Mesa (master): util/blitter: allow NULL clear color

[Marek Olšák]

Module: Mesa
Branch: master
Commit: fa552261ea1795503d051864af6cdf05cb7197ae
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=fa552261ea1795503d051864af6cdf05cb7197ae

Author: Marek Olšák <maraeo at gmail.com>
Date:   Sun May 23 19:00:56 2010 +0200

util/blitter: allow NULL clear color

---

 src/gallium/auxiliary/util/u_blitter.c |   19 ++++++++++++++-----
 1 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index e0bd891..c2d1af3 100644
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -371,11 +371,20 @@ static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 {
    int i;
 
-   for (i = 0; i < 4; i++) {
-      ctx->vertices[i][1][0] = rgba[0];
-      ctx->vertices[i][1][1] = rgba[1];
-      ctx->vertices[i][1][2] = rgba[2];
-      ctx->vertices[i][1][3] = rgba[3];
+   if (rgba) {
+       for (i = 0; i < 4; i++) {
+          ctx->vertices[i][1][0] = rgba[0];
+          ctx->vertices[i][1][1] = rgba[1];
+          ctx->vertices[i][1][2] = rgba[2];
+          ctx->vertices[i][1][3] = rgba[3];
+       }
+   } else {
+       for (i = 0; i < 4; i++) {
+          ctx->vertices[i][1][0] = 0;
+          ctx->vertices[i][1][1] = 0;
+          ctx->vertices[i][1][2] = 0;
+          ctx->vertices[i][1][3] = 0;
+       }
    }
 }