FreeCalypso > hg > freecalypso-sw

annotate miscutil/fc-rgbconv.c @ 992:a7b0b426f9ca

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target-utils: boot ROM UART autodetection revamped The new implementation should work with both the familiar Calypso C035 boot ROM version found in our regular targets as well as the older Calypso F741979B version found on the vintage D-Sample board.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Wed, 30 Dec 2015 21:28:41 +0000
parents 813287f7169c
children
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961
813287f7169c fc-rgbconv utility written and added
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1 /*
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2 * This utility is an aid for phone UI development. The color LCDs in the
813287f7169c fc-rgbconv utility written and added
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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
813287f7169c fc-rgbconv utility written and added
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6 * intuitive, at least to those who understand RGB.
813287f7169c fc-rgbconv utility written and added
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7 *
813287f7169c fc-rgbconv utility written and added
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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 }