i965: Do not set front_buffer_dirty if there is no front buffer

[mesa.git] / src / mesa / drivers / dri / i965 / brw_context.c

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 2676382b48920afbb394c019fb4164ba098de3cc..16f987812fc463ecfd1d6fa627232c14d226a792 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -1523,8 +1523,10 @@ intel_prepare_render(struct brw_context *brw)
     * that will happen next will probably dirty the front buffer.  So
     * mark it as dirty here.
     */
-   if (_mesa_is_front_buffer_drawing(ctx->DrawBuffer))
+   if (_mesa_is_front_buffer_drawing(ctx->DrawBuffer) &&
+       ctx->DrawBuffer != _mesa_get_incomplete_framebuffer()) {
       brw->front_buffer_dirty = true;
+   }
 
    if (brw->is_shared_buffer_bound) {
       /* Subsequent rendering will probably dirty the shared buffer. */