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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"
/**
* 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 SkNoncopyable {
public:
GrAppliedClip(const SkRect& drawBounds)
: fHasStencilClip(false)
, fClippedDrawBounds(drawBounds) {
}
const GrScissorState& scissorState() const { return fScissorState; }
const GrWindowRectsState& windowRectsState() const { return fWindowRectsState; }
GrFragmentProcessor* clipCoverageFragmentProcessor() const { return fClipCoverageFP.get(); }
bool hasStencilClip() const { return fHasStencilClip; }
/**
* Intersects the applied clip with the provided rect. Returns false if the draw became empty.
*/
bool addScissor(const SkIRect& irect) {
return fScissorState.intersect(irect) && fClippedDrawBounds.intersect(SkRect::Make(irect));
}
void addWindowRectangles(const GrWindowRectsState& windowState) {
SkASSERT(!fWindowRectsState.enabled());
fWindowRectsState = windowState;
}
void addWindowRectangles(const GrWindowRectangles& windows, const SkIPoint& origin,
GrWindowRectsState::Mode mode) {
SkASSERT(!fWindowRectsState.enabled());
fWindowRectsState.set(windows, origin, mode);
}
void addCoverageFP(sk_sp<GrFragmentProcessor> fp) {
SkASSERT(!fClipCoverageFP);
fClipCoverageFP = fp;
}
void addStencilClip() {
SkASSERT(!fHasStencilClip);
fHasStencilClip = true;
}
/**
* Returns the device bounds of the draw after clip has been applied. TODO: Ideally this would
* consider the combined effect of all clipping techniques in play (scissor, stencil, fp, etc.).
*/
const SkRect& clippedDrawBounds() const { return fClippedDrawBounds; }
private:
GrScissorState fScissorState;
GrWindowRectsState fWindowRectsState;
sk_sp<GrFragmentProcessor> fClipCoverageFP;
bool fHasStencilClip;
SkRect fClippedDrawBounds;
typedef SkNoncopyable INHERITED;
};
#endif
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