Mesa (master): Revert "i965: For color clears, only disable writes to components that exist."

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: 4c79f088c0ef8d36b0c57d5005743768d8c5f3e9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4c79f088c0ef8d36b0c57d5005743768d8c5f3e9

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Fri Mar 21 17:02:41 2014 -0700

Revert "i965: For color clears, only disable writes to components that exist."

This reverts commit 2919c3fdb40cf457f2e47f378a46f4cefa9e9f6d.

For formats like BGRX, looping through 0..num_components works fine.
But for formats like XRGB, we'd check the color mask for X and fail to
check it for B.

---

 src/mesa/drivers/dri/i965/brw_blorp_clear.cpp |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_blorp_clear.cpp b/src/mesa/drivers/dri/i965/brw_blorp_clear.cpp
index 433f63e..76f8299 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp_clear.cpp
+++ b/src/mesa/drivers/dri/i965/brw_blorp_clear.cpp
@@ -231,7 +231,7 @@ brw_blorp_clear_params::brw_blorp_clear_params(struct brw_context *brw,
    /* Constant color writes ignore everyting in blend and color calculator
     * state.  This is not documented.
     */
-   for (int i = 0; i < _mesa_format_num_components(irb->mt->format); i++) {
+   for (int i = 0; i < 4; i++) {
       if (!color_mask[i]) {
          color_write_disable[i] = true;
          wm_prog_key.use_simd16_replicated_data = false;