Optimize CSS box-shadow performance

src/core/SkBitmap.cpp

 
 /*
  * Copyright 2008 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 "SkBitmap.h"
@@ skipping 1088 matching lines @@
     srcM.fBounds.set(0, 0, this->width(), this->height());
     srcM.fRowBytes = SkAlign4(this->width());
     srcM.fFormat = SkMask::kA8_Format;
 
     SkMaskFilter* filter = paint ? paint->getMaskFilter() : NULL;
 
     // compute our (larger?) dst bounds if we have a filter
     if (filter) {
         identity.reset();
         srcM.fImage = NULL;
-        if (!filter->filterMask(&dstM, srcM, identity, NULL)) {
+        if (!filter->filterMask(&dstM, srcM, identity, NULL, NULL)) {
             goto NO_FILTER_CASE;
         }
         dstM.fRowBytes = SkAlign4(dstM.fBounds.width());
     } else {
     NO_FILTER_CASE:
         tmpBitmap.setInfo(SkImageInfo::MakeA8(this->width(), this->height()), srcM.fRowBytes);
         if (!tmpBitmap.tryAllocPixels(allocator, NULL)) {
             // Allocation of pixels for alpha bitmap failed.
             SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n",
                     tmpBitmap.width(), tmpBitmap.height());
             return false;
         }
         GetBitmapAlpha(*this, tmpBitmap.getAddr8(0, 0), srcM.fRowBytes);
         if (offset) {
             offset->set(0, 0);
         }
         tmpBitmap.swap(*dst);
         return true;
     }
     srcM.fImage = SkMask::AllocImage(srcM.computeImageSize());
     SkAutoMaskFreeImage srcCleanup(srcM.fImage);
 
     GetBitmapAlpha(*this, srcM.fImage, srcM.fRowBytes);
-    if (!filter->filterMask(&dstM, srcM, identity, NULL)) {
+    if (!filter->filterMask(&dstM, srcM, identity, NULL, NULL)) {
         goto NO_FILTER_CASE;
     }
     SkAutoMaskFreeImage dstCleanup(dstM.fImage);
 
     tmpBitmap.setInfo(SkImageInfo::MakeA8(dstM.fBounds.width(), dstM.fBounds.height()),
                       dstM.fRowBytes);
     if (!tmpBitmap.tryAllocPixels(allocator, NULL)) {
         // Allocation of pixels for alpha bitmap failed.
         SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n",
                 tmpBitmap.width(), tmpBitmap.height());
@@ skipping 236 matching lines @@
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifdef SK_DEBUG
 void SkImageInfo::validate() const {
     SkASSERT(fWidth >= 0);
     SkASSERT(fHeight >= 0);
     SkASSERT(SkColorTypeIsValid(fColorType));
     SkASSERT(SkAlphaTypeIsValid(fAlphaType));
 }
 #endif