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      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 "SkCanvas.h"
     10 #include "SkCullPoints.h"
     11 #include "SkRandom.h"
     12 
     13 static void test_hittest(SkCanvas* canvas, const SkPath& path) {
     14     SkPaint paint;
     15     SkRect r = path.getBounds();
     16 
     17     paint.setColor(SK_ColorRED);
     18     canvas->drawPath(path, paint);
     19 
     20     const SkScalar MARGIN = SkIntToScalar(4);
     21 
     22     paint.setColor(0x800000FF);
     23     for (SkScalar y = r.fTop + SK_ScalarHalf - MARGIN; y < r.fBottom + MARGIN; y += SK_Scalar1) {
     24         for (SkScalar x = r.fLeft + SK_ScalarHalf - MARGIN; x < r.fRight + MARGIN; x += SK_Scalar1) {
     25             if (path.contains(x, y)) {
     26                 canvas->drawPoint(x, y, paint);
     27             }
     28         }
     29     }
     30 }
     31 
     32 class HitTestPathGM : public skiagm::GM {
     33 public:
     34     HitTestPathGM () {}
     35 
     36 protected:
     37     virtual SkString onShortName() {
     38         return SkString("hittestpath");
     39     }
     40 
     41     virtual SkISize onISize() { return SkISize::Make(700, 460); }
     42 
     43     virtual void onDraw(SkCanvas* canvas) {
     44         SkPath path;
     45         SkRandom rand;
     46 
     47         int scale = 300;
     48         for (int i = 0; i < 4; ++i) {
     49             path.lineTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
     50             path.quadTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
     51                         rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
     52             path.cubicTo(rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
     53                          rand.nextUScalar1() * scale, rand.nextUScalar1() * scale,
     54                          rand.nextUScalar1() * scale, rand.nextUScalar1() * scale);
     55         }
     56 
     57         path.setFillType(SkPath::kEvenOdd_FillType);
     58         path.offset(SkIntToScalar(20), SkIntToScalar(20));
     59 
     60         test_hittest(canvas, path);
     61 
     62         canvas->translate(SkIntToScalar(scale), 0);
     63         path.setFillType(SkPath::kWinding_FillType);
     64 
     65         test_hittest(canvas, path);
     66     }
     67 
     68 private:
     69     typedef GM INHERITED;
     70 };
     71 
     72 //////////////////////////////////////////////////////////////////////////////
     73 
     74 static skiagm::GM* MyFactory(void*) { return new HitTestPathGM; }
     75 static skiagm::GMRegistry reg(MyFactory);
     76