Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/include/mupdf/fitz/display-list.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) 2004-2021 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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23 #ifndef MUPDF_FITZ_DISPLAY_LIST_H
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24 #define MUPDF_FITZ_DISPLAY_LIST_H
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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/geometry.h"
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29 #include "mupdf/fitz/device.h"
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31 /**
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32 Display list device -- record and play back device commands.
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33 */
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34
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35 /**
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36 fz_display_list is a list containing drawing commands (text,
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37 images, etc.). The intent is two-fold: as a caching-mechanism
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38 to reduce parsing of a page, and to be used as a data
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39 structure in multi-threading where one thread parses the page
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40 and another renders pages.
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41
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42 Create a display list with fz_new_display_list, hand it over to
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43 fz_new_list_device to have it populated, and later replay the
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44 list (once or many times) by calling fz_run_display_list. When
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45 the list is no longer needed drop it with fz_drop_display_list.
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46 */
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47 typedef struct fz_display_list fz_display_list;
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48
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49 /**
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50 Create an empty display list.
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51
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52 A display list contains drawing commands (text, images, etc.).
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53 Use fz_new_list_device for populating the list.
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55 mediabox: Bounds of the page (in points) represented by the
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56 display list.
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57 */
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58 fz_display_list *fz_new_display_list(fz_context *ctx, fz_rect mediabox);
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59
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60 /**
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61 Create a rendering device for a display list.
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62
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63 When the device is rendering a page it will populate the
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64 display list with drawing commands (text, images, etc.). The
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65 display list can later be reused to render a page many times
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66 without having to re-interpret the page from the document file
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67 for each rendering. Once the device is no longer needed, free
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68 it with fz_drop_device.
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69
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70 list: A display list that the list device takes a reference to.
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71 */
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72 fz_device *fz_new_list_device(fz_context *ctx, fz_display_list *list);
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73
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74 /**
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75 (Re)-run a display list through a device.
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76
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77 list: A display list, created by fz_new_display_list and
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78 populated with objects from a page by running fz_run_page on a
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79 device obtained from fz_new_list_device.
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80
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81 ctm: Transform to apply to display list contents. May include
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82 for example scaling and rotation, see fz_scale, fz_rotate and
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83 fz_concat. Set to fz_identity if no transformation is desired.
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84
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85 scissor: Only the part of the contents of the display list
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86 visible within this area will be considered when the list is
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87 run through the device. This does not imply for tile objects
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88 contained in the display list.
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89
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90 cookie: Communication mechanism between caller and library
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91 running the page. Intended for multi-threaded applications,
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92 while single-threaded applications set cookie to NULL. The
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93 caller may abort an ongoing page run. Cookie also communicates
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94 progress information back to the caller. The fields inside
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95 cookie are continually updated while the page is being run.
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96 */
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97 void fz_run_display_list(fz_context *ctx, fz_display_list *list, fz_device *dev, fz_matrix ctm, fz_rect scissor, fz_cookie *cookie);
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98
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99 /**
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100 Increment the reference count for a display list. Returns the
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101 same pointer.
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102
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103 Never throws exceptions.
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104 */
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105 fz_display_list *fz_keep_display_list(fz_context *ctx, fz_display_list *list);
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106
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107 /**
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108 Decrement the reference count for a display list. When the
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109 reference count reaches zero, all the references in the display
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110 list itself are dropped, and the display list is freed.
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111
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112 Never throws exceptions.
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113 */
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114 void fz_drop_display_list(fz_context *ctx, fz_display_list *list);
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115
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116 /**
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117 Return the bounding box of the page recorded in a display list.
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118 */
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119 fz_rect fz_bound_display_list(fz_context *ctx, fz_display_list *list);
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120
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121 /**
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122 Create a new image from a display list.
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123
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124 w, h: The conceptual width/height of the image.
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125
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126 transform: The matrix that needs to be applied to the given
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127 list to make it render to the unit square.
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128
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129 list: The display list.
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130 */
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131 fz_image *fz_new_image_from_display_list(fz_context *ctx, float w, float h, fz_display_list *list);
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132
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133 /**
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134 Check for a display list being empty
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135
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136 list: The list to check.
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137
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138 Returns true if empty, false otherwise.
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139 */
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140 int fz_display_list_is_empty(fz_context *ctx, const fz_display_list *list);
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141
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142 #endif