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

gm/gamma.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 
 #include "Resources.h"
@@ skipping 57 matching lines @@
         }
         advance();
     };
 
     auto nextBitmap = [&](const SkBitmap& bmp, const char* label) {
         canvas->drawBitmap(bmp, 0, 0);
         canvas->drawText(label, strlen(label), 0, sz + textPaint.getFontSpacing(), textPaint);
         advance();
     };
 
-    auto nextXferRect = [&](SkColor srcColor, SkXfermode::Mode mode, SkColor dstColor) {
+    auto nextXferRect = [&](SkColor srcColor, SkBlendMode mode, SkColor dstColor) {
         p.setColor(dstColor);
         canvas->drawRect(r, p);
         p.setColor(srcColor);
-        p.setXfermodeMode(mode);
+        p.setBlendMode(mode);
         canvas->drawRect(r, p);
 
         SkString srcText = SkStringPrintf("%08X", srcColor);
         SkString dstText = SkStringPrintf("%08X", dstColor);
         canvas->drawText(srcText.c_str(), srcText.size(), 0, sz + textPaint.getFontSpacing(),
                          textPaint);
         const char* modeName = SkXfermode::ModeName(mode);
         canvas->drawText(modeName, strlen(modeName), 0, sz + 2 * textPaint.getFontSpacing(),
                          textPaint);
         canvas->drawText(dstText.c_str(), dstText.size(), 0, sz + 3 * textPaint.getFontSpacing(),
@@ skipping 107 matching lines @@
     nextRect("sRGB BMP", "Shader");
 
     // Carriage return.
     canvas->restore();
     canvas->translate(0, 2 * sz);
 
     // Xfermode tests, all done off-screen so certain modes work...
 
     canvas->saveLayer(nullptr, nullptr);
 
-    nextXferRect(0x7fffffff, SkXfermode::kSrcOver_Mode, SK_ColorBLACK);
-    nextXferRect(0x7f000000, SkXfermode::kSrcOver_Mode, SK_ColorWHITE);
+    nextXferRect(0x7fffffff, SkBlendMode::kSrcOver, SK_ColorBLACK);
+    nextXferRect(0x7f000000, SkBlendMode::kSrcOver, SK_ColorWHITE);
 
-    nextXferRect(SK_ColorBLACK, SkXfermode::kDstOver_Mode, 0x7fffffff);
-    nextXferRect(SK_ColorWHITE, SkXfermode::kSrcIn_Mode, 0x7fff00ff);
-    nextXferRect(0x7fff00ff, SkXfermode::kDstIn_Mode, SK_ColorWHITE);
+    nextXferRect(SK_ColorBLACK, SkBlendMode::kDstOver, 0x7fffffff);
+    nextXferRect(SK_ColorWHITE, SkBlendMode::kSrcIn, 0x7fff00ff);
+    nextXferRect(0x7fff00ff, SkBlendMode::kDstIn, SK_ColorWHITE);
 
     // 0x89 = 255 * linear_to_srgb(0.25)
-    nextXferRect(0xff898989, SkXfermode::kPlus_Mode, 0xff898989);
+    nextXferRect(0xff898989, SkBlendMode::kPlus, 0xff898989);
 
     // 0xDB = 255 * linear_to_srgb(sqrt(0.5))
-    nextXferRect(0xffdbdbdb, SkXfermode::kModulate_Mode, 0xffdbdbdb);
+    nextXferRect(0xffdbdbdb, SkBlendMode::kModulate, 0xffdbdbdb);
 
     canvas->restore();
 }