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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrAADistanceFieldPathRenderer_DEFINED
#define GrAADistanceFieldPathRenderer_DEFINED
#include "GrAllocPool.h"
#include "GrAtlas.h"
#include "GrPathRenderer.h"
#include "GrRect.h"
#include "SkChecksum.h"
class GrContext;
class GrPlot;
class GrAADistanceFieldPathRenderer : public GrPathRenderer {
public:
GrAADistanceFieldPathRenderer(GrContext* context)
: fContext(context)
, fAtlas(NULL) {
}
virtual ~GrAADistanceFieldPathRenderer();
virtual bool canDrawPath(const SkPath& path,
const SkStrokeRec& stroke,
const GrDrawTarget* target,
bool antiAlias) const SK_OVERRIDE;
protected:
virtual StencilSupport onGetStencilSupport(const SkPath&,
const SkStrokeRec&,
const GrDrawTarget*) const SK_OVERRIDE;
virtual bool onDrawPath(const SkPath& path,
const SkStrokeRec& stroke,
GrDrawTarget* target,
bool antiAlias) SK_OVERRIDE;
private:
struct PathData {
uint32_t fGenID;
GrPlot* fPlot;
SkRect fBounds;
SkIPoint16 fAtlasLocation;
SK_DECLARE_INTERNAL_LLIST_INTERFACE(PathData);
static inline const uint32_t& GetKey(const PathData& data) {
return data.fGenID;
}
static inline uint32_t Hash(uint32_t key) {
return SkChecksum::Murmur3(&key, sizeof(key));
}
};
typedef SkTInternalLList<PathData> PathDataList;
GrContext* fContext;
GrAtlas* fAtlas;
GrAtlas::ClientPlotUsage fPlotUsage;
SkTDynamicHash<PathData, uint32_t> fPathCache;
PathDataList fPathList;
bool internalDrawPath(const SkPath& path, const PathData* pathData, GrDrawTarget* target);
PathData* addPathToAtlas(const SkPath& path, const SkStrokeRec& stroke, bool antiAlias);
bool freeUnusedPlot();
typedef GrPathRenderer INHERITED;
};
#endif
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