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gimp/plug-ins/common/xwd.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* XWD 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.
*
*/
/*
* XWD-input/output was written by Peter Kirchgessner (peter@kirchgessner.net)
* Examples from mainly used UNIX-systems have been used for testing.
* If a file does not work, please return a small (!!) compressed example.
* Currently the following formats are supported:
* pixmap_format | pixmap_depth | bits_per_pixel
* ---------------------------------------------
* 0 | 1 | 1
* 1 | 1,...,24 | 1
* 2 | 1 | 1
* 2 | 1,...,8 | 8
* 2 | 1,...,16 | 16
* 2 | 1,...,24 | 24
* 2 | 1,...,24 | 32
*/
/* Event history:
* PK = Peter Kirchgessner, ME = Mattias Engdegård
* V 1.00, PK, xx-Aug-96: First try
* V 1.01, PK, 03-Sep-96: Check for bitmap_bit_order
* V 1.90, PK, 17-Mar-97: Upgrade to work with GIMP V0.99
* Use visual class 3 to write indexed image
* Set gimp b/w-colormap if no xwdcolormap present
* V 1.91, PK, 05-Apr-97: Return all arguments, even in case of an error
* V 1.92, PK, 12-Oct-97: No progress bars for non-interactive mode
* V 1.93, PK, 11-Apr-98: Fix problem with overwriting memory
* V 1.94, ME, 27-Feb-00: Remove superfluous little-endian support (format is
specified as big-endian). Trim magic header
* V 1.95, PK, 02-Jul-01: Fix problem with 8 bit image
*/
static char ident[] = "@(#) GIMP XWD file-plugin v1.95 02-Jul-2001";
#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 gulong L_CARD32;
typedef gushort L_CARD16;
typedef guchar L_CARD8;
typedef struct
{
L_CARD32 l_header_size; /* Header size */
L_CARD32 l_file_version; /* File version (7) */
L_CARD32 l_pixmap_format; /* Image type */
L_CARD32 l_pixmap_depth; /* Number of planes */
L_CARD32 l_pixmap_width; /* Image width */
L_CARD32 l_pixmap_height; /* Image height */
L_CARD32 l_xoffset; /* x-offset (0 ?) */
L_CARD32 l_byte_order; /* Byte ordering */
L_CARD32 l_bitmap_unit;
L_CARD32 l_bitmap_bit_order; /* Bit order */
L_CARD32 l_bitmap_pad;
L_CARD32 l_bits_per_pixel; /* Number of bits per pixel */
L_CARD32 l_bytes_per_line; /* Number of bytes per scanline */
L_CARD32 l_visual_class; /* Visual class */
L_CARD32 l_red_mask; /* Red mask */
L_CARD32 l_green_mask; /* Green mask */
L_CARD32 l_blue_mask; /* Blue mask */
L_CARD32 l_bits_per_rgb; /* Number of bits per RGB-part */
L_CARD32 l_colormap_entries; /* Number of colours in colour table (?) */
L_CARD32 l_ncolors; /* Number of xwdcolor structures */
L_CARD32 l_window_width; /* Window width */
L_CARD32 l_window_height; /* Window height */
L_CARD32 l_window_x; /* Window position x */
L_CARD32 l_window_y; /* Window position y */
L_CARD32 l_window_bdrwidth;/* Window border width */
} L_XWDFILEHEADER;
typedef struct
{
L_CARD32 l_pixel; /* Colour index */
L_CARD16 l_red, l_green, l_blue; /* RGB-values */
L_CARD8 l_flags, l_pad;
} L_XWDCOLOR;
/* Some structures for mapping up to 32bit-pixel */
/* values which are kept in the XWD-Colormap */
#define MAPPERBITS 12
#define MAPPERMASK ((1 << MAPPERBITS)-1)
typedef struct
{
L_CARD32 pixel_val;
guchar red;
guchar green;
guchar blue;
} PMAP;
typedef struct
{
gint npixel; /* Number of pixel values in map */
guchar pixel_in_map[1 << MAPPERBITS];
PMAP pmap[256];
} PIXEL_MAP;
#define XWDHDR_PAD 0 /* Total number of padding bytes for XWD header */
#define XWDCOL_PAD 0 /* Total number of padding bytes for each XWD color */
/* 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 gint32 create_new_image (const gchar *filename,
guint width,
guint height,
GimpImageBaseType type,
gint32 *layer_ID,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn);
static int set_pixelmap (int, L_XWDCOLOR *,PIXEL_MAP *);
static int get_pixelmap (L_CARD32, PIXEL_MAP *,unsigned char *,
unsigned char *, unsigned char *);
static void set_bw_color_table (gint32);
static void set_color_table (gint32, L_XWDFILEHEADER *, L_XWDCOLOR *);
static gint32 load_xwd_f2_d1_b1 (const gchar *, FILE *, L_XWDFILEHEADER *,
L_XWDCOLOR *);
static gint32 load_xwd_f2_d8_b8 (const gchar *, FILE *, L_XWDFILEHEADER *,
L_XWDCOLOR *);
static gint32 load_xwd_f2_d16_b16 (const gchar *, FILE *, L_XWDFILEHEADER *,
L_XWDCOLOR *);
static gint32 load_xwd_f2_d24_b32 (const gchar *, FILE *, L_XWDFILEHEADER *,
L_XWDCOLOR *);
static gint32 load_xwd_f1_d24_b1 (const gchar *, FILE *, L_XWDFILEHEADER *,
L_XWDCOLOR *);
static L_CARD32 read_card32 (FILE *, int *);
static L_CARD16 read_card16 (FILE *, int *);
static L_CARD8 read_card8 (FILE *, int *);
static void write_card32 (FILE *, L_CARD32);
static void write_card16 (FILE *, L_CARD32);
static void write_card8 (FILE *, L_CARD32);
static void read_xwd_header (FILE *, L_XWDFILEHEADER *);
static void write_xwd_header (FILE *, L_XWDFILEHEADER *);
static void read_xwd_cols (FILE *, L_XWDFILEHEADER *, L_XWDCOLOR *);
static void write_xwd_cols (FILE *, L_XWDFILEHEADER *, L_XWDCOLOR *);
static gint save_index (FILE *, gint32, gint32, int);
static gint save_rgb (FILE *, gint32, gint32);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* 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_install_procedure ("file_xwd_load",
"load file of the XWD file format",
"load file of the XWD file format",
"Peter Kirchgessner",
"Peter Kirchgessner",
"1996",
"<Load>/XWD",
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_install_procedure ("file_xwd_save",
"saves files in the XWD file format",
"XWD saving handles all image types except \
those with alpha channels.",
"Peter Kirchgessner",
"Peter Kirchgessner",
"1996",
"<Save>/XWD",
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_magic_load_handler ("file_xwd_load",
"xwd",
"",
"4,long,0x00000007");
gimp_register_save_handler ("file_xwd_save",
"xwd",
"");
}
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_xwd_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_xwd_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 ("xwd", FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "XWD",
(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:
case GIMP_RUN_WITH_LAST_VALS:
/* No additional data to retrieve */
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 5)
status = GIMP_PDB_CALLING_ERROR;
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_CANCEL;
}
values[0].data.d_status = status;
}
static gint32
load_image (const gchar *filename)
{
FILE *ifp;
int depth, bpp;
gchar *temp;
gint32 image_ID;
L_XWDFILEHEADER xwdhdr;
L_XWDCOLOR *xwdcolmap = NULL;
ifp = fopen (filename, "rb");
if (!ifp)
{
g_message (_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return -1;
}
read_xwd_header (ifp, &xwdhdr);
if (xwdhdr.l_file_version != 7)
{
g_message (_("Could not read XWD header from '%s'"),
gimp_filename_to_utf8 (filename));
fclose (ifp);
return -1;
}
#ifdef XWD_COL_WAIT_DEBUG
{int k = 1;
while (k)
k = k;
}
#endif
/* Position to start of XWDColor structures */
fseek (ifp, (long)xwdhdr.l_header_size, SEEK_SET);
if (xwdhdr.l_colormap_entries > 0)
{
xwdcolmap = g_new (L_XWDCOLOR, xwdhdr.l_colormap_entries);
read_xwd_cols (ifp, &xwdhdr, xwdcolmap);
#ifdef XWD_COL_DEBUG
{
int j;
printf ("File %s\n",filename);
for (j=0; j < xwdhdr.l_colormap_entries; j++)
printf ("Entry 0x%08lx: 0x%04lx, 0x%04lx, 0x%04lx, %d\n",
(long)xwdcolmap[j].l_pixel,(long)xwdcolmap[j].l_red,
(long)xwdcolmap[j].l_green,(long)xwdcolmap[j].l_blue,
(int)xwdcolmap[j].l_flags);
}
#endif
if (xwdhdr.l_file_version != 7)
{
g_message (_("can't read color entries"));
g_free (xwdcolmap);
fclose (ifp);
return (-1);
}
}
temp = g_strdup_printf (_("Opening '%s'..."),
gimp_filename_to_utf8 (filename));
gimp_progress_init (temp);
g_free (temp);
depth = xwdhdr.l_pixmap_depth;
bpp = xwdhdr.l_bits_per_pixel;
image_ID = -1;
switch (xwdhdr.l_pixmap_format)
{
case 0: /* Single plane bitmap */
if ((depth == 1) && (bpp == 1))
{ /* Can be performed by format 2 loader */
image_ID = load_xwd_f2_d1_b1 (filename, ifp, &xwdhdr, xwdcolmap);
}
break;
case 1: /* Single plane pixmap */
if ((depth <= 24) && (bpp == 1))
{
image_ID = load_xwd_f1_d24_b1 (filename, ifp, &xwdhdr, xwdcolmap);
}
break;
case 2: /* Multiplane pixmaps */
if ((depth == 1) && (bpp == 1))
{
image_ID = load_xwd_f2_d1_b1 (filename, ifp, &xwdhdr, xwdcolmap);
}
else if ((depth <= 8) && (bpp == 8))
{
image_ID = load_xwd_f2_d8_b8 (filename, ifp, &xwdhdr, xwdcolmap);
}
else if ((depth <= 16) && (bpp == 16))
{
image_ID = load_xwd_f2_d16_b16 (filename, ifp, &xwdhdr, xwdcolmap);
}
else if ((depth <= 24) && ((bpp == 24) || (bpp == 32)))
{
image_ID = load_xwd_f2_d24_b32 (filename, ifp, &xwdhdr, xwdcolmap);
}
break;
}
fclose (ifp);
if (xwdcolmap != NULL) g_free ((char *)xwdcolmap);
if (image_ID == -1)
{
temp = g_strdup_printf (_("load_image (xwd): XWD-file %s has format %d, depth %d\n\
and bits per pixel %d.\nCurrently this is not supported.\n"),
gimp_filename_to_utf8 (filename),
(int) xwdhdr.l_pixmap_format, depth, bpp);
g_message (temp);
g_free (temp);
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 (_("Cannot save 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 (_("Cannot 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"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return FALSE;
}
temp = g_strdup_printf (_("Saving '%s'..."),
gimp_filename_to_utf8 (filename));
gimp_progress_init (temp);
g_free (temp);
if (drawable_type == GIMP_INDEXED_IMAGE)
retval = save_index (ofp, image_ID, drawable_ID, 0);
else if (drawable_type == GIMP_GRAY_IMAGE)
retval = save_index (ofp, image_ID, drawable_ID, 1);
else if (drawable_type == GIMP_RGB_IMAGE)
retval = save_rgb (ofp, image_ID, drawable_ID);
else
retval = FALSE;
fclose (ofp);
return retval;
}
static L_CARD32
read_card32 (FILE *ifp,
int *err)
{
L_CARD32 c;
c = (((L_CARD32)(getc (ifp))) << 24);
c |= (((L_CARD32)(getc (ifp))) << 16);
c |= (((L_CARD32)(getc (ifp))) << 8);
c |= ((L_CARD32)(*err = getc (ifp)));
*err = (*err < 0);
return (c);
}
static L_CARD16
read_card16 (FILE *ifp,
int *err)
{
L_CARD16 c;
c = (((L_CARD16)(getc (ifp))) << 8);
c |= ((L_CARD16)(*err = getc (ifp)));
*err = (*err < 0);
return (c);
}
static L_CARD8
read_card8 (FILE *ifp,
int *err)
{
L_CARD8 c;
c = ((L_CARD8)(*err = getc (ifp)));
*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);
}
static void
write_card16 (FILE *ofp,
L_CARD32 c)
{
putc ((int)((c >> 8) & 0xff), ofp);
putc ((int)((c) & 0xff), ofp);
}
static void
write_card8 (FILE *ofp,
L_CARD32 c)
{
putc ((int)((c) & 0xff), ofp);
}
static void
read_xwd_header (FILE *ifp,
L_XWDFILEHEADER *xwdhdr)
{
int j, err;
L_CARD32 *cp;
cp = (L_CARD32 *)xwdhdr;
/* Read in all 32-bit values of the header and check for byte order */
for (j = 0; j < sizeof (L_XWDFILEHEADER)/sizeof(xwdhdr->l_file_version); j++)
{
*(cp++) = read_card32 (ifp, &err);
if (err) break;
}
if (err) xwdhdr->l_file_version = 0; /* Not a valid XWD-file */
}
/* Write out an XWD-fileheader. The header size is calculated here */
static void
write_xwd_header (FILE *ofp,
L_XWDFILEHEADER *xwdhdr)
{
int j, hdrpad, hdr_entries;
L_CARD32 *cp;
hdrpad = XWDHDR_PAD;
hdr_entries = sizeof (L_XWDFILEHEADER)/sizeof(xwdhdr->l_file_version);
xwdhdr->l_header_size = hdr_entries * 4 + hdrpad;
cp = (L_CARD32 *)xwdhdr;
/* Write out all 32-bit values of the header and check for byte order */
for (j = 0; j < sizeof (L_XWDFILEHEADER)/sizeof(xwdhdr->l_file_version); j++)
{
write_card32 (ofp, *(cp++));
}
/* Add padding bytes after XWD header */
for (j = 0; j < hdrpad; j++)
write_card8 (ofp, (L_CARD32)0);
}
static void
read_xwd_cols (FILE *ifp,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *colormap)
{
int j, err = 0;
int flag_is_bad, index_is_bad;
int indexed = (xwdhdr->l_pixmap_depth <= 8);
long colmappos = ftell (ifp);
/* Read in XWD-Color structures (the usual case) */
flag_is_bad = index_is_bad = 0;
for (j = 0; j < xwdhdr->l_ncolors; j++)
{
colormap[j].l_pixel = read_card32 (ifp, &err);
colormap[j].l_red = read_card16 (ifp, &err);
colormap[j].l_green = read_card16 (ifp, &err);
colormap[j].l_blue = read_card16 (ifp, &err);
colormap[j].l_flags = read_card8 (ifp, &err);
colormap[j].l_pad = read_card8 (ifp, &err);
if (indexed && (colormap[j].l_pixel > 255))
index_is_bad++;
if (err) break;
}
if (err) /* Not a valid XWD-file ? */
xwdhdr->l_file_version = 0;
if (err || ((flag_is_bad == 0) && (index_is_bad == 0)))
return;
/* Read in XWD-Color structures (with 4 bytes inserted infront of RGB) */
fseek (ifp, colmappos, SEEK_SET);
flag_is_bad = index_is_bad = 0;
for (j = 0; j < xwdhdr->l_ncolors; j++)
{
colormap[j].l_pixel = read_card32 (ifp, &err);
read_card32 (ifp, &err); /* Empty bytes on Alpha OSF */
colormap[j].l_red = read_card16 (ifp, &err);
colormap[j].l_green = read_card16 (ifp, &err);
colormap[j].l_blue = read_card16 (ifp, &err);
colormap[j].l_flags = read_card8 (ifp, &err);
colormap[j].l_pad = read_card8 (ifp, &err);
if (indexed && (colormap[j].l_pixel > 255))
index_is_bad++;
if (err) break;
}
if (err) /* Not a valid XWD-file ? */
xwdhdr->l_file_version = 0;
if (err || ((flag_is_bad == 0) && (index_is_bad == 0)))
return;
/* Read in XWD-Color structures (with 2 bytes inserted infront of RGB) */
fseek (ifp, colmappos, SEEK_SET);
flag_is_bad = index_is_bad = 0;
for (j = 0; j < xwdhdr->l_ncolors; j++)
{
colormap[j].l_pixel = read_card32 (ifp, &err);
read_card16 (ifp, &err); /* Empty bytes (from where ?) */
colormap[j].l_red = read_card16 (ifp, &err);
colormap[j].l_green = read_card16 (ifp, &err);
colormap[j].l_blue = read_card16 (ifp, &err);
colormap[j].l_flags = read_card8 (ifp, &err);
colormap[j].l_pad = read_card8 (ifp, &err);
/* if ((colormap[j].l_flags == 0) || (colormap[j].l_flags > 7))
flag_is_bad++; */
if (indexed && (colormap[j].l_pixel > 255))
index_is_bad++;
if (err) break;
}
if (err) /* Not a valid XWD-file ? */
xwdhdr->l_file_version = 0;
if (err || ((flag_is_bad == 0) && (index_is_bad == 0)))
return;
/* Read in XWD-Color structures (every value is 8 bytes from a CRAY) */
fseek (ifp, colmappos, SEEK_SET);
flag_is_bad = index_is_bad = 0;
for (j = 0; j < xwdhdr->l_ncolors; j++)
{
read_card32 (ifp, &err);
colormap[j].l_pixel = read_card32 (ifp, &err);
read_card32 (ifp, &err);
colormap[j].l_red = read_card32 (ifp, &err);
read_card32 (ifp, &err);
colormap[j].l_green = read_card32 (ifp, &err);
read_card32 (ifp, &err);
colormap[j].l_blue = read_card32 (ifp, &err);
/* The flag byte is kept in the first byte */
colormap[j].l_flags = read_card8 (ifp, &err);
colormap[j].l_pad = read_card8 (ifp, &err);
read_card16 (ifp, &err);
read_card32 (ifp, &err);
if (indexed && (colormap[j].l_pixel > 255))
index_is_bad++;
if (err) break;
}
if (flag_is_bad || index_is_bad)
{
printf ("xwd: Warning. Error in XWD-color-structure (");
if (flag_is_bad) printf ("flag");
if (index_is_bad) printf ("index");
printf (")\n");
}
if (err) xwdhdr->l_file_version = 0; /* Not a valid XWD-file */
}
static void
write_xwd_cols (FILE *ofp,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *colormap)
{
int j;
for (j = 0; j < xwdhdr->l_colormap_entries; j++)
{
#ifdef CRAY
write_card32 (ofp, (L_CARD32)0);
write_card32 (ofp, colormap[j].l_pixel);
write_card32 (ofp, (L_CARD32)0);
write_card32 (ofp, (L_CARD32)colormap[j].l_red);
write_card32 (ofp, (L_CARD32)0);
write_card32 (ofp, (L_CARD32)colormap[j].l_green);
write_card32 (ofp, (L_CARD32)0);
write_card32 (ofp, (L_CARD32)colormap[j].l_blue);
write_card8 (ofp, (L_CARD32)colormap[j].l_flags);
write_card8 (ofp, (L_CARD32)colormap[j].l_pad);
write_card16 (ofp, (L_CARD32)0);
write_card32 (ofp, (L_CARD32)0);
#else
#ifdef __alpha
write_card32 (ofp, colormap[j].l_pixel);
write_card32 (ofp, (L_CARD32)0);
write_card16 (ofp, (L_CARD32)colormap[j].l_red);
write_card16 (ofp, (L_CARD32)colormap[j].l_green);
write_card16 (ofp, (L_CARD32)colormap[j].l_blue);
write_card8 (ofp, (L_CARD32)colormap[j].l_flags);
write_card8 (ofp, (L_CARD32)colormap[j].l_pad);
#else
write_card32 (ofp, colormap[j].l_pixel);
write_card16 (ofp, (L_CARD32)colormap[j].l_red);
write_card16 (ofp, (L_CARD32)colormap[j].l_green);
write_card16 (ofp, (L_CARD32)colormap[j].l_blue);
write_card8 (ofp, (L_CARD32)colormap[j].l_flags);
write_card8 (ofp, (L_CARD32)colormap[j].l_pad);
#endif
#endif
}
}
/* Create a map for mapping up to 32 bit pixelvalues to RGB. */
/* Returns number of colors kept in the map (up to 256) */
static int set_pixelmap (int ncols,
L_XWDCOLOR *xwdcol,
PIXEL_MAP *pixelmap)
{
int i, j, k, maxcols;
L_CARD32 pixel_val;
memset ((char *)pixelmap,0,sizeof (PIXEL_MAP));
maxcols = 0;
for (j = 0; j < ncols; j++) /* For each entry of the XWD colormap */
{
pixel_val = xwdcol[j].l_pixel;
for (k = 0; k < maxcols; k++) /* Where to insert in list ? */
{
if (pixel_val <= pixelmap->pmap[k].pixel_val)
break;
}
if ((k < maxcols) && (pixel_val == pixelmap->pmap[k].pixel_val))
break; /* It was already in list */
if (k >= 256) break;
if (k < maxcols) /* Must move entries to the back ? */
{
for (i = maxcols-1; i >= k; i--)
memcpy ((char *)&(pixelmap->pmap[i+1]),(char *)&(pixelmap->pmap[i]),
sizeof (PMAP));
}
pixelmap->pmap[k].pixel_val = pixel_val;
pixelmap->pmap[k].red = xwdcol[j].l_red >> 8;
pixelmap->pmap[k].green = xwdcol[j].l_green >> 8;
pixelmap->pmap[k].blue = xwdcol[j].l_blue >> 8;
pixelmap->pixel_in_map[pixel_val & MAPPERMASK] = 1;
maxcols++;
}
pixelmap->npixel = maxcols;
#ifdef XWD_COL_DEBUG
printf ("Colours in pixelmap: %d\n",pixelmap->npixel);
for (j=0; j<pixelmap->npixel; j++)
printf ("Pixelvalue 0x%08lx, 0x%02x 0x%02x 0x%02x\n",
pixelmap->pmap[j].pixel_val,
pixelmap->pmap[j].red,pixelmap->pmap[j].green,
pixelmap->pmap[j].blue);
for (j=0; j<=MAPPERMASK; j++)
printf ("0x%08lx: %d\n",(long)j,pixelmap->pixel_in_map[j]);
#endif
return (pixelmap->npixel);
}
/* Search a pixel value in the pixel map. Returns 0 if the */
/* pixelval was not found in map. Returns 1 if found. */
static int
get_pixelmap (L_CARD32 pixelval,
PIXEL_MAP *pixelmap,
unsigned char *red,
unsigned char *green,
unsigned char *blue)
{
register PMAP *low, *high, *middle;
if (pixelmap->npixel == 0) return (0);
if (!(pixelmap->pixel_in_map[pixelval & MAPPERMASK])) return (0);
low = &(pixelmap->pmap[0]);
high = &(pixelmap->pmap[pixelmap->npixel-1]);
/* Do a binary search on the array */
while (low < high)
{
middle = low + ((high - low)/2);
if (pixelval <= middle->pixel_val)
high = middle;
else
low = middle+1;
}
if (pixelval == low->pixel_val)
{
*red = low->red; *green = low->green; *blue = low->blue;
return (1);
}
return (0);
}
static void
set_bw_color_table (gint32 image_ID)
{
static unsigned char BWColorMap[2*3] = { 255, 255, 255, 0, 0, 0 };
#ifdef XWD_COL_DEBUG
printf ("Set GIMP b/w-colortable:\n");
#endif
gimp_image_set_cmap (image_ID, BWColorMap, 2);
}
/* Initialize an 8-bit colortable from the mask-values of the XWD-header */
static void
init_color_table256 (L_XWDFILEHEADER *xwdhdr, unsigned char *ColorMap)
{
int i, j, k, cuind;
int redshift, greenshift, blueshift;
int maxred, maxgreen, maxblue;
/* Assume: the bit masks for red/green/blue are grouped together
* Example: redmask = 0xe0, greenmask = 0x1c, bluemask = 0x03
* We need to know where to place the RGB-values (shifting)
* and the maximum value for each component.
*/
redshift = greenshift = blueshift = 0;
if ((maxred = xwdhdr->l_red_mask) == 0) return;
/* Shift the redmask to the rightmost bit position to get
* maximum value for red.
*/
while ((maxred & 1) == 0)
{
redshift++;
maxred >>= 1;
}
if ((maxgreen = xwdhdr->l_green_mask) == 0) return;
while ((maxgreen & 1) == 0)
{
greenshift++;
maxgreen >>= 1;
}
if ((maxblue = xwdhdr->l_blue_mask) == 0) return;
while ((maxblue & 1) == 0)
{
blueshift++;
maxblue >>= 1;
}
memset ((char *)ColorMap,0,256*3);
for (i = 0; i <= maxred; i++)
for (j = 0; j <= maxgreen; j++)
for (k = 0; k <= maxblue; k++)
{
cuind = (i << redshift) | (j << greenshift) | (k << blueshift);
if (cuind < 256)
{
ColorMap[cuind*3] = (i * 255)/maxred;
ColorMap[cuind*3+1] = (j * 255)/maxgreen;
ColorMap[cuind*3+2] = (k * 255)/maxblue;
}
}
}
static void
set_color_table (gint32 image_ID,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *xwdcolmap)
{
int ncols, i, j;
unsigned char ColorMap[256*3];
ncols = xwdhdr->l_colormap_entries;
if (xwdhdr->l_ncolors < ncols)
ncols = xwdhdr->l_ncolors;
if (ncols <= 0)
return;
if (ncols > 256)
ncols = 256;
/* Initialize color table for all 256 entries from mask-values */
init_color_table256 (xwdhdr, ColorMap);
for (j = 0; j < ncols; j++)
{
i = xwdcolmap[j].l_pixel;
if ((i >= 0) && (i < 256))
{
ColorMap[i*3] = (xwdcolmap[j].l_red) >> 8;
ColorMap[i*3+1] = (xwdcolmap[j].l_green) >> 8;
ColorMap[i*3+2] = (xwdcolmap[j].l_blue) >> 8;
}
}
#ifdef XWD_COL_DEBUG
printf ("Set GIMP colortable:\n");
for (j = 0; j < 256; 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, 256);
}
/* 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_GRAY:
gdtype = GIMP_GRAY_IMAGE;
break;
case GIMP_INDEXED:
gdtype = GIMP_INDEXED_IMAGE;
break;
case GIMP_RGB:
gdtype = GIMP_RGB_IMAGE;
break;
default:
g_warning ("Unknown 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 XWD with pixmap_format 2, pixmap_depth 1, bits_per_pixel 1 */
static gint32
load_xwd_f2_d1_b1 (const gchar *filename,
FILE *ifp,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *xwdcolmap)
{
register int pix8;
register unsigned char *dest, *src;
unsigned char c1, c2, c3, c4;
int width, height, linepad, scan_lines, tile_height;
int i, j, ncols;
char *temp = ident; /* Just to satisfy lint/gcc */
unsigned char bit2byte[256*8];
unsigned char *data, *scanline;
int err = 0;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
#ifdef XWD_DEBUG
printf ("load_xwd_f2_d1_b1 (%s)\n", filename);
#endif
width = xwdhdr->l_pixmap_width;
height = xwdhdr->l_pixmap_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);
scanline = (unsigned char *)g_malloc (xwdhdr->l_bytes_per_line+8);
if (scanline == NULL) return (-1);
ncols = xwdhdr->l_colormap_entries;
if (xwdhdr->l_ncolors < ncols) ncols = xwdhdr->l_ncolors;
if (ncols < 2)
set_bw_color_table (image_ID);
else
set_color_table (image_ID, xwdhdr, xwdcolmap);
temp = (char *)bit2byte;
/* Get an array for mapping 8 bits in a byte to 8 bytes */
if (!xwdhdr->l_bitmap_bit_order)
{
for (j = 0; j < 256; j++)
for (i = 0; i < 8; i++)
*(temp++) = ((j & (1 << i)) != 0);
}
else
{
for (j = 0; j < 256; j++)
for (i = 7; i >= 0; i--)
*(temp++) = ((j & (1 << i)) != 0);
}
linepad = xwdhdr->l_bytes_per_line - (xwdhdr->l_pixmap_width+7)/8;
if (linepad < 0) linepad = 0;
dest = data;
scan_lines = 0;
for (i = 0; i < height; i++)
{
if (fread (scanline, xwdhdr->l_bytes_per_line, 1, ifp) != 1)
{
err = 1;
break;
}
/* Need to check byte order ? */
if (xwdhdr->l_bitmap_bit_order != xwdhdr->l_byte_order)
{
src = scanline;
switch (xwdhdr->l_bitmap_unit)
{
case 16:
j = xwdhdr->l_bytes_per_line;
while (j > 0)
{
c1 = src[0]; c2 = src[1];
*(src++) = c2; *(src++) = c1;
j -= 2;
}
break;
case 32:
j = xwdhdr->l_bytes_per_line;
while (j > 0)
{
c1 = src[0]; c2 = src[1]; c3 = src[2]; c4 = src[3];
*(src++) = c4; *(src++) = c3; *(src++) = c2; *(src++) = c1;
j -= 4;
}
break;
}
}
src = scanline;
j = width;
while (j >= 8)
{
pix8 = *(src++);
memcpy (dest, bit2byte + pix8*8, 8);
dest += 8;
j -= 8;
}
if (j > 0)
{
pix8 = *(src++);
memcpy (dest, bit2byte + pix8*8, j);
dest += j;
}
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;
}
if (err) break;
}
g_free (data);
g_free (scanline);
if (err)
g_message (_("EOF encountered on "));
gimp_drawable_flush (drawable);
return (err ? -1 : image_ID);
}
/* Load XWD with pixmap_format 2, pixmap_depth 8, bits_per_pixel 8 */
static gint32
load_xwd_f2_d8_b8 (const gchar *filename,
FILE *ifp,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *xwdcolmap)
{
int width, height, linepad, tile_height, scan_lines;
int i, j, ncols;
int greyscale;
unsigned char *dest, *data;
int err = 0;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
#ifdef XWD_DEBUG
printf ("load_xwd_f2_d8_b8 (%s)\n", filename);
#endif
width = xwdhdr->l_pixmap_width;
height = xwdhdr->l_pixmap_height;
/* This could also be a greyscale image. Check it */
greyscale = 0;
if ((xwdhdr->l_ncolors == 256) && (xwdhdr->l_colormap_entries == 256))
{
for (j = 0; j < 256; j++)
{
if ( (xwdcolmap[j].l_pixel != j)
|| ((xwdcolmap[j].l_red >> 8) != j)
|| ((xwdcolmap[j].l_green >> 8) != j)
|| ((xwdcolmap[j].l_blue >> 8) != j))
break;
}
greyscale = (j == 256);
}
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)
{
ncols = xwdhdr->l_colormap_entries;
if (xwdhdr->l_ncolors < ncols) ncols = xwdhdr->l_ncolors;
if (ncols < 2)
set_bw_color_table (image_ID);
else
set_color_table (image_ID, xwdhdr, xwdcolmap);
}
linepad = xwdhdr->l_bytes_per_line - xwdhdr->l_pixmap_width;
if (linepad < 0) linepad = 0;
dest = data;
scan_lines = 0;
for (i = 0; i < height; i++)
{
if (fread (dest, 1, width, ifp) != width)
{
err = 1;
break;
}
dest += width;
for (j = 0; j < linepad; j++)
getc (ifp);
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 (err ? -1 : image_ID);
}
/* Load XWD with pixmap_format 2, pixmap_depth up to 16, bits_per_pixel 16 */
static gint32
load_xwd_f2_d16_b16 (const gchar *filename,
FILE *ifp,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *xwdcolmap)
{
register unsigned char *dest, lsbyte_first;
int width, height, linepad, i, j, c0, c1, ncols;
int red, green, blue, redval, greenval, blueval;
int maxred, maxgreen, maxblue;
int tile_height, scan_lines;
unsigned long redmask, greenmask, bluemask;
unsigned int redshift, greenshift, blueshift;
unsigned long maxval;
unsigned char *ColorMap, *cm, *data;
int err = 0;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
#ifdef XWD_DEBUG
printf ("load_xwd_f2_d16_b16 (%s)\n", filename);
#endif
width = xwdhdr->l_pixmap_width;
height = xwdhdr->l_pixmap_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);
/* Get memory for mapping 16 bit XWD-pixel to GIMP-RGB */
maxval = 0x10000 * 3;
ColorMap = (unsigned char *)g_malloc (maxval);
if (ColorMap == NULL)
{
g_message (_("No memory for mapping colors"));
return (-1);
}
memset (ColorMap,0,maxval);
redmask = xwdhdr->l_red_mask;
greenmask = xwdhdr->l_green_mask;
bluemask = xwdhdr->l_blue_mask;
/* How to shift RGB to be right aligned ? */
/* (We rely on the the mask bits are grouped and not mixed) */
redshift = greenshift = blueshift = 0;
while (((1 << redshift) & redmask) == 0) redshift++;
while (((1 << greenshift) & greenmask) == 0) greenshift++;
while (((1 << blueshift) & bluemask) == 0) blueshift++;
/* The bits_per_rgb may not be correct. Use redmask instead */
maxred = 0; while (redmask >> (redshift + maxred)) maxred++;
maxred = (1 << maxred) - 1;
maxgreen = 0; while (greenmask >> (greenshift + maxgreen)) maxgreen++;
maxgreen = (1 << maxgreen) - 1;
maxblue = 0; while (bluemask >> (blueshift + maxblue)) maxblue++;
maxblue = (1 << maxblue) - 1;
/* Built up the array to map XWD-pixel value to GIMP-RGB */
for (red = 0; red <= maxred; red++)
{
redval = (red * 255) / maxred;
for (green = 0; green <= maxgreen; green++)
{
greenval = (green * 255) / maxgreen;
for (blue = 0; blue <= maxblue; blue++)
{
blueval = (blue * 255) / maxblue;
cm = ColorMap + ((red << redshift) + (green << greenshift)
+ (blue << blueshift)) * 3;
*(cm++) = redval;
*(cm++) = greenval;
*cm = blueval;
}
}
}
/* Now look what was written to the XWD-Colormap */
ncols = xwdhdr->l_colormap_entries;
if (xwdhdr->l_ncolors < ncols) ncols = xwdhdr->l_ncolors;
for (j = 0; j < ncols; j++)
{
cm = ColorMap + xwdcolmap[j].l_pixel * 3;
*(cm++) = (xwdcolmap[j].l_red >> 8);
*(cm++) = (xwdcolmap[j].l_green >> 8);
*cm = (xwdcolmap[j].l_blue >> 8);
}
/* What do we have to consume after a line has finished ? */
linepad = xwdhdr->l_bytes_per_line
- (xwdhdr->l_pixmap_width*xwdhdr->l_bits_per_pixel)/8;
if (linepad < 0) linepad = 0;
lsbyte_first = (xwdhdr->l_byte_order == 0);
dest = data;
scan_lines = 0;
for (i = 0; i < height; i++)
{
for (j = 0; j < width; j++)
{
c0 = getc (ifp);
c1 = getc (ifp);
if (c1 < 0)
{
err = 1;
break;
}
if (lsbyte_first)
c0 = c0 | (c1 << 8);
else
c0 = (c0 << 8) | c1;
cm = ColorMap + c0 * 3;
*(dest++) = *(cm++);
*(dest++) = *(cm++);
*(dest++) = *cm;
}
if (err) break;
for (j = 0; j < linepad; j++)
getc (ifp);
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);
g_free (ColorMap);
if (err)
g_message (_("EOF encountered on reading"));
gimp_drawable_flush (drawable);
return (err ? -1 : image_ID);
}
/* Load XWD with pixmap_format 2, pixmap_depth up to 24, bits_per_pixel 24/32 */
static gint32
load_xwd_f2_d24_b32 (const gchar *filename,
FILE *ifp,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *xwdcolmap)
{
register unsigned char *dest, lsbyte_first;
int width, height, linepad, i, j, c0, c1, c2, c3;
int tile_height, scan_lines;
L_CARD32 pixelval;
int red, green, blue, ncols;
int maxred, maxgreen, maxblue;
unsigned long redmask, greenmask, bluemask;
unsigned int redshift, greenshift, blueshift;
unsigned char redmap[256],greenmap[256],bluemap[256];
unsigned char *data;
PIXEL_MAP pixel_map;
int err = 0;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
#ifdef XWD_DEBUG
printf ("load_xwd_f2_d24_b32 (%s)\n", filename);
#endif
width = xwdhdr->l_pixmap_width;
height = xwdhdr->l_pixmap_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);
redmask = xwdhdr->l_red_mask;
greenmask = xwdhdr->l_green_mask;
bluemask = xwdhdr->l_blue_mask;
if (redmask == 0) redmask = 0xff0000;
if (greenmask == 0) greenmask = 0x00ff00;
if (bluemask == 0) bluemask = 0x0000ff;
/* How to shift RGB to be right aligned ? */
/* (We rely on the the mask bits are grouped and not mixed) */
redshift = greenshift = blueshift = 0;
while (((1 << redshift) & redmask) == 0) redshift++;
while (((1 << greenshift) & greenmask) == 0) greenshift++;
while (((1 << blueshift) & bluemask) == 0) blueshift++;
/* The bits_per_rgb may not be correct. Use redmask instead */
maxred = 0; while (redmask >> (redshift + maxred)) maxred++;
maxred = (1 << maxred) - 1;
maxgreen = 0; while (greenmask >> (greenshift + maxgreen)) maxgreen++;
maxgreen = (1 << maxgreen) - 1;
maxblue = 0; while (bluemask >> (blueshift + maxblue)) maxblue++;
maxblue = (1 << maxblue) - 1;
/* Set map-arrays for red, green, blue */
for (red = 0; red <= maxred; red++)
redmap[red] = (red * 255) / maxred;
for (green = 0; green <= maxgreen; green++)
greenmap[green] = (green * 255) / maxgreen;
for (blue = 0; blue <= maxblue; blue++)
bluemap[blue] = (blue * 255) / maxblue;
ncols = xwdhdr->l_colormap_entries;
if (xwdhdr->l_ncolors < ncols) ncols = xwdhdr->l_ncolors;
ncols = set_pixelmap (ncols, xwdcolmap, &pixel_map);
/* What do we have to consume after a line has finished ? */
linepad = xwdhdr->l_bytes_per_line
- (xwdhdr->l_pixmap_width*xwdhdr->l_bits_per_pixel)/8;
if (linepad < 0) linepad = 0;
lsbyte_first = (xwdhdr->l_byte_order == 0);
dest = data;
scan_lines = 0;
if (xwdhdr->l_bits_per_pixel == 32)
{
for (i = 0; i < height; i++)
{
for (j = 0; j < width; j++)
{
c0 = getc (ifp);
c1 = getc (ifp);
c2 = getc (ifp);
c3 = getc (ifp);
if (c3 < 0)
{
err = 1;
break;
}
if (lsbyte_first)
pixelval = c0 | (c1 << 8) | (c2 << 16) | (c3 << 24);
else
pixelval = (c0 << 24) | (c1 << 16) | (c2 << 8) | c3;
if (get_pixelmap (pixelval, &pixel_map, dest, dest+1, dest+2))
{
dest += 3;
}
else
{
*(dest++) = redmap[(pixelval & redmask) >> redshift];
*(dest++) = greenmap[(pixelval & greenmask) >> greenshift];
*(dest++) = bluemap[(pixelval & bluemask) >> blueshift];
}
}
scan_lines++;
if (err) break;
for (j = 0; j < linepad; j++)
getc (ifp);
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;
}
}
}
else /* 24 bits per pixel */
{
for (i = 0; i < height; i++)
{
for (j = 0; j < width; j++)
{
c0 = getc (ifp);
c1 = getc (ifp);
c2 = getc (ifp);
if (c2 < 0)
{
err = 1;
break;
}
if (lsbyte_first)
pixelval = c0 | (c1 << 8) | (c2 << 16);
else
pixelval = (c0 << 16) | (c1 << 8) | c2;
if (get_pixelmap (pixelval, &pixel_map, dest, dest+1, dest+2))
{
dest += 3;
}
else
{
*(dest++) = redmap[(pixelval & redmask) >> redshift];
*(dest++) = greenmap[(pixelval & greenmask) >> greenshift];
*(dest++) = bluemap[(pixelval & bluemask) >> blueshift];
}
}
scan_lines++;
if (err) break;
for (j = 0; j < linepad; j++)
getc (ifp);
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 (err ? -1 : image_ID);
}
/* Load XWD with pixmap_format 1, pixmap_depth up to 24, bits_per_pixel 1 */
static gint32
load_xwd_f1_d24_b1 (const gchar *filename,
FILE *ifp,
L_XWDFILEHEADER *xwdhdr,
L_XWDCOLOR *xwdcolmap)
{
register unsigned char *dest, outmask, inmask, do_reverse;
int width, height, linepad, i, j, plane, fromright;
int tile_height, tile_start, tile_end;
int indexed, bytes_per_pixel;
int maxred, maxgreen, maxblue;
int red, green, blue, ncols, standard_rgb;
long data_offset, plane_offset, tile_offset;
unsigned long redmask, greenmask, bluemask;
unsigned int redshift, greenshift, blueshift;
unsigned long g;
unsigned char redmap[256], greenmap[256], bluemap[256];
unsigned char bit_reverse[256];
unsigned char *xwddata, *xwdin, *data;
L_CARD32 pixelval;
PIXEL_MAP pixel_map;
int err = 0;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
#ifdef XWD_DEBUG
printf ("load_xwd_f1_d24_b1 (%s)\n", filename);
#endif
xwddata = g_malloc (xwdhdr->l_bytes_per_line);
if (xwddata == NULL) return (-1);
width = xwdhdr->l_pixmap_width;
height = xwdhdr->l_pixmap_height;
indexed = (xwdhdr->l_pixmap_depth <= 8);
bytes_per_pixel = (indexed ? 1 : 3);
image_ID = create_new_image (filename, width, height, indexed ? GIMP_INDEXED : GIMP_RGB,
&layer_ID, &drawable, &pixel_rgn);
tile_height = gimp_tile_height ();
data = g_malloc (tile_height * width * bytes_per_pixel);
linepad = xwdhdr->l_bytes_per_line
- (xwdhdr->l_pixmap_width+7)/8;
if (linepad < 0) linepad = 0;
for (j = 0; j < 256; j++) /* Create an array for reversing bits */
{
inmask = 0;
for (i = 0; i < 8; i++)
{
inmask <<= 1;
if (j & (1 << i)) inmask |= 1;
}
bit_reverse[j] = inmask;
}
redmask = xwdhdr->l_red_mask;
greenmask = xwdhdr->l_green_mask;
bluemask = xwdhdr->l_blue_mask;
if (redmask == 0) redmask = 0xff0000;
if (greenmask == 0) greenmask = 0x00ff00;
if (bluemask == 0) bluemask = 0x0000ff;
standard_rgb = (redmask == 0xff0000) && (greenmask == 0x00ff00)
&& (bluemask == 0x0000ff);
redshift = greenshift = blueshift = 0;
if (!standard_rgb) /* Do we need to re-map the pixel-values ? */
{
/* How to shift RGB to be right aligned ? */
/* (We rely on the the mask bits are grouped and not mixed) */
while (((1 << redshift) & redmask) == 0) redshift++;
while (((1 << greenshift) & greenmask) == 0) greenshift++;
while (((1 << blueshift) & bluemask) == 0) blueshift++;
/* The bits_per_rgb may not be correct. Use redmask instead */
maxred = 0; while (redmask >> (redshift + maxred)) maxred++;
maxred = (1 << maxred) - 1;
maxgreen = 0; while (greenmask >> (greenshift + maxgreen)) maxgreen++;
maxgreen = (1 << maxgreen) - 1;
maxblue = 0; while (bluemask >> (blueshift + maxblue)) maxblue++;
maxblue = (1 << maxblue) - 1;
/* Set map-arrays for red, green, blue */
for (red = 0; red <= maxred; red++)
redmap[red] = (red * 255) / maxred;
for (green = 0; green <= maxgreen; green++)
greenmap[green] = (green * 255) / maxgreen;
for (blue = 0; blue <= maxblue; blue++)
bluemap[blue] = (blue * 255) / maxblue;
}
ncols = xwdhdr->l_colormap_entries;
if (xwdhdr->l_ncolors < ncols) ncols = xwdhdr->l_ncolors;
if (indexed)
{
if (ncols < 2)
set_bw_color_table (image_ID);
else
set_color_table (image_ID, xwdhdr, xwdcolmap);
}
else
{
ncols = set_pixelmap (ncols, xwdcolmap, &pixel_map);
}
do_reverse = !xwdhdr->l_bitmap_bit_order;
/* This is where the image data starts within the file */
data_offset = ftell (ifp);
for (tile_start = 0; tile_start < height; tile_start += tile_height)
{
memset (data, 0, width*tile_height*bytes_per_pixel);
tile_end = tile_start + tile_height - 1;
if (tile_end >= height) tile_end = height - 1;
for (plane = 0; plane < xwdhdr->l_pixmap_depth; plane++)
{
dest = data; /* Position to start of tile within the plane */
plane_offset = data_offset + plane*height*xwdhdr->l_bytes_per_line;
tile_offset = plane_offset + tile_start*xwdhdr->l_bytes_per_line;
fseek (ifp, tile_offset, SEEK_SET);
/* Place the last plane at the least significant bit */
if (indexed) /* Only 1 byte per pixel */
{
fromright = xwdhdr->l_pixmap_depth-1-plane;
outmask = (1 << fromright);
}
else /* 3 bytes per pixel */
{
fromright = xwdhdr->l_pixmap_depth-1-plane;
dest += 2 - fromright/8;
outmask = (1 << (fromright % 8));
}
for (i = tile_start; i <= tile_end; i++)
{
if (fread (xwddata,xwdhdr->l_bytes_per_line,1,ifp) != 1)
{
err = 1;
break;
}
xwdin = xwddata;
/* Handle bitmap unit */
if (xwdhdr->l_bitmap_unit == 16)
{
if (xwdhdr->l_bitmap_bit_order != xwdhdr->l_byte_order)
{
j = xwdhdr->l_bytes_per_line/2;
while (j--)
{
inmask = xwdin[0]; xwdin[0] = xwdin[1]; xwdin[1] = inmask;
xwdin += 2;
}
xwdin = xwddata;
}
}
else if (xwdhdr->l_bitmap_unit == 32)
{
if (xwdhdr->l_bitmap_bit_order != xwdhdr->l_byte_order)
{
j = xwdhdr->l_bytes_per_line/4;
while (j--)
{
inmask = xwdin[0]; xwdin[0] = xwdin[3]; xwdin[3] = inmask;
inmask = xwdin[1]; xwdin[1] = xwdin[2]; xwdin[2] = inmask;
xwdin += 4;
}
xwdin = xwddata;
}
}
g = inmask = 0;
for (j = 0; j < width; j++)
{
if (!inmask)
{
g = *(xwdin++);
if (do_reverse)
g = bit_reverse[g];
inmask = 0x80;
}
if (g & inmask)
*dest |= outmask;
dest += bytes_per_pixel;
inmask >>= 1;
}
}
}
/* For indexed images, the mapping to colors is done by the color table. */
/* Otherwise we must do the mapping by ourself. */
if (!indexed)
{
dest = data;
for (i = tile_start; i <= tile_end; i++)
{
for (j = 0; j < width; j++)
{
pixelval = (*dest << 16) | (*(dest+1) << 8) | *(dest+2);
if ( get_pixelmap (pixelval, &pixel_map, dest, dest+1, dest+2)
|| standard_rgb)
{
dest += 3;
}
else /* We have to map RGB to 0,...,255 */
{
*(dest++) = redmap[(pixelval & redmask) >> redshift];
*(dest++) = greenmap[(pixelval & greenmask) >> greenshift];
*(dest++) = bluemap[(pixelval & bluemask) >> blueshift];
}
}
}
}
gimp_progress_update ((double)(tile_end) / (double)(height));
gimp_pixel_rgn_set_rect (&pixel_rgn, data, 0, tile_start,
width, tile_end-tile_start+1);
}
g_free (data);
g_free (xwddata);
if (err)
g_message (_("EOF encountered on reading"));
gimp_drawable_flush (drawable);
return (err ? -1 : image_ID);
}
static gint
save_index (FILE *ofp,
gint32 image_ID,
gint32 drawable_ID,
int grey)
{
int height, width, linepad, tile_height, i, j;
int ncolors, vclass;
long tmp = 0;
unsigned char *data, *src, *cmap;
L_XWDFILEHEADER xwdhdr;
L_XWDCOLOR xwdcolmap[256];
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
#ifdef XWD_DEBUG
printf ("save_index ()\n");
#endif
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);
linepad = width % 4;
if (linepad) linepad = 4 - linepad;
/* Fill XWD-color map */
if (grey)
{
vclass = 0;
ncolors = 256;
for (j = 0; j < ncolors; j++)
{
xwdcolmap[j].l_pixel = j;
xwdcolmap[j].l_red = (j << 8) | j;
xwdcolmap[j].l_green = (j << 8) | j;
xwdcolmap[j].l_blue = (j << 8) | j;
xwdcolmap[j].l_flags = 7;
xwdcolmap[j].l_pad = 0;
}
}
else
{
vclass = 3;
cmap = gimp_image_get_cmap (image_ID, &ncolors);
for (j = 0; j < ncolors; j++)
{
xwdcolmap[j].l_pixel = j;
xwdcolmap[j].l_red = ((*cmap) << 8) | *cmap; cmap++;
xwdcolmap[j].l_green = ((*cmap) << 8) | *cmap; cmap++;
xwdcolmap[j].l_blue = ((*cmap) << 8) | *cmap; cmap++;
xwdcolmap[j].l_flags = 7;
xwdcolmap[j].l_pad = 0;
}
}
/* Fill in the XWD header (header_size is evaluated by write_xwd_hdr ()) */
xwdhdr.l_header_size = 0;
xwdhdr.l_file_version = 7;
xwdhdr.l_pixmap_format = 2;
xwdhdr.l_pixmap_depth = 8;
xwdhdr.l_pixmap_width = width;
xwdhdr.l_pixmap_height = height;
xwdhdr.l_xoffset = 0;
xwdhdr.l_byte_order = 1;
xwdhdr.l_bitmap_unit = 32;
xwdhdr.l_bitmap_bit_order = 1;
xwdhdr.l_bitmap_pad = 32;
xwdhdr.l_bits_per_pixel = 8;
xwdhdr.l_bytes_per_line = width + linepad;
xwdhdr.l_visual_class = vclass;
xwdhdr.l_red_mask = 0x000000;
xwdhdr.l_green_mask = 0x000000;
xwdhdr.l_blue_mask = 0x000000;
xwdhdr.l_bits_per_rgb = 8;
xwdhdr.l_colormap_entries = ncolors;
xwdhdr.l_ncolors = ncolors;
xwdhdr.l_window_width = width;
xwdhdr.l_window_height = height;
xwdhdr.l_window_x = 64;
xwdhdr.l_window_y = 64;
xwdhdr.l_window_bdrwidth = 0;
write_xwd_header (ofp, &xwdhdr);
write_xwd_cols (ofp, &xwdhdr, xwdcolmap);
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0) /* Get more data */
{int scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i);
gimp_pixel_rgn_get_rect (&pixel_rgn, data, 0, i, width, scan_lines);
src = data;
}
fwrite (src, width, 1, ofp);
if (linepad) fwrite ((char *)&tmp, linepad, 1, ofp);
src += width;
if ((i % 20) == 0)
gimp_progress_update ((double) i / (double) height);
}
g_free (data);
gimp_drawable_detach (drawable);
if (ferror (ofp))
{
g_message (_("Error during writing indexed/grey image"));
return (FALSE);
}
return (TRUE);
}
static gint
save_rgb (FILE *ofp,
gint32 image_ID,
gint32 drawable_ID)
{
int height, width, linepad, tile_height, i;
long tmp = 0;
unsigned char *data, *src;
L_XWDFILEHEADER xwdhdr;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
#ifdef XWD_DEBUG
printf ("save_rgb ()\n");
#endif
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);
linepad = (width * 3) % 4;
if (linepad) linepad = 4 - linepad;
/* Fill in the XWD header (header_size is evaluated by write_xwd_hdr ()) */
xwdhdr.l_header_size = 0;
xwdhdr.l_file_version = 7;
xwdhdr.l_pixmap_format = 2;
xwdhdr.l_pixmap_depth = 24;
xwdhdr.l_pixmap_width = width;
xwdhdr.l_pixmap_height = height;
xwdhdr.l_xoffset = 0;
xwdhdr.l_byte_order = 1;
xwdhdr.l_bitmap_unit = 32;
xwdhdr.l_bitmap_bit_order = 1;
xwdhdr.l_bitmap_pad = 32;
xwdhdr.l_bits_per_pixel = 24;
xwdhdr.l_bytes_per_line = width * 3 + linepad;
xwdhdr.l_visual_class = 5;
xwdhdr.l_red_mask = 0xff0000;
xwdhdr.l_green_mask = 0x00ff00;
xwdhdr.l_blue_mask = 0x0000ff;
xwdhdr.l_bits_per_rgb = 8;
xwdhdr.l_colormap_entries = 0;
xwdhdr.l_ncolors = 0;
xwdhdr.l_window_width = width;
xwdhdr.l_window_height = height;
xwdhdr.l_window_x = 64;
xwdhdr.l_window_y = 64;
xwdhdr.l_window_bdrwidth = 0;
write_xwd_header (ofp, &xwdhdr);
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0) /* Get more data */
{int scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i);
gimp_pixel_rgn_get_rect (&pixel_rgn, data, 0, i, width, scan_lines);
src = data;
}
fwrite (src, width*3, 1, ofp);
if (linepad) fwrite ((char *)&tmp, linepad, 1, ofp);
src += width*3;
if ((i % 20) == 0)
gimp_progress_update ((double) i / (double) height);
}
g_free (data);
gimp_drawable_detach (drawable);
if (ferror (ofp))
{
g_message (_("Error during writing rgb image"));
return (FALSE);
}
return (TRUE);
}
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