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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 "GrAtlas.h"
#include "GrPathRenderer.h"
#include "GrRect.h"
#include "SkChecksum.h"
#include "SkTDynamicHash.h"
class GrContext;
class GrPlot;
class GrAADistanceFieldPathRenderer : public GrPathRenderer {
public:
GrAADistanceFieldPathRenderer(GrContext* context);
virtual ~GrAADistanceFieldPathRenderer();
virtual bool canDrawPath(const GrDrawTarget*,
const GrDrawState*,
const SkMatrix& viewMatrix,
const SkPath&,
const SkStrokeRec&,
bool antiAlias) const SK_OVERRIDE;
protected:
virtual StencilSupport onGetStencilSupport(const GrDrawTarget*,
const GrDrawState*,
const SkPath&,
const SkStrokeRec&) const SK_OVERRIDE;
virtual bool onDrawPath(GrDrawTarget*,
GrDrawState*,
GrColor,
const SkMatrix& viewMatrix,
const SkPath&,
const SkStrokeRec&,
bool antiAlias) SK_OVERRIDE;
private:
struct PathData {
struct Key {
uint32_t fGenID;
// rendered size for stored path (32x32 max, 64x64 max, 128x128 max)
uint32_t fDimension;
bool operator==(const Key& other) const {
return other.fGenID == fGenID && other.fDimension == fDimension;
}
};
Key fKey;
SkScalar fScale;
GrPlot* fPlot;
SkRect fBounds;
SkIPoint16 fAtlasLocation;
SK_DECLARE_INTERNAL_LLIST_INTERFACE(PathData);
static inline const Key& GetKey(const PathData& data) {
return data.fKey;
}
static inline uint32_t Hash(Key key) {
return SkChecksum::Murmur3(reinterpret_cast<const uint32_t*>(&key), sizeof(key));
}
};
typedef SkTInternalLList<PathData> PathDataList;
GrContext* fContext;
GrAtlas* fAtlas;
SkAutoTUnref<GrGeometryProcessor> fCachedGeometryProcessor;
// current set of flags used to create the cached geometry processor
uint32_t fEffectFlags;
GrAtlas::ClientPlotUsage fPlotUsage;
SkTDynamicHash<PathData, PathData::Key> fPathCache;
PathDataList fPathList;
bool internalDrawPath(GrDrawTarget*, GrDrawState*, GrColor, const SkMatrix& viewMatrix,
const SkPath& path, const PathData* pathData);
PathData* addPathToAtlas(const SkPath& path, const SkStrokeRec& stroke, bool antiAlias,
uint32_t dimension, SkScalar scale);
bool freeUnusedPlot();
typedef GrPathRenderer INHERITED;
};
#endif
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