skia2/samplecode/SampleLayerMask.cpp
Mike Reed e1af44498b add guard to switch to SkPathTypes
Change-Id: I44d8b5ae8a5172d11a6d4cd9d994373dd3816d6f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/241278
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
2019-09-14 01:26:38 +00:00

67 lines
1.8 KiB
C++

/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "samplecode/Sample.h"
///////////////////////////////////////////////////////////////////////////////
class LayerMaskView : public Sample {
public:
LayerMaskView() {
this->setBGColor(0xFFDDDDDD);
}
protected:
virtual SkString name() { return SkString("LayerMask"); }
void drawMask(SkCanvas* canvas, const SkRect& r) {
SkPaint paint;
paint.setAntiAlias(true);
if (true) {
SkBitmap mask;
int w = SkScalarRoundToInt(r.width());
int h = SkScalarRoundToInt(r.height());
mask.allocN32Pixels(w, h);
mask.eraseColor(SK_ColorTRANSPARENT);
SkCanvas c(mask);
SkRect bounds = r;
bounds.offset(-bounds.fLeft, -bounds.fTop);
c.drawOval(bounds, paint);
paint.setBlendMode(SkBlendMode::kDstIn);
canvas->drawBitmap(mask, r.fLeft, r.fTop, &paint);
} else {
SkPath p;
p.addOval(r);
p.setFillType(SkPathFillType::kInverseWinding);
paint.setBlendMode(SkBlendMode::kDstOut);
canvas->drawPath(p, paint);
}
}
virtual void onDrawContent(SkCanvas* canvas) {
SkRect r;
r.setLTRB(20, 20, 120, 120);
canvas->saveLayer(&r, nullptr);
canvas->drawColor(SK_ColorRED);
drawMask(canvas, r);
canvas->restore();
}
private:
typedef Sample INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new LayerMaskView(); )