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i965: Emitting 3DSTATE_SO_BUFFER of 0-size. 

Avoided filling of whole structure and bo-allocation if
size of surface is 0.

Signed-off-by: Sergii Romantsov <sergii.romantsov@globallogic.com>
This commit is contained in:
Sergii Romantsov 2018-08-15 15:21:47 +03:00 committed by Kenneth Graunke
parent 98b3b6367a
commit efb28aa970
1 changed files with 5 additions and 4 deletions
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9
src/mesa/drivers/dri/i965/genX_state_upload.c
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@ -3787,19 +3787,20 @@ genX(upload_3dstate_so_buffers)(struct brw_context *brw)
for (int i = 0; i < 4; i++) {
struct intel_buffer_object *bufferobj =
intel_buffer_object(xfb_obj->Buffers[i]);
uint32_t start = xfb_obj->Offset[i];
uint32_t end = ALIGN(start + xfb_obj->Size[i], 4);
uint32_t const size = end - start;
if (!bufferobj) {
if (!bufferobj || !size) {
brw_batch_emit(brw, GENX(3DSTATE_SO_BUFFER), sob) {
sob.SOBufferIndex = i;
}
continue;
}
uint32_t start = xfb_obj->Offset[i];
assert(start % 4 == 0);
uint32_t end = ALIGN(start + xfb_obj->Size[i], 4);
struct brw_bo *bo =
intel_bufferobj_buffer(brw, bufferobj, start, end - start, true);
intel_bufferobj_buffer(brw, bufferobj, start, size, true);
assert(end <= bo->size);
brw_batch_emit(brw, GENX(3DSTATE_SO_BUFFER), sob) {