc6_gamma_correct(bc6_finalize(b, sign), 2.2f)); col->b = bc6_clamp(bc6_finalize(b, sign));
} }
static void static void