Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/libjpeg/jcinit.c @ 20:eb3dd22fef2c

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FIX: the new "sdist" build target is PHONY also
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 22:04:13 +0200
parents b50eed0cc0ef
children
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2
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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1 /*
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2 * jcinit.c
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3 *
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4 * Copyright (C) 1991-1997, Thomas G. Lane.
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5 * Modified 2003-2017 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 initialization logic for the JPEG compressor.
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10 * This routine is in charge of selecting the modules to be executed and
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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11 * making an initialization call to each one.
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12 *
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13 * Logically, this code belongs in jcmaster.c. It's split out because
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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14 * linking this routine implies linking the entire compression library.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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15 * For a transcoding-only application, we want to be able to use jcmaster.c
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16 * without linking in the whole library.
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17 */
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18
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19 #define JPEG_INTERNALS
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20 #include "jinclude.h"
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21 #include "jpeglib.h"
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22
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23
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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24 /*
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25 * Compute JPEG image dimensions and related values.
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26 * NOTE: this is exported for possible use by application.
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27 * Hence it mustn't do anything that can't be done twice.
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28 */
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29
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30 GLOBAL(void)
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31 jpeg_calc_jpeg_dimensions (j_compress_ptr cinfo)
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32 /* Do computations that are needed before master selection phase */
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33 {
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34 /* Sanity check on input image dimensions to prevent overflow in
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35 * following calculations.
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36 * We do check jpeg_width and jpeg_height in initial_setup in jcmaster.c,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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37 * but image_width and image_height can come from arbitrary 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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38 * and we need some space for multiplication by block_size.
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39 */
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40 if (((long) cinfo->image_width >> 24) || ((long) cinfo->image_height >> 24))
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41 ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION);
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42
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43 #ifdef DCT_SCALING_SUPPORTED
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44
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45 /* Compute actual JPEG image dimensions and DCT scaling choices. */
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46 if (cinfo->scale_num >= cinfo->scale_denom * cinfo->block_size) {
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47 /* Provide block_size/1 scaling */
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48 cinfo->jpeg_width = cinfo->image_width * cinfo->block_size;
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49 cinfo->jpeg_height = cinfo->image_height * cinfo->block_size;
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50 cinfo->min_DCT_h_scaled_size = 1;
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51 cinfo->min_DCT_v_scaled_size = 1;
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52 } else if (cinfo->scale_num * 2 >= cinfo->scale_denom * cinfo->block_size) {
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53 /* Provide block_size/2 scaling */
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54 cinfo->jpeg_width = (JDIMENSION)
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55 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 2L);
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56 cinfo->jpeg_height = (JDIMENSION)
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57 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 2L);
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58 cinfo->min_DCT_h_scaled_size = 2;
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59 cinfo->min_DCT_v_scaled_size = 2;
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60 } else if (cinfo->scale_num * 3 >= cinfo->scale_denom * cinfo->block_size) {
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61 /* Provide block_size/3 scaling */
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62 cinfo->jpeg_width = (JDIMENSION)
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63 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 3L);
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64 cinfo->jpeg_height = (JDIMENSION)
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65 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 3L);
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66 cinfo->min_DCT_h_scaled_size = 3;
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67 cinfo->min_DCT_v_scaled_size = 3;
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68 } else if (cinfo->scale_num * 4 >= cinfo->scale_denom * cinfo->block_size) {
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69 /* Provide block_size/4 scaling */
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70 cinfo->jpeg_width = (JDIMENSION)
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71 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 4L);
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72 cinfo->jpeg_height = (JDIMENSION)
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73 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 4L);
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74 cinfo->min_DCT_h_scaled_size = 4;
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75 cinfo->min_DCT_v_scaled_size = 4;
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76 } else if (cinfo->scale_num * 5 >= cinfo->scale_denom * cinfo->block_size) {
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77 /* Provide block_size/5 scaling */
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78 cinfo->jpeg_width = (JDIMENSION)
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79 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 5L);
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80 cinfo->jpeg_height = (JDIMENSION)
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81 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 5L);
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82 cinfo->min_DCT_h_scaled_size = 5;
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83 cinfo->min_DCT_v_scaled_size = 5;
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84 } else if (cinfo->scale_num * 6 >= cinfo->scale_denom * cinfo->block_size) {
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85 /* Provide block_size/6 scaling */
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86 cinfo->jpeg_width = (JDIMENSION)
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87 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 6L);
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88 cinfo->jpeg_height = (JDIMENSION)
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89 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 6L);
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90 cinfo->min_DCT_h_scaled_size = 6;
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91 cinfo->min_DCT_v_scaled_size = 6;
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92 } else if (cinfo->scale_num * 7 >= cinfo->scale_denom * cinfo->block_size) {
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diff changeset
93 /* Provide block_size/7 scaling */
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
94 cinfo->jpeg_width = (JDIMENSION)
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
95 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 7L);
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
96 cinfo->jpeg_height = (JDIMENSION)
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
97 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 7L);
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
98 cinfo->min_DCT_h_scaled_size = 7;
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
99 cinfo->min_DCT_v_scaled_size = 7;
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 } else if (cinfo->scale_num * 8 >= cinfo->scale_denom * cinfo->block_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
101 /* Provide block_size/8 scaling */
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
102 cinfo->jpeg_width = (JDIMENSION)
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
103 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 8L);
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 cinfo->jpeg_height = (JDIMENSION)
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 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 8L);
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
106 cinfo->min_DCT_h_scaled_size = 8;
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
107 cinfo->min_DCT_v_scaled_size = 8;
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
108 } else if (cinfo->scale_num * 9 >= cinfo->scale_denom * cinfo->block_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
109 /* Provide block_size/9 scaling */
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 cinfo->jpeg_width = (JDIMENSION)
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
111 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 9L);
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
112 cinfo->jpeg_height = (JDIMENSION)
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
113 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 9L);
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
114 cinfo->min_DCT_h_scaled_size = 9;
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
115 cinfo->min_DCT_v_scaled_size = 9;
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
116 } else if (cinfo->scale_num * 10 >= cinfo->scale_denom * cinfo->block_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
117 /* Provide block_size/10 scaling */
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
118 cinfo->jpeg_width = (JDIMENSION)
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
119 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 10L);
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
120 cinfo->jpeg_height = (JDIMENSION)
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
121 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 10L);
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
122 cinfo->min_DCT_h_scaled_size = 10;
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
123 cinfo->min_DCT_v_scaled_size = 10;
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
124 } else if (cinfo->scale_num * 11 >= cinfo->scale_denom * cinfo->block_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
125 /* Provide block_size/11 scaling */
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
126 cinfo->jpeg_width = (JDIMENSION)
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
127 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 11L);
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
128 cinfo->jpeg_height = (JDIMENSION)
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
129 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 11L);
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
130 cinfo->min_DCT_h_scaled_size = 11;
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
131 cinfo->min_DCT_v_scaled_size = 11;
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
132 } else if (cinfo->scale_num * 12 >= cinfo->scale_denom * cinfo->block_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
133 /* Provide block_size/12 scaling */
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
134 cinfo->jpeg_width = (JDIMENSION)
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
135 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 12L);
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
136 cinfo->jpeg_height = (JDIMENSION)
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
137 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 12L);
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
138 cinfo->min_DCT_h_scaled_size = 12;
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
139 cinfo->min_DCT_v_scaled_size = 12;
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
140 } else if (cinfo->scale_num * 13 >= cinfo->scale_denom * cinfo->block_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
141 /* Provide block_size/13 scaling */
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
142 cinfo->jpeg_width = (JDIMENSION)
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
143 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 13L);
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
144 cinfo->jpeg_height = (JDIMENSION)
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
145 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 13L);
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
146 cinfo->min_DCT_h_scaled_size = 13;
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
147 cinfo->min_DCT_v_scaled_size = 13;
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
148 } else if (cinfo->scale_num * 14 >= cinfo->scale_denom * cinfo->block_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
149 /* Provide block_size/14 scaling */
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
150 cinfo->jpeg_width = (JDIMENSION)
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
151 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 14L);
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
152 cinfo->jpeg_height = (JDIMENSION)
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
153 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 14L);
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
154 cinfo->min_DCT_h_scaled_size = 14;
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
155 cinfo->min_DCT_v_scaled_size = 14;
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
156 } else if (cinfo->scale_num * 15 >= cinfo->scale_denom * cinfo->block_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
157 /* Provide block_size/15 scaling */
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
158 cinfo->jpeg_width = (JDIMENSION)
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
159 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 15L);
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
160 cinfo->jpeg_height = (JDIMENSION)
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
161 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 15L);
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
162 cinfo->min_DCT_h_scaled_size = 15;
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
163 cinfo->min_DCT_v_scaled_size = 15;
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
164 } 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
165 /* Provide block_size/16 scaling */
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
166 cinfo->jpeg_width = (JDIMENSION)
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
167 jdiv_round_up((long) cinfo->image_width * cinfo->block_size, 16L);
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
168 cinfo->jpeg_height = (JDIMENSION)
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
169 jdiv_round_up((long) cinfo->image_height * cinfo->block_size, 16L);
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
170 cinfo->min_DCT_h_scaled_size = 16;
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
171 cinfo->min_DCT_v_scaled_size = 16;
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
172 }
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
173
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
174 #else /* !DCT_SCALING_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
175
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
176 /* Hardwire it to "no scaling" */
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
177 cinfo->jpeg_width = cinfo->image_width;
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
178 cinfo->jpeg_height = cinfo->image_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
179 cinfo->min_DCT_h_scaled_size = DCTSIZE;
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
180 cinfo->min_DCT_v_scaled_size = DCTSIZE;
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
181
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
182 #endif /* DCT_SCALING_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
183 }
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
184
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
185
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186 /*
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187 * Master selection of compression modules.
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188 * This is done once at the start of processing an image. We determine
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189 * which modules will be used and give them appropriate initialization calls.
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190 */
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191
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192 GLOBAL(void)
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193 jinit_compress_master (j_compress_ptr cinfo)
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194 {
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195 long samplesperrow;
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196 JDIMENSION jd_samplesperrow;
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197
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198 /* For now, precision must match compiled-in value... */
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199 if (cinfo->data_precision != BITS_IN_JSAMPLE)
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200 ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
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201
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202 /* Sanity check on input image dimensions */
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203 if (cinfo->image_height <= 0 || cinfo->image_width <= 0 ||
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204 cinfo->input_components <= 0)
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205 ERREXIT(cinfo, JERR_EMPTY_IMAGE);
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206
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207 /* Width of an input scanline must be representable as JDIMENSION. */
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208 samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components;
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209 jd_samplesperrow = (JDIMENSION) samplesperrow;
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210 if ((long) jd_samplesperrow != samplesperrow)
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211 ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
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212
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213 /* Compute JPEG image dimensions and related values. */
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214 jpeg_calc_jpeg_dimensions(cinfo);
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215
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216 /* Initialize master control (includes parameter checking/processing) */
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217 jinit_c_master_control(cinfo, FALSE /* full compression */);
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218
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219 /* Preprocessing */
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220 if (! cinfo->raw_data_in) {
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221 jinit_color_converter(cinfo);
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222 jinit_downsampler(cinfo);
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223 jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
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224 }
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225 /* Forward DCT */
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226 jinit_forward_dct(cinfo);
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227 /* Entropy encoding: either Huffman or arithmetic coding. */
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228 if (cinfo->arith_code)
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229 jinit_arith_encoder(cinfo);
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230 else {
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231 jinit_huff_encoder(cinfo);
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232 }
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233
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234 /* Need a full-image coefficient buffer in any multi-pass mode. */
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235 jinit_c_coef_controller(cinfo,
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236 (boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
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237 jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
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238
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239 jinit_marker_writer(cinfo);
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240
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241 /* We can now tell the memory manager to allocate virtual arrays. */
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242 (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
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243
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244 /* Write the datastream header (SOI) immediately.
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245 * Frame and scan headers are postponed till later.
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246 * This lets application insert special markers after the SOI.
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247 */
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248 (*cinfo->marker->write_file_header) (cinfo);
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249 }