commit bd66caa7ac38b68487778064eab10d76bc1d2e48
author Robert Phillips <robertphillips@google.com> Fri May 04 13:12:35 2018 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Fri May 04 17:54:43 2018 +0000
tree ea04baef2eb65c3e027aef6e736de9037a8b8108
parent 72de74504f09f5de17af281b363fbc114ece3e73

Make degenerate kernel in fill_in_2D_gaussian_kernel sum to 1

Bug: 836113
Change-Id: I1b2ed1d67648163571df6c497365d2a293b3b589
Reviewed-on: https://skia-review.googlesource.com/126020
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

src/gpu/effects/GrMatrixConvolutionEffect.cpp

diff --git a/src/gpu/effects/GrMatrixConvolutionEffect.cpp b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
index 56b012a..f7e6675 100644
--- a/src/gpu/effects/GrMatrixConvolutionEffect.cpp
+++ b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
@@ -220,9 +220,11 @@
 
     if (SkScalarNearlyZero(twoSigmaSqrdX, SK_ScalarNearlyZero) ||
         SkScalarNearlyZero(twoSigmaSqrdY, SK_ScalarNearlyZero)) {
+        SkASSERT(3 == width && 3 == height);
         for (int i = 0; i < width * height; ++i) {
             kernel[i] = 0.0f;
         }
+        kernel[4] = 1.0f;
         return;
     }