gm/filltypes.cpp

   1 /*
   2  * Copyright 2011 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 "sk_tool_utils.h"
  10 #include "SkPath.h"
  11
  12 namespace skiagm {
  13
  14 class FillTypeGM : public GM {
  15     SkPath fPath;
  16 public:
  17     FillTypeGM() {
  18         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
  19     }
  20
  21     void makePath() {
  22         if (fPath.isEmpty()) {
  23             const SkScalar radius = SkIntToScalar(45);
  24             fPath.addCircle(SkIntToScalar(50), SkIntToScalar(50), radius);
  25             fPath.addCircle(SkIntToScalar(100), SkIntToScalar(100), radius);
  26         }
  27     }
  28
  29 protected:
  30
  31     SkString onShortName() override {
  32         return SkString("filltypes");
  33     }
  34
  35     SkISize onISize() override {
  36         return SkISize::Make(835, 840);
  37     }
  38
  39     void showPath(SkCanvas* canvas, int x, int y, SkPath::FillType ft,
  40                   SkScalar scale, const SkPaint& paint) {
  41         const SkRect r = { 0, 0, SkIntToScalar(150), SkIntToScalar(150) };
  42
  43         canvas->save();
  44         canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
  45         canvas->clipRect(r);
  46         canvas->drawColor(SK_ColorWHITE);
  47         fPath.setFillType(ft);
  48         canvas->translate(r.centerX(), r.centerY());
  49         canvas->scale(scale, scale);
  50         canvas->translate(-r.centerX(), -r.centerY());
  51         canvas->drawPath(fPath, paint);
  52         canvas->restore();
  53     }
  54
  55     void showFour(SkCanvas* canvas, SkScalar scale, const SkPaint& paint) {
  56         showPath(canvas,   0,   0, SkPath::kWinding_FillType,
  57                  scale, paint);
  58         showPath(canvas, 200,   0, SkPath::kEvenOdd_FillType,
  59                  scale, paint);
  60         showPath(canvas,  00, 200, SkPath::kInverseWinding_FillType,
  61                  scale, paint);
  62         showPath(canvas, 200, 200, SkPath::kInverseEvenOdd_FillType,
  63                  scale, paint);
  64     }
  65
  66     void onDraw(SkCanvas* canvas) override {
  67         this->makePath();
  68
  69         canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
  70
  71         SkPaint paint;
  72         const SkScalar scale = SkIntToScalar(5)/4;
  73
  74         paint.setAntiAlias(false);
  75
  76         showFour(canvas, SK_Scalar1, paint);
  77         canvas->translate(SkIntToScalar(450), 0);
  78         showFour(canvas, scale, paint);
  79
  80         paint.setAntiAlias(true);
  81
  82         canvas->translate(SkIntToScalar(-450), SkIntToScalar(450));
  83         showFour(canvas, SK_Scalar1, paint);
  84         canvas->translate(SkIntToScalar(450), 0);
  85         showFour(canvas, scale, paint);
  86     }
  87
  88 private:
  89     typedef GM INHERITED;
  90 };
  91
  92 //////////////////////////////////////////////////////////////////////////////
  93
  94 static GM* MyFactory(void*) { return new FillTypeGM; }
  95 static GMRegistry reg(MyFactory);
  96
  97 }