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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrClipStackClip_DEFINED
#define GrClipStackClip_DEFINED
#include "GrClip.h"
#include "GrReducedClip.h"
#include "SkClipStack.h"
class GrPathRenderer;
class GrTexture;
class GrTextureProvider;
class GrUniqueKey;
/**
* GrClipStackClip can apply a generic SkClipStack to the draw state. It may need to generate an
* 8-bit alpha clip mask and/or modify the stencil buffer during apply().
*/
class GrClipStackClip final : public GrClip {
public:
GrClipStackClip(const SkClipStack* stack = nullptr, const SkIPoint* origin = nullptr) {
this->reset(stack, origin);
}
void reset(const SkClipStack* stack = nullptr, const SkIPoint* origin = nullptr) {
fOrigin = origin ? *origin : SkIPoint::Make(0, 0);
fStack.reset(SkSafeRef(stack));
}
bool quickContains(const SkRect&) const final;
bool quickContains(const SkRRect&) const final;
void getConservativeBounds(int width, int height, SkIRect* devResult,
bool* isIntersectionOfRects) const final;
bool apply(GrContext*, GrRenderTargetContext*, bool useHWAA, bool hasUserStencilSettings,
GrAppliedClip* out) const final;
bool isRRect(const SkRect& rtBounds, SkRRect* rr, bool* aa) const override;
private:
static bool PathNeedsSWRenderer(GrContext* context,
bool hasUserStencilSettings,
const GrRenderTargetContext*,
const SkMatrix& viewMatrix,
const SkClipStack::Element* element,
GrPathRenderer** prOut,
bool needsStencil);
// Creates an alpha mask of the clip. The mask is a rasterization of elements through the
// rect specified by clipSpaceIBounds.
static sk_sp<GrTexture> CreateAlphaClipMask(GrContext*, const GrReducedClip&);
// Similar to createAlphaClipMask but it rasterizes in SW and uploads to the result texture.
static sk_sp<GrTexture> CreateSoftwareClipMask(GrTextureProvider*, const GrReducedClip&);
static bool UseSWOnlyPath(GrContext*,
bool hasUserStencilSettings,
const GrRenderTargetContext*,
const GrReducedClip&);
static GrTexture* CreateCachedMask(int width, int height, const GrUniqueKey& key,
bool renderTarget);
SkIPoint fOrigin;
sk_sp<const SkClipStack> fStack;
};
#endif // GrClipStackClip_DEFINED
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