FreeCalypso > hg > freecalypso-tools
annotate miscutil/fc-rgbconv.c @ 995:74024eb17e04
fc-loadtool help: improve language regarding 16 MiB flash chips
In FC project history, 16 MiB flash originally meant Pirelli DP-L10.
Then we got FCDEV3B with the same flash (our own design), but now we are
discovering more Calypso devices that used such large flash, both late
Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID
devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to
migrate to more generic or neutral language in associated documentation,
without giving elevated status to specific examples that drove our
early project history.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 03 Dec 2023 21:11:12 +0000 |
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0
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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 } |