Revert of remove unused SkAvoidXfermode

samplecode/SampleAll.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SampleCode.h"
 #include "SkBlurMask.h"
 #include "SkCanvas.h"
 #include "SkView.h"
 #include "Sk1DPathEffect.h"
 #include "Sk2DPathEffect.h"
+#include "SkAvoidXfermode.h"
 #include "SkBlurMaskFilter.h"
 #include "SkColorFilter.h"
 #include "SkColorPriv.h"
 #include "SkCornerPathEffect.h"
 #include "SkDashPathEffect.h"
 #include "SkDiscretePathEffect.h"
 #include "SkEmbossMaskFilter.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkGradientShader.h"
@@ skipping 541 matching lines @@
             canvas->drawText(str.c_str(), str.size(), x, y, paint);
             SkRect  oval = { x, y - SkIntToScalar(40), x + SkIntToScalar(40), y };
             paint.setStyle(SkPaint::kStroke_Style);
             canvas->drawOval(oval, paint);
             paint.setStyle(SkPaint::kFill_Style);
 
             y += paint.getFontSpacing();
         }
 
         canvas->restore();
+
+        if (1) {
+            SkAutoTUnref<SkAvoidXfermode> mode(SkAvoidXfermode::Create(SK_ColorWHITE, 0xFF,
+                                   SkAvoidXfermode::kTargetColor_Mode));
+            SkPaint paint;
+            x += SkIntToScalar(20);
+            SkRect  r = { x, 0, x + SkIntToScalar(360), SkIntToScalar(700) };
+            paint.setXfermode(mode);
+            paint.setColor(SK_ColorGREEN);
+            paint.setAntiAlias(true);
+            canvas->drawOval(r, paint);
+        }
     }
 
 private:
     SkPoint fClickPt;
     SkBitmap fBug, fTb, fTx;
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new DemoView; }
 static SkViewRegister reg(MyFactory);