Revert "Revert "speed up A8 by creating a new entry-point in SkDraw that blits the path's coverage …

src/core/SkDraw.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 "SkDraw.h"
 #include "SkBlitter.h"
 #include "SkBounder.h"
@@ skipping 41 matching lines @@
 #define kBlitterStorageLongCount    (sizeof(SkBitmapProcShader) >> 2)
 
 /** Helper for allocating small blitters on the stack.
  */
 class SkAutoBlitterChoose : SkNoncopyable {
 public:
     SkAutoBlitterChoose() {
         fBlitter = NULL;
     }
     SkAutoBlitterChoose(const SkBitmap& device, const SkMatrix& matrix,
-                        const SkPaint& paint) {
+                        const SkPaint& paint, bool drawCoverage = false) {
         fBlitter = SkBlitter::Choose(device, matrix, paint,
-                                     fStorage, sizeof(fStorage));
+                                     fStorage, sizeof(fStorage), drawCoverage);
     }
 
     ~SkAutoBlitterChoose();
 
     SkBlitter*  operator->() { return fBlitter; }
     SkBlitter*  get() const { return fBlitter; }
 
     void choose(const SkBitmap& device, const SkMatrix& matrix,
                 const SkPaint& paint) {
         SkASSERT(!fBlitter);
@@ skipping 941 matching lines @@
     SkScalar len0 = fast_len(dst[0]);
     SkScalar len1 = fast_len(dst[1]);
     if (len0 <= SK_Scalar1 && len1 <= SK_Scalar1) {
         *coverage = SkScalarAve(len0, len1);
         return true;
     }
     return false;
 }
 
 void SkDraw::drawPath(const SkPath& origSrcPath, const SkPaint& origPaint,
-                      const SkMatrix* prePathMatrix, bool pathIsMutable) const {
+                      const SkMatrix* prePathMatrix, bool pathIsMutable,
+                      bool drawCoverage) const {
     SkDEBUGCODE(this->validate();)
 
     // nothing to draw
     if (fRC->isEmpty()) {
         return;
     }
 
     SkPath*         pathPtr = (SkPath*)&origSrcPath;
     bool            doFill = true;
     SkPath          tmpPath;
@@ skipping 68 matching lines @@
         }
         return;
     }
 
     // avoid possibly allocating a new path in transform if we can
     SkPath* devPathPtr = pathIsMutable ? pathPtr : &tmpPath;
 
     // transform the path into device space
     pathPtr->transform(*matrix, devPathPtr);
 
-    SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, *paint);
+    SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, *paint, drawCoverage);
 
     if (paint->getMaskFilter()) {
         SkPaint::Style style = doFill ? SkPaint::kFill_Style :
             SkPaint::kStroke_Style;
         if (paint->getMaskFilter()->filterPath(*devPathPtr, *fMatrix, *fRC,
                                                fBounder, blitter.get(),
                                                style)) {
             return; // filterPath() called the blitter, so we're done
         }
     }
@@ skipping 1700 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }