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gimp/app/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 <stdlib.h>
#include <string.h>
#include "appenv.h"
#include "drawable.h"
#include "layer.h"
#include "errors.h"
#include "floating_sel.h"
#include "gdisplay.h"
#include "gimage.h"
#include "gimage_mask.h"
#include "interface.h"
#include "paint_funcs.h"
#include "undo.h"
#include "config.h"
#include "libgimp/gimpintl.h"
#include "layer_pvt.h"
#include "tile_manager_pvt.h" /* ick. */
void
floating_sel_attach (Layer *layer,
GimpDrawable *drawable)
{
GImage *gimage;
Layer *floating_sel;
if (! (gimage = drawable_gimage (drawable)))
return;
/* If there is already a floating selection, anchor it */
if (gimage->floating_sel != NULL)
{
floating_sel = gimage->floating_sel;
floating_sel_anchor (gimage_floating_sel (gimage));
/* if we were pasting to the old floating selection, paste now to the drawable */
if (drawable == GIMP_DRAWABLE (floating_sel))
drawable = gimage_active_drawable (gimage);
}
/* set the drawable and allocate a backing store */
layer->preserve_trans = TRUE;
layer->fs.drawable = drawable;
layer->fs.backing_store =
tile_manager_new (GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height,
drawable_bytes (drawable));
/* because setting the sensitivity in the layers_dialog lock call redraws the
* previews, we need to lock the dialogs before the floating sel is actually added.
* however, they won't lock unless we set the gimage's floating sel pointer
*/
gimage->floating_sel = layer;
/* add the layer to the gimage */
gimage_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 (Layer *layer)
{
GImage *gimage;
if (! (gimage = drawable_gimage (layer->fs.drawable)))
return;
/* 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
*/
drawable_invalidate_preview (GIMP_DRAWABLE (layer));
/* remove the layer from the gimage */
gimage_remove_layer (gimage, layer);
}
void
floating_sel_anchor (Layer *layer)
{
GImage *gimage;
if (! (gimage = drawable_gimage (GIMP_DRAWABLE (layer))))
return;
if (! layer_is_floating_sel (layer))
{
g_message (_("Cannot anchor this layer because\nit is not a floating selection."));
return;
}
/* Start a floating selection anchoring undo */
undo_push_group_start (gimage, FS_ANCHOR_UNDO);
/* Invalidate the previews of the layer that will be composited with the floating section. */
drawable_invalidate_preview (layer->fs.drawable);
/* Relax the floating selection */
floating_sel_relax (layer, TRUE);
/* Composite the floating selection contents */
floating_sel_composite (layer,
GIMP_DRAWABLE (layer)->offset_x,
GIMP_DRAWABLE (layer)->offset_y,
GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height, TRUE);
/* remove the floating selection */
gimage_remove_layer (gimage, layer);
/* end the group undo */
undo_push_group_end (gimage);
/* invalidate the boundaries */
gimage_mask_invalidate (gimage);
}
void
floating_sel_reset (Layer *layer)
{
GImage *gimage;
if (! (gimage = drawable_gimage (GIMP_DRAWABLE (layer))))
return;
/* set the underlying drawable to active */
if (GIMP_IS_LAYER (layer->fs.drawable))
gimage_set_active_layer (gimage, GIMP_LAYER (layer->fs.drawable));
else if (GIMP_IS_LAYER_MASK (layer->fs.drawable))
gimage_set_active_layer (gimage,
GIMP_LAYER_MASK (layer->fs.drawable)->layer);
else if (GIMP_IS_CHANNEL (layer->fs.drawable))
{
gimage_set_active_channel (gimage, GIMP_CHANNEL (layer->fs.drawable));
if (gimage->layers)
gimage->active_layer = (((Layer *) gimage->layer_stack->data));
else
gimage->active_layer = NULL;
}
}
void
floating_sel_to_layer (Layer *layer)
{
FStoLayerUndo *fsu;
int off_x, off_y;
int width, height;
GImage *gimage;
if (! (gimage = drawable_gimage (GIMP_DRAWABLE (layer))))
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\n"
"selection because it belongs to a\n"
"layer mask or channel."));
return;
}
/* restore the contents of the drawable */
floating_sel_restore (layer,
GIMP_DRAWABLE (layer)->offset_x,
GIMP_DRAWABLE (layer)->offset_y,
GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height);
/* determine whether the resulting layer needs an update */
drawable_offsets (layer->fs.drawable, &off_x, &off_y);
width = drawable_width (layer->fs.drawable);
height = drawable_height (layer->fs.drawable);
/* update the fs drawable--this updates the gimage composite preview
* as well as the underlying drawable's
*/
drawable_invalidate_preview (GIMP_DRAWABLE (layer));
/* allocate the undo structure */
fsu = g_new (FStoLayerUndo, 1);
fsu->layer = layer;
fsu->drawable = layer->fs.drawable;
undo_push_fs_to_layer (gimage, fsu);
/* clear the selection */
layer_invalidate_boundary (layer);
/* Set pointers */
layer->fs.drawable = NULL;
gimage->floating_sel = NULL;
GIMP_DRAWABLE (layer)->visible = TRUE;
/* if the floating selection exceeds the attached layer's extents,
update the new layer */
/* I don't think that the preview is ever valid as is, since the layer
will be added on top of the others. Revert this if I'm wrong.
msw@gimp.org
*/
drawable_update (GIMP_DRAWABLE (layer),
0, 0,
GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height);
/* This may be undesirable when invoked non-interactively... we'll see. */
/*reinit_layer_idlerender (gimage, layer);*/
}
void
floating_sel_store (Layer *layer,
int x,
int y,
int w,
int h)
{
PixelRegion srcPR, destPR;
int offx, offy;
int x1, y1, x2, y2;
/* Check the backing store & make sure it has the correct dimensions */
if (layer->fs.backing_store->width != drawable_width (GIMP_DRAWABLE(layer)) ||
layer->fs.backing_store->height != drawable_height (GIMP_DRAWABLE(layer)) ||
layer->fs.backing_store->bpp != drawable_bytes (layer->fs.drawable))
{
/* free the backing store and allocate anew */
tile_manager_destroy (layer->fs.backing_store);
layer->fs.backing_store = tile_manager_new (GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height,
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
*/
drawable_offsets (layer->fs.drawable, &offx, &offy);
/* Find the minimum area we need to uncover -- in gimage space */
x1 = MAX (GIMP_DRAWABLE (layer)->offset_x, offx);
y1 = MAX (GIMP_DRAWABLE (layer)->offset_y, offy);
x2 = MIN (GIMP_DRAWABLE (layer)->offset_x + GIMP_DRAWABLE (layer)->width,
offx + drawable_width (layer->fs.drawable));
y2 = MIN (GIMP_DRAWABLE (layer)->offset_y + GIMP_DRAWABLE (layer)->height,
offy + drawable_height (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, drawable_data (layer->fs.drawable),
(x1 - offx), (y1 - offy), (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, layer->fs.backing_store,
(x1 - GIMP_DRAWABLE (layer)->offset_x),
(y1 - GIMP_DRAWABLE(layer)->offset_y),
(x2 - x1), (y2 - y1), TRUE);
copy_region (&srcPR, &destPR);
}
}
void
floating_sel_restore (Layer *layer,
int x,
int y,
int w,
int h)
{
PixelRegion srcPR, destPR;
int offx, offy;
int x1, y1, x2, y2;
/* 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 */
drawable_offsets (layer->fs.drawable, &offx, &offy);
x1 = MAX (GIMP_DRAWABLE (layer)->offset_x, offx);
y1 = MAX (GIMP_DRAWABLE (layer)->offset_y, offy);
x2 = MIN (GIMP_DRAWABLE (layer)->offset_x + GIMP_DRAWABLE (layer)->width,
offx + drawable_width (layer->fs.drawable));
y2 = MIN (GIMP_DRAWABLE(layer)->offset_y + GIMP_DRAWABLE (layer)->height,
offy + drawable_height (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_DRAWABLE (layer)->offset_x),
(y1 - GIMP_DRAWABLE (layer)->offset_y),
(x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, drawable_data (layer->fs.drawable),
(x1 - offx), (y1 - offy), (x2 - x1), (y2 - y1), TRUE);
copy_region (&srcPR, &destPR);
}
}
void
floating_sel_rigor (Layer *layer,
int undo)
{
GImage *gimage = GIMP_DRAWABLE(layer)->gimage;
/* store the affected area from the drawable in the backing store */
floating_sel_store (layer,
GIMP_DRAWABLE (layer)->offset_x,
GIMP_DRAWABLE (layer)->offset_y,
GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height);
layer->fs.initial = TRUE;
if (undo)
undo_push_fs_rigor (gimage, GIMP_DRAWABLE (layer)->ID);
}
void
floating_sel_relax (Layer *layer,
int undo)
{
GImage *gimage = GIMP_DRAWABLE(layer)->gimage;
/* restore the contents of drawable the floating layer is attached to */
if (layer->fs.initial == FALSE)
floating_sel_restore (layer,
GIMP_DRAWABLE (layer)->offset_x,
GIMP_DRAWABLE (layer)->offset_y,
GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height);
layer->fs.initial = TRUE;
if (undo)
undo_push_fs_relax (gimage, GIMP_DRAWABLE (layer)->ID);
}
void
floating_sel_composite (Layer *layer,
int x,
int y,
int w,
int h,
int undo)
{
PixelRegion fsPR;
GImage *gimage;
Layer *d_layer;
int preserve_trans;
int active[MAX_CHANNELS];
int offx, offy;
int x1, y1, x2, y2;
int i;
d_layer = NULL;
if (! (gimage = drawable_gimage (GIMP_DRAWABLE (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_DRAWABLE(layer)->visible)
layer->fs.initial = FALSE;
/* First restore what's behind the image if necessary, then check for visibility */
if (GIMP_DRAWABLE(layer)->visible)
{
/* Find the minimum area we need to composite -- in gimage space */
drawable_offsets (layer->fs.drawable, &offx, &offy);
x1 = MAX (GIMP_DRAWABLE (layer)->offset_x, offx);
y1 = MAX (GIMP_DRAWABLE (layer)->offset_y, offy);
x2 = MIN (GIMP_DRAWABLE (layer)->offset_x +
GIMP_DRAWABLE (layer)->width,
offx + drawable_width (layer->fs.drawable));
y2 = MIN (GIMP_DRAWABLE (layer)->offset_y +
GIMP_DRAWABLE (layer)->height,
offy + drawable_height (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_DRAWABLE (layer)->offset_x),
(y1 - GIMP_DRAWABLE (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 = d_layer->preserve_trans))
d_layer->preserve_trans = 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
*/
gimage_apply_image (gimage, layer->fs.drawable, &fsPR,
undo, layer->opacity, layer->mode,
NULL,
(x1 - offx), (y1 - offy));
/* restore preserve transparency */
if (preserve_trans)
d_layer->preserve_trans = TRUE;
/* restore gimage active channels */
for (i = 0; i < MAX_CHANNELS; i++)
gimage->active[i] = active[i];
}
}
}
BoundSeg *
floating_sel_boundary (Layer *layer,
int *num_segs)
{
PixelRegion bPR;
int i;
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_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height, FALSE);
layer->fs.segs = find_mask_boundary (&bPR, &layer->fs.num_segs,
WithinBounds, 0, 0,
GIMP_DRAWABLE (layer)->width,
GIMP_DRAWABLE (layer)->height);
/* offset the segments */
for (i = 0; i < layer->fs.num_segs; i++)
{
layer->fs.segs[i].x1 += GIMP_DRAWABLE (layer)->offset_x;
layer->fs.segs[i].y1 += GIMP_DRAWABLE (layer)->offset_y;
layer->fs.segs[i].x2 += GIMP_DRAWABLE (layer)->offset_x;
layer->fs.segs[i].y2 += GIMP_DRAWABLE (layer)->offset_y;
}
layer->fs.boundary_known = TRUE;
}
*num_segs = layer->fs.num_segs;
return layer->fs.segs;
}
void
floating_sel_invalidate (Layer *layer)
{
/* Invalidate the attached-to drawable's preview */
drawable_invalidate_preview (layer->fs.drawable);
/* Invalidate the boundary */
layer->fs.boundary_known = FALSE;
}
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