radeon: Flush command buffer on viewport change

We flush the command buffer so we don't emit mixed
state (with new and previous buffer size) command
buffer, this is especialy affecting zbuffer states.

diff --git a/src/mesa/drivers/dri/radeon/radeon_common.c b/src/mesa/drivers/dri/radeon/radeon_common.c
index 466eda784efca2d891fa04bb572086890133ec3e..32fe4d5645bb10e2302e1fd4c9876000f9cd4a26 100644 (file)
--- a/src/mesa/drivers/dri/radeon/radeon_common.c
+++ b/src/mesa/drivers/dri/radeon/radeon_common.c
@@ -861,6 +861,7 @@ void radeon_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei he
        if (!driContext->driScreenPriv->dri2.enabled)
                return;
 
+       radeonFlush(ctx);
        radeon_update_renderbuffers(driContext, driContext->driDrawablePriv);
        if (driContext->driDrawablePriv != driContext->driReadablePriv)
                radeon_update_renderbuffers(driContext, driContext->driReadablePriv);