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gimp/plug-ins/common/align_layers.c

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/* align_layers.c
* Author: Shuji Narazaki <narazaki@InetQ.or.jp>
* Version: 0.26
*
* Copyright (C) 1997-1998 Shuji Narazaki <narazaki@InetQ.or.jp>
*
* 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.
*/
#include "config.h"
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_NAME "plug_in_align_layers"
#define SHORT_NAME "align_layers"
#define HELP_ID "plug-in-align-layers"
#define SCALE_WIDTH 150
enum
{
H_NONE,
H_COLLECT,
LEFT2RIGHT,
RIGHT2LEFT,
SNAP2HGRID
};
enum
{
H_BASE_LEFT,
H_BASE_CENTER,
H_BASE_RIGHT
};
enum
{
V_NONE,
V_COLLECT,
TOP2BOTTOM,
BOTTOM2TOP,
SNAP2VGRID
};
enum
{
V_BASE_TOP,
V_BASE_CENTER,
V_BASE_BOTTOM
};
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static GimpPDBStatusType align_layers (gint32 image_id);
static void align_layers_get_align_offsets (gint32 drawable_id,
gint *x,
gint *y);
static gint align_layers_dialog (void);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* dialog variables */
typedef struct
{
gint h_style;
gint h_base;
gint v_style;
gint v_base;
gboolean ignore_bottom;
gboolean base_is_bottom_layer;
gint grid_size;
} ValueType;
static ValueType VALS =
{
H_NONE,
H_BASE_LEFT,
V_NONE,
V_BASE_TOP,
TRUE,
FALSE,
10
};
MAIN ()
static void
query (void)
{
static GimpParamDef args [] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive"},
{ GIMP_PDB_IMAGE, "image", "Input image"},
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable (not used)"},
{ GIMP_PDB_INT32, "link-afteer-alignment", "Link the visible layers after alignment"},
{ GIMP_PDB_INT32, "use-bottom", "use the bottom layer as the base of alignment"}
};
gimp_install_procedure (PLUG_IN_NAME,
"Align visible layers",
"Align visible layers",
"Shuji Narazaki <narazaki@InetQ.or.jp>",
"Shuji Narazaki",
"1997",
N_("Align _Visible Layers..."),
"RGB*,GRAY*,INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_NAME,
N_("<Image>/Layer"));
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_EXECUTION_ERROR;
GimpRunMode run_mode;
gint image_id, layer_num;
run_mode = param[0].data.d_int32;
image_id = param[1].data.d_int32;
INIT_I18N ();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
switch ( run_mode )
{
case GIMP_RUN_INTERACTIVE:
gimp_image_get_layers (image_id, &layer_num);
if (layer_num < 2)
{
g_message (_("There are not enough layers to align."));
return;
}
gimp_get_data (PLUG_IN_NAME, &VALS);
if (! align_layers_dialog ())
return;
break;
case GIMP_RUN_NONINTERACTIVE:
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_NAME, &VALS);
break;
}
status = align_layers (image_id);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
if (run_mode == GIMP_RUN_INTERACTIVE && status == GIMP_PDB_SUCCESS)
gimp_set_data (PLUG_IN_NAME, &VALS, sizeof (ValueType));
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
}
static GimpPDBStatusType
align_layers (gint32 image_id)
{
gint layer_num = 0;
gint visible_layer_num = 0;
gint *layers = NULL;
gint index;
gint vindex;
gint step_x = 0;
gint step_y = 0;
gint x = 0;
gint y = 0;
gint orig_x = 0;
gint orig_y = 0;
gint offset_x = 0;
gint offset_y = 0;
gint base_x = 0;
gint base_y = 0;
gint bg_index = 0;
layers = gimp_image_get_layers (image_id, &layer_num);
bg_index = layer_num - 1;
for (index = 0; index < layer_num; index++)
{
if (gimp_drawable_get_visible (layers[index]))
visible_layer_num++;
}
if (VALS.ignore_bottom)
{
layer_num--;
if (gimp_drawable_get_visible (layers[bg_index]))
visible_layer_num--;
}
if (0 < visible_layer_num)
{
gint min_x = G_MAXINT;
gint min_y = G_MAXINT;
gint max_x = G_MININT;
gint max_y = G_MININT;
/* 0 is the top layer */
for (index = 0; index < layer_num; index++)
{
if (gimp_drawable_get_visible (layers[index]))
{
gimp_drawable_offsets (layers[index], &orig_x, &orig_y);
align_layers_get_align_offsets (layers[index], &offset_x,
&offset_y);
orig_x += offset_x;
orig_y += offset_y;
if ( orig_x < min_x ) min_x = orig_x;
if ( max_x < orig_x ) max_x = orig_x;
if ( orig_y < min_y ) min_y = orig_y;
if ( max_y < orig_y ) max_y = orig_y;
}
}
if (VALS.base_is_bottom_layer)
{
gimp_drawable_offsets (layers[bg_index], &orig_x, &orig_y);
align_layers_get_align_offsets (layers[bg_index], &offset_x,
&offset_y);
orig_x += offset_x;
orig_y += offset_y;
base_x = min_x = orig_x;
base_y = min_y = orig_y;
}
if (visible_layer_num > 1)
{
step_x = (max_x - min_x) / (visible_layer_num - 1);
step_y = (max_y - min_y) / (visible_layer_num - 1);
}
if ( (VALS.h_style == LEFT2RIGHT) || (VALS.h_style == RIGHT2LEFT))
base_x = min_x;
if ( (VALS.v_style == TOP2BOTTOM) || (VALS.v_style == BOTTOM2TOP))
base_y = min_y;
}
gimp_image_undo_group_start (image_id);
for (vindex = -1, index = 0; index < layer_num; index++)
{
if (gimp_drawable_get_visible (layers[index]))
vindex++;
else
continue;
gimp_drawable_offsets (layers[index], &orig_x, &orig_y);
align_layers_get_align_offsets (layers[index], &offset_x, &offset_y);
switch (VALS.h_style)
{
case H_NONE:
x = orig_x;
break;
case H_COLLECT:
x = base_x - offset_x;
break;
case LEFT2RIGHT:
x = (base_x + vindex * step_x) - offset_x;
break;
case RIGHT2LEFT:
x = (base_x + (visible_layer_num - vindex - 1) * step_x) - offset_x;
break;
case SNAP2HGRID:
x = VALS.grid_size
* (int) ((orig_x + offset_x + VALS.grid_size /2) / VALS.grid_size)
- offset_x;
break;
}
switch (VALS.v_style)
{
case V_NONE:
y = orig_y;
break;
case V_COLLECT:
y = base_y - offset_y;
break;
case TOP2BOTTOM:
y = (base_y + vindex * step_y) - offset_y;
break;
case BOTTOM2TOP:
y = (base_y + (visible_layer_num - vindex - 1) * step_y) - offset_y;
break;
case SNAP2VGRID:
y = VALS.grid_size
* (int) ((orig_y + offset_y + VALS.grid_size / 2) / VALS.grid_size)
- offset_y;
break;
}
gimp_layer_set_offsets (layers[index], x, y);
}
gimp_image_undo_group_end (image_id);
return GIMP_PDB_SUCCESS;
}
static void
align_layers_get_align_offsets (gint32 drawable_id,
gint *x,
gint *y)
{
GimpDrawable *layer = gimp_drawable_get (drawable_id);
switch (VALS.h_base)
{
case H_BASE_LEFT:
*x = 0;
break;
case H_BASE_CENTER:
*x = layer->width / 2;
break;
case H_BASE_RIGHT:
*x = layer->width;
break;
default:
*x = 0;
break;
}
switch (VALS.v_base)
{
case V_BASE_TOP:
*y = 0;
break;
case V_BASE_CENTER:
*y = layer->height / 2;
break;
case V_BASE_BOTTOM:
*y = layer->height;
break;
default:
*y = 0;
break;
}
gimp_drawable_detach (layer);
}
static int
align_layers_dialog (void)
{
GtkWidget *dlg;
GtkWidget *table;
GtkWidget *combo;
GtkWidget *toggle;
GtkObject *adj;
gboolean run;
gimp_ui_init (SHORT_NAME, FALSE);
dlg = gimp_dialog_new (_("Align Visible Layers"), SHORT_NAME,
NULL, 0,
gimp_standard_help_func, HELP_ID,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
table = gtk_table_new (7, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_container_set_border_width (GTK_CONTAINER (table), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), table,
FALSE, FALSE, 0);
gtk_widget_show (table);
combo = gimp_int_combo_box_new (_("None"), H_NONE,
_("Collect"), H_COLLECT,
_("Fill (left to right)"), LEFT2RIGHT,
_("Fill (right to left)"), RIGHT2LEFT,
_("Snap to grid"), SNAP2HGRID,
NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), VALS.h_style);
g_signal_connect (combo, "changed",
G_CALLBACK (gimp_int_combo_box_get_active),
&VALS.h_style);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("_Horizontal style:"), 0.0, 0.5,
combo, 2, FALSE);
combo = gimp_int_combo_box_new (_("Left edge"), H_BASE_LEFT,
_("Center"), H_BASE_CENTER,
_("Right edge"), H_BASE_RIGHT,
NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), VALS.h_base);
g_signal_connect (combo, "changed",
G_CALLBACK (gimp_int_combo_box_get_active),
&VALS.h_base);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("Ho_rizontal base:"), 0.0, 0.5,
combo, 2, FALSE);
combo = gimp_int_combo_box_new (_("None"), V_NONE,
_("Collect"), V_COLLECT,
_("Fill (top to bottom)"), TOP2BOTTOM,
_("Fill (bottom to top)"), BOTTOM2TOP,
_("Snap to grid"), SNAP2VGRID,
NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), VALS.v_style);
g_signal_connect (combo, "changed",
G_CALLBACK (gimp_int_combo_box_get_active),
&VALS.v_style);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
_("_Vertical style:"), 0.0, 0.5,
combo, 2, FALSE);
combo = gimp_int_combo_box_new (_("Top edge"), V_BASE_TOP,
_("Center"), V_BASE_CENTER,
_("Bottom edge"), V_BASE_BOTTOM,
NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), VALS.v_base);
g_signal_connect (combo, "changed",
G_CALLBACK (gimp_int_combo_box_get_active),
&VALS.v_base);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 3,
_("Ver_tical base:"), 0.0, 0.5,
combo, 2, FALSE);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 4,
_("_Grid size:"), SCALE_WIDTH, 0,
VALS.grid_size, 0, 200, 1, 10, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&VALS.grid_size);
toggle = gtk_check_button_new_with_mnemonic
(_("_Ignore the bottom layer even if visible"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), VALS.ignore_bottom);
gtk_table_attach_defaults (GTK_TABLE (table), toggle, 0, 3, 5, 6);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&VALS.ignore_bottom);
toggle = gtk_check_button_new_with_mnemonic
(_("_Use the (invisible) bottom layer as the base"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
VALS.base_is_bottom_layer);
gtk_table_attach_defaults (GTK_TABLE (table), toggle, 0, 3, 6, 7);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&VALS.base_is_bottom_layer);
gtk_widget_show (dlg);
run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dlg);
return run;
}
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