blob: 8004b0eb91a9a6e629bc85e6ca5fca44d3e867e2 [file] [log] [blame]
/*
* 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:
static const GrAppliedHardClip& Disabled() {
// The size doesn't really matter here since it's returned as const& so an actual scissor
// will never be set on it, and applied clips are not used to query or bounds test like
// the GrClip is.
static const GrAppliedHardClip kDisabled({1 << 29, 1 << 29});
return kDisabled;
}
GrAppliedHardClip(const SkISize& rtDims) : fScissorState(rtDims) {}
GrAppliedHardClip(const SkISize& logicalRTDims, const SkISize& backingStoreDims)
: fScissorState(backingStoreDims) {
fScissorState.set(SkIRect::MakeSize(logicalRTDims));
}
GrAppliedHardClip(GrAppliedHardClip&& that) = default;
explicit GrAppliedHardClip(const GrAppliedHardClip&) = default;
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 setScissor(const SkIRect& irect) {
fScissorState.set(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:
static GrAppliedClip Disabled() {
return GrAppliedClip({1 << 29, 1 << 29});
}
GrAppliedClip(const SkISize& rtDims) : fHardClip(rtDims) {}
GrAppliedClip(const SkISize& logicalRTDims, const SkISize& backingStoreDims)
: fHardClip(logicalRTDims, backingStoreDims) {}
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 hasCoverageFragmentProcessor() const { return fCoverageFP != nullptr; }
const GrFragmentProcessor* coverageFragmentProcessor() const {
SkASSERT(fCoverageFP != nullptr);
return fCoverageFP.get();
}
std::unique_ptr<GrFragmentProcessor> detachCoverageFragmentProcessor() {
SkASSERT(fCoverageFP != nullptr);
return std::move(fCoverageFP);
}
const GrAppliedHardClip& hardClip() const { return fHardClip; }
GrAppliedHardClip& hardClip() { return fHardClip; }
void addCoverageFP(std::unique_ptr<GrFragmentProcessor> fp) {
if (fCoverageFP == nullptr) {
fCoverageFP = std::move(fp);
} else {
// Compose this coverage FP with the previously-added coverage.
fCoverageFP = GrFragmentProcessor::Compose(std::move(fp), std::move(fCoverageFP));
}
}
bool doesClip() const {
return fHardClip.doesClip() || fCoverageFP != nullptr;
}
bool operator==(const GrAppliedClip& that) const {
if (fHardClip != that.fHardClip ||
this->hasCoverageFragmentProcessor() != that.hasCoverageFragmentProcessor()) {
return false;
}
if (fCoverageFP != nullptr && !fCoverageFP->isEqual(*that.fCoverageFP)) {
return false;
}
return true;
}
bool operator!=(const GrAppliedClip& that) const { return !(*this == that); }
void visitProxies(const GrVisitProxyFunc& func) const {
if (fCoverageFP != nullptr) {
fCoverageFP->visitProxies(func);
}
}
private:
GrAppliedHardClip fHardClip;
std::unique_ptr<GrFragmentProcessor> fCoverageFP;
};
#endif