draw: don't crash if GS doesn't emit anything

[mesa.git] / src / gallium / auxiliary / postprocess / pp_run.c

diff --git a/src/gallium/auxiliary/postprocess/pp_run.c b/src/gallium/auxiliary/postprocess/pp_run.c
index 112458f384edaefdee4c9ab8476837fd294b494b..8b3f451640ae80ba9c13315a4d4cfb43aaa6b034 100644 (file)
--- a/src/gallium/auxiliary/postprocess/pp_run.c
+++ b/src/gallium/auxiliary/postprocess/pp_run.c
@@ -18,7 +18,7 @@
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -82,6 +82,8 @@ pp_run(struct pp_queue_t *ppq, struct pipe_resource *in,
    cso_save_vertex_shader(cso);
    cso_save_viewport(cso);
    cso_save_aux_vertex_buffer_slot(cso);
+   cso_save_constant_buffer_slot0(cso, PIPE_SHADER_VERTEX);
+   cso_save_constant_buffer_slot0(cso, PIPE_SHADER_FRAGMENT);
    cso_save_render_condition(cso);
 
    /* set default state */
@@ -141,6 +143,8 @@ pp_run(struct pp_queue_t *ppq, struct pipe_resource *in,
    cso_restore_vertex_shader(cso);
    cso_restore_viewport(cso);
    cso_restore_aux_vertex_buffer_slot(cso);
+   cso_restore_constant_buffer_slot0(cso, PIPE_SHADER_VERTEX);
+   cso_restore_constant_buffer_slot0(cso, PIPE_SHADER_FRAGMENT);
    cso_restore_render_condition(cso);
 
    pipe_resource_reference(&ppq->depth, NULL);
@@ -166,7 +170,6 @@ void
 pp_filter_setup_out(struct program *p, struct pipe_resource *out)
 {
    p->surf.format = out->format;
-   p->surf.usage = PIPE_BIND_RENDER_TARGET;
 
    p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, out, &p->surf);
 }