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gimp/plug-ins/common/file-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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
/* 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 exports
* - 24-bit (.pix)
* - 8-bit (.matte, .alpha, or .mask) images
*
* NOTE: pix and matte files do not support alpha channels or indexed
* color, 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 "file-pix"
#define PLUG_IN_ROLE "gimp-file-pix"
/* #define PIX_DEBUG */
#ifdef PIX_DEBUG
# define PIX_DEBUG_PRINT(a,b) g_printerr (a,b)
#else
# define PIX_DEBUG_PRINT(a,b)
#endif
/**************
* Prototypes *
**************/
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 (GFile *file,
GError **error);
static gboolean save_image (GFile *file,
gint32 image_ID,
gint32 drawable_ID,
GError **error);
static gboolean get_short (GInputStream *input,
guint16 *value,
GError **error);
static gboolean put_short (GOutputStream *output,
guint16 value,
GError **error);
/******************
* 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", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ 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", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to export" },
{ GIMP_PDB_STRING, "filename", "The name of the file to export the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to export 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_file_handler_uri (LOAD_PROC);
gimp_register_load_handler (LOAD_PROC, "pix,matte,mask,alpha,als", "");
gimp_install_procedure (SAVE_PROC,
"export file in the Alias|Wavefront pix/matte file format",
"export file in the Alias|Wavefront pix/matte file format",
"Michael Taylor",
"Michael Taylor",
"1997",
N_("Alias Pix image"),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_file_handler_uri (SAVE_PROC);
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;
GError *error = NULL;
INIT_I18N ();
gegl_init (NULL, NULL);
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (strcmp (name, LOAD_PROC) == 0)
{
/* Perform the image load */
image_ID = load_image (g_file_new_for_uri (param[1].data.d_string),
&error);
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, SAVE_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 |
GIMP_EXPORT_CAN_HANDLE_INDEXED);
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 (g_file_new_for_uri (param[3].data.d_string),
image_ID, drawable_ID,
&error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image_ID);
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
if (status != GIMP_PDB_SUCCESS && error)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_STRING;
values[1].data.d_string = error->message;
}
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 gboolean
get_short (GInputStream *input,
guint16 *value,
GError **error)
{
guchar buf[2];
gsize bytes_read;
if (! g_input_stream_read_all (input, buf, 2,
&bytes_read, NULL, error) ||
bytes_read != 2)
{
return FALSE;
}
if (value)
*value = (buf[0] << 8) + buf[1];
return TRUE;
}
/*
* Description:
* Writes a 16-bit integer to a file in such a way that the machine's
* byte order should not matter.
*/
static gboolean
put_short (GOutputStream *output,
guint16 value,
GError **error)
{
guchar buf[2];
buf[0] = (value >> 8) & 0xFF;
buf[1] = value & 0xFF;
return g_output_stream_write_all (output, buf, 2, NULL, NULL, error);
}
/*
* 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 (GFile *file,
GError **error)
{
GInputStream *input;
GeglBuffer *buffer;
GimpImageBaseType imgtype;
GimpImageType gdtype;
guchar *dest;
guchar *dest_base;
gint32 image_ID;
gint32 layer_ID;
gushort width, height, depth;
gint i, j, tile_height, row;
PIX_DEBUG_PRINT ("Opening file: %s\n", filename);
gimp_progress_init_printf (_("Opening '%s'"),
g_file_get_parse_name (file));
input = G_INPUT_STREAM (g_file_read (file, NULL, error));
if (! input)
return -1;
/* Read header information */
if (! get_short (input, &width, error) ||
! get_short (input, &height, error) ||
! get_short (input, NULL, error) || /* Discard obsolete field */
! get_short (input, NULL, error) || /* Discard obsolete field */
! get_short (input, &depth, error))
{
g_object_unref (input);
return -1;
}
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 */
g_object_unref (input);
return -1;
}
image_ID = gimp_image_new (width, height, imgtype);
gimp_image_set_filename (image_ID, g_file_get_uri (file));
layer_ID = gimp_layer_new (image_ID, _("Background"),
width, height,
gdtype,
100, GIMP_LAYER_MODE_NORMAL);
gimp_image_insert_layer (image_ID, layer_ID, -1, 0);
buffer = gimp_drawable_get_buffer (layer_ID);
tile_height = gimp_tile_height ();
if (depth == 24)
{
/* Read a 24-bit Pix image */
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 record[4];
gsize bytes_read;
guchar count;
/* Read a row of the image */
j = 0;
while (j < width)
{
if (! g_input_stream_read_all (input, record, 4,
&bytes_read, NULL, error) ||
bytes_read != 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;
}
}
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, i - row, width, row), 0,
NULL, dest_base, GEGL_AUTO_ROWSTRIDE);
gimp_progress_update ((double) i / (double) height);
}
g_free (dest_base);
}
else
{
/* Read an 8-bit Matte image */
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 record[2];
gsize bytes_read;
guchar count;
/* Read a row of the image */
j = 0;
while (j < width)
{
if (! g_input_stream_read_all (input, record, 2,
&bytes_read, NULL, error) ||
bytes_read != 2)
break;
for (count = 0; count < record[0]; ++count)
{
dest[j] = record[1];
j++;
if (j >= width)
break;
}
}
dest += width;
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, i - row, width, row), 0,
NULL, dest_base, GEGL_AUTO_ROWSTRIDE);
gimp_progress_update ((double) i / (double) height);
}
g_free (dest_base);
}
g_object_unref (buffer);
g_object_unref (input);
gimp_progress_update (1.0);
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 (GFile *file,
gint32 image_ID,
gint32 drawable_ID,
GError **error)
{
GOutputStream *output;
GeglBuffer *buffer;
const Babl *format;
gint width;
gint height;
gint depth, i, j, row, tile_height, rectHeight;
gboolean savingColor = TRUE;
guchar *src;
guchar *src_base;
gimp_progress_init_printf (_("Exporting '%s'"),
g_file_get_parse_name (file));
output = G_OUTPUT_STREAM (g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE,
NULL, error));
if (! output)
return FALSE;
/* Get info about image */
buffer = gimp_drawable_get_buffer (drawable_ID);
width = gegl_buffer_get_width (buffer);
height = gegl_buffer_get_height (buffer);
savingColor = ! gimp_drawable_is_gray (drawable_ID);
if (savingColor)
format = babl_format ("R'G'B' u8");
else
format = babl_format ("Y' u8");
depth = babl_format_get_bytes_per_pixel (format);
/* Write the image header */
PIX_DEBUG_PRINT ("Width %hu\n", width);
PIX_DEBUG_PRINT ("Height %hu\n", height);
if (! put_short (output, width, error) ||
! put_short (output, height, error) ||
! put_short (output, 0, error) ||
! put_short (output, 0, error))
{
g_object_unref (output);
g_object_unref (buffer);
return FALSE;
}
tile_height = gimp_tile_height ();
src_base = g_new (guchar, tile_height * width * depth);
if (savingColor)
{
/* Writing a 24-bit Pix image */
if (! put_short (output, 24, error))
goto fail;
for (i = 0; i < height;)
{
rectHeight = (tile_height < (height - i)) ?
tile_height : (height - i);
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, i, width, rectHeight), 1.0,
format, src_base,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
for (src = src_base, row = 0;
row < tile_height && i < height;
i += 1, row += 1)
{
/* Write a row of the image */
guchar record[4];
record[0] = 1;
record[3] = src[0];
record[2] = src[1];
record[1] = src[2];
src += depth;
for (j = 1; j < 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 */
if (! g_output_stream_write_all (output, record, 4,
NULL, NULL, error))
{
goto fail;
}
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 */
if (! g_output_stream_write_all (output, record, 4,
NULL, NULL, error))
{
goto fail;
}
}
gimp_progress_update ((double) i / (double) height);
}
}
else
{
/* Writing a 8-bit Matte (Mask) image */
if (! put_short (output, 8, error))
goto fail;
for (i = 0; i < height;)
{
rectHeight = (tile_height < (height - i)) ?
tile_height : (height - i);
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, i, width, rectHeight), 1.0,
format, src_base,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
for (src = src_base, row = 0;
row < tile_height && i < height;
i += 1, row += 1)
{
/* Write a row of the image */
guchar record[2];
record[0] = 1;
record[1] = src[0];
src += depth;
for (j = 1; j < width; ++j)
{
if ((record[1] != src[0]) || (record[0] == 255))
{
/* Write current RLE record and start a new one */
if (! g_output_stream_write_all (output, record, 2,
NULL, NULL, error))
{
goto fail;
}
record[0] = 1;
record[1] = src[0];
}
else
{
/* increment run length in current record */
record[0] ++;
}
src += depth;
}
/* Write last record in row */
if (! g_output_stream_write_all (output, record, 2,
NULL, NULL, error))
{
goto fail;
}
}
gimp_progress_update ((double) i / (double) height);
}
}
g_free (src_base);
g_object_unref (output);
g_object_unref (buffer);
gimp_progress_update (1.0);
return TRUE;
fail:
g_free (src_base);
g_object_unref (output);
g_object_unref (buffer);
return FALSE;
}
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