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gimp/plug-ins/common/hrz.c

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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.
*/
/* $Id$ */
/*
* 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
#include <glib.h> /* for G_OS_* */
#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,
GTK_STOCK_OK, save_ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
GTK_STOCK_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));
}
*/
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