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gimp/app/core/gimplayer-floating-sel.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 <glib-object.h>
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "base/boundary.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "gimpimage.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimplayer.h"
#include "gimplayer-floating-sel.h"
#include "gimplayermask.h"
#include "gimp-intl.h"
void
floating_sel_attach (GimpLayer *layer,
GimpDrawable *drawable)
{
GimpImage *gimage;
GimpLayer *floating_sel;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (drawable != GIMP_DRAWABLE (layer));
g_return_if_fail (gimp_item_get_image (GIMP_ITEM (layer)) ==
gimp_item_get_image (GIMP_ITEM (drawable)));
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
floating_sel = gimp_image_floating_sel (gimage);
/* If there is already a floating selection, anchor it */
if (floating_sel)
{
floating_sel_anchor (floating_sel);
/* if we were pasting to the old floating selection, paste now
* to the drawable
*/
if (drawable == (GimpDrawable *) floating_sel)
drawable = gimp_image_active_drawable (gimage);
}
/* set the drawable and allocate a backing store */
gimp_layer_set_preserve_trans (layer, TRUE, FALSE);
layer->fs.drawable = drawable;
layer->fs.backing_store = tile_manager_new (GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
gimp_drawable_bytes (drawable));
/* add the layer to the gimage */
gimp_image_add_layer (gimage, layer, 0);
/* store the affected area from the drawable in the backing store */
floating_sel_rigor (layer, TRUE);
}
void
floating_sel_remove (GimpLayer *layer)
{
GimpImage *gimage;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
gimage = gimp_item_get_image (GIMP_ITEM (layer->fs.drawable));
gimp_image_undo_group_start (gimage, GIMP_UNDO_GROUP_FS_REMOVE,
_("Remove Floating Selection"));
/* store the affected area from the drawable in the backing store */
floating_sel_relax (layer, TRUE);
/* invalidate the preview of the obscured drawable. We do this here
* because it will not be done until the floating selection is removed,
* at which point the obscured drawable's preview will not be declared invalid
*/
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer));
/* remove the layer from the gimage */
gimp_image_remove_layer (gimage, layer);
gimp_image_undo_group_end (gimage);
}
void
floating_sel_anchor (GimpLayer *layer)
{
GimpImage *gimage;
GimpDrawable *drawable;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
gimage = gimp_item_get_image (GIMP_ITEM (layer));
if (! gimp_layer_is_floating_sel (layer))
{
g_message (_("Cannot anchor this layer because "
"it is not a floating selection."));
return;
}
/* Start a floating selection anchoring undo */
gimp_image_undo_group_start (gimage, GIMP_UNDO_GROUP_FS_ANCHOR,
_("Anchor Floating Selection"));
/* Invalidate the previews of the layer that will be composited
* with the floating section.
*/
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer->fs.drawable));
/* Relax the floating selection */
floating_sel_relax (layer, TRUE);
/* Composite the floating selection contents */
floating_sel_composite (layer,
GIMP_ITEM (layer)->offset_x,
GIMP_ITEM (layer)->offset_y,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height, TRUE);
drawable = layer->fs.drawable;
/* remove the floating selection */
gimp_image_remove_layer (gimage, layer);
/* end the group undo */
gimp_image_undo_group_end (gimage);
/* invalidate the boundaries */
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (gimp_image_get_mask (gimage)));
}
void
floating_sel_activate_drawable (GimpLayer *layer)
{
GimpImage *gimage;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
gimage = gimp_item_get_image (GIMP_ITEM (layer));
/* set the underlying drawable to active */
if (GIMP_IS_LAYER_MASK (layer->fs.drawable))
{
GimpLayerMask *mask = GIMP_LAYER_MASK (layer->fs.drawable);
gimp_image_set_active_layer (gimage, gimp_layer_mask_get_layer (mask));
}
else if (GIMP_IS_CHANNEL (layer->fs.drawable))
{
gimp_image_set_active_channel (gimage, GIMP_CHANNEL (layer->fs.drawable));
}
else
{
gimp_image_set_active_layer (gimage, GIMP_LAYER (layer->fs.drawable));
}
}
void
floating_sel_to_layer (GimpLayer *layer)
{
GimpItem *item;
GimpImage *gimage;
gint off_x, off_y;
gint width, height;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
item = GIMP_ITEM (layer);
if (! (gimage = gimp_item_get_image (item)))
return;
/* Check if the floating layer belongs to a channel... */
if (GIMP_IS_CHANNEL (layer->fs.drawable))
{
g_message (_("Cannot create a new layer from the floating selection "
"because it belongs to a layer mask or channel."));
return;
}
/* restore the contents of the drawable */
floating_sel_restore (layer,
item->offset_x,
item->offset_y,
item->width,
item->height);
/* determine whether the resulting layer needs an update */
gimp_item_offsets (GIMP_ITEM (layer->fs.drawable), &off_x, &off_y);
width = gimp_item_width (GIMP_ITEM (layer->fs.drawable));
height = gimp_item_height (GIMP_ITEM (layer->fs.drawable));
gimp_image_undo_group_start (gimage, GIMP_UNDO_GROUP_FS_TO_LAYER,
_("Floating Selection to Layer"));
gimp_image_undo_push_fs_to_layer (gimage, NULL,
layer, layer->fs.drawable);
/* clear the selection */
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (layer));
/* Set pointers */
layer->fs.drawable = NULL;
gimage->floating_sel = NULL;
gimp_item_set_visible (GIMP_ITEM (layer), TRUE, TRUE);
gimp_image_undo_group_end (gimage);
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height);
gimp_image_floating_selection_changed (gimage);
}
void
floating_sel_store (GimpLayer *layer,
gint x,
gint y,
gint w,
gint h)
{
PixelRegion srcPR, destPR;
gint offx, offy;
gint x1, y1, x2, y2;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
/* Check the backing store & make sure it has the correct dimensions */
if ((tile_manager_width (layer->fs.backing_store) !=
gimp_item_width (GIMP_ITEM(layer))) ||
(tile_manager_height (layer->fs.backing_store) !=
gimp_item_height (GIMP_ITEM(layer))) ||
(tile_manager_bpp (layer->fs.backing_store) !=
gimp_drawable_bytes (layer->fs.drawable)))
{
/* free the backing store and allocate anew */
tile_manager_unref (layer->fs.backing_store);
layer->fs.backing_store =
tile_manager_new (GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
gimp_drawable_bytes (layer->fs.drawable));
}
/* What this function does is save the specified area of the
* drawable that this floating selection obscures. We do this so
* that it will be possible to subsequently restore the drawable's area
*/
gimp_item_offsets (GIMP_ITEM (layer->fs.drawable), &offx, &offy);
/* Find the minimum area we need to uncover -- in gimage space */
x1 = MAX (GIMP_ITEM (layer)->offset_x, offx);
y1 = MAX (GIMP_ITEM (layer)->offset_y, offy);
x2 = MIN (GIMP_ITEM (layer)->offset_x + GIMP_ITEM (layer)->width,
offx + gimp_item_width (GIMP_ITEM (layer->fs.drawable)));
y2 = MIN (GIMP_ITEM (layer)->offset_y + GIMP_ITEM (layer)->height,
offy + gimp_item_height (GIMP_ITEM (layer->fs.drawable)));
x1 = CLAMP (x, x1, x2);
y1 = CLAMP (y, y1, y2);
x2 = CLAMP (x + w, x1, x2);
y2 = CLAMP (y + h, y1, y2);
if ((x2 - x1) > 0 && (y2 - y1) > 0)
{
/* Copy the area from the drawable to the backing store */
pixel_region_init (&srcPR, gimp_drawable_data (layer->fs.drawable),
(x1 - offx), (y1 - offy), (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, layer->fs.backing_store,
(x1 - GIMP_ITEM (layer)->offset_x),
(y1 - GIMP_ITEM (layer)->offset_y),
(x2 - x1), (y2 - y1), TRUE);
copy_region (&srcPR, &destPR);
}
}
void
floating_sel_restore (GimpLayer *layer,
gint x,
gint y,
gint w,
gint h)
{
PixelRegion srcPR, destPR;
gint offx, offy;
gint x1, y1, x2, y2;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
/* What this function does is "uncover" the specified area in the
* drawable that this floating selection obscures. We do this so
* that either the floating selection can be removed or it can be
* translated
*/
/* Find the minimum area we need to uncover -- in gimage space */
gimp_item_offsets (GIMP_ITEM (layer->fs.drawable), &offx, &offy);
x1 = MAX (GIMP_ITEM (layer)->offset_x, offx);
y1 = MAX (GIMP_ITEM (layer)->offset_y, offy);
x2 = MIN (GIMP_ITEM (layer)->offset_x + GIMP_ITEM (layer)->width,
offx + gimp_item_width (GIMP_ITEM (layer->fs.drawable)));
y2 = MIN (GIMP_ITEM(layer)->offset_y + GIMP_ITEM (layer)->height,
offy + gimp_item_height (GIMP_ITEM (layer->fs.drawable)));
x1 = CLAMP (x, x1, x2);
y1 = CLAMP (y, y1, y2);
x2 = CLAMP (x + w, x1, x2);
y2 = CLAMP (y + h, y1, y2);
if ((x2 - x1) > 0 && (y2 - y1) > 0)
{
/* Copy the area from the backing store to the drawable */
pixel_region_init (&srcPR, layer->fs.backing_store,
(x1 - GIMP_ITEM (layer)->offset_x),
(y1 - GIMP_ITEM (layer)->offset_y),
(x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, gimp_drawable_data (layer->fs.drawable),
(x1 - offx), (y1 - offy), (x2 - x1), (y2 - y1), TRUE);
copy_region (&srcPR, &destPR);
}
}
void
floating_sel_rigor (GimpLayer *layer,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
/* store the affected area from the drawable in the backing store */
floating_sel_store (layer,
GIMP_ITEM (layer)->offset_x,
GIMP_ITEM (layer)->offset_y,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height);
layer->fs.initial = TRUE;
if (push_undo)
gimp_image_undo_push_fs_rigor (gimp_item_get_image (GIMP_ITEM (layer)),
NULL,
layer);
}
void
floating_sel_relax (GimpLayer *layer,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
/* restore the contents of drawable the floating layer is attached to */
if (layer->fs.initial == FALSE)
floating_sel_restore (layer,
GIMP_ITEM (layer)->offset_x,
GIMP_ITEM (layer)->offset_y,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height);
layer->fs.initial = TRUE;
if (push_undo)
gimp_image_undo_push_fs_relax (gimp_item_get_image (GIMP_ITEM (layer)),
NULL,
layer);
}
void
floating_sel_composite (GimpLayer *layer,
gint x,
gint y,
gint w,
gint h,
gboolean push_undo)
{
PixelRegion fsPR;
GimpImage *gimage;
GimpLayer *d_layer = NULL;
gint preserve_trans;
gint active[MAX_CHANNELS];
gint offx, offy;
gint x1, y1, x2, y2;
gint i;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
if (! (gimage = gimp_item_get_image (GIMP_ITEM (layer))))
return;
/* What this function does is composite the specified area of the
* drawble with the floating selection. We do this when the gimage
* is constructed, before any other composition takes place.
*/
/* If this isn't the first composite,
* restore the image underneath
*/
if (! layer->fs.initial)
floating_sel_restore (layer, x, y, w, h);
else if (gimp_item_get_visible (GIMP_ITEM (layer)))
layer->fs.initial = FALSE;
/* First restore what's behind the image if necessary,
* then check for visibility
*/
if (gimp_item_get_visible (GIMP_ITEM (layer)))
{
/* Find the minimum area we need to composite -- in gimage space */
gimp_item_offsets (GIMP_ITEM (layer->fs.drawable), &offx, &offy);
x1 = MAX (GIMP_ITEM (layer)->offset_x, offx);
y1 = MAX (GIMP_ITEM (layer)->offset_y, offy);
x2 = MIN (GIMP_ITEM (layer)->offset_x +
GIMP_ITEM (layer)->width,
offx + gimp_item_width (GIMP_ITEM (layer->fs.drawable)));
y2 = MIN (GIMP_ITEM (layer)->offset_y +
GIMP_ITEM (layer)->height,
offy + gimp_item_height (GIMP_ITEM (layer->fs.drawable)));
x1 = CLAMP (x, x1, x2);
y1 = CLAMP (y, y1, y2);
x2 = CLAMP (x + w, x1, x2);
y2 = CLAMP (y + h, y1, y2);
if ((x2 - x1) > 0 && (y2 - y1) > 0)
{
/* composite the area from the layer to the drawable */
pixel_region_init (&fsPR, GIMP_DRAWABLE (layer)->tiles,
(x1 - GIMP_ITEM (layer)->offset_x),
(y1 - GIMP_ITEM (layer)->offset_y),
(x2 - x1), (y2 - y1), FALSE);
/* a kludge here to prevent the case of the drawable
* underneath having preserve transparency on, and disallowing
* the composited floating selection from being shown
*/
if (GIMP_IS_LAYER (layer->fs.drawable))
{
d_layer = GIMP_LAYER (layer->fs.drawable);
if ((preserve_trans = gimp_layer_get_preserve_trans (d_layer)))
gimp_layer_set_preserve_trans (d_layer, FALSE, FALSE);
}
else
preserve_trans = FALSE;
/* We need to set all gimage channels to active to make sure that
* nothing strange happens while applying the floating selection.
* It wouldn't make sense for the floating selection to be affected
* by the active gimage channels.
*/
for (i = 0; i < MAX_CHANNELS; i++)
{
active[i] = gimage->active[i];
gimage->active[i] = 1;
}
/* apply the fs with the undo specified by the value
* passed to this function
*/
gimp_drawable_apply_region (layer->fs.drawable, &fsPR,
push_undo, NULL,
layer->opacity,
layer->mode,
NULL,
(x1 - offx), (y1 - offy));
/* restore preserve transparency */
if (preserve_trans)
gimp_layer_set_preserve_trans (d_layer, TRUE, FALSE);
/* restore gimage active channels */
for (i = 0; i < MAX_CHANNELS; i++)
gimage->active[i] = active[i];
}
}
}
const BoundSeg *
floating_sel_boundary (GimpLayer *layer,
gint *n_segs)
{
PixelRegion bPR;
gint i;
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
g_return_val_if_fail (gimp_layer_is_floating_sel (layer), NULL);
g_return_val_if_fail (n_segs != NULL, NULL);
if (layer->fs.boundary_known == FALSE)
{
if (layer->fs.segs)
g_free (layer->fs.segs);
/* find the segments */
pixel_region_init (&bPR, GIMP_DRAWABLE (layer)->tiles,
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height, FALSE);
layer->fs.segs = find_mask_boundary (&bPR, &layer->fs.num_segs,
WithinBounds, 0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
HALF_WAY);
/* offset the segments */
for (i = 0; i < layer->fs.num_segs; i++)
{
layer->fs.segs[i].x1 += GIMP_ITEM (layer)->offset_x;
layer->fs.segs[i].y1 += GIMP_ITEM (layer)->offset_y;
layer->fs.segs[i].x2 += GIMP_ITEM (layer)->offset_x;
layer->fs.segs[i].y2 += GIMP_ITEM (layer)->offset_y;
}
layer->fs.boundary_known = TRUE;
}
*n_segs = layer->fs.num_segs;
return layer->fs.segs;
}
void
floating_sel_invalidate (GimpLayer *layer)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_is_floating_sel (layer));
/* Invalidate the attached-to drawable's preview */
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer->fs.drawable));
/* Invalidate the boundary */
layer->fs.boundary_known = FALSE;
}
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