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      1 /*
      2  * Copyright 2012 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 "SkPath.h"
     11 #include "SkParsePath.h"
     12 #include "SkDashPathEffect.h"
     13 
     14 /*
     15  *  Inspired by http://code.google.com/p/chromium/issues/detail?id=112145
     16  */
     17 
     18 class DashCubicsGM : public skiagm::GM {
     19 public:
     20     DashCubicsGM() {}
     21 
     22 protected:
     23 
     24     virtual SkString onShortName() {
     25         return SkString("dashcubics");
     26     }
     27 
     28     virtual SkISize onISize() {
     29         return SkISize::Make(860, 700);
     30     }
     31 
     32     void flower(SkCanvas* canvas, const SkPath& path, SkScalar intervals[2], SkPaint::Join join) {
     33         SkPathEffect* pe = SkDashPathEffect::Create(intervals, 2, 0);
     34 
     35         SkPaint paint;
     36         paint.setAntiAlias(true);
     37         paint.setStyle(SkPaint::kStroke_Style);
     38         paint.setStrokeJoin(join);
     39         paint.setStrokeWidth(42);
     40         canvas->drawPath(path, paint);
     41 
     42         paint.setColor(SK_ColorRED);
     43         paint.setStrokeWidth(21);
     44         paint.setPathEffect(pe)->unref();
     45         canvas->drawPath(path, paint);
     46 
     47         paint.setColor(SK_ColorGREEN);
     48         paint.setPathEffect(NULL);
     49         paint.setStrokeWidth(0);
     50         canvas->drawPath(path, paint);
     51     }
     52 
     53     virtual void onDraw(SkCanvas* canvas) {
     54         SkPath path;
     55         const char* d = "M 337,98 C 250,141 250,212 250,212 C 250,212 250,212 250,212"
     56         "C 250,212 250,212 250,212 C 250,212 250,141 163,98 C 156,195 217,231 217,231"
     57         "C 217,231 217,231 217,231 C 217,231 217,231 217,231 C 217,231 156,195 75,250"
     58         "C 156,305 217,269 217,269 C 217,269 217,269 217,269 C 217,269 217,269 217,269"
     59         "C 217,269 156,305 163,402 C 250,359 250,288 250,288 C 250,288 250,288 250,288"
     60         "C 250,288 250,288 250,288 C 250,288 250,359 338,402 C 345,305 283,269 283,269"
     61         "C 283,269 283,269 283,269 C 283,269 283,269 283,269 C 283,269 345,305 425,250"
     62         "C 344,195 283,231 283,231 C 283,231 283,231 283,231 C 283,231 283,231 283,231"
     63         "C 283,231 344,195 338,98";
     64 
     65         SkParsePath::FromSVGString(d, &path);
     66             canvas->translate(-35.f, -55.f);
     67         for (int x = 0; x < 2; ++x) {
     68             for (int y = 0; y < 2; ++y) {
     69                 canvas->save();
     70                 canvas->translate(x * 430.f, y * 355.f);
     71                 SkScalar intervals[] = { 5 + (x ? 0 : 0.0001f + 0.0001f), 10 };
     72                 flower(canvas, path, intervals, y ? SkPaint::kDefault_Join : SkPaint::kRound_Join);
     73                 canvas->restore();
     74             }
     75         }
     76     }
     77 
     78 private:
     79     typedef GM INHERITED;
     80 };
     81 
     82 //////////////////////////////////////////////////////////////////////////////
     83 
     84 static skiagm::GM* MyFactory(void*) { return new DashCubicsGM; }
     85 static skiagm::GMRegistry reg(MyFactory);
     86