Revert[8] "replace SkXfermode obj with SkBlendMode enum in paints"

src/core/SkBlitter_Sprite.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 "SkOpts.h"
 #include "SkSmallAllocator.h"
 #include "SkSpriteBlitter.h"
@@ skipping 50 matching lines @@
         }
         if (dst.info().gammaCloseToSRGB() != src.info().gammaCloseToSRGB()) {
             return false;
         }
         if (paint.getMaskFilter() || paint.getColorFilter() || paint.getImageFilter()) {
             return false;
         }
         if (0xFF != paint.getAlpha()) {
             return false;
         }
-        SkXfermode::Mode mode;
-        if (!SkXfermode::AsMode(paint.getXfermode(), &mode)) {
-            return false;
-        }
-        if (SkXfermode::kSrc_Mode == mode) {
+        SkBlendMode mode = paint.getBlendMode();
+        if (SkBlendMode::kSrc == mode) {
             return true;
         }
-        if (SkXfermode::kSrcOver_Mode == mode && src.isOpaque()) {
+        if (SkBlendMode::kSrcOver == mode && src.isOpaque()) {
             return true;
         }
 
         // At this point memcpy can't be used. The following check for using SrcOver.
 
         if (dst.colorType() != kN32_SkColorType || !dst.info().gammaCloseToSRGB()) {
             return false;
         }
 
-        return SkXfermode::kSrcOver_Mode == mode;
+        return SkBlendMode::kSrcOver == mode;
     }
 
     SkSpriteBlitter_Src_SrcOver(const SkPixmap& src)
         : INHERITED(src) {}
 
     void setup(const SkPixmap& dst, int left, int top, const SkPaint& paint) override {
         SkASSERT(Supports(dst, fSource, paint));
         this->INHERITED::setup(dst, left, top, paint);
-        SkXfermode::Mode mode;
-        if (!SkXfermode::AsMode(paint.getXfermode(), &mode)) {
-            SkFAIL("Should never happen.");
-        }
+        SkBlendMode mode = paint.getBlendMode();
 
-        SkASSERT(mode == SkXfermode::kSrcOver_Mode || mode == SkXfermode::kSrc_Mode);
+        SkASSERT(mode == SkBlendMode::kSrcOver || mode == SkBlendMode::kSrc);
 
-        if (mode == SkXfermode::kSrcOver_Mode && !fSource.isOpaque()) {
+        if (mode == SkBlendMode::kSrcOver && !fSource.isOpaque()) {
             fUseMemcpy = false;
         }
     }
 
     void blitRect(int x, int y, int width, int height) override {
         SkASSERT(fDst.colorType() == fSource.colorType());
         SkASSERT(fDst.info().gammaCloseToSRGB() == fSource.info().gammaCloseToSRGB());
         SkASSERT(width > 0 && height > 0);
 
         if (fUseMemcpy) {
@@ skipping 71 matching lines @@
             default:
                 break;
         }
     }
 
     if (blitter) {
         blitter->setup(dst, left, top, paint);
     }
     return blitter;
 }