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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkColorPriv.h" | 8 #include "SkColorPriv.h" |
9 #include "SkImageDecoder.h" | 9 #include "SkImageDecoder.h" |
10 #include "SkStream.h" | 10 #include "SkStream.h" |
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145 | 145 |
146 //skip ahead to the correct header | 146 //skip ahead to the correct header |
147 //commented out lines are not used, but if i switch to other read method, ne
ed to know how many to skip | 147 //commented out lines are not used, but if i switch to other read method, ne
ed to know how many to skip |
148 //otherwise, they could be used for error checking | 148 //otherwise, they could be used for error checking |
149 int w = readByte(buf, 6 + choice*16); | 149 int w = readByte(buf, 6 + choice*16); |
150 int h = readByte(buf, 7 + choice*16); | 150 int h = readByte(buf, 7 + choice*16); |
151 int colorCount = readByte(buf, 8 + choice*16); | 151 int colorCount = readByte(buf, 8 + choice*16); |
152 //int reservedToo = readByte(buf, 9 + choice*16); //0 | 152 //int reservedToo = readByte(buf, 9 + choice*16); //0 |
153 //int planes = read2Bytes(buf, 10 + choice*16); //1 - but often 0 | 153 //int planes = read2Bytes(buf, 10 + choice*16); //1 - but often 0 |
154 //int fakeBitCount = read2Bytes(buf, 12 + choice*16); //should be real - usu
ally 0 | 154 //int fakeBitCount = read2Bytes(buf, 12 + choice*16); //should be real - usu
ally 0 |
155 int size = read4Bytes(buf, 14 + choice*16); //matters? | 155 const size_t size = read4Bytes(buf, 14 + choice*16); //matters? |
156 int offset = read4Bytes(buf, 18 + choice*16); | 156 const size_t offset = read4Bytes(buf, 18 + choice*16); |
157 if ((size_t)(offset + size) > length) | 157 if ((offset + size) > length) { |
158 return false; | 158 return false; |
| 159 } |
159 | 160 |
160 // Check to see if this is a PNG image inside the ICO | 161 // Check to see if this is a PNG image inside the ICO |
161 { | 162 { |
162 SkMemoryStream subStream(buf + offset, size, false); | 163 SkMemoryStream subStream(buf + offset, size, false); |
163 SkAutoTDelete<SkImageDecoder> otherDecoder(SkImageDecoder::Factory(&subS
tream)); | 164 SkAutoTDelete<SkImageDecoder> otherDecoder(SkImageDecoder::Factory(&subS
tream)); |
164 if (otherDecoder.get() != NULL) { | 165 if (otherDecoder.get() != NULL) { |
165 // Set fields on the other decoder to be the same as this one. | 166 // Set fields on the other decoder to be the same as this one. |
166 this->copyFieldsToOther(otherDecoder.get()); | 167 this->copyFieldsToOther(otherDecoder.get()); |
167 if(otherDecoder->decode(&subStream, bm, this->getDefaultPref(), mode
)) { | 168 if(otherDecoder->decode(&subStream, bm, this->getDefaultPref(), mode
)) { |
168 return true; | 169 return true; |
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412 static SkImageDecoder_DecodeReg gReg(sk_libico_dfactory); | 413 static SkImageDecoder_DecodeReg gReg(sk_libico_dfactory); |
413 | 414 |
414 static SkImageDecoder::Format get_format_ico(SkStreamRewindable* stream) { | 415 static SkImageDecoder::Format get_format_ico(SkStreamRewindable* stream) { |
415 if (is_ico(stream)) { | 416 if (is_ico(stream)) { |
416 return SkImageDecoder::kICO_Format; | 417 return SkImageDecoder::kICO_Format; |
417 } | 418 } |
418 return SkImageDecoder::kUnknown_Format; | 419 return SkImageDecoder::kUnknown_Format; |
419 } | 420 } |
420 | 421 |
421 static SkImageDecoder_FormatReg gFormatReg(get_format_ico); | 422 static SkImageDecoder_FormatReg gFormatReg(get_format_ico); |
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