Use the main thread for draw execution when single-threaded.

Bug 23073037 Change-Id: I47d5a7d80dc48dffae0014fbf619810290c30628 Reviewed-on: https://swiftshader-review.googlesource.com/3840Reviewed-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Greg Hartman <ghartman@google.com> Reviewed-by: Nicolas Capens <capn@google.com> Tested-by: Nicolas Capens <capn@google.com>

Use the main thread for draw execution when single-threaded.
20248ddb · Nicolas Capens · ffec96c1 · 20248ddb
Commit 20248ddb authored Aug 10, 2015 by Nicolas Capens
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Renderer.cpp src/Renderer/Renderer.cpp +10 -0

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--- a/src/Renderer/Renderer.cpp
+++ b/src/Renderer/Renderer.cpp
@@ -610,6 +610,8 @@ namespace sw
 			nextDraw++;
 			schedulerMutex.unlock();

+			if(threadCount > 1)
+			{
 				if(!threadsAwake)
 				{
 					suspend[0]->wait();
@@ -620,6 +622,14 @@ namespace sw
 					resume[0]->signal();
 				}
 			}
+			else   // Use main thread for draw execution
+			{
+				threadsAwake = 1;
+				task[0].type = Task::RESUME;
+
+				taskLoop(0);
+			}
+		}
 	}

 	void Renderer::threadFunction(void *parameters)