python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2024-12-25 01:16:16 +03:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #6 from radarhere/bc6h_gamma

Browse Source 
Removed gamma correction
This commit is contained in:
ShadelessFox 2022-10-10 14:35:13 +02:00 committed by GitHub
commit 00d59a9867
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 3 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
Tests/images/bc6h.png
View File

Binary file not shown.
Side by Side Swipe Overlay

Before

Width:  |  Height:  |  Size: 28 KiB

After

Width:  |  Height:  |  Size: 25 KiB

BIN
Tests/images/bc6h_sf.png
View File

Binary file not shown.
Side by Side Swipe Overlay

Before

Width:  |  Height:  |  Size: 28 KiB

After

Width:  |  Height:  |  Size: 25 KiB

11
src/libImaging/BcnDecode.c
View File

@ -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
bc6_lerp(rgba *col, int *e0, int *e1, int s, int sign) {
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;
g = (e0[1] * t + e1[1] * s) >> 6;
b = (e0[2] * t + e1[2] * s) >> 6;
col->r = bc6_clamp(bc6_gamma_correct(bc6_finalize(r, sign), 2.2f));
col->g = bc6_clamp(bc6_gamma_correct(bc6_finalize(g, sign), 2.2f));
col->b = bc6_clamp(bc6_gamma_correct(bc6_finalize(b, sign), 2.2f));
col->r = bc6_clamp(bc6_finalize(r, sign));
col->g = bc6_clamp(bc6_finalize(g, sign));
col->b = bc6_clamp(bc6_finalize(b, sign));
}
static void