| /* | |
| * Copyright 2016 Google Inc. | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "GrReducedClip.h" | |
| #include "GrAppliedClip.h" | |
| #include "GrClip.h" | |
| #include "GrColor.h" | |
| #include "GrContextPriv.h" | |
| #include "GrDrawingManager.h" | |
| #include "GrFixedClip.h" | |
| #include "GrPathRenderer.h" | |
| #include "GrRenderTargetContext.h" | |
| #include "GrRenderTargetContextPriv.h" | |
| #include "GrShape.h" | |
| #include "GrStencilClip.h" | |
| #include "GrStencilSettings.h" | |
| #include "GrStyle.h" | |
| #include "GrUserStencilSettings.h" | |
| #include "SkClipOpPriv.h" | |
| #include "ccpr/GrCoverageCountingPathRenderer.h" | |
| #include "effects/GrAARectEffect.h" | |
| #include "effects/GrConvexPolyEffect.h" | |
| #include "effects/GrRRectEffect.h" | |
| /** | |
| * There are plenty of optimizations that could be added here. Maybe flips could be folded into | |
| * earlier operations. Or would inserting flips and reversing earlier ops ever be a win? Perhaps | |
| * for the case where the bounds are kInsideOut_BoundsType. We could restrict earlier operations | |
| * based on later intersect operations, and perhaps remove intersect-rects. We could optionally | |
| * take a rect in case the caller knows a bound on what is to be drawn through this clip. | |
| */ | |
| GrReducedClip::GrReducedClip(const SkClipStack& stack, const SkRect& queryBounds, | |
| const GrCaps* caps, int maxWindowRectangles, int maxAnalyticFPs, | |
| int maxCCPRClipPaths) | |
| : fCaps(caps) | |
| , fMaxWindowRectangles(maxWindowRectangles) | |
| , fMaxAnalyticFPs(maxAnalyticFPs) | |
| , fMaxCCPRClipPaths(maxCCPRClipPaths) { | |
| SkASSERT(!queryBounds.isEmpty()); | |
| SkASSERT(fMaxWindowRectangles <= GrWindowRectangles::kMaxWindows); | |
| SkASSERT(fMaxCCPRClipPaths <= fMaxAnalyticFPs); | |
| fHasScissor = false; | |
| fAAClipRectGenID = SK_InvalidGenID; | |
| if (stack.isWideOpen()) { | |
| fInitialState = InitialState::kAllIn; | |
| return; | |
| } | |
| SkClipStack::BoundsType stackBoundsType; | |
| SkRect stackBounds; | |
| bool iior; | |
| stack.getBounds(&stackBounds, &stackBoundsType, &iior); | |
| if (GrClip::IsOutsideClip(stackBounds, queryBounds)) { | |
| bool insideOut = SkClipStack::kInsideOut_BoundsType == stackBoundsType; | |
| fInitialState = insideOut ? InitialState::kAllIn : InitialState::kAllOut; | |
| return; | |
| } | |
| if (iior) { | |
| // "Is intersection of rects" means the clip is a single rect indicated by the stack bounds. | |
| // This should only be true if aa/non-aa status matches among all elements. | |
| SkASSERT(SkClipStack::kNormal_BoundsType == stackBoundsType); | |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kTop_IterStart); | |
| if (!iter.prev()->isAA() || GrClip::IsPixelAligned(stackBounds)) { | |
| // The clip is a non-aa rect. Here we just implement the entire thing using fScissor. | |
| stackBounds.round(&fScissor); | |
| fHasScissor = true; | |
| fInitialState = fScissor.isEmpty() ? InitialState::kAllOut : InitialState::kAllIn; | |
| return; | |
| } | |
| if (GrClip::IsInsideClip(stackBounds, queryBounds)) { | |
| fInitialState = InitialState::kAllIn; | |
| return; | |
| } | |
| SkRect tightBounds; | |
| SkAssertResult(tightBounds.intersect(stackBounds, queryBounds)); | |
| fScissor = GrClip::GetPixelIBounds(tightBounds); | |
| if (fScissor.isEmpty()) { | |
| fInitialState = InitialState::kAllOut; | |
| return; | |
| } | |
| fHasScissor = true; | |
| fAAClipRect = stackBounds; | |
| fAAClipRectGenID = stack.getTopmostGenID(); | |
| SkASSERT(SK_InvalidGenID != fAAClipRectGenID); | |
| fInitialState = InitialState::kAllIn; | |
| } else { | |
| SkRect tighterQuery = queryBounds; | |
| if (SkClipStack::kNormal_BoundsType == stackBoundsType) { | |
| // Tighten the query by introducing a new clip at the stack's pixel boundaries. (This | |
| // new clip will be enforced by the scissor.) | |
| SkAssertResult(tighterQuery.intersect(GrClip::GetPixelBounds(stackBounds))); | |
| } | |
| fScissor = GrClip::GetPixelIBounds(tighterQuery); | |
| if (fScissor.isEmpty()) { | |
| fInitialState = InitialState::kAllOut; | |
| return; | |
| } | |
| fHasScissor = true; | |
| // Now that we have determined the bounds to use and filtered out the trivial cases, call | |
| // the helper that actually walks the stack. | |
| this->walkStack(stack, tighterQuery); | |
| } | |
| if (SK_InvalidGenID != fAAClipRectGenID && // Is there an AA clip rect? | |
| ClipResult::kNotClipped == this->addAnalyticFP(fAAClipRect, Invert::kNo, GrAA::kYes)) { | |
| if (fMaskElements.isEmpty()) { | |
| // Use a replace since it is faster than intersect. | |
| fMaskElements.addToHead(fAAClipRect, SkMatrix::I(), kReplace_SkClipOp, true /*doAA*/); | |
| fInitialState = InitialState::kAllOut; | |
| } else { | |
| fMaskElements.addToTail(fAAClipRect, SkMatrix::I(), kIntersect_SkClipOp, true /*doAA*/); | |
| } | |
| fMaskRequiresAA = true; | |
| fMaskGenID = fAAClipRectGenID; | |
| } | |
| } | |
| void GrReducedClip::walkStack(const SkClipStack& stack, const SkRect& queryBounds) { | |
| // walk backwards until we get to: | |
| // a) the beginning | |
| // b) an operation that is known to make the bounds all inside/outside | |
| // c) a replace operation | |
| enum class InitialTriState { | |
| kUnknown = -1, | |
| kAllIn = (int)GrReducedClip::InitialState::kAllIn, | |
| kAllOut = (int)GrReducedClip::InitialState::kAllOut | |
| } initialTriState = InitialTriState::kUnknown; | |
| // During our backwards walk, track whether we've seen ops that either grow or shrink the clip. | |
| // TODO: track these per saved clip so that we can consider them on the forward pass. | |
| bool embiggens = false; | |
| bool emsmallens = false; | |
| // We use a slightly relaxed set of query bounds for element containment tests. This is to | |
| // account for floating point rounding error that may have occurred during coord transforms. | |
| SkRect relaxedQueryBounds = queryBounds.makeInset(GrClip::kBoundsTolerance, | |
| GrClip::kBoundsTolerance); | |
| if (relaxedQueryBounds.isEmpty()) { | |
| relaxedQueryBounds = queryBounds; | |
| } | |
| SkClipStack::Iter iter(stack, SkClipStack::Iter::kTop_IterStart); | |
| int numAAElements = 0; | |
| while (InitialTriState::kUnknown == initialTriState) { | |
| const Element* element = iter.prev(); | |
| if (nullptr == element) { | |
| initialTriState = InitialTriState::kAllIn; | |
| break; | |
| } | |
| if (SkClipStack::kEmptyGenID == element->getGenID()) { | |
| initialTriState = InitialTriState::kAllOut; | |
| break; | |
| } | |
| if (SkClipStack::kWideOpenGenID == element->getGenID()) { | |
| initialTriState = InitialTriState::kAllIn; | |
| break; | |
| } | |
| bool skippable = false; | |
| bool isFlip = false; // does this op just flip the in/out state of every point in the bounds | |
| switch (element->getOp()) { | |
| case kDifference_SkClipOp: | |
| // check if the shape subtracted either contains the entire bounds (and makes | |
| // the clip empty) or is outside the bounds and therefore can be skipped. | |
| if (element->isInverseFilled()) { | |
| if (element->contains(relaxedQueryBounds)) { | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } else if (!embiggens) { | |
| ClipResult result = this->clipInsideElement(element); | |
| if (ClipResult::kMadeEmpty == result) { | |
| return; | |
| } | |
| skippable = (ClipResult::kClipped == result); | |
| } | |
| } else { | |
| if (element->contains(relaxedQueryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| skippable = true; | |
| } else if (!embiggens) { | |
| ClipResult result = this->clipOutsideElement(element); | |
| if (ClipResult::kMadeEmpty == result) { | |
| return; | |
| } | |
| skippable = (ClipResult::kClipped == result); | |
| } | |
| } | |
| if (!skippable) { | |
| emsmallens = true; | |
| } | |
| break; | |
| case kIntersect_SkClipOp: | |
| // check if the shape intersected contains the entire bounds and therefore can | |
| // be skipped or it is outside the entire bounds and therefore makes the clip | |
| // empty. | |
| if (element->isInverseFilled()) { | |
| if (element->contains(relaxedQueryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| skippable = true; | |
| } else if (!embiggens) { | |
| ClipResult result = this->clipOutsideElement(element); | |
| if (ClipResult::kMadeEmpty == result) { | |
| return; | |
| } | |
| skippable = (ClipResult::kClipped == result); | |
| } | |
| } else { | |
| if (element->contains(relaxedQueryBounds)) { | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } else if (!embiggens) { | |
| ClipResult result = this->clipInsideElement(element); | |
| if (ClipResult::kMadeEmpty == result) { | |
| return; | |
| } | |
| skippable = (ClipResult::kClipped == result); | |
| } | |
| } | |
| if (!skippable) { | |
| emsmallens = true; | |
| } | |
| break; | |
| case kUnion_SkClipOp: | |
| // If the union-ed shape contains the entire bounds then after this element | |
| // the bounds is entirely inside the clip. If the union-ed shape is outside the | |
| // bounds then this op can be skipped. | |
| if (element->isInverseFilled()) { | |
| if (element->contains(relaxedQueryBounds)) { | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| initialTriState = InitialTriState::kAllIn; | |
| skippable = true; | |
| } | |
| } else { | |
| if (element->contains(relaxedQueryBounds)) { | |
| initialTriState = InitialTriState::kAllIn; | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| skippable = true; | |
| } | |
| } | |
| if (!skippable) { | |
| embiggens = true; | |
| } | |
| break; | |
| case kXOR_SkClipOp: | |
| // If the bounds is entirely inside the shape being xor-ed then the effect is | |
| // to flip the inside/outside state of every point in the bounds. We may be | |
| // able to take advantage of this in the forward pass. If the xor-ed shape | |
| // doesn't intersect the bounds then it can be skipped. | |
| if (element->isInverseFilled()) { | |
| if (element->contains(relaxedQueryBounds)) { | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| isFlip = true; | |
| } | |
| } else { | |
| if (element->contains(relaxedQueryBounds)) { | |
| isFlip = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| skippable = true; | |
| } | |
| } | |
| if (!skippable) { | |
| emsmallens = embiggens = true; | |
| } | |
| break; | |
| case kReverseDifference_SkClipOp: | |
| // When the bounds is entirely within the rev-diff shape then this behaves like xor | |
| // and reverses every point inside the bounds. If the shape is completely outside | |
| // the bounds then we know after this element is applied that the bounds will be | |
| // all outside the current clip.B | |
| if (element->isInverseFilled()) { | |
| if (element->contains(relaxedQueryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| isFlip = true; | |
| } | |
| } else { | |
| if (element->contains(relaxedQueryBounds)) { | |
| isFlip = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } | |
| } | |
| if (!skippable) { | |
| emsmallens = embiggens = true; | |
| } | |
| break; | |
| case kReplace_SkClipOp: | |
| // Replace will always terminate our walk. We will either begin the forward walk | |
| // at the replace op or detect here than the shape is either completely inside | |
| // or completely outside the bounds. In this latter case it can be skipped by | |
| // setting the correct value for initialTriState. | |
| if (element->isInverseFilled()) { | |
| if (element->contains(relaxedQueryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| initialTriState = InitialTriState::kAllIn; | |
| skippable = true; | |
| } else if (!embiggens) { | |
| ClipResult result = this->clipOutsideElement(element); | |
| if (ClipResult::kMadeEmpty == result) { | |
| return; | |
| } | |
| if (ClipResult::kClipped == result) { | |
| initialTriState = InitialTriState::kAllIn; | |
| skippable = true; | |
| } | |
| } | |
| } else { | |
| if (element->contains(relaxedQueryBounds)) { | |
| initialTriState = InitialTriState::kAllIn; | |
| skippable = true; | |
| } else if (GrClip::IsOutsideClip(element->getBounds(), queryBounds)) { | |
| initialTriState = InitialTriState::kAllOut; | |
| skippable = true; | |
| } else if (!embiggens) { | |
| ClipResult result = this->clipInsideElement(element); | |
| if (ClipResult::kMadeEmpty == result) { | |
| return; | |
| } | |
| if (ClipResult::kClipped == result) { | |
| initialTriState = InitialTriState::kAllIn; | |
| skippable = true; | |
| } | |
| } | |
| } | |
| if (!skippable) { | |
| initialTriState = InitialTriState::kAllOut; | |
| embiggens = emsmallens = true; | |
| } | |
| break; | |
| default: | |
| SkDEBUGFAIL("Unexpected op."); | |
| break; | |
| } | |
| if (!skippable) { | |
| if (fMaskElements.isEmpty()) { | |
| // This will be the last element. Record the stricter genID. | |
| fMaskGenID = element->getGenID(); | |
| } | |
| // if it is a flip, change it to a bounds-filling rect | |
| if (isFlip) { | |
| SkASSERT(kXOR_SkClipOp == element->getOp() || | |
| kReverseDifference_SkClipOp == element->getOp()); | |
| fMaskElements.addToHead(SkRect::Make(fScissor), SkMatrix::I(), | |
| kReverseDifference_SkClipOp, false); | |
| } else { | |
| Element* newElement = fMaskElements.addToHead(*element); | |
| if (newElement->isAA()) { | |
| ++numAAElements; | |
| } | |
| // Intersecting an inverse shape is the same as differencing the non-inverse shape. | |
| // Replacing with an inverse shape is the same as setting initialState=kAllIn and | |
| // differencing the non-inverse shape. | |
| bool isReplace = kReplace_SkClipOp == newElement->getOp(); | |
| if (newElement->isInverseFilled() && | |
| (kIntersect_SkClipOp == newElement->getOp() || isReplace)) { | |
| newElement->invertShapeFillType(); | |
| newElement->setOp(kDifference_SkClipOp); | |
| if (isReplace) { | |
| SkASSERT(InitialTriState::kAllOut == initialTriState); | |
| initialTriState = InitialTriState::kAllIn; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| if ((InitialTriState::kAllOut == initialTriState && !embiggens) || | |
| (InitialTriState::kAllIn == initialTriState && !emsmallens)) { | |
| fMaskElements.reset(); | |
| numAAElements = 0; | |
| } else { | |
| Element* element = fMaskElements.headIter().get(); | |
| while (element) { | |
| bool skippable = false; | |
| switch (element->getOp()) { | |
| case kDifference_SkClipOp: | |
| // subtracting from the empty set yields the empty set. | |
| skippable = InitialTriState::kAllOut == initialTriState; | |
| break; | |
| case kIntersect_SkClipOp: | |
| // intersecting with the empty set yields the empty set | |
| if (InitialTriState::kAllOut == initialTriState) { | |
| skippable = true; | |
| } else { | |
| // We can clear to zero and then simply draw the clip element. | |
| initialTriState = InitialTriState::kAllOut; | |
| element->setOp(kReplace_SkClipOp); | |
| } | |
| break; | |
| case kUnion_SkClipOp: | |
| if (InitialTriState::kAllIn == initialTriState) { | |
| // unioning the infinite plane with anything is a no-op. | |
| skippable = true; | |
| } else { | |
| // unioning the empty set with a shape is the shape. | |
| element->setOp(kReplace_SkClipOp); | |
| } | |
| break; | |
| case kXOR_SkClipOp: | |
| if (InitialTriState::kAllOut == initialTriState) { | |
| // xor could be changed to diff in the kAllIn case, not sure it's a win. | |
| element->setOp(kReplace_SkClipOp); | |
| } | |
| break; | |
| case kReverseDifference_SkClipOp: | |
| if (InitialTriState::kAllIn == initialTriState) { | |
| // subtracting the whole plane will yield the empty set. | |
| skippable = true; | |
| initialTriState = InitialTriState::kAllOut; | |
| } else { | |
| // this picks up flips inserted in the backwards pass. | |
| skippable = element->isInverseFilled() ? | |
| GrClip::IsOutsideClip(element->getBounds(), queryBounds) : | |
| element->contains(relaxedQueryBounds); | |
| if (skippable) { | |
| initialTriState = InitialTriState::kAllIn; | |
| } else { | |
| element->setOp(kReplace_SkClipOp); | |
| } | |
| } | |
| break; | |
| case kReplace_SkClipOp: | |
| skippable = false; // we would have skipped it in the backwards walk if we | |
| // could've. | |
| break; | |
| default: | |
| SkDEBUGFAIL("Unexpected op."); | |
| break; | |
| } | |
| if (!skippable) { | |
| break; | |
| } else { | |
| if (element->isAA()) { | |
| --numAAElements; | |
| } | |
| fMaskElements.popHead(); | |
| element = fMaskElements.headIter().get(); | |
| } | |
| } | |
| } | |
| fMaskRequiresAA = numAAElements > 0; | |
| SkASSERT(InitialTriState::kUnknown != initialTriState); | |
| fInitialState = static_cast<GrReducedClip::InitialState>(initialTriState); | |
| } | |
| GrReducedClip::ClipResult GrReducedClip::clipInsideElement(const Element* element) { | |
| SkIRect elementIBounds; | |
| if (!element->isAA()) { | |
| element->getBounds().round(&elementIBounds); | |
| } else { | |
| elementIBounds = GrClip::GetPixelIBounds(element->getBounds()); | |
| } | |
| SkASSERT(fHasScissor); | |
| if (!fScissor.intersect(elementIBounds)) { | |
| this->makeEmpty(); | |
| return ClipResult::kMadeEmpty; | |
| } | |
| switch (element->getDeviceSpaceType()) { | |
| case Element::DeviceSpaceType::kEmpty: | |
| return ClipResult::kMadeEmpty; | |
| case Element::DeviceSpaceType::kRect: | |
| SkASSERT(element->getBounds() == element->getDeviceSpaceRect()); | |
| SkASSERT(!element->isInverseFilled()); | |
| if (element->isAA()) { | |
| if (SK_InvalidGenID == fAAClipRectGenID) { // No AA clip rect yet? | |
| fAAClipRect = element->getDeviceSpaceRect(); | |
| // fAAClipRectGenID is the value we should use for fMaskGenID if we end up | |
| // moving the AA clip rect into the mask. The mask GenID is simply the topmost | |
| // element's GenID. And since we walk the stack backwards, this means it's just | |
| // the first element we don't skip during our walk. | |
| fAAClipRectGenID = fMaskElements.isEmpty() ? element->getGenID() : fMaskGenID; | |
| SkASSERT(SK_InvalidGenID != fAAClipRectGenID); | |
| } else if (!fAAClipRect.intersect(element->getDeviceSpaceRect())) { | |
| this->makeEmpty(); | |
| return ClipResult::kMadeEmpty; | |
| } | |
| } | |
| return ClipResult::kClipped; | |
| case Element::DeviceSpaceType::kRRect: | |
| SkASSERT(!element->isInverseFilled()); | |
| return this->addAnalyticFP(element->getDeviceSpaceRRect(), Invert::kNo, | |
| GrAA(element->isAA())); | |
| case Element::DeviceSpaceType::kPath: | |
| return this->addAnalyticFP(element->getDeviceSpacePath(), | |
| Invert(element->isInverseFilled()), GrAA(element->isAA())); | |
| } | |
| SK_ABORT("Unexpected DeviceSpaceType"); | |
| return ClipResult::kNotClipped; | |
| } | |
| GrReducedClip::ClipResult GrReducedClip::clipOutsideElement(const Element* element) { | |
| switch (element->getDeviceSpaceType()) { | |
| case Element::DeviceSpaceType::kEmpty: | |
| return ClipResult::kMadeEmpty; | |
| case Element::DeviceSpaceType::kRect: | |
| SkASSERT(!element->isInverseFilled()); | |
| if (fWindowRects.count() < fMaxWindowRectangles) { | |
| // Clip out the inside of every rect. We won't be able to entirely skip the AA ones, | |
| // but it saves processing time. | |
| this->addWindowRectangle(element->getDeviceSpaceRect(), element->isAA()); | |
| if (!element->isAA()) { | |
| return ClipResult::kClipped; | |
| } | |
| } | |
| return this->addAnalyticFP(element->getDeviceSpaceRect(), Invert::kYes, | |
| GrAA(element->isAA())); | |
| case Element::DeviceSpaceType::kRRect: { | |
| SkASSERT(!element->isInverseFilled()); | |
| const SkRRect& clipRRect = element->getDeviceSpaceRRect(); | |
| ClipResult clipResult = this->addAnalyticFP(clipRRect, Invert::kYes, | |
| GrAA(element->isAA())); | |
| if (fWindowRects.count() >= fMaxWindowRectangles) { | |
| return clipResult; | |
| } | |
| // Clip out the interiors of round rects with two window rectangles in the shape of a | |
| // "plus". This doesn't let us skip the clip element, but still saves processing time. | |
| SkVector insetTL = clipRRect.radii(SkRRect::kUpperLeft_Corner); | |
| SkVector insetBR = clipRRect.radii(SkRRect::kLowerRight_Corner); | |
| if (SkRRect::kComplex_Type == clipRRect.getType()) { | |
| const SkVector& insetTR = clipRRect.radii(SkRRect::kUpperRight_Corner); | |
| const SkVector& insetBL = clipRRect.radii(SkRRect::kLowerLeft_Corner); | |
| insetTL.fX = SkTMax(insetTL.x(), insetBL.x()); | |
| insetTL.fY = SkTMax(insetTL.y(), insetTR.y()); | |
| insetBR.fX = SkTMax(insetBR.x(), insetTR.x()); | |
| insetBR.fY = SkTMax(insetBR.y(), insetBL.y()); | |
| } | |
| const SkRect& bounds = clipRRect.getBounds(); | |
| if (insetTL.x() + insetBR.x() >= bounds.width() || | |
| insetTL.y() + insetBR.y() >= bounds.height()) { | |
| return clipResult; // The interior "plus" is empty. | |
| } | |
| SkRect horzRect = SkRect::MakeLTRB(bounds.left(), bounds.top() + insetTL.y(), | |
| bounds.right(), bounds.bottom() - insetBR.y()); | |
| this->addWindowRectangle(horzRect, element->isAA()); | |
| if (fWindowRects.count() < fMaxWindowRectangles) { | |
| SkRect vertRect = SkRect::MakeLTRB(bounds.left() + insetTL.x(), bounds.top(), | |
| bounds.right() - insetBR.x(), bounds.bottom()); | |
| this->addWindowRectangle(vertRect, element->isAA()); | |
| } | |
| return clipResult; | |
| } | |
| case Element::DeviceSpaceType::kPath: | |
| return this->addAnalyticFP(element->getDeviceSpacePath(), | |
| Invert(!element->isInverseFilled()), GrAA(element->isAA())); | |
| } | |
| SK_ABORT("Unexpected DeviceSpaceType"); | |
| return ClipResult::kNotClipped; | |
| } | |
| inline void GrReducedClip::addWindowRectangle(const SkRect& elementInteriorRect, bool elementIsAA) { | |
| SkIRect window; | |
| if (!elementIsAA) { | |
| elementInteriorRect.round(&window); | |
| } else { | |
| elementInteriorRect.roundIn(&window); | |
| } | |
| if (!window.isEmpty()) { // Skip very thin windows that round to zero or negative dimensions. | |
| fWindowRects.addWindow(window); | |
| } | |
| } | |
| GrClipEdgeType GrReducedClip::GetClipEdgeType(Invert invert, GrAA aa) { | |
| if (Invert::kNo == invert) { | |
| return (GrAA::kYes == aa) ? GrClipEdgeType::kFillAA : GrClipEdgeType::kFillBW; | |
| } else { | |
| return (GrAA::kYes == aa) ? GrClipEdgeType::kInverseFillAA : GrClipEdgeType::kInverseFillBW; | |
| } | |
| } | |
| GrReducedClip::ClipResult GrReducedClip::addAnalyticFP(const SkRect& deviceSpaceRect, | |
| Invert invert, GrAA aa) { | |
| if (this->numAnalyticFPs() >= fMaxAnalyticFPs) { | |
| return ClipResult::kNotClipped; | |
| } | |
| fAnalyticFPs.push_back(GrAARectEffect::Make(GetClipEdgeType(invert, aa), deviceSpaceRect)); | |
| SkASSERT(fAnalyticFPs.back()); | |
| return ClipResult::kClipped; | |
| } | |
| GrReducedClip::ClipResult GrReducedClip::addAnalyticFP(const SkRRect& deviceSpaceRRect, | |
| Invert invert, GrAA aa) { | |
| if (this->numAnalyticFPs() >= fMaxAnalyticFPs) { | |
| return ClipResult::kNotClipped; | |
| } | |
| if (auto fp = GrRRectEffect::Make(GetClipEdgeType(invert, aa), deviceSpaceRRect, | |
| *fCaps->shaderCaps())) { | |
| fAnalyticFPs.push_back(std::move(fp)); | |
| return ClipResult::kClipped; | |
| } | |
| SkPath deviceSpacePath; | |
| deviceSpacePath.setIsVolatile(true); | |
| deviceSpacePath.addRRect(deviceSpaceRRect); | |
| return this->addAnalyticFP(deviceSpacePath, invert, aa); | |
| } | |
| GrReducedClip::ClipResult GrReducedClip::addAnalyticFP(const SkPath& deviceSpacePath, | |
| Invert invert, GrAA aa) { | |
| if (this->numAnalyticFPs() >= fMaxAnalyticFPs) { | |
| return ClipResult::kNotClipped; | |
| } | |
| if (auto fp = GrConvexPolyEffect::Make(GetClipEdgeType(invert, aa), deviceSpacePath)) { | |
| fAnalyticFPs.push_back(std::move(fp)); | |
| return ClipResult::kClipped; | |
| } | |
| if (fCCPRClipPaths.count() < fMaxCCPRClipPaths && GrAA::kYes == aa) { | |
| // Set aside CCPR paths for later. We will create their clip FPs once we know the ID of the | |
| // opList they will operate in. | |
| SkPath& ccprClipPath = fCCPRClipPaths.push_back(deviceSpacePath); | |
| if (Invert::kYes == invert) { | |
| ccprClipPath.toggleInverseFillType(); | |
| } | |
| return ClipResult::kClipped; | |
| } | |
| return ClipResult::kNotClipped; | |
| } | |
| void GrReducedClip::makeEmpty() { | |
| fHasScissor = false; | |
| fAAClipRectGenID = SK_InvalidGenID; | |
| fWindowRects.reset(); | |
| fMaskElements.reset(); | |
| fInitialState = InitialState::kAllOut; | |
| } | |
| //////////////////////////////////////////////////////////////////////////////// | |
| // Create a 8-bit clip mask in alpha | |
| static bool stencil_element(GrRenderTargetContext* rtc, | |
| const GrFixedClip& clip, | |
| const GrUserStencilSettings* ss, | |
| const SkMatrix& viewMatrix, | |
| const SkClipStack::Element* element) { | |
| GrAA aa = GrAA(element->isAA()); | |
| switch (element->getDeviceSpaceType()) { | |
| case SkClipStack::Element::DeviceSpaceType::kEmpty: | |
| SkDEBUGFAIL("Should never get here with an empty element."); | |
| break; | |
| case SkClipStack::Element::DeviceSpaceType::kRect: | |
| return rtc->priv().drawAndStencilRect(clip, ss, (SkRegion::Op)element->getOp(), | |
| element->isInverseFilled(), aa, viewMatrix, | |
| element->getDeviceSpaceRect()); | |
| break; | |
| default: { | |
| SkPath path; | |
| element->asDeviceSpacePath(&path); | |
| if (path.isInverseFillType()) { | |
| path.toggleInverseFillType(); | |
| } | |
| return rtc->priv().drawAndStencilPath(clip, ss, (SkRegion::Op)element->getOp(), | |
| element->isInverseFilled(), aa, viewMatrix, path); | |
| break; | |
| } | |
| } | |
| return false; | |
| } | |
| static void draw_element(GrRenderTargetContext* rtc, | |
| const GrClip& clip, // TODO: can this just always be WideOpen? | |
| GrPaint&& paint, | |
| GrAA aa, | |
| const SkMatrix& viewMatrix, | |
| const SkClipStack::Element* element) { | |
| // TODO: Draw rrects directly here. | |
| switch (element->getDeviceSpaceType()) { | |
| case SkClipStack::Element::DeviceSpaceType::kEmpty: | |
| SkDEBUGFAIL("Should never get here with an empty element."); | |
| break; | |
| case SkClipStack::Element::DeviceSpaceType::kRect: | |
| rtc->drawRect(clip, std::move(paint), aa, viewMatrix, element->getDeviceSpaceRect()); | |
| break; | |
| default: { | |
| SkPath path; | |
| element->asDeviceSpacePath(&path); | |
| if (path.isInverseFillType()) { | |
| path.toggleInverseFillType(); | |
| } | |
| rtc->drawPath(clip, std::move(paint), aa, viewMatrix, path, GrStyle::SimpleFill()); | |
| break; | |
| } | |
| } | |
| } | |
| bool GrReducedClip::drawAlphaClipMask(GrRenderTargetContext* rtc) const { | |
| // The texture may be larger than necessary, this rect represents the part of the texture | |
| // we populate with a rasterization of the clip. | |
| GrFixedClip clip(SkIRect::MakeWH(fScissor.width(), fScissor.height())); | |
| if (!fWindowRects.empty()) { | |
| clip.setWindowRectangles(fWindowRects.makeOffset(-fScissor.left(), -fScissor.top()), | |
| GrWindowRectsState::Mode::kExclusive); | |
| } | |
| // The scratch texture that we are drawing into can be substantially larger than the mask. Only | |
| // clear the part that we care about. | |
| GrColor initialCoverage = InitialState::kAllIn == this->initialState() ? -1 : 0; | |
| rtc->priv().clear(clip, initialCoverage, GrRenderTargetContext::CanClearFullscreen::kYes); | |
| // Set the matrix so that rendered clip elements are transformed to mask space from clip space. | |
| SkMatrix translate; | |
| translate.setTranslate(SkIntToScalar(-fScissor.left()), SkIntToScalar(-fScissor.top())); | |
| // walk through each clip element and perform its set op | |
| for (ElementList::Iter iter(fMaskElements); iter.get(); iter.next()) { | |
| const Element* element = iter.get(); | |
| SkRegion::Op op = (SkRegion::Op)element->getOp(); | |
| GrAA aa = GrAA(element->isAA()); | |
| bool invert = element->isInverseFilled(); | |
| if (invert || SkRegion::kIntersect_Op == op || SkRegion::kReverseDifference_Op == op) { | |
| // draw directly into the result with the stencil set to make the pixels affected | |
| // by the clip shape be non-zero. | |
| static constexpr GrUserStencilSettings kStencilInElement( | |
| GrUserStencilSettings::StaticInit< | |
| 0xffff, | |
| GrUserStencilTest::kAlways, | |
| 0xffff, | |
| GrUserStencilOp::kReplace, | |
| GrUserStencilOp::kReplace, | |
| 0xffff>() | |
| ); | |
| if (!stencil_element(rtc, clip, &kStencilInElement, translate, element)) { | |
| return false; | |
| } | |
| // Draw to the exterior pixels (those with a zero stencil value). | |
| static constexpr GrUserStencilSettings kDrawOutsideElement( | |
| GrUserStencilSettings::StaticInit< | |
| 0x0000, | |
| GrUserStencilTest::kEqual, | |
| 0xffff, | |
| GrUserStencilOp::kZero, | |
| GrUserStencilOp::kZero, | |
| 0xffff>() | |
| ); | |
| if (!rtc->priv().drawAndStencilRect(clip, &kDrawOutsideElement, op, !invert, GrAA::kNo, | |
| translate, SkRect::Make(fScissor))) { | |
| return false; | |
| } | |
| } else { | |
| // all the remaining ops can just be directly draw into the accumulation buffer | |
| GrPaint paint; | |
| paint.setCoverageSetOpXPFactory(op, false); | |
| draw_element(rtc, clip, std::move(paint), aa, translate, element); | |
| } | |
| } | |
| return true; | |
| } | |
| //////////////////////////////////////////////////////////////////////////////// | |
| // Create a 1-bit clip mask in the stencil buffer. | |
| bool GrReducedClip::drawStencilClipMask(GrContext* context, | |
| GrRenderTargetContext* renderTargetContext) const { | |
| // We set the current clip to the bounds so that our recursive draws are scissored to them. | |
| GrStencilClip stencilClip(fScissor, this->maskGenID()); | |
| if (!fWindowRects.empty()) { | |
| stencilClip.fixedClip().setWindowRectangles(fWindowRects, | |
| GrWindowRectsState::Mode::kExclusive); | |
| } | |
| bool initialState = InitialState::kAllIn == this->initialState(); | |
| renderTargetContext->priv().clearStencilClip(stencilClip.fixedClip(), initialState); | |
| // walk through each clip element and perform its set op with the existing clip. | |
| for (ElementList::Iter iter(fMaskElements); iter.get(); iter.next()) { | |
| const Element* element = iter.get(); | |
| GrAAType aaType = GrAAType::kNone; | |
| if (element->isAA() && GrFSAAType::kNone != renderTargetContext->fsaaType()) { | |
| aaType = GrAAType::kMSAA; | |
| } | |
| bool fillInverted = false; | |
| // This will be used to determine whether the clip shape can be rendered into the | |
| // stencil with arbitrary stencil settings. | |
| GrPathRenderer::StencilSupport stencilSupport; | |
| SkRegion::Op op = (SkRegion::Op)element->getOp(); | |
| GrPathRenderer* pr = nullptr; | |
| SkPath clipPath; | |
| if (Element::DeviceSpaceType::kRect == element->getDeviceSpaceType()) { | |
| stencilSupport = GrPathRenderer::kNoRestriction_StencilSupport; | |
| fillInverted = false; | |
| } else { | |
| element->asDeviceSpacePath(&clipPath); | |
| fillInverted = clipPath.isInverseFillType(); | |
| if (fillInverted) { | |
| clipPath.toggleInverseFillType(); | |
| } | |
| GrShape shape(clipPath, GrStyle::SimpleFill()); | |
| GrPathRenderer::CanDrawPathArgs canDrawArgs; | |
| canDrawArgs.fCaps = context->contextPriv().caps(); | |
| canDrawArgs.fClipConservativeBounds = &stencilClip.fixedClip().scissorRect(); | |
| canDrawArgs.fViewMatrix = &SkMatrix::I(); | |
| canDrawArgs.fShape = &shape; | |
| canDrawArgs.fAAType = aaType; | |
| canDrawArgs.fHasUserStencilSettings = false; | |
| GrDrawingManager* dm = context->contextPriv().drawingManager(); | |
| pr = dm->getPathRenderer(canDrawArgs, false, GrPathRendererChain::DrawType::kStencil, | |
| &stencilSupport); | |
| if (!pr) { | |
| return false; | |
| } | |
| } | |
| bool canRenderDirectToStencil = | |
| GrPathRenderer::kNoRestriction_StencilSupport == stencilSupport; | |
| bool drawDirectToClip; // Given the renderer, the element, | |
| // fill rule, and set operation should | |
| // we render the element directly to | |
| // stencil bit used for clipping. | |
| GrUserStencilSettings const* const* stencilPasses = | |
| GrStencilSettings::GetClipPasses(op, canRenderDirectToStencil, fillInverted, | |
| &drawDirectToClip); | |
| // draw the element to the client stencil bits if necessary | |
| if (!drawDirectToClip) { | |
| static constexpr GrUserStencilSettings kDrawToStencil( | |
| GrUserStencilSettings::StaticInit< | |
| 0x0000, | |
| GrUserStencilTest::kAlways, | |
| 0xffff, | |
| GrUserStencilOp::kIncMaybeClamp, | |
| GrUserStencilOp::kIncMaybeClamp, | |
| 0xffff>() | |
| ); | |
| if (Element::DeviceSpaceType::kRect == element->getDeviceSpaceType()) { | |
| renderTargetContext->priv().stencilRect(stencilClip.fixedClip(), &kDrawToStencil, | |
| aaType, SkMatrix::I(), | |
| element->getDeviceSpaceRect()); | |
| } else { | |
| if (!clipPath.isEmpty()) { | |
| GrShape shape(clipPath, GrStyle::SimpleFill()); | |
| if (canRenderDirectToStencil) { | |
| GrPaint paint; | |
| paint.setXPFactory(GrDisableColorXPFactory::Get()); | |
| GrPathRenderer::DrawPathArgs args{context, | |
| std::move(paint), | |
| &kDrawToStencil, | |
| renderTargetContext, | |
| &stencilClip.fixedClip(), | |
| &stencilClip.fixedClip().scissorRect(), | |
| &SkMatrix::I(), | |
| &shape, | |
| aaType, | |
| false}; | |
| pr->drawPath(args); | |
| } else { | |
| GrPathRenderer::StencilPathArgs args; | |
| args.fContext = context; | |
| args.fRenderTargetContext = renderTargetContext; | |
| args.fClip = &stencilClip.fixedClip(); | |
| args.fClipConservativeBounds = &stencilClip.fixedClip().scissorRect(); | |
| args.fViewMatrix = &SkMatrix::I(); | |
| args.fAAType = aaType; | |
| args.fShape = &shape; | |
| pr->stencilPath(args); | |
| } | |
| } | |
| } | |
| } | |
| // now we modify the clip bit by rendering either the clip | |
| // element directly or a bounding rect of the entire clip. | |
| for (GrUserStencilSettings const* const* pass = stencilPasses; *pass; ++pass) { | |
| if (drawDirectToClip) { | |
| if (Element::DeviceSpaceType::kRect == element->getDeviceSpaceType()) { | |
| renderTargetContext->priv().stencilRect(stencilClip, *pass, aaType, | |
| SkMatrix::I(), | |
| element->getDeviceSpaceRect()); | |
| } else { | |
| GrShape shape(clipPath, GrStyle::SimpleFill()); | |
| GrPaint paint; | |
| paint.setXPFactory(GrDisableColorXPFactory::Get()); | |
| GrPathRenderer::DrawPathArgs args{context, | |
| std::move(paint), | |
| *pass, | |
| renderTargetContext, | |
| &stencilClip, | |
| &stencilClip.fixedClip().scissorRect(), | |
| &SkMatrix::I(), | |
| &shape, | |
| aaType, | |
| false}; | |
| pr->drawPath(args); | |
| } | |
| } else { | |
| // The view matrix is setup to do clip space -> stencil space translation, so | |
| // draw rect in clip space. | |
| renderTargetContext->priv().stencilRect(stencilClip, *pass, aaType, SkMatrix::I(), | |
| SkRect::Make(fScissor)); | |
| } | |
| } | |
| } | |
| return true; | |
| } | |
| std::unique_ptr<GrFragmentProcessor> GrReducedClip::finishAndDetachAnalyticFPs( | |
| GrCoverageCountingPathRenderer* ccpr, uint32_t opListID, int rtWidth, int rtHeight) { | |
| // Make sure finishAndDetachAnalyticFPs hasn't been called already. | |
| SkDEBUGCODE(for (const auto& fp : fAnalyticFPs) { SkASSERT(fp); }) | |
| if (!fCCPRClipPaths.empty()) { | |
| fAnalyticFPs.reserve(fAnalyticFPs.count() + fCCPRClipPaths.count()); | |
| for (const SkPath& ccprClipPath : fCCPRClipPaths) { | |
| SkASSERT(ccpr); | |
| SkASSERT(fHasScissor); | |
| auto fp = ccpr->makeClipProcessor(opListID, ccprClipPath, fScissor, rtWidth, rtHeight, | |
| *fCaps); | |
| fAnalyticFPs.push_back(std::move(fp)); | |
| } | |
| fCCPRClipPaths.reset(); | |
| } | |
| return GrFragmentProcessor::RunInSeries(fAnalyticFPs.begin(), fAnalyticFPs.count()); | |
| } |