The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/pdf/SkPDFGraphicState.h
gfx/skia/trunk/src/pdf/SkPDFGraphicState.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:b2c89363a0cf |
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| 1 | |
| 2 /* | |
| 3 * Copyright 2010 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkPDFGraphicState_DEFINED | |
| 11 #define SkPDFGraphicState_DEFINED | |
| 12 | |
| 13 #include "SkPaint.h" | |
| 14 #include "SkPDFTypes.h" | |
| 15 #include "SkTemplates.h" | |
| 16 #include "SkThread.h" | |
| 17 | |
| 18 class SkPDFFormXObject; | |
| 19 | |
| 20 /** \class SkPDFGraphicState | |
| 21 SkPaint objects roughly correspond to graphic state dictionaries that can | |
| 22 be installed. So that a given dictionary is only output to the pdf file | |
| 23 once, we want to canonicalize them. Static methods in this class manage | |
| 24 a weakly referenced set of SkPDFGraphicState objects: when the last | |
| 25 reference to a SkPDFGraphicState is removed, it removes itself from the | |
| 26 static set of objects. | |
| 27 | |
| 28 */ | |
| 29 class SkPDFGraphicState : public SkPDFDict { | |
| 30 SK_DECLARE_INST_COUNT(SkPDFGraphicState) | |
| 31 public: | |
| 32 enum SkPDFSMaskMode { | |
| 33 kAlpha_SMaskMode, | |
| 34 kLuminosity_SMaskMode | |
| 35 }; | |
| 36 | |
| 37 virtual ~SkPDFGraphicState(); | |
| 38 | |
| 39 virtual void getResources(const SkTSet<SkPDFObject*>& knownResourceObjects, | |
| 40 SkTSet<SkPDFObject*>* newResourceObjects); | |
| 41 | |
| 42 // Override emitObject and getOutputSize so that we can populate | |
| 43 // the dictionary on demand. | |
| 44 virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog, | |
| 45 bool indirect); | |
| 46 virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect); | |
| 47 | |
| 48 /** Get the graphic state for the passed SkPaint. The reference count of | |
| 49 * the object is incremented and it is the caller's responsibility to | |
| 50 * unreference it when done. This is needed to accommodate the weak | |
| 51 * reference pattern used when the returned object is new and has no | |
| 52 * other references. | |
| 53 * @param paint The SkPaint to emulate. | |
| 54 */ | |
| 55 static SkPDFGraphicState* GetGraphicStateForPaint(const SkPaint& paint); | |
| 56 | |
| 57 /** Make a graphic state that only sets the passed soft mask. The | |
| 58 * reference count of the object is incremented and it is the caller's | |
| 59 * responsibility to unreference it when done. | |
| 60 * @param sMask The form xobject to use as a soft mask. | |
| 61 * @param invert Indicates if the alpha of the sMask should be inverted. | |
| 62 * @param sMaskMode Whether to use alpha or luminosity for the sMask. | |
| 63 */ | |
| 64 static SkPDFGraphicState* GetSMaskGraphicState(SkPDFFormXObject* sMask, | |
| 65 bool invert, | |
| 66 SkPDFSMaskMode sMaskMode); | |
| 67 | |
| 68 /** Get a graphic state that only unsets the soft mask. The reference | |
| 69 * count of the object is incremented and it is the caller's responsibility | |
| 70 * to unreference it when done. This is needed to accommodate the weak | |
| 71 * reference pattern used when the returned object is new and has no | |
| 72 * other references. | |
| 73 */ | |
| 74 static SkPDFGraphicState* GetNoSMaskGraphicState(); | |
| 75 | |
| 76 private: | |
| 77 const SkPaint fPaint; | |
| 78 SkTDArray<SkPDFObject*> fResources; | |
| 79 bool fPopulated; | |
| 80 bool fSMask; | |
| 81 | |
| 82 class GSCanonicalEntry { | |
| 83 public: | |
| 84 SkPDFGraphicState* fGraphicState; | |
| 85 const SkPaint* fPaint; | |
| 86 | |
| 87 bool operator==(const GSCanonicalEntry& b) const; | |
| 88 explicit GSCanonicalEntry(SkPDFGraphicState* gs) | |
| 89 : fGraphicState(gs), | |
| 90 fPaint(&gs->fPaint) {} | |
| 91 explicit GSCanonicalEntry(const SkPaint* paint) | |
| 92 : fGraphicState(NULL), | |
| 93 fPaint(paint) {} | |
| 94 }; | |
| 95 | |
| 96 // This should be made a hash table if performance is a problem. | |
| 97 static SkTDArray<GSCanonicalEntry>& CanonicalPaints(); | |
| 98 static SkBaseMutex& CanonicalPaintsMutex(); | |
| 99 | |
| 100 SkPDFGraphicState(); | |
| 101 explicit SkPDFGraphicState(const SkPaint& paint); | |
| 102 | |
| 103 void populateDict(); | |
| 104 | |
| 105 static SkPDFObject* GetInvertFunction(); | |
| 106 | |
| 107 static int Find(const SkPaint& paint); | |
| 108 typedef SkPDFDict INHERITED; | |
| 109 }; | |
| 110 | |
| 111 #endif |
