1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkReadBuffer_DEFINED
#define SkReadBuffer_DEFINED
#include "SkBitmapHeap.h"
#include "SkColorFilter.h"
#include "SkData.h"
#include "SkDrawLooper.h"
#include "SkImageFilter.h"
#include "SkMaskFilter.h"
#include "SkPath.h"
#include "SkPathEffect.h"
#include "SkPicture.h"
#include "SkRasterizer.h"
#include "SkReadBuffer.h"
#include "SkReader32.h"
#include "SkRefCnt.h"
#include "SkShader.h"
#include "SkWriteBuffer.h"
#include "SkXfermode.h"
class SkBitmap;
#if defined(SK_DEBUG) && defined(SK_BUILD_FOR_MAC)
#define DEBUG_NON_DETERMINISTIC_ASSERT
#endif
class SkReadBuffer {
public:
SkReadBuffer();
SkReadBuffer(const void* data, size_t size);
SkReadBuffer(SkStream* stream);
virtual ~SkReadBuffer();
enum Version {
/*
kFilterLevelIsEnum_Version = 23,
kGradientFlippedFlag_Version = 24,
kDashWritesPhaseIntervals_Version = 25,
kColorShaderNoBool_Version = 26,
kNoUnitMappers_Version = 27,
kNoMoreBitmapFlatten_Version = 28,
kSimplifyLocalMatrix_Version = 30,
kImageFilterUniqueID_Version = 31,
kRemoveAndroidPaintOpts_Version = 32,
kFlattenCreateProc_Version = 33,
*/
kRemoveColorTableAlpha_Version = 36,
kDropShadowMode_Version = 37,
kPictureImageFilterResolution_Version = 38,
kPictureImageFilterLevel_Version = 39,
kImageFilterNoUniqueID_Version = 40,
kBitmapSourceFilterQuality_Version = 41
};
/**
* Returns true IFF the version is older than the specified version.
*/
bool isVersionLT(Version targetVersion) const {
SkASSERT(targetVersion > 0);
return fVersion > 0 && fVersion < targetVersion;
}
/** This may be called at most once; most clients of SkReadBuffer should not mess with it. */
void setVersion(int version) {
SkASSERT(0 == fVersion || version == fVersion);
fVersion = version;
}
enum Flags {
kCrossProcess_Flag = 1 << 0,
kScalarIsFloat_Flag = 1 << 1,
kPtrIs64Bit_Flag = 1 << 2,
kValidation_Flag = 1 << 3,
};
void setFlags(uint32_t flags) { fFlags = flags; }
uint32_t getFlags() const { return fFlags; }
bool isCrossProcess() const {
return this->isValidating() || SkToBool(fFlags & kCrossProcess_Flag);
}
bool isScalarFloat() const { return SkToBool(fFlags & kScalarIsFloat_Flag); }
bool isPtr64Bit() const { return SkToBool(fFlags & kPtrIs64Bit_Flag); }
bool isValidating() const { return SkToBool(fFlags & kValidation_Flag); }
SkReader32* getReader32() { return &fReader; }
size_t size() { return fReader.size(); }
size_t offset() { return fReader.offset(); }
bool eof() { return fReader.eof(); }
virtual const void* skip(size_t size) { return fReader.skip(size); }
void* readFunctionPtr() { return fReader.readPtr(); }
// primitives
virtual bool readBool();
virtual SkColor readColor();
virtual SkFixed readFixed();
virtual int32_t readInt();
virtual SkScalar readScalar();
virtual uint32_t readUInt();
virtual int32_t read32();
// strings -- the caller is responsible for freeing the string contents
virtual void readString(SkString* string);
virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encoding);
// common data structures
virtual void readPoint(SkPoint* point);
SkPoint readPoint() { SkPoint p; this->readPoint(&p); return p; }
virtual void readMatrix(SkMatrix* matrix);
virtual void readIRect(SkIRect* rect);
virtual void readRect(SkRect* rect);
virtual void readRegion(SkRegion* region);
virtual void readPath(SkPath* path);
void readPaint(SkPaint* paint) { paint->unflatten(*this); }
virtual SkFlattenable* readFlattenable(SkFlattenable::Type);
template <typename T> T* readFlattenable() {
return (T*) this->readFlattenable(T::GetFlattenableType());
}
SkColorFilter* readColorFilter() { return this->readFlattenable<SkColorFilter>(); }
SkDrawLooper* readDrawLooper() { return this->readFlattenable<SkDrawLooper>(); }
SkImageFilter* readImageFilter() { return this->readFlattenable<SkImageFilter>(); }
SkMaskFilter* readMaskFilter() { return this->readFlattenable<SkMaskFilter>(); }
SkPathEffect* readPathEffect() { return this->readFlattenable<SkPathEffect>(); }
SkRasterizer* readRasterizer() { return this->readFlattenable<SkRasterizer>(); }
SkShader* readShader() { return this->readFlattenable<SkShader>(); }
SkXfermode* readXfermode() { return this->readFlattenable<SkXfermode>(); }
/**
* Like readFlattenable() but explicitly just skips the data that was written for the
* flattenable (or the sentinel that there wasn't one).
*/
virtual void skipFlattenable();
// binary data and arrays
virtual bool readByteArray(void* value, size_t size);
virtual bool readColorArray(SkColor* colors, size_t size);
virtual bool readIntArray(int32_t* values, size_t size);
virtual bool readPointArray(SkPoint* points, size_t size);
virtual bool readScalarArray(SkScalar* values, size_t size);
SkData* readByteArrayAsData() {
size_t len = this->getArrayCount();
if (!this->validateAvailable(len)) {
return SkData::NewEmpty();
}
void* buffer = sk_malloc_throw(len);
this->readByteArray(buffer, len);
return SkData::NewFromMalloc(buffer, len);
}
// helpers to get info about arrays and binary data
virtual uint32_t getArrayCount();
/**
* Returns false if the bitmap could not be completely read. In that case, it will be set
* to have width/height, but no pixels.
*/
bool readBitmap(SkBitmap* bitmap);
virtual SkTypeface* readTypeface();
void setBitmapStorage(SkBitmapHeapReader* bitmapStorage) {
SkRefCnt_SafeAssign(fBitmapStorage, bitmapStorage);
}
void setTypefaceArray(SkTypeface* array[], int count) {
fTFArray = array;
fTFCount = count;
}
/**
* Call this with a pre-loaded array of Factories, in the same order as
* were created/written by the writer. SkPicture uses this.
*/
void setFactoryPlayback(SkFlattenable::Factory array[], int count) {
fFactoryTDArray = NULL;
fFactoryArray = array;
fFactoryCount = count;
}
/**
* Call this with an initially empty array, so the reader can cache each
* factory it sees by name. Used by the pipe code in conjunction with
* SkWriteBuffer::setNamedFactoryRecorder.
*/
void setFactoryArray(SkTDArray<SkFlattenable::Factory>* array) {
fFactoryTDArray = array;
fFactoryArray = NULL;
fFactoryCount = 0;
}
/**
* Provide a function to decode an SkBitmap from encoded data. Only used if the writer
* encoded the SkBitmap. If the proper decoder cannot be used, a red bitmap with the
* appropriate size will be used.
*/
void setBitmapDecoder(SkPicture::InstallPixelRefProc bitmapDecoder) {
fBitmapDecoder = bitmapDecoder;
}
// Default impelementations don't check anything.
virtual bool validate(bool isValid) { return true; }
virtual bool isValid() const { return true; }
virtual bool validateAvailable(size_t size) { return true; }
protected:
SkReader32 fReader;
private:
bool readArray(void* value, size_t size, size_t elementSize);
uint32_t fFlags;
int fVersion;
void* fMemoryPtr;
SkBitmapHeapReader* fBitmapStorage;
SkTypeface** fTFArray;
int fTFCount;
SkTDArray<SkFlattenable::Factory>* fFactoryTDArray;
SkFlattenable::Factory* fFactoryArray;
int fFactoryCount;
SkPicture::InstallPixelRefProc fBitmapDecoder;
#ifdef DEBUG_NON_DETERMINISTIC_ASSERT
// Debugging counter to keep track of how many bitmaps we
// have decoded.
int fDecodedBitmapIndex;
#endif // DEBUG_NON_DETERMINISTIC_ASSERT
};
#endif // SkReadBuffer_DEFINED
|
