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gimp/plug-ins/common/file-gbr.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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/>.
*/
/*
* gbr plug-in version 1.00
* Loads/saves version 2 GIMP .gbr files, by Tim Newsome <drz@frody.bloke.com>
* Some bits stolen from the .99.7 source tree.
*
* Added in GBR version 1 support after learning that there wasn't a
* tool to read them.
* July 6, 1998 by Seth Burgess <sjburges@gimp.org>
*
* Dec 17, 2000
* Load and save GIMP brushes in GRAY or RGBA. jtl + neo
*
*
* TODO: Give some better error reporting on not opening files/bad headers
* etc.
*/
#include "config.h"
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib/gstdio.h>
#include <glib.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "app/core/gimpbrush-header.h"
#include "app/core/gimppattern-header.h"
#include "libgimp/stdplugins-intl.h"
#define LOAD_PROC "file-gbr-load"
#define SAVE_PROC "file-gbr-save"
#define PLUG_IN_BINARY "file-gbr"
typedef struct
{
gchar description[256];
gint spacing;
} BrushInfo;
/* local function 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 (const gchar *filename,
GError **error);
static gboolean save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
GError **error);
static gboolean save_dialog (void);
static void entry_callback (GtkWidget *widget,
gpointer data);
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* private variables */
static BrushInfo info =
{
"GIMP Brush",
10
};
MAIN ()
static void
query (void)
{
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 of the file to load" }
};
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 save" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to save the image in" },
{ GIMP_PDB_INT32, "spacing", "Spacing of the brush" },
{ GIMP_PDB_STRING, "description", "Short description of the brush" }
};
gimp_install_procedure (LOAD_PROC,
"Loads GIMP brushes",
"Loads GIMP brushes (1 or 4 bpp and old .gpb format)",
"Tim Newsome, Jens Lautenbacher, Sven Neumann",
"Tim Newsome, Jens Lautenbacher, Sven Neumann",
"1997-2005",
N_("GIMP brush"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_plugin_icon_register (LOAD_PROC, GIMP_ICON_TYPE_STOCK_ID,
(const guint8 *) GIMP_STOCK_BRUSH);
gimp_register_file_handler_mime (LOAD_PROC, "image/x-gimp-gbr");
gimp_register_magic_load_handler (LOAD_PROC,
"gbr, gpb",
"",
"20, string, GIMP");
gimp_install_procedure (SAVE_PROC,
"Saves files in the GIMP brush file format",
"Saves files in the GIMP brush file format",
"Tim Newsome, Jens Lautenbacher, Sven Neumann",
"Tim Newsome, Jens Lautenbacher, Sven Neumann",
"1997-2000",
N_("GIMP brush"),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_plugin_icon_register (SAVE_PROC, GIMP_ICON_TYPE_STOCK_ID,
(const guint8 *) GIMP_STOCK_BRUSH);
gimp_register_file_handler_mime (SAVE_PROC, "image/x-gimp-gbr");
gimp_register_save_handler (SAVE_PROC, "gbr", "");
}
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;
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)
{
image_ID = load_image (param[1].data.d_string, &error);
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, SAVE_PROC) == 0)
{
GimpParasite *parasite;
gint32 orig_image_ID;
image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
orig_image_ID = image_ID;
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, NULL,
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_ALPHA);
if (export == GIMP_EXPORT_CANCEL)
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
/* Possibly retrieve data */
gimp_get_data (SAVE_PROC, &info);
break;
default:
break;
}
parasite = gimp_image_parasite_find (orig_image_ID, "gimp-brush-name");
if (parasite)
{
gchar *name = g_strndup (gimp_parasite_data (parasite),
gimp_parasite_data_size (parasite));
gimp_parasite_free (parasite);
strncpy (info.description, name, sizeof (info.description));
info.description[sizeof (info.description) - 1] = '\0';
}
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
if (! save_dialog ())
status = GIMP_PDB_CANCEL;
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 7)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
info.spacing = (param[5].data.d_int32);
strncpy (info.description, param[6].data.d_string,
sizeof (info.description));
info.description[sizeof (info.description) - 1] = '\0';
}
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (save_image (param[3].data.d_string, image_ID, drawable_ID,
&error))
{
gimp_set_data (SAVE_PROC, &info, sizeof (info));
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image_ID);
if (info.description && strlen (info.description))
{
gimp_image_attach_new_parasite (orig_image_ID, "gimp-brush-name",
GIMP_PARASITE_PERSISTENT,
strlen (info.description) + 1,
info.description);
}
else
{
gimp_image_parasite_detach (orig_image_ID, "gimp-brush-name");
}
}
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;
}
static gint32
load_image (const gchar *filename,
GError **error)
{
gchar *name;
gint fd;
BrushHeader bh;
guchar *brush_buf = NULL;
gint32 image_ID;
gint32 layer_ID;
GimpDrawable *drawable;
GimpPixelRgn pixel_rgn;
gint bn_size;
GimpImageBaseType base_type;
GimpImageType image_type;
gssize size;
fd = g_open (filename, O_RDONLY | _O_BINARY, 0);
if (fd == -1)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("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));
if (read (fd, &bh, sizeof (BrushHeader)) != sizeof (BrushHeader))
{
close (fd);
return -1;
}
/* rearrange the bytes in each unsigned int */
bh.header_size = g_ntohl (bh.header_size);
bh.version = g_ntohl (bh.version);
bh.width = g_ntohl (bh.width);
bh.height = g_ntohl (bh.height);
bh.bytes = g_ntohl (bh.bytes);
bh.magic_number = g_ntohl (bh.magic_number);
bh.spacing = g_ntohl (bh.spacing);
switch (bh.version)
{
case 1:
/* Version 1 didn't have a magic number and had no spacing */
bh.spacing = 25;
/* And we need to rewind the handle, 4 due spacing and 4 due magic */
lseek (fd, -8, SEEK_CUR);
bh.header_size += 8;
break;
case 3: /* cinepaint brush */
if (bh.bytes == 18 /* FLOAT16_GRAY_GIMAGE */)
{
bh.bytes = 2;
}
else
{
g_message (_("Unsupported brush format"));
close (fd);
return -1;
}
/* fallthrough */
case 2:
if (bh.magic_number == GBRUSH_MAGIC &&
bh.header_size > sizeof (BrushHeader))
break;
default:
g_message (_("Unsupported brush format"));
close (fd);
return -1;
}
if ((bn_size = (bh.header_size - sizeof (BrushHeader))) > 0)
{
gchar *temp = g_new (gchar, bn_size);
if ((read (fd, temp, bn_size)) < bn_size)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error in GIMP brush file '%s'"),
gimp_filename_to_utf8 (filename));
close (fd);
g_free (temp);
return -1;
}
name = gimp_any_to_utf8 (temp, -1,
_("Invalid UTF-8 string in brush file '%s'."),
gimp_filename_to_utf8 (filename));
g_free (temp);
}
else
{
name = g_strdup (_("Unnamed"));
}
/* Now there's just raw data left. */
size = bh.width * bh.height * bh.bytes;
brush_buf = g_malloc (size);
if (read (fd, brush_buf, size) != size)
{
close (fd);
g_free (brush_buf);
g_free (name);
return -1;
}
switch (bh.bytes)
{
case 1:
{
PatternHeader ph;
/* For backwards-compatibility, check if a pattern follows.
The obsolete .gpb format did it this way. */
if (read (fd, &ph, sizeof (PatternHeader)) == sizeof(PatternHeader))
{
/* rearrange the bytes in each unsigned int */
ph.header_size = g_ntohl (ph.header_size);
ph.version = g_ntohl (ph.version);
ph.width = g_ntohl (ph.width);
ph.height = g_ntohl (ph.height);
ph.bytes = g_ntohl (ph.bytes);
ph.magic_number = g_ntohl (ph.magic_number);
if (ph.magic_number == GPATTERN_MAGIC &&
ph.version == 1 &&
ph.header_size > sizeof (PatternHeader) &&
ph.bytes == 3 &&
ph.width == bh.width &&
ph.height == bh.height &&
lseek (fd, ph.header_size - sizeof (PatternHeader),
SEEK_CUR) > 0)
{
guchar *plain_brush = brush_buf;
gint i;
bh.bytes = 4;
brush_buf = g_malloc (4 * bh.width * bh.height);
for (i = 0; i < ph.width * ph.height; i++)
{
if (read (fd, brush_buf + i * 4, 3) != 3)
{
close (fd);
g_free (name);
g_free (plain_brush);
g_free (brush_buf);
return -1;
}
brush_buf[i * 4 + 3] = plain_brush[i];
}
g_free (plain_brush);
}
}
}
break;
case 2:
{
guint16 *buf = (guint16 *) brush_buf;
gint i;
for (i = 0; i < bh.width * bh.height; i++, buf++)
{
union
{
guint16 u[2];
gfloat f;
} short_float;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
short_float.u[0] = 0;
short_float.u[1] = GUINT16_FROM_BE (*buf);
#else
short_float.u[0] = GUINT16_FROM_BE (*buf);
short_float.u[1] = 0;
#endif
brush_buf[i] = (guchar) (short_float.f * 255.0 + 0.5);
}
bh.bytes = 1;
}
break;
default:
break;
}
/*
* Create a new image of the proper size and
* associate the filename with it.
*/
switch (bh.bytes)
{
case 1:
base_type = GIMP_GRAY;
image_type = GIMP_GRAY_IMAGE;
break;
case 4:
base_type = GIMP_RGB;
image_type = GIMP_RGBA_IMAGE;
break;
default:
g_message ("Unsupported brush depth: %d\n"
"GIMP Brushes must be GRAY or RGBA\n",
bh.bytes);
return -1;
}
image_ID = gimp_image_new (bh.width, bh.height, base_type);
gimp_image_set_filename (image_ID, filename);
gimp_image_attach_new_parasite (image_ID, "gimp-brush-name",
GIMP_PARASITE_PERSISTENT,
strlen (name) + 1, name);
layer_ID = gimp_layer_new (image_ID, name, bh.width, bh.height,
image_type, 100, GIMP_NORMAL_MODE);
gimp_image_add_layer (image_ID, layer_ID, 0);
g_free (name);
drawable = gimp_drawable_get (layer_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height,
TRUE, FALSE);
gimp_pixel_rgn_set_rect (&pixel_rgn, brush_buf,
0, 0, bh.width, bh.height);
g_free (brush_buf);
if (image_type == GIMP_GRAY_IMAGE)
gimp_invert (layer_ID);
close (fd);
gimp_drawable_flush (drawable);
gimp_progress_update (1.0);
return image_ID;
}
static gboolean
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID,
GError **error)
{
gint fd;
BrushHeader bh;
guchar *buffer;
GimpDrawable *drawable;
gint line;
gint x;
gint bpp;
GimpPixelRgn pixel_rgn;
GimpRGB gray, white;
gimp_rgba_set_uchar (&white, 255, 255, 255, 255);
switch (gimp_drawable_type (drawable_ID))
{
case GIMP_RGB_IMAGE:
case GIMP_RGBA_IMAGE:
bpp = 4;
break;
case GIMP_GRAY_IMAGE:
case GIMP_GRAYA_IMAGE:
bpp = 1;
break;
default:
{
g_message (_("GIMP brushes are either GRAYSCALE or RGBA"));
return FALSE;
}
}
fd = g_open (filename, O_CREAT | O_TRUNC | O_WRONLY | _O_BINARY, 0666);
if (fd == -1)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("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));
drawable = gimp_drawable_get (drawable_ID);
bh.header_size = g_htonl (sizeof (BrushHeader) +
strlen (info.description) + 1);
bh.version = g_htonl (2);
bh.width = g_htonl (drawable->width);
bh.height = g_htonl (drawable->height);
bh.bytes = g_htonl (bpp);
bh.magic_number = g_htonl (GBRUSH_MAGIC);
bh.spacing = g_htonl (info.spacing);
if (write (fd, &bh, sizeof (BrushHeader)) != sizeof (BrushHeader))
{
close (fd);
return FALSE;
}
if (write (fd, info.description, strlen (info.description) + 1) !=
strlen (info.description) + 1)
{
close (fd);
return FALSE;
}
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height,
FALSE, FALSE);
buffer = g_new (guchar, drawable->width * MAX (bpp, drawable->bpp));
for (line = 0; line < drawable->height; line++)
{
gimp_pixel_rgn_get_row (&pixel_rgn, buffer, 0, line, drawable->width);
switch (drawable->bpp)
{
case 1:
/* invert */
for (x = 0; x < drawable->width; x++)
buffer[x] = 255 - buffer[x];
break;
case 2:
for (x = 0; x < drawable->width; x++)
{
/* apply alpha channel */
gimp_rgba_set_uchar (&gray,
buffer[2 * x],
buffer[2 * x],
buffer[2 * x],
buffer[2 * x + 1]);
gimp_rgb_composite (&gray, &white, GIMP_RGB_COMPOSITE_BEHIND);
gimp_rgba_get_uchar (&gray, &buffer[x], NULL, NULL, NULL);
/* invert */
buffer[x] = 255 - buffer[x];
}
break;
case 3:
/* add alpha channel */
for (x = drawable->width - 1; x >= 0; x--)
{
buffer[x * 4 + 3] = 0xFF;
buffer[x * 4 + 2] = buffer[x * 3 + 2];
buffer[x * 4 + 1] = buffer[x * 3 + 1];
buffer[x * 4 + 0] = buffer[x * 3 + 0];
}
break;
}
if (write (fd, buffer, drawable->width * bpp) != drawable->width * bpp)
{
g_free (buffer);
close (fd);
return FALSE;
}
gimp_progress_update ((gdouble) line / (gdouble) drawable->height);
}
g_free (buffer);
gimp_drawable_detach (drawable);
close (fd);
return TRUE;
}
static gboolean
save_dialog (void)
{
GtkWidget *dialog;
GtkWidget *table;
GtkWidget *entry;
GtkWidget *spinbutton;
GtkObject *adj;
gboolean run;
dialog = gimp_export_dialog_new (_("Brush"), PLUG_IN_BINARY, SAVE_PROC);
/* The main table */
table = gtk_table_new (2, 2, FALSE);
gtk_container_set_border_width (GTK_CONTAINER (table), 12);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_box_pack_start (GTK_BOX (gimp_export_dialog_get_content_area (dialog)),
table, TRUE, TRUE, 0);
gtk_widget_show (table);
spinbutton = gimp_spin_button_new (&adj,
info.spacing, 1, 1000, 1, 10, 0, 1, 0);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("Spacing:"), 1.0, 0.5,
spinbutton, 1, TRUE);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_int_adjustment_update),
&info.spacing);
entry = gtk_entry_new ();
gtk_widget_set_size_request (entry, 200, -1);
gtk_entry_set_text (GTK_ENTRY (entry), info.description);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("Description:"), 1.0, 0.5,
entry, 1, FALSE);
g_signal_connect (entry, "changed",
G_CALLBACK (entry_callback),
info.description);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static void
entry_callback (GtkWidget *widget,
gpointer data)
{
strncpy (info.description, gtk_entry_get_text (GTK_ENTRY (widget)),
sizeof (info.description));
info.description[sizeof (info.description) - 1] = '\0';
}
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