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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrCCPerFlushResources_DEFINED
#define GrCCPerFlushResources_DEFINED
#include "GrNonAtomicRef.h"
#include "ccpr/GrCCAtlas.h"
#include "ccpr/GrCCPathParser.h"
#include "ccpr/GrCCPathProcessor.h"
/**
* This struct encapsulates the minimum and desired requirements for the GPU resources required by
* CCPR in a given flush.
*/
struct GrCCPerFlushResourceSpecs {
int fNumRenderedPaths = 0;
int fNumClipPaths = 0;
GrCCPathParser::PathStats fParsingPathStats;
GrCCAtlas::Specs fAtlasSpecs;
bool isEmpty() const { return 0 == fNumRenderedPaths + fNumClipPaths; }
};
/**
* This class wraps all the GPU resources that CCPR builds at flush time. It is allocated in CCPR's
* preFlush() method, and referenced by all the GrCCPerOpListPaths objects that are being flushed.
* It is deleted in postFlush() once all the flushing GrCCPerOpListPaths objects are deleted.
*/
class GrCCPerFlushResources : public GrNonAtomicRef<GrCCPerFlushResources> {
public:
GrCCPerFlushResources(GrOnFlushResourceProvider*, const GrCCPerFlushResourceSpecs&);
bool isMapped() const { return SkToBool(fPathInstanceData); }
// Renders a path into a temporary atlas. See GrCCPathParser for a description of the arguments.
const GrCCAtlas* renderPathInAtlas(const SkIRect& clipIBounds, const SkMatrix&, const SkPath&,
SkRect* devBounds, SkRect* devBounds45,
SkIVector* devToAtlasOffset);
const GrCCAtlas* renderDeviceSpacePathInAtlas(const SkIRect& clipIBounds, const SkPath& devPath,
const SkIRect& devPathIBounds,
SkIVector* devToAtlasOffset);
// Returns the index in instanceBuffer() of the next instance that will be added by
// appendDrawPathInstance().
int nextPathInstanceIdx() const { return fNextPathInstanceIdx; }
// Appends an instance to instanceBuffer() that will draw a path to the destination render
// target. The caller is responsible to call set() on the returned instance, to keep track of
// its atlas and index (see nextPathInstanceIdx()), and to issue the actual draw call.
GrCCPathProcessor::Instance& appendDrawPathInstance() {
SkASSERT(this->isMapped());
SkASSERT(fNextPathInstanceIdx < fEndPathInstance);
return fPathInstanceData[fNextPathInstanceIdx++];
}
// Finishes off the GPU buffers and renders the atlas(es).
bool finalize(GrOnFlushResourceProvider*, SkTArray<sk_sp<GrRenderTargetContext>>* out);
// Accessors used by draw calls, once the resources have been finalized.
const GrCCPathParser& pathParser() const { SkASSERT(!this->isMapped()); return fPathParser; }
const GrBuffer* indexBuffer() const { SkASSERT(!this->isMapped()); return fIndexBuffer.get(); }
const GrBuffer* vertexBuffer() const { SkASSERT(!this->isMapped()); return fVertexBuffer.get();}
GrBuffer* instanceBuffer() const { SkASSERT(!this->isMapped()); return fInstanceBuffer.get(); }
private:
bool placeParsedPathInAtlas(const SkIRect& clipIBounds, const SkIRect& pathIBounds,
SkIVector* devToAtlasOffset);
GrCCPathParser fPathParser;
GrCCAtlasStack fAtlasStack;
const sk_sp<const GrBuffer> fIndexBuffer;
const sk_sp<const GrBuffer> fVertexBuffer;
const sk_sp<GrBuffer> fInstanceBuffer;
GrCCPathProcessor::Instance* fPathInstanceData = nullptr;
int fNextPathInstanceIdx = 0;
SkDEBUGCODE(int fEndPathInstance);
};
#endif
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