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74 lines
2.2 KiB
74 lines
2.2 KiB
4 months ago
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/*
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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 "Sample.h"
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#include "SkCanvas.h"
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#include "SkPaint.h"
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#include "SkRandom.h"
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#include "SkShader.h"
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/**
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* Animated sample used to develop a predecessor of GrDrawOp combining.
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*/
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class ManyRectsView : public Sample {
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private:
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enum {
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N = 1000,
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};
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public:
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ManyRectsView() {}
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protected:
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bool onQuery(Sample::Event* evt) override {
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if (Sample::TitleQ(*evt)) {
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Sample::TitleR(evt, "ManyRects");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void onDrawContent(SkCanvas* canvas) override {
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SkISize dsize = canvas->getBaseLayerSize();
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canvas->clear(0xFFF0E0F0);
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for (int i = 0; i < N; ++i) {
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SkRect rect = SkRect::MakeWH(SkIntToScalar(fRandom.nextRangeU(10, 100)),
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SkIntToScalar(fRandom.nextRangeU(10, 100)));
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int x = fRandom.nextRangeU(0, dsize.fWidth);
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int y = fRandom.nextRangeU(0, dsize.fHeight);
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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// Uncomment to test rotated rect draw combining.
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if (false) {
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SkMatrix rotate;
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rotate.setRotate(fRandom.nextUScalar1() * 360,
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SkIntToScalar(x) + SkScalarHalf(rect.fRight),
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SkIntToScalar(y) + SkScalarHalf(rect.fBottom));
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canvas->concat(rotate);
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}
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SkRect clipRect = rect;
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// This clip will always contain the entire rect. It's here to give the GPU op combining
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// code a little more challenge.
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clipRect.outset(10, 10);
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canvas->clipRect(clipRect);
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SkPaint paint;
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paint.setColor(fRandom.nextU());
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canvas->drawRect(rect, paint);
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canvas->restore();
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}
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}
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private:
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SkRandom fRandom;
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typedef Sample INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new ManyRectsView(); )
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