Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/leptonica/src/pixacc.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 /*====================================================================*
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2 - Copyright (C) 2001 Leptonica. All rights reserved.
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3 -
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4 - Redistribution and use in source and binary forms, with or without
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5 - modification, are permitted provided that the following conditions
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6 - are met:
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7 - 1. Redistributions of source code must retain the above copyright
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8 - notice, this list of conditions and the following disclaimer.
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9 - 2. Redistributions in binary form must reproduce the above
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10 - copyright notice, this list of conditions and the following
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11 - disclaimer in the documentation and/or other materials
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12 - provided with the distribution.
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13 -
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14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
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18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 *====================================================================*/
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27 /*!
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28 * \file pixacc.c
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29 * <pre>
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30 *
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31 * Pixacc creation, destruction
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32 * PIXACC *pixaccCreate()
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33 * PIXACC *pixaccCreateFromPix()
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34 * void pixaccDestroy()
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35 *
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36 * Pixacc finalization
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37 * PIX *pixaccFinal()
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38 *
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39 * Pixacc accessors
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40 * PIX *pixaccGetPix()
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41 * l_int32 pixaccGetOffset()
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42 *
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43 * Pixacc accumulators
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44 * l_int32 pixaccAdd()
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45 * l_int32 pixaccSubtract()
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46 * l_int32 pixaccMultConst()
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47 * l_int32 pixaccMultConstAccumulate()
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48 *
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49 * This is a simple interface for some of the pixel arithmetic operations
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50 * in pixarith.c. These are easy to code up, but not as fast as
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51 * hand-coded functions that do arithmetic on corresponding pixels.
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52 *
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53 * Suppose you want to make a linear combination of pix1 and pix2:
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54 * pixd = 0.4 * pix1 + 0.6 * pix2
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55 * where pix1 and pix2 are the same size and have depth 'd'. Then:
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56 * Pixacc *pacc = pixaccCreateFromPix(pix1, 0); // first; addition only
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57 * pixaccMultConst(pacc, 0.4);
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58 * pixaccMultConstAccumulate(pacc, pix2, 0.6); // Add in 0.6 of the second
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59 * pixd = pixaccFinal(pacc, d); // Get the result
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60 * pixaccDestroy(&pacc);
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61 * </pre>
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62 */
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63
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64 #ifdef HAVE_CONFIG_H
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65 #include <config_auto.h>
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66 #endif /* HAVE_CONFIG_H */
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67
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68 #include "allheaders.h"
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69 #include "pix_internal.h"
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70
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71 /*---------------------------------------------------------------------*
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72 * Pixacc creation, destruction *
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73 *---------------------------------------------------------------------*/
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74 /*!
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75 * \brief pixaccCreate()
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76 *
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77 * \param[in] w, h of 32 bpp internal Pix
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78 * \param[in] negflag 0 if only positive numbers are involved;
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79 * 1 if there will be negative numbers
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80 * \return pixacc, or NULL on error
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81 *
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82 * <pre>
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83 * Notes:
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84 * (1) Use %negflag = 1 for safety if any negative numbers are going
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85 * to be used in the chain of operations. Negative numbers
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86 * arise, e.g., by subtracting a pix, or by adding a pix
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87 * that has been pre-multiplied by a negative number.
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88 * (2) Initializes the internal 32 bpp pix, similarly to the
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89 * initialization in pixInitAccumulate().
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90 * </pre>
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91 */
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92 PIXACC *
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93 pixaccCreate(l_int32 w,
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94 l_int32 h,
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95 l_int32 negflag)
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96 {
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97 PIXACC *pixacc;
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98
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99 pixacc = (PIXACC *)LEPT_CALLOC(1, sizeof(PIXACC));
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 pixacc->w = w;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
101 pixacc->h = h;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
102
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parents:
diff changeset
103 if ((pixacc->pix = pixCreate(w, h, 32)) == NULL) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 pixaccDestroy(&pixacc);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 return (PIXACC *)ERROR_PTR("pix not made", __func__, NULL);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
106 }
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parents:
diff changeset
107
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 if (negflag) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109 pixacc->offset = 0x40000000;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
110 pixSetAllArbitrary(pixacc->pix, pixacc->offset);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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111 }
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112
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parents:
diff changeset
113 return pixacc;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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114 }
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115
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parents:
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116
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diff changeset
117 /*!
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118 * \brief pixaccCreateFromPix()
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119 *
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120 * \param[in] pix
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121 * \param[in] negflag 0 if only positive numbers are involved;
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122 * 1 if there will be negative numbers
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123 * \return pixacc, or NULL on error
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124 *
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parents:
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125 * <pre>
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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126 * Notes:
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127 * (1) See pixaccCreate()
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128 * </pre>
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129 */
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parents:
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130 PIXACC *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
131 pixaccCreateFromPix(PIX *pix,
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parents:
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132 l_int32 negflag)
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parents:
diff changeset
133 {
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parents:
diff changeset
134 l_int32 w, h;
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parents:
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135 PIXACC *pixacc;
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parents:
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136
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 if (!pix)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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138 return (PIXACC *)ERROR_PTR("pix not defined", __func__, NULL);
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parents:
diff changeset
139
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parents:
diff changeset
140 pixGetDimensions(pix, &w, &h, NULL);
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parents:
diff changeset
141 pixacc = pixaccCreate(w, h, negflag);
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parents:
diff changeset
142 pixaccAdd(pixacc, pix);
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parents:
diff changeset
143 return pixacc;
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diff changeset
144 }
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parents:
diff changeset
145
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parents:
diff changeset
146
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
147 /*!
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148 * \brief pixaccDestroy()
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parents:
diff changeset
149 *
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150 * \param[in,out] ppixacc will be set to null before returning
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parents:
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151 * \return void
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parents:
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152 *
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parents:
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153 * <pre>
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parents:
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154 * Notes:
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parents:
diff changeset
155 * (1) Always nulls the input ptr.
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parents:
diff changeset
156 * </pre>
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parents:
diff changeset
157 */
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parents:
diff changeset
158 void
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parents:
diff changeset
159 pixaccDestroy(PIXACC **ppixacc)
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parents:
diff changeset
160 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
161 PIXACC *pixacc;
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parents:
diff changeset
162
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parents:
diff changeset
163 if (ppixacc == NULL) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
164 L_WARNING("ptr address is NULL!", __func__);
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parents:
diff changeset
165 return;
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parents:
diff changeset
166 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
168 if ((pixacc = *ppixacc) == NULL)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
169 return;
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parents:
diff changeset
170
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parents:
diff changeset
171 pixDestroy(&pixacc->pix);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 LEPT_FREE(pixacc);
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parents:
diff changeset
173 *ppixacc = NULL;
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parents:
diff changeset
174 }
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parents:
diff changeset
175
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
176
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177 /*---------------------------------------------------------------------*
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parents:
diff changeset
178 * Pixacc finalization *
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parents:
diff changeset
179 *---------------------------------------------------------------------*/
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
180 /*!
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parents:
diff changeset
181 * \brief pixaccFinal()
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 *
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parents:
diff changeset
183 * \param[in] pixacc
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parents:
diff changeset
184 * \param[in] outdepth 8, 16 or 32 bpp
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diff changeset
185 * \return pixd 8, 16 or 32 bpp, or NULL on error
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parents:
diff changeset
186 */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
187 PIX *
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parents:
diff changeset
188 pixaccFinal(PIXACC *pixacc,
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parents:
diff changeset
189 l_int32 outdepth)
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parents:
diff changeset
190 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 if (!pixacc)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
192 return (PIX *)ERROR_PTR("pixacc not defined", __func__, NULL);
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parents:
diff changeset
193
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parents:
diff changeset
194 return pixFinalAccumulate(pixaccGetPix(pixacc), pixaccGetOffset(pixacc),
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
195 outdepth);
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parents:
diff changeset
196 }
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parents:
diff changeset
197
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
198
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
199 /*---------------------------------------------------------------------*
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
200 * Pixacc accessors *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
201 *---------------------------------------------------------------------*/
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
202 /*!
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
203 * \brief pixaccGetPix()
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
204 *
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205 * \param[in] pixacc
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diff changeset
206 * \return pix, or NULL on error
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parents:
diff changeset
207 */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
208 PIX *
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parents:
diff changeset
209 pixaccGetPix(PIXACC *pixacc)
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parents:
diff changeset
210 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
211 if (!pixacc)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
212 return (PIX *)ERROR_PTR("pixacc not defined", __func__, NULL);
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parents:
diff changeset
213 return pixacc->pix;
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diff changeset
214 }
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diff changeset
215
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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216
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parents:
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217 /*!
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diff changeset
218 * \brief pixaccGetOffset()
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219 *
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220 * \param[in] pixacc
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parents:
diff changeset
221 * \return offset, or -1 on error
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parents:
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222 */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
223 l_int32
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parents:
diff changeset
224 pixaccGetOffset(PIXACC *pixacc)
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parents:
diff changeset
225 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
226 if (!pixacc)
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diff changeset
227 return ERROR_INT("pixacc not defined", __func__, -1);
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228 return pixacc->offset;
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229 }
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230
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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231
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232 /*---------------------------------------------------------------------*
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233 * Pixacc accumulators *
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234 *---------------------------------------------------------------------*/
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235 /*!
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diff changeset
236 * \brief pixaccAdd()
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237 *
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238 * \param[in] pixacc
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diff changeset
239 * \param[in] pix to be added
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240 * \return 0 if OK, 1 on error
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parents:
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241 */
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parents:
diff changeset
242 l_ok
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parents:
diff changeset
243 pixaccAdd(PIXACC *pixacc,
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diff changeset
244 PIX *pix)
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245 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
246 if (!pixacc)
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diff changeset
247 return ERROR_INT("pixacc not defined", __func__, 1);
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diff changeset
248 if (!pix)
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diff changeset
249 return ERROR_INT("pix not defined", __func__, 1);
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diff changeset
250 pixAccumulate(pixaccGetPix(pixacc), pix, L_ARITH_ADD);
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diff changeset
251 return 0;
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parents:
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252 }
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253
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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254
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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255 /*!
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256 * \brief pixaccSubtract()
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257 *
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258 * \param[in] pixacc
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parents:
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259 * \param[in] pix to be subtracted
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260 * \return 0 if OK, 1 on error
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parents:
diff changeset
261 */
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parents:
diff changeset
262 l_ok
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parents:
diff changeset
263 pixaccSubtract(PIXACC *pixacc,
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parents:
diff changeset
264 PIX *pix)
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parents:
diff changeset
265 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
266 if (!pixacc)
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parents:
diff changeset
267 return ERROR_INT("pixacc not defined", __func__, 1);
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parents:
diff changeset
268 if (!pix)
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parents:
diff changeset
269 return ERROR_INT("pix not defined", __func__, 1);
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parents:
diff changeset
270 pixAccumulate(pixaccGetPix(pixacc), pix, L_ARITH_SUBTRACT);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
271 return 0;
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parents:
diff changeset
272 }
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parents:
diff changeset
273
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
274
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
275 /*!
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parents:
diff changeset
276 * \brief pixaccMultConst()
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parents:
diff changeset
277 *
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parents:
diff changeset
278 * \param[in] pixacc
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parents:
diff changeset
279 * \param[in] factor
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
280 * \return 0 if OK, 1 on error
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
281 */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
282 l_ok
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
283 pixaccMultConst(PIXACC *pixacc,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
284 l_float32 factor)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
285 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
286 if (!pixacc)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
287 return ERROR_INT("pixacc not defined", __func__, 1);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
288 pixMultConstAccumulate(pixaccGetPix(pixacc), factor,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
289 pixaccGetOffset(pixacc));
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parents:
diff changeset
290 return 0;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
291 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
292
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
293
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
294 /*!
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
295 * \brief pixaccMultConstAccumulate()
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
296 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
297 * \param[in] pixacc
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
298 * \param[in] pix
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
299 * \param[in] factor
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
300 * \return 0 if OK, 1 on error
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
301 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
302 * <pre>
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
303 * Notes:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
304 * (1) This creates a temp pix that is %pix multiplied by the
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
305 * constant %factor. It then adds that into %pixacc.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
306 * </pre>
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
307 */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
308 l_ok
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
309 pixaccMultConstAccumulate(PIXACC *pixacc,
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parents:
diff changeset
310 PIX *pix,
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parents:
diff changeset
311 l_float32 factor)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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312 {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
313 l_int32 w, h, d, negflag;
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parents:
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314 PIX *pixt;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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315 PIXACC *pacct;
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parents:
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316
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
317 if (!pixacc)
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parents:
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318 return ERROR_INT("pixacc not defined", __func__, 1);
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parents:
diff changeset
319 if (!pix)
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parents:
diff changeset
320 return ERROR_INT("pix not defined", __func__, 1);
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parents:
diff changeset
321
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
322 if (factor == 0.0) return 0;
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parents:
diff changeset
323
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
324 pixGetDimensions(pix, &w, &h, &d);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
325 negflag = (factor > 0.0) ? 0 : 1;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
326 pacct = pixaccCreate(w, h, negflag);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
327 pixaccAdd(pacct, pix);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
328 pixaccMultConst(pacct, factor);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
329 pixt = pixaccFinal(pacct, d);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
330 pixaccAdd(pixacc, pixt);
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parents:
diff changeset
331
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
332 pixaccDestroy(&pacct);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
333 pixDestroy(&pixt);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
334 return 0;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
335 }