Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/include/mupdf/pdf/resource.h @ 5:710d30cd138a

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author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 12:32:08 +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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23 #ifndef MUPDF_PDF_RESOURCE_H
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24 #define MUPDF_PDF_RESOURCE_H
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26 #include "mupdf/fitz/font.h"
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27 #include "mupdf/fitz/image.h"
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28 #include "mupdf/fitz/shade.h"
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29 #include "mupdf/fitz/store.h"
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30 #include "mupdf/pdf/object.h"
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32 void pdf_store_item(fz_context *ctx, pdf_obj *key, void *val, size_t itemsize);
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33 void *pdf_find_item(fz_context *ctx, fz_store_drop_fn *drop, pdf_obj *key);
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34 void pdf_remove_item(fz_context *ctx, fz_store_drop_fn *drop, pdf_obj *key);
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35 void pdf_empty_store(fz_context *ctx, pdf_document *doc);
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36 void pdf_purge_locals_from_store(fz_context *ctx, pdf_document *doc);
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37 void pdf_purge_object_from_store(fz_context *ctx, pdf_document *doc, int num);
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39 /*
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40 * Structures used for managing resource locations and avoiding multiple
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41 * occurrences when resources are added to the document. The search for existing
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42 * resources will be performed when we are first trying to add an item. Object
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43 * refs are stored in a fz_hash_table structure using a hash of the md5 sum of
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44 * the data, enabling rapid lookup.
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45 */
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47 enum { PDF_SIMPLE_FONT_RESOURCE=1, PDF_CID_FONT_RESOURCE=2, PDF_CJK_FONT_RESOURCE=3 };
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48 enum { PDF_SIMPLE_ENCODING_LATIN, PDF_SIMPLE_ENCODING_GREEK, PDF_SIMPLE_ENCODING_CYRILLIC };
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49
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50 /* The contents of this structure are defined publicly just so we can
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51 * define this on the stack. */
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52 typedef struct
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53 {
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54 unsigned char digest[16];
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55 int type;
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56 int encoding;
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57 int local_xref;
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58 } pdf_font_resource_key;
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60 typedef struct
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61 {
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62 unsigned char digest[16];
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63 int local_xref;
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64 } pdf_colorspace_resource_key;
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66 pdf_obj *pdf_find_font_resource(fz_context *ctx, pdf_document *doc, int type, int encoding, fz_font *item, pdf_font_resource_key *key);
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67 pdf_obj *pdf_insert_font_resource(fz_context *ctx, pdf_document *doc, pdf_font_resource_key *key, pdf_obj *obj);
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68 pdf_obj *pdf_find_colorspace_resource(fz_context *ctx, pdf_document *doc, fz_colorspace *item, pdf_colorspace_resource_key *key);
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69 pdf_obj *pdf_insert_colorspace_resource(fz_context *ctx, pdf_document *doc, pdf_colorspace_resource_key *key, pdf_obj *obj);
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70 void pdf_drop_resource_tables(fz_context *ctx, pdf_document *doc);
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71 void pdf_purge_local_resources(fz_context *ctx, pdf_document *doc);
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73 typedef struct pdf_function pdf_function;
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75 void pdf_eval_function(fz_context *ctx, pdf_function *func, const float *in, int inlen, float *out, int outlen);
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76 pdf_function *pdf_keep_function(fz_context *ctx, pdf_function *func);
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77 void pdf_drop_function(fz_context *ctx, pdf_function *func);
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78 size_t pdf_function_size(fz_context *ctx, pdf_function *func);
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79 pdf_function *pdf_load_function(fz_context *ctx, pdf_obj *ref, int in, int out);
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81 fz_colorspace *pdf_document_output_intent(fz_context *ctx, pdf_document *doc);
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82 fz_colorspace *pdf_load_colorspace(fz_context *ctx, pdf_obj *obj);
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83 int pdf_is_tint_colorspace(fz_context *ctx, fz_colorspace *cs);
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84
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85 fz_shade *pdf_load_shading(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
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86 void pdf_sample_shade_function(fz_context *ctx, float *samples, int n, int funcs, pdf_function **func, float t0, float t1);
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88 /**
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89 Function to recolor a single color from a shade.
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90 */
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91 typedef void (pdf_recolor_vertex)(fz_context *ctx, void *opaque, fz_colorspace *dst_cs, float *d, fz_colorspace *src_cs, const float *src);
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93 /**
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94 Function to handle recoloring a shade.
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95
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96 Called with src_cs from the shade. If no recoloring is required, return NULL. Otherwise
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97 fill in *dst_cs, and return a vertex recolorer.
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98 */
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99 typedef pdf_recolor_vertex *(pdf_shade_recolorer)(fz_context *ctx, void *opaque, fz_colorspace *src_cs, fz_colorspace **dst_cs);
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100
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101 /**
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102 Recolor a shade.
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103 */
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104 pdf_obj *pdf_recolor_shade(fz_context *ctx, pdf_obj *shade, pdf_shade_recolorer *reshade, void *opaque);
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105
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106 fz_image *pdf_load_inline_image(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *dict, fz_stream *file);
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107 int pdf_is_jpx_image(fz_context *ctx, pdf_obj *dict);
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108
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109 fz_image *pdf_load_image(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
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110
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111 pdf_obj *pdf_add_image(fz_context *ctx, pdf_document *doc, fz_image *image);
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112
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113 pdf_obj *pdf_add_colorspace(fz_context *ctx, pdf_document *doc, fz_colorspace *cs);
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114
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115 typedef struct
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116 {
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117 fz_storable storable;
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118 int ismask;
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119 float xstep;
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120 float ystep;
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121 fz_matrix matrix;
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122 fz_rect bbox;
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123 pdf_document *document;
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124 pdf_obj *resources;
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125 pdf_obj *contents;
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126 int id; /* unique ID for caching rendered tiles */
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127 } pdf_pattern;
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128
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129 pdf_pattern *pdf_load_pattern(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
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130 pdf_pattern *pdf_keep_pattern(fz_context *ctx, pdf_pattern *pat);
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131 void pdf_drop_pattern(fz_context *ctx, pdf_pattern *pat);
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132
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133 pdf_obj *pdf_new_xobject(fz_context *ctx, pdf_document *doc, fz_rect bbox, fz_matrix matrix, pdf_obj *res, fz_buffer *buffer);
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134 void pdf_update_xobject(fz_context *ctx, pdf_document *doc, pdf_obj *xobj, fz_rect bbox, fz_matrix mat, pdf_obj *res, fz_buffer *buffer);
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135
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136 pdf_obj *pdf_xobject_resources(fz_context *ctx, pdf_obj *xobj);
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137 fz_rect pdf_xobject_bbox(fz_context *ctx, pdf_obj *xobj);
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138 fz_matrix pdf_xobject_matrix(fz_context *ctx, pdf_obj *xobj);
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139 int pdf_xobject_isolated(fz_context *ctx, pdf_obj *xobj);
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140 int pdf_xobject_knockout(fz_context *ctx, pdf_obj *xobj);
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141 int pdf_xobject_transparency(fz_context *ctx, pdf_obj *xobj);
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142 fz_colorspace *pdf_xobject_colorspace(fz_context *ctx, pdf_obj *xobj);
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143
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144 #endif