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Diffstat (limited to 'docs/MESA_ycbcr_texture.spec')
| -rw-r--r-- | docs/MESA_ycbcr_texture.spec | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/docs/MESA_ycbcr_texture.spec b/docs/MESA_ycbcr_texture.spec index 1fbb1e135cb..e4b896707a9 100644 --- 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 |