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gimp/app/core/gimp-edit.c

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/* The GIMP -- an 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include "appenv.h"
#include "actionarea.h"
#include "drawable.h"
#include "floating_sel.h"
#include "gdisplay.h"
#include "gimage.h"
#include "gimage_mask.h"
#include "general.h"
#include "global_edit.h"
#include "interface.h"
#include "layer.h"
#include "linked.h"
#include "paint_funcs.h"
#include "tools.h"
#include "undo.h"
/* The named paste dialog */
typedef struct _PasteNamedDlg PasteNamedDlg;
struct _PasteNamedDlg
{
GtkWidget *shell;
GtkWidget *list;
int paste_into;
GDisplay *gdisp;
};
/* The named buffer structure... */
typedef struct _named_buffer NamedBuffer;
struct _named_buffer
{
TileManager * buf;
char * name;
};
/* The named buffer list */
link_ptr named_buffers = NULL;
/* The global edit buffer */
TileManager * global_buf = NULL;
/* Crop the buffer to the size of pixels with non-zero transparency */
TileManager *
crop_buffer (TileManager *tiles,
int border)
{
PixelRegion PR;
TileManager *new_tiles;
int bytes, alpha;
unsigned char * data;
int empty;
int x1, y1, x2, y2;
int x, y;
int ex, ey;
int found;
void * pr;
unsigned char black[MAX_CHANNELS] = { 0, 0, 0, 0 };
bytes = tiles->levels[0].bpp;
alpha = bytes - 1;
/* go through and calculate the bounds */
x1 = tiles->levels[0].width;
y1 = tiles->levels[0].height;
x2 = 0;
y2 = 0;
pixel_region_init (&PR, tiles, 0, 0, x1, y1, FALSE);
for (pr = pixel_regions_register (1, &PR); pr != NULL; pr = pixel_regions_process (pr))
{
data = PR.data + alpha;
ex = PR.x + PR.w;
ey = PR.y + PR.h;
for (y = PR.y; y < ey; y++)
{
found = FALSE;
for (x = PR.x; x < ex; x++, data+=bytes)
if (*data)
{
if (x < x1)
x1 = x;
if (x > x2)
x2 = x;
found = TRUE;
}
if (found)
{
if (y < y1)
y1 = y;
if (y > y2)
y2 = y;
}
}
}
x2 = BOUNDS (x2 + 1, 0, tiles->levels[0].width);
y2 = BOUNDS (y2 + 1, 0, tiles->levels[0].height);
empty = (x1 == tiles->levels[0].width && y1 == tiles->levels[0].height);
/* If there are no visible pixels, return NULL */
if (empty)
new_tiles = NULL;
/* If no cropping, return original buffer */
else if (x1 == 0 && y1 == 0 && x2 == tiles->levels[0].width &&
y2 == tiles->levels[0].height && border == 0)
new_tiles = tiles;
/* Otherwise, crop the original area */
else
{
PixelRegion srcPR, destPR;
int new_width, new_height;
new_width = (x2 - x1) + border * 2;
new_height = (y2 - y1) + border * 2;
new_tiles = tile_manager_new (new_width, new_height, bytes);
/* If there is a border, make sure to clear the new tiles first */
if (border)
{
pixel_region_init (&destPR, new_tiles, 0, 0, new_width, border, TRUE);
color_region (&destPR, black);
pixel_region_init (&destPR, new_tiles, 0, border, border, (y2 - y1), TRUE);
color_region (&destPR, black);
pixel_region_init (&destPR, new_tiles, new_width - border, border, border, (y2 - y1), TRUE);
color_region (&destPR, black);
pixel_region_init (&destPR, new_tiles, 0, new_height - border, new_width, border, TRUE);
color_region (&destPR, black);
}
pixel_region_init (&srcPR, tiles, x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, new_tiles, border, border, (x2 - x1), (y2 - y1), TRUE);
copy_region (&srcPR, &destPR);
new_tiles->x = x1;
new_tiles->y = y1;
}
return new_tiles;
}
TileManager *
edit_cut (GImage *gimage,
int drawable_id)
{
TileManager *cut;
TileManager *cropped_cut;
int empty;
if (!gimage || drawable_id == -1)
return NULL;
/* Start a group undo */
undo_push_group_start (gimage, EDIT_CUT_UNDO);
/* See if the gimage mask is empty */
empty = gimage_mask_is_empty (gimage);
/* Next, cut the mask portion from the gimage */
cut = gimage_mask_extract (gimage, drawable_id, TRUE, FALSE);
/* Only crop if the gimage mask wasn't empty */
if (cut && empty == FALSE)
{
cropped_cut = crop_buffer (cut, 0);
if (cropped_cut != cut)
tile_manager_destroy (cut);
}
else if (cut)
cropped_cut = cut;
else
cropped_cut = NULL;
/* end the group undo */
undo_push_group_end (gimage);
if (cropped_cut)
{
/* Free the old global edit buffer */
if (global_buf)
tile_manager_destroy (global_buf);
/* Set the global edit buffer */
global_buf = cropped_cut;
return cropped_cut;
}
else
return NULL;
}
TileManager *
edit_copy (GImage *gimage,
int drawable_id)
{
TileManager * copy;
TileManager * cropped_copy;
int empty;
if (!gimage || drawable_id == -1)
return NULL;
/* See if the gimage mask is empty */
empty = gimage_mask_is_empty (gimage);
/* First, copy the masked portion of the gimage */
copy = gimage_mask_extract (gimage, drawable_id, FALSE, FALSE);
/* Only crop if the gimage mask wasn't empty */
if (copy && empty == FALSE)
{
cropped_copy = crop_buffer (copy, 0);
if (cropped_copy != copy)
tile_manager_destroy (copy);
}
else if (copy)
cropped_copy = copy;
else
cropped_copy = NULL;
if (cropped_copy)
{
/* Free the old global edit buffer */
if (global_buf)
tile_manager_destroy (global_buf);
/* Set the global edit buffer */
global_buf = cropped_copy;
return cropped_copy;
}
else
return NULL;
}
int
edit_paste (GImage *gimage,
int drawable_id,
TileManager *paste,
int paste_into)
{
Layer * float_layer;
int x1, y1, x2, y2;
int cx, cy;
/* Make a new floating layer */
float_layer = layer_from_tiles (gimage, drawable_id, paste, "Pasted Layer", OPAQUE, NORMAL);
if (float_layer)
{
/* Start a group undo */
undo_push_group_start (gimage, EDIT_PASTE_UNDO);
/* Set the offsets to the center of the image */
drawable_offsets (drawable_id, &cx, &cy);
drawable_mask_bounds (drawable_id, &x1, &y1, &x2, &y2);
cx += (x1 + x2) >> 1;
cy += (y1 + y2) >> 1;
float_layer->offset_x = cx - (float_layer->width >> 1);
float_layer->offset_y = cy - (float_layer->height >> 1);
/* If there is a selection mask clear it--
* this might not always be desired, but in general,
* it seems like the correct behavior.
*/
if (! gimage_mask_is_empty (gimage) && !paste_into)
channel_clear (gimage_get_mask (gimage));
/* add a new floating selection */
floating_sel_attach (float_layer, drawable_id);
/* end the group undo */
undo_push_group_end (gimage);
return float_layer->ID;
}
else
return 0;
}
int
edit_clear (GImage *gimage,
int drawable_id)
{
TileManager *buf_tiles;
PixelRegion bufPR;
int x1, y1, x2, y2;
unsigned char col[MAX_CHANNELS];
if (!gimage || drawable_id == -1)
return FALSE;
gimage_get_background (gimage, drawable_id, col);
if (drawable_has_alpha (drawable_id))
col [drawable_bytes (drawable_id) - 1] = OPAQUE;
drawable_mask_bounds (drawable_id, &x1, &y1, &x2, &y2);
if (!(x2 - x1) || !(y2 - y1))
return FALSE;
buf_tiles = tile_manager_new ((x2 - x1), (y2 - y1), drawable_bytes (drawable_id));
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), TRUE);
color_region (&bufPR, col);
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), FALSE);
gimage_apply_image (gimage, drawable_id, &bufPR, 1, OPAQUE,
ERASE_MODE, NULL, x1, y1);
/* update the image */
drawable_update (drawable_id, x1, y1, (x2 - x1), (y2 - y1));
/* free the temporary tiles */
tile_manager_destroy (buf_tiles);
return TRUE;
}
int
edit_fill (GImage *gimage,
int drawable_id)
{
TileManager *buf_tiles;
PixelRegion bufPR;
int x1, y1, x2, y2;
unsigned char col[MAX_CHANNELS];
if (!gimage || drawable_id == -1)
return FALSE;
gimage_get_background (gimage, drawable_id, col);
if (drawable_has_alpha (drawable_id))
col [drawable_bytes (drawable_id) - 1] = OPAQUE;
drawable_mask_bounds (drawable_id, &x1, &y1, &x2, &y2);
if (!(x2 - x1) || !(y2 - y1))
return FALSE;
buf_tiles = tile_manager_new ((x2 - x1), (y2 - y1), drawable_bytes (drawable_id));
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), TRUE);
color_region (&bufPR, col);
pixel_region_init (&bufPR, buf_tiles, 0, 0, (x2 - x1), (y2 - y1), FALSE);
gimage_apply_image (gimage, drawable_id, &bufPR, 1, OPAQUE,
NORMAL_MODE, NULL, x1, y1);
/* update the image */
drawable_update (drawable_id, x1, y1, (x2 - x1), (y2 - y1));
/* free the temporary tiles */
tile_manager_destroy (buf_tiles);
return TRUE;
}
int
global_edit_cut (void *gdisp_ptr)
{
GDisplay *gdisp;
/* stop any active tool */
gdisp = (GDisplay *) gdisp_ptr;
active_tool_control (HALT, gdisp_ptr);
if (!edit_cut (gdisp->gimage, gimage_active_drawable (gdisp->gimage)))
return FALSE;
else
{
/* flush the display */
gdisplays_flush ();
return TRUE;
}
}
int
global_edit_copy (void *gdisp_ptr)
{
GDisplay *gdisp;
gdisp = (GDisplay *) gdisp_ptr;
if (!edit_copy (gdisp->gimage, gimage_active_drawable (gdisp->gimage)))
return FALSE;
else
return TRUE;
}
int
global_edit_paste (void *gdisp_ptr,
int paste_into)
{
GDisplay *gdisp;
/* stop any active tool */
gdisp = (GDisplay *) gdisp_ptr;
active_tool_control (HALT, gdisp_ptr);
if (!edit_paste (gdisp->gimage, gimage_active_drawable (gdisp->gimage), global_buf, paste_into))
return FALSE;
else
{
/* flush the display */
gdisplays_flush ();
return TRUE;
}
}
void
global_edit_free ()
{
if (global_buf)
tile_manager_destroy (global_buf);
global_buf = NULL;
}
/*********************************************/
/* Named buffer operations */
static void
set_list_of_named_buffers (GtkWidget *list_widget)
{
link_ptr list;
NamedBuffer *nb;
GtkWidget *list_item;
gtk_list_clear_items (GTK_LIST (list_widget), 0, -1);
list = named_buffers;
while (list)
{
nb = (NamedBuffer *) list->data;
list = next_item (list);
list_item = gtk_list_item_new_with_label (nb->name);
gtk_container_add (GTK_CONTAINER (list_widget), list_item);
gtk_widget_show (list_item);
gtk_object_set_user_data (GTK_OBJECT (list_item), (gpointer) nb);
}
}
static void
named_buffer_paste_foreach (GtkWidget *w,
gpointer client_data)
{
PasteNamedDlg *pn_dlg;
NamedBuffer *nb;
if (w->state == GTK_STATE_SELECTED)
{
pn_dlg = (PasteNamedDlg *) client_data;
nb = (NamedBuffer *) gtk_object_get_user_data (GTK_OBJECT (w));
edit_paste (pn_dlg->gdisp->gimage,
gimage_active_drawable (pn_dlg->gdisp->gimage),
nb->buf, pn_dlg->paste_into);
}
}
static void
named_buffer_paste_callback (GtkWidget *w,
gpointer client_data)
{
PasteNamedDlg *pn_dlg;
pn_dlg = (PasteNamedDlg *) client_data;
gtk_container_foreach ((GtkContainer*) pn_dlg->list,
named_buffer_paste_foreach, client_data);
/* Destroy the box */
gtk_widget_destroy (pn_dlg->shell);
g_free (pn_dlg);
}
static void
named_buffer_delete_foreach (GtkWidget *w,
gpointer client_data)
{
PasteNamedDlg *pn_dlg;
NamedBuffer * nb;
if (w->state == GTK_STATE_SELECTED)
{
pn_dlg = (PasteNamedDlg *) client_data;
nb = (NamedBuffer *) gtk_object_get_user_data (GTK_OBJECT (w));
named_buffers = remove_from_list (named_buffers, (void *) nb);
g_free (nb->name);
tile_manager_destroy (nb->buf);
g_free (nb);
}
}
static void
named_buffer_delete_callback (GtkWidget *w,
gpointer client_data)
{
PasteNamedDlg *pn_dlg;
pn_dlg = (PasteNamedDlg *) client_data;
gtk_container_foreach ((GtkContainer*) pn_dlg->list,
named_buffer_delete_foreach, client_data);
set_list_of_named_buffers (pn_dlg->list);
}
static void
named_buffer_cancel_callback (GtkWidget *w,
gpointer client_data)
{
PasteNamedDlg *pn_dlg;
pn_dlg = (PasteNamedDlg *) client_data;
/* Destroy the box */
gtk_widget_destroy (pn_dlg->shell);
g_free (pn_dlg);
}
static gint
named_buffer_dialog_delete_callback (GtkWidget *w,
GdkEvent *e,
gpointer client_data)
{
named_buffer_cancel_callback (w, client_data);
return FALSE;
}
static void
named_buffer_paste_into_update (GtkWidget *w,
gpointer client_data)
{
PasteNamedDlg *pn_dlg;
pn_dlg = (PasteNamedDlg *) client_data;
if (GTK_TOGGLE_BUTTON (w)->active)
pn_dlg->paste_into = FALSE;
else
pn_dlg->paste_into = TRUE;
}
static void
paste_named_buffer (GDisplay *gdisp)
{
static ActionAreaItem action_items[3] =
{
{ "Paste", named_buffer_paste_callback, NULL, NULL },
{ "Delete", named_buffer_delete_callback, NULL, NULL },
{ "Cancel", named_buffer_cancel_callback, NULL, NULL }
};
PasteNamedDlg *pn_dlg;
GtkWidget *vbox;
GtkWidget *label;
GtkWidget *paste_into;
GtkWidget *listbox;
pn_dlg = (PasteNamedDlg *) g_malloc (sizeof (PasteNamedDlg));
pn_dlg->gdisp = gdisp;
pn_dlg->shell = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (pn_dlg->shell), "Paste Named Buffer");
gtk_window_position (GTK_WINDOW (pn_dlg->shell), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (pn_dlg->shell), "delete_event",
GTK_SIGNAL_FUNC (named_buffer_dialog_delete_callback),
pn_dlg);
vbox = gtk_vbox_new (FALSE, 1);
gtk_container_border_width (GTK_CONTAINER (vbox), 1);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (pn_dlg->shell)->vbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
label = gtk_label_new ("Select a buffer to paste:");
gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, FALSE, 0);
gtk_widget_show (label);
listbox = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (listbox),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_box_pack_start (GTK_BOX (vbox), listbox, TRUE, TRUE, 0);
gtk_widget_set_usize (listbox, 125, 150);
gtk_widget_show (listbox);
pn_dlg->list = gtk_list_new ();
gtk_list_set_selection_mode (GTK_LIST (pn_dlg->list), GTK_SELECTION_BROWSE);
gtk_container_add (GTK_CONTAINER (listbox), pn_dlg->list);
set_list_of_named_buffers (pn_dlg->list);
gtk_widget_show (pn_dlg->list);
paste_into = gtk_check_button_new_with_label ("Replace Current Selection");
gtk_box_pack_start (GTK_BOX (vbox), paste_into, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (paste_into), "toggled",
(GtkSignalFunc) named_buffer_paste_into_update,
pn_dlg);
gtk_widget_show (paste_into);
action_items[0].user_data = pn_dlg;
action_items[1].user_data = pn_dlg;
action_items[2].user_data = pn_dlg;
build_action_area (GTK_DIALOG (pn_dlg->shell), action_items, 3, 0);
gtk_widget_show (pn_dlg->shell);
}
static void
new_named_buffer_callback (GtkWidget *w,
gpointer client_data,
gpointer call_data)
{
PixelRegion srcPR, destPR;
TileManager *tiles;
NamedBuffer *nb;
tiles = (TileManager *) client_data;
nb = (NamedBuffer *) g_malloc (sizeof (NamedBuffer));
nb->buf = tile_manager_new (tiles->levels[0].width, tiles->levels[0].height, tiles->levels[0].bpp);
pixel_region_init (&srcPR, tiles, 0, 0, tiles->levels[0].width, tiles->levels[0].height, FALSE);
pixel_region_init (&destPR, nb->buf, 0, 0, tiles->levels[0].width, tiles->levels[0].height, TRUE);
copy_region (&srcPR, &destPR);
nb->name = g_strdup ((char *) call_data);
named_buffers = append_to_list (named_buffers, (void *) nb);
}
static void
new_named_buffer (TileManager *new_tiles)
{
/* Create the dialog box to ask for a name */
query_string_box ("Named Buffer", "Enter a name for this buffer", NULL,
new_named_buffer_callback, new_tiles);
}
int
named_edit_cut (void *gdisp_ptr)
{
TileManager *new_tiles;
GDisplay *gdisp;
/* stop any active tool */
gdisp = (GDisplay *) gdisp_ptr;
active_tool_control (HALT, gdisp_ptr);
new_tiles = edit_cut (gdisp->gimage, gimage_active_drawable (gdisp->gimage));
if (! new_tiles)
return FALSE;
else
{
new_named_buffer (new_tiles);
gdisplays_flush ();
return TRUE;
}
}
int
named_edit_copy (void *gdisp_ptr)
{
TileManager *new_tiles;
GDisplay *gdisp;
gdisp = (GDisplay *) gdisp_ptr;
new_tiles = edit_copy (gdisp->gimage, gimage_active_drawable (gdisp->gimage));
if (! new_tiles)
return FALSE;
else
{
new_named_buffer (new_tiles);
return TRUE;
}
}
int
named_edit_paste (void *gdisp_ptr)
{
paste_named_buffer ((GDisplay *) gdisp_ptr);
gdisplays_flush();
return TRUE;
}
void
named_buffers_free ()
{
link_ptr list;
NamedBuffer * nb;
list = named_buffers;
while (list)
{
nb = (NamedBuffer *) list->data;
tile_manager_destroy (nb->buf);
g_free (nb->name);
g_free (nb);
list = next_item (list);
}
free_list (named_buffers);
named_buffers = NULL;
}
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