src/gpu/ccpr/GrCCDrawPathsOp.cpp - skia.git - Git at Google

 /*
  * Copyright 2018 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "GrCCDrawPathsOp.h"

 #include "GrContext.h"
 #include "GrContextPriv.h"
 #include "GrMemoryPool.h"
 #include "GrOpFlushState.h"
 #include "ccpr/GrCCPathCache.h"
 #include "ccpr/GrCCPerFlushResources.h"
 #include "ccpr/GrCoverageCountingPathRenderer.h"

 static bool has_coord_transforms(const GrPaint& paint) {
     GrFragmentProcessor::Iter iter(paint);
     while (const GrFragmentProcessor* fp = iter.next()) {
         if (!fp->coordTransforms().empty()) {
             return true;
         }
     }
     return false;
 }

 static int64_t area(const SkIRect& r) {
     return sk_64_mul(r.height(), r.width());
 }

 std::unique_ptr<GrCCDrawPathsOp> GrCCDrawPathsOp::Make(
         GrContext* context, const SkIRect& clipIBounds, const SkMatrix& m, const GrShape& shape,
         GrPaint&& paint) {
     SkRect conservativeDevBounds;
     m.mapRect(&conservativeDevBounds, shape.bounds());

     const SkStrokeRec& stroke = shape.style().strokeRec();
     float strokeDevWidth = 0;
     float conservativeInflationRadius = 0;
     if (!stroke.isFillStyle()) {
         strokeDevWidth = GrCoverageCountingPathRenderer::GetStrokeDevWidth(
                 m, stroke, &conservativeInflationRadius);
         conservativeDevBounds.outset(conservativeInflationRadius, conservativeInflationRadius);
     }

     std::unique_ptr<GrCCDrawPathsOp> op;
     float conservativeSize = SkTMax(conservativeDevBounds.height(), conservativeDevBounds.width());
     if (conservativeSize > GrCoverageCountingPathRenderer::kPathCropThreshold) {
         // The path is too large. Crop it or analytic AA can run out of fp32 precision.
         SkPath croppedDevPath;
         shape.asPath(&croppedDevPath);
         croppedDevPath.transform(m, &croppedDevPath);

         SkIRect cropBox = clipIBounds;
         GrShape croppedDevShape;
         if (stroke.isFillStyle()) {
             GrCoverageCountingPathRenderer::CropPath(croppedDevPath, cropBox, &croppedDevPath);
             croppedDevShape = GrShape(croppedDevPath);
             conservativeDevBounds = croppedDevShape.bounds();
         } else {
             int r = SkScalarCeilToInt(conservativeInflationRadius);
             cropBox.outset(r, r);
             GrCoverageCountingPathRenderer::CropPath(croppedDevPath, cropBox, &croppedDevPath);
             SkStrokeRec devStroke = stroke;
             devStroke.setStrokeStyle(strokeDevWidth);
             croppedDevShape = GrShape(croppedDevPath, GrStyle(devStroke, nullptr));
             conservativeDevBounds = croppedDevPath.getBounds();
             conservativeDevBounds.outset(conservativeInflationRadius, conservativeInflationRadius);
         }

         // FIXME: This breaks local coords: http://skbug.com/8003
         return InternalMake(context, clipIBounds, SkMatrix::I(), croppedDevShape, strokeDevWidth,
                             conservativeDevBounds, std::move(paint));
     }

     return InternalMake(context, clipIBounds, m, shape, strokeDevWidth, conservativeDevBounds,
                         std::move(paint));
 }

 std::unique_ptr<GrCCDrawPathsOp> GrCCDrawPathsOp::InternalMake(
         GrContext* context, const SkIRect& clipIBounds, const SkMatrix& m, const GrShape& shape,
         float strokeDevWidth, const SkRect& conservativeDevBounds, GrPaint&& paint) {
     // The path itself should have been cropped if larger than kPathCropThreshold. If it had a
     // stroke, that would have further inflated its draw bounds.
     SkASSERT(SkTMax(conservativeDevBounds.height(), conservativeDevBounds.width()) <
              GrCoverageCountingPathRenderer::kPathCropThreshold +
              GrCoverageCountingPathRenderer::kMaxBoundsInflationFromStroke*2 + 1);

     SkIRect shapeConservativeIBounds;
     conservativeDevBounds.roundOut(&shapeConservativeIBounds);

     SkIRect maskDevIBounds;
     Visibility maskVisibility;
     if (clipIBounds.contains(shapeConservativeIBounds)) {
         maskDevIBounds = shapeConservativeIBounds;
         maskVisibility = Visibility::kComplete;
     } else {
         if (!maskDevIBounds.intersect(clipIBounds, shapeConservativeIBounds)) {
             return nullptr;
         }
         int64_t unclippedArea = area(shapeConservativeIBounds);
         int64_t clippedArea = area(maskDevIBounds);
         maskVisibility = (clippedArea >= unclippedArea/2 || unclippedArea < 100*100)
                 ? Visibility::kMostlyComplete  // i.e., visible enough to justify rendering the
                                                // whole thing if we think we can cache it.
                 : Visibility::kPartial;
     }

     GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();

     return pool->allocate<GrCCDrawPathsOp>(m, shape, strokeDevWidth, shapeConservativeIBounds,
                                            maskDevIBounds, maskVisibility, conservativeDevBounds,
                                            std::move(paint));
 }

 GrCCDrawPathsOp::GrCCDrawPathsOp(const SkMatrix& m, const GrShape& shape, float strokeDevWidth,
                                  const SkIRect& shapeConservativeIBounds,
                                  const SkIRect& maskDevIBounds, Visibility maskVisibility,
                                  const SkRect& conservativeDevBounds, GrPaint&& paint)
         : GrDrawOp(ClassID())
         , fViewMatrixIfUsingLocalCoords(has_coord_transforms(paint) ? m : SkMatrix::I())
         , fDraws(m, shape, strokeDevWidth, shapeConservativeIBounds, maskDevIBounds, maskVisibility,
                  paint.getColor4f())
         , fProcessors(std::move(paint)) {  // Paint must be moved after fetching its color above.
     SkDEBUGCODE(fBaseInstance = -1);
     // FIXME: intersect with clip bounds to (hopefully) improve batching.
     // (This is nontrivial due to assumptions in generating the octagon cover geometry.)
     this->setBounds(conservativeDevBounds, GrOp::HasAABloat::kYes, GrOp::IsZeroArea::kNo);
 }

 GrCCDrawPathsOp::~GrCCDrawPathsOp() {
     if (fOwningPerOpListPaths) {
         // Remove the list's dangling pointer to this Op before deleting it.
         fOwningPerOpListPaths->fDrawOps.remove(this);
     }
 }

 GrCCDrawPathsOp::SingleDraw::SingleDraw(const SkMatrix& m, const GrShape& shape,
                                         float strokeDevWidth,
                                         const SkIRect& shapeConservativeIBounds,
                                         const SkIRect& maskDevIBounds, Visibility maskVisibility,
                                         const SkPMColor4f& color)
         : fMatrix(m)
         , fShape(shape)
         , fStrokeDevWidth(strokeDevWidth)
         , fShapeConservativeIBounds(shapeConservativeIBounds)
         , fMaskDevIBounds(maskDevIBounds)
         , fMaskVisibility(maskVisibility)
         , fColor(color) {
 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
     if (fShape.hasUnstyledKey()) {
         // On AOSP we round view matrix translates to integer values for cachable paths. We do this
         // to match HWUI's cache hit ratio, which doesn't consider the matrix when caching paths.
         fMatrix.setTranslateX(SkScalarRoundToScalar(fMatrix.getTranslateX()));
         fMatrix.setTranslateY(SkScalarRoundToScalar(fMatrix.getTranslateY()));
     }
 #endif
 }

 GrDrawOp::RequiresDstTexture GrCCDrawPathsOp::finalize(const GrCaps& caps,
                                                        const GrAppliedClip* clip) {
     SkASSERT(1 == fNumDraws);  // There should only be one single path draw in this Op right now.
     SingleDraw* draw = &fDraws.head();

     const GrProcessorSet::Analysis& analysis = fProcessors.finalize(
             draw->fColor, GrProcessorAnalysisCoverage::kSingleChannel, clip, false, caps,
             &draw->fColor);

     // Lines start looking jagged when they get thinner than 1px. For thin strokes it looks better
     // if we can convert them to hairline (i.e., inflate the stroke width to 1px), and instead
     // reduce the opacity to create the illusion of thin-ness. This strategy also helps reduce
     // artifacts from coverage dilation when there are self intersections.
     if (analysis.isCompatibleWithCoverageAsAlpha() &&
             !draw->fShape.style().strokeRec().isFillStyle() && draw->fStrokeDevWidth < 1) {
         // Modifying the shape affects its cache key. The draw can't have a cache entry yet or else
         // our next step would invalidate it.
         SkASSERT(!draw->fCacheEntry);
         SkASSERT(SkStrokeRec::kStroke_Style == draw->fShape.style().strokeRec().getStyle());

         SkPath path;
         draw->fShape.asPath(&path);

         // Create a hairline version of our stroke.
         SkStrokeRec hairlineStroke = draw->fShape.style().strokeRec();
         hairlineStroke.setStrokeStyle(0);

         // How transparent does a 1px stroke have to be in order to appear as thin as the real one?
         float coverage = draw->fStrokeDevWidth;

         draw->fShape = GrShape(path, GrStyle(hairlineStroke, nullptr));
         draw->fStrokeDevWidth = 1;

         // TODO4F: Preserve float colors
         // fShapeConservativeIBounds already accounted for this possibility of inflating the stroke.
         draw->fColor = draw->fColor * coverage;
     }

     return RequiresDstTexture(analysis.requiresDstTexture());
 }

 GrOp::CombineResult GrCCDrawPathsOp::onCombineIfPossible(GrOp* op, const GrCaps&) {
     GrCCDrawPathsOp* that = op->cast<GrCCDrawPathsOp>();
     SkASSERT(fOwningPerOpListPaths);
     SkASSERT(fNumDraws);
     SkASSERT(!that->fOwningPerOpListPaths || that->fOwningPerOpListPaths == fOwningPerOpListPaths);
     SkASSERT(that->fNumDraws);

     if (fProcessors != that->fProcessors ||
         fViewMatrixIfUsingLocalCoords != that->fViewMatrixIfUsingLocalCoords) {
         return CombineResult::kCannotCombine;
     }

     fDraws.append(std::move(that->fDraws), &fOwningPerOpListPaths->fAllocator);

     SkDEBUGCODE(fNumDraws += that->fNumDraws);
     SkDEBUGCODE(that->fNumDraws = 0);
     return CombineResult::kMerged;
 }

 void GrCCDrawPathsOp::addToOwningPerOpListPaths(sk_sp<GrCCPerOpListPaths> owningPerOpListPaths) {
     SkASSERT(1 == fNumDraws);
     SkASSERT(!fOwningPerOpListPaths);
     fOwningPerOpListPaths = std::move(owningPerOpListPaths);
     fOwningPerOpListPaths->fDrawOps.addToTail(this);
 }

 void GrCCDrawPathsOp::accountForOwnPaths(GrCCPathCache* pathCache,
                                          GrOnFlushResourceProvider* onFlushRP,
                                          GrCCPerFlushResourceSpecs* specs) {
     using CreateIfAbsent = GrCCPathCache::CreateIfAbsent;
     using MaskTransform = GrCCPathCache::MaskTransform;
     using CoverageType = GrCCAtlas::CoverageType;

     for (SingleDraw& draw : fDraws) {
         SkPath path;
         draw.fShape.asPath(&path);

         SkASSERT(!draw.fCacheEntry);

         if (pathCache) {
             MaskTransform m(draw.fMatrix, &draw.fCachedMaskShift);
             bool canStashPathMask = draw.fMaskVisibility >= Visibility::kMostlyComplete;
             draw.fCacheEntry =
                     pathCache->find(onFlushRP, draw.fShape, m, CreateIfAbsent(canStashPathMask));
         }

         if (draw.fCacheEntry) {
             if (const GrCCCachedAtlas* cachedAtlas = draw.fCacheEntry->cachedAtlas()) {
                 SkASSERT(cachedAtlas->getOnFlushProxy());
                 if (CoverageType::kA8_LiteralCoverage == cachedAtlas->coverageType()) {
                     ++specs->fNumCachedPaths;
                 } else {
                     // Suggest that this path be copied to a literal coverage atlas, to save memory.
                     // (The client may decline this copy via DoCopiesToA8Coverage::kNo.)
                     int idx = (draw.fShape.style().strokeRec().isFillStyle())
                             ? GrCCPerFlushResourceSpecs::kFillIdx
                             : GrCCPerFlushResourceSpecs::kStrokeIdx;
                     ++specs->fNumCopiedPaths[idx];
                     specs->fCopyPathStats[idx].statPath(path);
                     specs->fCopyAtlasSpecs.accountForSpace(
                             draw.fCacheEntry->width(), draw.fCacheEntry->height());
                     draw.fDoCopyToA8Coverage = true;
                 }
                 continue;
             }

             if (Visibility::kMostlyComplete == draw.fMaskVisibility &&
                     draw.fCacheEntry->hitCount() > 1) {
                 int shapeSize = SkTMax(draw.fShapeConservativeIBounds.height(),
                                        draw.fShapeConservativeIBounds.width());
                 if (shapeSize <= onFlushRP->caps()->maxRenderTargetSize()) {
                     // We've seen this path before with a compatible matrix, and it's mostly
                     // visible. Just render the whole mask so we can try to cache it.
                     draw.fMaskDevIBounds = draw.fShapeConservativeIBounds;
                     draw.fMaskVisibility = Visibility::kComplete;
                 }
             }
         }

         int idx = (draw.fShape.style().strokeRec().isFillStyle())
                 ? GrCCPerFlushResourceSpecs::kFillIdx
                 : GrCCPerFlushResourceSpecs::kStrokeIdx;
         ++specs->fNumRenderedPaths[idx];
         specs->fRenderedPathStats[idx].statPath(path);
         specs->fRenderedAtlasSpecs.accountForSpace(draw.fMaskDevIBounds.width(),
                                                    draw.fMaskDevIBounds.height());
     }
 }

 void GrCCDrawPathsOp::setupResources(
         GrCCPathCache* pathCache, GrOnFlushResourceProvider* onFlushRP,
         GrCCPerFlushResources* resources, DoCopiesToA8Coverage doCopies) {
     using DoEvenOddFill = GrCCPathProcessor::DoEvenOddFill;
     SkASSERT(fNumDraws > 0);
     SkASSERT(-1 == fBaseInstance);
     fBaseInstance = resources->nextPathInstanceIdx();

     for (SingleDraw& draw : fDraws) {
         SkPath path;
         draw.fShape.asPath(&path);

         auto doEvenOddFill = DoEvenOddFill(draw.fShape.style().strokeRec().isFillStyle() &&
                                            SkPath::kEvenOdd_FillType == path.getFillType());
         SkASSERT(SkPath::kEvenOdd_FillType == path.getFillType() ||
                  SkPath::kWinding_FillType == path.getFillType());

         if (auto cacheEntry = draw.fCacheEntry.get()) {
             // Does the path already exist in a cached atlas texture?
             if (cacheEntry->cachedAtlas()) {
                 SkASSERT(cacheEntry->cachedAtlas()->getOnFlushProxy());
                 if (DoCopiesToA8Coverage::kYes == doCopies && draw.fDoCopyToA8Coverage) {
                     resources->upgradeEntryToLiteralCoverageAtlas(pathCache, onFlushRP, cacheEntry,
                                                                   doEvenOddFill);
                     SkASSERT(cacheEntry->cachedAtlas());
                     SkASSERT(GrCCAtlas::CoverageType::kA8_LiteralCoverage
                                      == cacheEntry->cachedAtlas()->coverageType());
                     SkASSERT(cacheEntry->cachedAtlas()->getOnFlushProxy());
                 }
                 this->recordInstance(cacheEntry->cachedAtlas()->getOnFlushProxy(),
                                      resources->nextPathInstanceIdx());
                 // TODO4F: Preserve float colors
                 resources->appendDrawPathInstance().set(*cacheEntry, draw.fCachedMaskShift,
                                                         draw.fColor.toBytes_RGBA());
                 continue;
             }
         }

         // Render the raw path into a coverage count atlas. renderShapeInAtlas() gives us two tight
         // bounding boxes: One in device space, as well as a second one rotated an additional 45
         // degrees. The path vertex shader uses these two bounding boxes to generate an octagon that
         // circumscribes the path.
         SkRect devBounds, devBounds45;
         SkIRect devIBounds;
         SkIVector devToAtlasOffset;
         if (auto atlas = resources->renderShapeInAtlas(
                     draw.fMaskDevIBounds, draw.fMatrix, draw.fShape, draw.fStrokeDevWidth,
                     &devBounds, &devBounds45, &devIBounds, &devToAtlasOffset)) {
             this->recordInstance(atlas->textureProxy(), resources->nextPathInstanceIdx());
             // TODO4F: Preserve float colors
             resources->appendDrawPathInstance().set(devBounds, devBounds45, devToAtlasOffset,
                                                     draw.fColor.toBytes_RGBA(), doEvenOddFill);

             // If we have a spot in the path cache, try to make a note of where this mask is so we
             // can reuse it in the future.
             if (auto cacheEntry = draw.fCacheEntry.get()) {
                 SkASSERT(!cacheEntry->cachedAtlas());

                 if (Visibility::kComplete != draw.fMaskVisibility || cacheEntry->hitCount() <= 1) {
                     // Don't cache a path mask unless it's completely visible with a hit count > 1.
                     //
                     // NOTE: mostly-visible paths with a hit count > 1 should have been promoted to
                     // fully visible during accountForOwnPaths().
                     continue;
                 }

                 cacheEntry->setCoverageCountAtlas(onFlushRP, atlas, devToAtlasOffset, devBounds,
                                                   devBounds45, devIBounds, draw.fCachedMaskShift);
             }
         }
     }

     if (!fInstanceRanges.empty()) {
         fInstanceRanges.back().fEndInstanceIdx = resources->nextPathInstanceIdx();
     }
 }

 inline void GrCCDrawPathsOp::recordInstance(GrTextureProxy* atlasProxy, int instanceIdx) {
     if (fInstanceRanges.empty()) {
         fInstanceRanges.push_back({atlasProxy, instanceIdx});
         return;
     }
     if (fInstanceRanges.back().fAtlasProxy != atlasProxy) {
         fInstanceRanges.back().fEndInstanceIdx = instanceIdx;
         fInstanceRanges.push_back({atlasProxy, instanceIdx});
         return;
     }
 }

 void GrCCDrawPathsOp::onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) {
     SkASSERT(fOwningPerOpListPaths);

     const GrCCPerFlushResources* resources = fOwningPerOpListPaths->fFlushResources.get();
     if (!resources) {
         return;  // Setup failed.
     }

     GrPipeline::InitArgs initArgs;
     initArgs.fProxy = flushState->drawOpArgs().fProxy;
     initArgs.fCaps = &flushState->caps();
     initArgs.fResourceProvider = flushState->resourceProvider();
     initArgs.fDstProxy = flushState->drawOpArgs().fDstProxy;
     auto clip = flushState->detachAppliedClip();
     GrPipeline::FixedDynamicState fixedDynamicState(clip.scissorState().rect());
     GrPipeline pipeline(initArgs, std::move(fProcessors), std::move(clip));

     int baseInstance = fBaseInstance;
     SkASSERT(baseInstance >= 0);  // Make sure setupResources() has been called.

     for (const InstanceRange& range : fInstanceRanges) {
         SkASSERT(range.fEndInstanceIdx > baseInstance);

         GrCCPathProcessor pathProc(range.fAtlasProxy, fViewMatrixIfUsingLocalCoords);
         GrTextureProxy* atlasProxy = range.fAtlasProxy;
         fixedDynamicState.fPrimitiveProcessorTextures = &atlasProxy;
         pathProc.drawPaths(flushState, pipeline, &fixedDynamicState, *resources, baseInstance,
                            range.fEndInstanceIdx, this->bounds());

         baseInstance = range.fEndInstanceIdx;
     }
 }
	/*
	* Copyright 2018 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "GrCCDrawPathsOp.h"

	#include "GrContext.h"
	#include "GrContextPriv.h"
	#include "GrMemoryPool.h"
	#include "GrOpFlushState.h"
	#include "ccpr/GrCCPathCache.h"
	#include "ccpr/GrCCPerFlushResources.h"
	#include "ccpr/GrCoverageCountingPathRenderer.h"

	static bool has_coord_transforms(const GrPaint& paint) {
	GrFragmentProcessor::Iter iter(paint);
	while (const GrFragmentProcessor* fp = iter.next()) {
	if (!fp->coordTransforms().empty()) {
	return true;
	}
	}
	return false;
	}

	static int64_t area(const SkIRect& r) {
	return sk_64_mul(r.height(), r.width());
	}

	std::unique_ptr<GrCCDrawPathsOp> GrCCDrawPathsOp::Make(
	GrContext* context, const SkIRect& clipIBounds, const SkMatrix& m, const GrShape& shape,
	GrPaint&& paint) {
	SkRect conservativeDevBounds;
	m.mapRect(&conservativeDevBounds, shape.bounds());

	const SkStrokeRec& stroke = shape.style().strokeRec();
	float strokeDevWidth = 0;
	float conservativeInflationRadius = 0;
	if (!stroke.isFillStyle()) {
	strokeDevWidth = GrCoverageCountingPathRenderer::GetStrokeDevWidth(
	m, stroke, &conservativeInflationRadius);
	conservativeDevBounds.outset(conservativeInflationRadius, conservativeInflationRadius);
	}

	std::unique_ptr<GrCCDrawPathsOp> op;
	float conservativeSize = SkTMax(conservativeDevBounds.height(), conservativeDevBounds.width());
	if (conservativeSize > GrCoverageCountingPathRenderer::kPathCropThreshold) {
	// The path is too large. Crop it or analytic AA can run out of fp32 precision.
	SkPath croppedDevPath;
	shape.asPath(&croppedDevPath);
	croppedDevPath.transform(m, &croppedDevPath);

	SkIRect cropBox = clipIBounds;
	GrShape croppedDevShape;
	if (stroke.isFillStyle()) {
	GrCoverageCountingPathRenderer::CropPath(croppedDevPath, cropBox, &croppedDevPath);
	croppedDevShape = GrShape(croppedDevPath);
	conservativeDevBounds = croppedDevShape.bounds();
	} else {
	int r = SkScalarCeilToInt(conservativeInflationRadius);
	cropBox.outset(r, r);
	GrCoverageCountingPathRenderer::CropPath(croppedDevPath, cropBox, &croppedDevPath);
	SkStrokeRec devStroke = stroke;
	devStroke.setStrokeStyle(strokeDevWidth);
	croppedDevShape = GrShape(croppedDevPath, GrStyle(devStroke, nullptr));
	conservativeDevBounds = croppedDevPath.getBounds();
	conservativeDevBounds.outset(conservativeInflationRadius, conservativeInflationRadius);
	}

	// FIXME: This breaks local coords: http://skbug.com/8003
	return InternalMake(context, clipIBounds, SkMatrix::I(), croppedDevShape, strokeDevWidth,
	conservativeDevBounds, std::move(paint));
	}

	return InternalMake(context, clipIBounds, m, shape, strokeDevWidth, conservativeDevBounds,
	std::move(paint));
	}

	std::unique_ptr<GrCCDrawPathsOp> GrCCDrawPathsOp::InternalMake(
	GrContext* context, const SkIRect& clipIBounds, const SkMatrix& m, const GrShape& shape,
	float strokeDevWidth, const SkRect& conservativeDevBounds, GrPaint&& paint) {
	// The path itself should have been cropped if larger than kPathCropThreshold. If it had a
	// stroke, that would have further inflated its draw bounds.
	SkASSERT(SkTMax(conservativeDevBounds.height(), conservativeDevBounds.width()) <
	GrCoverageCountingPathRenderer::kPathCropThreshold +
	GrCoverageCountingPathRenderer::kMaxBoundsInflationFromStroke*2 + 1);

	SkIRect shapeConservativeIBounds;
	conservativeDevBounds.roundOut(&shapeConservativeIBounds);

	SkIRect maskDevIBounds;
	Visibility maskVisibility;
	if (clipIBounds.contains(shapeConservativeIBounds)) {
	maskDevIBounds = shapeConservativeIBounds;
	maskVisibility = Visibility::kComplete;
	} else {
	if (!maskDevIBounds.intersect(clipIBounds, shapeConservativeIBounds)) {
	return nullptr;
	}
	int64_t unclippedArea = area(shapeConservativeIBounds);
	int64_t clippedArea = area(maskDevIBounds);
	maskVisibility = (clippedArea >= unclippedArea/2 \|\| unclippedArea < 100*100)
	? Visibility::kMostlyComplete // i.e., visible enough to justify rendering the
	// whole thing if we think we can cache it.
	: Visibility::kPartial;
	}

	GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();

	return pool->allocate<GrCCDrawPathsOp>(m, shape, strokeDevWidth, shapeConservativeIBounds,
	maskDevIBounds, maskVisibility, conservativeDevBounds,
	std::move(paint));
	}

	GrCCDrawPathsOp::GrCCDrawPathsOp(const SkMatrix& m, const GrShape& shape, float strokeDevWidth,
	const SkIRect& shapeConservativeIBounds,
	const SkIRect& maskDevIBounds, Visibility maskVisibility,
	const SkRect& conservativeDevBounds, GrPaint&& paint)
	: GrDrawOp(ClassID())
	, fViewMatrixIfUsingLocalCoords(has_coord_transforms(paint) ? m : SkMatrix::I())
	, fDraws(m, shape, strokeDevWidth, shapeConservativeIBounds, maskDevIBounds, maskVisibility,
	paint.getColor4f())
	, fProcessors(std::move(paint)) { // Paint must be moved after fetching its color above.
	SkDEBUGCODE(fBaseInstance = -1);
	// FIXME: intersect with clip bounds to (hopefully) improve batching.
	// (This is nontrivial due to assumptions in generating the octagon cover geometry.)
	this->setBounds(conservativeDevBounds, GrOp::HasAABloat::kYes, GrOp::IsZeroArea::kNo);
	}

	GrCCDrawPathsOp::~GrCCDrawPathsOp() {
	if (fOwningPerOpListPaths) {
	// Remove the list's dangling pointer to this Op before deleting it.
	fOwningPerOpListPaths->fDrawOps.remove(this);
	}
	}

	GrCCDrawPathsOp::SingleDraw::SingleDraw(const SkMatrix& m, const GrShape& shape,
	float strokeDevWidth,
	const SkIRect& shapeConservativeIBounds,
	const SkIRect& maskDevIBounds, Visibility maskVisibility,
	const SkPMColor4f& color)
	: fMatrix(m)
	, fShape(shape)
	, fStrokeDevWidth(strokeDevWidth)
	, fShapeConservativeIBounds(shapeConservativeIBounds)
	, fMaskDevIBounds(maskDevIBounds)
	, fMaskVisibility(maskVisibility)
	, fColor(color) {
	#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
	if (fShape.hasUnstyledKey()) {
	// On AOSP we round view matrix translates to integer values for cachable paths. We do this
	// to match HWUI's cache hit ratio, which doesn't consider the matrix when caching paths.
	fMatrix.setTranslateX(SkScalarRoundToScalar(fMatrix.getTranslateX()));
	fMatrix.setTranslateY(SkScalarRoundToScalar(fMatrix.getTranslateY()));
	}
	#endif
	}

	GrDrawOp::RequiresDstTexture GrCCDrawPathsOp::finalize(const GrCaps& caps,
	const GrAppliedClip* clip) {
	SkASSERT(1 == fNumDraws); // There should only be one single path draw in this Op right now.
	SingleDraw* draw = &fDraws.head();

	const GrProcessorSet::Analysis& analysis = fProcessors.finalize(
	draw->fColor, GrProcessorAnalysisCoverage::kSingleChannel, clip, false, caps,
	&draw->fColor);

	// Lines start looking jagged when they get thinner than 1px. For thin strokes it looks better
	// if we can convert them to hairline (i.e., inflate the stroke width to 1px), and instead
	// reduce the opacity to create the illusion of thin-ness. This strategy also helps reduce
	// artifacts from coverage dilation when there are self intersections.
	if (analysis.isCompatibleWithCoverageAsAlpha() &&
	!draw->fShape.style().strokeRec().isFillStyle() && draw->fStrokeDevWidth < 1) {
	// Modifying the shape affects its cache key. The draw can't have a cache entry yet or else
	// our next step would invalidate it.
	SkASSERT(!draw->fCacheEntry);
	SkASSERT(SkStrokeRec::kStroke_Style == draw->fShape.style().strokeRec().getStyle());

	SkPath path;
	draw->fShape.asPath(&path);

	// Create a hairline version of our stroke.
	SkStrokeRec hairlineStroke = draw->fShape.style().strokeRec();
	hairlineStroke.setStrokeStyle(0);

	// How transparent does a 1px stroke have to be in order to appear as thin as the real one?
	float coverage = draw->fStrokeDevWidth;

	draw->fShape = GrShape(path, GrStyle(hairlineStroke, nullptr));
	draw->fStrokeDevWidth = 1;

	// TODO4F: Preserve float colors
	// fShapeConservativeIBounds already accounted for this possibility of inflating the stroke.
	draw->fColor = draw->fColor * coverage;
	}

	return RequiresDstTexture(analysis.requiresDstTexture());
	}

	GrOp::CombineResult GrCCDrawPathsOp::onCombineIfPossible(GrOp* op, const GrCaps&) {
	GrCCDrawPathsOp* that = op->cast<GrCCDrawPathsOp>();
	SkASSERT(fOwningPerOpListPaths);
	SkASSERT(fNumDraws);
	SkASSERT(!that->fOwningPerOpListPaths \|\| that->fOwningPerOpListPaths == fOwningPerOpListPaths);
	SkASSERT(that->fNumDraws);

	if (fProcessors != that->fProcessors \|\|
	fViewMatrixIfUsingLocalCoords != that->fViewMatrixIfUsingLocalCoords) {
	return CombineResult::kCannotCombine;
	}

	fDraws.append(std::move(that->fDraws), &fOwningPerOpListPaths->fAllocator);

	SkDEBUGCODE(fNumDraws += that->fNumDraws);
	SkDEBUGCODE(that->fNumDraws = 0);
	return CombineResult::kMerged;
	}

	void GrCCDrawPathsOp::addToOwningPerOpListPaths(sk_sp<GrCCPerOpListPaths> owningPerOpListPaths) {
	SkASSERT(1 == fNumDraws);
	SkASSERT(!fOwningPerOpListPaths);
	fOwningPerOpListPaths = std::move(owningPerOpListPaths);
	fOwningPerOpListPaths->fDrawOps.addToTail(this);
	}

	void GrCCDrawPathsOp::accountForOwnPaths(GrCCPathCache* pathCache,
	GrOnFlushResourceProvider* onFlushRP,
	GrCCPerFlushResourceSpecs* specs) {
	using CreateIfAbsent = GrCCPathCache::CreateIfAbsent;
	using MaskTransform = GrCCPathCache::MaskTransform;
	using CoverageType = GrCCAtlas::CoverageType;

	for (SingleDraw& draw : fDraws) {
	SkPath path;
	draw.fShape.asPath(&path);

	SkASSERT(!draw.fCacheEntry);

	if (pathCache) {
	MaskTransform m(draw.fMatrix, &draw.fCachedMaskShift);
	bool canStashPathMask = draw.fMaskVisibility >= Visibility::kMostlyComplete;
	draw.fCacheEntry =
	pathCache->find(onFlushRP, draw.fShape, m, CreateIfAbsent(canStashPathMask));
	}

	if (draw.fCacheEntry) {
	if (const GrCCCachedAtlas* cachedAtlas = draw.fCacheEntry->cachedAtlas()) {
	SkASSERT(cachedAtlas->getOnFlushProxy());
	if (CoverageType::kA8_LiteralCoverage == cachedAtlas->coverageType()) {
	++specs->fNumCachedPaths;
	} else {
	// Suggest that this path be copied to a literal coverage atlas, to save memory.
	// (The client may decline this copy via DoCopiesToA8Coverage::kNo.)
	int idx = (draw.fShape.style().strokeRec().isFillStyle())
	? GrCCPerFlushResourceSpecs::kFillIdx
	: GrCCPerFlushResourceSpecs::kStrokeIdx;
	++specs->fNumCopiedPaths[idx];
	specs->fCopyPathStats[idx].statPath(path);
	specs->fCopyAtlasSpecs.accountForSpace(
	draw.fCacheEntry->width(), draw.fCacheEntry->height());
	draw.fDoCopyToA8Coverage = true;
	}
	continue;
	}

	if (Visibility::kMostlyComplete == draw.fMaskVisibility &&
	draw.fCacheEntry->hitCount() > 1) {
	int shapeSize = SkTMax(draw.fShapeConservativeIBounds.height(),
	draw.fShapeConservativeIBounds.width());
	if (shapeSize <= onFlushRP->caps()->maxRenderTargetSize()) {
	// We've seen this path before with a compatible matrix, and it's mostly
	// visible. Just render the whole mask so we can try to cache it.
	draw.fMaskDevIBounds = draw.fShapeConservativeIBounds;
	draw.fMaskVisibility = Visibility::kComplete;
	}
	}
	}

	int idx = (draw.fShape.style().strokeRec().isFillStyle())
	? GrCCPerFlushResourceSpecs::kFillIdx
	: GrCCPerFlushResourceSpecs::kStrokeIdx;
	++specs->fNumRenderedPaths[idx];
	specs->fRenderedPathStats[idx].statPath(path);
	specs->fRenderedAtlasSpecs.accountForSpace(draw.fMaskDevIBounds.width(),
	draw.fMaskDevIBounds.height());
	}
	}

	void GrCCDrawPathsOp::setupResources(
	GrCCPathCache* pathCache, GrOnFlushResourceProvider* onFlushRP,
	GrCCPerFlushResources* resources, DoCopiesToA8Coverage doCopies) {
	using DoEvenOddFill = GrCCPathProcessor::DoEvenOddFill;
	SkASSERT(fNumDraws > 0);
	SkASSERT(-1 == fBaseInstance);
	fBaseInstance = resources->nextPathInstanceIdx();

	for (SingleDraw& draw : fDraws) {
	SkPath path;
	draw.fShape.asPath(&path);

	auto doEvenOddFill = DoEvenOddFill(draw.fShape.style().strokeRec().isFillStyle() &&
	SkPath::kEvenOdd_FillType == path.getFillType());
	SkASSERT(SkPath::kEvenOdd_FillType == path.getFillType() \|\|
	SkPath::kWinding_FillType == path.getFillType());

	if (auto cacheEntry = draw.fCacheEntry.get()) {
	// Does the path already exist in a cached atlas texture?
	if (cacheEntry->cachedAtlas()) {
	SkASSERT(cacheEntry->cachedAtlas()->getOnFlushProxy());
	if (DoCopiesToA8Coverage::kYes == doCopies && draw.fDoCopyToA8Coverage) {
	resources->upgradeEntryToLiteralCoverageAtlas(pathCache, onFlushRP, cacheEntry,
	doEvenOddFill);
	SkASSERT(cacheEntry->cachedAtlas());
	SkASSERT(GrCCAtlas::CoverageType::kA8_LiteralCoverage
	== cacheEntry->cachedAtlas()->coverageType());
	SkASSERT(cacheEntry->cachedAtlas()->getOnFlushProxy());
	}
	this->recordInstance(cacheEntry->cachedAtlas()->getOnFlushProxy(),
	resources->nextPathInstanceIdx());
	// TODO4F: Preserve float colors
	resources->appendDrawPathInstance().set(*cacheEntry, draw.fCachedMaskShift,
	draw.fColor.toBytes_RGBA());
	continue;
	}
	}

	// Render the raw path into a coverage count atlas. renderShapeInAtlas() gives us two tight
	// bounding boxes: One in device space, as well as a second one rotated an additional 45
	// degrees. The path vertex shader uses these two bounding boxes to generate an octagon that
	// circumscribes the path.
	SkRect devBounds, devBounds45;
	SkIRect devIBounds;
	SkIVector devToAtlasOffset;
	if (auto atlas = resources->renderShapeInAtlas(
	draw.fMaskDevIBounds, draw.fMatrix, draw.fShape, draw.fStrokeDevWidth,
	&devBounds, &devBounds45, &devIBounds, &devToAtlasOffset)) {
	this->recordInstance(atlas->textureProxy(), resources->nextPathInstanceIdx());
	// TODO4F: Preserve float colors
	resources->appendDrawPathInstance().set(devBounds, devBounds45, devToAtlasOffset,
	draw.fColor.toBytes_RGBA(), doEvenOddFill);

	// If we have a spot in the path cache, try to make a note of where this mask is so we
	// can reuse it in the future.
	if (auto cacheEntry = draw.fCacheEntry.get()) {
	SkASSERT(!cacheEntry->cachedAtlas());

	if (Visibility::kComplete != draw.fMaskVisibility \|\| cacheEntry->hitCount() <= 1) {
	// Don't cache a path mask unless it's completely visible with a hit count > 1.
	//
	// NOTE: mostly-visible paths with a hit count > 1 should have been promoted to
	// fully visible during accountForOwnPaths().
	continue;
	}

	cacheEntry->setCoverageCountAtlas(onFlushRP, atlas, devToAtlasOffset, devBounds,
	devBounds45, devIBounds, draw.fCachedMaskShift);
	}
	}
	}

	if (!fInstanceRanges.empty()) {
	fInstanceRanges.back().fEndInstanceIdx = resources->nextPathInstanceIdx();
	}
	}

	inline void GrCCDrawPathsOp::recordInstance(GrTextureProxy* atlasProxy, int instanceIdx) {
	if (fInstanceRanges.empty()) {
	fInstanceRanges.push_back({atlasProxy, instanceIdx});
	return;
	}
	if (fInstanceRanges.back().fAtlasProxy != atlasProxy) {
	fInstanceRanges.back().fEndInstanceIdx = instanceIdx;
	fInstanceRanges.push_back({atlasProxy, instanceIdx});
	return;
	}
	}

	void GrCCDrawPathsOp::onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) {
	SkASSERT(fOwningPerOpListPaths);

	const GrCCPerFlushResources* resources = fOwningPerOpListPaths->fFlushResources.get();
	if (!resources) {
	return; // Setup failed.
	}

	GrPipeline::InitArgs initArgs;
	initArgs.fProxy = flushState->drawOpArgs().fProxy;
	initArgs.fCaps = &flushState->caps();
	initArgs.fResourceProvider = flushState->resourceProvider();
	initArgs.fDstProxy = flushState->drawOpArgs().fDstProxy;
	auto clip = flushState->detachAppliedClip();
	GrPipeline::FixedDynamicState fixedDynamicState(clip.scissorState().rect());
	GrPipeline pipeline(initArgs, std::move(fProcessors), std::move(clip));

	int baseInstance = fBaseInstance;
	SkASSERT(baseInstance >= 0); // Make sure setupResources() has been called.

	for (const InstanceRange& range : fInstanceRanges) {
	SkASSERT(range.fEndInstanceIdx > baseInstance);

	GrCCPathProcessor pathProc(range.fAtlasProxy, fViewMatrixIfUsingLocalCoords);
	GrTextureProxy* atlasProxy = range.fAtlasProxy;
	fixedDynamicState.fPrimitiveProcessorTextures = &atlasProxy;
	pathProc.drawPaths(flushState, pipeline, &fixedDynamicState, *resources, baseInstance,
	range.fEndInstanceIdx, this->bounds());

	baseInstance = range.fEndInstanceIdx;
	}
	}