diff options
author | jvanverth@google.com <jvanverth@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-09-19 15:32:22 +0000 |
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committer | jvanverth@google.com <jvanverth@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-09-19 15:32:22 +0000 |
commit | 4ea2878f076cd41da803e6fcdcfb884b18a5b00c (patch) | |
tree | 9cf183d19fa5ba3f0a5fd3883540be82fa0a628a /samplecode/SampleStringArt.cpp | |
parent | e2fd2d265126ce778b07177fb6820a3ef08a6156 (diff) |
Add string art GM and sample.
BUG=279014
R=robertphillips@google.com
Review URL: https://codereview.chromium.org/23609037
git-svn-id: http://skia.googlecode.com/svn/trunk@11383 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'samplecode/SampleStringArt.cpp')
-rw-r--r-- | samplecode/SampleStringArt.cpp | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/samplecode/SampleStringArt.cpp b/samplecode/SampleStringArt.cpp new file mode 100644 index 0000000000..c6547ed4fa --- /dev/null +++ b/samplecode/SampleStringArt.cpp @@ -0,0 +1,72 @@ +/* + * 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 "SampleCode.h" +#include "SkCanvas.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 SampleView { +public: + StringArtView() : fAngle(0.305f) {} + +protected: + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) SK_OVERRIDE { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, "StringArt"); + return true; + } + return this->INHERITED::onQuery(evt); + } + + virtual void onDrawContent(SkCanvas* canvas) SK_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(SkMin32(this->width(), this->height())) - 10.f)) + { + SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX, + length*SkScalarSin(step) + center.fY); + path.lineTo(rp); + length += SkScalarDiv(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); + } + + virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE { + fAngle = x/width(); + this->inval(NULL); + return NULL; + } +private: + + SkScalar fAngle; + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new StringArtView; } +static SkViewRegister reg(MyFactory); |