From 09cd38d4bea2fecd519bf8bd3f50eab501c1249b Mon Sep 17 00:00:00 2001 From: Martin Pulec Date: Fri, 3 Feb 2012 12:38:48 +0100 Subject: [PATCH] RTDXT: corrected RGB->YUV constants --- dxt_compress/rgba_to_yuv422.glsl | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/dxt_compress/rgba_to_yuv422.glsl b/dxt_compress/rgba_to_yuv422.glsl index 77950abd2..6e5f79902 100644 --- a/dxt_compress/rgba_to_yuv422.glsl +++ b/dxt_compress/rgba_to_yuv422.glsl @@ -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);