[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [49141] branches/soc-2011-tomato/intern/ cycles/device/device_cuda.cpp: Tomato Cycles: ability to cancel rendering before tile was fully rendered

[Sergey Sharybin]

Revision: 49141
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=49141
Author:   nazgul
Date:     2012-07-23 13:51:29 +0000 (Mon, 23 Jul 2012)
Log Message:
-----------
Tomato Cycles: ability to cancel rendering before tile was fully rendered

Seems this requred cuda context synchronization after every finished sample,
which could give few percent of slowdown. In test made here it was only minor
slowdown, so think it's pretty much acceptable for now.

Modified Paths:
--------------
    branches/soc-2011-tomato/intern/cycles/device/device_cuda.cpp

Modified: branches/soc-2011-tomato/intern/cycles/device/device_cuda.cpp
===================================================================
--- branches/soc-2011-tomato/intern/cycles/device/device_cuda.cpp	2012-07-23 13:33:09 UTC (rev 49140)
+++ branches/soc-2011-tomato/intern/cycles/device/device_cuda.cpp	2012-07-23 13:51:29 UTC (rev 49141)
@@ -834,12 +834,17 @@
 				int start_sample = tile.start_sample;
 				int end_sample = tile.start_sample + tile.num_samples;
 
-				for(int sample = start_sample; sample < end_sample; sample++)
+				for(int sample = start_sample; sample < end_sample; sample++) {
+					if (task->get_cancel()) {
+						break;
+					}
+
 					path_trace(tile, sample);
 
-				cuda_push_context();
-				cuda_assert(cuCtxSynchronize())
-				cuda_pop_context();
+					cuda_push_context();
+					cuda_assert(cuCtxSynchronize())
+					cuda_pop_context();
+				}
 
 				task->release_tile(tile);
 			}