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| 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 |
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| 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 #ifndef BMPImageReader_h | 31 #ifndef BMPImageReader_h |
| 32 #define BMPImageReader_h | 32 #define BMPImageReader_h |
| 33 | 33 |
| 34 #include <stdint.h> | 34 #include <stdint.h> |
| 35 #include "platform/image-decoders/ImageDecoder.h" | 35 #include "platform/image-decoders/ImageDecoder.h" |
| 36 #include "wtf/CPU.h" | 36 #include "wtf/CPU.h" |
| 37 | 37 |
| 38 namespace WebCore { | 38 namespace blink { |
| 39 | 39 |
| 40 // This class decodes a BMP image. It is used in the BMP and ICO decoders, | 40 // This class decodes a BMP image. It is used in the BMP and ICO decoders, |
| 41 // which wrap it in the appropriate code to read file headers, etc. | 41 // which wrap it in the appropriate code to read file headers, etc. |
| 42 class PLATFORM_EXPORT BMPImageReader { | 42 class PLATFORM_EXPORT BMPImageReader { |
| 43 WTF_MAKE_FAST_ALLOCATED; | 43 WTF_MAKE_FAST_ALLOCATED; |
| 44 public: | 44 public: |
| 45 // Read a value from |data[offset]|, converting from little to native | 45 // Read a value from |data[offset]|, converting from little to native |
| 46 // endianness. | 46 // endianness. |
| 47 static inline uint16_t readUint16(SharedBuffer* data, int offset) | 47 static inline uint16_t readUint16(SharedBuffer* data, int offset) |
| 48 { | 48 { |
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| 342 // know if we're in an ICO container. | 342 // know if we're in an ICO container. |
| 343 bool m_isInICO; | 343 bool m_isInICO; |
| 344 | 344 |
| 345 // ICOs store a 1bpp "mask" immediately after the main bitmap image data | 345 // ICOs store a 1bpp "mask" immediately after the main bitmap image data |
| 346 // (and, confusingly, add its height to the biHeight value in the info | 346 // (and, confusingly, add its height to the biHeight value in the info |
| 347 // header, thus doubling it). If |m_isInICO| is true, this variable tracks | 347 // header, thus doubling it). If |m_isInICO| is true, this variable tracks |
| 348 // whether we've begun decoding this mask yet. | 348 // whether we've begun decoding this mask yet. |
| 349 bool m_decodingAndMask; | 349 bool m_decodingAndMask; |
| 350 }; | 350 }; |
| 351 | 351 |
| 352 } // namespace WebCore | 352 } // namespace blink |
| 353 | 353 |
| 354 #endif | 354 #endif |
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