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 "SkGradientShader.h"
  13 #include "SkPath.h"
  14 #include "SkRegion.h"
  15 #include "SkShader.h"
  16 #include "SkUtils.h"
  17
  18 class FillTypeView : public SampleView {
  19     SkPath fPath;
  20 public:
  21     FillTypeView() {
  22         const SkScalar radius = SkIntToScalar(45);
  23         fPath.addCircle(SkIntToScalar(50), SkIntToScalar(50), radius);
  24         fPath.addCircle(SkIntToScalar(100), SkIntToScalar(100), radius);
  25
  26         this->setBGColor(0xFFDDDDDD);
  27     }
  28
  29 protected:
  30     // overrides from SkEventSink
  31     virtual bool onQuery(SkEvent* evt) {
  32         if (SampleCode::TitleQ(*evt)) {
  33             SampleCode::TitleR(evt, "FillType");
  34             return true;
  35         }
  36         return this->INHERITED::onQuery(evt);
  37     }
  38
  39     void showPath(SkCanvas* canvas, int x, int y, SkPath::FillType ft,
  40                   SkScalar scale, const SkPaint& paint) {
  41
  42         const SkRect r = { 0, 0, SkIntToScalar(150), SkIntToScalar(150) };
  43
  44         canvas->save();
  45         canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
  46         canvas->clipRect(r);
  47         canvas->drawColor(SK_ColorWHITE);
  48         fPath.setFillType(ft);
  49         canvas->translate(r.centerX(), r.centerY());
  50         canvas->scale(scale, scale);
  51         canvas->translate(-r.centerX(), -r.centerY());
  52         canvas->drawPath(fPath, paint);
  53         canvas->restore();
  54     }
  55
  56     void showFour(SkCanvas* canvas, SkScalar scale, const SkPaint& paint) {
  57         showPath(canvas,   0,   0, SkPath::kWinding_FillType,
  58                  scale, paint);
  59         showPath(canvas, 200,   0, SkPath::kEvenOdd_FillType,
  60                  scale, paint);
  61         showPath(canvas,  00, 200, SkPath::kInverseWinding_FillType,
  62                  scale, paint);
  63         showPath(canvas, 200, 200, SkPath::kInverseEvenOdd_FillType,
  64                  scale, paint);
  65     }
  66
  67     virtual void onDrawContent(SkCanvas* canvas) {
  68         canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
  69
  70         SkPaint paint;
  71         const SkScalar scale = SkIntToScalar(5)/4;
  72
  73         paint.setAntiAlias(false);
  74         paint.setColor(0x8000FF00);
  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 SampleView INHERITED;
  90 };
  91
  92 //////////////////////////////////////////////////////////////////////////////
  93
  94 static SkView* MyFactory() { return new FillTypeView; }
  95 static SkViewRegister reg(MyFactory);