96fcdcc219
DOCS_PREVIEW= https://skia.org/?cl=1316233002 Review URL: https://codereview.chromium.org/1316233002
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
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/*
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* Copyright 2012 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 "SkPicture.h"
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#include "SkPictureRecorder.h"
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namespace skiagm {
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class DistantClipGM : public GM {
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public:
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DistantClipGM() { }
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protected:
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SkString onShortName() {
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return SkString("distantclip");
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}
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SkISize onISize() { return SkISize::Make(100, 100); }
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virtual void onDraw(SkCanvas* canvas) {
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static const SkScalar kOffset = 35000.0f;
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static const SkScalar kExtents = 1000.0f;
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SkPictureRecorder recorder;
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// We record a picture of huge vertical extents in which we clear the canvas to red, create
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// a 'extents' by 'extents' round rect clip at a vertical offset of 'offset', then draw
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// green into that.
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SkCanvas* rec = recorder.beginRecording(kExtents, kOffset + kExtents, nullptr, 0);
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rec->drawColor(SK_ColorRED);
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rec->save();
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SkRect r = SkRect::MakeXYWH(-kExtents, kOffset - kExtents, 2 * kExtents, 2 * kExtents);
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SkPath p;
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p.addRoundRect(r, 5, 5);
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rec->clipPath(p, SkRegion::kIntersect_Op, true);
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rec->drawColor(SK_ColorGREEN);
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rec->restore();
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SkAutoTUnref<SkPicture> pict(recorder.endRecording());
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// Next we play that picture into another picture of the same size.
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pict->playback(recorder.beginRecording(pict->cullRect().width(),
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pict->cullRect().height(),
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nullptr, 0));
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SkAutoTUnref<SkPicture> pict2(recorder.endRecording());
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// Finally we play the part of that second picture that should be green into the canvas.
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canvas->save();
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canvas->translate(kExtents / 2, -(kOffset - kExtents / 2));
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pict2->playback(canvas);
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canvas->restore();
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// If the image is red, we erroneously decided the clipPath was empty and didn't record
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// the green drawColor, if it's green we're all good.
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}
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private:
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typedef GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new DistantClipGM; }
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static GMRegistry reg(MyFactory);
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}
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