OLD | NEW |
1 /* | 1 /* |
2 * Copyright (c) 2008, 2009, Google Inc. All rights reserved. | 2 * Copyright (c) 2008, 2009, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
(...skipping 13 matching lines...) Expand all Loading... |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #include "config.h" | 31 #include "config.h" |
32 #include "platform/image-decoders/bmp/BMPImageDecoder.h" | 32 #include "platform/image-decoders/bmp/BMPImageDecoder.h" |
33 | 33 |
34 #include "platform/image-decoders/FastSharedBufferReader.h" | |
35 #include "wtf/PassOwnPtr.h" | 34 #include "wtf/PassOwnPtr.h" |
36 | 35 |
37 namespace blink { | 36 namespace blink { |
38 | 37 |
39 // Number of bits in .BMP used to store the file header (doesn't match | 38 // Number of bits in .BMP used to store the file header (doesn't match |
40 // "sizeof(BMPImageDecoder::BitmapFileHeader)" since we omit some fields and | 39 // "sizeof(BMPImageDecoder::BitmapFileHeader)" since we omit some fields and |
41 // don't pack). | 40 // don't pack). |
42 static const size_t sizeOfFileHeader = 14; | 41 static const size_t sizeOfFileHeader = 14; |
43 | 42 |
44 BMPImageDecoder::BMPImageDecoder(AlphaOption alphaOption, GammaAndColorProfileOp
tion colorOptions, size_t maxDecodedBytes) | 43 BMPImageDecoder::BMPImageDecoder(AlphaOption alphaOption, GammaAndColorProfileOp
tion colorOptions, size_t maxDecodedBytes) |
(...skipping 45 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
90 | 89 |
91 return m_reader->decodeBMP(onlySize); | 90 return m_reader->decodeBMP(onlySize); |
92 } | 91 } |
93 | 92 |
94 bool BMPImageDecoder::processFileHeader(size_t& imgDataOffset) | 93 bool BMPImageDecoder::processFileHeader(size_t& imgDataOffset) |
95 { | 94 { |
96 // Read file header. | 95 // Read file header. |
97 ASSERT(!m_decodedOffset); | 96 ASSERT(!m_decodedOffset); |
98 if (m_data->size() < sizeOfFileHeader) | 97 if (m_data->size() < sizeOfFileHeader) |
99 return false; | 98 return false; |
100 | 99 const uint16_t fileType = (m_data->data()[0] << 8) | static_cast<uint8_t>(m_
data->data()[1]); |
101 char buffer[sizeOfFileHeader]; | 100 imgDataOffset = readUint32(10); |
102 FastSharedBufferReader fastReader(m_data); | |
103 const char* fileHeader = fastReader.getConsecutiveData(0, sizeOfFileHeader,
buffer); | |
104 const uint16_t fileType = (fileHeader[0] << 8) | static_cast<uint8_t>(fileHe
ader[1]); | |
105 imgDataOffset = BMPImageReader::readUint32(&fileHeader[10]); | |
106 m_decodedOffset = sizeOfFileHeader; | 101 m_decodedOffset = sizeOfFileHeader; |
107 | 102 |
108 // See if this is a bitmap filetype we understand. | 103 // See if this is a bitmap filetype we understand. |
109 enum { | 104 enum { |
110 BMAP = 0x424D, // "BM" | 105 BMAP = 0x424D, // "BM" |
111 // The following additional OS/2 2.x header values (see | 106 // The following additional OS/2 2.x header values (see |
112 // http://www.fileformat.info/format/os2bmp/egff.htm ) aren't widely | 107 // http://www.fileformat.info/format/os2bmp/egff.htm ) aren't widely |
113 // decoded, and are unlikely to be in much use. | 108 // decoded, and are unlikely to be in much use. |
114 /* | 109 /* |
115 ICON = 0x4943, // "IC" | 110 ICON = 0x4943, // "IC" |
116 POINTER = 0x5054, // "PT" | 111 POINTER = 0x5054, // "PT" |
117 COLORICON = 0x4349, // "CI" | 112 COLORICON = 0x4349, // "CI" |
118 COLORPOINTER = 0x4350, // "CP" | 113 COLORPOINTER = 0x4350, // "CP" |
119 BITMAPARRAY = 0x4241, // "BA" | 114 BITMAPARRAY = 0x4241, // "BA" |
120 */ | 115 */ |
121 }; | 116 }; |
122 return (fileType == BMAP) || setFailed(); | 117 return (fileType == BMAP) || setFailed(); |
123 } | 118 } |
124 | 119 |
125 } // namespace blink | 120 } // namespace blink |
OLD | NEW |