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Diffstat (limited to 'src/mesa/drivers/dri/r600/r700_fragprog.c')
-rw-r--r--src/mesa/drivers/dri/r600/r700_fragprog.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/r600/r700_fragprog.c b/src/mesa/drivers/dri/r600/r700_fragprog.c
index 62a1ea1a22a..3736bce11c4 100644
--- a/src/mesa/drivers/dri/r600/r700_fragprog.c
+++ b/src/mesa/drivers/dri/r600/r700_fragprog.c
@@ -251,7 +251,15 @@ GLboolean r700TranslateFragmentShader(struct r700_fragment_program *fp,
number_of_colors_exported--;
}
- fp->r700Shader.exportMode = number_of_colors_exported << 1 | z_enabled;
+ /* illegal to set this to 0 */
+ if(number_of_colors_exported || z_enabled)
+ {
+ fp->r700Shader.exportMode = number_of_colors_exported << 1 | z_enabled;
+ }
+ else
+ {
+ fp->r700Shader.exportMode = (1 << 1);
+ }
fp->translated = GL_TRUE;