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gimp/plug-ins/common/file-pnm.c

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Import Upstream version 2.10.32
2022-11-23 10:54:48 +08:00
/* GIMP - The GNU 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 3 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, see <https://www.gnu.org/licenses/>.
*/
/*
* 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.
*
* 2006: pbm saving written by Martin K Collins (martin@mkcollins.org)
* 2015: pfm reading written by Tobias Ellinghaus (me@houz.org)
*/
#include "config.h"
#include <setjmp.h>
#include <stdlib.h>
#include <math.h>
#include <errno.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define LOAD_PROC "file-pnm-load"
#define PNM_SAVE_PROC "file-pnm-save"
#define PBM_SAVE_PROC "file-pbm-save"
#define PGM_SAVE_PROC "file-pgm-save"
#define PPM_SAVE_PROC "file-ppm-save"
#define PFM_SAVE_PROC "file-pfm-save"
#define PLUG_IN_BINARY "file-pnm"
#define PLUG_IN_ROLE "gimp-file-pnm"
/* Declare local data types
*/
typedef struct _PNMScanner PNMScanner;
typedef struct _PNMInfo PNMInfo;
typedef struct _PNMRowInfo PNMRowInfo;
typedef void (* PNMLoaderFunc) (PNMScanner *scanner,
PNMInfo *info,
GeglBuffer *buffer);
typedef gboolean (* PNMSaverowFunc) (PNMRowInfo *info,
guchar *data,
GError **error);
struct _PNMScanner
{
GInputStream *input; /* The input stream 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 */
};
struct _PNMInfo
{
gint xres, yres; /* The size of the image */
gboolean float_format; /* Whether it is a floating point format */
gint maxval; /* For integer format image files, the max value
* which we need to normalize to */
gfloat scale_factor; /* PFM files have a scale factor */
gint np; /* Number of image planes (0 for pbm) */
gboolean asciibody; /* 1 if ascii body, 0 if raw body */
jmp_buf jmpbuf; /* Where to jump to on an error loading */
PNMLoaderFunc loader; /* Routine to use to load the pnm body */
};
/* Contains the information needed to write out PNM rows */
struct _PNMRowInfo
{
GOutputStream *output; /* Output stream */
gchar *rowbuf; /* Buffer for writing out rows */
gint xres; /* X resolution */
gint np; /* Number of planes */
gint bpc; /* Bytes per color */
guchar *red; /* Colormap red */
guchar *grn; /* Colormap green */
guchar *blu; /* Colormap blue */
gboolean zero_is_black; /* index zero is black (PBM only) */
};
/* Export info */
typedef struct
{
gint raw; /* raw or ascii */
} PNMSaveVals;
#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. */
/* Declare some local functions.
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (GFile *file,
GError **error);
static gint save_image (GFile *file,
gint32 image_ID,
gint32 drawable_ID,
gboolean pbm,
gboolean float_format,
GError **error);
static gboolean save_dialog (void);
static void pnm_load_ascii (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static void pnm_load_raw (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static void pnm_load_rawpbm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static void pnm_load_rawpfm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer);
static gboolean pnmsaverow_ascii (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_raw (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_raw_pbm (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_ascii_pbm (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_ascii_indexed (PNMRowInfo *ri,
guchar *data,
GError **error);
static gboolean pnmsaverow_raw_indexed (PNMRowInfo *ri,
guchar *data,
GError **error);
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 (GInputStream *input);
#define pnmscanner_eof(s) ((s)->eof)
#define pnmscanner_input(s) ((s)->input)
/* Checks for a fatal error */
#define CHECK_FOR_ERROR(predicate, jmpbuf, ...) \
if ((predicate)) \
{ g_message (__VA_ARGS__); longjmp ((jmpbuf), 1); }
static const struct
{
gchar name;
gint np;
gint asciibody;
gint maxval;
PNMLoaderFunc loader;
} 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 */
{ 'F', 3, 0, 0, pnm_load_rawpfm }, /* RAW PFM (color) */
{ 'f', 1, 0, 0, pnm_load_rawpfm }, /* RAW PFM (grayscale) */
{ 0 , 0, 0, 0, NULL}
};
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static PNMSaveVals psvals =
{
TRUE /* raw? or ascii */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to load" }
};
static const GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static const GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to export" },
{ GIMP_PDB_STRING, "filename", "The name of the file to export the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to export the image in" },
{ GIMP_PDB_INT32, "raw", "TRUE for raw output, FALSE for ascii output" }
};
static const GimpParamDef pfm_save_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to export" },
{ GIMP_PDB_STRING, "filename", "The name of the file to export the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to export the image in" }
};
gimp_install_procedure (LOAD_PROC,
"Loads files in the PNM file format",
"This plug-in loads files in the various Netpbm portable file formats.",
"Erik Nygren",
"Erik Nygren",
"1996",
N_("PNM Image"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_file_handler_mime (LOAD_PROC, "image/x-portable-anymap");
gimp_register_file_handler_uri (LOAD_PROC);
gimp_register_magic_load_handler (LOAD_PROC,
"pnm,ppm,pgm,pbm,pfm",
"",
"0,string,P1,0,string,P2,0,string,P3,"
"0,string,P4,0,string,P5,0,string,P6,"
"0,string,PF,0,string,Pf");
gimp_install_procedure (PNM_SAVE_PROC,
"Exports files in the PNM file format",
"PNM exporting handles all image types without transparency.",
"Erik Nygren",
"Erik Nygren",
"1996",
N_("PNM image"),
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_install_procedure (PBM_SAVE_PROC,
"Exports files in the PBM file format",
"PBM exporting produces mono images without transparency.",
"Martin K Collins",
"Erik Nygren",
"2006",
N_("PBM image"),
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_install_procedure (PGM_SAVE_PROC,
"Exports files in the PGM file format",
"PGM exporting produces grayscale images without transparency.",
"Erik Nygren",
"Erik Nygren",
"1996",
N_("PGM image"),
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_install_procedure (PPM_SAVE_PROC,
"Exports files in the PPM file format",
"PPM exporting handles RGB images without transparency.",
"Erik Nygren",
"Erik Nygren",
"1996",
N_("PPM image"),
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_install_procedure (PFM_SAVE_PROC,
"Exports files in the PFM file format",
"PFM exporting handles all images without transparency.",
"Mukund Sivaraman",
"Mukund Sivaraman",
"2015",
N_("PFM image"),
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (pfm_save_args), 0,
pfm_save_args, NULL);
gimp_register_file_handler_mime (PNM_SAVE_PROC, "image/x-portable-anymap");
gimp_register_file_handler_mime (PBM_SAVE_PROC, "image/x-portable-bitmap");
gimp_register_file_handler_mime (PGM_SAVE_PROC, "image/x-portable-graymap");
gimp_register_file_handler_mime (PPM_SAVE_PROC, "image/x-portable-pixmap");
gimp_register_file_handler_mime (PPM_SAVE_PROC, "image/x-portable-floatmap");
gimp_register_file_handler_uri (PNM_SAVE_PROC);
gimp_register_file_handler_uri (PBM_SAVE_PROC);
gimp_register_file_handler_uri (PGM_SAVE_PROC);
gimp_register_file_handler_uri (PPM_SAVE_PROC);
gimp_register_file_handler_uri (PFM_SAVE_PROC);
gimp_register_save_handler (PNM_SAVE_PROC, "pnm", "");
gimp_register_save_handler (PBM_SAVE_PROC, "pbm", "");
gimp_register_save_handler (PGM_SAVE_PROC, "pgm", "");
gimp_register_save_handler (PPM_SAVE_PROC, "ppm", "");
gimp_register_save_handler (PFM_SAVE_PROC, "pfm", "");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image_ID;
gint32 drawable_ID;
GimpExportReturn export = GIMP_EXPORT_CANCEL;
GError *error = NULL;
gboolean pbm = FALSE; /* flag for PBM output */
gboolean float_format = FALSE; /* flag for PFM output */
INIT_I18N ();
gegl_init (NULL, NULL);
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 (strcmp (name, LOAD_PROC) == 0)
{
image_ID = load_image (g_file_new_for_uri (param[1].data.d_string),
&error);
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, PNM_SAVE_PROC) == 0 ||
strcmp (name, PBM_SAVE_PROC) == 0 ||
strcmp (name, PGM_SAVE_PROC) == 0 ||
strcmp (name, PPM_SAVE_PROC) == 0 ||
strcmp (name, PFM_SAVE_PROC) == 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 (PLUG_IN_BINARY, FALSE);
if (strcmp (name, PNM_SAVE_PROC) == 0)
{
export = gimp_export_image (&image_ID, &drawable_ID, "PNM",
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED);
}
else if (strcmp (name, PBM_SAVE_PROC) == 0)
{
export = gimp_export_image (&image_ID, &drawable_ID, "PBM",
GIMP_EXPORT_CAN_HANDLE_BITMAP);
pbm = TRUE; /* gimp has no mono image type so hack it */
}
else if (strcmp (name, PGM_SAVE_PROC) == 0)
{
export = gimp_export_image (&image_ID, &drawable_ID, "PGM",
GIMP_EXPORT_CAN_HANDLE_GRAY);
}
else if (strcmp (name, PPM_SAVE_PROC) == 0)
{
export = gimp_export_image (&image_ID, &drawable_ID, "PPM",
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_INDEXED);
}
else
{
export = gimp_export_image (&image_ID, &drawable_ID, "PFM",
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY);
float_format = TRUE;
}
if (export == GIMP_EXPORT_CANCEL)
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
break;
default:
break;
}
if (strcmp (name, PFM_SAVE_PROC) != 0)
{
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (name, &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;
pbm = (strcmp (name, PBM_SAVE_PROC) == 0);
}
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (name, &psvals);
break;
default:
break;
}
}
else
{
switch (run_mode)
{
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 5)
{
status = GIMP_PDB_CALLING_ERROR;
}
break;
default:
break;
}
}
if (status == GIMP_PDB_SUCCESS)
{
if (save_image (g_file_new_for_uri (param[3].data.d_string),
image_ID, drawable_ID, pbm, float_format,
&error))
{
if (strcmp (name, PFM_SAVE_PROC) != 0)
{
/* Store psvals data */
gimp_set_data (name, &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;
}
if (status != GIMP_PDB_SUCCESS && error)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_STRING;
values[1].data.d_string = error->message;
}
values[0].data.d_status = status;
gegl_exit ();
}
static gint32
load_image (GFile *file,
GError **error)
{
GInputStream *input;
GeglBuffer *buffer;
gint32 volatile image_ID = -1;
gint32 layer_ID;
char buf[BUFLEN + 4]; /* buffer for random things like scanning */
PNMInfo *pnminfo;
PNMScanner *volatile scan;
int ctr;
GimpPrecision precision;
gimp_progress_init_printf (_("Opening '%s'"),
g_file_get_parse_name (file));
input = G_INPUT_STREAM (g_file_read (file, NULL, error));
if (! input)
return -1;
/* allocate the necessary structures */
pnminfo = g_new (PNMInfo, 1);
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);
g_object_unref (input);
g_free (pnminfo);
if (image_ID != -1)
gimp_image_delete (image_ID);
return -1;
}
if (! (scan = pnmscanner_create (input)))
longjmp (pnminfo->jmpbuf, 1);
/* Get magic number */
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
CHECK_FOR_ERROR ((buf[0] != 'P' || buf[2]), pnminfo->jmpbuf,
_("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->float_format = g_ascii_tolower (pnm_types[ctr].name) == 'f';
pnminfo->maxval = pnm_types[ctr].maxval;
pnminfo->loader = pnm_types[ctr].loader;
}
if (!pnminfo->loader)
{
g_message (_("File not in a supported format."));
longjmp (pnminfo->jmpbuf, 1);
}
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
pnminfo->xres = g_ascii_isdigit(*buf) ? atoi (buf) : 0;
CHECK_FOR_ERROR (pnminfo->xres <= 0, pnminfo->jmpbuf,
_("Invalid X resolution."));
CHECK_FOR_ERROR (pnminfo->xres > GIMP_MAX_IMAGE_SIZE, pnminfo->jmpbuf,
_("Image width is larger than GIMP can handle."));
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
pnminfo->yres = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
CHECK_FOR_ERROR (pnminfo->yres <= 0, pnminfo->jmpbuf,
_("Invalid Y resolution."));
CHECK_FOR_ERROR (pnminfo->yres > GIMP_MAX_IMAGE_SIZE, pnminfo->jmpbuf,
_("Image height is larger than GIMP can handle."));
if (pnminfo->float_format)
{
gchar *endptr = NULL;
pnmscanner_gettoken (scan, buf, BUFLEN);
CHECK_FOR_ERROR (pnmscanner_eof (scan), pnminfo->jmpbuf,
_("Premature end of file."));
pnminfo->scale_factor = g_ascii_strtod (buf, &endptr);
CHECK_FOR_ERROR (endptr == NULL || *endptr != 0 || errno == ERANGE,
pnminfo->jmpbuf, _("Bogus scale factor."));
CHECK_FOR_ERROR (!isnormal (pnminfo->scale_factor),
pnminfo->jmpbuf, _("Unsupported scale factor."));
precision = GIMP_PRECISION_FLOAT_LINEAR;
}
else 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,
_("Premature end of file."));
pnminfo->maxval = g_ascii_isdigit (*buf) ? atoi (buf) : 0;
CHECK_FOR_ERROR (((pnminfo->maxval<=0) || (pnminfo->maxval>65535)),
pnminfo->jmpbuf, _("Unsupported maximum value."));
if (pnminfo->maxval < 256)
{
precision = GIMP_PRECISION_U8_GAMMA;
}
else
{
precision = GIMP_PRECISION_U16_GAMMA;
}
}
else
{
precision = GIMP_PRECISION_U8_GAMMA;
}
/* Create a new image of the proper size and associate the filename
with it. */
image_ID = gimp_image_new_with_precision
(pnminfo->xres, pnminfo->yres,
(pnminfo->np >= 3) ? GIMP_RGB : GIMP_GRAY,
precision);
gimp_image_set_filename (image_ID, g_file_get_uri (file));
layer_ID = gimp_layer_new (image_ID, _("Background"),
pnminfo->xres, pnminfo->yres,
(pnminfo->np >= 3 ?
GIMP_RGB_IMAGE : GIMP_GRAY_IMAGE),
100,
gimp_image_get_default_new_layer_mode (image_ID));
gimp_image_insert_layer (image_ID, layer_ID, -1, 0);
buffer = gimp_drawable_get_buffer (layer_ID);
pnminfo->loader (scan, pnminfo, buffer);
/* Destroy the scanner */
pnmscanner_destroy (scan);
g_object_unref (buffer);
g_free (pnminfo);
g_object_unref (input);
return image_ID;
}
static void
pnm_load_ascii (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
gint bpc;
guchar *data, *d;
gushort *s;
gint x, y, i, b;
gint start, end, scanlines;
gint np;
gchar buf[BUFLEN];
gboolean aborted = FALSE;
np = (info->np) ? (info->np) : 1;
if (info->maxval > 255)
bpc = 2;
else
bpc = 1;
/* No overflow as long as gimp_tile_height() < 1365 = 2^(31 - 18) / 6 */
data = g_new (guchar, gimp_tile_height () * info->xres * np * bpc);
/* Buffer reads to increase performance */
pnmscanner_createbuffer (scan, 4096);
for (y = 0; y < info->yres; y += scanlines)
{
start = y;
end = y + gimp_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
s = (gushort *)d;
for (i = 0; i < scanlines; i++)
for (x = 0; x < info->xres; x++)
{
for (b = 0; b < np; b++)
{
if (aborted)
{
d[b] = 0;
continue;
}
/* Truncated files will just have all 0's
at the end of the images */
if (pnmscanner_eof (scan))
{
g_message (_("Premature end of file."));
aborted = TRUE;
d[b] = 0;
continue;
}
if (info->np)
pnmscanner_gettoken (scan, buf, BUFLEN);
else
pnmscanner_getsmalltoken (scan, buf);
if (info->maxval == 1)
{
if (info->np)
d[b] = (*buf == '0') ? 0x00 : 0xff;
else
d[b] = (*buf == '0') ? 0xff : 0x00; /* invert for PBM */
}
else if (bpc > 1)
{
s[b] = (65535.0 * (((gdouble) (g_ascii_isdigit (*buf) ?
atoi (buf) : 0))
/ (gdouble) (info->maxval)));
}
else
{
d[b] = (255.0 * (((gdouble) (g_ascii_isdigit (*buf) ?
atoi (buf) : 0))
/ (gdouble) (info->maxval)));
}
}
if (bpc > 1)
{
s += np;
}
else
{
d += np;
}
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y, info->xres, scanlines), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
gimp_progress_update ((double) y / (double) info->yres);
}
g_free (data);
gimp_progress_update (1.0);
}
static void
pnm_load_raw (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
GInputStream *input;
gint bpc;
guchar *data, *d;
gushort *s;
gint x, y, i;
gint start, end, scanlines;
if (info->maxval > 255)
bpc = 2;
else
bpc = 1;
/* No overflow as long as gimp_tile_height() < 1365 = 2^(31 - 18) / 6 */
data = g_new (guchar, gimp_tile_height () * info->xres * info->np * bpc);
input = pnmscanner_input (scan);
for (y = 0; y < info->yres; y += scanlines)
{
start = y;
end = y + gimp_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
s = (gushort *)data;
for (i = 0; i < scanlines; i++)
{
gsize bytes_read;
GError *error = NULL;
if (g_input_stream_read_all (input, d, info->xres * info->np * bpc,
&bytes_read, NULL, &error))
{
CHECK_FOR_ERROR (info->xres * info->np * bpc != bytes_read,
info->jmpbuf,
_("Premature end of file."));
}
else
{
CHECK_FOR_ERROR (FALSE, info->jmpbuf, "%s", error->message);
}
if (bpc > 1)
{
for (x = 0; x < info->xres * info->np; x++)
{
int v;
v = *d++ << 8;
v += *d++;
s[x] = MIN (v, info->maxval); /* guard against overflow */
s[x] = 65535.0 * (gdouble) v / (gdouble) info->maxval;
}
s += info->xres * info->np;
}
else
{
if (info->maxval != 255) /* Normalize if needed */
{
for (x = 0; x < info->xres * info->np; x++)
{
d[x] = MIN (d[x], info->maxval); /* guard against overflow */
d[x] = 255.0 * (gdouble) d[x] / (gdouble) info->maxval;
}
}
d += info->xres * info->np;
}
}
gegl_buffer_set (buffer,
GEGL_RECTANGLE (0, y, info->xres, scanlines), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
gimp_progress_update ((double) y / (double) info->yres);
}
g_free (data);
gimp_progress_update (1.0);
}
static void
pnm_load_rawpbm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
GInputStream *input;
guchar *buf;
guchar curbyte;
guchar *data, *d;
gint x, y, i;
gint start, end, scanlines;
gint rowlen, bufpos;
input = pnmscanner_input (scan);
rowlen = (int)ceil ((double)(info->xres)/8.0);
data = g_new (guchar, gimp_tile_height () * info->xres);
buf = g_new (guchar, rowlen);
for (y = 0; y < info->yres; y += scanlines)
{
start = y;
end = y + gimp_tile_height ();
end = MIN (end, info->yres);
scanlines = end - start;
d = data;
for (i = 0; i < scanlines; i++)
{
gsize bytes_read;
GError *error = NULL;
if (g_input_stream_read_all (input, buf, rowlen,
&bytes_read, NULL, &error))
{
CHECK_FOR_ERROR (rowlen != bytes_read,
info->jmpbuf,
_("Premature end of file."));
}
else
{
CHECK_FOR_ERROR (FALSE, info->jmpbuf, "%s", error->message);
}
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;
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y, info->xres, scanlines), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
gimp_progress_update ((double) y / (double) info->yres);
}
g_free (buf);
g_free (data);
gimp_progress_update (1.0);
}
static void
pnm_load_rawpfm (PNMScanner *scan,
PNMInfo *info,
GeglBuffer *buffer)
{
GInputStream *input;
gfloat *data;
gint x, y;
gboolean swap_byte_order;
swap_byte_order =
(info->scale_factor >= 0.0) ^ (G_BYTE_ORDER == G_BIG_ENDIAN);
data = g_new (gfloat, info->xres * info->np);
input = pnmscanner_input (scan);
for (y = info->yres - 1; y >= 0; y--)
{
gsize bytes_read;
GError *error = NULL;
if (g_input_stream_read_all (input, data,
info->xres * info->np * sizeof (float),
&bytes_read, NULL, &error))
{
CHECK_FOR_ERROR
(info->xres * info->np * sizeof (float) != bytes_read,
info->jmpbuf, _("Premature end of file."));
}
else
{
CHECK_FOR_ERROR (FALSE, info->jmpbuf, "%s", error->message);
}
for (x = 0; x < info->xres * info->np; x++)
{
if (swap_byte_order)
{
union { gfloat f; guint32 i; } v;
v.f = data[x];
v.i = GUINT32_SWAP_LE_BE (v.i);
data[x] = v.f;
}
/* let's see if this is what people want, the PFM specs are a
* little vague about what the scale factor should be used
* for */
data[x] *= fabsf (info->scale_factor);
/* Keep values smaller than zero. That is in line with what the
* TIFF loader does. If the user doesn't want the negative numbers
* he has to get rid of them afterwards */
/* data[x] = fmaxf (0.0f, fminf (FLT_MAX, data[x])); */
}
gegl_buffer_set (buffer,
GEGL_RECTANGLE (0, y, info->xres, 1), 0,
NULL, data, GEGL_AUTO_ROWSTRIDE);
if (y % 32 == 0)
gimp_progress_update ((double) (info->yres - y) / (double) info->yres);
}
g_free (data);
gimp_progress_update (1.0);
}
static gboolean
output_write (GOutputStream *output,
gconstpointer buffer,
gsize count,
GError **error)
{
return g_output_stream_write_all (output, buffer, count, NULL, NULL, error);
}
/* Writes out mono raw rows */
static gboolean
pnmsaverow_raw_pbm (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint b, p = 0;
gchar *rbcur = ri->rowbuf;
gint32 len = (gint) ceil ((gdouble) (ri->xres) / 8.0);
for (b = 0; b < len; b++) /* each output byte */
{
gint i;
rbcur[b] = 0;
for (i = 0; i < 8; i++) /* each bit in this byte */
{
if (p >= ri->xres)
break;
if (data[p] != ri->zero_is_black)
rbcur[b] |= (char) (1 << (7 - i));
p++;
}
}
return output_write (ri->output, ri->rowbuf, len, error);
}
/* Writes out mono ascii rows */
static gboolean
pnmsaverow_ascii_pbm (PNMRowInfo *ri,
guchar *data,
GError **error)
{
static gint line_len = 0; /* ascii pbm lines must be <= 70 chars long */
gint32 len = 0;
gint i;
gchar *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres; i++)
{
if (line_len > 69)
{
rbcur[i] = '\n';
line_len = 0;
len++;
rbcur++;
}
if (data[i] == ri->zero_is_black)
rbcur[i] = '0';
else
rbcur[i] = '1';
line_len++;
len++;
}
*(rbcur+i) = '\n';
return output_write (ri->output, ri->rowbuf, len, error);
}
/* Writes out RGB and grayscale raw rows */
static gboolean
pnmsaverow_raw (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
if (ri->bpc == 2)
{
gushort *d = (gushort *)data;
for (i = 0; i < ri->xres * ri->np; i++)
{
*d = g_htons(*d);
d++;
}
}
return output_write (ri->output, data, ri->xres * ri->np * ri->bpc, error);
}
/* Writes out RGB and grayscale float rows */
static gboolean
pnmsaverow_float (PNMRowInfo *ri,
const float *data,
GError **error)
{
return output_write (ri->output, data,
ri->xres * ri->np * sizeof (float),
error);
}
/* Writes out indexed raw rows */
static gboolean
pnmsaverow_raw_indexed (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
gchar *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres; i++)
{
*(rbcur++) = ri->red[*data];
*(rbcur++) = ri->grn[*data];
*(rbcur++) = ri->blu[*(data++)];
}
return output_write (ri->output, ri->rowbuf, ri->xres * 3, error);
}
/* Writes out RGB and grayscale ascii rows */
static gboolean
pnmsaverow_ascii (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
gchar *rbcur = ri->rowbuf;
gushort *sdata = (gushort *)data;
for (i = 0; i < ri->xres * ri->np; i++)
{
if (ri->bpc == 2)
{
sprintf ((gchar *) rbcur,"%d\n", 0xffff & *(sdata++));
}
else
{
sprintf ((gchar *) rbcur,"%d\n", 0xff & *(data++));
}
rbcur += strlen (rbcur);
}
return output_write (ri->output, ri->rowbuf, rbcur - ri->rowbuf,
error);
}
/* Writes out RGB and grayscale ascii rows */
static gboolean
pnmsaverow_ascii_indexed (PNMRowInfo *ri,
guchar *data,
GError **error)
{
gint i;
gchar *rbcur = ri->rowbuf;
for (i = 0; i < ri->xres; i++)
{
sprintf (rbcur, "%d\n", 0xff & ri->red[*(data)]);
rbcur += strlen (rbcur);
sprintf (rbcur, "%d\n", 0xff & ri->grn[*(data)]);
rbcur += strlen (rbcur);
sprintf (rbcur, "%d\n", 0xff & ri->blu[*(data++)]);
rbcur += strlen (rbcur);
}
return output_write (ri->output, ri->rowbuf, strlen ((char *) ri->rowbuf),
error);
}
static gboolean
save_image (GFile *file,
gint32 image_ID,
gint32 drawable_ID,
gboolean pbm,
gboolean float_format,
GError **error)
{
gboolean status = FALSE;
GOutputStream *output = NULL;
GeglBuffer *buffer = NULL;
const Babl *format;
const gchar *header_string = NULL;
GimpImageType drawable_type;
PNMRowInfo rowinfo;
PNMSaverowFunc saverow = NULL;
guchar red[256];
guchar grn[256];
guchar blu[256];
gchar buf[BUFLEN];
gint np = 0;
gint xres, yres;
gint ypos, yend;
gint rowbufsize = 0;
gchar *comment = NULL;
/* Make sure we're not saving an image with an alpha channel */
if (gimp_drawable_has_alpha (drawable_ID))
{
g_message (_("Cannot export images with alpha channel."));
goto out;
}
gimp_progress_init_printf (_("Exporting '%s'"),
g_file_get_parse_name (file));
/* open the file */
output = G_OUTPUT_STREAM (g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE,
NULL, error));
if (! output)
goto out;
buffer = gimp_drawable_get_buffer (drawable_ID);
xres = gegl_buffer_get_width (buffer);
yres = gegl_buffer_get_height (buffer);
drawable_type = gimp_drawable_type (drawable_ID);
switch (gimp_image_get_precision (image_ID))
{
case GIMP_PRECISION_U8_LINEAR:
case GIMP_PRECISION_U8_GAMMA:
rowinfo.bpc = 1;
break;
default:
rowinfo.bpc = 2;
break;
}
/* write out magic number */
if (!float_format && !psvals.raw)
{
if (pbm)
{
header_string = "P1\n";
format = gegl_buffer_get_format (buffer);
np = 0;
rowbufsize = xres + (int) (xres / 70) + 1;
saverow = pnmsaverow_ascii_pbm;
}
else
{
switch (drawable_type)
{
case GIMP_GRAY_IMAGE:
header_string = "P2\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("Y' u8");
rowbufsize = xres * 4;
}
else
{
format = babl_format ("Y' u16");
rowbufsize = xres * 6;
}
np = 1;
saverow = pnmsaverow_ascii;
break;
case GIMP_RGB_IMAGE:
header_string = "P3\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("R'G'B' u8");
rowbufsize = xres * 12;
}
else
{
format = babl_format ("R'G'B' u16");
rowbufsize = xres * 18;
}
np = 3;
saverow = pnmsaverow_ascii;
break;
case GIMP_INDEXED_IMAGE:
header_string = "P3\n";
format = gegl_buffer_get_format (buffer);
np = 1;
rowbufsize = xres * 12;
saverow = pnmsaverow_ascii_indexed;
break;
default:
g_warning ("PNM: Unknown drawable_type\n");
goto out;
}
}
}
else if (!float_format)
{
if (pbm)
{
header_string = "P4\n";
format = gegl_buffer_get_format (buffer);
np = 0;
rowbufsize = (gint) ceil ((gdouble) xres / 8.0);
saverow = pnmsaverow_raw_pbm;
}
else
{
switch (drawable_type)
{
case GIMP_GRAY_IMAGE:
header_string = "P5\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("Y' u8");
rowbufsize = xres;
}
else
{
format = babl_format ("Y' u16");
rowbufsize = xres * 2;
}
np = 1;
saverow = pnmsaverow_raw;
break;
case GIMP_RGB_IMAGE:
header_string = "P6\n";
if (rowinfo.bpc == 1)
{
format = babl_format ("R'G'B' u8");
rowbufsize = xres * 3;
}
else
{
format = babl_format ("R'G'B' u16");
rowbufsize = xres * 6;
}
np = 3;
saverow = pnmsaverow_raw;
break;
case GIMP_INDEXED_IMAGE:
header_string = "P6\n";
format = gegl_buffer_get_format (buffer);
np = 1;
rowbufsize = xres * 3;
saverow = pnmsaverow_raw_indexed;
break;
default:
g_warning ("PNM: Unknown drawable_type\n");
goto out;
}
}
}
else
{
switch (drawable_type)
{
case GIMP_GRAY_IMAGE:
header_string = "Pf\n";
format = babl_format ("Y float");
np = 1;
break;
case GIMP_RGB_IMAGE:
header_string = "PF\n";
format = babl_format ("RGB float");
np = 3;
break;
default:
g_warning ("PFM: Unknown drawable_type\n");
goto out;
}
}
if (! output_write (output, header_string, strlen (header_string), error))
goto out;
rowinfo.zero_is_black = FALSE;
if (drawable_type == GIMP_INDEXED_IMAGE)
{
guchar *cmap;
gint num_colors;
cmap = gimp_image_get_colormap (image_ID, &num_colors);
if (pbm)
{
/* Test which of the two colors is white and which is black */
switch (num_colors)
{
case 1:
rowinfo.zero_is_black = (GIMP_RGB_LUMINANCE (cmap[0],
cmap[1],
cmap[2]) < 128);
break;
case 2:
rowinfo.zero_is_black = (GIMP_RGB_LUMINANCE (cmap[0],
cmap[1],
cmap[2]) <
GIMP_RGB_LUMINANCE (cmap[3],
cmap[4],
cmap[5]));
break;
default:
g_warning ("Images exported as PBM should be black/white");
break;
}
}
else
{
const guchar *c = cmap;
gint i;
for (i = 0; i < num_colors; i++)
{
red[i] = *c++;
grn[i] = *c++;
blu[i] = *c++;
}
rowinfo.red = red;
rowinfo.grn = grn;
rowinfo.blu = blu;
}
g_free (cmap);
}
if (!float_format)
{
/* write out comment string */
comment = g_strdup_printf("# Created by GIMP version %s PNM plug-in\n",
GIMP_VERSION);
if (! output_write (output, comment, strlen (comment), error))
goto out;
}
/* write out resolution and maxval */
if (pbm)
g_snprintf (buf, sizeof (buf), "%d %d\n", xres, yres);
else if (!float_format)
g_snprintf (buf, sizeof (buf), "%d %d\n%d\n", xres, yres,
rowinfo.bpc == 1 ? 255 : 65535);
else
g_snprintf (buf, sizeof (buf), "%d %d\n%s\n", xres, yres,
G_BYTE_ORDER == G_BIG_ENDIAN ? "1.0" : "-1.0");
if (! output_write (output, buf, strlen (buf), error))
goto out;
if (!float_format)
{
guchar *data;
guchar *d;
gchar *rowbuf = NULL;
/* allocate a buffer for retrieving information from the pixel region */
data = g_new (guchar,
gimp_tile_height () * xres *
babl_format_get_bytes_per_pixel (format));
rowbuf = g_new (gchar, rowbufsize + 1);
rowinfo.output = output;
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);
gegl_buffer_get (buffer,
GEGL_RECTANGLE (0, ypos, xres, yend - ypos), 1.0,
format, data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
d = data;
}
if (! saverow (&rowinfo, d, error))
{
g_free (rowbuf);
g_free (data);
goto out;
}
d += xres * (np ? np : 1) * rowinfo.bpc;
if (ypos % 32 == 0)
gimp_progress_update ((double) ypos / (double) yres);
}
g_free (rowbuf);
g_free (data);
}
else
{
/* allocate a buffer for retrieving information from the pixel
region */
gfloat *data = g_new (gfloat, xres * np);
rowinfo.output = output;
rowinfo.rowbuf = NULL;
rowinfo.xres = xres;
rowinfo.np = np;
/* Write the body out in reverse row order */
for (ypos = yres - 1; ypos >= 0; ypos--)
{
gegl_buffer_get (buffer,
GEGL_RECTANGLE (0, ypos, xres, 1), 1.0,
format, data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
if (! pnmsaverow_float (&rowinfo, data, error))
{
g_free (data);
goto out;
}
if (ypos % 32 == 0)
gimp_progress_update ((double) (yres - ypos) / (double) yres);
}
g_free (data);
}
gimp_progress_update (1.0);
status = TRUE;
out:
if (! status)
{
GCancellable *cancellable = g_cancellable_new ();
g_cancellable_cancel (cancellable);
g_output_stream_close (output, cancellable, NULL);
g_object_unref (cancellable);
}
if (comment)
g_free (comment);
if (buffer)
g_object_unref (buffer);
if (output)
g_object_unref (output);
return status;
}
static gboolean
save_dialog (void)
{
GtkWidget *dialog;
GtkWidget *frame;
gboolean run;
dialog = gimp_export_dialog_new (_("PNM"), PLUG_IN_BINARY, PNM_SAVE_PROC);
/* file save type */
frame = gimp_int_radio_group_new (TRUE, _("Data formatting"),
G_CALLBACK (gimp_radio_button_update),
&psvals.raw, psvals.raw,
_("_Raw"), TRUE, NULL,
_("_ASCII"), FALSE, NULL,
NULL);
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (dialog)),
frame, FALSE, TRUE, 0);
gtk_widget_show (frame);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
/**************** 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 (GInputStream *input)
{
PNMScanner *s;
gsize bytes_read;
s = g_new (PNMScanner, 1);
s->input = input;
s->inbuf = NULL;
s->eof = FALSE;
if (! g_input_stream_read_all (input, &s->cur, 1,
&bytes_read, NULL, NULL) ||
bytes_read != 1)
{
s->eof = TRUE;
}
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)
{
gsize bytes_read;
s->inbuf = g_new (gchar, bufsize);
s->inbufsize = bufsize;
s->inbufpos = 0;
s->inbufvalidsize = 0;
g_input_stream_read_all (s->input, s->inbuf, bufsize,
&bytes_read, NULL, NULL);
s->inbufvalidsize = bytes_read;
}
/* pnmscanner_gettoken ---
* Gets the next token, eating any leading whitespace.
*/
static void
pnmscanner_gettoken (PNMScanner *s,
gchar *buf,
gint bufsize)
{
gint ctr = 0;
pnmscanner_eatwhitespace (s);
while (! s->eof &&
! g_ascii_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 && ! g_ascii_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->inbufpos > s->inbufvalidsize)
{
s->eof = 1;
}
else
{
gsize bytes_read;
g_input_stream_read_all (s->input, s->inbuf, s->inbufsize,
&bytes_read, NULL, NULL);
s->inbufvalidsize = bytes_read;
}
s->inbufpos = 0;
}
}
else
{
gsize bytes_read;
s->eof = FALSE;
if (! g_input_stream_read_all (s->input, &s->cur, 1,
&bytes_read, NULL, NULL) ||
bytes_read != 1)
{
s->eof = TRUE;
}
}
}
/* pnmscanner_eatwhitespace ---
* Eats up whitespace from the input and returns when done or eof.
* Also deals with comments.
*/
static void
pnmscanner_eatwhitespace (PNMScanner *s)
{
gint 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 (! g_ascii_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;
}
}
}