Optimize CSS box-shadow performance

src/core/SkScalerContext.cpp

 
 /*
  * Copyright 2006 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 "SkScalerContext.h"
@@ skipping 192 matching lines @@
     }
 
     if (fMaskFilter) {
         SkMask      src, dst;
         SkMatrix    matrix;
 
         glyph->toMask(&src);
         fRec.getMatrixFrom2x2(&matrix);
 
         src.fImage = NULL;  // only want the bounds from the filter
-        if (fMaskFilter->filterMask(&dst, src, matrix, NULL)) {
+        if (fMaskFilter->filterMask(&dst, src, matrix, NULL, NULL)) {
             if (dst.fBounds.isEmpty() || !dst.fBounds.is16Bit()) {
                 goto SK_ERROR;
             }
             SkASSERT(dst.fImage == NULL);
             glyph->fLeft    = dst.fBounds.fLeft;
             glyph->fTop     = dst.fBounds.fTop;
             glyph->fWidth   = SkToU16(dst.fBounds.width());
             glyph->fHeight  = SkToU16(dst.fBounds.height());
             glyph->fMaskFormat = dst.fFormat;
         }
@@ skipping 358 matching lines @@
             srcM.fRowBytes = SkAlign4(srcM.fBounds.width());
             size_t size = srcM.computeImageSize();
             a8storage.reset(size);
             srcM.fImage = (uint8_t*)a8storage.get();
             extract_alpha(srcM,
                           (const SkPMColor*)glyph->fImage, glyph->rowBytes());
         }
 
         fRec.getMatrixFrom2x2(&matrix);
 
-        if (fMaskFilter->filterMask(&dstM, srcM, matrix, NULL)) {
+        if (fMaskFilter->filterMask(&dstM, srcM, matrix, NULL, NULL)) {
             int width = SkFastMin32(origGlyph.fWidth, dstM.fBounds.width());
             int height = SkFastMin32(origGlyph.fHeight, dstM.fBounds.height());
             int dstRB = origGlyph.rowBytes();
             int srcRB = dstM.fRowBytes;
 
             const uint8_t* src = (const uint8_t*)dstM.fImage;
             uint8_t* dst = (uint8_t*)origGlyph.fImage;
 
             if (SkMask::k3D_Format == dstM.fFormat) {
                 // we have to copy 3 times as much
@@ skipping 189 matching lines @@
 SkScalerContext* SkTypeface::createScalerContext(const SkDescriptor* desc,
                                                  bool allowFailure) const {
     SkScalerContext* c = this->onCreateScalerContext(desc);
 
     if (!c && !allowFailure) {
         c = SkNEW_ARGS(SkScalerContext_Empty,
                        (const_cast<SkTypeface*>(this), desc));
     }
     return c;
 }