Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/leptonica/src/bmp.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*====================================================================*
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2 - Copyright (C) 2001 Leptonica. All rights reserved.
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3 -
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4 - Redistribution and use in source and binary forms, with or without
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5 - modification, are permitted provided that the following conditions
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6 - are met:
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7 - 1. Redistributions of source code must retain the above copyright
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8 - notice, this list of conditions and the following disclaimer.
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9 - 2. Redistributions in binary form must reproduce the above
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10 - copyright notice, this list of conditions and the following
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11 - disclaimer in the documentation and/or other materials
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12 - provided with the distribution.
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13 -
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14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
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18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 *====================================================================*/
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26
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27 #ifndef LEPTONICA_BMP_H
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28 #define LEPTONICA_BMP_H
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29
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30 /*!
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31 * \file bmp.h
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32 *
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33 * <pre>
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34 * This file is here to describe the fields in the header of
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35 * the BMP file. These fields are not used directly in Leptonica.
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36 * The only thing we use are the sizes of these two headers.
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37 * Furthermore, because of potential namespace conflicts with
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38 * the typedefs and defined sizes, we have changed the names
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39 * to protect anyone who may also need to use the original definitions.
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40 * Thanks to J. D. Bryan for pointing out the potential problems when
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41 * developing on Win32 compatible systems.
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42 * </pre>
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43 */
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44
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45 /*-------------------------------------------------------------*
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46 * BMP file header *
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47 *-------------------------------------------------------------*/
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48
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49 /*! BMP file header
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50 *
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51 * Notes:
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52 * (1) The bfSize field is stored as a 32 bit integer and includes
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53 * the size of the BMP_FileHeader, BMP_InfoHeader, the color
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54 * table (if any), and the size of the DIB bits.
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55 * (2) The bfOffBits field is also stored as a 32 bit integer and
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56 * contains the absolute offset in bytes of the image data
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57 * in this file. Some bmp files have additional data after the
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58 * BMP_InfoHeader and before the color table (if it exists).
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59 * However, enabling reading of these files makes the reader
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60 * vulnerable to various malware attacks. Therefore we do not
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61 * read bmp files with extra data, and require that the size
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62 * of the color table in bytes is
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63 * offset - sizeof(BMP_FileHeader) - sizeof(BMP_InfoHeader)
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64 * (3) Use arrays of l_uint8[] to make an endianness agnostic
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65 * access to the BMP_FileHeader easier.
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66 */
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67 struct BMP_FileHeader
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68 {
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69 l_uint8 bfType[2]; /*!< file type; must be "BM" */
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70 l_uint8 bfSize[4]; /*!< length of the file;
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71 sizeof(BMP_FileHeader) +
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72 sizeof(BMP_InfoHeader) +
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73 size of optional extra data +
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74 size of color table +
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75 size of DIB bits */
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76 l_uint8 bfReserved1[2]; /*!< don't care (set to 0) */
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77 l_uint8 bfReserved2[2]; /*!< don't care (set to 0) */
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78 l_uint8 bfOffBits[4]; /*!< offset from beginning of file */
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79 };
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80 typedef struct BMP_FileHeader BMP_FH;
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81
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82 /*! Number of bytes in a BMP file header */
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83 #define BMP_FHBYTES sizeof(BMP_FH)
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84
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85
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86 /*-------------------------------------------------------------*
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87 * BMP info header *
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88 *-------------------------------------------------------------*/
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89
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90 /*! BMP info header */
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91 struct BMP_InfoHeader
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92 {
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93 l_int32 biSize; /*!< size of the BMP_InfoHeader struct */
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94 l_int32 biWidth; /*!< bitmap width in pixels */
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95 l_int32 biHeight; /*!< bitmap height in pixels */
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96 l_int16 biPlanes; /*!< number of bitmap planes */
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97 l_int16 biBitCount; /*!< number of bits per pixel */
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98 l_int32 biCompression; /*!< compress format (0 == uncompressed) */
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99 l_int32 biSizeImage; /*!< size of image in bytes */
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100 l_int32 biXPelsPerMeter; /*!< pixels per meter in x direction */
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101 l_int32 biYPelsPerMeter; /*!< pixels per meter in y direction */
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102 l_int32 biClrUsed; /*!< number of colors used */
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103 l_int32 biClrImportant; /*!< number of important colors used */
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104 };
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105 typedef struct BMP_InfoHeader BMP_IH;
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106
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107 /*! Number of bytes in a BMP info header */
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108 #define BMP_IHBYTES sizeof(BMP_IH)
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109
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110 #endif /* LEPTONICA_BMP_H */