From: Marek Olšák <[email protected]>
---
src/mesa/main/clear.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/src/mesa/main/clear.c b/src/mesa/main/clear.c
index f0b525f..fd5bb35 100644
--- a/src/mesa/main/clear.c
+++ b/src/mesa/main/clear.c
@@ -179,7 +179,11 @@ _mesa_Clear( GLbitfield mask )
if (mask & GL_COLOR_BUFFER_BIT) {
GLuint i;
for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
- bufferMask |= (1 << ctx->DrawBuffer->_ColorDrawBufferIndexes[i]);
+ GLint buf = ctx->DrawBuffer->_ColorDrawBufferIndexes[i];
+
+ if (buf >= 0) {
+ bufferMask |= 1 << buf;
+ }
}
}
--
1.8.3.2
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