home *** CD-ROM | disk | FTP | other *** search
- /* 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: pnm.c,v 1.26 2000/12/17 16:50:00 mitch Exp $ */
-
- /*
- * 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;
- }
- }
- }
-