skia2/include/effects/SkLayerRasterizer.h
Mike Reed 09d9435835 remove lots of legacy flags
BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4209

Change-Id: I49ae36a9b2bb51a6470638d3264923ff4a4dea0a
Reviewed-on: https://skia-review.googlesource.com/4209
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2016-10-31 19:35:15 +00:00

88 lines
2.9 KiB
C++

/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkLayerRasterizer_DEFINED
#define SkLayerRasterizer_DEFINED
#include "SkRasterizer.h"
#include "SkDeque.h"
#include "SkScalar.h"
class SkPaint;
class SK_API SkLayerRasterizer : public SkRasterizer {
public:
virtual ~SkLayerRasterizer();
class SK_API Builder {
public:
Builder();
~Builder();
void addLayer(const SkPaint& paint) {
this->addLayer(paint, 0, 0);
}
/**
* Add a new layer (above any previous layers) to the rasterizer.
* The layer will extract those fields that affect the mask from
* the specified paint, but will not retain a reference to the paint
* object itself, so it may be reused without danger of side-effects.
*/
void addLayer(const SkPaint& paint, SkScalar dx, SkScalar dy);
/**
* Pass queue of layers on to newly created layer rasterizer and return it. The builder
* *cannot* be used any more after calling this function. If no layers have been added,
* returns NULL.
*
* The caller is responsible for calling unref() on the returned object, if non NULL.
*/
sk_sp<SkLayerRasterizer> detach();
/**
* Create and return a new immutable SkLayerRasterizer that contains a shapshot of the
* layers that were added to the Builder, without modifying the Builder. The Builder
* *may* be used after calling this function. It will continue to hold any layers
* previously added, so consecutive calls to this function will return identical objects,
* and objects returned by future calls to this function contain all the layers in
* previously returned objects. If no layers have been added, returns NULL.
*
* Future calls to addLayer will not affect rasterizers previously returned by this call.
*
* The caller is responsible for calling unref() on the returned object, if non NULL.
*/
sk_sp<SkLayerRasterizer> snapshot() const;
private:
SkDeque* fLayers;
};
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLayerRasterizer)
protected:
SkLayerRasterizer();
SkLayerRasterizer(SkDeque* layers);
void flatten(SkWriteBuffer&) const override;
// override from SkRasterizer
virtual bool onRasterize(const SkPath& path, const SkMatrix& matrix,
const SkIRect* clipBounds,
SkMask* mask, SkMask::CreateMode mode) const override;
private:
const SkDeque* const fLayers;
static SkDeque* ReadLayers(SkReadBuffer& buffer);
friend class LayerRasterizerTester;
typedef SkRasterizer INHERITED;
};
#endif