| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkPath.h" |
| #include "samplecode/Sample.h" |
| |
| // Reproduces https://code.google.com/p/chromium/issues/detail?id=279014 |
| |
| // Renders a string art shape. |
| // The particular shape rendered can be controlled by clicking horizontally, thereby |
| // generating an angle from 0 to 1. |
| |
| class StringArtView : public Sample { |
| public: |
| StringArtView() : fAngle(0.305f) {} |
| |
| protected: |
| SkString name() override { return SkString("StringArt"); } |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| SkScalar angle = fAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI); |
| |
| SkPoint center = SkPoint::Make(SkScalarHalf(this->width()), SkScalarHalf(this->height())); |
| SkScalar length = 5; |
| SkScalar step = angle; |
| |
| SkPath path; |
| path.moveTo(center); |
| |
| while (length < (SkScalarHalf(SkMinScalar(this->width(), this->height())) - 10.f)) |
| { |
| SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX, |
| length*SkScalarSin(step) + center.fY); |
| path.lineTo(rp); |
| length += angle / SkScalarHalf(SK_ScalarPI); |
| step += angle; |
| } |
| path.close(); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setColor(0xFF007700); |
| |
| canvas->drawPath(path, paint); |
| } |
| |
| Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, ModifierKey) override { |
| fAngle = x/width(); |
| return nullptr; |
| } |
| private: |
| |
| SkScalar fAngle; |
| typedef Sample INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SAMPLE( return new StringArtView(); ) |