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i965: Don't depth test the fake depthbuffer when one isn't present. 

For the non-separate-stencil-only case, we've been using a NULL
surface for depth, so we didn't have to care.  However, to support
separate stencil with no depthbuffer, we have to make the depth
surface non-NULL or the stencil test always fails thanks to separate
stencil inheriting the surface type of depth.

Fixes hiz-depth-stencil-test-d0-s8.

Reviewed-by: Chad Versace <chad.versace@linux.intel.com>
This commit is contained in:
Eric Anholt 2011-11-22 16:26:55 -08:00
parent e6c314f7d2
commit 09e67706e9
1 changed files with 6 additions and 1 deletions
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7
src/mesa/drivers/dri/i965/gen6_depthstencil.c
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@ -25,6 +25,7 @@
*
*/
#include "intel_fbo.h"
#include "brw_context.h"
#include "brw_state.h"
@ -33,6 +34,10 @@ gen6_upload_depth_stencil_state(struct brw_context *brw)
{
struct gl_context *ctx = &brw->intel.ctx;
struct gen6_depth_stencil_state *ds;
struct intel_renderbuffer *depth_irb;
/* _NEW_BUFFERS */
depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
ds = brw_state_batch(brw, AUB_TRACE_DEPTH_STENCIL_STATE,
sizeof(*ds), 64,
@ -77,7 +82,7 @@ gen6_upload_depth_stencil_state(struct brw_context *brw)
}
/* _NEW_DEPTH */
if (ctx->Depth.Test || brw->hiz.op) {
if ((ctx->Depth.Test || brw->hiz.op) && depth_irb) {
assert(brw->hiz.op != BRW_HIZ_OP_DEPTH_RESOLVE || ctx->Depth.Test);
assert(brw->hiz.op != BRW_HIZ_OP_HIZ_RESOLVE || !ctx->Depth.Test);
assert(brw->hiz.op != BRW_HIZ_OP_DEPTH_CLEAR || !ctx->Depth.Test);