d007281c9a
Change-Id: Ic44e24057b95bb014504f02a736fb4341afc8971 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/304856 Commit-Queue: Mike Klein <mtklein@google.com> Reviewed-by: Mike Klein <mtklein@google.com>
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*
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* Copyright 2011 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/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPath.h"
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#include "samplecode/Sample.h"
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///////////////////////////////////////////////////////////////////////////////
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class LayerMaskView : public Sample {
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public:
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LayerMaskView() {
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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SkString name() override { return SkString("LayerMask"); }
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void drawMask(SkCanvas* canvas, const SkRect& r) {
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SkPaint paint;
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paint.setAntiAlias(true);
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if (true) {
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SkBitmap mask;
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int w = SkScalarRoundToInt(r.width());
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int h = SkScalarRoundToInt(r.height());
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mask.allocN32Pixels(w, h);
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mask.eraseColor(SK_ColorTRANSPARENT);
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SkCanvas c(mask);
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SkRect bounds = r;
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bounds.offset(-bounds.fLeft, -bounds.fTop);
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c.drawOval(bounds, paint);
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paint.setBlendMode(SkBlendMode::kDstIn);
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canvas->drawBitmap(mask, r.fLeft, r.fTop, &paint);
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} else {
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SkPath p;
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p.addOval(r);
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p.setFillType(SkPathFillType::kInverseWinding);
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paint.setBlendMode(SkBlendMode::kDstOut);
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canvas->drawPath(p, paint);
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}
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}
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void onDrawContent(SkCanvas* canvas) override {
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SkRect r;
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r.setLTRB(20, 20, 120, 120);
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canvas->saveLayer(&r, nullptr);
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canvas->drawColor(SK_ColorRED);
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drawMask(canvas, r);
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canvas->restore();
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}
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private:
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typedef Sample INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new LayerMaskView(); )
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