tree 6e9e1326a28b77ed21bd56418fef5f0f06834a4f
parent 4432df12e1769ceb8967dab21b5af3067234f066
author Sean Risser <srisser@google.com> 1560187761 -0400
committer Sean Risser <srisser@google.com> 1560370559 +0000

Prevent integer-overflow on scissor test

Currently we don't restrict any of the parameters (x, y, width, height)
to glScissor aside from forcing width and height to be non-negative.
This means large parameters can cause overflows during the scissor test.

So we change width/height in the cases where an overflow will happen.

Bug chromium:969071

Change-Id: Icb6992551aed6e3e086f96d89931eae0e99899a4
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/32608
Presubmit-Ready: Sean Risser <srisser@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Sean Risser <srisser@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>