gm/drawregionmodes.cpp

   1 /*
   2  * Copyright 2016 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 #include "SkBlurMaskFilter.h"
  10 #include "SkCanvas.h"
  11 #include "SkDashPathEffect.h"
  12 #include "SkGradientShader.h"
  13 #include "SkImageFilter.h"
  14 #include "SkRegion.h"
  15
  16 class DrawRegionModesGM : public skiagm::GM {
  17 public:
  18     DrawRegionModesGM() {}
  19
  20 protected:
  21     SkString onShortName() override {
  22         return SkString("drawregionmodes");
  23     }
  24
  25     SkISize onISize() override {
  26         return SkISize::Make(375, 500);
  27     }
  28
  29     void onOnceBeforeDraw() override {
  30         fRegion.op( 50,  50, 100, 100, SkRegion::kUnion_Op);
  31         fRegion.op( 50, 100, 150, 150, SkRegion::kUnion_Op);
  32     }
  33
  34     void onDraw(SkCanvas* canvas) override {
  35         canvas->clear(SK_ColorGREEN);
  36
  37         SkPaint paint;
  38         paint.setStyle(SkPaint::kFill_Style);
  39         paint.setColor(0xFFFF0000);
  40         paint.setAntiAlias(true);
  41
  42         canvas->translate(-50.0f, 75.0f);
  43         canvas->rotate(-45.0f);
  44         canvas->drawRegion(fRegion, paint);
  45
  46         canvas->translate(125.0f, 125.0f);
  47         paint.setImageFilter(SkImageFilter::MakeBlur(5.0f, 5.0f, nullptr, nullptr));
  48         canvas->drawRegion(fRegion, paint);
  49
  50         canvas->translate(-125.0f, 125.0f);
  51         paint.setImageFilter(nullptr);
  52         SkRect occluder = SkRect::MakeEmpty();
  53         paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, 5.0f, occluder, 0));
  54         canvas->drawRegion(fRegion, paint);
  55
  56         canvas->translate(-125.0f, -125.0f);
  57         paint.setMaskFilter(nullptr);
  58         paint.setStyle(SkPaint::kStroke_Style);
  59         float intervals[] = { 5.0f, 5.0f };
  60         paint.setPathEffect(SkDashPathEffect::Make(intervals, 2, 2.5f));
  61         canvas->drawRegion(fRegion, paint);
  62
  63         canvas->setMatrix(SkMatrix::I());
  64         canvas->translate(100, 325);
  65         paint.setPathEffect(nullptr);
  66         paint.setStyle(SkPaint::kFill_Style);
  67         SkPoint points[] = { SkPoint::Make(50.0f, 50.0f), SkPoint::Make(150.0f, 150.0f) };
  68         SkColor colors[] = { SK_ColorBLUE, SK_ColorYELLOW };
  69         paint.setShader(SkGradientShader::MakeLinear(points, colors, nullptr, 2,
  70                                                      SkShader::kClamp_TileMode));
  71         canvas->drawRegion(fRegion, paint);
  72     }
  73
  74     SkRegion fRegion;
  75
  76 private:
  77     typedef skiagm::GM INHERITED;
  78 };
  79 DEF_GM( return new DrawRegionModesGM; )