Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/source/fitz/color-imp.h @ 32:72c1b70d4f5c

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author Franz Glasner <fzglas.hg@dom66.de>
date Sun, 21 Sep 2025 15:10:12 +0200
parents b50eed0cc0ef
children
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1 // Copyright (C) 2004-2021 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 FITZ_COLOR_IMP_H
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24 #define FITZ_COLOR_IMP_H
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26 #include "mupdf/fitz.h"
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28 typedef struct fz_color_converter fz_color_converter;
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30 /* Color management engine */
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32 #if FZ_ENABLE_ICC
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33
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34 /*
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35 Create ICC profile from PDF calGray and calRGB definitions
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36 */
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37 fz_buffer *fz_new_icc_data_from_cal(fz_context *ctx, float wp[3], float bp[3], float *gamma, float matrix[9], int n);
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38
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39 /*
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40 Opaque type for a link (transform) generated between ICC
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41 profiles.
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42 */
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43 typedef struct fz_icc_link fz_icc_link;
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44
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45 void fz_new_icc_context(fz_context *ctx);
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46 void fz_drop_icc_context(fz_context *ctx);
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47 fz_icc_profile *fz_new_icc_profile(fz_context *ctx, unsigned char *data, size_t size);
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48 void fz_drop_icc_profile(fz_context *ctx, fz_icc_profile *profile);
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49 void fz_icc_profile_name(fz_context *ctx, fz_icc_profile *profile, char *name, size_t size);
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50 int fz_icc_profile_components(fz_context *ctx, fz_icc_profile *profile);
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51 int fz_icc_profile_is_lab(fz_context *ctx, fz_icc_profile *profile);
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52 fz_icc_link *fz_new_icc_link(fz_context *ctx,
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53 fz_colorspace *src, int src_extras,
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54 fz_colorspace *dst, int dst_extras,
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55 fz_colorspace *prf,
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56 fz_color_params color_params,
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57 int format,
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58 int copy_spots,
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59 int premult);
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60 void fz_drop_icc_link_imp(fz_context *ctx, fz_storable *link);
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61 void fz_drop_icc_link(fz_context *ctx, fz_icc_link *link);
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62 fz_icc_link *fz_find_icc_link(fz_context *ctx,
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63 fz_colorspace *src, int src_extras,
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64 fz_colorspace *dst, int dst_extras,
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65 fz_colorspace *prf,
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66 fz_color_params color_params,
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67 int format,
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68 int copy_spots,
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69 int premult);
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70 void fz_icc_transform_color(fz_context *ctx, fz_color_converter *cc, const float *src, float *dst);
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71 void fz_icc_transform_pixmap(fz_context *ctx, fz_icc_link *link, const fz_pixmap *src, fz_pixmap *dst, int copy_spots);
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72
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73 #endif
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74
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75 typedef void (fz_color_convert_fn)(fz_context *ctx, fz_color_converter *cc, const float *src, float *dst);
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76
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77 struct fz_color_converter
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78 {
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79 fz_color_convert_fn *convert;
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80 fz_color_convert_fn *convert_via;
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81 fz_colorspace *ds;
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82 fz_separations *dseps;
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83 int dst_n;
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84 fz_colorspace *ss;
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85 fz_colorspace *ss_via;
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86 void *opaque;
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87 #if FZ_ENABLE_ICC
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88 fz_icc_link *link;
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89 #endif
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90 };
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91
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92 struct fz_colorspace_context
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93 {
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94 int ctx_refs;
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95 fz_colorspace *gray, *rgb, *bgr, *cmyk, *lab;
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96 #if FZ_ENABLE_ICC
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97 void *icc_instance;
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98 #endif
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99 };
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100
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101 void fz_drop_colorspace_store_key(fz_context *ctx, fz_colorspace *cs);
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102 fz_colorspace *fz_keep_colorspace_store_key(fz_context *ctx, fz_colorspace *cs);
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103
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104 void fz_init_cached_color_converter(fz_context *ctx, fz_color_converter *cc, fz_colorspace *ss, fz_colorspace *ds, fz_separations *seps, fz_colorspace *is, fz_color_params params);
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105 void fz_fin_cached_color_converter(fz_context *ctx, fz_color_converter *cc);
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106 fz_color_convert_fn *fz_lookup_fast_color_converter(fz_context *ctx, fz_colorspace *ss, fz_colorspace *ds);
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107 void fz_find_color_converter(fz_context *ctx, fz_color_converter *cc, fz_colorspace *ss, fz_colorspace *ds, fz_separations *seps, fz_colorspace *is, fz_color_params params);
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108 void fz_drop_color_converter(fz_context *ctx, fz_color_converter *cc);
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109
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110 /*
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111 Color convert a pixmap. The passing of default_cs is needed due
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112 to the base cs of the image possibly needing to be treated as
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113 being in one of the page default color spaces.
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114 */
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115 void fz_convert_pixmap_samples(fz_context *ctx, const fz_pixmap *src, fz_pixmap *dst, fz_colorspace *prf, const fz_default_colorspaces *default_cs, fz_color_params color_params, int copy_spots);
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116 void fz_fast_any_to_alpha(fz_context *ctx, const fz_pixmap *src, fz_pixmap *dst, int copy_spots);
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117 void fz_convert_fast_pixmap_samples(fz_context *ctx, const fz_pixmap *src, fz_pixmap *dst, int copy_spots);
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118 void fz_convert_slow_pixmap_samples(fz_context *ctx, const fz_pixmap *src, fz_pixmap *dst, fz_colorspace *prf, fz_color_params params, int copy_spots);
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119
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120 /**
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121 Attempt to init a color converter to work by copying separation values.
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122 */
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123 int
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124 fz_init_separation_copy_color_converter(fz_context *ctx, fz_color_converter *cc, fz_colorspace *ss, fz_colorspace *ds, fz_separations *dseps, fz_colorspace *is, fz_color_params params);
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125
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126
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127 #endif