skia2/samplecode/SampleEmboss.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 "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkTime.h"
#include "include/core/SkTypeface.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkRandom.h"
#include "samplecode/Sample.h"
#include "src/core/SkBlurMask.h"
#include "src/effects/SkEmbossMaskFilter.h"
#include "src/utils/SkUTF.h"

class EmbossView : public Sample {
    SkEmbossMaskFilter::Light   fLight;
public:
    EmbossView() {
        fLight.fDirection[0] = SK_Scalar1;
        fLight.fDirection[1] = SK_Scalar1;
        fLight.fDirection[2] = SK_Scalar1;
        fLight.fAmbient = 128;
        fLight.fSpecular = 16*2;
    }

protected:
    SkString name() override { return SkString("Emboss"); }

    void onDrawContent(SkCanvas* canvas) override {
        SkPaint paint;

        paint.setAntiAlias(true);
        paint.setStyle(SkPaint::kStroke_Style);
        paint.setStrokeWidth(SkIntToScalar(10));
        paint.setMaskFilter(SkEmbossMaskFilter::Make(SkBlurMask::ConvertRadiusToSigma(4), fLight));
        paint.setShader(SkShaders::Color(SK_ColorBLUE));
        paint.setDither(true);

        canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50),
                           SkIntToScalar(30), paint);
    }

private:

    using INHERITED = Sample;
};

//////////////////////////////////////////////////////////////////////////////

DEF_SAMPLE( return new EmbossView(); )