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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., 675 Mass Ave, Cambridge, MA 02139, 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 <setjmp.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <unistd.h>
#include <sys/mman.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
/* Declare local data types
*/
typedef struct
{
gint run; /* run */
} HRZSaveInterface;
/* Declare some local functions.
*/
static void query (void);
static void run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static gint32 load_image (char *filename);
static gint save_image (char *filename,
gint32 image_ID,
gint32 drawable_ID);
static gint save_dialog ();
static void save_close_callback (GtkWidget *widget, gpointer data);
static void save_ok_callback (GtkWidget *widget,
gpointer data);
/*
static void save_toggle_update (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); }
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static HRZSaveInterface psint =
{
FALSE /* run */
};
MAIN ()
static void
query ()
{
static GParamDef load_args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_STRING, "filename", "The name of the file to load" },
{ PARAM_STRING, "raw_filename", "The name of the file to load" },
};
static GParamDef load_return_vals[] =
{
{ PARAM_IMAGE, "image", "Output image" },
};
static int nload_args = sizeof (load_args) / sizeof (load_args[0]);
static int nload_return_vals = sizeof (load_return_vals) / sizeof (load_return_vals[0]);
static GParamDef save_args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image" },
{ PARAM_DRAWABLE, "drawable", "Drawable to save" },
{ PARAM_STRING, "filename", "The name of the file to save the image in" },
{ PARAM_STRING, "raw_filename", "The name of the file to save the image in" }
};
static int 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,
PROC_PLUG_IN,
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*, INDEXED*",
PROC_PLUG_IN,
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 (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals)
{
static GParam values[2];
GRunModeType run_mode;
GStatusType status = STATUS_SUCCESS;
gint32 image_ID;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = STATUS_CALLING_ERROR;
if (strcmp (name, "file_hrz_load") == 0)
{
image_ID = load_image (param[1].data.d_string);
if (image_ID != -1)
{
*nreturn_vals = 2;
values[0].data.d_status = STATUS_SUCCESS;
values[1].type = PARAM_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
values[0].data.d_status = STATUS_EXECUTION_ERROR;
}
}
else if (strcmp (name, "file_hrz_save") == 0)
{
switch (run_mode)
{
case RUN_INTERACTIVE:
/* First acquire information with a dialog */
if (! save_dialog ())
return;
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 4)
status = STATUS_CALLING_ERROR;
case RUN_WITH_LAST_VALS:
break;
default:
break;
}
*nreturn_vals = 1;
if (save_image (param[3].data.d_string, param[1].data.d_int32, param[2].data.d_int32))
{
values[0].data.d_status = STATUS_SUCCESS;
}
else
values[0].data.d_status = STATUS_EXECUTION_ERROR;
}
}
/************ load HRZ image row *********************/
void
do_hrz_load(void *mapped, GPixelRgn *pixel_rgn)
{
unsigned char *data, *d;
int x, y;
int 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, ((unsigned char *) 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 (char *filename)
{
GPixelRgn pixel_rgn;
gint32 image_ID;
gint32 layer_ID;
GDrawable *drawable;
int filedes;
char *temp;
void *mapped; /* memory mapped file data */
struct stat statbuf; /* must check file size */
temp = g_malloc (strlen (filename) + 11);
sprintf (temp, "Loading %s:", filename);
gimp_progress_init (temp);
g_free (temp);
/* open the file */
filedes = open(filename, O_RDONLY);
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)
{
fprintf(stderr, "hrz filter: file is not HRZ type\n");
return -1;
}
mapped = mmap(NULL, 256*240*3, PROT_READ, MAP_PRIVATE, filedes, 0);
if(mapped == (void *)(-1))
{
fprintf(stderr, "hrz filter: could not map file\n");
return -1;
}
close (filedes); /* not needed anymore, data is memory mapped */
/* Create new image of proper size; associate filename */
image_ID = gimp_image_new (256, 240, RGB);
gimp_image_set_filename (image_ID, filename);
layer_ID = gimp_layer_new (image_ID, "Background",
256, 240,
RGB_IMAGE, 100, 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 */
munmap(mapped, 256*240*3);
/* Tell the GIMP to display the image.
*/
gimp_drawable_flush (drawable);
return image_ID;
}
/************** Writes out RGB raw rows ************/
static void
saverow (FILE *fp, unsigned char *data)
{
int loop = 256*3;
unsigned char *walk = data;
while(loop--)
{
*walk = (*walk >> 2);
walk++;
}
fwrite(data, 1, 256*3, fp);
}
/********************* save image *********************/
static gint
save_image (char *filename,
gint32 image_ID,
gint32 drawable_ID)
{
GPixelRgn pixel_rgn;
GDrawable *drawable;
GDrawableType drawable_type;
unsigned char *data;
unsigned char *d; /* FIX */
unsigned char *rowbuf;
char *temp;
int np = 3;
int xres, yres;
int 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... */
fprintf (stderr, "hrz: can't open \"%s\"\n", filename);
return FALSE;
}
xres = drawable->width;
yres = drawable->height;
if ((xres != 256) || (yres != 240))
{
fprintf (stderr, "hrz: Image must be 256x240 for HRZ format.\n");
return FALSE;
}
if (drawable_type == INDEXED_IMAGE)
{
fprintf (stderr, "hrz: Image must be RGB for HRZ format.\n");
return FALSE;
}
temp = g_malloc (strlen (filename) + 11);
sprintf (temp, "Saving %s:", filename);
gimp_progress_init (temp);
g_free (temp);
/* allocate a buffer for retrieving information from the pixel region */
data = (unsigned char *) 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 ()
{
GtkWidget *dlg;
GtkWidget *button;
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("save");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Save as HRZ");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) save_close_callback,
NULL);
/* Action area */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) save_ok_callback,
dlg);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Cancel");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT (dlg));
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
gtk_widget_show (button);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return psint.run;
}
/********** Save interface functions **********/
static void
save_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
save_ok_callback (GtkWidget *widget,
gpointer data)
{
psint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
/*
static void
save_toggle_update (GtkWidget *widget,
gpointer data)
{
int *toggle_val;
toggle_val = (int *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
*toggle_val = TRUE;
else
*toggle_val = FALSE;
}
*/
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