FreeCalypso > hg > freecalypso-tools

annotate miscutil/fc-rgbconv.c @ 964:a96cb97b66a2

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ringtools/imy: fix duplicate definition of tdma_durations[] The bug was reported by Vadim Yanitskiy <fixeria@osmocom.org>, although the present fix is slightly different from the contributed patch: because main.c doesn't need this tdma_durations[] array at all, let's simply remove the reference to this array from main.c rather than turn it into an extern. I no longer remember my original thought flow that resulted (by mistake) in tdma_durations[] being multiply defined in main.c and durations.c. My intent might have been to define all globals in main.c and have the reference in durations.c be an extern - and I missed that extern - but without clear memory, I have no certainty. In any case, having this data array defined in the same module that fills it (durations.c) is sensible, so let's make it the new way.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 31 Aug 2023 19:38:18 +0000
parents e7502631a0f9
children
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1 /*
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2 * This utility is an aid for phone UI development. The color LCDs in the
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3 * phones targeted by FreeCalypso implement 16-bit color in RGB 5:6:5 format,
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4 * but these 16-bit color words are not particularly intuitive in raw hex form.
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5 * In contrast, a 24-bit RGB 8:8:8 color given in RRGGBB hex form is quite
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6 * intuitive, at least to those who understand RGB.
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7 *
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8 * This utility performs the conversion. It takes a single command line
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9 * argument that must be either 4 or 6 hex digits. If the argument is 4 hex
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10 * digits, it is interpreted as RGB 5:6:5 and converted into RGB 8:8:8.
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11 * If the argument is 6 hex digits, it is interpreted as RGB 8:8:8 and
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12 * converted into RGB 5:6:5. The output of the conversion is emitted on
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13 * stdout as 4 or 6 hex digits.
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14 */
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15
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16 #include <stdio.h>
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17 #include <stdlib.h>
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18 #include <ctype.h>
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19 #include <string.h>
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20
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21 is_arg_all_hex(str)
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22 char *str;
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23 {
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24 char *cp;
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25 int c;
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26
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27 for (cp = str; c = *cp++; )
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28 if (!isxdigit(c))
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29 return(0);
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30 return(1);
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31 }
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32
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33 convert_565_to_888(in)
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34 unsigned in;
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35 {
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36 unsigned r, g, b;
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37
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38 r = in >> 11;
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39 g = (in >> 5) & 0x3F;
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40 b = in & 0x1F;
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41 printf("%02X%02X%02X\n", r << 3, g << 2, b << 3);
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42 }
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43
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44 convert_888_to_565(in)
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45 unsigned in;
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46 {
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47 unsigned r, g, b;
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48
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49 r = (in >> 16) >> 3;
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50 g = ((in >> 8) & 0xFF) >> 2;
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51 b = (in & 0xFF) >> 3;
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52 printf("%04X\n", (r << 11) | (g << 5) | b);
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53 }
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54
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55 main(argc, argv)
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56 char **argv;
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57 {
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58 unsigned in;
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59
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60 if (argc != 2) {
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61 usage: fprintf(stderr,
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62 "please specify one 4-digit or 6-digit hex RGB value\n");
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63 exit(1);
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64 }
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65 if (!is_arg_all_hex(argv[1]))
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66 goto usage;
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67 in = strtoul(argv[1], 0, 16);
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68 switch (strlen(argv[1])) {
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69 case 4:
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70 convert_565_to_888(in);
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71 exit(0);
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72 case 6:
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73 convert_888_to_565(in);
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74 exit(0);
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75 }
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76 goto usage;
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77 }