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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 "src/core/SkClipStack.h"
#include "src/gpu/GrClip.h"
#include "src/gpu/GrReducedClip.h"
class GrPathRenderer;
class GrTextureProxy;
* 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 {
GrClipStackClip(const SkISize& dimensions,
const SkClipStack* stack = nullptr,
const SkMatrixProvider* matrixProvider = nullptr)
: fDeviceSize(dimensions)
, fStack(stack)
, fMatrixProvider(matrixProvider) {}
SkIRect getConservativeBounds() const final;
Effect apply(GrRecordingContext*, GrSurfaceDrawContext*, GrAAType aaType,
bool hasUserStencilSettings, GrAppliedClip* out, SkRect* bounds) const final;
PreClipResult preApply(const SkRect& drawBounds, GrAA aa) const final;
sk_sp<GrTextureProxy> testingOnly_createClipMask(GrRecordingContext*) const;
static const char kMaskTestTag[];
static bool PathNeedsSWRenderer(GrRecordingContext* context,
const SkIRect& scissorRect,
bool hasUserStencilSettings,
const GrSurfaceDrawContext*,
const SkMatrix& viewMatrix,
const SkClipStack::Element* element,
bool needsStencil);
bool applyClipMask(GrRecordingContext*, GrSurfaceDrawContext*, const GrReducedClip&,
bool hasUserStencilSettings, GrAppliedClip*) const;
// Creates an alpha mask of the clip. The mask is a rasterization of elements through the
// rect specified by clipSpaceIBounds.
GrSurfaceProxyView createAlphaClipMask(GrRecordingContext*, const GrReducedClip&) const;
// Similar to createAlphaClipMask but it rasterizes in SW and uploads to the result texture.
GrSurfaceProxyView createSoftwareClipMask(GrRecordingContext*, const GrReducedClip&,
GrSurfaceDrawContext*) const;
static bool UseSWOnlyPath(GrRecordingContext*,
bool hasUserStencilSettings,
const GrSurfaceDrawContext*,
const GrReducedClip&);
// SkClipStack does not track device bounds explicitly, but it will refine these device bounds
// as clip elements are added to the stack.
SkISize fDeviceSize;
const SkClipStack* fStack;
const SkMatrixProvider* fMatrixProvider; // for applying clip shaders
#endif // GrClipStackClip_DEFINED