Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/lcms2/utils/samples/roundtrip.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 // Little cms
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3 // Copyright (C) 1998-2011 Marti Maria
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4 //
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5 // Permission is hereby granted, free of charge, to any person obtaining
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6 // a copy of this software and associated documentation files (the "Software"),
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7 // to deal in the Software without restriction, including without limitation
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8 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
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9 // and/or sell copies of the Software, and to permit persons to whom the Software
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10 // is furnished to do so, subject to the following conditions:
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11 //
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12 // The above copyright notice and this permission notice shall be included in
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13 // all copies or substantial portions of the Software.
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14 //
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15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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17 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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22 #include "lcms2mt.h"
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23 #include <math.h>
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27 static
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28 double VecDist(cmsUInt8Number bin[3], cmsUInt8Number bout[3])
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29 {
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30 double rdist, gdist, bdist;
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32 rdist = fabs((double) bout[0] - bin[0]);
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33 gdist = fabs((double) bout[1] - bin[1]);
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34 bdist = fabs((double) bout[2] - bin[2]);
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36 return (sqrt((rdist*rdist + gdist*gdist + bdist*bdist)));
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37 }
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40 int main(int argc, char* argv[])
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41 {
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43 int r, g, b;
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44 cmsUInt8Number RGB[3], RGB_OUT[3];
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45 cmsHTRANSFORM xform;
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46 cmsHPROFILE hProfile;
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47 double err, SumX=0, SumX2=0, Peak = 0, n = 0;
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50 if (argc != 2) {
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51 printf("roundtrip <RGB icc profile>\n");
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52 return 1;
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53 }
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55 hProfile = cmsOpenProfileFromFile(argv[1], "r");
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56 if (hProfile == NULL)
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57 {
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58 printf("invalid profile\n");
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59 return 1;
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60 }
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62 xform = cmsCreateTransform(hProfile,TYPE_RGB_8, hProfile, TYPE_RGB_8, INTENT_RELATIVE_COLORIMETRIC, cmsFLAGS_NOOPTIMIZE);
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63 if (xform == NULL)
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64 {
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65 printf("Not a valid RGB profile\n");
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66 return 1;
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67 }
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69 for (r=0; r< 256; r++) {
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70 printf("%d \r", r);
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71 for (g=0; g < 256; g++) {
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72 for (b=0; b < 256; b++) {
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74 RGB[0] = r;
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75 RGB[1] = g;
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76 RGB[2] = b;
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78 cmsDoTransform(xform, RGB, RGB_OUT, 1);
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80 err = VecDist(RGB, RGB_OUT);
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82 SumX += err;
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83 SumX2 += err * err;
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84 n += 1.0;
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85 if (err > Peak)
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86 Peak = err;
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88 }
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89 }
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90 }
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92 printf("Average %g\n", SumX / n);
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93 printf("Max %g\n", Peak);
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94 printf("Std %g\n", sqrt((n*SumX2 - SumX * SumX) / (n*(n-1))));
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95 cmsCloseProfile(hProfile);
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96 cmsDeleteTransform(xform);
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98 return 0;
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99 }