gm/dashcubics.cpp

   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 static void flower(SkCanvas* canvas, const SkPath& path, SkScalar intervals[2],
  18                    SkPaint::Join join) {
  19     SkPaint paint;
  20     paint.setAntiAlias(true);
  21     paint.setStyle(SkPaint::kStroke_Style);
  22     paint.setStrokeJoin(join);
  23     paint.setStrokeWidth(42);
  24     canvas->drawPath(path, paint);
  25
  26     paint.setColor(SK_ColorRED);
  27     paint.setStrokeWidth(21);
  28     paint.setPathEffect(SkDashPathEffect::Make(intervals, 2, 0));
  29     canvas->drawPath(path, paint);
  30
  31     paint.setColor(SK_ColorGREEN);
  32     paint.setPathEffect(nullptr);
  33     paint.setStrokeWidth(0);
  34     canvas->drawPath(path, paint);
  35 }
  36
  37 DEF_SIMPLE_GM(dashcubics, canvas, 865, 750) {
  38         SkPath path;
  39         const char* d = "M 337,98 C 250,141 250,212 250,212 C 250,212 250,212 250,212"
  40         "C 250,212 250,212 250,212 C 250,212 250,141 163,98 C 156,195 217,231 217,231"
  41         "C 217,231 217,231 217,231 C 217,231 217,231 217,231 C 217,231 156,195 75,250"
  42         "C 156,305 217,269 217,269 C 217,269 217,269 217,269 C 217,269 217,269 217,269"
  43         "C 217,269 156,305 163,402 C 250,359 250,288 250,288 C 250,288 250,288 250,288"
  44         "C 250,288 250,288 250,288 C 250,288 250,359 338,402 C 345,305 283,269 283,269"
  45         "C 283,269 283,269 283,269 C 283,269 283,269 283,269 C 283,269 345,305 425,250"
  46         "C 344,195 283,231 283,231 C 283,231 283,231 283,231 C 283,231 283,231 283,231"
  47         "C 283,231 344,195 338,98";
  48
  49         SkParsePath::FromSVGString(d, &path);
  50             canvas->translate(-35.f, -55.f);
  51         for (int x = 0; x < 2; ++x) {
  52             for (int y = 0; y < 2; ++y) {
  53                 canvas->save();
  54                 canvas->translate(x * 430.f, y * 355.f);
  55                 SkScalar intervals[] = { 5 + (x ? 0 : 0.0001f + 0.0001f), 10 };
  56                 flower(canvas, path, intervals, y ? SkPaint::kDefault_Join : SkPaint::kRound_Join);
  57                 canvas->restore();
  58             }
  59         }
  60 }