djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame^] | 3 | * Copyright 2012 Google Inc. |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 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 | #include "SkOrderedReadBuffer.h" |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame^] | 10 | #include "SkStream.h" |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 11 | #include "SkTypeface.h" |
| 12 | |
| 13 | |
robertphillips@google.com | 4bdfb8c | 2012-06-12 21:23:49 +0000 | [diff] [blame] | 14 | SkOrderedReadBuffer::SkOrderedReadBuffer(const void* data, size_t size) { |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 15 | fReader.setMemory(data, size); |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame^] | 16 | fMemoryPtr = NULL; |
| 17 | |
| 18 | fRCArray = NULL; |
| 19 | fRCCount = 0; |
| 20 | |
| 21 | fTFArray = NULL; |
| 22 | fTFCount = 0; |
| 23 | |
| 24 | fFactoryTDArray = NULL; |
| 25 | fFactoryArray = NULL; |
| 26 | fFactoryCount = 0; |
| 27 | } |
| 28 | |
| 29 | SkOrderedReadBuffer::SkOrderedReadBuffer(SkStream* stream) { |
| 30 | const size_t length = stream->getLength(); |
| 31 | fMemoryPtr = sk_malloc_throw(length); |
| 32 | stream->read(fMemoryPtr, length); |
| 33 | fReader.setMemory(fMemoryPtr, length); |
| 34 | } |
| 35 | |
| 36 | SkOrderedReadBuffer::~SkOrderedReadBuffer() { |
| 37 | sk_free(fMemoryPtr); |
| 38 | } |
| 39 | |
| 40 | bool SkOrderedReadBuffer::readBool() { |
| 41 | return fReader.readBool(); |
| 42 | } |
| 43 | |
| 44 | SkColor SkOrderedReadBuffer::readColor() { |
| 45 | return fReader.readInt(); |
| 46 | } |
| 47 | |
| 48 | SkFixed SkOrderedReadBuffer::readFixed() { |
| 49 | return fReader.readS32(); |
| 50 | } |
| 51 | |
| 52 | int32_t SkOrderedReadBuffer::readInt() { |
| 53 | return fReader.readInt(); |
| 54 | } |
| 55 | |
| 56 | SkScalar SkOrderedReadBuffer::readScalar() { |
| 57 | return fReader.readScalar(); |
| 58 | } |
| 59 | |
| 60 | uint32_t SkOrderedReadBuffer::readUInt() { |
| 61 | return fReader.readU32(); |
| 62 | } |
| 63 | |
| 64 | int32_t SkOrderedReadBuffer::read32() { |
| 65 | return fReader.readInt(); |
| 66 | } |
| 67 | |
| 68 | char* SkOrderedReadBuffer::readString() { |
| 69 | const char* string = fReader.readString(); |
| 70 | const int32_t length = strlen(string); |
| 71 | char* value = (char*)sk_malloc_throw(length + 1); |
| 72 | strcpy(value, string); |
| 73 | return value; |
| 74 | } |
| 75 | |
| 76 | void* SkOrderedReadBuffer::readEncodedString(size_t* length, SkPaint::TextEncoding encoding) { |
| 77 | int32_t encodingType = fReader.readInt(); |
| 78 | SkASSERT(encodingType == encoding); |
| 79 | *length = fReader.readInt(); |
| 80 | void* data = sk_malloc_throw(*length); |
| 81 | memcpy(data, fReader.skip(SkAlign4(*length)), *length); |
| 82 | return data; |
| 83 | } |
| 84 | |
| 85 | void SkOrderedReadBuffer::readPoint(SkPoint* point) { |
| 86 | point->fX = fReader.readScalar(); |
| 87 | point->fY = fReader.readScalar(); |
| 88 | } |
| 89 | |
| 90 | void SkOrderedReadBuffer::readMatrix(SkMatrix* matrix) { |
| 91 | fReader.readMatrix(matrix); |
| 92 | } |
| 93 | |
| 94 | void SkOrderedReadBuffer::readIRect(SkIRect* rect) { |
| 95 | memcpy(rect, fReader.skip(sizeof(SkIRect)), sizeof(SkIRect)); |
| 96 | } |
| 97 | |
| 98 | void SkOrderedReadBuffer::readRect(SkRect* rect) { |
| 99 | memcpy(rect, fReader.skip(sizeof(SkRect)), sizeof(SkRect)); |
| 100 | } |
| 101 | |
| 102 | void SkOrderedReadBuffer::readRegion(SkRegion* region) { |
| 103 | fReader.readRegion(region); |
| 104 | } |
| 105 | |
| 106 | void SkOrderedReadBuffer::readPath(SkPath* path) { |
| 107 | fReader.readPath(path); |
| 108 | } |
| 109 | |
| 110 | uint32_t SkOrderedReadBuffer::readByteArray(void* value) { |
| 111 | const uint32_t length = fReader.readU32(); |
| 112 | memcpy(value, fReader.skip(SkAlign4(length)), length); |
| 113 | return length; |
| 114 | } |
| 115 | |
| 116 | uint32_t SkOrderedReadBuffer::readColorArray(SkColor* colors) { |
| 117 | const uint32_t count = fReader.readU32(); |
| 118 | const uint32_t byteLength = count * sizeof(SkColor); |
| 119 | memcpy(colors, fReader.skip(SkAlign4(byteLength)), byteLength); |
| 120 | return count; |
| 121 | } |
| 122 | |
| 123 | uint32_t SkOrderedReadBuffer::readIntArray(int32_t* values) { |
| 124 | const uint32_t count = fReader.readU32(); |
| 125 | const uint32_t byteLength = count * sizeof(int32_t); |
| 126 | memcpy(values, fReader.skip(SkAlign4(byteLength)), byteLength); |
| 127 | return count; |
| 128 | } |
| 129 | |
| 130 | uint32_t SkOrderedReadBuffer::readPointArray(SkPoint* points) { |
| 131 | const uint32_t count = fReader.readU32(); |
| 132 | const uint32_t byteLength = count * sizeof(SkPoint); |
| 133 | memcpy(points, fReader.skip(SkAlign4(byteLength)), byteLength); |
| 134 | return count; |
| 135 | } |
| 136 | |
| 137 | uint32_t SkOrderedReadBuffer::readScalarArray(SkScalar* values) { |
| 138 | const uint32_t count = fReader.readU32(); |
| 139 | const uint32_t byteLength = count * sizeof(SkScalar); |
| 140 | memcpy(values, fReader.skip(SkAlign4(byteLength)), byteLength); |
| 141 | return count; |
| 142 | } |
| 143 | |
| 144 | uint32_t SkOrderedReadBuffer::getArrayCount() { |
| 145 | return *(uint32_t*)fReader.peek(); |
| 146 | } |
| 147 | |
| 148 | SkRefCnt* SkOrderedReadBuffer::readRefCntPtr() { |
| 149 | if (fRCArray) { |
| 150 | const uint32_t index = fReader.readU32(); |
| 151 | SkASSERT(index <= (unsigned)fRCCount); |
| 152 | return fRCArray[index - 1]; |
| 153 | } else { |
| 154 | return INHERITED::readRefCntPtr(); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | void SkOrderedReadBuffer::readBitmap(SkBitmap* bitmap) { |
| 159 | bitmap->unflatten(*this); |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | SkTypeface* SkOrderedReadBuffer::readTypeface() { |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame^] | 163 | |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 164 | uint32_t index = fReader.readU32(); |
| 165 | if (0 == index || index > (unsigned)fTFCount) { |
| 166 | if (index) { |
| 167 | SkDebugf("====== typeface index %d\n", index); |
| 168 | } |
| 169 | return NULL; |
| 170 | } else { |
| 171 | SkASSERT(fTFArray); |
| 172 | return fTFArray[index - 1]; |
| 173 | } |
| 174 | } |
| 175 | |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 176 | SkFlattenable* SkOrderedReadBuffer::readFlattenable() { |
| 177 | SkFlattenable::Factory factory = NULL; |
| 178 | |
| 179 | if (fFactoryCount > 0) { |
| 180 | int32_t index = fReader.readU32(); |
| 181 | if (0 == index) { |
| 182 | return NULL; // writer failed to give us the flattenable |
| 183 | } |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 184 | index -= 1; // we stored the index-base-1 |
| 185 | SkASSERT(index < fFactoryCount); |
| 186 | factory = fFactoryArray[index]; |
| 187 | } else if (fFactoryTDArray) { |
scroggo@google.com | 0c3e5fe | 2012-08-01 19:34:20 +0000 | [diff] [blame] | 188 | int32_t index = fReader.readU32(); |
| 189 | if (0 == index) { |
| 190 | return NULL; // writer failed to give us the flattenable |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 191 | } |
scroggo@google.com | 0c3e5fe | 2012-08-01 19:34:20 +0000 | [diff] [blame] | 192 | index -= 1; // we stored the index-base-1 |
| 193 | factory = (*fFactoryTDArray)[index]; |
djsollen@google.com | 2b2ede3 | 2012-04-12 13:24:04 +0000 | [diff] [blame] | 194 | } else { |
| 195 | factory = (SkFlattenable::Factory)readFunctionPtr(); |
| 196 | if (NULL == factory) { |
| 197 | return NULL; // writer failed to give us the flattenable |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | // if we get here, factory may still be null, but if that is the case, the |
| 202 | // failure was ours, not the writer. |
| 203 | SkFlattenable* obj = NULL; |
| 204 | uint32_t sizeRecorded = fReader.readU32(); |
| 205 | if (factory) { |
| 206 | uint32_t offset = fReader.offset(); |
| 207 | obj = (*factory)(*this); |
| 208 | // check that we read the amount we expected |
| 209 | uint32_t sizeRead = fReader.offset() - offset; |
| 210 | if (sizeRecorded != sizeRead) { |
| 211 | // we could try to fix up the offset... |
| 212 | sk_throw(); |
| 213 | } |
| 214 | } else { |
| 215 | // we must skip the remaining data |
| 216 | fReader.skip(sizeRecorded); |
| 217 | } |
| 218 | return obj; |
| 219 | } |