diff options
Diffstat (limited to 'converter/other/pamtosrf.c')
| -rw-r--r-- | converter/other/pamtosrf.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/converter/other/pamtosrf.c b/converter/other/pamtosrf.c new file mode 100644 index 00000000..3800d77c --- /dev/null +++ b/converter/other/pamtosrf.c @@ -0,0 +1,217 @@ +/* + * Convert a Netpbm image to SRF (Garmin vehicle) + * + * Copyright (C) 2011 by Mike Frysinger <vapier@gentoo.org> + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for any purpose and without fee is hereby granted, provided + * that the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation. This software is provided "as is" without express or + * implied warranty. + */ + +#include <stdio.h> + +#include "pm_c_util.h" +#include "shhopt.h" +#include "mallocvar.h" +#include "nstring.h" +#include "pam.h" +#include "srf.h" + +struct cmdlineInfo { + /* All the information the user supplied in the command line, + in a form easy for the program to use. + */ + const char * inputFileName; /* '-' if stdin */ + unsigned int verbose; +}; + +static bool verbose; + + + +static void +parseCommandLine(int argc, const char ** argv, + struct cmdlineInfo * const cmdlineP) { +/*---------------------------------------------------------------------------- + parse program command line described in Unix standard form by argc + and argv. Return the information in the options as *cmdlineP. + + If command line is internally inconsistent (invalid options, etc.), + issue error message to stderr and abort program. + + Note that the strings we return are stored in the storage that + was passed to us as the argv array. We also trash *argv. +-----------------------------------------------------------------------------*/ + optEntry *option_def; + /* Instructions to pm_optParseOptions3 on how to parse our options. + */ + optStruct3 opt; + + unsigned int option_def_index; + + MALLOCARRAY_NOFAIL(option_def, 100); + + option_def_index = 0; /* incremented by OPTENT3 */ + OPTENT3(0, "verbose", OPT_FLAG, NULL, + &cmdlineP->verbose, 0); + + opt.opt_table = option_def; + opt.short_allowed = FALSE; /* We have no short (old-fashioned) options */ + opt.allowNegNum = FALSE; /* We have no parms that are negative numbers */ + + pm_optParseOptions3(&argc, (char **)argv, opt, sizeof(opt), 0); + /* Uses and sets argc, argv, and some of *cmdlineP and others. */ + + if (argc-1 < 1) + cmdlineP->inputFileName = "-"; + else if (argc-1 == 1) + cmdlineP->inputFileName = argv[1]; + else + pm_error("Program takes at most one argument: input file name"); +} + + + +static uint8_t +srfScale(sample const unscaled, + const struct pam * const pamP) { + + return pnm_scalesample(unscaled, pamP->maxval, 255); +} + + + +static uint16_t +srfColorFromTuple(tuple const t, + const struct pam * const pamP) { + + unsigned int redPlane, grnPlane, bluPlane; + + if (pamP->depth >= 3) { + redPlane = PAM_RED_PLANE; + grnPlane = PAM_GRN_PLANE; + bluPlane = PAM_BLU_PLANE; + } else { + redPlane = 0; + grnPlane = 0; + bluPlane = 0; + } + return + (((srfScale(t[redPlane], pamP) >> 3) & 0x1f) << 11) | + (((srfScale(t[grnPlane], pamP) >> 3) & 0x1f) << 6) | + (((srfScale(t[bluPlane], pamP) >> 3) & 0x1f) << 0); +} + + + +static uint8_t +srfAlphaFromTuple(tuple const t, + const struct pam * const pamP) { + + uint8_t retval; + int haveOpacity; + unsigned int opacityPlane; + + pnm_getopacity(pamP, &haveOpacity, &opacityPlane); + + if (haveOpacity) { + uint8_t const scaled = srfScale(t[opacityPlane], pamP); + + retval = scaled == 0xff ? SRF_ALPHA_OPAQUE : 128 - (scaled >> 1); + } else + retval = SRF_ALPHA_OPAQUE; + + return retval; +} + + + +static void +convertRaster(struct pam * const pamP, + struct srf_img * const imgP) { + + tuple * tuplerow; + unsigned int row; + + tuplerow = pnm_allocpamrow(pamP); + + for (row = 0; row < pamP->height; ++row) { + uint32_t const off = row * pamP->width; + uint16_t * const data = &imgP->data.data[off]; + unsigned char * const alpha = &imgP->alpha.data[off]; + + unsigned int col; + + pnm_readpamrow(pamP, tuplerow); + + for (col = 0; col < pamP->width; ++col) { + alpha[col] = srfAlphaFromTuple(tuplerow[col], pamP); + data[col] = srfColorFromTuple(tuplerow[col], pamP); + } + } + pnm_freepamrow(tuplerow); +} + + + +static void +convertImage(FILE * const ifP, + struct srf * const srfP) { + + struct pam inpam; + + pnm_readpaminit(ifP, &inpam, PAM_STRUCT_SIZE(tuple_type)); + + if (verbose) + pm_message("reading %ux%u image", inpam.width, inpam.height); + + srf_create_img(srfP, inpam.width, inpam.height); + + convertRaster(&inpam, &srfP->imgs[srfP->header.img_cnt-1]); +} + + + +int +main(int argc, const char * argv[]) { + + struct cmdlineInfo cmdline; + FILE * ifP; + struct srf srf; + int eof; /* No more images in input */ + unsigned int imageSeq; + /* Sequence of current image in input file. First = 0 */ + + pm_proginit(&argc, argv); + + parseCommandLine(argc, argv, &cmdline); + + verbose = cmdline.verbose; + + ifP = pm_openr(cmdline.inputFileName); + + srf_init(&srf); + + eof = FALSE; + for (imageSeq = 0; !eof; ++imageSeq) { + if (verbose) + pm_message("Converting Image %u", imageSeq); + + convertImage(ifP, &srf); + + pnm_nextimage(ifP, &eof); + } + + srf_write(stdout, &srf); + + srf_term(&srf); + pm_closer(ifP); + + return 0; +} + + + |