FreeCalypso > hg > freecalypso-tools
view miscutil/fc-rgbconv.c @ 619:f82551c77e58
libserial-newlnx: ASYNC_LOW_LATENCY patch reverted
Reports from Das Signal indicate that loadtools performance on Debian
is about the same as on Slackware, and that including or omitting the
ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the
patch in question does not appear to be necessary, it is being reverted
until and unless someone other than Serg reports an actual real-world
system on which loadtools operation times are slowed compared to the
Mother's Slackware reference and on which Slackware-like performance
can be restored by setting the ASYNC_LOW_LATENCY flag.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 27 Feb 2020 01:09:48 +0000 |
parents | e7502631a0f9 |
children |
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/* * This utility is an aid for phone UI development. The color LCDs in the * phones targeted by FreeCalypso implement 16-bit color in RGB 5:6:5 format, * but these 16-bit color words are not particularly intuitive in raw hex form. * In contrast, a 24-bit RGB 8:8:8 color given in RRGGBB hex form is quite * intuitive, at least to those who understand RGB. * * This utility performs the conversion. It takes a single command line * argument that must be either 4 or 6 hex digits. If the argument is 4 hex * digits, it is interpreted as RGB 5:6:5 and converted into RGB 8:8:8. * If the argument is 6 hex digits, it is interpreted as RGB 8:8:8 and * converted into RGB 5:6:5. The output of the conversion is emitted on * stdout as 4 or 6 hex digits. */ #include <stdio.h> #include <stdlib.h> #include <ctype.h> #include <string.h> is_arg_all_hex(str) char *str; { char *cp; int c; for (cp = str; c = *cp++; ) if (!isxdigit(c)) return(0); return(1); } convert_565_to_888(in) unsigned in; { unsigned r, g, b; r = in >> 11; g = (in >> 5) & 0x3F; b = in & 0x1F; printf("%02X%02X%02X\n", r << 3, g << 2, b << 3); } convert_888_to_565(in) unsigned in; { unsigned r, g, b; r = (in >> 16) >> 3; g = ((in >> 8) & 0xFF) >> 2; b = (in & 0xFF) >> 3; printf("%04X\n", (r << 11) | (g << 5) | b); } main(argc, argv) char **argv; { unsigned in; if (argc != 2) { usage: fprintf(stderr, "please specify one 4-digit or 6-digit hex RGB value\n"); exit(1); } if (!is_arg_all_hex(argv[1])) goto usage; in = strtoul(argv[1], 0, 16); switch (strlen(argv[1])) { case 4: convert_565_to_888(in); exit(0); case 6: convert_888_to_565(in); exit(0); } goto usage; }