Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/include/mupdf/fitz/compressed-buffer.h @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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2
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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_COMPRESSED_BUFFER_H
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24 #define MUPDF_FITZ_COMPRESSED_BUFFER_H
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25
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26 #include "mupdf/fitz/system.h"
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27 #include "mupdf/fitz/context.h"
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28 #include "mupdf/fitz/buffer.h"
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29 #include "mupdf/fitz/stream.h"
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30 #include "mupdf/fitz/filter.h"
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31
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32 /**
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33 Compression parameters used for buffers of compressed data;
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34 typically for the source data for images.
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35 */
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36 typedef struct
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37 {
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38 int type;
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39 union {
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40 struct {
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41 int color_transform; /* Use -1 for unset */
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42 int invert_cmyk; /* Use 1 for standalone JPEG files */
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43 } jpeg;
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44 struct {
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45 int smask_in_data;
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46 } jpx;
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47 struct {
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48 fz_jbig2_globals *globals;
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49 int embedded;
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50 } jbig2;
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51 struct {
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52 int columns;
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53 int rows;
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54 int k;
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55 int end_of_line;
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56 int encoded_byte_align;
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57 int end_of_block;
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58 int black_is_1;
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59 int damaged_rows_before_error;
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60 } fax;
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61 struct
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62 {
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63 int columns;
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64 int colors;
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65 int predictor;
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66 int bpc;
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67 }
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68 flate;
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69 struct
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70 {
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71 int columns;
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72 int colors;
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73 int predictor;
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74 int bpc;
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75 }
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76 brotli;
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77 struct
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78 {
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79 int columns;
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80 int colors;
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81 int predictor;
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82 int bpc;
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83 int early_change;
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84 } lzw;
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85 } u;
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86 } fz_compression_params;
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87
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88 /**
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89 Buffers of compressed data; typically for the source data
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90 for images.
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91 */
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92 typedef struct
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93 {
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94 int refs;
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95 fz_compression_params params;
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96 fz_buffer *buffer;
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97 } fz_compressed_buffer;
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98
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99 /**
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100 Take a reference to an fz_compressed_buffer.
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101 */
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102 fz_compressed_buffer *fz_keep_compressed_buffer(fz_context *ctx, fz_compressed_buffer *cbuf);
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103
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104 /**
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diff changeset
105 Return the storage size used for a buffer and its data.
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106 Used in implementing store handling.
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107
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108 Never throws exceptions.
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109 */
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110 size_t fz_compressed_buffer_size(fz_compressed_buffer *buffer);
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111
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112 /**
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diff changeset
113 Open a stream to read the decompressed version of a buffer.
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114 */
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115 fz_stream *fz_open_compressed_buffer(fz_context *ctx, fz_compressed_buffer *);
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116
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117 /**
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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diff changeset
118 Open a stream to read the decompressed version of a buffer,
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119 with optional log2 subsampling.
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120
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121 l2factor = NULL for no subsampling, or a pointer to an integer
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122 containing the maximum log2 subsample factor acceptable (0 =
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123 none, 1 = halve dimensions, 2 = quarter dimensions etc). If
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124 non-NULL, then *l2factor will be updated on exit with the actual
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125 log2 subsample factor achieved.
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126 */
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127 fz_stream *fz_open_image_decomp_stream_from_buffer(fz_context *ctx, fz_compressed_buffer *, int *l2factor);
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128
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129 /**
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diff changeset
130 Open a stream to read the decompressed version of another stream
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131 with optional log2 subsampling.
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132 */
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133 fz_stream *fz_open_image_decomp_stream(fz_context *ctx, fz_stream *, fz_compression_params *, int *l2factor);
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134
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135 /**
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136 Recognise image format strings in the first 8 bytes from image
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137 data.
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138 */
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139 int fz_recognize_image_format(fz_context *ctx, unsigned char p[8]);
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140
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141 /**
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diff changeset
142 Map from FZ_IMAGE_* value to string.
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143
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144 The returned string is static and therefore must not be freed.
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145 */
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146 const char *fz_image_type_name(int type);
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147
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148 /**
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149 Map from (case sensitive) image type string to FZ_IMAGE_*
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150 type value.
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151 */
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152 int fz_lookup_image_type(const char *type);
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153
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154 enum
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155 {
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156 FZ_IMAGE_UNKNOWN = 0,
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157
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158 /* Uncompressed samples */
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159 FZ_IMAGE_RAW,
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160
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161 /* Compressed samples */
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162 FZ_IMAGE_FAX,
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163 FZ_IMAGE_FLATE,
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164 FZ_IMAGE_LZW,
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165 FZ_IMAGE_RLD,
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166 FZ_IMAGE_BROTLI,
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167
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168 /* Full image formats */
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169 FZ_IMAGE_BMP,
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170 FZ_IMAGE_GIF,
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171 FZ_IMAGE_JBIG2,
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172 FZ_IMAGE_JPEG,
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173 FZ_IMAGE_JPX,
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diff changeset
174 FZ_IMAGE_JXR,
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175 FZ_IMAGE_PNG,
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176 FZ_IMAGE_PNM,
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177 FZ_IMAGE_TIFF,
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178 FZ_IMAGE_PSD,
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diff changeset
179 };
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180
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181 /**
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diff changeset
182 Drop a reference to a compressed buffer. Destroys the buffer
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183 and frees any storage/other references held by it.
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184
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diff changeset
185 Never throws exceptions.
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186 */
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diff changeset
187 void fz_drop_compressed_buffer(fz_context *ctx, fz_compressed_buffer *buf);
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188
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diff changeset
189 /**
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diff changeset
190 Create a new, UNKNOWN format, compressed_buffer.
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191 */
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parents:
diff changeset
192 fz_compressed_buffer *fz_new_compressed_buffer(fz_context *ctx);
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193
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diff changeset
194 #endif