Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/openjpeg/src/lib/openjp2/sparse_array.h @ 29:f76e6575dca9 v1.26.4+1

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+++++ v1.26.4+1
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 19:59:23 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * The copyright in this software is being made available under the 2-clauses
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3 * BSD License, included below. This software may be subject to other third
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4 * party and contributor rights, including patent rights, and no such rights
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5 * are granted under this license.
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6 *
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7 * Copyright (c) 2017, IntoPix SA <contact@intopix.com>
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8 * All rights reserved.
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9 *
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10 * Redistribution and use in source and binary forms, with or without
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11 * modification, are permitted provided that the following conditions
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12 * are met:
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13 * 1. Redistributions of source code must retain the above copyright
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14 * notice, this list of conditions and the following disclaimer.
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15 * 2. Redistributions in binary form must reproduce the above copyright
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16 * notice, this list of conditions and the following disclaimer in the
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17 * documentation and/or other materials provided with the distribution.
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18 *
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19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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29 * POSSIBILITY OF SUCH DAMAGE.
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30 */
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32 #include "opj_includes.h"
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34 #ifndef OPJ_SPARSE_ARRAY_H
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35 #define OPJ_SPARSE_ARRAY_H
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36 /**
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37 @file sparse_array.h
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38 @brief Sparse array management
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40 The functions in this file manage sparse arrays. Sparse arrays are arrays with
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41 potential big dimensions, but with very few samples actually set. Such sparse
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42 arrays require allocating a low amount of memory, by just allocating memory
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43 for blocks of the array that are set. The minimum memory allocation unit is a
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44 a block. There is a trade-off to pick up an appropriate dimension for blocks.
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45 If it is too big, and pixels set are far from each other, too much memory will
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46 be used. If blocks are too small, the book-keeping costs of blocks will raise.
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47 */
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49 /** @defgroup SPARSE_ARRAY SPARSE ARRAYS - Sparse arrays */
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50 /*@{*/
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51
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52 /** Opaque type for sparse arrays that contain int32 values */
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53 typedef struct opj_sparse_array_int32 opj_sparse_array_int32_t;
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54
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55 /** Creates a new sparse array.
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56 * @param width total width of the array.
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57 * @param height total height of the array
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58 * @param block_width width of a block.
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59 * @param block_height height of a block.
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60 * @return a new sparse array instance, or NULL in case of failure.
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61 */
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62 opj_sparse_array_int32_t* opj_sparse_array_int32_create(OPJ_UINT32 width,
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63 OPJ_UINT32 height,
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64 OPJ_UINT32 block_width,
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65 OPJ_UINT32 block_height);
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66
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67 /** Frees a sparse array.
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68 * @param sa sparse array instance.
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69 */
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70 void opj_sparse_array_int32_free(opj_sparse_array_int32_t* sa);
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72 /** Returns whether region bounds are valid (non empty and within array bounds)
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73 * @param sa sparse array instance.
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74 * @param x0 left x coordinate of the region.
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75 * @param y0 top x coordinate of the region.
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76 * @param x1 right x coordinate (not included) of the region. Must be greater than x0.
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77 * @param y1 bottom y coordinate (not included) of the region. Must be greater than y0.
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78 * @return OPJ_TRUE or OPJ_FALSE.
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79 */
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80 OPJ_BOOL opj_sparse_array_is_region_valid(const opj_sparse_array_int32_t* sa,
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81 OPJ_UINT32 x0,
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82 OPJ_UINT32 y0,
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83 OPJ_UINT32 x1,
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84 OPJ_UINT32 y1);
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86 /** Read the content of a rectangular region of the sparse array into a
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87 * user buffer.
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88 *
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89 * Regions not written with opj_sparse_array_int32_write() are read as 0.
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90 *
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91 * @param sa sparse array instance.
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92 * @param x0 left x coordinate of the region to read in the sparse array.
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93 * @param y0 top x coordinate of the region to read in the sparse array.
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94 * @param x1 right x coordinate (not included) of the region to read in the sparse array. Must be greater than x0.
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95 * @param y1 bottom y coordinate (not included) of the region to read in the sparse array. Must be greater than y0.
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96 * @param dest user buffer to fill. Must be at least sizeof(int32) * ( (y1 - y0 - 1) * dest_line_stride + (x1 - x0 - 1) * dest_col_stride + 1) bytes large.
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97 * @param dest_col_stride spacing (in elements, not in bytes) in x dimension between consecutive elements of the user buffer.
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98 * @param dest_line_stride spacing (in elements, not in bytes) in y dimension between consecutive elements of the user buffer.
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99 * @param forgiving if set to TRUE and the region is invalid, OPJ_TRUE will still be returned.
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100 * @return OPJ_TRUE in case of success.
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101 */
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102 OPJ_BOOL opj_sparse_array_int32_read(const opj_sparse_array_int32_t* sa,
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103 OPJ_UINT32 x0,
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104 OPJ_UINT32 y0,
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105 OPJ_UINT32 x1,
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106 OPJ_UINT32 y1,
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107 OPJ_INT32* dest,
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108 OPJ_UINT32 dest_col_stride,
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109 OPJ_UINT32 dest_line_stride,
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110 OPJ_BOOL forgiving);
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111
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112
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113 /** Write the content of a rectangular region into the sparse array from a
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114 * user buffer.
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115 *
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116 * Blocks intersecting the region are allocated, if not already done.
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117 *
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118 * @param sa sparse array instance.
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119 * @param x0 left x coordinate of the region to write into the sparse array.
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120 * @param y0 top x coordinate of the region to write into the sparse array.
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121 * @param x1 right x coordinate (not included) of the region to write into the sparse array. Must be greater than x0.
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122 * @param y1 bottom y coordinate (not included) of the region to write into the sparse array. Must be greater than y0.
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123 * @param src user buffer to fill. Must be at least sizeof(int32) * ( (y1 - y0 - 1) * src_line_stride + (x1 - x0 - 1) * src_col_stride + 1) bytes large.
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124 * @param src_col_stride spacing (in elements, not in bytes) in x dimension between consecutive elements of the user buffer.
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125 * @param src_line_stride spacing (in elements, not in bytes) in y dimension between consecutive elements of the user buffer.
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126 * @param forgiving if set to TRUE and the region is invalid, OPJ_TRUE will still be returned.
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127 * @return OPJ_TRUE in case of success.
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128 */
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129 OPJ_BOOL opj_sparse_array_int32_write(opj_sparse_array_int32_t* sa,
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130 OPJ_UINT32 x0,
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131 OPJ_UINT32 y0,
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132 OPJ_UINT32 x1,
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133 OPJ_UINT32 y1,
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134 const OPJ_INT32* src,
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135 OPJ_UINT32 src_col_stride,
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136 OPJ_UINT32 src_line_stride,
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137 OPJ_BOOL forgiving);
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138
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139 /*@}*/
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140
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141 #endif /* OPJ_SPARSE_ARRAY_H */