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      1 /*
      2  * Copyright 2014 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "gm.h"
      9 
     10 #include "SkBlurMask.h"
     11 #include "SkCanvas.h"
     12 #include "SkColorFilter.h"
     13 #include "SkEmbossMaskFilter.h"
     14 #include "SkFont.h"
     15 
     16 static SkBitmap make_bm() {
     17     SkBitmap bm;
     18     bm.allocN32Pixels(100, 100);
     19 
     20     SkCanvas canvas(bm);
     21     canvas.clear(0);
     22     SkPaint paint;
     23     paint.setAntiAlias(true);
     24     canvas.drawCircle(50, 50, 50, paint);
     25     return bm;
     26 }
     27 
     28 class EmbossGM : public skiagm::GM {
     29 public:
     30     EmbossGM() {
     31     }
     32 
     33 protected:
     34     SkString onShortName() override {
     35         return SkString("emboss");
     36     }
     37 
     38     SkISize onISize() override {
     39         return SkISize::Make(600, 120);
     40     }
     41 
     42     void onDraw(SkCanvas* canvas) override {
     43         SkPaint paint;
     44         SkBitmap bm = make_bm();
     45         canvas->drawBitmap(bm, 10, 10, &paint);
     46         canvas->translate(bm.width() + SkIntToScalar(10), 0);
     47 
     48         paint.setMaskFilter(SkEmbossMaskFilter::Make(
     49             SkBlurMask::ConvertRadiusToSigma(3),
     50             { { SK_Scalar1, SK_Scalar1, SK_Scalar1 }, 0, 128, 16*2 }));
     51         canvas->drawBitmap(bm, 10, 10, &paint);
     52         canvas->translate(bm.width() + SkIntToScalar(10), 0);
     53 
     54         // this combination of emboss+colorfilter used to crash -- so we exercise it to
     55         // confirm that we have a fix.
     56         paint.setColorFilter(SkColorFilter::MakeModeFilter(0xFFFF0000, SkBlendMode::kSrcATop));
     57         canvas->drawBitmap(bm, 10, 10, &paint);
     58         canvas->translate(bm.width() + SkIntToScalar(10), 0);
     59 
     60         paint.setAntiAlias(true);
     61         paint.setStyle(SkPaint::kStroke_Style);
     62         paint.setStrokeWidth(SkIntToScalar(10));
     63         paint.setMaskFilter(SkEmbossMaskFilter::Make(
     64             SkBlurMask::ConvertRadiusToSigma(4),
     65             { { SK_Scalar1, SK_Scalar1, SK_Scalar1 }, 0, 128, 16*2 }));
     66         paint.setColorFilter(nullptr);
     67         paint.setShader(SkShader::MakeColorShader(SK_ColorBLUE));
     68         paint.setDither(true);
     69         canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50),
     70                            SkIntToScalar(30), paint);
     71         canvas->translate(SkIntToScalar(100), 0);
     72 
     73         paint.setStyle(SkPaint::kFill_Style);
     74         canvas->drawString("Hello", 0, 50, SkFont(nullptr, 50), paint);
     75     }
     76 
     77 private:
     78     typedef skiagm::GM INHERITED;
     79 };
     80 
     81 DEF_GM(return new EmbossGM;)
     82