1 /* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkPictureData_DEFINED 9 #define SkPictureData_DEFINED 10 11 #include "SkBitmap.h" 12 #include "SkPicture.h" 13 #include "SkPictureContentInfo.h" 14 #include "SkPictureFlat.h" 15 16 class SkData; 17 class SkPictureRecord; 18 class SkPixelSerializer; 19 class SkReader32; 20 class SkStream; 21 class SkWStream; 22 class SkBBoxHierarchy; 23 class SkMatrix; 24 class SkPaint; 25 class SkPath; 26 class SkReadBuffer; 27 class SkTextBlob; 28 29 struct SkPictInfo { 30 enum Flags { 31 kCrossProcess_Flag = 1 << 0, 32 kScalarIsFloat_Flag = 1 << 1, 33 kPtrIs64Bit_Flag = 1 << 2, 34 }; 35 36 char fMagic[8]; 37 uint32_t fVersion; 38 SkRect fCullRect; 39 uint32_t fFlags; 40 }; 41 42 #define SK_PICT_READER_TAG SkSetFourByteTag('r', 'e', 'a', 'd') 43 #define SK_PICT_FACTORY_TAG SkSetFourByteTag('f', 'a', 'c', 't') 44 #define SK_PICT_TYPEFACE_TAG SkSetFourByteTag('t', 'p', 'f', 'c') 45 #define SK_PICT_PICTURE_TAG SkSetFourByteTag('p', 'c', 't', 'r') 46 47 // This tag specifies the size of the ReadBuffer, needed for the following tags 48 #define SK_PICT_BUFFER_SIZE_TAG SkSetFourByteTag('a', 'r', 'a', 'y') 49 // these are all inside the ARRAYS tag 50 #define SK_PICT_BITMAP_BUFFER_TAG SkSetFourByteTag('b', 't', 'm', 'p') 51 #define SK_PICT_PAINT_BUFFER_TAG SkSetFourByteTag('p', 'n', 't', ' ') 52 #define SK_PICT_PATH_BUFFER_TAG SkSetFourByteTag('p', 't', 'h', ' ') 53 #define SK_PICT_TEXTBLOB_BUFFER_TAG SkSetFourByteTag('b', 'l', 'o', 'b') 54 55 // Always write this guy last (with no length field afterwards) 56 #define SK_PICT_EOF_TAG SkSetFourByteTag('e', 'o', 'f', ' ') 57 58 class SkPictureData { 59 public: 60 SkPictureData(const SkPictureRecord& record, const SkPictInfo&, bool deepCopyOps); 61 // Does not affect ownership of SkStream. 62 static SkPictureData* CreateFromStream(SkStream*, 63 const SkPictInfo&, 64 SkPicture::InstallPixelRefProc); 65 static SkPictureData* CreateFromBuffer(SkReadBuffer&, const SkPictInfo&); 66 67 virtual ~SkPictureData(); 68 69 void serialize(SkWStream*, SkPixelSerializer*) const; 70 void flatten(SkWriteBuffer&) const; 71 72 bool containsBitmaps() const; 73 hasText()74 bool hasText() const { return fContentInfo.hasText(); } 75 opCount()76 int opCount() const { return fContentInfo.numOperations(); } 77 opData()78 const SkData* opData() const { return fOpData; } 79 80 protected: 81 explicit SkPictureData(const SkPictInfo& info); 82 83 // Does not affect ownership of SkStream. 84 bool parseStream(SkStream*, SkPicture::InstallPixelRefProc); 85 bool parseBuffer(SkReadBuffer& buffer); 86 87 public: getBitmap(SkReader32 * reader)88 const SkBitmap& getBitmap(SkReader32* reader) const { 89 const int index = reader->readInt(); 90 return fBitmaps[index]; 91 } 92 getPath(SkReader32 * reader)93 const SkPath& getPath(SkReader32* reader) const { 94 int index = reader->readInt() - 1; 95 return fPaths[index]; 96 } 97 getPicture(SkReader32 * reader)98 const SkPicture* getPicture(SkReader32* reader) const { 99 int index = reader->readInt(); 100 SkASSERT(index > 0 && index <= fPictureCount); 101 return fPictureRefs[index - 1]; 102 } 103 getPaint(SkReader32 * reader)104 const SkPaint* getPaint(SkReader32* reader) const { 105 int index = reader->readInt(); 106 if (index == 0) { 107 return NULL; 108 } 109 return &fPaints[index - 1]; 110 } 111 getTextBlob(SkReader32 * reader)112 const SkTextBlob* getTextBlob(SkReader32* reader) const { 113 int index = reader->readInt(); 114 SkASSERT(index > 0 && index <= fTextBlobCount); 115 return fTextBlobRefs[index - 1]; 116 } 117 118 #if SK_SUPPORT_GPU 119 /** 120 * sampleCount is the number of samples-per-pixel or zero if non-MSAA. 121 * It is defaulted to be zero. 122 */ 123 bool suitableForGpuRasterization(GrContext* context, const char **reason, 124 int sampleCount = 0) const; 125 126 /** 127 * Calls getRecommendedSampleCount with GrPixelConfig and dpi to calculate sampleCount 128 * and then calls the above version of suitableForGpuRasterization 129 */ 130 bool suitableForGpuRasterization(GrContext* context, const char **reason, 131 GrPixelConfig config, SkScalar dpi) const; 132 133 bool suitableForLayerOptimization() const; 134 #endif 135 136 private: 137 void init(); 138 139 // these help us with reading/writing 140 // Does not affect ownership of SkStream. 141 bool parseStreamTag(SkStream*, uint32_t tag, uint32_t size, SkPicture::InstallPixelRefProc); 142 bool parseBufferTag(SkReadBuffer&, uint32_t tag, uint32_t size); 143 void flattenToBuffer(SkWriteBuffer&) const; 144 145 // Only used by getBitmap() if the passed in index is SkBitmapHeap::INVALID_SLOT. This empty 146 // bitmap allows playback to draw nothing and move on. 147 SkBitmap fBadBitmap; 148 149 SkTArray<SkBitmap> fBitmaps; 150 SkTArray<SkPaint> fPaints; 151 SkTArray<SkPath> fPaths; 152 153 SkData* fOpData; // opcodes and parameters 154 155 const SkPicture** fPictureRefs; 156 int fPictureCount; 157 const SkTextBlob** fTextBlobRefs; 158 int fTextBlobCount; 159 160 SkPictureContentInfo fContentInfo; 161 162 SkTypefacePlayback fTFPlayback; 163 SkFactoryPlayback* fFactoryPlayback; 164 165 const SkPictInfo fInfo; 166 167 static void WriteFactories(SkWStream* stream, const SkFactorySet& rec); 168 static void WriteTypefaces(SkWStream* stream, const SkRefCntSet& rec); 169 170 void initForPlayback() const; 171 }; 172 173 #endif 174