Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/libjpeg/jcmainct.c @ 7:5ab937c03c27

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Apply full RELRO to all generated binaries. Also strip the generated binaries.
author Franz Glasner <fzglas.hg@dom66.de>
date Tue, 16 Sep 2025 12:37:32 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * jcmainct.c
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3 *
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4 * Copyright (C) 1994-1996, Thomas G. Lane.
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5 * Modified 2003-2012 by Guido Vollbeding.
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6 * This file is part of the Independent JPEG Group's software.
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7 * For conditions of distribution and use, see the accompanying README file.
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8 *
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9 * This file contains the main buffer controller for compression.
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10 * The main buffer lies between the pre-processor and the JPEG
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11 * compressor proper; it holds downsampled data in the JPEG colorspace.
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12 */
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14 #define JPEG_INTERNALS
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15 #include "jinclude.h"
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16 #include "jpeglib.h"
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19 /* Note: currently, there is no operating mode in which a full-image buffer
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20 * is needed at this step. If there were, that mode could not be used with
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21 * "raw data" input, since this module is bypassed in that case. However,
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22 * we've left the code here for possible use in special applications.
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23 */
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24 #undef FULL_MAIN_BUFFER_SUPPORTED
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27 /* Private buffer controller object */
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29 typedef struct {
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30 struct jpeg_c_main_controller pub; /* public fields */
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32 JDIMENSION cur_iMCU_row; /* number of current iMCU row */
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33 JDIMENSION rowgroup_ctr; /* counts row groups received in iMCU row */
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34 boolean suspended; /* remember if we suspended output */
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35 J_BUF_MODE pass_mode; /* current operating mode */
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37 /* If using just a strip buffer, this points to the entire set of buffers
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38 * (we allocate one for each component). In the full-image case, this
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39 * points to the currently accessible strips of the virtual arrays.
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40 */
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41 JSAMPARRAY buffer[MAX_COMPONENTS];
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43 #ifdef FULL_MAIN_BUFFER_SUPPORTED
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44 /* If using full-image storage, this array holds pointers to virtual-array
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45 * control blocks for each component. Unused if not full-image storage.
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46 */
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47 jvirt_sarray_ptr whole_image[MAX_COMPONENTS];
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48 #endif
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49 } my_main_controller;
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51 typedef my_main_controller * my_main_ptr;
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54 /* Forward declarations */
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55 METHODDEF(void) process_data_simple_main
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56 JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
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57 JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
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58 #ifdef FULL_MAIN_BUFFER_SUPPORTED
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59 METHODDEF(void) process_data_buffer_main
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60 JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
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61 JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
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62 #endif
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65 /*
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66 * Initialize for a processing pass.
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67 */
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69 METHODDEF(void)
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70 start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
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71 {
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72 my_main_ptr mainp = (my_main_ptr) cinfo->main;
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74 /* Do nothing in raw-data mode. */
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75 if (cinfo->raw_data_in)
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76 return;
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78 mainp->cur_iMCU_row = 0; /* initialize counters */
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79 mainp->rowgroup_ctr = 0;
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80 mainp->suspended = FALSE;
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81 mainp->pass_mode = pass_mode; /* save mode for use by process_data */
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82
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83 switch (pass_mode) {
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84 case JBUF_PASS_THRU:
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85 #ifdef FULL_MAIN_BUFFER_SUPPORTED
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86 if (mainp->whole_image[0] != NULL)
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87 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
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88 #endif
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89 mainp->pub.process_data = process_data_simple_main;
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90 break;
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91 #ifdef FULL_MAIN_BUFFER_SUPPORTED
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92 case JBUF_SAVE_SOURCE:
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93 case JBUF_CRANK_DEST:
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94 case JBUF_SAVE_AND_PASS:
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95 if (mainp->whole_image[0] == NULL)
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96 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
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97 mainp->pub.process_data = process_data_buffer_main;
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98 break;
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99 #endif
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100 default:
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101 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
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102 break;
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103 }
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104 }
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105
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parents:
diff changeset
106
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107 /*
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108 * Process some data.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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109 * This routine handles the simple pass-through mode,
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parents:
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110 * where we have only a strip buffer.
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111 */
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112
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113 METHODDEF(void)
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diff changeset
114 process_data_simple_main (j_compress_ptr cinfo,
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115 JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
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116 JDIMENSION in_rows_avail)
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117 {
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118 my_main_ptr mainp = (my_main_ptr) cinfo->main;
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119
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120 while (mainp->cur_iMCU_row < cinfo->total_iMCU_rows) {
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121 /* Read input data if we haven't filled the main buffer yet */
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122 if (mainp->rowgroup_ctr < (JDIMENSION) cinfo->min_DCT_v_scaled_size)
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123 (*cinfo->prep->pre_process_data) (cinfo,
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124 input_buf, in_row_ctr, in_rows_avail,
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125 mainp->buffer, &mainp->rowgroup_ctr,
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126 (JDIMENSION) cinfo->min_DCT_v_scaled_size);
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127
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128 /* If we don't have a full iMCU row buffered, return to application for
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129 * more data. Note that preprocessor will always pad to fill the iMCU row
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130 * at the bottom of the image.
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131 */
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132 if (mainp->rowgroup_ctr != (JDIMENSION) cinfo->min_DCT_v_scaled_size)
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133 return;
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134
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135 /* Send the completed row to the compressor */
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parents:
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136 if (! (*cinfo->coef->compress_data) (cinfo, mainp->buffer)) {
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parents:
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137 /* If compressor did not consume the whole row, then we must need to
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138 * suspend processing and return to the application. In this situation
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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139 * we pretend we didn't yet consume the last input row; otherwise, if
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140 * it happened to be the last row of the image, the application would
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141 * think we were done.
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142 */
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parents:
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143 if (! mainp->suspended) {
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144 (*in_row_ctr)--;
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145 mainp->suspended = TRUE;
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146 }
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147 return;
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148 }
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149 /* We did finish the row. Undo our little suspension hack if a previous
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150 * call suspended; then mark the main buffer empty.
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151 */
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parents:
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152 if (mainp->suspended) {
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153 (*in_row_ctr)++;
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154 mainp->suspended = FALSE;
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155 }
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diff changeset
156 mainp->rowgroup_ctr = 0;
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parents:
diff changeset
157 mainp->cur_iMCU_row++;
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158 }
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159 }
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160
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parents:
diff changeset
161
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diff changeset
162 #ifdef FULL_MAIN_BUFFER_SUPPORTED
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163
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diff changeset
164 /*
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165 * Process some data.
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parents:
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166 * This routine handles all of the modes that use a full-size buffer.
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parents:
diff changeset
167 */
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parents:
diff changeset
168
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parents:
diff changeset
169 METHODDEF(void)
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parents:
diff changeset
170 process_data_buffer_main (j_compress_ptr cinfo,
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
171 JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
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parents:
diff changeset
172 JDIMENSION in_rows_avail)
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parents:
diff changeset
173 {
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parents:
diff changeset
174 my_main_ptr mainp = (my_main_ptr) cinfo->main;
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parents:
diff changeset
175 int ci;
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diff changeset
176 jpeg_component_info *compptr;
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parents:
diff changeset
177 boolean writing = (mainp->pass_mode != JBUF_CRANK_DEST);
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diff changeset
178
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parents:
diff changeset
179 while (mainp->cur_iMCU_row < cinfo->total_iMCU_rows) {
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
180 /* Realign the virtual buffers if at the start of an iMCU row. */
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parents:
diff changeset
181 if (mainp->rowgroup_ctr == 0) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
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
183 ci++, compptr++) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 mainp->buffer[ci] = (*cinfo->mem->access_virt_sarray)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
185 ((j_common_ptr) cinfo, mainp->whole_image[ci], mainp->cur_iMCU_row *
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
186 ((JDIMENSION) (compptr->v_samp_factor * cinfo->min_DCT_v_scaled_size)),
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parents:
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187 (JDIMENSION) (compptr->v_samp_factor * cinfo->min_DCT_v_scaled_size),
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 writing);
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parents:
diff changeset
189 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 /* In a read pass, pretend we just read some source data. */
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 if (! writing) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 *in_row_ctr += (JDIMENSION)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 (cinfo->max_v_samp_factor * cinfo->min_DCT_v_scaled_size);
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
194 mainp->rowgroup_ctr = (JDIMENSION) cinfo->min_DCT_v_scaled_size;
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
195 }
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
196 }
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
197
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
198 /* If a write pass, read input data until the current iMCU row is full. */
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
199 /* Note: preprocessor will pad if necessary to fill the last iMCU row. */
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
200 if (writing) {
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
201 (*cinfo->prep->pre_process_data) (cinfo,
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
202 input_buf, in_row_ctr, in_rows_avail,
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
203 mainp->buffer, &mainp->rowgroup_ctr,
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
204 (JDIMENSION) cinfo->min_DCT_v_scaled_size);
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
205 /* Return to application if we need more data to fill the iMCU row. */
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
206 if (mainp->rowgroup_ctr < (JDIMENSION) cinfo->min_DCT_v_scaled_size)
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
207 return;
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
208 }
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
209
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
210 /* Emit data, unless this is a sink-only pass. */
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
211 if (mainp->pass_mode != JBUF_SAVE_SOURCE) {
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
212 if (! (*cinfo->coef->compress_data) (cinfo, mainp->buffer)) {
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
213 /* If compressor did not consume the whole row, then we must need to
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
214 * suspend processing and return to the application. In this situation
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
215 * we pretend we didn't yet consume the last input row; otherwise, if
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
216 * it happened to be the last row of the image, the application would
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
217 * think we were done.
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
218 */
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
219 if (! mainp->suspended) {
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
220 (*in_row_ctr)--;
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
221 mainp->suspended = TRUE;
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
222 }
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
223 return;
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
224 }
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
225 /* We did finish the row. Undo our little suspension hack if a previous
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
226 * call suspended; then mark the main buffer empty.
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
227 */
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
228 if (mainp->suspended) {
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
229 (*in_row_ctr)++;
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
230 mainp->suspended = FALSE;
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
231 }
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
232 }
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
233
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
234 /* If get here, we are done with this iMCU row. Mark buffer empty. */
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
235 mainp->rowgroup_ctr = 0;
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
236 mainp->cur_iMCU_row++;
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
237 }
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
238 }
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
239
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
240 #endif /* FULL_MAIN_BUFFER_SUPPORTED */
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
241
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
242
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
243 /*
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
244 * Initialize main buffer controller.
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
245 */
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
246
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
247 GLOBAL(void)
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
248 jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer)
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
249 {
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
250 my_main_ptr mainp;
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
251 int ci;
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
252 jpeg_component_info *compptr;
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
253
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
254 mainp = (my_main_ptr)
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
255 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
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
256 SIZEOF(my_main_controller));
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
257 cinfo->main = &mainp->pub;
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
258 mainp->pub.start_pass = start_pass_main;
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
259
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
260 /* We don't need to create a buffer in raw-data mode. */
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
261 if (cinfo->raw_data_in)
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
262 return;
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
263
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
264 /* Create the buffer. It holds downsampled data, so each component
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
265 * may be of a different size.
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
266 */
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
267 if (need_full_buffer) {
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
268 #ifdef FULL_MAIN_BUFFER_SUPPORTED
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
269 /* Allocate a full-image virtual array for each component */
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
270 /* Note we pad the bottom to a multiple of the iMCU height */
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
271 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
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
272 ci++, compptr++) {
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
273 mainp->whole_image[ci] = (*cinfo->mem->request_virt_sarray)
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
274 ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
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
275 compptr->width_in_blocks * ((JDIMENSION) compptr->DCT_h_scaled_size),
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
276 ((JDIMENSION) jround_up((long) compptr->height_in_blocks,
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
277 (long) compptr->v_samp_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
278 ((JDIMENSION) cinfo->min_DCT_v_scaled_size),
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
279 (JDIMENSION) (compptr->v_samp_factor * compptr->DCT_v_scaled_size));
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
280 }
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 #else
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 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
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 #endif
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 } else {
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 #ifdef FULL_MAIN_BUFFER_SUPPORTED
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
286 mainp->whole_image[0] = NULL; /* flag for no virtual arrays */
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
287 #endif
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
288 /* Allocate a strip buffer for each component */
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 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
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
290 ci++, compptr++) {
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
291 mainp->buffer[ci] = (*cinfo->mem->alloc_sarray)
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 ((j_common_ptr) cinfo, JPOOL_IMAGE,
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 compptr->width_in_blocks * ((JDIMENSION) compptr->DCT_h_scaled_size),
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 (JDIMENSION) (compptr->v_samp_factor * compptr->DCT_v_scaled_size));
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
295 }
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.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
297 }