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gimp/app/undo.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "appenv.h"
#include "by_color_select.h"
#include "channel.h"
#include "drawable.h"
#include "errors.h"
#include "floating_sel.h"
#include "gdisplay.h"
#include "gdisplay_ops.h"
#include "gimage_mask.h"
#include "gimprc.h"
#include "layer.h"
#include "paint_core.h"
#include "paint_funcs.h"
#include "parasitelist.h"
#include "tools.h"
#include "transform_core.h"
#include "undo.h"
#include "drawable_pvt.h"
#include "layer_pvt.h"
#include "channel_pvt.h"
#include "tile_manager_pvt.h"
#include "tile.h" /* ick. */
#include "libgimp/parasite.h"
#include "libgimp/gimpintl.h"
#include "gimpparasite.h"
/*#define DEBUG*/
#ifdef DEBUG
#define TRC(x) printf x
#else
#define TRC(x)
#endif
typedef enum {
UNDO = 0,
REDO = 1
} UndoState;
typedef int (* UndoPopFunc) (GImage *, UndoState, UndoType, void *);
typedef void (* UndoFreeFunc) (UndoState, UndoType, void *);
typedef struct _undo Undo;
struct _undo
{
UndoType type; /* undo type */
void * data; /* data to implement the undo, NULL for group */
long bytes; /* size of undo item */
gboolean dirties_image; /* TRUE if undo mutates image */
gboolean group_boundary; /* TRUE if this is the start/end of a group */
UndoPopFunc pop_func; /* function pointer to undo pop proc */
UndoFreeFunc free_func; /* function with specifics for freeing */
};
/* Pop functions */
static int undo_pop_image (GImage *, UndoState, UndoType, void *);
static int undo_pop_mask (GImage *, UndoState, UndoType, void *);
static int undo_pop_layer_displace (GImage *, UndoState, UndoType, void *);
static int undo_pop_transform (GImage *, UndoState, UndoType, void *);
static int undo_pop_paint (GImage *, UndoState, UndoType, void *);
static int undo_pop_layer (GImage *, UndoState, UndoType, void *);
static int undo_pop_layer_mod (GImage *, UndoState, UndoType, void *);
static int undo_pop_layer_mask (GImage *, UndoState, UndoType, void *);
static int undo_pop_channel (GImage *, UndoState, UndoType, void *);
static int undo_pop_channel_mod (GImage *, UndoState, UndoType, void *);
static int undo_pop_fs_to_layer (GImage *, UndoState, UndoType, void *);
static int undo_pop_fs_rigor (GImage *, UndoState, UndoType, void *);
static int undo_pop_fs_relax (GImage *, UndoState, UndoType, void *);
static int undo_pop_gimage_mod (GImage *, UndoState, UndoType, void *);
static int undo_pop_guide (GImage *, UndoState, UndoType, void *);
static int undo_pop_parasite (GImage *, UndoState, UndoType, void *);
static int undo_pop_qmask (GImage *, UndoState, UndoType, void *);
static int undo_pop_resolution (GImage *, UndoState, UndoType, void *);
static int undo_pop_layer_rename (GImage *, UndoState, UndoType, void *);
static int undo_pop_layer_reposition (GImage *, UndoState, UndoType, void *);
static int undo_pop_cantundo (GImage *, UndoState, UndoType, void *);
/* Free functions */
static void undo_free_image (UndoState, UndoType, void *);
static void undo_free_mask (UndoState, UndoType, void *);
static void undo_free_layer_displace (UndoState, UndoType, void *);
static void undo_free_transform (UndoState, UndoType, void *);
static void undo_free_paint (UndoState, UndoType, void *);
static void undo_free_layer (UndoState, UndoType, void *);
static void undo_free_layer_mod (UndoState, UndoType, void *);
static void undo_free_layer_mask (UndoState, UndoType, void *);
static void undo_free_channel (UndoState, UndoType, void *);
static void undo_free_channel_mod (UndoState, UndoType, void *);
static void undo_free_fs_to_layer (UndoState, UndoType, void *);
static void undo_free_fs_rigor (UndoState, UndoType, void *);
static void undo_free_fs_relax (UndoState, UndoType, void *);
static void undo_free_gimage_mod (UndoState, UndoType, void *);
static void undo_free_guide (UndoState, UndoType, void *);
static void undo_free_parasite (UndoState, UndoType, void *);
static void undo_free_qmask (UndoState, UndoType, void *);
static void undo_free_resolution (UndoState, UndoType, void *);
static void undo_free_layer_rename (UndoState, UndoType, void *);
static void undo_free_layer_reposition(UndoState, UndoType, void *);
static void undo_free_cantundo (UndoState, UndoType, void *);
/* Sizing functions */
static int layer_size (Layer *);
static int channel_size (Channel *);
static const char * undo_type_to_name (UndoType);
static Undo * undo_new (UndoType, long, gboolean);
static int shrink_wrap = FALSE;
static int
layer_size (Layer *layer)
{
int size;
size = sizeof (Layer) +
GIMP_DRAWABLE(layer)->width * GIMP_DRAWABLE(layer)->height * GIMP_DRAWABLE(layer)->bytes +
strlen (GIMP_DRAWABLE(layer)->name);
if (layer_get_mask (layer))
size += channel_size (GIMP_CHANNEL (layer_get_mask (layer)));
return size;
}
static int
channel_size (Channel *channel)
{
int size;
size = sizeof (Channel) + GIMP_DRAWABLE(channel)->width * GIMP_DRAWABLE(channel)->height +
strlen (GIMP_DRAWABLE(channel)->name);
return size;
}
static void
undo_free_list (GImage *gimage,
UndoState state,
GSList *list)
{
GSList * orig;
Undo * undo;
orig = list;
while (list)
{
undo = (Undo *) list->data;
if (undo)
{
if (undo->free_func)
(*undo->free_func) (state, undo->type, undo->data);
gimage->undo_bytes -= undo->bytes;
g_free (undo);
}
list = g_slist_next (list);
}
g_slist_free (orig);
}
static GSList *
remove_stack_bottom (GImage *gimage)
{
GSList *list;
GSList *last;
Undo *object;
int in_group = 0;
list = gimage->undo_stack;
last = NULL;
while (list)
{
if (list->next == NULL)
{
if (last)
undo_free_list (gimage, UNDO, last->next);
else
undo_free_list (gimage, UNDO, list);
gimage->undo_levels --;
if (last)
last->next = NULL;
list = NULL;
gimp_image_undo_event (gimage, UNDO_EXPIRED);
}
else
{
object = (Undo *) list->data;
if (object->group_boundary)
in_group = (in_group) ? 0 : 1;
/* Make sure last points to only a single item, or the
* tail of an aggregate undo item
*/
if (!in_group)
last = list;
list = g_slist_next (list);
}
}
if (last)
return gimage->undo_stack;
else
return NULL;
}
/* Allocate and initialise a new Undo. Leaves data and function
* pointers zeroed ready to be filled in by caller. */
static Undo *
undo_new (UndoType type,
long size,
gboolean dirties_image)
{
Undo *new;
new = g_new0 (Undo, 1);
new->type = type;
new->bytes = size;
new->dirties_image = dirties_image;
return new;
}
static int
undo_free_up_space (GImage *gimage)
{
/* If there are 0 levels of undo return FALSE. */
if (levels_of_undo == 0)
return FALSE;
/* Delete the item on the bottom of the stack if we have the maximum
* levels of undo already
*/
while (gimage->undo_levels >= levels_of_undo)
gimage->undo_stack = remove_stack_bottom (gimage);
return TRUE;
}
static Undo *
undo_push (GImage *gimage,
long size,
UndoType type,
gboolean dirties_image)
{
Undo * new;
/* Does this undo dirty the image? If so, we always want to mark
* image dirty, even if we can't actually push the undo. */
if (dirties_image)
gimp_image_dirty (gimage);
if (! gimage->undo_on)
return NULL;
size += sizeof (Undo);
if (gimage->redo_stack)
{
undo_free_list (gimage, REDO, gimage->redo_stack);
gimage->redo_stack = NULL;
/* If the image was dirty, but could become clean by redo-ing
* some actions, then it should now become 'infinitely' dirty.
* This is because we've just nuked the actions that would allow
* the image to become clean again. The only hope for salvation
* is to save the image now! -- austin */
if (gimage->dirty < 0)
gimage->dirty = 10000;
}
if (gimage->pushing_undo_group == UNDO_NULL)
if (! undo_free_up_space (gimage))
return NULL;
new = undo_new (type, size, dirties_image);
gimage->undo_bytes += size;
/* only increment levels if not in a group */
if (gimage->pushing_undo_group == UNDO_NULL)
gimage->undo_levels ++;
gimage->undo_stack = g_slist_prepend (gimage->undo_stack, (void *) new);
TRC (("undo_push: %s\n", undo_type_to_name (type)));
/* lastly, tell people about the newly pushed undo (must come after
* modification of undo_stack). */
if (gimage->pushing_undo_group == UNDO_NULL)
gimp_image_undo_event (gimage, UNDO_PUSHED);
return new;
}
static int
pop_stack (GImage *gimage,
GSList **stack_ptr,
GSList **unstack_ptr,
UndoState state)
{
Undo * object;
GSList *stack;
GSList *tmp;
int status = 0;
int in_group = 0;
int x, y;
GDisplay *gdisp;
/* Keep popping until we pop a valid object
* or get to the end of a group if we're in one
*/
while (*stack_ptr)
{
stack = *stack_ptr;
object = (Undo *) stack->data;
if (object->group_boundary)
{
in_group = (in_group) ? 0 : 1;
if (in_group)
gimage->undo_levels += (state == UNDO) ? -1 : 1;
if (status && !in_group)
status = 1;
else
status = 0;
}
else
{
TRC (("undo_pop: %s\n", undo_type_to_name (object->type)));
status = (* object->pop_func) (gimage, state, object->type,
object->data);
if (object->dirties_image)
{
switch (state) {
case UNDO:
gimp_image_clean (gimage);
break;
case REDO:
gimp_image_dirty (gimage);
break;
}
}
if (!in_group)
gimage->undo_levels += (state == UNDO) ? -1 : 1;
}
*unstack_ptr = g_slist_prepend (*unstack_ptr, (void *) object);
tmp = stack;
*stack_ptr = g_slist_next (*stack_ptr);
tmp->next = NULL;
g_slist_free (tmp);
if (status && !in_group)
{
/* Flush any image updates and displays */
gdisp = gdisplay_active();
if (gdisp != NULL) {
if (gdisp->disp_xoffset || gdisp->disp_yoffset)
{
gdk_window_get_size (gdisp->canvas->window, &x, &y);
if (gdisp->disp_yoffset)
{
gdisplay_expose_area (gdisp, 0, 0, gdisp->disp_width,
gdisp->disp_yoffset);
gdisplay_expose_area (gdisp, 0, gdisp->disp_yoffset + y,
gdisp->disp_width, gdisp->disp_height);
}
if (gdisp->disp_xoffset)
{
gdisplay_expose_area (gdisp, 0, 0, gdisp->disp_xoffset,
gdisp->disp_height);
gdisplay_expose_area (gdisp, gdisp->disp_xoffset + x, 0,
gdisp->disp_width, gdisp->disp_height);
}
}
}
gdisplays_flush ();
/* If the shrink_wrap flag was set */
if (shrink_wrap)
{
gdisplays_shrink_wrap (gimage);
shrink_wrap = FALSE;
}
/* let others know that we just popped an action */
gimp_image_undo_event (gimage,
(state == UNDO)? UNDO_POPPED : UNDO_REDO);
return TRUE;
}
}
return FALSE;
}
int
undo_pop (GImage *gimage)
{
/* Very bad idea to pop an action off the undo stack if we're in the
* middle of a group, since the whole group won't be popped. Might
* leave unbalanced group start marker earlier in the stack too,
* causing much confusion when it's later reached and
* mis-interpreted as a group start. */
g_return_val_if_fail (gimage->pushing_undo_group == UNDO_NULL, FALSE);
return pop_stack (gimage, &gimage->undo_stack, &gimage->redo_stack, UNDO);
}
int
undo_redo (GImage *gimage)
{
/* ditto for redo stack */
g_return_val_if_fail (gimage->pushing_undo_group == UNDO_NULL, FALSE);
return pop_stack (gimage, &gimage->redo_stack, &gimage->undo_stack, REDO);
}
/* Return the name of the action that would be used if undo_pop or
* undo_redo is called, or NULL if there are no actions pushed on the
* stack. */
static const char *
undo_get_topitem_name (GSList *stack)
{
Undo *object;
if (!stack)
return NULL;
object = stack->data;
/* For group boundaries, the type of the boundary marker is the
* type of the whole group (but each individual action in the
* group retains its own type so layer/channel unrefs work
* correctly). */
return undo_type_to_name (object->type);
}
/* Return the type of the top undo action */
static UndoType
undo_get_topitem_type (GSList *stack)
{
Undo *object;
if (!stack)
return UNDO_NULL;
object = stack->data;
/* For group boundaries, the type of the boundary marker is the
* type of the whole group (but each individual action in the
* group retains its own type so layer/channel unrefs work
* correctly). */
return object->type;
}
const char *
undo_get_undo_name (GImage *gimage)
{
g_return_val_if_fail (gimage != NULL, NULL);
/* don't want to encourage undo while a group is open */
if (gimage->pushing_undo_group != UNDO_NULL)
return NULL;
return undo_get_topitem_name (gimage->undo_stack);
}
UndoType
undo_get_undo_top_type (GImage *gimage)
{
g_return_val_if_fail (gimage != NULL, UNDO_NULL);
/* don't want to encourage undo while a group is open */
if (gimage->pushing_undo_group != UNDO_NULL)
return UNDO_NULL;
return undo_get_topitem_type (gimage->undo_stack);
}
const char *
undo_get_redo_name (GImage *gimage)
{
g_return_val_if_fail (gimage != NULL, NULL);
/* don't want to encourage redo while a group is open */
if (gimage->pushing_undo_group != UNDO_NULL)
return NULL;
return undo_get_topitem_name (gimage->redo_stack);
}
static void
undo_map_over_stack (GSList *stack,
undo_map_fn fn,
void *data)
{
int in_group = 0;
int count = 0;
Undo *object;
while (stack)
{
object = (Undo *) stack->data;
if (object->group_boundary)
in_group = !in_group;
/* Keep track of group length. 0 means not in group (or group
* end marker), 1 is group start marker, >= 2 are group
* members. */
if (in_group)
count++;
else
count = 0;
/* Is this a group end marker or non-grouped action? */
if (count == 0)
{
if (fn (undo_type_to_name (object->type), data))
return; /* early termination option exercised */
}
stack = g_slist_next (stack);
}
}
void
undo_map_over_undo_stack (GImage *gimage,
undo_map_fn fn,
void *data)
{
/* shouldn't have group open */
g_return_if_fail (gimage->pushing_undo_group == UNDO_NULL);
undo_map_over_stack (gimage->undo_stack, fn, data);
}
void
undo_map_over_redo_stack (GImage *gimage,
undo_map_fn fn,
void *data)
{
/* shouldn't have group open */
g_return_if_fail (gimage->pushing_undo_group == UNDO_NULL);
undo_map_over_stack (gimage->redo_stack, fn, data);
}
void
undo_free (GImage *gimage)
{
undo_free_list (gimage, UNDO, gimage->undo_stack);
undo_free_list (gimage, REDO, gimage->redo_stack);
gimage->undo_stack = NULL;
gimage->redo_stack = NULL;
gimage->undo_bytes = 0;
gimage->undo_levels = 0;
/* If the image was dirty, but could become clean by redo-ing
* some actions, then it should now become 'infinitely' dirty.
* This is because we've just nuked the actions that would allow
* the image to become clean again. The only hope for salvation
* is to save the image now! -- austin */
if (gimage->dirty < 0)
gimage->dirty = 10000;
/* The same applies to the case where the image would become clean
* due to undo actions, but since user can't undo without an undo
* stack, that's not so much a problem. */
gimp_image_undo_event (gimage, UNDO_FREE);
}
/**********************/
/* group Undo funcs */
int
undo_push_group_start (GImage *gimage,
UndoType type)
{
Undo *boundary_marker;
if (! gimage->undo_on)
return FALSE;
/* Bad idea to push 0 as the group type, since that won't
* be recognized as the start of the group later. */
g_return_val_if_fail (type != 0, FALSE);
gimage->group_count ++;
TRC (("group_start (%s)\n", undo_type_to_name (type)));
/* If we're already in a group...ignore */
if (gimage->group_count > 1)
return TRUE;
if (gimage->redo_stack)
{
undo_free_list (gimage, REDO, gimage->redo_stack);
gimage->redo_stack = NULL;
/* If the image was dirty, but could become clean by redo-ing
* some actions, then it should now become 'infinitely' dirty.
* This is because we've just nuked the actions that would allow
* the image to become clean again. The only hope for salvation
* is to save the image now! -- austin */
if (gimage->dirty < 0)
gimage->dirty = 10000;
}
if (! undo_free_up_space (gimage))
return FALSE;
boundary_marker = undo_new (type, sizeof (Undo), FALSE);
gimage->undo_bytes += boundary_marker->bytes;
boundary_marker->group_boundary = TRUE;
gimage->pushing_undo_group = type;
gimage->undo_stack = g_slist_prepend (gimage->undo_stack, boundary_marker);
gimage->undo_levels++;
return TRUE;
}
int
undo_push_group_end (GImage *gimage)
{
Undo *boundary_marker;
if (! gimage->undo_on)
return FALSE;
gimage->group_count --;
TRC (("group end\n"));
if (gimage->group_count == 0)
{
boundary_marker = undo_new (gimage->pushing_undo_group,
sizeof (Undo), FALSE);
boundary_marker->group_boundary = TRUE;
gimage->undo_stack = g_slist_prepend (gimage->undo_stack,
boundary_marker);
gimage->undo_bytes += boundary_marker->bytes;
gimage->pushing_undo_group = UNDO_NULL;
/* Do it here, since undo_push doesn't emit this event while in the
* middle of a group */
gimp_image_undo_event (gimage, UNDO_PUSHED);
}
return TRUE;
}
/*********************************/
/* Image Undo functions */
typedef struct _image_undo ImageUndo;
struct _image_undo
{
TileManager *tiles;
GimpDrawable *drawable;
int x1, y1, x2, y2;
int sparse;
};
int
undo_push_image (GImage *gimage,
GimpDrawable *drawable,
int x1,
int y1,
int x2,
int y2)
{
long size;
Undo *new;
ImageUndo *image_undo;
TileManager *tiles;
PixelRegion srcPR, destPR;
x1 = BOUNDS (x1, 0, drawable_width (drawable));
y1 = BOUNDS (y1, 0, drawable_height (drawable));
x2 = BOUNDS (x2, 0, drawable_width (drawable));
y2 = BOUNDS (y2, 0, drawable_height (drawable));
size = (x2 - x1) * (y2 - y1) * drawable_bytes (drawable) + sizeof (void *) * 2;
if ((new = undo_push (gimage, size, IMAGE_UNDO, TRUE)))
{
image_undo = (ImageUndo *) g_malloc (sizeof (ImageUndo));
/* If we cannot create a new temp buf--either because our parameters are
* degenerate or something else failed, simply return an unsuccessful push.
*/
tiles = tile_manager_new ((x2 - x1), (y2 - y1), drawable_bytes (drawable));
pixel_region_init (&srcPR, drawable_data (drawable), x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, tiles, 0, 0, (x2 - x1), (y2 - y1), TRUE);
copy_region (&srcPR, &destPR);
/* set the image undo structure */
image_undo->tiles = tiles;
image_undo->drawable = drawable;
image_undo->x1 = x1;
image_undo->y1 = y1;
image_undo->x2 = x2;
image_undo->y2 = y2;
image_undo->sparse = FALSE;
new->data = image_undo;
new->pop_func = undo_pop_image;
new->free_func = undo_free_image;
return TRUE;
}
else
return FALSE;
}
int
undo_push_image_mod (GImage *gimage,
GimpDrawable *drawable,
int x1,
int y1,
int x2,
int y2,
void *tiles_ptr,
int sparse)
{
long size;
int dwidth, dheight;
Undo * new;
ImageUndo *image_undo;
TileManager *tiles;
if (! tiles_ptr)
return FALSE;
dwidth = drawable_width (drawable);
dheight = drawable_height (drawable);
x1 = BOUNDS (x1, 0, dwidth);
y1 = BOUNDS (y1, 0, dheight);
x2 = BOUNDS (x2, 0, dwidth);
y2 = BOUNDS (y2, 0, dheight);
tiles = (TileManager *) tiles_ptr;
size = tiles->width * tiles->height *
tiles->bpp + sizeof (void *) * 2;
if ((new = undo_push (gimage, size, IMAGE_MOD_UNDO, TRUE)))
{
image_undo = (ImageUndo *) g_malloc (sizeof (ImageUndo));
image_undo->tiles = tiles;
image_undo->drawable = drawable;
image_undo->x1 = x1;
image_undo->y1 = y1;
image_undo->x2 = x2;
image_undo->y2 = y2;
image_undo->sparse = sparse;
new->data = image_undo;
new->pop_func = undo_pop_image;
new->free_func = undo_free_image;
return TRUE;
}
else
{
tile_manager_destroy (tiles);
return FALSE;
}
}
static int
undo_pop_image (GImage *gimage,
UndoState state,
UndoType type,
void *image_undo_ptr)
{
ImageUndo *image_undo;
TileManager *tiles;
PixelRegion PR1, PR2;
int x, y;
int w, h;
image_undo = (ImageUndo *) image_undo_ptr;
tiles = image_undo->tiles;
/* some useful values */
x = image_undo->x1;
y = image_undo->y1;
if (image_undo->sparse == FALSE)
{
w = tiles->width;
h = tiles->height;
pixel_region_init (&PR1, tiles, 0, 0, w, h, TRUE);
pixel_region_init (&PR2, drawable_data (image_undo->drawable), x, y, w, h, TRUE);
/* swap the regions */
swap_region (&PR1, &PR2);
}
else
{
int i, j;
Tile *src_tile;
Tile *dest_tile;
w = image_undo->x2 - image_undo->x1;
h = image_undo->y2 - image_undo->y1;
for (i = y; i < image_undo->y2; i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < image_undo->x2; j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
src_tile = tile_manager_get_tile (tiles, j, i, FALSE, FALSE);
if (tile_is_valid (src_tile) == TRUE)
{
/* swap tiles, not pixels! */
src_tile = tile_manager_get_tile (tiles, j, i, TRUE, FALSE /* TRUE */);
dest_tile = tile_manager_get_tile (drawable_data (image_undo->drawable), j, i, TRUE, FALSE /* TRUE */);
tile_manager_map_tile (tiles, j, i, dest_tile);
tile_manager_map_tile (drawable_data (image_undo->drawable), j, i, src_tile);
#if 0
swap_pixels (tile_data_pointer (src_tile, 0, 0),
tile_data_pointer (dest_tile, 0, 0),
tile_size (src_tile));
#endif
tile_release (dest_tile, FALSE /* TRUE */);
tile_release (src_tile, FALSE /* TRUE */);
}
}
}
}
drawable_update (image_undo->drawable, x, y, w, h);
return TRUE;
}
static void
undo_free_image (UndoState state,
UndoType type,
void *image_undo_ptr)
{
ImageUndo *image_undo;
image_undo = (ImageUndo *) image_undo_ptr;
tile_manager_destroy (image_undo->tiles);
g_free (image_undo);
}
/******************************/
/* Mask Undo functions */
int
undo_push_mask (GImage *gimage,
void *mask_ptr)
{
Undo *new;
MaskUndo *mask_undo;
int size;
mask_undo = (MaskUndo *) mask_ptr;
if (mask_undo->tiles)
size = mask_undo->tiles->width * mask_undo->tiles->height;
else
size = 0;
if ((new = undo_push (gimage, size, MASK_UNDO, FALSE)))
{
new->data = mask_undo;
new->pop_func = undo_pop_mask;
new->free_func = undo_free_mask;
return TRUE;
}
else
{
if (mask_undo->tiles)
tile_manager_destroy (mask_undo->tiles);
g_free (mask_undo);
return FALSE;
}
}
static int
undo_pop_mask (GImage *gimage,
UndoState state,
UndoType type,
void *mask_ptr)
{
MaskUndo *mask_undo;
TileManager *new_tiles;
Channel *sel_mask;
PixelRegion srcPR, destPR;
int selection;
int x1, y1, x2, y2;
int width, height;
unsigned char empty = 0;
width = height = 0;
mask_undo = (MaskUndo *) mask_ptr;
/* save current selection mask */
sel_mask = gimage_get_mask (gimage);
selection = channel_bounds (sel_mask, &x1, &y1, &x2, &y2);
pixel_region_init (&srcPR, GIMP_DRAWABLE(sel_mask)->tiles, x1, y1, (x2 - x1), (y2 - y1), FALSE);
if (selection)
{
new_tiles = tile_manager_new (srcPR.w, srcPR.h, 1);
pixel_region_init (&destPR, new_tiles, 0, 0, srcPR.w, srcPR.h, TRUE);
copy_region (&srcPR, &destPR);
pixel_region_init (&srcPR, GIMP_DRAWABLE(sel_mask)->tiles, x1, y1, (x2 - x1), (y2 - y1), TRUE);
color_region (&srcPR, &empty);
}
else
new_tiles = NULL;
if (mask_undo->tiles)
{
width = mask_undo->tiles->width;
height = mask_undo->tiles->height;
pixel_region_init (&srcPR, mask_undo->tiles, 0, 0, width, height, FALSE);
pixel_region_init (&destPR, GIMP_DRAWABLE(sel_mask)->tiles, mask_undo->x, mask_undo->y, width, height, TRUE);
copy_region (&srcPR, &destPR);
tile_manager_destroy (mask_undo->tiles);
}
/* invalidate the current bounds and boundary of the mask */
gimage_mask_invalidate (gimage);
if (mask_undo->tiles)
{
sel_mask->empty = FALSE;
sel_mask->x1 = mask_undo->x;
sel_mask->y1 = mask_undo->y;
sel_mask->x2 = mask_undo->x + width;
sel_mask->y2 = mask_undo->y + height;
}
else
{
sel_mask->empty = TRUE;
sel_mask->x1 = 0;
sel_mask->y1 = 0;
sel_mask->x2 = GIMP_DRAWABLE(sel_mask)->width;
sel_mask->y2 = GIMP_DRAWABLE(sel_mask)->height;
}
/* set the new mask undo parameters */
mask_undo->tiles = new_tiles;
mask_undo->x = x1;
mask_undo->y = y1;
/* we know the bounds */
sel_mask->bounds_known = TRUE;
/* if there is a "by color" selection dialog active
* for this gimage's mask, send it an update notice
*/
if (gimage->by_color_select)
by_color_select_initialize_by_image (gimage);
return TRUE;
}
static void
undo_free_mask (UndoState state,
UndoType type,
void *mask_ptr)
{
MaskUndo *mask_undo;
mask_undo = (MaskUndo *) mask_ptr;
if (mask_undo->tiles)
tile_manager_destroy (mask_undo->tiles);
g_free (mask_undo);
}
/***************************************/
/* Layer displacement Undo functions */
typedef struct _layer_display_undo LayerDisplaceUndo;
struct _layer_display_undo
{
int info[3];
void * path_undo;
};
int
undo_push_layer_displace (GImage *gimage,
GimpLayer *layer)
{
Undo * new;
LayerDisplaceUndo * ldu;
if ((new = undo_push (gimage, 12, LAYER_DISPLACE_UNDO, TRUE)))
{
new->data = (void *) g_malloc (sizeof(LayerDisplaceUndo));
new->pop_func = undo_pop_layer_displace;
new->free_func = undo_free_layer_displace;
ldu = (LayerDisplaceUndo *) new->data;
ldu->info[0] = drawable_ID(GIMP_DRAWABLE(layer));
ldu->info[1] = GIMP_DRAWABLE(layer)->offset_x;
ldu->info[2] = GIMP_DRAWABLE(layer)->offset_y;
ldu->path_undo = paths_transform_start_undo(gimage);
return TRUE;
}
else
return FALSE;
}
static int
undo_pop_layer_displace (GImage *gimage,
UndoState state,
UndoType type,
void *info_ptr)
{
Layer * layer;
int old_offsets[2];
LayerDisplaceUndo * ldu;
ldu = (LayerDisplaceUndo *) info_ptr;
layer = layer_get_ID (ldu->info[0]);
if (layer)
{
old_offsets[0] = GIMP_DRAWABLE(layer)->offset_x;
old_offsets[1] = GIMP_DRAWABLE(layer)->offset_y;
drawable_update (GIMP_DRAWABLE(layer), 0, 0,
GIMP_DRAWABLE(layer)->width,
GIMP_DRAWABLE(layer)->height);
GIMP_DRAWABLE(layer)->offset_x = ldu->info[1];
GIMP_DRAWABLE(layer)->offset_y = ldu->info[2];
drawable_update (GIMP_DRAWABLE(layer), 0, 0,
GIMP_DRAWABLE(layer)->width,
GIMP_DRAWABLE(layer)->height);
if (layer->mask)
{
GIMP_DRAWABLE(layer->mask)->offset_x = ldu->info[1];
GIMP_DRAWABLE(layer->mask)->offset_y = ldu->info[2];
drawable_update (GIMP_DRAWABLE(layer->mask), 0, 0,
GIMP_DRAWABLE(layer->mask)->width,
GIMP_DRAWABLE(layer->mask)->height);
}
/* invalidate the selection boundary because of a layer modification */
layer_invalidate_boundary (layer);
ldu->info[1] = old_offsets[0];
ldu->info[2] = old_offsets[1];
/* Now undo paths bits */
if(ldu->path_undo)
paths_transform_do_undo(gimage,ldu->path_undo);
return TRUE;
}
else
return FALSE;
}
static void
undo_free_layer_displace (UndoState state,
UndoType type,
void *info_ptr)
{
LayerDisplaceUndo * ldu;
ldu = (LayerDisplaceUndo *) info_ptr;
/* Free mem held for paths undo stuff */
if(ldu->path_undo)
paths_transform_free_undo(ldu->path_undo);
g_free (info_ptr);
}
/*********************************/
/* Transform Undo */
int
undo_push_transform (GImage *gimage,
void *tu_ptr)
{
Undo * new;
int size;
size = sizeof (TransformUndo);
if ((new = undo_push (gimage, size, TRANSFORM_UNDO, FALSE)))
{
new->data = tu_ptr;
new->pop_func = undo_pop_transform;
new->free_func = undo_free_transform;
return TRUE;
}
else
{
g_free (tu_ptr);
return FALSE;
}
}
static int
undo_pop_transform (GImage *gimage,
UndoState state,
UndoType type,
void *tu_ptr)
{
TransformCore * tc;
TransformUndo * tu;
TileManager * temp;
double d;
int i;
/* Can't have ANY tool selected - maybe a plugin running */
if (active_tool == NULL)
return TRUE;
tc = (TransformCore *) active_tool->private;
tu = (TransformUndo *) tu_ptr;
paths_transform_do_undo(gimage,tu->path_undo);
/* only pop if the active tool is the tool that pushed this undo */
if (tu->tool_ID != active_tool->ID)
return TRUE;
/* swap the transformation information arrays */
for (i = 0; i < TRAN_INFO_SIZE; i++)
{
d = tu->trans_info[i];
tu->trans_info[i] = tc->trans_info[i];
tc->trans_info[i] = d;
}
/* swap the original buffer--the source buffer for repeated transforms
*/
temp = tu->original;
tu->original = tc->original;
tc->original = temp;
/* If we're re-implementing the first transform, reactivate tool */
if (state == REDO && tc->original)
{
active_tool->state = ACTIVE;
draw_core_resume (tc->core, active_tool);
}
return TRUE;
}
static void
undo_free_transform (UndoState state,
UndoType type,
void *tu_ptr)
{
TransformUndo * tu;
tu = (TransformUndo *) tu_ptr;
if (tu->original)
tile_manager_destroy (tu->original);
paths_transform_free_undo(tu->path_undo);
g_free (tu);
}
/*********************************/
/* Paint Undo */
int
undo_push_paint (GImage *gimage,
void *pu_ptr)
{
Undo * new;
int size;
size = sizeof (PaintUndo);
if ((new = undo_push (gimage, size, PAINT_UNDO, FALSE)))
{
new->data = pu_ptr;
new->pop_func = undo_pop_paint;
new->free_func = undo_free_paint;
return TRUE;
}
else
{
g_free (pu_ptr);
return FALSE;
}
}
static int
undo_pop_paint (GImage *gimage,
UndoState state,
UndoType type,
void *pu_ptr)
{
PaintCore * pc;
PaintUndo * pu;
double tmp;
/* Can't have ANY tool selected - maybe a plugin running */
if (active_tool == NULL)
return TRUE;
pc = (PaintCore *) active_tool->private;
pu = (PaintUndo *) pu_ptr;
/* only pop if the active tool is the tool that pushed this undo */
if (pu->tool_ID != active_tool->ID)
return TRUE;
/* swap the paint core information */
tmp = pc->lastx;
pc->lastx = pu->lastx;
pu->lastx = tmp;
tmp = pc->lasty;
pc->lasty = pu->lasty;
pu->lasty = tmp;
tmp = pc->lastpressure;
pc->lastpressure = pu->lastpressure;
pu->lastpressure = tmp;
tmp = pc->lastxtilt;
pc->lastxtilt = pu->lastxtilt;
pu->lastxtilt = tmp;
tmp = pc->lastytilt;
pc->lastytilt = pu->lastytilt;
pu->lastytilt = tmp;
return TRUE;
}
static void
undo_free_paint (UndoState state,
UndoType type,
void *pu_ptr)
{
PaintUndo * pu;
pu = (PaintUndo *) pu_ptr;
g_free (pu);
}
/*********************************/
/* New Layer Undo */
int
undo_push_layer (GImage *gimage,
UndoType type,
void *lu_ptr)
{
LayerUndo *lu;
Undo *new;
int size;
lu = (LayerUndo *) lu_ptr;
g_return_val_if_fail (type == LAYER_ADD_UNDO ||
type == LAYER_REMOVE_UNDO,
FALSE);
size = layer_size (lu->layer) + sizeof (LayerUndo);
if ((new = undo_push (gimage, size, type, TRUE)))
{
new->data = lu_ptr;
new->pop_func = undo_pop_layer;
new->free_func = undo_free_layer;
return TRUE;
}
else
{
/* if this is a remove layer, delete the layer */
if (type == LAYER_REMOVE_UNDO)
layer_unref (lu->layer);
g_free (lu);
return FALSE;
}
}
static int
undo_pop_layer (GImage *gimage,
UndoState state,
UndoType type,
void *lu_ptr)
{
LayerUndo *lu;
lu = (LayerUndo *) lu_ptr;
/* remove layer */
if ((state == UNDO && type == LAYER_ADD_UNDO) ||
(state == REDO && type == LAYER_REMOVE_UNDO))
{
/* record the current position */
lu->prev_position = gimage_get_layer_index (gimage, lu->layer);
/* set the previous layer */
gimage_set_active_layer (gimage, lu->prev_layer);
/* remove the layer */
gimage->layers = g_slist_remove (gimage->layers, lu->layer);
gimage->layer_stack = g_slist_remove (gimage->layer_stack, lu->layer);
/* reset the gimage values */
if (layer_is_floating_sel (lu->layer))
{
gimage->floating_sel = NULL;
/* reset the old drawable */
floating_sel_reset (lu->layer);
}
drawable_update (GIMP_DRAWABLE(lu->layer), 0, 0,
GIMP_DRAWABLE(lu->layer)->width,
GIMP_DRAWABLE(lu->layer)->height);
}
/* restore layer */
else
{
/* record the active layer */
lu->prev_layer = gimage->active_layer;
/* hide the current selection--for all views */
if (gimage->active_layer != NULL)
layer_invalidate_boundary ((gimage->active_layer));
/* if this is a floating selection, set the fs pointer */
if (layer_is_floating_sel (lu->layer))
gimage->floating_sel = lu->layer;
/* add the new layer */
gimage->layers = g_slist_insert (gimage->layers, lu->layer,
lu->prev_position);
gimage->layer_stack = g_slist_prepend (gimage->layer_stack, lu->layer);
gimage->active_layer = lu->layer;
drawable_update (GIMP_DRAWABLE(lu->layer), 0, 0,
GIMP_DRAWABLE(lu->layer)->width,
GIMP_DRAWABLE(lu->layer)->height);
}
return TRUE;
}
static void
undo_free_layer (UndoState state,
UndoType type,
void *lu_ptr)
{
LayerUndo *lu;
lu = (LayerUndo *) lu_ptr;
/* Only free the layer if we're freeing from the redo
* stack and it's a layer add, or if we're freeing from
* the undo stack and it's a layer remove
*/
if ((state == REDO && type == LAYER_ADD_UNDO) ||
(state == UNDO && type == LAYER_REMOVE_UNDO))
layer_unref (lu->layer);
g_free (lu);
}
/*********************************/
/* Layer Mod Undo */
int
undo_push_layer_mod (GImage *gimage,
void *layer_ptr)
{
Layer *layer;
Undo *new;
TileManager *tiles;
void **data;
int size;
layer = (Layer *) layer_ptr;
tiles = GIMP_DRAWABLE(layer)->tiles;
tiles->x = GIMP_DRAWABLE(layer)->offset_x;
tiles->y = GIMP_DRAWABLE(layer)->offset_y;
size = GIMP_DRAWABLE(layer)->width * GIMP_DRAWABLE(layer)->height *
GIMP_DRAWABLE(layer)->bytes + sizeof (void *) * 3;
if ((new = undo_push (gimage, size, LAYER_MOD, TRUE)))
{
data = (void **) g_malloc (sizeof (void *) * 3);
new->data = data;
new->pop_func = undo_pop_layer_mod;
new->free_func = undo_free_layer_mod;
data[0] = layer_ptr;
data[1] = (void *) tiles;
data[2] = (void *) ((long) GIMP_DRAWABLE(layer)->type);
return TRUE;
}
else
{
tile_manager_destroy (tiles);
return FALSE;
}
}
static int
undo_pop_layer_mod (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
void **data;
int layer_type;
TileManager *tiles;
TileManager *temp;
Layer *layer;
data = (void **) data_ptr;
layer = (Layer *) data[0];
tiles = (TileManager *) data[1];
/* Issue the first update */
gdisplays_update_area (gimage,
GIMP_DRAWABLE(layer)->offset_x, GIMP_DRAWABLE(layer)->offset_y,
GIMP_DRAWABLE(layer)->width, GIMP_DRAWABLE(layer)->height);
/* Create a tile manager to store the current layer contents */
temp = GIMP_DRAWABLE(layer)->tiles;
temp->x = GIMP_DRAWABLE(layer)->offset_x;
temp->y = GIMP_DRAWABLE(layer)->offset_y;
layer_type = (long) data[2];
data[2] = (void *) ((long) GIMP_DRAWABLE(layer)->type);
/* restore the layer's data */
GIMP_DRAWABLE(layer)->tiles = tiles;
GIMP_DRAWABLE(layer)->offset_x = tiles->x;
GIMP_DRAWABLE(layer)->offset_y = tiles->y;
GIMP_DRAWABLE(layer)->width = tiles->width;
GIMP_DRAWABLE(layer)->height = tiles->height;
GIMP_DRAWABLE(layer)->bytes = tiles->bpp;
GIMP_DRAWABLE(layer)->type = layer_type;
GIMP_DRAWABLE(layer)->has_alpha = TYPE_HAS_ALPHA (layer_type);
if (layer->mask)
{
GIMP_DRAWABLE(layer->mask)->offset_x = tiles->x;
GIMP_DRAWABLE(layer->mask)->offset_y = tiles->y;
}
/* If the layer type changed, update the gdisplay titles */
if (GIMP_DRAWABLE(layer)->type != (long) data[2])
gdisplays_update_title (GIMP_DRAWABLE(layer)->gimage);
/* Set the new tile manager */
data[1] = temp;
/* Issue the second update */
drawable_update (GIMP_DRAWABLE(layer), 0, 0,
GIMP_DRAWABLE(layer)->width, GIMP_DRAWABLE(layer)->height);
return TRUE;
}
static void
undo_free_layer_mod (UndoState state,
UndoType type,
void *data_ptr)
{
void ** data;
data = (void **) data_ptr;
tile_manager_destroy ((TileManager *) data[1]);
g_free (data);
}
/*********************************/
/* Layer Mask Undo */
int
undo_push_layer_mask (GImage *gimage,
UndoType type,
void *lmu_ptr)
{
LayerMaskUndo *lmu;
Undo *new;
int size;
lmu = (LayerMaskUndo *) lmu_ptr;
g_return_val_if_fail (type == LAYER_MASK_ADD_UNDO ||
type == LAYER_MASK_REMOVE_UNDO,
FALSE);
size = channel_size (GIMP_CHANNEL (lmu->mask)) + sizeof (LayerMaskUndo);
if ((new = undo_push (gimage, size, type, TRUE)))
{
new->data = lmu_ptr;
new->pop_func = undo_pop_layer_mask;
new->free_func = undo_free_layer_mask;
return TRUE;
}
else
{
if (type == LAYER_MASK_REMOVE_UNDO)
layer_mask_delete (lmu->mask);
g_free (lmu);
return FALSE;
}
}
static int
undo_pop_layer_mask (GImage *gimage,
UndoState state,
UndoType type,
void *lmu_ptr)
{
LayerMaskUndo *lmu;
lmu = (LayerMaskUndo *) lmu_ptr;
/* remove layer mask */
if ((state == UNDO && type == LAYER_MASK_ADD_UNDO) ||
(state == REDO && type == LAYER_MASK_REMOVE_UNDO))
{
/* remove the layer mask */
lmu->layer->mask = NULL;
lmu->layer->apply_mask = FALSE;
lmu->layer->edit_mask = FALSE;
lmu->layer->show_mask = FALSE;
/* if this is redoing a remove operation &
* the mode of application was DISCARD or
* this is undoing an add...
*/
if ((state == REDO && lmu->mode == DISCARD) || state == UNDO)
drawable_update (GIMP_DRAWABLE(lmu->layer), 0, 0,
GIMP_DRAWABLE(lmu->layer)->width, GIMP_DRAWABLE(lmu->layer)->height);
}
/* restore layer */
else
{
lmu->layer->mask = lmu->mask;
lmu->layer->apply_mask = lmu->apply_mask;
lmu->layer->edit_mask = lmu->edit_mask;
lmu->layer->show_mask = lmu->show_mask;
gimage_set_layer_mask_edit (gimage, lmu->layer, lmu->edit_mask);
/* if this is undoing a remove operation &
* the mode of application was DISCARD or
* this is redoing an add
*/
if ((state == UNDO && lmu->mode == DISCARD) || state == REDO)
drawable_update (GIMP_DRAWABLE(lmu->layer), 0, 0,
GIMP_DRAWABLE(lmu->layer)->width, GIMP_DRAWABLE(lmu->layer)->height);
}
return TRUE;
}
static void
undo_free_layer_mask (UndoState state,
UndoType type,
void *lmu_ptr)
{
LayerMaskUndo *lmu;
lmu = (LayerMaskUndo *) lmu_ptr;
/* Only free the layer mask if we're freeing from the redo
* stack and it's a layer add, or if we're freeing from
* the undo stack and it's a layer remove
*/
if ((state == REDO && type == LAYER_MASK_ADD_UNDO) ||
(state == UNDO && type == LAYER_MASK_REMOVE_UNDO))
layer_mask_delete (lmu->mask);
g_free (lmu);
}
/*********************************/
/* New Channel Undo */
int
undo_push_channel (GImage *gimage,
UndoType type,
void *cu_ptr)
{
ChannelUndo *cu;
Undo *new;
int size;
g_return_val_if_fail (type == CHANNEL_ADD_UNDO ||
type == CHANNEL_REMOVE_UNDO,
FALSE);
cu = (ChannelUndo *) cu_ptr;
size = channel_size (cu->channel) + sizeof (ChannelUndo);
if ((new = undo_push (gimage, size, type, TRUE)))
{
new->data = cu_ptr;
new->pop_func = undo_pop_channel;
new->free_func = undo_free_channel;
return TRUE;
}
else
{
if (type == CHANNEL_REMOVE_UNDO)
channel_delete (cu->channel);
g_free (cu);
return FALSE;
}
}
static int
undo_pop_channel (GImage *gimage,
UndoState state,
UndoType type,
void *cu_ptr)
{
ChannelUndo *cu;
cu = (ChannelUndo *) cu_ptr;
/* remove channel */
if ((state == UNDO && type == CHANNEL_ADD_UNDO) ||
(state == REDO && type == CHANNEL_REMOVE_UNDO))
{
/* record the current position */
cu->prev_position = gimage_get_channel_index (gimage, cu->channel);
/* remove the channel */
gimage->channels = g_slist_remove (gimage->channels, cu->channel);
/* set the previous channel */
gimage_set_active_channel (gimage, cu->prev_channel);
/* update the area */
drawable_update (GIMP_DRAWABLE(cu->channel), 0, 0,
GIMP_DRAWABLE(cu->channel)->width, GIMP_DRAWABLE(cu->channel)->height);
}
/* restore channel */
else
{
/* record the active channel */
cu->prev_channel = gimage->active_channel;
/* add the new channel */
gimage->channels = g_slist_insert (gimage->channels, cu->channel, cu->prev_position);
/* set the new channel */
gimage_set_active_channel (gimage, cu->channel);
/* update the area */
drawable_update (GIMP_DRAWABLE(cu->channel), 0, 0,
GIMP_DRAWABLE(cu->channel)->width, GIMP_DRAWABLE(cu->channel)->height);
}
return TRUE;
}
static void
undo_free_channel (UndoState state,
UndoType type,
void *cu_ptr)
{
ChannelUndo *cu;
cu = (ChannelUndo *) cu_ptr;
/* Only free the channel if we're freeing from the redo
* stack and it's a channel add, or if we're freeing from
* the undo stack and it's a channel remove
*/
if ((state == REDO && type == CHANNEL_ADD_UNDO) ||
(state == UNDO && type == CHANNEL_REMOVE_UNDO))
channel_delete (cu->channel);
g_free (cu);
}
/*********************************/
/* Channel Mod Undo */
int
undo_push_channel_mod (GImage *gimage,
void *channel_ptr)
{
Channel *channel;
TileManager *tiles;
Undo *new;
void **data;
int size;
channel = (Channel *) channel_ptr;
tiles = GIMP_DRAWABLE(channel)->tiles;
size = GIMP_DRAWABLE(channel)->width * GIMP_DRAWABLE(channel)->height + sizeof (void *) * 2;
if ((new = undo_push (gimage, size, CHANNEL_MOD, TRUE)))
{
data = (void **) g_malloc (sizeof (void *) * 2);
new->data = data;
new->pop_func = undo_pop_channel_mod;
new->free_func = undo_free_channel_mod;
data[0] = channel_ptr;
data[1] = (void *) tiles;
return TRUE;
}
else
{
tile_manager_destroy (tiles);
return FALSE;
}
}
static int
undo_pop_channel_mod (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
void **data;
TileManager *tiles;
TileManager *temp;
Channel *channel;
data = (void **) data_ptr;
channel = (Channel *) data[0];
tiles = (TileManager *) data[1];
/* Issue the first update */
drawable_update (GIMP_DRAWABLE(channel), 0, 0,
GIMP_DRAWABLE(channel)->width, GIMP_DRAWABLE(channel)->height);
temp = GIMP_DRAWABLE(channel)->tiles;
GIMP_DRAWABLE(channel)->tiles = tiles;
GIMP_DRAWABLE(channel)->width = tiles->width;
GIMP_DRAWABLE(channel)->height = tiles->height;
/* Set the new buffer */
data[1] = temp;
/* Issue the second update */
drawable_update (GIMP_DRAWABLE(channel), 0, 0,
GIMP_DRAWABLE(channel)->width, GIMP_DRAWABLE(channel)->height);
return TRUE;
}
static void
undo_free_channel_mod (UndoState state,
UndoType type,
void *data_ptr)
{
void ** data;
data = (void **) data_ptr;
tile_manager_destroy ((TileManager *) data[1]);
g_free (data);
}
/**************************************/
/* Floating Selection to Layer Undo */
int
undo_push_fs_to_layer (GImage *gimage,
void *fsu_ptr)
{
FStoLayerUndo *fsu;
Undo *new;
int size;
fsu = (FStoLayerUndo *) fsu_ptr;
size = sizeof (FStoLayerUndo);
if ((new = undo_push (gimage, size, FS_TO_LAYER_UNDO, TRUE)))
{
new->data = fsu_ptr;
new->pop_func = undo_pop_fs_to_layer;
new->free_func = undo_free_fs_to_layer;
return TRUE;
}
else
{
tile_manager_destroy (fsu->layer->fs.backing_store);
g_free (fsu);
return FALSE;
}
}
static int
undo_pop_fs_to_layer (GImage *gimage,
UndoState state,
UndoType type,
void *fsu_ptr)
{
FStoLayerUndo *fsu;
fsu = (FStoLayerUndo *) fsu_ptr;
switch (state)
{
case UNDO:
/* Update the preview for the floating sel */
drawable_invalidate_preview (GIMP_DRAWABLE(fsu->layer));
fsu->layer->fs.drawable = fsu->drawable;
gimage->active_layer = fsu->layer;
gimage->floating_sel = fsu->layer;
/* restore the contents of the drawable */
floating_sel_store (fsu->layer,
GIMP_DRAWABLE(fsu->layer)->offset_x,
GIMP_DRAWABLE(fsu->layer)->offset_y,
GIMP_DRAWABLE(fsu->layer)->width,
GIMP_DRAWABLE(fsu->layer)->height);
fsu->layer->fs.initial = TRUE;
/* clear the selection */
layer_invalidate_boundary (fsu->layer);
/* Update the preview for the gimage and underlying drawable */
drawable_invalidate_preview (GIMP_DRAWABLE(fsu->layer));
break;
case REDO:
/* restore the contents of the drawable */
floating_sel_restore (fsu->layer,
GIMP_DRAWABLE(fsu->layer)->offset_x,
GIMP_DRAWABLE(fsu->layer)->offset_y,
GIMP_DRAWABLE(fsu->layer)->width,
GIMP_DRAWABLE(fsu->layer)->height);
/* Update the preview for the gimage and underlying drawable */
drawable_invalidate_preview (GIMP_DRAWABLE(fsu->layer));
/* clear the selection */
layer_invalidate_boundary (fsu->layer);
/* update the pointers */
fsu->layer->fs.drawable = NULL;
gimage->floating_sel = NULL;
/* Update the fs drawable */
drawable_invalidate_preview (GIMP_DRAWABLE(fsu->layer));
break;
}
return TRUE;
}
static void
undo_free_fs_to_layer (UndoState state,
UndoType type,
void *fsu_ptr)
{
FStoLayerUndo *fsu;
fsu = (FStoLayerUndo *) fsu_ptr;
if (state == UNDO)
tile_manager_destroy (fsu->layer->fs.backing_store);
g_free (fsu);
}
/***********************************/
/* Floating Selection Rigor Undo */
int
undo_push_fs_rigor (GImage *gimage,
int layer_id)
{
Undo *new;
int size;
size = sizeof (int);
if ((new = undo_push (gimage, size, FS_RIGOR, FALSE)))
{
new->data = g_new (int, 1);
new->pop_func = undo_pop_fs_rigor;
new->free_func = undo_free_fs_rigor;
*((int *) new->data) = layer_id;
return TRUE;
}
else
return FALSE;
}
static int
undo_pop_fs_rigor (GImage *gimage,
UndoState state,
UndoType type,
void *layer_ptr)
{
int layer_id;
Layer *floating_layer;
layer_id = *((int *) layer_ptr);
if ((floating_layer = layer_get_ID (layer_id)) == NULL)
return FALSE;
if (! layer_is_floating_sel (floating_layer))
return FALSE;
switch (state)
{
case UNDO:
/* restore the contents of drawable the floating layer is attached to */
if (floating_layer->fs.initial == FALSE)
floating_sel_restore (floating_layer,
GIMP_DRAWABLE(floating_layer)->offset_x,
GIMP_DRAWABLE(floating_layer)->offset_y,
GIMP_DRAWABLE(floating_layer)->width,
GIMP_DRAWABLE(floating_layer)->height);
floating_layer->fs.initial = TRUE;
break;
case REDO:
/* store the affected area from the drawable in the backing store */
floating_sel_store (floating_layer,
GIMP_DRAWABLE(floating_layer)->offset_x,
GIMP_DRAWABLE(floating_layer)->offset_y,
GIMP_DRAWABLE(floating_layer)->width,
GIMP_DRAWABLE(floating_layer)->height);
floating_layer->fs.initial = TRUE;
break;
}
return TRUE;
}
static void
undo_free_fs_rigor (UndoState state,
UndoType type,
void *layer_ptr)
{
g_free (layer_ptr);
}
/***********************************/
/* Floating Selection Relax Undo */
int
undo_push_fs_relax (GImage *gimage,
int layer_id)
{
Undo *new;
int size;
size = sizeof (int);
if ((new = undo_push (gimage, size, FS_RELAX, FALSE)))
{
new->data = g_new (int, 1);
new->pop_func = undo_pop_fs_relax;
new->free_func = undo_free_fs_relax;
*((int *) new->data) = layer_id;
return TRUE;
}
else
return FALSE;
}
static int
undo_pop_fs_relax (GImage *gimage,
UndoState state,
UndoType type,
void *layer_ptr)
{
int layer_id;
Layer *floating_layer;
layer_id = *((int *) layer_ptr);
if ((floating_layer = layer_get_ID (layer_id)) == NULL)
return FALSE;
if (! layer_is_floating_sel (floating_layer))
return FALSE;
switch (state)
{
case UNDO:
/* store the affected area from the drawable in the backing store */
floating_sel_store (floating_layer,
GIMP_DRAWABLE(floating_layer)->offset_x,
GIMP_DRAWABLE(floating_layer)->offset_y,
GIMP_DRAWABLE(floating_layer)->width,
GIMP_DRAWABLE(floating_layer)->height);
floating_layer->fs.initial = TRUE;
break;
case REDO:
/* restore the contents of drawable the floating layer is attached to */
if (floating_layer->fs.initial == FALSE)
floating_sel_restore (floating_layer,
GIMP_DRAWABLE(floating_layer)->offset_x,
GIMP_DRAWABLE(floating_layer)->offset_y,
GIMP_DRAWABLE(floating_layer)->width,
GIMP_DRAWABLE(floating_layer)->height);
floating_layer->fs.initial = TRUE;
break;
}
return TRUE;
}
static void
undo_free_fs_relax (UndoState state,
UndoType type,
void *layer_ptr)
{
g_free (layer_ptr);
}
/*********************/
/* GImage Mod Undo */
int
undo_push_gimage_mod (GImage *gimage)
{
Undo *new;
int *data;
int size;
size = sizeof (int) * 3;
if ((new = undo_push (gimage, size, GIMAGE_MOD, TRUE)))
{
data = (int *) g_malloc (sizeof (int) * 3);
new->data = data;
new->pop_func = undo_pop_gimage_mod;
new->free_func = undo_free_gimage_mod;
data[0] = gimage->width;
data[1] = gimage->height;
data[2] = gimage->base_type;
return TRUE;
}
return FALSE;
}
static int
undo_pop_gimage_mod (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
int *data;
int tmp;
data = (int *) data_ptr;
tmp = data[0];
data[0] = gimage->width;
gimage->width = tmp;
tmp = data[1];
data[1] = gimage->height;
gimage->height = tmp;
tmp = data[2];
data[2] = gimage->base_type;
gimage->base_type = tmp;
gimage_projection_realloc (gimage);
gimage_mask_invalidate (gimage);
channel_invalidate_previews (gimage);
layer_invalidate_previews (gimage);
gimage_invalidate_preview (gimage);
gdisplays_update_full (gimage);
gdisplays_update_title (gimage);
gimp_image_colormap_changed (gimage, -1);
if (gimage->width != (int) data[0] || gimage->height != (int) data[1])
shrink_wrap = TRUE;
return TRUE;
}
static void
undo_free_gimage_mod (UndoState state,
UndoType type,
void *data_ptr)
{
g_free (data_ptr);
}
/***********/
/* Qmask */
typedef struct _QmaskUndo QmaskUndo;
struct _QmaskUndo
{
GImage *gimage;
int qmask;
};
int
undo_push_qmask (GImage *gimage)
{
Undo *new;
QmaskUndo *data;
long size;
size = sizeof (QmaskUndo);
if ((new = undo_push (gimage, size, QMASK_UNDO, TRUE)))
{
data = g_new (QmaskUndo, 1);
new->data = data;
new->pop_func = undo_pop_qmask;
new->free_func = undo_free_qmask;
data->gimage = gimage;
data->qmask = gimage->qmask_state;
return TRUE;
}
return FALSE;
}
static int
undo_pop_qmask (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
QmaskUndo *data;
int tmp;
data = data_ptr;
tmp = gimage->qmask_state;
gimage->qmask_state = data->qmask;
data->qmask = tmp;
return TRUE;
}
static void
undo_free_qmask (UndoState state,
UndoType type,
void *data_ptr)
{
g_free (data_ptr);
}
/***********/
/* Guide */
typedef struct _GuideUndo GuideUndo;
struct _GuideUndo
{
GImage *gimage;
Guide *guide;
Guide orig;
};
int
undo_push_guide (GImage *gimage,
void *guide)
{
Undo *new;
GuideUndo *data;
long size;
size = sizeof (GuideUndo);
if ((new = undo_push (gimage, size, GUIDE_UNDO, TRUE)))
{
((Guide *)(guide))->ref_count++;
data = g_new (GuideUndo, 1);
new->data = data;
new->pop_func = undo_pop_guide;
new->free_func = undo_free_guide;
data->gimage = gimage;
data->guide = guide;
data->orig = *(data->guide);
return TRUE;
}
return FALSE;
}
static int
undo_pop_guide (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
GuideUndo *data;
Guide tmp;
int tmp_ref;
data = data_ptr;
gdisplays_expose_guide (gimage, data->guide);
tmp_ref = data->guide->ref_count;
tmp = *(data->guide);
*(data->guide) = data->orig;
data->guide->ref_count = tmp_ref;
data->orig = tmp;
gdisplays_expose_guide (gimage, data->guide);
return TRUE;
}
static void
undo_free_guide (UndoState state,
UndoType type,
void *data_ptr)
{
GuideUndo *data;
data = data_ptr;
data->guide->ref_count--;
if (data->guide->position < 0 && data->guide->ref_count <= 0)
{
gimp_image_remove_guide (data->gimage, data->guide);
g_free (data->guide);
}
g_free (data);
}
/****************/
/* Resolution */
typedef struct _ResolutionUndo ResolutionUndo;
struct _ResolutionUndo
{
gdouble xres;
gdouble yres;
GUnit unit;
};
int
undo_push_resolution (GImage *gimage)
{
Undo *new;
ResolutionUndo *data;
long size;
size = sizeof (ResolutionUndo);
if ((new = undo_push (gimage, size, RESOLUTION_UNDO, TRUE)))
{
data = g_new (ResolutionUndo, 1);
new->data = data;
new->pop_func = undo_pop_resolution;
new->free_func = undo_free_resolution;
data->xres = gimage->xresolution;
data->yres = gimage->yresolution;
data->unit = gimage->unit;
return TRUE;
}
return FALSE;
}
static int
undo_pop_resolution (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
ResolutionUndo *data;
gdouble tmpres;
GUnit tmpunit;
data = data_ptr;
tmpres = gimage->xresolution;
gimage->xresolution = data->xres;
data->xres = tmpres;
tmpres = gimage->yresolution;
gimage->yresolution = data->yres;
data->yres = tmpres;
if (data->unit != gimage->unit)
{
tmpunit = gimage->unit;
gimage->unit = data->unit;
data->unit = tmpunit;
gdisplays_resize_cursor_label (gimage);
}
/* really just want to recalc size and repaint */
gdisplays_shrink_wrap (gimage);
return TRUE;
}
static void
undo_free_resolution (UndoState state,
UndoType type,
void *data_ptr)
{
g_free (data_ptr);
}
/************/
/* Parasite */
typedef struct _ParasiteUndo ParasiteUndo;
struct _ParasiteUndo
{
GImage *gimage;
GimpDrawable *drawable;
Parasite *parasite;
char *name;
};
int
undo_push_image_parasite (GImage *gimage,
void *parasite)
{
Undo *new;
ParasiteUndo *data;
long size;
size = sizeof (ParasiteUndo);
if ((new = undo_push (gimage, size, PARASITE_ATTACH_UNDO, TRUE)))
{
data = g_new (ParasiteUndo, 1);
new->data = data;
new->pop_func = undo_pop_parasite;
new->free_func = undo_free_parasite;
data->gimage = gimage;
data->drawable = NULL;
data->name = g_strdup (parasite_name (parasite));
data->parasite = parasite_copy (gimp_image_parasite_find (gimage, data->name));
return TRUE;
}
return FALSE;
}
int
undo_push_image_parasite_remove (GImage *gimage,
const char *name)
{
Undo *new;
ParasiteUndo *data;
long size;
size = sizeof (ParasiteUndo);
if ((new = undo_push (gimage, size, PARASITE_REMOVE_UNDO, TRUE)))
{
data = g_new (ParasiteUndo, 1);
new->data = data;
new->pop_func = undo_pop_parasite;
new->free_func = undo_free_parasite;
data->gimage = gimage;
data->drawable = NULL;
data->name = g_strdup (name);
data->parasite = parasite_copy (gimp_image_parasite_find (gimage, data->name));
return TRUE;
}
return FALSE;
}
int
undo_push_drawable_parasite (GImage *gimage,
GimpDrawable *drawable,
void *parasite)
{
Undo *new;
ParasiteUndo *data;
long size;
size = sizeof (ParasiteUndo);
if ((new = undo_push (gimage, size, GIMAGE_MOD, TRUE)))
{
data = g_new (ParasiteUndo, 1);
new->data = data;
new->pop_func = undo_pop_parasite;
new->free_func = undo_free_parasite;
data->gimage = NULL;
data->drawable = drawable;
data->name = g_strdup (parasite_name (parasite));
data->parasite = parasite_copy (gimp_drawable_parasite_find (drawable, data->name));
return TRUE;
}
return FALSE;
}
int
undo_push_drawable_parasite_remove (GImage *gimage,
GimpDrawable *drawable,
const char *name)
{
Undo *new;
ParasiteUndo *data;
long size;
size = sizeof (ParasiteUndo);
if ((new = undo_push (gimage, size, GIMAGE_MOD, TRUE)))
{
data = g_new (ParasiteUndo, 1);
new->data = data;
new->pop_func = undo_pop_parasite;
new->free_func = undo_free_parasite;
data->gimage = NULL;
data->drawable = drawable;
data->name = g_strdup (name);
data->parasite = parasite_copy (gimp_drawable_parasite_find (drawable, data->name));
return TRUE;
}
return FALSE;
}
static int
undo_pop_parasite (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
ParasiteUndo *data;
Parasite *tmp;
data = data_ptr;
tmp = data->parasite;
if (data->gimage)
{
data->parasite = parasite_copy (gimp_image_parasite_find (gimage,
data->name));
if (tmp)
parasite_list_add (data->gimage->parasites, tmp);
else
parasite_list_remove (data->gimage->parasites, data->name);
}
else if (data->drawable)
{
data->parasite = parasite_copy (gimp_drawable_parasite_find (data->drawable,
data->name));
if (tmp)
parasite_list_add (data->drawable->parasites, tmp);
else
parasite_list_remove (data->drawable->parasites, data->name);
}
else
{
data->parasite = parasite_copy (gimp_parasite_find (data->name));
if (tmp)
gimp_parasite_attach (tmp);
else
gimp_parasite_detach (data->name);
}
if (tmp)
parasite_free (tmp);
return TRUE;
}
static void
undo_free_parasite (UndoState state,
UndoType type,
void *data_ptr)
{
ParasiteUndo *data;
data = data_ptr;
if (data->parasite)
parasite_free (data->parasite);
if (data->name)
g_free (data->name);
g_free (data_ptr);
}
/*************/
/* Layer re-position */
typedef struct {
GimpLayer *layer;
gint old_position;
} LayerRepositionUndo;
int
undo_push_layer_reposition (GImage *gimage,
GimpLayer *layer)
{
Undo *new;
LayerRepositionUndo *data;
long size;
size = sizeof (LayerRepositionUndo);
if ((new = undo_push (gimage, size, LAYER_REPOSITION_UNDO, TRUE)))
{
data = g_new (LayerRepositionUndo, 1);
new->data = data;
new->pop_func = undo_pop_layer_reposition;
new->free_func = undo_free_layer_reposition;
data->layer = layer;
data->old_position = g_slist_index (gimage->layers, layer);
return TRUE;
}
return FALSE;
}
static int
undo_pop_layer_reposition (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
LayerRepositionUndo *data = data_ptr;
gint tmp;
/* what's the layer's current index? */
tmp = g_slist_index (gimage->layers, data->layer);
gimp_image_position_layer (gimage, data->layer, data->old_position, FALSE);
data->old_position = tmp;
return TRUE;
}
static void
undo_free_layer_reposition (UndoState state,
UndoType type,
void *data_ptr)
{
g_free (data_ptr);
}
/*************/
/* Layer name change */
typedef struct {
GimpLayer *layer;
gchar *old_name;
} LayerRenameUndo;
int
undo_push_layer_rename (GImage *gimage,
GimpLayer *layer)
{
Undo *new;
LayerRenameUndo *data;
long size;
size = sizeof (LayerRenameUndo);
if ((new = undo_push (gimage, size, LAYER_RENAME_UNDO, TRUE)))
{
data = g_new (LayerRenameUndo, 1);
new->data = data;
new->pop_func = undo_pop_layer_rename;
new->free_func = undo_free_layer_rename;
data->layer = layer;
data->old_name = g_strdup (layer_get_name (layer));
return TRUE;
}
return FALSE;
}
static int
undo_pop_layer_rename (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
LayerRenameUndo *data = data_ptr;
gchar *tmp;
tmp = g_strdup (layer_get_name (data->layer));
layer_set_name (data->layer, data->old_name);
g_free (data->old_name);
data->old_name = tmp;
return TRUE;
}
static void
undo_free_layer_rename (UndoState state,
UndoType type,
void *data_ptr)
{
LayerRenameUndo *data = data_ptr;
g_free (data->old_name);
g_free (data);
}
/*************/
/* Something for which programmer is too lazy to write an undo
* function for.
*/
int
undo_push_cantundo (GImage *gimage,
const char *action)
{
Undo *new;
/* This is the sole purpose of this type of undo: the ability to
* mark an image as having been mutated, without really providing
* any adequate undo facility. */
new = undo_push (gimage, 0, GIMAGE_MOD, TRUE);
if (!new)
return FALSE;
new->data = (void*)action;
new->pop_func = undo_pop_cantundo;
new->free_func = undo_free_cantundo;
return TRUE;
}
static int
undo_pop_cantundo (GImage *gimage,
UndoState state,
UndoType type,
void *data_ptr)
{
char *action = data_ptr;
switch (state) {
case UNDO:
g_message (_("Can't undo %s"), action);
break;
case REDO:
break;
}
return TRUE;
}
static void
undo_free_cantundo (UndoState state,
UndoType type,
void *data_ptr)
{
/* nothing to free */
}
/* A "ok" to the name means I've checked where it's used and
it seems plausible. -- austin 23/9/99 */
static struct undo_name_t {
UndoType type;
const char *name;
} undo_name[] = {
{UNDO_NULL, N_("<<invalid>>")},
{IMAGE_UNDO, N_("image")},
{IMAGE_MOD_UNDO, N_("image mod")},
{MASK_UNDO, N_("mask")},
{LAYER_DISPLACE_UNDO, N_("layer move")}, /* ok */
{TRANSFORM_UNDO, N_("transform")},
{PAINT_UNDO, N_("paint")},
{LAYER_ADD_UNDO, N_("new layer")},
{LAYER_REMOVE_UNDO, N_("delete layer")},
{LAYER_MOD, N_("layer mod")},
{LAYER_MASK_ADD_UNDO, N_("add layer mask")}, /* ok */
{LAYER_MASK_REMOVE_UNDO, N_("delete layer mask")}, /* ok */
{LAYER_RENAME_UNDO, N_("rename layer")},
{LAYER_REPOSITION_UNDO, N_("layer reposition")}, /* ok */
{CHANNEL_ADD_UNDO, N_("new channel")},
{CHANNEL_REMOVE_UNDO, N_("delete channel")},
{CHANNEL_MOD, N_("channel mod")},
{FS_TO_LAYER_UNDO, N_("FS to layer")}, /* ok */
{GIMAGE_MOD, N_("gimage")},
{FS_RIGOR, N_("FS rigor")},
{FS_RELAX, N_("FS relax")},
{GUIDE_UNDO, N_("guide")},
{TEXT_UNDO, N_("text")},
{FLOAT_MASK_UNDO, N_("float selection")},
{EDIT_PASTE_UNDO, N_("paste")},
{EDIT_CUT_UNDO, N_("cut")},
{TRANSFORM_CORE_UNDO, N_("transform core")},
{PAINT_CORE_UNDO, N_("paint core")},
{FLOATING_LAYER_UNDO, N_("floating layer")}, /* unused! */
{LINKED_LAYER_UNDO, N_("linked layer")},
{LAYER_APPLY_MASK_UNDO, N_("apply layer mask")}, /* ok */
{LAYER_MERGE_UNDO, N_("layer merge")},
{FS_ANCHOR_UNDO, N_("FS anchor")},
{GIMAGE_MOD_UNDO, N_("gimage mod")},
{CROP_UNDO, N_("crop")},
{LAYER_SCALE_UNDO, N_("layer scale")},
{LAYER_RESIZE_UNDO, N_("layer resize")},
{QMASK_UNDO, N_("quickmask")},
{PARASITE_ATTACH_UNDO, N_("attach parasite")},
{PARASITE_REMOVE_UNDO, N_("remove parasite")},
{RESOLUTION_UNDO, N_("resolution change")},
{IMAGE_SCALE_UNDO, N_("image scale")},
{IMAGE_RESIZE_UNDO, N_("image resize")},
{MISC_UNDO, N_("misc")}
};
#define NUM_NAMES (sizeof (undo_name) / sizeof (struct undo_name_t))
static const char *
undo_type_to_name (UndoType type)
{
int i;
for (i=0; i < NUM_NAMES; i++)
if (undo_name[i].type == type)
return gettext (undo_name[i].name);
/* no name found */
return "";
}
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