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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"
class GrCCPathCacheEntry;
class GrOnFlushResourceProvider;
/**
* This struct encapsulates the minimum and desired requirements for the GPU resources required by
* CCPR in a given flush.
*/
struct GrCCPerFlushResourceSpecs {
int fNumCachedPaths = 0;
int fNumCopiedPaths = 0;
GrCCPathParser::PathStats fCopyPathStats;
GrCCAtlas::Specs fCopyAtlasSpecs;
int fNumRenderedPaths = 0;
int fNumClipPaths = 0;
GrCCPathParser::PathStats fRenderedPathStats;
GrCCAtlas::Specs fRenderedAtlasSpecs;
bool isEmpty() const {
return 0 == fNumCachedPaths + fNumCopiedPaths + fNumRenderedPaths + fNumClipPaths;
}
void convertCopiesToRenders();
};
/**
* 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); }
// Copies a path out of the the previous flush's stashed mainline coverage count atlas, and into
// a cached, 8-bit, literal-coverage atlas. The actual source texture to copy from will be
// provided at the time finalize() is called.
GrCCAtlas* copyPathToCachedAtlas(const GrCCPathCacheEntry&, GrCCPathProcessor::DoEvenOddFill,
SkIVector* newAtlasOffset);
// These two methods render a path into a temporary coverage count atlas. See GrCCPathParser for
// a description of the arguments. The returned atlases are "const" to prevent the caller from
// assigning a unique key.
const GrCCAtlas* renderPathInAtlas(const SkIRect& clipIBounds, const SkMatrix&, const SkPath&,
SkRect* devBounds, SkRect* devBounds45, SkIRect* devIBounds,
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). 'stashedAtlasProxy', if provided, is
// the mainline coverage count atlas from the previous flush. It will be used as the source
// texture for any copies setup by copyStashedPathToAtlas().
bool finalize(GrOnFlushResourceProvider*, sk_sp<GrTextureProxy> stashedAtlasProxy,
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(); }
// Returns the mainline coverage count atlas that the client may stash for next flush, if any.
// The caller is responsible to call getOrAssignUniqueKey() on this atlas if they wish to
// actually stash it in order to copy paths into cached atlases.
GrCCAtlas* nextAtlasToStash() {
return fRenderedAtlasStack.empty() ? nullptr : &fRenderedAtlasStack.front();
}
// Returs true if the client has called getOrAssignUniqueKey() on our nextAtlasToStash().
bool hasStashedAtlas() const {
return !fRenderedAtlasStack.empty() && fRenderedAtlasStack.front().uniqueKey().isValid();
}
const GrUniqueKey& stashedAtlasKey() const {
SkASSERT(this->hasStashedAtlas());
return fRenderedAtlasStack.front().uniqueKey();
}
private:
bool placeParsedPathInAtlas(const SkIRect& clipIBounds, const SkIRect& pathIBounds,
SkIVector* devToAtlasOffset);
GrCCPathParser fPathParser;
GrCCAtlasStack fCopyAtlasStack;
GrCCAtlasStack fRenderedAtlasStack;
const sk_sp<const GrBuffer> fIndexBuffer;
const sk_sp<const GrBuffer> fVertexBuffer;
const sk_sp<GrBuffer> fInstanceBuffer;
GrCCPathProcessor::Instance* fPathInstanceData = nullptr;
int fNextCopyInstanceIdx;
SkDEBUGCODE(int fEndCopyInstance);
int fNextPathInstanceIdx;
SkDEBUGCODE(int fEndPathInstance);
};
#endif
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