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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 "GrFragmentProcessor.h"
#include "GrScissorState.h"
#include "GrWindowRectsState.h"
#include "SkClipStack.h"
/**
* Produced by GrClip. It provides a set of modifications to the drawing state that are used to
* create the final GrPipeline for a GrOp.
*/
class GrAppliedClip {
public:
GrAppliedClip() = default;
GrAppliedClip(GrAppliedClip&& that) = default;
GrAppliedClip(const GrAppliedClip&) = delete;
const GrScissorState& scissorState() const { return fScissorState; }
const GrWindowRectsState& windowRectsState() const { return fWindowRectsState; }
GrFragmentProcessor* clipCoverageFragmentProcessor() const { return fClipCoverageFP.get(); }
std::unique_ptr<GrFragmentProcessor> detachClipCoverageFragmentProcessor() {
return std::move(fClipCoverageFP);
}
bool hasStencilClip() const { return SkClipStack::kInvalidGenID != fClipStackID; }
/**
* 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 addCoverageFP(std::unique_ptr<GrFragmentProcessor> fp) {
SkASSERT(!fClipCoverageFP);
fClipCoverageFP = std::move(fp);
}
void addStencilClip(uint32_t clipStackID) {
SkASSERT(SkClipStack::kInvalidGenID == fClipStackID);
fClipStackID = clipStackID;
}
bool doesClip() const {
return fScissorState.enabled() || fClipCoverageFP || this->hasStencilClip() ||
fWindowRectsState.enabled();
}
bool operator==(const GrAppliedClip& that) const {
if (fScissorState != that.fScissorState || fClipStackID != that.fClipStackID) {
return false;
}
if (SkToBool(fClipCoverageFP)) {
if (!SkToBool(that.fClipCoverageFP) ||
!that.fClipCoverageFP->isEqual(*fClipCoverageFP)) {
return false;
}
} else if (SkToBool(that.fClipCoverageFP)) {
return false;
}
return fWindowRectsState == that.fWindowRectsState;
}
bool operator!=(const GrAppliedClip& that) const { return !(*this == that); }
private:
GrScissorState fScissorState;
GrWindowRectsState fWindowRectsState;
std::unique_ptr<GrFragmentProcessor> fClipCoverageFP;
uint32_t fClipStackID = SkClipStack::kInvalidGenID;
};
#endif
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