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/* rasttopnm.c - read a Sun rasterfile and produce a portable anymap
**
** Copyright (C) 1989, 1991 by Jef Poskanzer.
**
** 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 "pm_c_util.h"
#include "mallocvar.h"
#include "shhopt.h"
#include "pnm.h"
#include "rast.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;
};
static void
parseCommandLine(int argc, const char ** argv,
struct cmdlineInfo * const cmdlineP) {
/*----------------------------------------------------------------------------
Note that the file spec array we return is stored in the storage that
was passed to us as the argv array.
-----------------------------------------------------------------------------*/
optEntry * option_def;
/* Instructions to OptParseOptions2 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 */
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 == 0)
cmdlineP->inputFileName = "-";
else if (argc-1 != 1)
pm_error("Program takes zero or one argument (filename). You "
"specified %d", argc-1);
else
cmdlineP->inputFileName = argv[1];
}
int
main(int argc, const char ** const argv) {
struct cmdlineInfo cmdline;
FILE * ifP;
struct rasterfile header;
colormap_t pr_colormap;
bool grayscale;
struct pixrect * pr;
xel * xelrow;
int rows, cols, format;
unsigned int row;
unsigned int depth;
xelval maxval;
xel zero, one;
int linesize;
unsigned char * data;
unsigned char * byteP;
int rc;
pm_proginit(&argc, argv);
parseCommandLine(argc, argv, &cmdline);
/* Read in the rasterfile. First the header. */
rc = pr_load_header(ifP, &header);
if (rc != 0 )
pm_error("unable to read in rasterfile header");
cols = header.ras_width;
rows = header.ras_height;
depth = header.ras_depth;
if (cols <= 0)
pm_error( "invalid cols: %d", cols );
if (rows <= 0)
pm_error( "invalid rows: %d", rows );
/* If there is a color map, read it. */
if (header.ras_maplength != 0) {
int rc;
unsigned int i;
rc = pr_load_colormap(ifP, &header, &pr_colormap);
if (rc != 0 )
pm_error("unable to skip colormap data");
for (i = 0, grayscale = true; i < header.ras_maplength / 3; ++i) {
if (pr_colormap.map[0][i] != pr_colormap.map[1][i] ||
pr_colormap.map[1][i] != pr_colormap.map[2][i]) {
grayscale = false;
}
}
} else
grayscale = true;
/* Check the depth and color map. */
switch (depth) {
case 1:
if (header.ras_maptype == RMT_NONE && header.ras_maplength == 0) {
maxval = 1;
format = PBM_TYPE;
PNM_ASSIGN1(zero, maxval);
PNM_ASSIGN1(one, 0);
} else if (header.ras_maptype == RMT_EQUAL_RGB &&
header.ras_maplength == 6) {
if (grayscale) {
maxval = 255;
format = PGM_TYPE;
PNM_ASSIGN1( zero, pr_colormap.map[0][0] );
PNM_ASSIGN1( one, pr_colormap.map[0][1] );
} else {
maxval = 255;
format = PPM_TYPE;
PPM_ASSIGN(
zero, pr_colormap.map[0][0], pr_colormap.map[1][0],
pr_colormap.map[2][0]);
PPM_ASSIGN(
one, pr_colormap.map[0][1], pr_colormap.map[1][1],
pr_colormap.map[2][1]);
}
} else
pm_error(
"this depth-1 rasterfile has a non-standard colormap - "
"type %ld length %ld",
header.ras_maptype, header.ras_maplength);
break;
case 8:
if (grayscale) {
maxval = 255;
format = PGM_TYPE;
} else if (header.ras_maptype == RMT_EQUAL_RGB) {
maxval = 255;
format = PPM_TYPE;
} else
pm_error(
"this depth-8 rasterfile has a non-standard colormap - "
"type %ld length %ld",
header.ras_maptype, header.ras_maplength);
break;
case 24:
case 32:
if (header.ras_maptype == RMT_NONE && header.ras_maplength == 0);
else if (header.ras_maptype == RMT_RAW || header.ras_maplength == 768);
else
pm_error(
"this depth-%d rasterfile has a non-standard colormap - "
"type %ld length %ld",
depth, header.ras_maptype, header.ras_maplength);
maxval = 255;
format = PPM_TYPE;
break;
default:
pm_error("invalid depth: %d. Can handle only depth 1, 8, 24, or 32.",
depth);
}
/* Now load the data. The pixrect returned is a memory pixrect. */
pr = pr_load_image(ifP, &header, NULL);
if (pr == NULL )
pm_error("unable to read in the image from the rasterfile" );
linesize = ((struct mpr_data*) pr->pr_data)->md_linebytes;
data = ((struct mpr_data*) pr->pr_data)->md_image;
/* Now write out the anymap. */
pnm_writepnminit(stdout, cols, rows, maxval, format, 0);
xelrow = pnm_allocrow(cols);
switch (PNM_FORMAT_TYPE(format)) {
case PBM_TYPE:
pm_message("writing PBM file");
break;
case PGM_TYPE:
pm_message("writing PGM file");
break;
case PPM_TYPE:
pm_message("writing PPM file");
break;
default:
abort();
}
for (row = 0; row < rows; ++row) {
byteP = data;
switch (depth) {
case 1: {
unsigned int col;
unsigned char mask;
for (col = 0, mask = 0x80; col < cols; ++col) {
if (mask == 0x00) {
++byteP;
mask = 0x80;
}
xelrow[col] = (*byteP & mask) ? one : zero;
mask = mask >> 1;
}
} break;
case 8: {
unsigned int col;
for (col = 0; col < cols; ++col) {
if (header.ras_maplength == 0)
PNM_ASSIGN1(xelrow[col], *byteP);
else if (grayscale)
PNM_ASSIGN1(xelrow[col], pr_colormap.map[0][*byteP]);
else
PPM_ASSIGN(xelrow[col],
pr_colormap.map[0][*byteP],
pr_colormap.map[1][*byteP],
pr_colormap.map[2][*byteP]);
++byteP;
}
} break;
case 24:
case 32: {
unsigned int col;
for (col = 0; col < cols; ++col) {
xelval r, g, b;
if (depth == 32)
++byteP;
if (header.ras_type == RT_FORMAT_RGB) {
r = *byteP++;
g = *byteP++;
b = *byteP++;
} else {
b = *byteP++;
g = *byteP++;
r = *byteP++;
}
if (header.ras_maplength == 0)
PPM_ASSIGN(xelrow[col], r, g, b);
else
PPM_ASSIGN(xelrow[col],
pr_colormap.map[0][r],
pr_colormap.map[1][g],
pr_colormap.map[2][b]);
}
} break;
default:
pm_error("Invalid depth value: %u", depth);
}
data += linesize;
pnm_writepnmrow(stdout, xelrow, cols, maxval, format, 0);
}
pm_close(ifP);
pm_close(stdout);
return 0;
}
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