91 lines
2.2 KiB
C++
91 lines
2.2 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/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/utils/SkRandom.h"
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namespace skiagm {
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// This GM draws a lot of arcs in a 'Z' shape. It particularly exercises
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// the 'drawArc' code near a singularly of its processing (i.e., near the
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// edge of one of its underlying quads).
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class ArcOfZorroGM : public GM {
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public:
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ArcOfZorroGM() {
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this->setBGColor(0xFFCCCCCC);
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}
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protected:
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SkString onShortName() override {
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return SkString("arcofzorro");
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}
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SkISize onISize() override {
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return SkISize::Make(1000, 1000);
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}
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void onDraw(SkCanvas* canvas) override {
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SkRandom rand;
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SkRect rect = SkRect::MakeXYWH(10, 10, 200, 200);
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SkPaint p;
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(35);
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int xOffset = 0, yOffset = 0;
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int direction = 0;
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for (float arc = 134.0f; arc < 136.0f; arc += 0.01f) {
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SkColor color = rand.nextU();
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color |= 0xff000000;
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p.setColor(color);
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canvas->save();
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canvas->translate(SkIntToScalar(xOffset), SkIntToScalar(yOffset));
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canvas->drawArc(rect, 0, arc, false, p);
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canvas->restore();
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switch (direction) {
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case 0:
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xOffset += 10;
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if (xOffset >= 700) {
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direction = 1;
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}
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break;
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case 1:
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xOffset -= 10;
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yOffset += 10;
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if (xOffset < 50) {
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direction = 2;
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}
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break;
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case 2:
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xOffset += 10;
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break;
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}
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}
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}
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private:
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using INHERITED = GM;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new ArcOfZorroGM;)
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} // namespace skiagm
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