commit f8cdc74c4b4afca9f1f807d9fda6ea8d530b358e
author Nicolas Capens <capn@google.com> Thu Mar 29 01:16:50 2018 -0400
committer Nicolas Capens <nicolascapens@google.com> Thu Mar 29 13:21:17 2018 +0000
tree 020bb4bf2870de0219491be555a1141dcdf05727
parent 5cd502b4ba6b04f5b2e50c19e94c75f472b620c6

Guard against copying from a zero-sized 3D image.

Bug chromium:825545

Change-Id: I37d6192bf65115938943f45d43e153196a7d569a
Reviewed-on: https://swiftshader-review.googlesource.com/18128
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

src/OpenGL/libGLESv2/Device.cpp

diff --git a/src/OpenGL/libGLESv2/Device.cpp b/src/OpenGL/libGLESv2/Device.cpp
index 6fcfba8..81238df 100644
--- a/src/OpenGL/libGLESv2/Device.cpp
+++ b/src/OpenGL/libGLESv2/Device.cpp
@@ -649,6 +649,12 @@
 		int dHeight = dest->getHeight();
 		int dDepth  = dest->getDepth();
 
+		if((sWidth == 0) || (sHeight == 0) || (sDepth == 0) ||
+		   (dWidth == 0) || (dHeight == 0) || (dDepth == 0))
+		{
+			return true; // no work to do
+		}
+
 		bool scaling = (sWidth != dWidth) || (sHeight != dHeight) || (sDepth != dDepth);
 		bool equalFormats = source->getInternalFormat() == dest->getInternalFormat();
 		bool alpha0xFF = false;