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- /* The GIMP -- an image manipulation program
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- * HRZ reading and writing code Copyright (C) 1996 Albert Cahalan
- *
- * 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: hrz.c,v 1.20 2000/12/17 20:07:15 tml Exp $ */
-
- /*
- * Albert Cahalan <acahalan at cs.uml.edu>, 1997 - Initial HRZ support.
- * Based on PNM code by Erik Nygren (nygren@mit.edu)
- *
- * Bug reports are wanted. I'd like to remove useless code.
- *
- * The HRZ file is always 256x240 with RGB values from 0 to 63.
- * No compression, no header, just the raw RGB data.
- * It is (was?) used for amatuer radio slow-scan TV.
- * That makes the size 256*240*3 = 184320 bytes.
- */
-
- #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>
- #ifdef HAVE_MMAP
- #include <sys/mman.h>
- #endif
-
- #ifdef G_OS_WIN32
- #include <io.h>
- #endif
-
- #ifndef _O_BINARY
- #define _O_BINARY 0
- #endif
-
- #include <libgimp/gimp.h>
- #include <libgimp/gimpui.h>
-
- #include "libgimp/stdplugins-intl.h"
-
-
- /* Declare local data types
- */
-
- typedef struct
- {
- gint run; /* run */
- } HRZSaveInterface;
-
-
- /* 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);
- */
-
- #define hrzscanner_eof(s) ((s)->eof)
- #define hrzscanner_fp(s) ((s)->fp)
-
- /* Checks for a fatal error */
- #define CHECK_FOR_ERROR(predicate, jmpbuf, errmsg) \
- if ((predicate)) \
- { /*gimp_message((errmsg));*/ longjmp((jmpbuf),1); }
-
- GimpPlugInInfo PLUG_IN_INFO =
- {
- NULL, /* init_proc */
- NULL, /* quit_proc */
- query, /* query_proc */
- run, /* run_proc */
- };
-
- /*
- static HRZSaveInterface 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" }
- };
- static gint nsave_args = sizeof (save_args) / sizeof (save_args[0]);
-
- gimp_install_procedure ("file_hrz_load",
- "loads files of the hrz file format",
- "FIXME: write help for hrz_load",
- "Albert Cahalan",
- "Albert Cahalan",
- "1997",
- "<Load>/HRZ",
- NULL,
- GIMP_PLUGIN,
- nload_args, nload_return_vals,
- load_args, load_return_vals);
-
- gimp_install_procedure ("file_hrz_save",
- "saves files in the hrz file format",
- "HRZ saving handles all image types except those with alpha channels.",
- "Albert Cahalan",
- "Albert Cahalan",
- "1997",
- "<Save>/HRZ",
- "RGB, GRAY",
- GIMP_PLUGIN,
- nsave_args, 0,
- save_args, NULL);
-
- gimp_register_magic_load_handler ("file_hrz_load",
- "hrz",
- "",
- "0,size,184320");
- gimp_register_save_handler ("file_hrz_save",
- "hrz",
- "");
- }
-
- 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 (strcmp (name, "file_hrz_load") == 0)
- {
- INIT_I18N();
- 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_hrz_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:
- INIT_I18N_UI();
- gimp_ui_init ("hrz", FALSE);
- export = gimp_export_image (&image_ID, &drawable_ID, "HRZ",
- (GIMP_EXPORT_CAN_HANDLE_RGB |
- GIMP_EXPORT_CAN_HANDLE_GRAY));
- if (export == GIMP_EXPORT_CANCEL)
- {
- values[0].data.d_status = GIMP_PDB_CANCEL;
- return;
- }
- break;
- default:
- INIT_I18N();
- break;
- }
-
- switch (run_mode)
- {
- case GIMP_RUN_INTERACTIVE:
- /* First acquire information with a dialog */
- /* Save dialog has no options (yet???)
- if (! save_dialog ())
- status = GIMP_PDB_CANCEL;
- */
- break;
-
- case GIMP_RUN_NONINTERACTIVE:
- /* Make sure all the arguments are there! */
- if (nparams != 4)
- status = GIMP_PDB_CALLING_ERROR;
- break;
-
- case GIMP_RUN_WITH_LAST_VALS:
- break;
-
- default:
- break;
- }
-
- if (status == GIMP_PDB_SUCCESS)
- {
- if (! save_image (param[3].data.d_string, image_ID, drawable_ID))
- {
- 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;
- }
-
- /************ load HRZ image row *********************/
- void
- do_hrz_load (void *mapped,
- GimpPixelRgn *pixel_rgn)
- {
- guchar *data, *d;
- gint x, y;
- gint start, end, scanlines;
-
- data = g_malloc (gimp_tile_height () * 256 * 3);
-
- for (y = 0; y < 240; )
- {
- start = y;
- end = y + gimp_tile_height ();
- end = MIN (end, 240);
- scanlines = end - start;
- d = data;
-
- memcpy (d, ((guchar *) mapped) + 256 * 3 * y,
- 256 * 3 * scanlines); /* this is gross */
-
- /* scale 0..63 into 0..255 properly */
- for (x = 0; x < 256 * 3 * scanlines; x++)
- d[x] = (d[x]>>4) | (d[x]<<2);
-
- d += 256 * 3 * y;
-
- gimp_progress_update ((double) y / 240.0);
- gimp_pixel_rgn_set_rect (pixel_rgn, data, 0, y, 256, scanlines);
- y += scanlines;
- }
-
- g_free (data);
- }
-
- /********************* Load HRZ image **********************/
- static gint32
- load_image (gchar *filename)
- {
- GimpPixelRgn pixel_rgn;
- gint32 image_ID;
- gint32 layer_ID;
- GimpDrawable *drawable;
- gint filedes;
- gchar *temp;
- void *mapped; /* memory mapped file data */
- struct stat statbuf; /* must check file size */
-
- temp = g_strdup_printf (_("Loading %s:"), filename);
- gimp_progress_init (temp);
- g_free (temp);
-
- /* open the file */
- filedes = open (filename, O_RDONLY | _O_BINARY);
-
- if (filedes == -1)
- {
- /* errno is set to indicate the error, but the user won't know :-( */
- /*gimp_message("hrz filter: can't open file\n");*/
- return -1;
- }
- /* stat the file to see if it is the right size */
- fstat (filedes, &statbuf);
- if (statbuf.st_size != 256*240*3)
- {
- g_message ("hrz: file is not HRZ type");
- return -1;
- }
- #ifdef HAVE_MMAP
- mapped = mmap(NULL, 256*240*3, PROT_READ, MAP_PRIVATE, filedes, 0);
- if (mapped == (void *)(-1))
- {
- g_message ("hrz: could not map file");
- return -1;
- }
- #else
- mapped = g_malloc(256*240*3);
- if (read (filedes, mapped, 256*240*3) != 256*240*3)
- {
- g_message ("hrz: file read error");
- return -1;
- }
- #endif
- close (filedes); /* not needed anymore, data is memory mapped */
-
- /* Create new image of proper size; associate filename */
- image_ID = gimp_image_new (256, 240, GIMP_RGB);
- gimp_image_set_filename (image_ID, filename);
-
- layer_ID = gimp_layer_new (image_ID, _("Background"),
- 256, 240,
- GIMP_RGB_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);
-
- do_hrz_load (mapped, &pixel_rgn);
-
- /* close the file */
- #ifdef HAVE_MMAP
- munmap (mapped, 256*240*3);
- #else
- g_free (mapped);
- #endif
-
- /* Tell the GIMP to display the image.
- */
- gimp_drawable_flush (drawable);
-
- return image_ID;
- }
-
- /************** Writes out RGB raw rows ************/
- static void
- saverow (FILE *fp,
- guchar *data)
- {
- gint loop = 256*3;
- guchar *walk = data;
- while (loop--)
- {
- *walk = (*walk >> 2);
- walk++;
- }
- fwrite (data, 1, 256 * 3, fp);
- }
-
- /********************* save image *********************/
- static gint
- save_image (gchar *filename,
- gint32 image_ID,
- gint32 drawable_ID)
- {
- GimpPixelRgn pixel_rgn;
- GimpDrawable *drawable;
- GimpImageType drawable_type;
- guchar *data;
- guchar *d; /* FIX */
- guchar *rowbuf;
- gchar *temp;
- gint np = 3;
- gint xres, yres;
- gint ypos, yend;
- FILE *fp;
-
- /* initialize */
-
- d = NULL;
-
- 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))
- {
- /* gimp_message ("HRZ save cannot handle images with alpha channels."); */
- return FALSE;
- }
-
- /* open the file */
- fp = fopen (filename, "wb");
- if (fp == NULL)
- {
- /* Ought to pass errno back... */
- g_message ("hrz: can't open \"%s\"\n", filename);
- return FALSE;
- }
-
- xres = drawable->width;
- yres = drawable->height;
-
- if ((xres != 256) || (yres != 240))
- {
- g_message ("hrz: Image must be 256x240 for HRZ format.");
- return FALSE;
- }
- if (drawable_type == GIMP_INDEXED_IMAGE)
- {
- g_message ("hrz: Image must be RGB or GRAY for HRZ format.");
- return FALSE;
- }
-
- temp = g_strdup_printf (_("Saving %s:"), filename);
- gimp_progress_init (temp);
- g_free (temp);
-
- /* allocate a buffer for retrieving information from the pixel region */
- data = (guchar *) g_malloc (gimp_tile_height () * drawable->width *
- drawable->bpp);
-
- rowbuf = g_malloc (256 * 3);
-
- /* 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 (fp, d);
- d += xres * np;
-
- if (!(ypos & 0x0f))
- gimp_progress_update ((double)ypos / 240.0 );
- }
-
- /* close the file */
- fclose (fp);
-
- g_free (rowbuf);
- g_free (data);
-
- gimp_drawable_detach (drawable);
-
- return TRUE;
- }
-
- /*********** Save dialog ************/
- /*
- static gint
- save_dialog (void)
- {
- GtkWidget *dlg;
-
- dlg = gimp_dialog_new (_("Save as HRZ"), "hrz",
- gimp_standard_help_func, "filters/hrz.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);
-
- 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));
- }
- */
-