Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/include/mupdf/fitz/compress.h @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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1 // Copyright (C) 2004-2025 Artifex Software, Inc.
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2 //
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3 // This file is part of MuPDF.
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4 //
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5 // MuPDF is free software: you can redistribute it and/or modify it under the
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6 // terms of the GNU Affero General Public License as published by the Free
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7 // Software Foundation, either version 3 of the License, or (at your option)
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8 // any later version.
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9 //
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10 // MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
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11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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12 // FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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13 // details.
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14 //
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15 // You should have received a copy of the GNU Affero General Public License
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16 // along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
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17 //
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18 // Alternative licensing terms are available from the licensor.
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19 // For commercial licensing, see <https://www.artifex.com/> or contact
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20 // Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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21 // CA 94129, USA, for further information.
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22
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23 #ifndef MUPDF_FITZ_COMPRESS_H
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24 #define MUPDF_FITZ_COMPRESS_H
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26 #include "mupdf/fitz/system.h"
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27 #include "mupdf/fitz/buffer.h"
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28 #include "mupdf/fitz/pixmap.h"
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29
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30 typedef enum
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31 {
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32 FZ_DEFLATE_NONE = 0,
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33 FZ_DEFLATE_BEST_SPEED = 1,
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34 FZ_DEFLATE_BEST = 9,
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35 FZ_DEFLATE_DEFAULT = -1
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36 } fz_deflate_level;
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37
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38 /**
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39 Returns the upper bound on the
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40 size of flated data of length size.
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41 */
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42 size_t fz_deflate_bound(fz_context *ctx, size_t size);
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43
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44 /**
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45 Compress source_length bytes of data starting
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46 at source, into a buffer of length *compressed_length, starting at
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47 dest. *compressed_length will be updated on exit to contain the size
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48 actually used.
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49 */
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50 void fz_deflate(fz_context *ctx, unsigned char *dest, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_deflate_level level);
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51
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52 /**
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53 Compress source_length bytes of data starting
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54 at source, into a new memory block malloced for that purpose.
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55 *compressed_length is updated on exit to contain the size used.
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56 Ownership of the block is returned from this function, and the
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57 caller is therefore responsible for freeing it. The block may be
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58 considerably larger than is actually required. The caller is
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59 free to fz_realloc it down if it wants to.
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60 */
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61 unsigned char *fz_new_deflated_data(fz_context *ctx, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_deflate_level level);
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62
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63 /**
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64 Compress the contents of a fz_buffer into a
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65 new block malloced for that purpose. *compressed_length is
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66 updated on exit to contain the size used. Ownership of the block
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67 is returned from this function, and the caller is therefore
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68 responsible for freeing it. The block may be considerably larger
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69 than is actually required. The caller is free to fz_realloc it
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70 down if it wants to.
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71 */
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72 unsigned char *fz_new_deflated_data_from_buffer(fz_context *ctx, size_t *compressed_length, fz_buffer *buffer, fz_deflate_level level);
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73
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74 typedef enum
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75 {
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76 FZ_BROTLI_NONE = 0,
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77 FZ_BROTLI_BEST_SPEED = 1,
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78 FZ_BROTLI_BEST = 11,
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79 FZ_BROTLI_DEFAULT = 6 /* Guess */
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80 } fz_brotli_level;
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81
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82 /**
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83 Returns the upper bound on the
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84 size of brotli compressed data of length size.
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85 */
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86 size_t fz_brotli_bound(fz_context *ctx, size_t size);
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87
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88 /**
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89 Compress source_length bytes of data starting
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90 at source, into a buffer of length *destLen, starting at dest.
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91 *compressed_length will be updated on exit to contain the size
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92 actually used.
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93 */
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94 void fz_compress_brotli(fz_context *ctx, unsigned char *dest, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_brotli_level level);
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95
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96 /**
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97 Compress source_length bytes of data starting
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98 at source, into a new memory block malloced for that purpose.
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99 *compressed_length is updated on exit to contain the size used.
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100 Ownership of the block is returned from this function, and the
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101 caller is therefore responsible for freeing it. The block may be
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102 considerably larger than is actually required. The caller is
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103 free to fz_realloc it down if it wants to.
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104 */
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105 unsigned char *fz_new_brotli_data(fz_context *ctx, size_t *compressed_length, const unsigned char *source, size_t source_length, fz_brotli_level level);
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106
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107 /**
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108 Compress the contents of a fz_buffer into a
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109 new block malloced for that purpose. *compressed_length is
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110 updated on exit to contain the size used. Ownership of the block
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111 is returned from this function, and the caller is therefore
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112 responsible for freeing it. The block may be considerably larger
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113 than is actually required. The caller is free to fz_realloc it
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114 down if it wants to.
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115 */
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116 unsigned char *fz_new_brotli_data_from_buffer(fz_context *ctx, size_t *compressed_length, fz_buffer *buffer, fz_brotli_level level);
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117
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118 /**
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119 Compress bitmap data as CCITT Group 3 1D fax image.
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120 Creates a stream assuming the default PDF parameters,
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121 except the number of columns.
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122 */
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123 fz_buffer *fz_compress_ccitt_fax_g3(fz_context *ctx, const unsigned char *data, int columns, int rows, ptrdiff_t stride);
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124
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125 /**
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126 Compress bitmap data as CCITT Group 4 2D fax image.
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127 Creates a stream assuming the default PDF parameters, except
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128 K=-1 and the number of columns.
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129 */
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130 fz_buffer *fz_compress_ccitt_fax_g4(fz_context *ctx, const unsigned char *data, int columns, int rows, ptrdiff_t stride);
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131
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132 #endif