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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.h>
-
- #include "apptypes.h"
-
- #include "appenv.h"
- #include "drawable.h"
- #include "layer.h"
- #include "floating_sel.h"
- #include "gdisplay.h"
- #include "gimage.h"
- #include "gimage_mask.h"
- #include "paint_funcs.h"
- #include "undo.h"
-
- #include "layer_pvt.h"
- #include "tile_manager_pvt.h" /* ick. */
-
- #include "libgimp/gimpmath.h"
-
- #include "libgimp/gimpintl.h"
-
-
- 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
- */
- gimp_drawable_invalidate_preview (GIMP_DRAWABLE (layer), TRUE);
-
- /* 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. */
-
- gimp_drawable_invalidate_preview (layer->fs.drawable, TRUE);
-
- /* 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
- */
- gimp_drawable_invalidate_preview (GIMP_DRAWABLE (layer), TRUE);
-
- /* 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 */
- gimp_drawable_invalidate_preview (layer->fs.drawable, TRUE);
-
- /* Invalidate the boundary */
- layer->fs.boundary_known = FALSE;
- }
-