dnrops
/
gimp
mirror of https://github.com/GNOME/gimp.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
gimp/plug-ins/common/pnm.c

1102 lines
27 KiB
C
Raw Blame History

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* PNM reading and writing code Copyright (C) 1996 Erik Nygren
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id$ */
/*
* The pnm reading and writing code was written from scratch by Erik Nygren
* (nygren@mit.edu) based on the specifications in the man pages and
* does not contain any code from the netpbm or pbmplus distributions.
*/
#include "config.h"
#include <setjmp.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
/* Declare local data types
*/
typedef struct _PNMScanner
{
gint fd; /* The file descriptor of the file being read */
gchar cur; /* The current character in the input stream */
gint eof; /* Have we reached end of file? */
gchar *inbuf; /* Input buffer - initially 0 */
gint inbufsize; /* Size of input buffer */
gint inbufvalidsize; /* Size of input buffer with valid data */
gint inbufpos; /* Position in input buffer */
} PNMScanner;
typedef struct _PNMInfo
{
gint xres, yres; /* The size of the image */
gint maxval; /* For ascii image files, the max value
* which we need to normalize to */
gint np; /* Number of image planes (0 for pbm) */
gint asciibody; /* 1 if ascii body, 0 if raw body */
jmp_buf jmpbuf; /* Where to jump to on an error loading */
/* Routine to use to load the pnm body */
void (* loader) (PNMScanner *, struct _PNMInfo *, GimpPixelRgn *);
} PNMInfo;
/* Contains the information needed to write out PNM rows */
typedef struct _PNMRowInfo
{
gint fd; /* File descriptor */
gchar *rowbuf; /* Buffer for writing out rows */
gint xres; /* X resolution */
gint np; /* Number of planes */
guchar *red; /* Colormap red */
guchar *grn; /* Colormap green */
guchar *blu; /* Colormap blue */
} PNMRowInfo;
/* Save info */
typedef struct
{
gint raw; /* raw or ascii */
} PNMSaveVals;
typedef struct
{
gint run; /* run */
} PNMSaveInterface;
#define BUFLEN 512 /* The input buffer size for data returned
* from the scanner. Note that lines
* aren't allowed to be over 256 characters
* by the spec anyways so this shouldn't
* be an issue. */
#define SAVE_COMMENT_STRING "# CREATOR: The GIMP's PNM Filter Version 1.0\n"
/* Declare some local functions.
*/
static void query (void);
static void run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (gchar *filename);
static gint save_image (gchar *filename,
gint32 image_ID,
gint32 drawable_ID);
static gint save_dialog (void);
static void save_ok_callback (GtkWidget *widget,
gpointer data);
static void pnm_load_ascii (PNMScanner *scan,
PNMInfo *info,
GimpPixelRgn *pixel_rgn);
static void pnm_load_raw (PNMScanner *scan,
PNMInfo *info,
GimpPixelRgn *pixel_rgn);
static void pnm_load_rawpbm (PNMScanner *scan,
PNMInfo *info,
GimpPixelRgn *pixel_rgn);
static void pnmsaverow_ascii (PNMRowInfo *ri,
guchar *data);
static void pnmsaverow_raw (PNMRowInfo *ri,
guchar *data);
static void pnmsaverow_ascii_indexed (PNMRowInfo *ri,
guchar *data);
static void pnmsaverow_raw_indexed (PNMRowInfo *ri,
guchar *data);
static void pnmscanner_destroy (PNMScanner *s);
static void pnmscanner_createbuffer (PNMScanner *s,
gint bufsize);
static void pnmscanner_getchar (PNMScanner *s);
static void pnmscanner_eatwhitespace (PNMScanner *s);
static void pnmscanner_gettoken (PNMScanner *s,
gchar *buf,
gint bufsize);
static void pnmscanner_getsmalltoken (PNMScanner *s,
gchar *buf);
static PNMScanner * pnmscanner_create (gint fd);
#define pnmscanner_eof(s) ((s)->eof)
#define pnmscanner_fd(s) ((s)->fd)
/* Checks for a fatal error */
#define CHECK_FOR_ERROR(predicate, jmpbuf, errmsg) \
if ((predicate)) \
{ g_message ((errmsg)); longjmp((jmpbuf),1); }
static struct struct_pnm_types
{
gchar name;
gint np;
gint asciibody;
gint maxval;
void (* loader) (PNMScanner *, struct _PNMInfo *, GimpPixelRgn *pixel_rgn);
} pnm_types[] =
{
{ '1', 0, 1, 1, pnm_load_ascii }, /* ASCII PBM */
{ '2', 1, 1, 255, pnm_load_ascii }, /* ASCII PGM */
{ '3', 3, 1, 255, pnm_load_ascii }, /* ASCII PPM */
{ '4', 0, 0, 1, pnm_load_rawpbm }, /* RAW PBM */
{ '5', 1, 0, 255, pnm_load_raw }, /* RAW PGM */
{ '6', 3, 0, 255, pnm_load_raw }, /* RAW PPM */
{ 0 , 0, 0, 0, NULL}
};
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static PNMSaveVals psvals =
{
TRUE /* raw? or ascii */
};
static PNMSaveInterface psint =
{
FALSE /* run */
};
MAIN ()
static void
query (void)
{
static GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw_filename", "The name of the file to load" }
};
static GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static gint nload_args = sizeof (load_args) / sizeof (load_args[0]);
static gint nload_return_vals = (sizeof (load_return_vals) /
sizeof (load_return_vals[0]));
static GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to save" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw_filename", "The name of the file to save the image in" },
{ GIMP_PDB_INT32, "raw", "Specify non-zero for raw output, zero for ascii output" }
};
static gint nsave_args = sizeof (save_args) / sizeof (save_args[0]);
gimp_install_procedure ("file_pnm_load",
"loads files of the pnm file format",
"FIXME: write help for pnm_load",
"Erik Nygren",
"Erik Nygren",
"1996",
"<Load>/PNM",
NULL,
GIMP_PLUGIN,
nload_args, nload_return_vals,
load_args, load_return_vals);
gimp_install_procedure ("file_pnm_save",
"saves files in the pnm file format",
"PNM saving handles all image types except those with alpha channels.",
"Erik Nygren",
"Erik Nygren",
"1996",
"<Save>/PNM",
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
nsave_args, 0,
save_args, NULL);
gimp_register_magic_load_handler ("file_pnm_load",
"pnm,ppm,pgm,pbm",
"",
"0,string,P1,0,string,P2,0,string,P3,0,"
"string,P4,0,string,P5,0,string,P6");
gimp_register_save_handler ("file_pnm_save",
"pnm,ppm,pgm",
"");
}
static void
run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpRunModeType run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image_ID;
gint32 drawable_ID;
GimpExportReturnType export = GIMP_EXPORT_CANCEL;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (run_mode == GIMP_RUN_NONINTERACTIVE)
{
INIT_I18N();
}
else
{
INIT_I18N_UI();
}
if (strcmp (name, "file_pnm_load") == 0)
{
image_ID = load_image (param[1].data.d_string);
if (image_ID != -1)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
else if (strcmp (name, "file_pnm_save") == 0)
{
image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
/* eventually export the image */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init ("pnm", FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "PNM",
(GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED));
if (export == GIMP_EXPORT_CANCEL)
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
break;
default:
break;
}
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("file_pnm_save", &psvals);
/* First acquire information with a dialog */
if (! save_dialog ())
status = GIMP_PDB_CANCEL;
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 6)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
psvals.raw = (param[5].data.d_int32) ? TRUE : FALSE;
}
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("file_pnm_save", &psvals);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (save_image (param[3].data.d_string, image_ID, drawable_ID))
{
/* Store psvals data */
gimp_set_data ("file_pnm_save", &psvals, sizeof (PNMSaveVals));
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image_ID);
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].data.d_status = status;
}
static gint32
load_image (gchar *filename)
{
GimpPixelRgn pixel_rgn;
gint32 volatile image_ID = -1;
gint32 layer_ID;
GimpDrawable *drawable;
int fd; /* File descriptor */
char *temp;
char buf[BUFLEN]; /* buffer for random things like scanning */
PNMInfo *pnminfo;
PNMScanner * volatile scan;
int ctr;
temp = g_strdup_printf (_("Loading %s:"), filename);
gimp_progress_init (temp);
g_free (temp);
/* open the file */
fd = open (filename, O_RDONLY | _O_BINARY);
if (fd == -1)
{
g_message (_("PNM: Can't open file %s."), filename);
return -1;
}
/* allocate the necessary structures */
pnminfo = (PNMInfo *) g_malloc (sizeof (PNMInfo));
scan = NULL;
/* set error handling */
if (setjmp (pnminfo->jmpbuf))
{
/* If we get here, we had a problem reading the file */
if (scan)
pnmscanner_destroy (scan);
close (fd);
g_free (pnminfo);
if (image_ID != -1)
gimp_image_delete (image_ID);
return -1;
}
if (!(scan = pnmscanner_create(fd)))
longjmp(pnminfo->jmpbuf,1);
/* Get magic number */
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR(pnmscanner_eof(scan), pnminfo->jmpbuf,
_("PNM: Premature end of file."));
CHECK_FOR_ERROR((buf[0] != 'P' || buf[2]), pnminfo->jmpbuf,
_("PNM: Invalid file."));
/* Look up magic number to see what type of PNM this is */
for (ctr=0; pnm_types[ctr].name; ctr++)
if (buf[1] == pnm_types[ctr].name)
{
pnminfo->np = pnm_types[ctr].np;
pnminfo->asciibody = pnm_types[ctr].asciibody;
pnminfo->maxval = pnm_types[ctr].maxval;
pnminfo->loader = pnm_types[ctr].loader;
}
if (!pnminfo->loader)
{
g_message (_("PNM: File not in a supported format."));
longjmp(pnminfo->jmpbuf,1);
}
pnmscanner_gettoken(scan, buf, BUFLEN);
CHECK_FOR_ERROR(pnmscanner_eof(scan), pnminfo->jmpbuf,
_("PNM: Premature end of file."));
pnminfo->xres = isdigit(*buf)?atoi(buf):0;
CHECK_FOR_ERROR(pnminfo->xres<=0, pnminfo->jmpbuf,
_("PNM: Invalid X resolution."));
pnmscanner_gettoken(scan, buf, BUFLEN);
CHECK_FOR_ERROR(pnmscanner_eof(scan), pnminfo->jmpbuf,
_("PNM: Premature end of file."));
pnminfo->yres = isdigit(*buf)?atoi(buf):0;
CHECK_FOR_ERROR(pnminfo->yres<=0, pnminfo->jmpbuf,
_("PNM: Invalid Y resolution."));
if (pnminfo->np != 0) /* pbm's don't have a maxval field */
{
pnmscanner_gettoken(scan, buf, BUFLEN);
CHECK_FOR_ERROR(pnmscanner_eof(scan), pnminfo->jmpbuf,
_("PNM: Premature end of file."));
pnminfo->maxval = isdigit(*buf)?atoi(buf):0;
CHECK_FOR_ERROR(((pnminfo->maxval<=0)
|| (pnminfo->maxval>255 && !pnminfo->asciibody)),
pnminfo->jmpbuf,
_("PNM: Invalid maximum value."));
}
/* Create a new image of the proper size and associate the filename with it.
*/
image_ID = gimp_image_new (pnminfo->xres, pnminfo->yres,
(pnminfo->np >= 3) ? GIMP_RGB : GIMP_GRAY);
gimp_image_set_filename (image_ID, filename);
layer_ID = gimp_layer_new (image_ID, _("Background"),
pnminfo->xres, pnminfo->yres,
(pnminfo->np >= 3) ? GIMP_RGB_IMAGE : GIMP_GRAY_IMAGE,
100, GIMP_NORMAL_MODE);
gimp_image_add_layer (image_ID, layer_ID, 0);
drawable = gimp_drawable_get (layer_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height, TRUE, FALSE);
pnminfo->loader (scan, pnminfo, &pixel_rgn);
/* Destroy the scanner */
pnmscanner_destroy (scan);
/* free the structures */
g_free (pnminfo);
/* close the file */
close (fd);
/* Tell the GIMP to display the image.
*/
gimp_drawable_flush (drawable);
return image_ID;
}
static void
pnm_load_ascii (PNMScanner *scan,
PNMInfo *info,
GimpPixelRgn *pixel_rgn)
{
unsigned char *data, *d;
int x, y, i, b;
int start, end, scanlines;
int np;
char buf[BUFLEN];
np = (info->np)?(info->np):1;
data = g_malloc (gimp_tile_height () * info->xres * np);
/* Buffer reads to increase performance */
pnmscanner_createbuffer(scan, 4096);
for (y = 0; y < info->yres; )
{
start = y;
end = y + gimp_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
for (i = 0; i < scanlines; i++)
for (x = 0; x < info->xres; x++)
{
for (b = 0; b < np; b++)
{
/* Truncated files will just have all 0's at the end of the images */
CHECK_FOR_ERROR(pnmscanner_eof(scan), info->jmpbuf,
_("PNM: Premature end of file."));
if (info->np)
pnmscanner_gettoken(scan, buf, BUFLEN);
else
pnmscanner_getsmalltoken(scan, buf);
switch (info->maxval)
{
case 255:
d[b] = isdigit(*buf)?atoi(buf):0;
break;
case 1:
d[b] = (*buf=='0')?0xff:0x00;
break;
default:
d[b] = (unsigned char)(255.0*(((double)(isdigit(*buf)?atoi(buf):0))
/ (double)(info->maxval)));
}
}
d += np;
}
gimp_progress_update ((double) y / (double) info->yres);
gimp_pixel_rgn_set_rect (pixel_rgn, data, 0, y, info->xres, scanlines);
y += scanlines;
}
g_free (data);
}
static void
pnm_load_raw (PNMScanner *scan,
PNMInfo *info,
GimpPixelRgn *pixel_rgn)
{
unsigned char *data, *d;
int x, y, i;
int start, end, scanlines;
int fd;
data = g_malloc (gimp_tile_height () * info->xres * info->np);
fd = pnmscanner_fd(scan);
for (y = 0; y < info->yres; )
{
start = y;
end = y + gimp_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
for (i = 0; i < scanlines; i++)
{
CHECK_FOR_ERROR((info->xres*info->np
!= read(fd, d, info->xres*info->np)),
info->jmpbuf,
_("PNM: Premature end of file."));
if (info->maxval != 255) /* Normalize if needed */
{
for (x = 0; x < info->xres * info->np; x++)
d[x] = (unsigned char)(255.0*(double)(d[x]) / (double)(info->maxval));
}
d += info->xres * info->np;
}
gimp_progress_update ((double) y / (double) info->yres);
gimp_pixel_rgn_set_rect (pixel_rgn, data, 0, y, info->xres, scanlines);
y += scanlines;
}
g_free (data);
}
static void
pnm_load_rawpbm (PNMScanner *scan,
PNMInfo *info,
GimpPixelRgn *pixel_rgn)
{
unsigned char *buf;
unsigned char curbyte;
unsigned char *data, *d;
int x, y, i;
int start, end, scanlines;
int fd;
int rowlen, bufpos;
fd = pnmscanner_fd(scan);
rowlen = (int)ceil((double)(info->xres)/8.0);
data = g_malloc (gimp_tile_height () * info->xres);
buf = g_malloc(rowlen*sizeof(unsigned char));
for (y = 0; y < info->yres; )
{
start = y;
end = y + gimp_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
for (i = 0; i < scanlines; i++)
{
CHECK_FOR_ERROR((rowlen != read(fd, buf, rowlen)),
info->jmpbuf, _("PNM: Error reading file."));
bufpos = 0;
curbyte = buf[0];
for (x = 0; x < info->xres; x++)
{
if ((x % 8) == 0)
curbyte = buf[bufpos++];
d[x] = (curbyte&0x80) ? 0x00 : 0xff;
curbyte <<= 1;
}
d += info->xres;
}
gimp_progress_update ((double) y / (double) info->yres);
gimp_pixel_rgn_set_rect (pixel_rgn, data, 0, y, info->xres, scanlines);
y += scanlines;
}
g_free(buf);
g_free (data);
}
/* Writes out RGB and greyscale raw rows */
static void
pnmsaverow_raw (PNMRowInfo *ri,
unsigned char *data)
{
write(ri->fd, data, ri->xres*ri->np);
}
/* Writes out indexed raw rows */
static void
pnmsaverow_raw_indexed (PNMRowInfo *ri,
unsigned char *data)
{
int i;
char *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres; i++)
{
*(rbcur++) = ri->red[*data];
*(rbcur++) = ri->grn[*data];
*(rbcur++) = ri->blu[*(data++)];
}
write(ri->fd, ri->rowbuf, ri->xres*3);
}
/* Writes out RGB and greyscale ascii rows */
static void
pnmsaverow_ascii (PNMRowInfo *ri,
unsigned char *data)
{
int i;
char *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres*ri->np; i++)
{
sprintf((char *) rbcur,"%d\n", 0xff & *(data++));
rbcur += strlen(rbcur);
}
write(ri->fd, ri->rowbuf, strlen((char *) ri->rowbuf));
}
/* Writes out RGB and greyscale ascii rows */
static void
pnmsaverow_ascii_indexed (PNMRowInfo *ri,
unsigned char *data)
{
int i;
char *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres; i++)
{
sprintf((char *) rbcur,"%d\n", 0xff & ri->red[*(data)]);
rbcur += strlen(rbcur);
sprintf((char *) rbcur,"%d\n", 0xff & ri->grn[*(data)]);
rbcur += strlen(rbcur);
sprintf((char *) rbcur,"%d\n", 0xff & ri->blu[*(data++)]);
rbcur += strlen(rbcur);
}
write(ri->fd, ri->rowbuf, strlen((char *) ri->rowbuf));
}
static gint
save_image (gchar *filename,
gint32 image_ID,
gint32 drawable_ID)
{
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
PNMRowInfo rowinfo;
void (*saverow) (PNMRowInfo *, unsigned char *) = NULL;
unsigned char red[256];
unsigned char grn[256];
unsigned char blu[256];
unsigned char *data, *d;
char *rowbuf;
char buf[BUFLEN];
char *temp;
int np = 0;
int xres, yres;
int ypos, yend;
int rowbufsize = 0;
int fd;
drawable = gimp_drawable_get (drawable_ID);
drawable_type = gimp_drawable_type (drawable_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height, FALSE, FALSE);
/* Make sure we're not saving an image with an alpha channel */
if (gimp_drawable_has_alpha (drawable_ID))
{
g_message (_("PNM save cannot handle images with alpha channels."));
return FALSE;
}
temp = g_strdup_printf (_("Saving %s:"), filename);
gimp_progress_init (temp);
g_free (temp);
/* open the file */
fd = open (filename, O_WRONLY | O_CREAT | O_TRUNC | _O_BINARY, 0644);
if (fd == -1)
{
g_message ("pnm: can't open \"%s\"", filename);
return FALSE;
}
xres = drawable->width;
yres = drawable->height;
/* write out magic number */
if (psvals.raw == FALSE)
switch (drawable_type)
{
case GIMP_GRAY_IMAGE:
write(fd, "P2\n", 3);
np = 1;
rowbufsize = xres * 4;
saverow = pnmsaverow_ascii;
break;
case GIMP_RGB_IMAGE:
write(fd, "P3\n", 3);
np = 3;
rowbufsize = xres * 12;
saverow = pnmsaverow_ascii;
break;
case GIMP_INDEXED_IMAGE:
write(fd, "P3\n", 3);
np = 1;
rowbufsize = xres * 12;
saverow = pnmsaverow_ascii_indexed;
break;
default:
g_warning ("pnm: unknown drawable_type\n");
return FALSE;
}
else if (psvals.raw == TRUE)
switch (drawable_type)
{
case GIMP_GRAY_IMAGE:
write(fd, "P5\n", 3);
np = 1;
rowbufsize = xres;
saverow = pnmsaverow_raw;
break;
case GIMP_RGB_IMAGE:
write(fd, "P6\n", 3);
np = 3;
rowbufsize = xres * 3;
saverow = pnmsaverow_raw;
break;
case GIMP_INDEXED_IMAGE:
write(fd, "P6\n", 3);
np = 1;
rowbufsize = xres * 3;
saverow = pnmsaverow_raw_indexed;
break;
default:
g_warning ("pnm: unknown drawable_type\n");
return FALSE;
}
if (drawable_type == GIMP_INDEXED_IMAGE)
{
int i;
guchar *cmap;
int colors;
cmap = gimp_image_get_cmap (image_ID, &colors);
for (i = 0; i < colors; i++)
{
red[i] = *cmap++;
grn[i] = *cmap++;
blu[i] = *cmap++;
}
rowinfo.red = red;
rowinfo.grn = grn;
rowinfo.blu = blu;
}
/* allocate a buffer for retrieving information from the pixel region */
data = g_new (guchar, gimp_tile_height () * drawable->width * drawable->bpp);
/* write out comment string */
write (fd, SAVE_COMMENT_STRING, strlen (SAVE_COMMENT_STRING));
/* write out resolution and maxval */
sprintf (buf, "%d %d\n255\n", xres, yres);
write (fd, buf, strlen(buf));
rowbuf = g_malloc (rowbufsize + 1);
rowinfo.fd = fd;
rowinfo.rowbuf = rowbuf;
rowinfo.xres = xres;
rowinfo.np = np;
d = NULL; /* only to please the compiler */
/* Write the body out */
for (ypos = 0; ypos < yres; ypos++)
{
if ((ypos % gimp_tile_height ()) == 0)
{
yend = ypos + gimp_tile_height ();
yend = MIN (yend, yres);
gimp_pixel_rgn_get_rect (&pixel_rgn, data,
0, ypos, xres, (yend - ypos));
d = data;
}
(*saverow)(&rowinfo, d);
d += xres*np;
if ((ypos % 20) == 0)
gimp_progress_update ((double) ypos / (double) yres);
}
/* close the file */
close (fd);
g_free (rowbuf);
g_free (data);
gimp_drawable_detach (drawable);
return TRUE;
}
static gint
save_dialog (void)
{
GtkWidget *dlg;
GtkWidget *frame;
dlg = gimp_dialog_new (_("Save as PNM"), "pnm",
gimp_standard_help_func, "filters/pnm.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("OK"), save_ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
_("Cancel"), gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
GTK_SIGNAL_FUNC (gtk_main_quit),
NULL);
/* file save type */
frame = gimp_radio_group_new2 (TRUE, _("Data Formatting"),
gimp_radio_button_update,
&psvals.raw, (gpointer) psvals.raw,
_("Raw"), (gpointer) TRUE, NULL,
_("Ascii"), (gpointer) FALSE, NULL,
NULL);
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, FALSE, TRUE, 0);
gtk_widget_show (frame);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return psint.run;
}
static void
save_ok_callback (GtkWidget *widget,
gpointer data)
{
psint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
/**************** FILE SCANNER UTILITIES **************/
/* pnmscanner_create ---
* Creates a new scanner based on a file descriptor. The
* look ahead buffer is one character initially.
*/
static PNMScanner *
pnmscanner_create (gint fd)
{
PNMScanner *s;
s = (PNMScanner *)g_malloc(sizeof(PNMScanner));
s->fd = fd;
s->inbuf = 0;
s->eof = !read(s->fd, &(s->cur), 1);
return(s);
}
/* pnmscanner_destroy ---
* Destroys a scanner and its resources. Doesn't close the fd.
*/
static void
pnmscanner_destroy (PNMScanner *s)
{
if (s->inbuf) g_free(s->inbuf);
g_free(s);
}
/* pnmscanner_createbuffer ---
* Creates a buffer so we can do buffered reads.
*/
static void
pnmscanner_createbuffer (PNMScanner *s,
gint bufsize)
{
s->inbuf = g_malloc(sizeof(char)*bufsize);
s->inbufsize = bufsize;
s->inbufpos = 0;
s->inbufvalidsize = read(s->fd, s->inbuf, bufsize);
}
/* pnmscanner_gettoken ---
* Gets the next token, eating any leading whitespace.
*/
static void
pnmscanner_gettoken (PNMScanner *s,
gchar *buf,
gint bufsize)
{
int ctr=0;
pnmscanner_eatwhitespace(s);
while (!(s->eof) && !isspace(s->cur) && (s->cur != '#') && (ctr<bufsize))
{
buf[ctr++] = s->cur;
pnmscanner_getchar(s);
}
buf[ctr] = '\0';
}
/* pnmscanner_getsmalltoken ---
* Gets the next char, eating any leading whitespace.
*/
static void
pnmscanner_getsmalltoken (PNMScanner *s,
gchar *buf)
{
pnmscanner_eatwhitespace(s);
if (!(s->eof) && !isspace(s->cur) && (s->cur != '#'))
{
*buf = s->cur;
pnmscanner_getchar(s);
}
}
/* pnmscanner_getchar ---
* Reads a character from the input stream
*/
static void
pnmscanner_getchar (PNMScanner *s)
{
if (s->inbuf)
{
s->cur = s->inbuf[s->inbufpos++];
if (s->inbufpos >= s->inbufvalidsize)
{
if (s->inbufsize > s->inbufvalidsize)
s->eof = 1;
else
s->inbufvalidsize = read(s->fd, s->inbuf, s->inbufsize);
s->inbufpos = 0;
}
}
else
s->eof = !read(s->fd, &(s->cur), 1);
}
/* pnmscanner_eatwhitespace ---
* Eats up whitespace from the input and returns when done or eof.
* Also deals with comments.
*/
static void
pnmscanner_eatwhitespace (PNMScanner *s)
{
int state = 0;
while (!(s->eof) && (state != -1))
{
switch (state)
{
case 0: /* in whitespace */
if (s->cur == '#')
{
state = 1; /* goto comment */
pnmscanner_getchar(s);
}
else if (!isspace(s->cur))
state = -1;
else
pnmscanner_getchar(s);
break;
case 1: /* in comment */
if (s->cur == '\n')
state = 0; /* goto whitespace */
pnmscanner_getchar(s);
break;
}
}
}
Reference in New Issue View Git Blame Copy Permalink