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gimp/plug-ins/common/pix.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Alias|Wavefront pix/matte image reading and writing code
* Copyright (C) 1997 Mike Taylor
* (email: mtaylor@aw.sgi.com, WWW: http://reality.sgi.com/mtaylor)
*
* 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 plug-in was written using the online documentation from
* Alias|Wavefront Inc's PowerAnimator product.
*
* Bug reports or suggestions should be e-mailed to mtaylor@aw.sgi.com
*/
/* Event history:
* V 1.0, MT, 02-Jul-97: initial version of plug-in
* V 1.1, MT, 04-Dec-97: added .als file extension
*/
/* Features
* - loads and saves
* - 24-bit (.pix)
* - 8-bit (.matte, .alpha, or .mask) images
*
* NOTE: pix and matte files do not support alpha channels or indexed
* colour, so neither does this plug-in
*/
#include "config.h"
#include <errno.h>
#include <string.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define LOAD_PROC "file-pix-load"
#define SAVE_PROC "file-pix-save"
#define PLUG_IN_BINARY "pix"
/* #define PIX_DEBUG */
#ifdef PIX_DEBUG
# define PIX_DEBUG_PRINT(a,b) fprintf(stderr,a,b)
#else
# define PIX_DEBUG_PRINT(a,b)
#endif
/**************
* Prototypes *
**************/
/* Standard Plug-in Functions */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
/* Local Helper Functions */
static gint32 load_image (const gchar *filename);
static gboolean save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID);
static guint16 get_short (FILE *file);
static void put_short (guint16 value,
FILE *file);
/******************
* Implementation *
******************/
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
/*
* Description:
* Register the services provided by this plug-in
*/
static const 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 entered" }
};
static const GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static const 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 (LOAD_PROC,
"loads files of the Alias|Wavefront Pix file format",
"loads files of the Alias|Wavefront Pix file format",
"Michael Taylor",
"Michael Taylor",
"1997",
N_("Alias Pix image"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_load_handler (LOAD_PROC,
"pix,matte,mask,alpha,als",
"");
gimp_install_procedure (SAVE_PROC,
"save file in the Alias|Wavefront pix/matte file format",
"save file in the Alias|Wavefront pix/matte file format",
"Michael Taylor",
"Michael Taylor",
"1997",
N_("Alias Pix image"),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_save_handler (SAVE_PROC, "pix,matte,mask,alpha,als", "");
}
/*
* Description:
* perform registered plug-in function
*
* Arguments:
* name - name of the function to perform
* nparams - number of parameters passed to the function
* param - parameters passed to the function
* nreturn_vals - number of parameters returned by the function
* return_vals - parameters returned by the function
*/
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;
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, LOAD_PROC) == 0)
{
/* Perform the image load */
image_ID = load_image (param[1].data.d_string);
if (image_ID != -1)
{
/* The image load was successful */
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
/* The image load falied */
status = GIMP_PDB_EXECUTION_ERROR;
}
}
else if (strcmp (name, LOAD_PROC) == 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 (PLUG_IN_BINARY, FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "PIX",
(GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY));
if (export == GIMP_EXPORT_CANCEL)
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (! save_image (param[3].data.d_string, image_ID, drawable_ID))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image_ID);
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].data.d_status = status;
}
/*
* Description:
* Reads a 16-bit integer from a file in such a way that the machine's
* byte order should not matter.
*/
static guint16
get_short (FILE *file)
{
guchar buf[2];
fread (buf, 2, 1, file);
return (buf[0] << 8) + buf[1];
}
/*
* Description:
* Writes a 16-bit integer to a file in such a way that the machine's
* byte order should not matter.
*/
static void
put_short (guint16 value,
FILE *file)
{
guchar buf[2];
buf[0] = (value >> 8) & 0xFF;
buf[1] = value & 0xFF;
fwrite (buf, 2, 1, file);
}
/*
* Description:
* load the given image into gimp
*
* Arguments:
* filename - name on the file to read
*
* Return Value:
* Image id for the loaded image
*
*/
static gint32
load_image (const gchar *filename)
{
gint i, j, tile_height, row;
FILE *file = NULL;
guchar *dest;
guchar *dest_base;
GimpDrawable *drawable;
gint32 image_ID;
gint32 layer_ID;
GimpPixelRgn pixel_rgn;
gushort width, height, depth;
GimpImageBaseType imgtype;
GimpImageType gdtype;
PIX_DEBUG_PRINT ("Opening file: %s\n", filename);
file = g_fopen (filename, "rb");
if (NULL == file)
{
g_message (_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return -1;
}
gimp_progress_init_printf (_("Opening '%s'"),
gimp_filename_to_utf8 (filename));
/* Read header information */
width = get_short (file);
height = get_short (file);
get_short (file); /* Discard obsolete fields */
get_short (file); /* Discard obsolete fields */
depth = get_short (file);
PIX_DEBUG_PRINT ("Width %hu\n", width);
PIX_DEBUG_PRINT ("Height %hu\n", height);
if (depth == 8)
{
/* Loading a matte file */
imgtype = GIMP_GRAY;
gdtype = GIMP_GRAY_IMAGE;
}
else if (depth == 24)
{
/* Loading an RGB file */
imgtype = GIMP_RGB;
gdtype = GIMP_RGB_IMAGE;
}
else
{
/* Header is invalid */
fclose (file);
return -1;
}
image_ID = gimp_image_new (width, height, imgtype);
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);
tile_height = gimp_tile_height ();
if (depth == 24)
{
/* Read a 24-bit Pix image */
guchar record[4];
gint readlen;
tile_height = gimp_tile_height ();
dest_base = dest = g_new (guchar, 3 * width * tile_height);
for (i = 0; i < height;)
{
for (dest = dest_base, row = 0;
row < tile_height && i < height;
i++, row++)
{
guchar count;
/* Read a row of the image */
j = 0;
while (j < width)
{
readlen = fread (record, 1, 4, file);
if (readlen < 4)
break;
for (count = 0; count < record[0]; ++count)
{
dest[0] = record[3];
dest[1] = record[2];
dest[2] = record[1];
dest += 3;
j++;
if (j >= width)
break;
}
}
}
gimp_pixel_rgn_set_rect (&pixel_rgn, dest_base, 0, i-row,
width, row);
gimp_progress_update ((double) i / (double) height);
}
g_free (dest_base);
}
else
{
/* Read an 8-bit Matte image */
guchar record[2];
gint readlen;
dest_base = dest = g_new (guchar, width * tile_height);
for (i = 0; i < height;)
{
for (dest = dest_base, row = 0;
row < tile_height && i < height;
i++, row++)
{
guchar count;
/* Read a row of the image */
j = 0;
while (j < width)
{
readlen = fread(record, 1, 2, file);
if (readlen < 2)
break;
for (count = 0; count < record[0]; ++count)
{
dest[j] = record[1];
j++;
if (j >= width)
break;
}
}
dest += width;
}
gimp_pixel_rgn_set_rect (&pixel_rgn, dest_base, 0, i-row,
width, row);
gimp_progress_update ((double) i / (double) height);
}
g_free (dest_base);
}
gimp_drawable_flush (drawable);
gimp_drawable_detach (drawable);
fclose (file);
return image_ID;
}
/*
* Description:
* save the given file out as an alias pix or matte file
*
* Arguments:
* filename - name of file to save to
* image_ID - ID of image to save
* drawable_ID - current drawable
*/
static gboolean
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID)
{
gint depth, i, j, row, tile_height, writelen, rectHeight;
gboolean savingColor = TRUE;
guchar *src;
guchar *src_base;
GimpDrawable *drawable;
GimpPixelRgn pixel_rgn;
FILE *file;
/* Get info about image */
drawable = gimp_drawable_get (drawable_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, drawable->width,
drawable->height, FALSE, FALSE);
savingColor = gimp_drawable_is_rgb (drawable_ID);
depth = gimp_drawable_bpp (drawable_ID);
/* Open the output file. */
file = g_fopen (filename, "wb");
if (!file)
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return FALSE;
}
gimp_progress_init_printf (_("Saving '%s'"),
gimp_filename_to_utf8 (filename));
/* Write the image header */
PIX_DEBUG_PRINT ("Width %hu\n", drawable->width);
PIX_DEBUG_PRINT ("Height %hu\n", drawable->height);
put_short (drawable->width, file);
put_short (drawable->height, file);
put_short (0, file);
put_short (0, file);
tile_height = gimp_tile_height ();
src_base = g_new (guchar, tile_height * drawable->width * depth);
if (savingColor)
{
/* Writing a 24-bit Pix image */
guchar record[4];
put_short (24, file);
for (i = 0; i < drawable->height;)
{
rectHeight = (tile_height < (drawable->height - i - 1)) ?
tile_height : (drawable->height - i - 1);
gimp_pixel_rgn_get_rect (&pixel_rgn, src_base, 0, i,
drawable->width, rectHeight);
for (src = src_base, row = 0;
row < tile_height && i < drawable->height;
i += 1, row += 1)
{
/* Write a row of the image */
record[0] = 1;
record[3] = src[0];
record[2] = src[1];
record[1] = src[2];
src += depth;
for (j = 1; j < drawable->width; ++j)
{
if ((record[3] != src[0]) ||
(record[2] != src[1]) ||
(record[1] != src[2]) ||
(record[0] == 255))
{
/* Write current RLE record and start a new one */
writelen = fwrite (record, 1, 4, file);
record[0] = 1;
record[3] = src[0];
record[2] = src[1];
record[1] = src[2];
}
else
{
/* increment run length in current record */
record[0]++;
}
src += depth;
}
/* Write last record in row */
writelen = fwrite (record, 1, 4, file);
}
gimp_progress_update ((double) i / (double) drawable->height);
}
}
else
{
/* Writing a 8-bit Matte (Mask) image */
guchar record[2];
put_short (8, file);
for (i = 0; i < drawable->height;)
{
rectHeight = (tile_height < (drawable->height - i - 1)) ?
tile_height : (drawable->height - i - 1);
gimp_pixel_rgn_get_rect (&pixel_rgn, src_base, 0, i,
drawable->width, rectHeight);
for (src = src_base, row = 0;
row < tile_height && i < drawable->height;
i += 1, row += 1)
{
/* Write a row of the image */
record[0] = 1;
record[1] = src[0];
src += depth;
for (j = 1; j < drawable->width; ++j)
{
if ((record[1] != src[0]) || (record[0] == 255))
{
/* Write current RLE record and start a new one */
writelen = fwrite (record, 1, 2, file);
record[0] = 1;
record[1] = src[0];
}
else
{
/* increment run length in current record */
record[0] ++;
}
src += depth;
}
/* Write last record in row */
writelen = fwrite (record, 1, 2, file);
}
gimp_progress_update ((double) i / (double) drawable->height);
}
}
g_free (src_base);
fclose (file);
return TRUE;
}
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