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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 "src/gpu/GrNonAtomicRef.h"
#include "src/gpu/ccpr/GrCCAtlas.h"
#include "src/gpu/ccpr/GrCCFiller.h"
#include "src/gpu/ccpr/GrCCPathProcessor.h"
#include "src/gpu/ccpr/GrCCStroker.h"
#include "src/gpu/ccpr/GrStencilAtlasOp.h"
class GrCCPathCache;
class GrCCPathCacheEntry;
class GrOctoBounds;
class GrOnFlushResourceProvider;
class GrShape;
* This struct counts values that help us preallocate buffers for rendered path geometry.
struct GrCCRenderedPathStats {
int fMaxPointsPerPath = 0;
int fNumTotalSkPoints = 0;
int fNumTotalSkVerbs = 0;
int fNumTotalConicWeights = 0;
void statPath(const SkPath&);
* This struct encapsulates the minimum and desired requirements for the GPU resources required by
* CCPR in a given flush.
struct GrCCPerFlushResourceSpecs {
static constexpr int kFillIdx = 0;
static constexpr int kStrokeIdx = 1;
int fNumCachedPaths = 0;
int fNumCopiedPaths[2] = {0, 0};
GrCCRenderedPathStats fCopyPathStats[2];
GrCCAtlas::Specs fCopyAtlasSpecs;
int fNumRenderedPaths[2] = {0, 0};
int fNumClipPaths = 0;
GrCCRenderedPathStats fRenderedPathStats[2];
GrCCAtlas::Specs fRenderedAtlasSpecs;
bool isEmpty() const {
return 0 == fNumCachedPaths + fNumCopiedPaths[kFillIdx] + fNumCopiedPaths[kStrokeIdx] +
fNumRenderedPaths[kFillIdx] + fNumRenderedPaths[kStrokeIdx] + fNumClipPaths;
// Converts the copies to normal cached draws.
void cancelCopies();
* 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 GrCCPerOpsTaskPaths objects that are being flushed.
* It is deleted in postFlush() once all the flushing GrCCPerOpsTaskPaths objects are deleted.
class GrCCPerFlushResources : public GrNonAtomicRef<GrCCPerFlushResources> {
GrOnFlushResourceProvider*, GrCCAtlas::CoverageType,const GrCCPerFlushResourceSpecs&);
bool isMapped() const { return SkToBool(fPathInstanceData); }
GrCCAtlas::CoverageType renderedPathCoverageType() const {
return fRenderedAtlasStack.coverageType();
// Copies a coverage-counted path out of the given texture proxy, and into a cached, 8-bit,
// literal coverage atlas. Updates the cache entry to reference the new atlas.
void upgradeEntryToLiteralCoverageAtlas(GrCCPathCache*, GrOnFlushResourceProvider*,
GrCCPathCacheEntry*, GrFillRule);
// These two methods render a path into a temporary coverage count atlas. See
// GrCCPathProcessor::Instance for a description of the outputs.
// strokeDevWidth must be 0 for fills, 1 for hairlines, or the stroke width in device-space
// pixels for non-hairline strokes (implicitly requiring a rigid-body transform).
GrCCAtlas* renderShapeInAtlas(
const SkIRect& clipIBounds, const SkMatrix&, const GrShape&, float strokeDevWidth,
GrOctoBounds*, SkIRect* devIBounds, SkIVector* devToAtlasOffset);
const GrCCAtlas* renderDeviceSpacePathInAtlas(
const SkIRect& clipIBounds, const SkPath& devPath, const SkIRect& devPathIBounds,
GrFillRule fillRule, 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(fNextPathInstanceIdx < fEndPathInstance);
return fPathInstanceData[fNextPathInstanceIdx++];
// Finishes off the GPU buffers and renders the atlas(es).
bool finalize(GrOnFlushResourceProvider*);
// Accessors used by draw calls, once the resources have been finalized.
const GrCCFiller& filler() const { SkASSERT(!this->isMapped()); return fFiller; }
const GrCCStroker& stroker() const { SkASSERT(!this->isMapped()); return fStroker; }
sk_sp<const GrGpuBuffer> refIndexBuffer() const {
return fIndexBuffer;
sk_sp<const GrGpuBuffer> refVertexBuffer() const {
return fVertexBuffer;
sk_sp<const GrGpuBuffer> refInstanceBuffer() const {
return fInstanceBuffer;
sk_sp<const GrGpuBuffer> refStencilResolveBuffer() const {
return fStencilResolveBuffer;
void recordCopyPathInstance(const GrCCPathCacheEntry&, const SkIVector& newAtlasOffset,
GrFillRule, sk_sp<GrTextureProxy> srcProxy);
void placeRenderedPathInAtlas(
const SkIRect& clippedPathIBounds, GrScissorTest, SkIVector* devToAtlasOffset);
// In MSAA mode we record an additional instance per path that draws a rectangle on top of its
// corresponding path in the atlas and resolves stencil winding values to coverage.
void recordStencilResolveInstance(
const SkIRect& clippedPathIBounds, const SkIVector& devToAtlasOffset, GrFillRule);
const SkAutoSTArray<32, SkPoint> fLocalDevPtsBuffer;
GrCCFiller fFiller;
GrCCStroker fStroker;
GrCCAtlasStack fCopyAtlasStack;
GrCCAtlasStack fRenderedAtlasStack;
const sk_sp<const GrGpuBuffer> fIndexBuffer;
const sk_sp<const GrGpuBuffer> fVertexBuffer;
const sk_sp<GrGpuBuffer> fInstanceBuffer;
GrCCPathProcessor::Instance* fPathInstanceData = nullptr;
int fNextCopyInstanceIdx;
SkDEBUGCODE(int fEndCopyInstance);
int fNextPathInstanceIdx;
int fBasePathInstanceIdx;
SkDEBUGCODE(int fEndPathInstance);
// Represents a range of copy-path instances that all share the same source proxy. (i.e. Draw
// instances that copy a path mask from a 16-bit coverage count atlas into an 8-bit literal
// coverage atlas.)
struct CopyPathRange {
CopyPathRange() = default;
CopyPathRange(sk_sp<GrTextureProxy> srcProxy, int count)
: fSrcProxy(std::move(srcProxy)), fCount(count) {}
sk_sp<GrTextureProxy> fSrcProxy;
int fCount;
SkSTArray<4, CopyPathRange> fCopyPathRanges;
int fCurrCopyAtlasRangesIdx = 0;
// This is a list of coverage count atlas textures that have been invalidated due to us copying
// their paths into new 8-bit literal coverage atlases. Since copying is finished by the time
// we begin rendering new atlases, we can recycle these textures for the rendered atlases rather
// than allocating new texture objects upon instantiation.
SkSTArray<2, sk_sp<GrTexture>> fRecyclableAtlasTextures;
// Used in MSAA mode make an intermediate draw that resolves stencil winding values to coverage.
sk_sp<GrGpuBuffer> fStencilResolveBuffer;
GrStencilAtlasOp::ResolveRectInstance* fStencilResolveInstanceData = nullptr;
int fNextStencilResolveInstanceIdx = 0;
SkDEBUGCODE(int fEndStencilResolveInstance);
#ifdef SK_DEBUG
void debugOnly_didReuseRenderedPath() {
if (GrCCAtlas::CoverageType::kA8_Multisample == this->renderedPathCoverageType()) {
const GrTexture* testingOnly_frontCopyAtlasTexture() const;
const GrTexture* testingOnly_frontRenderedAtlasTexture() const;
inline void GrCCRenderedPathStats::statPath(const SkPath& path) {
fMaxPointsPerPath = SkTMax(fMaxPointsPerPath, path.countPoints());
fNumTotalSkPoints += path.countPoints();
fNumTotalSkVerbs += path.countVerbs();
fNumTotalConicWeights += SkPathPriv::ConicWeightCnt(path);