Don't blit to NULL format buffers.

This was causing crashes in Direct3D 9 applications using the "NULL" FOURCC used as a render target format for rendering to depth only. Bug 25351344 Change-Id: I69c2e0869f859489321c26dba56b7a80a2ed2f28 Reviewed-on: https://swiftshader-review.googlesource.com/5000Tested-by: Nicolas Capens <capn@google.com> Reviewed-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Nicolas Capens <capn@google.com>

Don't blit to NULL format buffers.
808074ce · Nicolas Capens · decbc133 · 808074ce
Commit 808074ce authored Mar 24, 2016 by Nicolas Capens
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Blitter.cpp src/Renderer/Blitter.cpp +5 -0

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--- a/src/Renderer/Blitter.cpp
+++ b/src/Renderer/Blitter.cpp
@@ -45,6 +45,11 @@ namespace sw
 	void Blitter::blit(Surface *source, const SliceRect &sourceRect, Surface *dest, const SliceRect &destRect, const Blitter::Options& options)
 	{
+		if(dest->getInternalFormat() == FORMAT_NULL)
+		{
+			return;
+		}
 		if(blitReactor(source, sourceRect, dest, destRect, options))
 		{
 			return;