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gimp/plug-ins/common/sunras.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* SUN raster reading and writing code Copyright (C) 1996 Peter Kirchgessner
* (email: peter@kirchgessner.net, WWW: http://www.kirchgessner.net)
*
* 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.
*
*/
/* This program was written using pages 625-629 of the book
* "Encyclopedia of Graphics File Formats", Murray/van Ryper,
* O'Reilly & Associates Inc.
* Bug reports or suggestions should be e-mailed to peter@kirchgessner.net
*/
/* Event history:
* V 1.00, PK, 25-Jul-96: First try
* V 1.90, PK, 15-Mar-97: Upgrade to work with GIMP V0.99
* V 1.91, PK, 05-Apr-97: Return all arguments, even in case of an error
* V 1.92, PK, 18-May-97: Ignore EOF-error on reading image data
* V 1.93, PK, 05-Oct-97: Parse rc file
* V 1.94, PK, 12-Oct-97: No progress bars for non-interactive mode
* V 1.95, nn, 20-Dec-97: Initialize some variable
* V 1.96, PK, 21-Nov-99: Internationalization
* V 1.97, PK, 20-Dec-00: Recognize extensions .rs and .ras too
*/
static char ident[] = "@(#) GIMP SunRaster file-plugin v1.97 20-Dec-00";
#include "config.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
typedef int WRITE_FUN(void*,size_t,size_t,FILE*);
typedef gulong L_CARD32;
typedef gushort L_CARD16;
typedef guchar L_CARD8;
/* Fileheader of SunRaster files */
typedef struct
{
L_CARD32 l_ras_magic; /* Magic Number */
L_CARD32 l_ras_width; /* Width */
L_CARD32 l_ras_height; /* Height */
L_CARD32 l_ras_depth; /* Number of bits per pixel (1,8,24,32) */
L_CARD32 l_ras_length; /* Length of image data (but may also be 0) */
L_CARD32 l_ras_type; /* Encoding */
L_CARD32 l_ras_maptype; /* Type of colormap */
L_CARD32 l_ras_maplength;/* Number of bytes for colormap */
} L_SUNFILEHEADER;
/* Sun-raster magic */
#define RAS_MAGIC 0x59a66a95
#define RAS_TYPE_STD 1 /* Standard uncompressed format */
#define RAS_TYPE_RLE 2 /* Runlength compression format */
typedef struct
{
gint val; /* The value that is to be repeated */
gint n; /* How many times it is repeated */
} RLEBUF;
/* 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 (const gchar *filename);
static gint save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID);
static void set_color_table (gint32, L_SUNFILEHEADER *, unsigned char *);
static gint32 create_new_image (const gchar *filename,
guint width,
guint height,
GimpImageBaseType type,
gint32 *layer_ID,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn);
static gint32 load_sun_d1 (const gchar *,
FILE *, L_SUNFILEHEADER *, unsigned char *);
static gint32 load_sun_d8 (const gchar *,
FILE *, L_SUNFILEHEADER *, unsigned char *);
static gint32 load_sun_d24 (const gchar *,
FILE *, L_SUNFILEHEADER *, unsigned char *);
static gint32 load_sun_d32 (const gchar *,
FILE *, L_SUNFILEHEADER *, unsigned char *);
static L_CARD32 read_card32 (FILE *, int *);
static void write_card32 (FILE *, L_CARD32);
static void byte2bit (unsigned char *, int, unsigned char *, int);
static void rle_startread (FILE *);
static int rle_fread (char *, int, int, FILE *);
static int rle_fgetc (FILE *);
#define rle_getc(fp) ((rlebuf.n > 0) ? (rlebuf.n)--,rlebuf.val : rle_fgetc (fp))
static void rle_startwrite (FILE *);
static int rle_fwrite (char *, int, int, FILE *);
static int rle_fputc (int, FILE *);
static int rle_putrun (int, int, FILE *);
static void rle_endwrite (FILE *);
#define rle_putc rle_fputc
static void read_sun_header (FILE *, L_SUNFILEHEADER *);
static void write_sun_header (FILE *, L_SUNFILEHEADER *);
static void read_sun_cols (FILE *, L_SUNFILEHEADER *, unsigned char *);
static void write_sun_cols (FILE *, L_SUNFILEHEADER *, unsigned char *);
static gint save_index (FILE *, gint32, gint32 , int, int);
static gint save_rgb (FILE *, gint32, gint32, int);
static int read_msb_first = 1;
static RLEBUF rlebuf;
/* Dialog-handling */
static gint save_dialog (void);
/* Portability kludge */
static int my_fwrite (void *ptr, int size, int nmemb, FILE *stream);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* Save info */
typedef struct
{
gboolean rle; /* rle or standard */
} SUNRASSaveVals;
static SUNRASSaveVals psvals =
{
TRUE /* rle */
};
/* The run mode */
static GimpRunMode l_run_mode;
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 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, "rle", "Specify non-zero for rle output, zero for standard output" }
};
gimp_install_procedure ("file_sunras_load",
"load file of the SunRaster file format",
"load file of the SunRaster file format",
"Peter Kirchgessner",
"Peter Kirchgessner",
"1996",
"<Load>/SUNRAS",
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_install_procedure ("file_sunras_save",
"save file in the SunRaster file format",
"SUNRAS saving handles all image types except "
"those with alpha channels.",
"Peter Kirchgessner",
"Peter Kirchgessner",
"1996",
"<Save>/SUNRAS",
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
/* Magic information for sunras would be "0,long,0x59a66a95" */
gimp_register_magic_load_handler ("file_sunras_load",
"im1,im8,im24,im32,rs,ras",
"",
"0,long,0x59a66a95");
gimp_register_save_handler ("file_sunras_save",
"im1,im8,im24,im32,rs,ras",
"");
}
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;
l_run_mode = run_mode = param[0].data.d_int32;
INIT_I18N ();
*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_sunras_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_sunras_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 ("sunras", FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "SUNRAS",
(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_sunras_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.rle = (param[5].data.d_int32) ? TRUE : FALSE;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("file_sunras_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_sunras_save", &psvals,
sizeof (SUNRASSaveVals));
}
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 (const gchar *filename)
{
gint32 image_ID;
FILE *ifp;
char *temp = ident; /* Just to satisfy gcc/lint */
L_SUNFILEHEADER sunhdr;
guchar *suncolmap = NULL;
ifp = fopen (filename, "rb");
if (!ifp)
{
g_message (_("Could not open '%s' for reading: %s"),
filename, g_strerror (errno));
return -1;
}
read_msb_first = 1; /* SUN raster is always most significant byte first */
read_sun_header (ifp, &sunhdr);
if (sunhdr.l_ras_magic != RAS_MAGIC)
{
g_message (_("Could not open '%s' as SUN-raster-file"), filename);
fclose (ifp);
return (-1);
}
if ((sunhdr.l_ras_type < 0) || (sunhdr.l_ras_type > 5))
{
g_message (_("The type of this SUN-rasterfile is not supported"));
fclose (ifp);
return (-1);
}
/* Is there a RGB colourmap ? */
if ((sunhdr.l_ras_maptype == 1) && (sunhdr.l_ras_maplength > 0))
{
suncolmap = g_new (guchar, sunhdr.l_ras_maplength);
read_sun_cols (ifp, &sunhdr, suncolmap);
#ifdef DEBUG
{
int j, ncols;
printf ("File %s\n",filename);
ncols = sunhdr.l_ras_maplength/3;
for (j=0; j < ncols; j++)
printf ("Entry 0x%08x: 0x%04x, 0x%04x, 0x%04x\n",
j,suncolmap[j],suncolmap[j+ncols],suncolmap[j+2*ncols]);
}
#endif
if (sunhdr.l_ras_magic != RAS_MAGIC)
{
g_message (_("Could not read color entries from '%s'"),
filename);
fclose (ifp);
return (-1);
}
}
else if (sunhdr.l_ras_maplength > 0)
{
g_message (_("Type of colormap not supported"));
fseek (ifp, (sizeof (L_SUNFILEHEADER)/sizeof (L_CARD32))
*4 + sunhdr.l_ras_maplength, SEEK_SET);
}
temp = g_strdup_printf (_("Opening '%s'..."), filename);
gimp_progress_init (temp);
g_free (temp);
switch (sunhdr.l_ras_depth)
{
case 1: /* bitmap */
image_ID = load_sun_d1 (filename, ifp, &sunhdr, suncolmap);
break;
case 8: /* 256 colours */
image_ID = load_sun_d8 (filename, ifp, &sunhdr, suncolmap);
break;
case 24: /* True color */
image_ID = load_sun_d24 (filename, ifp, &sunhdr, suncolmap);
break;
case 32: /* True color with extra byte */
image_ID = load_sun_d32 (filename, ifp, &sunhdr, suncolmap);
break;
default:
image_ID = -1;
break;
}
fclose (ifp);
g_free (suncolmap);
if (image_ID == -1)
{
g_message (_("This image depth is not supported"));
return (-1);
}
return (image_ID);
}
static gint
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID)
{
FILE* ofp;
GimpImageType drawable_type;
gint retval;
char *temp;
drawable_type = gimp_drawable_type (drawable_ID);
/* Make sure we're not saving an image with an alpha channel */
if (gimp_drawable_has_alpha (drawable_ID))
{
g_message (_("SUNRAS save cannot handle images with alpha channels"));
return FALSE;
}
switch (drawable_type)
{
case GIMP_INDEXED_IMAGE:
case GIMP_GRAY_IMAGE:
case GIMP_RGB_IMAGE:
break;
default:
g_message (_("Can't operate on unknown image types"));
return (FALSE);
break;
}
/* Open the output file. */
ofp = fopen (filename, "wb");
if (!ofp)
{
g_message (_("Could not open '%s' for writing: %s"),
filename, g_strerror (errno));
return FALSE;
}
temp = g_strdup_printf (_("Saving '%s'..."), filename);
gimp_progress_init (temp);
g_free (temp);
if (drawable_type == GIMP_INDEXED_IMAGE)
retval = save_index (ofp,image_ID, drawable_ID, 0, (int)psvals.rle);
else if (drawable_type == GIMP_GRAY_IMAGE)
retval = save_index (ofp,image_ID, drawable_ID, 1, (int)psvals.rle);
else if (drawable_type == GIMP_RGB_IMAGE)
retval = save_rgb (ofp,image_ID, drawable_ID, (int)psvals.rle);
else
retval = FALSE;
fclose (ofp);
return (retval);
}
static L_CARD32
read_card32 (FILE *ifp,
gint *err)
{
L_CARD32 c;
if (read_msb_first)
{
c = (((L_CARD32)(getc (ifp))) << 24);
c |= (((L_CARD32)(getc (ifp))) << 16);
c |= (((L_CARD32)(getc (ifp))) << 8);
c |= ((L_CARD32)(*err = getc (ifp)));
}
else
{
c = ((L_CARD32)(getc (ifp)));
c |= (((L_CARD32)(getc (ifp))) << 8);
c |= (((L_CARD32)(getc (ifp))) << 16);
c |= (((L_CARD32)(*err = getc (ifp))) << 24);
}
*err = (*err < 0);
return (c);
}
static void
write_card32 (FILE *ofp,
L_CARD32 c)
{
putc ((int)((c >> 24) & 0xff), ofp);
putc ((int)((c >> 16) & 0xff), ofp);
putc ((int)((c >> 8) & 0xff), ofp);
putc ((int)((c) & 0xff), ofp);
}
/* Convert n bytes of 0/1 to a line of bits */
static void
byte2bit (guchar *byteline,
gint width,
guchar *bitline,
gint invert)
{
register guchar bitval;
guchar rest[8];
while (width >= 8)
{
bitval = 0;
if (*(byteline++)) bitval |= 0x80;
if (*(byteline++)) bitval |= 0x40;
if (*(byteline++)) bitval |= 0x20;
if (*(byteline++)) bitval |= 0x10;
if (*(byteline++)) bitval |= 0x08;
if (*(byteline++)) bitval |= 0x04;
if (*(byteline++)) bitval |= 0x02;
if (*(byteline++)) bitval |= 0x01;
*(bitline++) = invert ? ~bitval : bitval;
width -= 8;
}
if (width > 0)
{
memset (rest, 0, 8);
memcpy (rest, byteline, width);
bitval = 0;
byteline = rest;
if (*(byteline++)) bitval |= 0x80;
if (*(byteline++)) bitval |= 0x40;
if (*(byteline++)) bitval |= 0x20;
if (*(byteline++)) bitval |= 0x10;
if (*(byteline++)) bitval |= 0x08;
if (*(byteline++)) bitval |= 0x04;
if (*(byteline++)) bitval |= 0x02;
*bitline = invert ? ~bitval : bitval;
}
}
/* Start reading Runlength Encoded Data */
static void
rle_startread (FILE *ifp)
{ /* Clear RLE-buffer */
rlebuf.val = rlebuf.n = 0;
}
/* Read uncompressed elements from RLE-stream */
static gint
rle_fread (gchar *ptr,
gint sz,
gint nelem,
FILE *ifp)
{
int elem_read, cnt, val, err = 0;
for (elem_read = 0; elem_read < nelem; elem_read++)
{
for (cnt = 0; cnt < sz; cnt++)
{
val = rle_getc (ifp);
if (val < 0) { err = 1; break; }
*(ptr++) = (char)val;
}
if (err) break;
}
return (elem_read);
}
/* Get one byte of uncompressed data from RLE-stream */
static gint
rle_fgetc (FILE *ifp)
{
int flag, runcnt, runval;
if (rlebuf.n > 0) /* Something in the buffer ? */
{
(rlebuf.n)--;
return (rlebuf.val);
}
/* Nothing in the buffer. We have to read something */
if ((flag = getc (ifp)) < 0) return (-1);
if (flag != 0x0080) return (flag); /* Single byte run ? */
if ((runcnt = getc (ifp)) < 0) return (-1);
if (runcnt == 0) return (0x0080); /* Single 0x80 ? */
/* The run */
if ((runval = getc (ifp)) < 0) return (-1);
rlebuf.n = runcnt;
rlebuf.val = runval;
return (runval);
}
/* Start writing Runlength Encoded Data */
static void
rle_startwrite (FILE *ofp)
{ /* Clear RLE-buffer */
rlebuf.val = rlebuf.n = 0;
}
/* Write uncompressed elements to RLE-stream */
static gint
rle_fwrite (gchar *ptr,
gint sz,
gint nelem,
FILE *ofp)
{
int elem_write, cnt, val, err = 0;
guchar *pixels = (unsigned char *)ptr;
for (elem_write = 0; elem_write < nelem; elem_write++)
{
for (cnt = 0; cnt < sz; cnt++)
{
val = rle_fputc (*(pixels++), ofp);
if (val < 0) { err = 1; break; }
}
if (err) break;
}
return (elem_write);
}
/* Write uncompressed character to RLE-stream */
static gint
rle_fputc (gint val,
FILE *ofp)
{
int retval;
if (rlebuf.n == 0) /* Nothing in the buffer ? Save the value */
{
rlebuf.n = 1;
return (rlebuf.val = val);
}
/* Something in the buffer */
if (rlebuf.val == val) /* Same value in the buffer ? */
{
(rlebuf.n)++;
if (rlebuf.n == 257) /* Can not be encoded in a single run ? */
{
retval = rle_putrun (256, rlebuf.val, ofp);
if (retval < 0) return (retval);
rlebuf.n -= 256;
}
return (val);
}
/* Something different in the buffer ? Write out the run */
retval = rle_putrun (rlebuf.n, rlebuf.val, ofp);
if (retval < 0) return (retval);
/* Save the new value */
rlebuf.n = 1;
return (rlebuf.val = val);
}
/* Write out a run with 0 < n < 257 */
static gint
rle_putrun (gint n,
gint val,
FILE *ofp)
{
int retval, flag = 0x80;
/* Useful to write a 3 byte run ? */
if ((n > 2) || ((n == 2) && (val == flag)))
{
putc (flag, ofp);
putc (n-1, ofp);
retval = putc (val, ofp);
}
else if (n == 2) /* Write two single runs (could not be value 0x80) */
{
putc (val, ofp);
retval = putc (val, ofp);
}
else /* Write a single run */
{
if (val == flag)
retval = putc (flag, ofp), putc (0x00, ofp);
else
retval = putc (val, ofp);
}
return ((retval < 0) ? retval : val);
}
/* End writing Runlength Encoded Data */
static void
rle_endwrite (FILE *ofp)
{
if (rlebuf.n > 0)
{
rle_putrun (rlebuf.n, rlebuf.val, ofp);
rlebuf.val = rlebuf.n = 0; /* Clear RLE-buffer */
}
}
static void
read_sun_header (FILE *ifp,
L_SUNFILEHEADER *sunhdr)
{
int j, err;
L_CARD32 *cp;
cp = (L_CARD32 *)sunhdr;
/* Read in all 32-bit values of the header and check for byte order */
for (j = 0; j < sizeof (L_SUNFILEHEADER)/sizeof(sunhdr->l_ras_magic); j++)
{
*(cp++) = read_card32 (ifp, &err);
if (err) break;
}
if (err) sunhdr->l_ras_magic = 0; /* Not a valid SUN-raster file */
}
/* Write out a SUN-fileheader */
static void
write_sun_header (FILE *ofp,
L_SUNFILEHEADER *sunhdr)
{
int j, hdr_entries;
L_CARD32 *cp;
hdr_entries = sizeof (L_SUNFILEHEADER)/sizeof(sunhdr->l_ras_magic);
cp = (L_CARD32 *)sunhdr;
/* Write out all 32-bit values of the header and check for byte order */
for (j = 0; j < sizeof (L_SUNFILEHEADER)/sizeof(sunhdr->l_ras_magic); j++)
{
write_card32 (ofp, *(cp++));
}
}
/* Read the sun colourmap */
static void
read_sun_cols (FILE *ifp,
L_SUNFILEHEADER *sunhdr,
guchar *colormap)
{
int ncols, err = 0;
/* Read in SUN-raster Colormap */
ncols = sunhdr->l_ras_maplength / 3;
if (ncols <= 0)
err = 1;
else
err = (fread (colormap, 3, ncols, ifp) != ncols);
if (err) sunhdr->l_ras_magic = 0; /* Not a valid SUN-raster file */
}
/* Write a sun colourmap */
static void
write_sun_cols (FILE *ofp,
L_SUNFILEHEADER *sunhdr,
guchar *colormap)
{
int ncols;
ncols = sunhdr->l_ras_maplength / 3;
fwrite (colormap, 3, ncols, ofp);
}
/* Set a GIMP colourtable using the sun colourmap */
static void
set_color_table (gint32 image_ID,
L_SUNFILEHEADER *sunhdr,
guchar *suncolmap)
{
int ncols, j;
guchar ColorMap[256*3];
ncols = sunhdr->l_ras_maplength / 3;
if (ncols <= 0) return;
for (j = 0; j < ncols; j++)
{
ColorMap[j*3] = suncolmap[j];
ColorMap[j*3+1] = suncolmap[j+ncols];
ColorMap[j*3+2] = suncolmap[j+2*ncols];
}
#ifdef DEBUG
printf ("Set GIMP colortable:\n");
for (j = 0; j < ncols; j++)
printf ("%3d: 0x%02x 0x%02x 0x%02x\n", j,
ColorMap[j*3], ColorMap[j*3+1], ColorMap[j*3+2]);
#endif
gimp_image_set_cmap (image_ID, ColorMap, ncols);
}
/* Create an image. Sets layer_ID, drawable and rgn. Returns image_ID */
static gint32
create_new_image (const gchar *filename,
guint width,
guint height,
GimpImageBaseType type,
gint32 *layer_ID,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn)
{
gint32 image_ID;
GimpImageType gdtype;
switch (type)
{
case GIMP_RGB:
gdtype = GIMP_RGB_IMAGE;
break;
case GIMP_GRAY:
gdtype = GIMP_GRAY_IMAGE;
break;
case GIMP_INDEXED:
gdtype = GIMP_INDEXED_IMAGE;
break;
default:
g_warning ("Unsupported image type");
return -1;
}
image_ID = gimp_image_new (width, height, type);
gimp_image_set_filename (image_ID, filename);
*layer_ID = gimp_layer_new (image_ID, _("Background"), width, height,
gdtype, 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);
return (image_ID);
}
/* Load SUN-raster-file with depth 1 */
static gint32
load_sun_d1 (const gchar *filename,
FILE *ifp,
L_SUNFILEHEADER *sunhdr,
guchar *suncolmap)
{
register int pix8;
int width, height, linepad, scan_lines, tile_height;
int i, j;
guchar *dest, *data;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
guchar bit2byte[256*8];
L_SUNFILEHEADER sun_bwhdr;
guchar sun_bwcolmap[6] = { 255,0,255,0,255,0 };
int err = 0, rle = (sunhdr->l_ras_type == RAS_TYPE_RLE);
width = sunhdr->l_ras_width;
height = sunhdr->l_ras_height;
image_ID = create_new_image (filename, width, height, GIMP_INDEXED,
&layer_ID, &drawable, &pixel_rgn);
tile_height = gimp_tile_height ();
data = g_malloc (tile_height * width);
if (suncolmap != NULL) /* Set up the specified colour map */
{
set_color_table (image_ID, sunhdr, suncolmap);
}
else /* No colourmap available. Set up a dummy b/w-colourmap */
{ /* Copy the original header and simulate b/w-colourmap */
memcpy ((char *)&sun_bwhdr,(char *)sunhdr,sizeof (L_SUNFILEHEADER));
sun_bwhdr.l_ras_maptype = 2;
sun_bwhdr.l_ras_maplength = 6;
set_color_table (image_ID, &sun_bwhdr, sun_bwcolmap);
}
/* Get an array for mapping 8 bits in a byte to 8 bytes */
dest = bit2byte;
for (j = 0; j < 256; j++)
for (i = 7; i >= 0; i--)
*(dest++) = ((j & (1 << i)) != 0);
linepad = (((sunhdr->l_ras_width+7)/8) % 2); /* Check for 16bit align */
if (rle) rle_startread (ifp);
dest = data;
scan_lines = 0;
for (i = 0; i < height; i++)
{
j = width;
while (j >= 8)
{
pix8 = rle ? rle_getc (ifp) : getc (ifp);
if (pix8 < 0) { err = 1; pix8 = 0; }
memcpy (dest, bit2byte + pix8*8, 8);
dest += 8;
j -= 8;
}
if (j > 0)
{
pix8 = rle ? rle_getc (ifp) : getc (ifp);
if (pix8 < 0) { err = 1; pix8 = 0; }
memcpy (dest, bit2byte + pix8*8, j);
dest += j;
}
if (linepad)
err |= ((rle ? rle_getc (ifp) : getc (ifp)) < 0);
scan_lines++;
if ((i % 20) == 0)
gimp_progress_update ((double)(i+1) / (double)height);
if ((scan_lines == tile_height) || ((i+1) == height))
{
gimp_pixel_rgn_set_rect (&pixel_rgn, data, 0, i-scan_lines+1,
width, scan_lines);
scan_lines = 0;
dest = data;
}
}
g_free (data);
if (err)
g_message (_("EOF encountered on reading"));
gimp_drawable_flush (drawable);
return (image_ID);
}
/* Load SUN-raster-file with depth 8 */
static gint32
load_sun_d8 (const gchar *filename,
FILE *ifp,
L_SUNFILEHEADER *sunhdr,
guchar *suncolmap)
{
int width, height, linepad, i, j;
int greyscale, ncols;
int scan_lines, tile_height;
guchar *dest, *data;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
int err = 0, rle = (sunhdr->l_ras_type == RAS_TYPE_RLE);
width = sunhdr->l_ras_width;
height = sunhdr->l_ras_height;
/* This could also be a greyscale image. Check it */
ncols = sunhdr->l_ras_maplength / 3;
greyscale = 1; /* Also greyscale if no colourmap present */
if ((ncols > 0) && (suncolmap != NULL))
{
for (j = 0; j < ncols; j++)
{
if ( (suncolmap[j] != j)
|| (suncolmap[j+ncols] != j)
|| (suncolmap[j+2*ncols] != j))
{
greyscale = 0;
break;
}
}
}
image_ID = create_new_image (filename, width, height,
greyscale ? GIMP_GRAY : GIMP_INDEXED,
&layer_ID, &drawable, &pixel_rgn);
tile_height = gimp_tile_height ();
data = g_malloc (tile_height * width);
if (!greyscale)
set_color_table (image_ID, sunhdr, suncolmap);
linepad = (sunhdr->l_ras_width % 2);
if (rle) rle_startread (ifp); /* Initialize RLE-buffer */
dest = data;
scan_lines = 0;
for (i = 0; i < height; i++)
{
memset ((char *)dest, 0, width);
err |= ((rle ? rle_fread ((char *)dest, 1, width, ifp)
: fread ((char *)dest, 1, width, ifp)) != width);
if (linepad)
err |= ((rle ? rle_getc (ifp) : getc (ifp)) < 0);
dest += width;
scan_lines++;
if ((i % 20) == 0)
gimp_progress_update ((double)(i+1) / (double)height);
if ((scan_lines == tile_height) || ((i+1) == height))
{
gimp_pixel_rgn_set_rect (&pixel_rgn, data, 0, i-scan_lines+1,
width, scan_lines);
scan_lines = 0;
dest = data;
}
}
g_free (data);
if (err)
g_message (_("EOF encountered on reading"));
gimp_drawable_flush (drawable);
return (image_ID);
}
/* Load SUN-raster-file with depth 24 */
static gint32
load_sun_d24 (const gchar *filename,
FILE *ifp,
L_SUNFILEHEADER *sunhdr,
guchar *suncolmap)
{
register guchar *dest, blue;
guchar *data;
int width, height, linepad, tile_height, scan_lines;
int i, j;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
int err = 0, rle = (sunhdr->l_ras_type == RAS_TYPE_RLE);
width = sunhdr->l_ras_width;
height = sunhdr->l_ras_height;
image_ID = create_new_image (filename, width, height, GIMP_RGB,
&layer_ID, &drawable, &pixel_rgn);
tile_height = gimp_tile_height ();
data = g_malloc (tile_height * width * 3);
linepad = ((sunhdr->l_ras_width*3) % 2);
if (rle) rle_startread (ifp); /* Initialize RLE-buffer */
dest = data;
scan_lines = 0;
for (i = 0; i < height; i++)
{
memset ((char *)dest, 0, 3*width);
err |= ((rle ? rle_fread ((char *)dest, 3, width, ifp)
: fread ((char *)dest, 3, width, ifp)) != width);
if (linepad)
err |= ((rle ? rle_getc (ifp) : getc (ifp)) < 0);
if (sunhdr->l_ras_type == 3) /* RGB-format ? That is what GIMP wants */
{
dest += width*3;
}
else /* We have BGR format. Correct it */
{
for (j = 0; j < width; j++)
{
blue = *dest;
*dest = *(dest+2);
*(dest+2) = blue;
dest += 3;
}
}
scan_lines++;
if ((i % 20) == 0)
gimp_progress_update ((double)(i+1) / (double)height);
if ((scan_lines == tile_height) || ((i+1) == height))
{
gimp_pixel_rgn_set_rect (&pixel_rgn, data, 0, i-scan_lines+1,
width, scan_lines);
scan_lines = 0;
dest = data;
}
}
g_free (data);
if (err)
g_message (_("EOF encountered on reading"));
gimp_drawable_flush (drawable);
return (image_ID);
}
/* Load SUN-raster-file with depth 32 */
static gint32
load_sun_d32 (const gchar *filename,
FILE *ifp,
L_SUNFILEHEADER *sunhdr,
guchar *suncolmap)
{
register guchar *dest, blue;
guchar *data;
int width, height, tile_height, scan_lines;
int i, j;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
int err = 0, cerr, rle = (sunhdr->l_ras_type == RAS_TYPE_RLE);
width = sunhdr->l_ras_width;
height = sunhdr->l_ras_height;
/* initialize */
cerr = 0;
image_ID = create_new_image (filename, width, height, GIMP_RGB,
&layer_ID, &drawable, &pixel_rgn);
tile_height = gimp_tile_height ();
data = g_malloc (tile_height * width * 3);
if (rle) rle_startread (ifp); /* Initialize RLE-buffer */
dest = data;
scan_lines = 0;
for (i = 0; i < height; i++)
{
if (rle)
{
for (j = 0; j < width; j++)
{
rle_getc (ifp); /* Skip unused byte */
*(dest++) = rle_getc (ifp);
*(dest++) = rle_getc (ifp);
*(dest++) = (cerr = (rle_getc (ifp)));
}
}
else
{
for (j = 0; j < width; j++)
{
getc (ifp); /* Skip unused byte */
*(dest++) = getc (ifp);
*(dest++) = getc (ifp);
*(dest++) = (cerr = (getc (ifp)));
}
}
err |= (cerr < 0);
if (sunhdr->l_ras_type != 3) /* BGR format ? Correct it */
{
for (j = 0; j < width; j++)
{
dest -= 3;
blue = *dest;
*dest = *(dest+2);
*(dest+2) = blue;
}
dest += width*3;
}
scan_lines++;
if ((i % 20) == 0)
gimp_progress_update ((double)(i+1) / (double)height);
if ((scan_lines == tile_height) || ((i+1) == height))
{
gimp_pixel_rgn_set_rect (&pixel_rgn, data, 0, i-scan_lines+1,
width, scan_lines);
scan_lines = 0;
dest = data;
}
}
g_free (data);
if (err)
g_message (_("EOF encountered on reading"));
gimp_drawable_flush (drawable);
return (image_ID);
}
static gint
save_index (FILE *ofp,
gint32 image_ID,
gint32 drawable_ID,
gint grey,
gint rle)
{
int height, width, linepad, i, j;
int ncols, bw, is_bw, is_wb, bpl;
int tile_height;
long tmp = 0;
guchar *cmap, *bwline = NULL;
guchar *data, *src;
L_SUNFILEHEADER sunhdr;
guchar sun_colormap[256*3];
static guchar sun_bwmap[6] = { 0,255,0,255,0,255 };
static guchar sun_wbmap[6] = { 255,0,255,0,255,0 };
unsigned char *suncolmap = sun_colormap;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
WRITE_FUN *write_fun;
drawable = gimp_drawable_get (drawable_ID);
drawable_type = gimp_drawable_type (drawable_ID);
width = drawable->width;
height = drawable->height;
tile_height = gimp_tile_height ();
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, width, height, FALSE, FALSE);
/* allocate a buffer for retrieving information from the pixel region */
src = data = (unsigned char *)g_malloc (tile_height * width * drawable->bpp);
/* Fill SUN-color map */
if (grey)
{
ncols = 256;
for (j = 0; j < ncols; j++)
{
suncolmap[j] = j;
suncolmap[j+ncols] = j;
suncolmap[j+ncols*2] = j;
}
}
else
{
cmap = gimp_image_get_cmap (image_ID, &ncols);
for (j = 0; j < ncols; j++)
{
suncolmap[j] = *(cmap++);
suncolmap[j+ncols] = *(cmap++);
suncolmap[j+ncols*2] = *(cmap++);
}
}
bw = (ncols == 2); /* Maybe this is a two-colour image */
if (bw)
{
bwline = g_malloc ((width+7)/8);
if (bwline == NULL) bw = 0;
}
is_bw = is_wb = 0;
if (bw) /* The Sun-OS imagetool generates index 0 for white and */
{ /* index 1 for black. Do the same without colourtable. */
is_bw = (memcmp (suncolmap, sun_bwmap, 6) == 0);
is_wb = (memcmp (suncolmap, sun_wbmap, 6) == 0);
}
/* Number of data bytes per line */
bpl = bw ? (width+7)/8 : width;
linepad = bpl % 2;
/* Fill in the SUN header */
sunhdr.l_ras_magic = RAS_MAGIC;
sunhdr.l_ras_width = width;
sunhdr.l_ras_height = height;
sunhdr.l_ras_depth = bw ? 1 : 8;
sunhdr.l_ras_length = (bpl+linepad) * height;
sunhdr.l_ras_type = (rle) ? RAS_TYPE_RLE : RAS_TYPE_STD;
if (is_bw || is_wb) /* No colourtable for real b/w images */
{
sunhdr.l_ras_maptype = 0; /* No colourmap */
sunhdr.l_ras_maplength = 0; /* Length of colourmap */
}
else
{
sunhdr.l_ras_maptype = 1; /* RGB colourmap */
sunhdr.l_ras_maplength = ncols*3; /* Length of colourmap */
}
write_sun_header (ofp, &sunhdr);
if (sunhdr.l_ras_maplength > 0)
write_sun_cols (ofp, &sunhdr, suncolmap);
#define GET_INDEX_TILE(begin) \
{int scan_lines; \
scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i); \
gimp_pixel_rgn_get_rect (&pixel_rgn, begin, 0, i, width, scan_lines); \
src = begin; }
if (rle) { write_fun = (WRITE_FUN *)&rle_fwrite; rle_startwrite (ofp); }
else write_fun = (WRITE_FUN *)&my_fwrite;
if (bw) /* Two colour image */
{
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0) GET_INDEX_TILE (data); /* Get more data */
byte2bit (src, width, bwline, is_bw);
(*write_fun) (bwline, bpl, 1, ofp);
if (linepad) (*write_fun) ((char *)&tmp, linepad, 1, ofp);
src += width;
if ((i % 20) == 0)
gimp_progress_update ((double) i / (double) height);
}
}
else /* Colour or grey-image */
{
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0) GET_INDEX_TILE (data); /* Get more data */
(*write_fun) ((char *)src, width, 1, ofp);
if (linepad) (*write_fun) ((char *)&tmp, linepad, 1, ofp);
src += width;
if ((i % 20) == 0)
gimp_progress_update ((double) i / (double) height);
}
}
if (rle)
rle_endwrite (ofp);
g_free (data);
if (bwline)
g_free (bwline);
gimp_drawable_detach (drawable);
if (ferror (ofp))
{
g_message (_("Write error occured"));
return (FALSE);
}
return (TRUE);
#undef GET_INDEX_TILE
}
static gint
save_rgb (FILE *ofp,
gint32 image_ID,
gint32 drawable_ID,
gint rle)
{
int height, width, tile_height, linepad;
int i, j, bpp;
guchar *data, *src;
L_SUNFILEHEADER sunhdr;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
drawable = gimp_drawable_get (drawable_ID);
drawable_type = gimp_drawable_type (drawable_ID);
width = drawable->width;
height = drawable->height;
tile_height = gimp_tile_height ();
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, width, height, FALSE, FALSE);
/* allocate a buffer for retrieving information from the pixel region */
src = data = (guchar *) g_malloc (tile_height * width * drawable->bpp);
/* #define SUNRAS_32 */
#ifdef SUNRAS_32
bpp = 4;
#else
bpp = 3;
#endif
linepad = (width * bpp) % 2;
/* Fill in the SUN header */
sunhdr.l_ras_magic = RAS_MAGIC;
sunhdr.l_ras_width = width;
sunhdr.l_ras_height = height;
sunhdr.l_ras_depth = 8 * bpp;
sunhdr.l_ras_length = (width*bpp + linepad)*height;
sunhdr.l_ras_type = (rle) ? RAS_TYPE_RLE : RAS_TYPE_STD;
sunhdr.l_ras_maptype = 0; /* No colourmap */
sunhdr.l_ras_maplength = 0; /* Length of colourmap */
write_sun_header (ofp, &sunhdr);
#define GET_RGB_TILE(begin) \
{int scan_lines; \
scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i); \
gimp_pixel_rgn_get_rect (&pixel_rgn, begin, 0, i, width, scan_lines); \
src = begin; }
if (!rle)
{
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0) GET_RGB_TILE (data); /* Get more data */
for (j = 0; j < width; j++)
{
if (bpp == 4) putc (0, ofp); /* Dummy */
putc (*(src+2), ofp); /* Blue */
putc (*(src+1), ofp); /* Green */
putc (*src, ofp); /* Red */
src += 3;
}
for (j = 0; j < linepad; j++)
putc (0, ofp);
if ((i % 20) == 0)
gimp_progress_update ((double) i / (double) height);
}
}
else /* Write runlength encoded */
{
rle_startwrite (ofp);
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0) GET_RGB_TILE (data); /* Get more data */
for (j = 0; j < width; j++)
{
if (bpp == 4) rle_putc (0, ofp); /* Dummy */
rle_putc (*(src+2), ofp); /* Blue */
rle_putc (*(src+1), ofp); /* Green */
rle_putc (*src, ofp); /* Red */
src += 3;
}
for (j = 0; j < linepad; j++)
rle_putc (0, ofp);
if ((i % 20) == 0)
gimp_progress_update ((double) i / (double) height);
}
rle_endwrite (ofp);
}
g_free (data);
gimp_drawable_detach (drawable);
if (ferror (ofp))
{
g_message (_("Write error occured"));
return (FALSE);
}
return (TRUE);
#undef GET_RGB_TILE
}
/* Save interface functions */
static gint
save_dialog (void)
{
GtkWidget *dlg;
GtkWidget *frame;
gboolean run;
dlg = gimp_dialog_new (_("Save as SUNRAS"), "sunras",
NULL, 0,
gimp_standard_help_func, "filters/sunras.html",
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
/* file save type */
frame = gimp_int_radio_group_new (TRUE, _("Data Formatting"),
G_CALLBACK (gimp_radio_button_update),
&psvals.rle, psvals.rle,
_("RunLength Encoded"), TRUE, NULL,
_("Standard"), FALSE, NULL,
NULL);
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
gtk_widget_show (dlg);
run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dlg);
return run;
}
static int
my_fwrite (void *ptr,
int size,
int nmemb,
FILE *stream)
{
return fwrite (ptr, size, nmemb, stream);
}
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