assorted updates

[mesa.git] / docs / MESA_ycbcr_texture.spec

diff --git a/docs/MESA_ycbcr_texture.spec b/docs/MESA_ycbcr_texture.spec
index 1fbb1e135cba31550c14c2c5e455c650e39683b5..e4b896707a93a890e5a62ffb82d17f1ead272f6d 100644 (file)
--- a/docs/MESA_ycbcr_texture.spec
+++ b/docs/MESA_ycbcr_texture.spec
@@ -31,11 +31,12 @@ Dependencies
 
 Overview
 
-    This extension supports texture images in the YCbCr format.  There is
-    no support for converting YCbCr images to RGB or vice versa.  The
-    texture's YCbCr colors are converted to RGB during texture sampling.
-    Only 2D texture images are supported (not glDrawPixels, glReadPixels,
-    etc).
+    This extension supports texture images stored in the YCbCr format.
+    There is no support for converting YCbCr images to RGB or vice versa
+    during pixel transfer.  The texture's YCbCr colors are converted to
+    RGB during texture sampling, after-which, all the usual per-fragment
+    operations take place.  Only 2D texture images are supported (not
+    glDrawPixels, glReadPixels, etc).
 
     A YCbCr pixel (texel) is a 16-bit unsigned short with two components.
     The first component is luminance (Y).  For pixels in even-numbered
@@ -196,3 +197,4 @@ Revision History
 
     20 September 2002 - Initial draft
     29 April 2003 - minor updates
+     3 September 2003 - further clarify when YCbCr->RGB conversion takes place