Reland "remove unused SkAvoidXfermode"

samplecode/SampleAvoid.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 "SkCanvas.h"
-#include "SkGradientShader.h"
-#include "SkAvoidXfermode.h"
-
-///////////////////////////////////////////////////////////////////////////////
-
-class AvoidView : public SampleView {
-    SkShader* fShader;
-
-    enum {
-        W = 480,
-        H = 320
-    };
-public:
-    AvoidView() {
-        SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW, SK_ColorGREEN, SK_ColorCYAN, SK_ColorBLUE };
-
-#if 0
-        SkPoint pts[] = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
-        fShader = SkGradientShader::CreateLinear(pts, colors, NULL,
-                                                 SK_ARRAY_COUNT(colors),
-                                                 SkShader::kMirror_TileMode);
-#else
-        SkPoint pts[] = { { SkIntToScalar(W)/2, SkIntToScalar(H)/2 } };
-        fShader = SkGradientShader::CreateRadial(pts[0], SkIntToScalar(H)/5,
-                                                 colors, NULL,
-                                                 SK_ARRAY_COUNT(colors),
-                                                 SkShader::kMirror_TileMode);
-#endif
-    }
-
-    virtual ~AvoidView() {
-        fShader->unref();
-    }
-
-protected:
-    virtual bool onQuery(SkEvent* evt) {
-        if (SampleCode::TitleQ(*evt)) {
-            SampleCode::TitleR(evt, "AvoidXfermode");
-            return true;
-        }
-        return this->INHERITED::onQuery(evt);
-    }
-
-    virtual void onDrawContent(SkCanvas* canvas) {
-        SkPaint paint;
-        SkRect r = { 0, 0, SkIntToScalar(W), SkIntToScalar(H) };
-
-        canvas->translate(r.width() / 6, r.height() / 6);
-
-        paint.setShader(fShader);
-        canvas->drawRect(r, paint);
-
-        static const struct {
-            int                     fTolerance;
-            SkAvoidXfermode::Mode   fMode;
-            float                   fDX, fDY;
-        } gData[] = {
-            { 16,       SkAvoidXfermode::kAvoidColor_Mode, 0, 0 },
-            { 255-16,   SkAvoidXfermode::kAvoidColor_Mode, 1, 0 },
-            { 16,       SkAvoidXfermode::kTargetColor_Mode, 0, 1 },
-            { 255-16,   SkAvoidXfermode::kTargetColor_Mode, 1, 1 },
-        };
-
-        paint.setShader(NULL);
-        paint.setColor(SK_ColorMAGENTA);
-
-        SkPaint frameP;
-        frameP.setStyle(SkPaint::kStroke_Style);
-
-        for (size_t i = 0; i < SK_ARRAY_COUNT(gData); i++) {
-            SkAutoTUnref<SkAvoidXfermode> mode(SkAvoidXfermode::Create(
-                SK_ColorGREEN, gData[i].fTolerance, gData[i].fMode));
-            paint.setXfermode(mode);
-            int div = 3;
-            SkRect rr = { 0, 0, r.width()/div, r.height()/div };
-            rr.offset(r.width()/4 - rr.width()/2, r.height()/4 - rr.height()/2);
-            rr.offset(r.width() * gData[i].fDX/2, r.height() * gData[i].fDY/2);
-            canvas->drawRect(rr, paint);
-            paint.setXfermode(NULL);
-
-            canvas->drawRect(rr, frameP);
-        }
-    }
-
-private:
-    typedef SampleView INHERITED;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-
-static SkView* MyFactory() {
-    return new AvoidView;
-}
-
-static SkViewRegister reg(MyFactory);