samplecode/SampleFillType.cpp

   1
   2 /*
   3  * Copyright 2011 Google Inc.
   4  *
   5  * Use of this source code is governed by a BSD-style license that can be
   6  * found in the LICENSE file.
   7  */
   8 #include "SampleCode.h"
   9 #include "SkView.h"
  10 #include "SkCanvas.h"
  11 #include "SkCornerPathEffect.h"
  12 #include "SkCullPoints.h"
  13 #include "SkGradientShader.h"
  14 #include "SkPath.h"
  15 #include "SkRegion.h"
  16 #include "SkShader.h"
  17 #include "SkUtils.h"
  18
  19 class FillTypeView : public SampleView {
  20     SkPath fPath;
  21 public:
  22     FillTypeView() {
  23         const SkScalar radius = SkIntToScalar(45);
  24         fPath.addCircle(SkIntToScalar(50), SkIntToScalar(50), radius);
  25         fPath.addCircle(SkIntToScalar(100), SkIntToScalar(100), radius);
  26
  27         this->setBGColor(0xFFDDDDDD);
  28     }
  29
  30 protected:
  31     // overrides from SkEventSink
  32     virtual bool onQuery(SkEvent* evt) {
  33         if (SampleCode::TitleQ(*evt)) {
  34             SampleCode::TitleR(evt, "FillType");
  35             return true;
  36         }
  37         return this->INHERITED::onQuery(evt);
  38     }
  39
  40     void showPath(SkCanvas* canvas, int x, int y, SkPath::FillType ft,
  41                   SkScalar scale, const SkPaint& paint) {
  42
  43         const SkRect r = { 0, 0, SkIntToScalar(150), SkIntToScalar(150) };
  44
  45         canvas->save();
  46         canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
  47         canvas->clipRect(r);
  48         canvas->drawColor(SK_ColorWHITE);
  49         fPath.setFillType(ft);
  50         canvas->translate(r.centerX(), r.centerY());
  51         canvas->scale(scale, scale);
  52         canvas->translate(-r.centerX(), -r.centerY());
  53         canvas->drawPath(fPath, paint);
  54         canvas->restore();
  55     }
  56
  57     void showFour(SkCanvas* canvas, SkScalar scale, const SkPaint& paint) {
  58         showPath(canvas,   0,   0, SkPath::kWinding_FillType,
  59                  scale, paint);
  60         showPath(canvas, 200,   0, SkPath::kEvenOdd_FillType,
  61                  scale, paint);
  62         showPath(canvas,  00, 200, SkPath::kInverseWinding_FillType,
  63                  scale, paint);
  64         showPath(canvas, 200, 200, SkPath::kInverseEvenOdd_FillType,
  65                  scale, paint);
  66     }
  67
  68     virtual void onDrawContent(SkCanvas* canvas) {
  69         canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
  70
  71         SkPaint paint;
  72         const SkScalar scale = SkIntToScalar(5)/4;
  73
  74         paint.setAntiAlias(false);
  75         paint.setColor(0x8000FF00);
  76
  77         showFour(canvas, SK_Scalar1, paint);
  78         canvas->translate(SkIntToScalar(450), 0);
  79         showFour(canvas, scale, paint);
  80
  81         paint.setAntiAlias(true);
  82
  83         canvas->translate(SkIntToScalar(-450), SkIntToScalar(450));
  84         showFour(canvas, SK_Scalar1, paint);
  85         canvas->translate(SkIntToScalar(450), 0);
  86         showFour(canvas, scale, paint);
  87     }
  88
  89 private:
  90     typedef SampleView INHERITED;
  91 };
  92
  93 //////////////////////////////////////////////////////////////////////////////
  94
  95 static SkView* MyFactory() { return new FillTypeView; }
  96 static SkViewRegister reg(MyFactory);
  97