Fix zero-sized buffer copies to complete successfully in BufferCopySubData.

TRAC #22878 Signed-off-by: Geoff Lang Signed-off-by: Shannon Woods Author: Jamie Madill git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2150 736b8ea6-26fd-11df-bfd4-992fa37f6226

Fix zero-sized buffer copies to complete successfully in BufferCopySubData.
c53376af · shannon.woods%transgaming.com@gtempaccount.com · 6f273e3a · c53376af
Commit c53376af authored Apr 13, 2013 by shannon.woods%transgaming.com@gtempaccount.com
Show whitespace changes
Inline Side-by-side

Showing with 4 additions and 0 deletions

libGLESv2.cpp src/libGLESv2/libGLESv2.cpp +4 -0

No files found.
--- a/src/libGLESv2/libGLESv2.cpp
+++ b/src/libGLESv2/libGLESv2.cpp
@@ -8858,9 +8858,13 @@ void __stdcall glCopyBufferSubData(GLenum readTarget, GLenum writeTarget, GLintp
            // TODO: Verify that readBuffer and writeBuffer are not currently mapped (GL_INVALID_OPERATION)
+            // if size is zero, the copy is a successful no-op
+            if (size > 0)
+            {
                writeBuffer->copyBufferSubData(readBuffer, readOffset, writeOffset, size);
            }
        }
+    }
    catch(std::bad_alloc&)
    {
        return gl::error(GL_OUT_OF_MEMORY);