intel: Skip the DRI2 renderbuffer update when doing Viewport on an FBO.

(cherry picked from commit d4a42b0ce6455d03be70aa56aacd779be193aca4)

diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index 5dc3df395d18f4a887b29dca32dce0b2789e1580..bff0b0547572546abadd58dfa45e45dda524fe9a 100644 (file)
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -394,7 +394,7 @@ intel_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
     if (!driContext->driScreenPriv->dri2.enabled)
        return;
 
-    if (!intel->internal_viewport_call) {
+    if (!intel->internal_viewport_call && ctx->DrawBuffer->Name == 0) {
        intel_update_renderbuffers(driContext, driContext->driDrawablePriv);
        if (driContext->driDrawablePriv != driContext->driReadablePriv)
          intel_update_renderbuffers(driContext, driContext->driReadablePriv);