Index8 GPU and CPU raster support.

src/core/SkBitmapDevice.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkConfig8888.h"
 #include "SkDraw.h"
@@ skipping 252 matching lines @@
     } else {
         tmpSrc = bitmapBounds;
     }
     matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);
 
     const SkRect* dstPtr = &dst;
     const SkBitmap* bitmapPtr = &bitmap;
 
     // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if
     // needed (if the src was clipped). No check needed if src==null.
-    if (src) {
+    // If bitmapBounds are the same as src, go faster path bellow.
+    if (src && !(bitmapBounds == *src)) {
         if (!bitmapBounds.contains(*src)) {
             if (!tmpSrc.intersect(bitmapBounds)) {
                 return; // nothing to draw
             }
             // recompute dst, based on the smaller tmpSrc
             matrix.mapRect(&tmpDst, tmpSrc);
             dstPtr = &tmpDst;
         }
 
         // since we may need to clamp to the borders of the src rect within
@@ skipping 103 matching lines @@
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode))
     {
         return true;
     }
     return false;
 }