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-rw-r--r--plug-ins/common/align-layers.c748
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diff --git a/plug-ins/common/align-layers.c b/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 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/>.
+ */
+
+#include "config.h"
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+#define PLUG_IN_PROC "plug-in-align-layers"
+#define PLUG_IN_BINARY "align-layers"
+#define PLUG_IN_ROLE "gimp-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
+};
+
+
+typedef struct
+{
+ gint step_x;
+ gint step_y;
+ gint base_x;
+ gint base_y;
+} AlignData;
+
+
+static void query (void);
+static void run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+
+/* Main function */
+static GimpPDBStatusType align_layers (gint32 image_id);
+
+/* Helpers and internal functions */
+static gint align_layers_count_visibles_layers (gint *layers,
+ gint length);
+static gint align_layers_find_last_layer (gint *layers,
+ gint layers_num,
+ gboolean *found);
+static gint align_layers_spread_visibles_layers (gint *layers,
+ gint layers_num,
+ gint *layers_array);
+static gint * align_layers_spread_image (gint32 image_id,
+ gint *layer_num);
+static gint align_layers_find_background (gint32 image_id);
+static AlignData align_layers_gather_data (gint *layers,
+ gint layer_num,
+ gint background);
+static void align_layers_perform_alignment (gint *layers,
+ gint layer_num,
+ AlignData data);
+static void align_layers_get_align_offsets (gint32 drawable_id,
+ gint *x,
+ gint *y);
+static gint align_layers_dialog (void);
+
+
+
+const 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 const GimpParamDef 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", "Input drawable (not used)"},
+ { GIMP_PDB_INT32, "link-after-alignment", "Link the visible layers after alignment { TRUE, FALSE }"},
+ { GIMP_PDB_INT32, "use-bottom", "use the bottom layer as the base of alignment { TRUE, FALSE }"}
+ };
+
+ gimp_install_procedure (PLUG_IN_PROC,
+ N_("Align all visible layers of the image"),
+ "Align visible layers",
+ "Shuji Narazaki <narazaki@InetQ.or.jp>",
+ "Shuji Narazaki",
+ "1997",
+ N_("Align Visi_ble Layers..."),
+ "RGB*,GRAY*,INDEXED*",
+ GIMP_PLUGIN,
+ G_N_ELEMENTS (args), 0,
+ args, NULL);
+
+ gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Image/Arrange");
+}
+
+static void
+run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ static GimpParam values[2];
+ GimpPDBStatusType status = GIMP_PDB_EXECUTION_ERROR;
+ GimpRunMode run_mode;
+ gint image_id, layer_num;
+ gint *layers;
+
+ 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:
+ layers = gimp_image_get_layers (image_id, &layer_num);
+ layer_num = align_layers_count_visibles_layers (layers,
+ layer_num);
+ g_free (layers);
+ if (layer_num < 2)
+ {
+ *nreturn_vals = 2;
+ values[1].type = GIMP_PDB_STRING;
+ values[1].data.d_string = _("There are not enough layers to align.");
+ return;
+ }
+ gimp_get_data (PLUG_IN_PROC, &VALS);
+ VALS.grid_size = MAX (VALS.grid_size, 1);
+ if (! align_layers_dialog ())
+ return;
+ break;
+
+ case GIMP_RUN_NONINTERACTIVE:
+ break;
+
+ case GIMP_RUN_WITH_LAST_VALS:
+ gimp_get_data (PLUG_IN_PROC, &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_PROC, &VALS, sizeof (ValueType));
+
+ values[0].data.d_status = status;
+}
+
+/*
+ * Main function
+ */
+static GimpPDBStatusType
+align_layers (gint32 image_id)
+{
+ gint layer_num = 0;
+ gint *layers = NULL;
+ gint background = 0;
+ AlignData data;
+
+ layers = align_layers_spread_image (image_id, &layer_num);
+ if (layer_num < 2)
+ {
+ g_free (layers);
+ return GIMP_PDB_EXECUTION_ERROR;
+ }
+
+ background = align_layers_find_background (image_id);
+
+ /* If we want to ignore the bottom layer and if it's visible */
+ if (VALS.ignore_bottom && background == layers[layer_num - 1])
+ {
+ layer_num--;
+ }
+
+ data = align_layers_gather_data (layers,
+ layer_num,
+ background);
+
+ gimp_image_undo_group_start (image_id);
+
+ align_layers_perform_alignment (layers,
+ layer_num,
+ data);
+
+ gimp_image_undo_group_end (image_id);
+
+ g_free (layers);
+
+ return GIMP_PDB_SUCCESS;
+}
+
+/*
+ * Find the bottommost layer, visible or not
+ * The image must contain at least one layer.
+ */
+static gint
+align_layers_find_last_layer (gint *layers,
+ gint layers_num,
+ gboolean *found)
+{
+ gint i;
+
+ for (i = layers_num - 1; i >= 0; i--)
+ {
+ gint item = layers[i];
+
+ if (gimp_item_is_group (item))
+ {
+ gint *children;
+ gint children_num;
+ gint last_layer;
+
+ children = gimp_item_get_children (item, &children_num);
+ last_layer = align_layers_find_last_layer (children,
+ children_num,
+ found);
+ g_free (children);
+ if (*found)
+ return last_layer;
+ }
+ else if (gimp_item_is_layer (item))
+ {
+ *found = TRUE;
+ return item;
+ }
+ }
+
+ /* should never happen */
+ return -1;
+}
+
+/*
+ * Return the bottom layer.
+ */
+static gint
+align_layers_find_background (gint32 image_id)
+{
+ gint *layers;
+ gint layers_num;
+ gint background;
+ gboolean found = FALSE;
+
+ layers = gimp_image_get_layers (image_id, &layers_num);
+ background = align_layers_find_last_layer (layers,
+ layers_num,
+ &found);
+ g_free (layers);
+
+ return background;
+}
+
+/*
+ * Fill layers_array with all visible layers.
+ * layers_array needs to be allocated before the call
+ */
+static gint
+align_layers_spread_visibles_layers (gint *layers,
+ gint layers_num,
+ gint *layers_array)
+{
+ gint i;
+ gint index = 0;
+
+ for (i = 0; i < layers_num; i++)
+ {
+ gint item = layers[i];
+
+ if (gimp_item_get_visible (item))
+ {
+ if (gimp_item_is_group (item))
+ {
+ gint *children;
+ gint children_num;
+
+ children = gimp_item_get_children (item, &children_num);
+ index += align_layers_spread_visibles_layers (children,
+ children_num,
+ &(layers_array[index]));
+ g_free (children);
+ }
+ else if (gimp_item_is_layer (item))
+ {
+ layers_array[index] = item;
+ index++;
+ }
+ }
+ }
+
+ return index;
+}
+
+/*
+ * Return a contiguous array of all visible layers
+ */
+static gint *
+align_layers_spread_image (gint32 image_id,
+ gint *layer_num)
+{
+ gint *layers;
+ gint *layers_array;
+ gint layer_num_loc;
+
+ layers = gimp_image_get_layers (image_id, &layer_num_loc);
+ *layer_num = align_layers_count_visibles_layers (layers,
+ layer_num_loc);
+
+ layers_array = g_malloc (sizeof (gint) * *layer_num);
+
+ align_layers_spread_visibles_layers (layers,
+ layer_num_loc,
+ layers_array);
+ g_free (layers);
+
+ return layers_array;
+}
+
+static gint
+align_layers_count_visibles_layers (gint *layers,
+ gint length)
+{
+ gint i;
+ gint count = 0;
+
+ for (i = 0; i<length; i++)
+ {
+ gint item = layers[i];
+
+ if (gimp_item_get_visible (item))
+ {
+ if (gimp_item_is_group (item))
+ {
+ gint *children;
+ gint children_num;
+
+ children = gimp_item_get_children (item, &children_num);
+ count += align_layers_count_visibles_layers (children,
+ children_num);
+ g_free (children);
+ }
+ else if (gimp_item_is_layer (item))
+ {
+ count += 1;
+ }
+ }
+ }
+
+ return count;
+}
+
+static AlignData
+align_layers_gather_data (gint *layers,
+ gint layer_num,
+ gint background)
+{
+ AlignData data;
+ gint min_x = G_MAXINT;
+ gint min_y = G_MAXINT;
+ gint max_x = G_MININT;
+ gint max_y = G_MININT;
+ gint index;
+ gint orig_x = 0;
+ gint orig_y = 0;
+ gint offset_x = 0;
+ gint offset_y = 0;
+
+ data.step_x = 0;
+ data.step_y = 0;
+ data.base_x = 0;
+ data.base_y = 0;
+
+ /* 0 is the top layer */
+ for (index = 0; index < layer_num; 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;
+
+ min_x = MIN (min_x, orig_x);
+ max_x = MAX (max_x, orig_x);
+ min_y = MIN (min_y, orig_y);
+ max_y = MAX (max_y, orig_y);
+ }
+
+ if (VALS.base_is_bottom_layer)
+ {
+ gimp_drawable_offsets (background, &orig_x, &orig_y);
+
+ align_layers_get_align_offsets (background,
+ &offset_x,
+ &offset_y);
+ orig_x += offset_x;
+ orig_y += offset_y;
+ data.base_x = min_x = orig_x;
+ data.base_y = min_y = orig_y;
+ }
+
+ if (layer_num > 1)
+ {
+ data.step_x = (max_x - min_x) / (layer_num - 1);
+ data.step_y = (max_y - min_y) / (layer_num - 1);
+ }
+
+ if ( (VALS.h_style == LEFT2RIGHT) || (VALS.h_style == RIGHT2LEFT))
+ data.base_x = min_x;
+
+ if ( (VALS.v_style == TOP2BOTTOM) || (VALS.v_style == BOTTOM2TOP))
+ data.base_y = min_y;
+
+ return data;
+}
+
+/*
+ * Modifies position of each visible layers
+ * according to data.
+ */
+static void
+align_layers_perform_alignment (gint *layers,
+ gint layer_num,
+ AlignData data)
+{
+ gint index;
+
+ for (index = 0; index < layer_num; index++)
+ {
+ gint x = 0;
+ gint y = 0;
+ gint orig_x;
+ gint orig_y;
+ gint offset_x;
+ gint offset_y;
+
+ 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 = data.base_x - offset_x;
+ break;
+ case LEFT2RIGHT:
+ x = (data.base_x + index * data.step_x) - offset_x;
+ break;
+ case RIGHT2LEFT:
+ x = (data.base_x + (layer_num - index - 1) * data.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 = data.base_y - offset_y;
+ break;
+ case TOP2BOTTOM:
+ y = (data.base_y + index * data.step_y) - offset_y;
+ break;
+ case BOTTOM2TOP:
+ y = (data.base_y + (layer_num - index - 1) * data.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);
+ }
+}
+
+static void
+align_layers_get_align_offsets (gint32 drawable_id,
+ gint *x,
+ gint *y)
+{
+ gint width = gimp_drawable_width (drawable_id);
+ gint height = gimp_drawable_height (drawable_id);
+
+ switch (VALS.h_base)
+ {
+ case H_BASE_LEFT:
+ *x = 0;
+ break;
+ case H_BASE_CENTER:
+ *x = width / 2;
+ break;
+ case H_BASE_RIGHT:
+ *x = width;
+ break;
+ default:
+ *x = 0;
+ break;
+ }
+
+ switch (VALS.v_base)
+ {
+ case V_BASE_TOP:
+ *y = 0;
+ break;
+ case V_BASE_CENTER:
+ *y = height / 2;
+ break;
+ case V_BASE_BOTTOM:
+ *y = height;
+ break;
+ default:
+ *y = 0;
+ break;
+ }
+}
+
+static int
+align_layers_dialog (void)
+{
+ GtkWidget *dialog;
+ GtkWidget *table;
+ GtkWidget *combo;
+ GtkWidget *toggle;
+ GtkObject *adj;
+ gboolean run;
+
+ gimp_ui_init (PLUG_IN_BINARY, FALSE);
+
+ dialog = gimp_dialog_new (_("Align Visible Layers"), PLUG_IN_ROLE,
+ NULL, 0,
+ gimp_standard_help_func, PLUG_IN_PROC,
+
+ _("_Cancel"), GTK_RESPONSE_CANCEL,
+ _("_OK"), GTK_RESPONSE_OK,
+
+ NULL);
+
+ gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
+ GTK_RESPONSE_OK,
+ GTK_RESPONSE_CANCEL,
+ -1);
+
+ gimp_window_set_transient (GTK_WINDOW (dialog));
+
+ 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_get_content_area (GTK_DIALOG (dialog))),
+ table, FALSE, FALSE, 0);
+ gtk_widget_show (table);
+
+ combo = gimp_int_combo_box_new (C_("align-style", "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 (C_("align-style", "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, 1, 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 (dialog);
+
+ run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
+
+ gtk_widget_destroy (dialog);
+
+ return run;
+}
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