Matrix convolution bounds fix; affectsTransparentBlack fixes.

src/effects/SkMatrixConvolutionImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkMatrixConvolutionImageFilter.h"
 #include "SkBitmap.h"
 #include "SkColorPriv.h"
@@ skipping 317 matching lines @@
     bounds.fRight += fKernelSize.width() - 1;
     bounds.fBottom += fKernelSize.height() - 1;
     bounds.offset(-fKernelOffset);
     if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) {
         return false;
     }
     *dst = bounds;
     return true;
 }
 
+bool SkMatrixConvolutionImageFilter::canComputeFastBounds() const {
+    // Because the kernel is applied in device-space, we have no idea what
+    // pixels it will affect in object-space.
+    return false;
+}
+
 #if SK_SUPPORT_GPU
 
 static GrTextureDomain::Mode convert_tilemodes(
         SkMatrixConvolutionImageFilter::TileMode tileMode) {
     switch (tileMode) {
         case SkMatrixConvolutionImageFilter::kClamp_TileMode:
             return GrTextureDomain::kClamp_Mode;
         case SkMatrixConvolutionImageFilter::kRepeat_TileMode:
             return GrTextureDomain::kRepeat_Mode;
         case SkMatrixConvolutionImageFilter::kClampToBlack_TileMode:
@@ skipping 34 matching lines @@
             str->appendf("%f ", fKernel[y * fKernelSize.width() + x]);
         }
     }
     str->appendf(")");
     str->appendf("gain: %f bias: %f ", fGain, fBias);
     str->appendf("offset: (%d, %d) ", fKernelOffset.fX, fKernelOffset.fY);
     str->appendf("convolveAlpha: %s", fConvolveAlpha ? "true" : "false");
     str->append(")");
 }
 #endif