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- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef GrAppliedClip_DEFINED
- #define GrAppliedClip_DEFINED
- #include "src/gpu/GrFragmentProcessor.h"
- #include "src/gpu/GrScissorState.h"
- #include "src/gpu/GrWindowRectsState.h"
- #include "src/core/SkClipStack.h"
- /**
- * Produced by GrHardClip. It provides a set of modifications to the hardware drawing state that
- * implement the clip.
- */
- class GrAppliedHardClip {
- public:
- GrAppliedHardClip() = default;
- GrAppliedHardClip(GrAppliedHardClip&& that) = default;
- GrAppliedHardClip(const GrAppliedHardClip&) = delete;
- const GrScissorState& scissorState() const { return fScissorState; }
- const GrWindowRectsState& windowRectsState() const { return fWindowRectsState; }
- uint32_t stencilStackID() const { return fStencilStackID; }
- bool hasStencilClip() const { return SkClipStack::kInvalidGenID != fStencilStackID; }
- /**
- * Intersects the applied clip with the provided rect. Returns false if the draw became empty.
- * 'clippedDrawBounds' will be intersected with 'irect'. This returns false if the clip becomes
- * empty or the draw no longer intersects the clip. In either case the draw can be skipped.
- */
- bool addScissor(const SkIRect& irect, SkRect* clippedDrawBounds) {
- return fScissorState.intersect(irect) && clippedDrawBounds->intersect(SkRect::Make(irect));
- }
- void addWindowRectangles(const GrWindowRectsState& windowState) {
- SkASSERT(!fWindowRectsState.enabled());
- fWindowRectsState = windowState;
- }
- void addWindowRectangles(const GrWindowRectangles& windows, GrWindowRectsState::Mode mode) {
- SkASSERT(!fWindowRectsState.enabled());
- fWindowRectsState.set(windows, mode);
- }
- void addStencilClip(uint32_t stencilStackID) {
- SkASSERT(SkClipStack::kInvalidGenID == fStencilStackID);
- fStencilStackID = stencilStackID;
- }
- bool doesClip() const {
- return fScissorState.enabled() || this->hasStencilClip() || fWindowRectsState.enabled();
- }
- bool operator==(const GrAppliedHardClip& that) const {
- return fScissorState == that.fScissorState &&
- fWindowRectsState == that.fWindowRectsState &&
- fStencilStackID == that.fStencilStackID;
- }
- bool operator!=(const GrAppliedHardClip& that) const { return !(*this == that); }
- private:
- GrScissorState fScissorState;
- GrWindowRectsState fWindowRectsState;
- uint32_t fStencilStackID = SkClipStack::kInvalidGenID;
- };
- /**
- * Produced by GrClip. It provides a set of modifications to GrPipeline that implement the clip.
- */
- class GrAppliedClip {
- public:
- GrAppliedClip() = default;
- GrAppliedClip(GrAppliedClip&& that) = default;
- GrAppliedClip(const GrAppliedClip&) = delete;
- const GrScissorState& scissorState() const { return fHardClip.scissorState(); }
- const GrWindowRectsState& windowRectsState() const { return fHardClip.windowRectsState(); }
- uint32_t stencilStackID() const { return fHardClip.stencilStackID(); }
- bool hasStencilClip() const { return fHardClip.hasStencilClip(); }
- int numClipCoverageFragmentProcessors() const { return fClipCoverageFPs.count(); }
- const GrFragmentProcessor* clipCoverageFragmentProcessor(int i) const {
- SkASSERT(fClipCoverageFPs[i]);
- return fClipCoverageFPs[i].get();
- }
- std::unique_ptr<const GrFragmentProcessor> detachClipCoverageFragmentProcessor(int i) {
- SkASSERT(fClipCoverageFPs[i]);
- return std::move(fClipCoverageFPs[i]);
- }
- GrAppliedHardClip& hardClip() { return fHardClip; }
- void addCoverageFP(std::unique_ptr<GrFragmentProcessor> fp) {
- SkASSERT(fp);
- fClipCoverageFPs.push_back(std::move(fp));
- }
- bool doesClip() const {
- return fHardClip.doesClip() || !fClipCoverageFPs.empty();
- }
- bool operator==(const GrAppliedClip& that) const {
- if (fHardClip != that.fHardClip ||
- fClipCoverageFPs.count() != that.fClipCoverageFPs.count()) {
- return false;
- }
- for (int i = 0; i < fClipCoverageFPs.count(); ++i) {
- if (!fClipCoverageFPs[i] || !that.fClipCoverageFPs[i]) {
- if (fClipCoverageFPs[i] == that.fClipCoverageFPs[i]) {
- continue; // Both are null.
- }
- return false;
- }
- if (!fClipCoverageFPs[i]->isEqual(*that.fClipCoverageFPs[i])) {
- return false;
- }
- }
- return true;
- }
- bool operator!=(const GrAppliedClip& that) const { return !(*this == that); }
- void visitProxies(const GrOp::VisitProxyFunc& func) const {
- for (const std::unique_ptr<GrFragmentProcessor>& fp : fClipCoverageFPs) {
- if (fp) { // This might be called after detach.
- fp->visitProxies(func);
- }
- }
- }
- private:
- GrAppliedHardClip fHardClip;
- SkSTArray<4, std::unique_ptr<GrFragmentProcessor>> fClipCoverageFPs;
- };
- #endif
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