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 SkWriteBuffer_DEFINED 9 #define SkWriteBuffer_DEFINED 10 11 #include "include/core/SkData.h" 12 #include "include/core/SkFlattenable.h" 13 #include "include/core/SkSerialProcs.h" 14 #include "include/private/SkTHash.h" 15 #include "src/core/SkWriter32.h" 16 17 class SkFactorySet; 18 class SkImage; 19 class SkM44; 20 class SkPath; 21 class SkRefCntSet; 22 23 class SkWriteBuffer { 24 public: SkWriteBuffer()25 SkWriteBuffer() {} ~SkWriteBuffer()26 virtual ~SkWriteBuffer() {} 27 28 virtual void writePad32(const void* buffer, size_t bytes) = 0; 29 30 virtual void writeByteArray(const void* data, size_t size) = 0; writeDataAsByteArray(SkData * data)31 void writeDataAsByteArray(SkData* data) { 32 if (!data) { 33 this->write32(0); 34 } else { 35 this->writeByteArray(data->data(), data->size()); 36 } 37 } 38 39 virtual void writeBool(bool value) = 0; 40 virtual void writeScalar(SkScalar value) = 0; 41 virtual void writeScalarArray(const SkScalar* value, uint32_t count) = 0; 42 virtual void writeInt(int32_t value) = 0; 43 virtual void writeIntArray(const int32_t* value, uint32_t count) = 0; 44 virtual void writeUInt(uint32_t value) = 0; write32(int32_t value)45 void write32(int32_t value) { 46 this->writeInt(value); 47 } 48 virtual void writeString(const char* value) = 0; 49 50 virtual void writeFlattenable(const SkFlattenable* flattenable) = 0; 51 virtual void writeColor(SkColor color) = 0; 52 virtual void writeColorArray(const SkColor* color, uint32_t count) = 0; 53 virtual void writeColor4f(const SkColor4f& color) = 0; 54 virtual void writeColor4fArray(const SkColor4f* color, uint32_t count) = 0; 55 virtual void writePoint(const SkPoint& point) = 0; 56 virtual void writePointArray(const SkPoint* point, uint32_t count) = 0; 57 virtual void writePoint3(const SkPoint3& point) = 0; 58 virtual void write(const SkM44&) = 0; 59 virtual void writeMatrix(const SkMatrix& matrix) = 0; 60 virtual void writeIRect(const SkIRect& rect) = 0; 61 virtual void writeRect(const SkRect& rect) = 0; 62 virtual void writeRegion(const SkRegion& region) = 0; 63 virtual void writePath(const SkPath& path) = 0; 64 virtual size_t writeStream(SkStream* stream, size_t length) = 0; 65 virtual void writeImage(const SkImage*) = 0; 66 virtual void writeTypeface(SkTypeface* typeface) = 0; 67 virtual void writePaint(const SkPaint& paint) = 0; 68 setSerialProcs(const SkSerialProcs & procs)69 void setSerialProcs(const SkSerialProcs& procs) { fProcs = procs; } 70 71 protected: 72 SkSerialProcs fProcs; 73 74 friend class SkPicturePriv; // fProcs 75 }; 76 77 /** 78 * Concrete implementation that serializes to a flat binary blob. 79 */ 80 class SkBinaryWriteBuffer : public SkWriteBuffer { 81 public: 82 SkBinaryWriteBuffer(); 83 SkBinaryWriteBuffer(void* initialStorage, size_t storageSize); 84 ~SkBinaryWriteBuffer() override; 85 write(const void * buffer,size_t bytes)86 void write(const void* buffer, size_t bytes) { 87 fWriter.write(buffer, bytes); 88 } writePad32(const void * buffer,size_t bytes)89 void writePad32(const void* buffer, size_t bytes) override { 90 fWriter.writePad(buffer, bytes); 91 } 92 93 void reset(void* storage = nullptr, size_t storageSize = 0) { 94 fWriter.reset(storage, storageSize); 95 } 96 bytesWritten()97 size_t bytesWritten() const { return fWriter.bytesWritten(); } 98 99 // Returns true iff all of the bytes written so far are stored in the initial storage 100 // buffer provided in the constructor or the most recent call to reset. 101 bool usingInitialStorage() const; 102 103 void writeByteArray(const void* data, size_t size) override; 104 void writeBool(bool value) override; 105 void writeScalar(SkScalar value) override; 106 void writeScalarArray(const SkScalar* value, uint32_t count) override; 107 void writeInt(int32_t value) override; 108 void writeIntArray(const int32_t* value, uint32_t count) override; 109 void writeUInt(uint32_t value) override; 110 void writeString(const char* value) override; 111 112 void writeFlattenable(const SkFlattenable* flattenable) override; 113 void writeColor(SkColor color) override; 114 void writeColorArray(const SkColor* color, uint32_t count) override; 115 void writeColor4f(const SkColor4f& color) override; 116 void writeColor4fArray(const SkColor4f* color, uint32_t count) override; 117 void writePoint(const SkPoint& point) override; 118 void writePointArray(const SkPoint* point, uint32_t count) override; 119 void writePoint3(const SkPoint3& point) override; 120 void write(const SkM44&) override; 121 void writeMatrix(const SkMatrix& matrix) override; 122 void writeIRect(const SkIRect& rect) override; 123 void writeRect(const SkRect& rect) override; 124 void writeRegion(const SkRegion& region) override; 125 void writePath(const SkPath& path) override; 126 size_t writeStream(SkStream* stream, size_t length) override; 127 void writeImage(const SkImage*) override; 128 void writeTypeface(SkTypeface* typeface) override; 129 void writePaint(const SkPaint& paint) override; 130 131 bool writeToStream(SkWStream*) const; writeToMemory(void * dst)132 void writeToMemory(void* dst) const { fWriter.flatten(dst); } snapshotAsData()133 sk_sp<SkData> snapshotAsData() const { return fWriter.snapshotAsData(); } 134 135 void setFactoryRecorder(sk_sp<SkFactorySet>); 136 void setTypefaceRecorder(sk_sp<SkRefCntSet>); 137 138 private: 139 sk_sp<SkFactorySet> fFactorySet; 140 sk_sp<SkRefCntSet> fTFSet; 141 142 SkWriter32 fWriter; 143 144 // Only used if we do not have an fFactorySet 145 SkTHashMap<const char*, uint32_t> fFlattenableDict; 146 }; 147 148 enum SkWriteBufferImageFlags { 149 kVersion_bits = 8, 150 kCurrVersion = 0, 151 152 kHasSubsetRect = 1 << 8, 153 kHasMipmap = 1 << 9, 154 }; 155 156 157 #endif // SkWriteBuffer_DEFINED 158