417446a1ce
R=robertphillips@google.com Review URL: https://codereview.chromium.org/24258003 git-svn-id: http://skia.googlecode.com/svn/trunk@11384 2bbb7eff-a529-9590-31e7-b0007b416f81
67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkPath.h"
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// Reproduces https://code.google.com/p/chromium/issues/detail?id=279014
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static const SkScalar kWidth = SkIntToScalar(640);
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static const SkScalar kHeight = SkIntToScalar(480);
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static const SkScalar kAngle = 0.305f;
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// Renders a string art shape.
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// The particular shape rendered can be controlled by adjusting kAngle, from 0 to 1
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class StringArtGM : public skiagm::GM {
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public:
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StringArtGM() {}
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protected:
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virtual SkString onShortName() {
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return SkString("stringart");
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}
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virtual SkISize onISize() {
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return SkISize::Make(kWidth, kHeight);
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}
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virtual void onDraw(SkCanvas* canvas) {
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SkScalar angle = kAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
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SkScalar size = SkMinScalar(kWidth, kHeight);
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SkPoint center = SkPoint::Make(SkScalarHalf(kWidth), SkScalarHalf(kHeight));
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SkScalar length = 5;
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SkScalar step = angle;
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SkPath path;
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path.moveTo(center);
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while (length < (SkScalarHalf(size) - 10.f))
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{
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SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
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length*SkScalarSin(step) + center.fY);
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path.lineTo(rp);
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length += SkScalarDiv(angle, SkScalarHalf(SK_ScalarPI));
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step += angle;
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}
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path.close();
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setColor(0xFF007700);
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canvas->drawPath(path, paint);
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}
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private:
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typedef GM INHERITED;
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};
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DEF_GM( return new StringArtGM; )
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