3a85ed12bf
Change-Id: Idb5dfe57a7f6e3d6078ab1e68d542b084114cfbe Reviewed-on: https://skia-review.googlesource.com/c/skia/+/225735 Commit-Queue: Hal Canary <halcanary@google.com> Reviewed-by: Ben Wagner <bungeman@google.com>
66 lines
1.8 KiB
C++
66 lines
1.8 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 "include/core/SkCanvas.h"
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#include "include/core/SkPath.h"
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#include "samplecode/Sample.h"
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// Reproduces https://code.google.com/p/chromium/issues/detail?id=279014
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// Renders a string art shape.
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// The particular shape rendered can be controlled by clicking horizontally, thereby
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// generating an angle from 0 to 1.
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class StringArtView : public Sample {
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public:
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StringArtView() : fAngle(0.305f) {}
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protected:
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SkString name() override { return SkString("StringArt"); }
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void onDrawContent(SkCanvas* canvas) override {
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SkScalar angle = fAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
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SkPoint center = SkPoint::Make(SkScalarHalf(this->width()), SkScalarHalf(this->height()));
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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(SkMinScalar(this->width(), this->height())) - 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 += 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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Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, ModifierKey) override {
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fAngle = x/width();
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return nullptr;
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}
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private:
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SkScalar fAngle;
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typedef Sample INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new StringArtView(); )
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