3 The tool to see difference between two images hidden iside one indexed image
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6 Copyright (C) 2015, 2022 Balthasar Szczepański
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8 This program is free software: you can redistribute it and/or modify
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9 it under the terms of the GNU Affero General Public License as
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10 published by the Free Software Foundation, either version 3 of the
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11 License, or (at your option) any later version.
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13 This program is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU Affero General Public License for more details.
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18 You should have received a copy of the GNU Affero General Public License
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19 along with this program. If not, see <http://www.gnu.org/licenses/>.
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22 Requires Dev Image Library (libdevil) (http://openil.sourceforge.net/)
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23 on Pentium III libdevil must be recompiled with
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24 --disable-ssl2 --disable-ssl3
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25 (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=572954)
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34 #include "pal_mixdiff.h"
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36 int palette_mixdiff_index (ILuint n, struct PixelInfo *p, void *data);
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38 char PAL_MIXDIFF_MISSING_ARGS[] = "Missing parameters.\npal_mixdiff inPix outPix [n1 n2]\n";
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40 int subtool_pal_mixdiff (int argc, char **argv, int argi, char **err)
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42 struct IL_full_info info;
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43 FLAG_TYPE flags = MUST_BE_INDEXED | CAN_BE_MULTIPLE;
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44 ILubyte new_pal[0x100 * 4];
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48 uint_fast8_t size_defined = 0;
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50 ILuint max_index = 0;
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53 if (argc < argi + 2)
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55 *err = PAL_MIXDIFF_MISSING_ARGS;
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59 if (argc >= argi + 4)
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61 sscanf(argv[argi+2],"%u",&n0);
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62 sscanf(argv[argi+3],"%u",&n1);
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67 r = reserve_pictures(1);
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70 *err = CREATE_FAILED;
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74 r = load_picture(0, argv[argi], &info, &flags);
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83 if (info.palette_num_cols < n)
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85 *err = BAD_PALETTE_SIZE;
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91 n = info.palette_num_cols;
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95 *err = BAD_PALETTE_SIZE;
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101 /* inefficiently find max index */
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102 for (i=0; i<n0; ++i)
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104 for (j=0; j<n1; ++j)
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112 /* create palettes - I didn't define separate action of this type */
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114 for (i=0; i<=info.num_images; ++i)
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116 r = get_palette(0, &pal, i);
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119 *err = CONVERT_FAILED;
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124 for (j=0; j<=max_index; ++j)
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126 rd = pal + ((2*(j*(n-1))+1)/(2*max_index)) * info.palette_bpp;
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127 for (k=0; k<info.palette_bpp; ++k)
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138 (max_index+1) * info.palette_bpp,
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144 *err = CONVERT_FAILED;
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149 r = perform_action_1picture(
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153 &palette_mixdiff_index,
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159 *err = CONVERT_FAILED;
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163 r = save_picture(0, argv[argi+1], flags);
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166 *err = SAVE_FAILED;
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173 int palette_mixdiff_index (ILuint n, struct PixelInfo *p, void *data)
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177 p->index = (p->index / *d) ^ (p->index % *d);
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