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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 <https://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 EXPORT_PROC "file-pix-export"
#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
typedef struct _Pix Pix;
typedef struct _PixClass PixClass;
struct _Pix
{
GimpPlugIn parent_instance;
};
struct _PixClass
{
GimpPlugInClass parent_class;
};
#define PIX_TYPE (pix_get_type ())
#define PIX(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIX_TYPE, Pix))
GType pix_get_type (void) G_GNUC_CONST;
static GList * pix_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * pix_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * pix_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer run_data);
static GimpValueArray * pix_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data);
static GimpImage * load_image (GFile *file,
GError **error);
static GimpImage * load_esm_image (GInputStream *input,
GError **error);
static gboolean export_image (GFile *file,
GimpImage *image,
GimpDrawable *drawable,
GError **error);
static gboolean get_short (GInputStream *input,
guint16 *value,
GError **error);
static gboolean put_short (GOutputStream *output,
guint16 value,
GError **error);
G_DEFINE_TYPE (Pix, pix, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (PIX_TYPE)
DEFINE_STD_SET_I18N
static void
pix_class_init (PixClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = pix_query_procedures;
plug_in_class->create_procedure = pix_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
pix_init (Pix *pix)
{
}
static GList *
pix_query_procedures (GimpPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_PROC));
list = g_list_append (list, g_strdup (EXPORT_PROC));
return list;
}
static GimpProcedure *
pix_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = gimp_load_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
pix_load, NULL, NULL);
gimp_file_procedure_set_handles_remote (GIMP_FILE_PROCEDURE (procedure),
TRUE);
gimp_procedure_set_menu_label (procedure, _("Alias Pix image"));
gimp_procedure_set_documentation (procedure,
"Loads files of the Alias|Wavefront "
"or Esm Software Pix file format",
"Loads files of the Alias|Wavefront "
"or Esm Software Pix file format",
name);
gimp_procedure_set_attribution (procedure,
"Michael Taylor",
"Michael Taylor",
"1997");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"pix,matte,mask,alpha,als");
/* Magic Number for Esm Software PIX files */
gimp_file_procedure_set_magics (GIMP_FILE_PROCEDURE (procedure),
"0,string,Esm Software PIX file");
}
else if (! strcmp (name, EXPORT_PROC))
{
procedure = gimp_export_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
FALSE, pix_export, NULL, NULL);
gimp_procedure_set_image_types (procedure, "*");
gimp_file_procedure_set_handles_remote (GIMP_FILE_PROCEDURE (procedure),
TRUE);
gimp_procedure_set_menu_label (procedure, _("Alias Pix image"));
gimp_procedure_set_documentation (procedure,
"Export file in the Alias|Wavefront "
"pix/matte file format",
"Export file in the Alias|Wavefront "
"pix/matte file format",
name);
gimp_procedure_set_attribution (procedure,
"Michael Taylor",
"Michael Taylor",
"1997");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"pix,matte,mask,alpha,als");
}
return procedure;
}
static GimpValueArray *
pix_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpImage *image;
GError *error = NULL;
gegl_init (NULL, NULL);
image = load_image (file, &error);
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static GimpValueArray *
pix_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpExportReturn export = GIMP_EXPORT_IGNORE;
GList *drawables;
GError *error = NULL;
gegl_init (NULL, NULL);
export = gimp_export_image (&image,
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED);
drawables = gimp_image_list_layers (image);
if (! export_image (file, image, drawables->data, &error))
{
status = GIMP_PDB_EXECUTION_ERROR;
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image);
g_list_free (drawables);
return gimp_procedure_new_return_values (procedure, status, error);
}
/*
* 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 GimpImage *
load_image (GFile *file,
GError **error)
{
GInputStream *input;
GeglBuffer *buffer;
GimpImageBaseType imgtype;
GimpImageType gdtype;
guchar *dest;
guchar *dest_base;
GimpImage *image = NULL;
GimpLayer *layer;
gushort width, height, depth;
gint i, j, tile_height, row;
PIX_DEBUG_PRINT ("Opening file: %s\n", gimp_file_get_utf8_name (file));
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 NULL;
/* 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 NULL;
}
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
{
/* Check if this is Esm Software PIX file format */
gchar esm_header[22];
gsize bytes_read;
g_seekable_seek (G_SEEKABLE (input), 0, G_SEEK_SET, NULL, NULL);
if (g_input_stream_read_all (input, &esm_header, sizeof (esm_header),
&bytes_read, NULL, NULL))
{
esm_header[21] = '\0';
if (g_str_has_prefix (esm_header, "Esm Software PIX file"))
image = load_esm_image (input, error);
if (image)
{
g_object_unref (input);
gimp_progress_update (1.0);
return image;
}
}
/* Header is invalid */
g_object_unref (input);
return NULL;
}
image = gimp_image_new (width, height, imgtype);
layer = gimp_layer_new (image, _("Background"),
width, height,
gdtype,
100,
gimp_image_get_default_new_layer_mode (image));
gimp_image_insert_layer (image, layer, NULL, 0);
buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
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;
}
static GimpImage *
load_esm_image (GInputStream *input,
GError **error)
{
GimpImage *image = NULL;
GFile *temp_file = NULL;
FILE *fp;
goffset file_size;
g_seekable_seek (G_SEEKABLE (input), 0, G_SEEK_END, NULL, error);
file_size = g_seekable_tell (G_SEEKABLE (input));
g_seekable_seek (G_SEEKABLE (input), 21, G_SEEK_SET, NULL, error);
/* Esm Software PIX format is just a JPEG with an extra 21 byte header */
temp_file = gimp_temp_file ("jpeg");
fp = g_fopen (g_file_peek_path (temp_file), "wb");
if (! fp)
{
g_file_delete (temp_file, NULL, NULL);
g_object_unref (temp_file);
g_message (_("Error trying to open temporary JPEG file '%s' "
"for Esm Software pix loading: %s"),
gimp_file_get_utf8_name (temp_file),
g_strerror (errno));
return NULL;
}
else
{
GimpProcedure *procedure;
GimpValueArray *return_vals;
guchar buffer[file_size - 21];
if (! g_input_stream_read_all (input, buffer, sizeof (buffer),
NULL, NULL, error))
{
g_file_delete (temp_file, NULL, NULL);
g_object_unref (temp_file);
g_printerr (_("Invalid Esm Software PIX file"));
return NULL;
}
fwrite (buffer, sizeof (guchar), file_size, fp);
fclose (fp);
procedure = gimp_pdb_lookup_procedure (gimp_get_pdb (), "file-jpeg-load");
return_vals = gimp_procedure_run (procedure,
"run-mode", GIMP_RUN_NONINTERACTIVE,
"file", temp_file,
NULL);
if (return_vals)
{
image = g_value_get_object (gimp_value_array_index (return_vals, 1));
gimp_value_array_unref (return_vals);
}
g_file_delete (temp_file, NULL, NULL);
g_object_unref (temp_file);
}
return image;
}
/*
* Description:
* export the given file out as an alias pix or matte file
*
* Arguments:
* filename - name of file to export to
* image - image to export
* drawable - current drawable
*/
static gboolean
export_image (GFile *file,
GimpImage *image,
GimpDrawable *drawable,
GError **error)
{
GOutputStream *output;
GeglBuffer *buffer;
const Babl *format;
GCancellable *cancellable;
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);
width = gegl_buffer_get_width (buffer);
height = gegl_buffer_get_height (buffer);
savingColor = ! gimp_drawable_is_gray (drawable);
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))
{
cancellable = g_cancellable_new ();
g_cancellable_cancel (cancellable);
g_output_stream_close (output, cancellable, NULL);
g_object_unref (cancellable);
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:
cancellable = g_cancellable_new ();
g_cancellable_cancel (cancellable);
g_output_stream_close (output, cancellable, NULL);
g_object_unref (cancellable);
g_free (src_base);
g_object_unref (output);
g_object_unref (buffer);
return FALSE;
}
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