scottk/UltraGrid
1
0
Fork 0
mirror of https://github.com/outbackdingo/UltraGrid.git synced 2026-03-20 09:40:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

RTDXT: corrected RGB->YUV constants

Browse Source
This commit is contained in:
Martin Pulec
2012-02-03 12:38:48 +01:00
parent 7a036562d5
commit 09cd38d4be
1 changed files with 6 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
dxt_compress/rgba_to_yuv422.glsl
View File

@@ -18,13 +18,13 @@ void main()
rgba1 = texture2D(image, coor1);
rgba2 = texture2D(image, coor2);
yuv1.x = 1.0/16.0 + rgba1.r * 0.299 + rgba1.g * 0.587 + rgba1.b * 0.114; // Y
yuv1.y = 0.5-rgba1.r * 0.168736 - rgba1.g * 0.331264 + rgba1.b * 0.5;
yuv1.z = 0.5+rgba1.r * 0.5 - rgba1.g * 0.418688 - rgba1.b * 0.081312;
yuv1.x = 1.0/16.0 + (rgba1.r * 0.299 + rgba1.g * 0.587 + rgba1.b * 0.114) * 0.8588; // Y
yuv1.y = 0.5 + (-rgba1.r * 0.168736 - rgba1.g * 0.331264 + rgba1.b * 0.5) * 0.8784;
yuv1.z = 0.5 + (rgba1.r * 0.5 - rgba1.g * 0.418688 - rgba1.b * 0.081312) * 0.8784;
yuv2.x = 1.0/16.0 + rgba2.r * 0.299 + rgba2.g * 0.587 + rgba2.b * 0.114; // Y
yuv2.y = 0.5-rgba2.r * 0.168736 - rgba2.g * 0.331264 + rgba2.b * 0.5;
yuv2.z = 0.5+rgba2.r * 0.5 - rgba2.g * 0.418688 - rgba2.b * 0.081312;
yuv2.x = 1.0/16.0 + (rgba2.r * 0.299 + rgba2.g * 0.587 + rgba2.b * 0.114) * 0.8588; // Y
yuv2.y = 0.5 + (-rgba2.r * 0.168736 - rgba2.g * 0.331264 + rgba2.b * 0.5) * 0.8784;
yuv2.z = 0.5 + (rgba2.r * 0.5 - rgba2.g * 0.418688 - rgba2.b * 0.081312) * 0.8784;
U = mix(yuv1.y, yuv2.y, 0.5);
V = mix(yuv1.z, yuv2.z, 0.5);