switch xfermodes over to sk_sp

samplecode/SampleXfermodesBlur.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 "SkView.h"
 #include "SkBlurMask.h"
@@ skipping 21 matching lines @@
     paint->setTypeface(face);
     SkSafeUnref(face);
 }
 
 static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
 
 class XfermodesBlurView : public SampleView {
     SkBitmap    fBG;
     SkBitmap    fSrcB, fDstB;
 
-    void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha,
+    void draw_mode(SkCanvas* canvas, sk_sp<SkXfermode> mode, int alpha,
                    SkScalar x, SkScalar y) {
         SkPaint p;
         SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
                                        SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
                                        SkBlurMaskFilter::kNone_BlurFlag);
         p.setMaskFilter(mf)->unref();
 
         SkScalar ww = SkIntToScalar(W);
         SkScalar hh = SkIntToScalar(H);
 
         // draw a circle covering the upper
         // left three quarters of the canvas
         p.setColor(0xFFCC44FF);
         SkRect r;
         r.set(0, 0, ww*3/4, hh*3/4);
         r.offset(x, y);
         canvas->drawOval(r, p);
 
-        p.setXfermode(mode);
+        p.setXfermode(std::move(mode));
 
         // draw a square overlapping the circle
         // in the lower right of the canvas
         p.setColor(0x00AA6633 | alpha << 24);
         r.set(ww/3, hh/3, ww*19/20, hh*19/20);
         r.offset(x, y);
         canvas->drawRect(r, p);
     }
 
 public:
@@ skipping 84 matching lines @@
         labelP.setLCDRenderText(true);
         labelP.setTextAlign(SkPaint::kCenter_Align);
         setNamedTypeface(&labelP, "Menlo Regular");
 
         const int W = 5;
 
         SkScalar x0 = 0;
         for (int twice = 0; twice < 2; twice++) {
             SkScalar x = x0, y = 0;
             for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
-                SkXfermode* mode = SkXfermode::Create(gModes[i].fMode);
-                SkAutoUnref aur(mode);
                 SkRect r;
                 r.set(x, y, x+w, y+h);
 
                 SkPaint p;
                 p.setStyle(SkPaint::kFill_Style);
                 p.setShader(s);
                 canvas->drawRect(r, p);
 
                 canvas->saveLayer(&r, nullptr);
-                draw_mode(canvas, mode, twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
+                draw_mode(canvas, SkXfermode::Make(gModes[i].fMode),
+                          twice ? 0x88 : 0xFF, r.fLeft, r.fTop);
                 canvas->restore();
 
                 r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
                 p.setStyle(SkPaint::kStroke_Style);
                 p.setShader(nullptr);
                 canvas->drawRect(r, p);
 
                 canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel),
                                  x + w/2, y - labelP.getTextSize()/2, labelP);
                 x += w + SkIntToScalar(10);
                 if ((i % W) == W - 1) {
                     x = x0;
                     y += h + SkIntToScalar(30);
                 }
             }
             x0 += SkIntToScalar(400);
         }
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new XfermodesBlurView; }
 static SkViewRegister reg(MyFactory);