The resolve code looks at the current color draw buffers. These are not
valid until intel_prepare_render() is called. You can end up with one
color buffer bound, but where the renderbuffer has zero width/height and
no miptree allocated.
You can get a call chain like: _mesa_Clear -> _mesa_update_state ->
intel_update_state, where no brw driver hooks were called, so there is
no other point at which we could have called this.
Fixes crashes in KWin where Clear was causing intel_disable_rb_aux_buffer
to crash on irb != NULL but irb->mt == NULL.
Tested-by: Tobias Klausmann <tobias.johannes.klausm...@mni.thm.de>
Cc: Jason Ekstrand <ja...@jlekstrand.net>
---
src/mesa/drivers/dri/i965/brw_context.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_context.c
b/src/mesa/drivers/dri/i965/brw_context.c
index 6d27866fcea..5433f9080ee 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -201,6 +201,8 @@ intel_update_state(struct gl_context * ctx)
_mesa_unlock_context_textures(ctx);
+ intel_prepare_render(brw);
+
/* Resolve the depth buffer's HiZ buffer. */
depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
if (depth_irb && depth_irb->mt) {
--
2.13.0
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