util/blit: document params to util_blit_pixels_writemask()

2010-01-19 18:00:26 -07:00
parent 031f23ac3a
commit 1658f80153
1 changed files with 4 additions and 0 deletions
@@ -262,6 +262,10 @@ regions_overlap(int srcX0, int srcY0,
 * Copy pixel block from src surface to dst surface.
 * Overlapping regions are acceptable.
 * Flipping and stretching are supported.
+ * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
+ * \param writemask  controls which channels in the dest surface are sourced
+ *                   from the src surface.  Disabled channels are sourced
+ *                   from (0,0,0,1).
 * XXX what about clipping???
 * XXX need some control over blitting Z and/or stencil.
 */