Fix potential division by zero.

Bug 25351344

Change-Id: Iaf0ce657a3a98c9b70902240340ed5f3f8076281
Reviewed-on: https://swiftshader-review.googlesource.com/4769
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

diff --git a/src/Renderer/Surface.cpp b/src/Renderer/Surface.cpp
index 9e739d9..334844b 100644 (file)
--- a/src/Renderer/Surface.cpp
+++ b/src/Renderer/Surface.cpp
@@ -1169,9 +1169,9 @@ namespace sw
                external.format = format;
                external.bytes = bytes(external.format);
                external.pitchB = pitch;
-               external.pitchP = pitch / external.bytes;
+               external.pitchP = external.bytes ? pitch / external.bytes : 0;
                external.sliceB = slice;
-               external.sliceP = slice / external.bytes;
+               external.sliceP = external.bytes ? slice / external.bytes : 0;
                external.lock = LOCK_UNLOCKED;
                external.dirty = true;