| |
| /* |
| * 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" |
| #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 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*, |
| 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*, 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 |