mirror of https://github.com/GNOME/gimp.git
398 lines
11 KiB
C
398 lines
11 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "apptypes.h"
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#include "paint-funcs/paint-funcs.h"
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#include "drawable.h"
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#include "gdisplay.h"
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#include "gimage_mask.h"
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#include "gimpdrawable.h"
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#include "gimpimage.h"
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#include "image_map.h"
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#include "pixel_region.h"
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#include "tile.h"
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#include "tile_manager.h"
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#define WAITING 0
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#define WORKING 1
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#define WORK_DELAY 1
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/* Local structures */
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typedef struct _ImageMap
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{
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GDisplay *gdisp;
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GimpDrawable *drawable;
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TileManager *undo_tiles;
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ImageMapApplyFunc apply_func;
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gpointer user_data;
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PixelRegion srcPR, destPR;
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void *pr;
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gint state;
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gint idle;
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} _ImageMap;
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/**************************/
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/* Function definitions */
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static gint
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image_map_do (gpointer data)
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{
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_ImageMap *_image_map;
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GimpImage *gimage;
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PixelRegion shadowPR;
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gint x, y, w, h;
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_image_map = (_ImageMap *) data;
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if (! (gimage = gimp_drawable_gimage ( (_image_map->drawable))))
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{
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_image_map->state = WAITING;
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return FALSE;
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}
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/* Process the pixel regions and apply the image mapping */
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(* _image_map->apply_func) (&_image_map->srcPR, &_image_map->destPR, _image_map->user_data);
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x = _image_map->destPR.x;
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y = _image_map->destPR.y;
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w = _image_map->destPR.w;
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h = _image_map->destPR.h;
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/* apply the results */
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pixel_region_init (&shadowPR, gimage->shadow, x, y, w, h, FALSE);
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gimp_image_apply_image (gimage, _image_map->drawable, &shadowPR,
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FALSE, OPAQUE_OPACITY, REPLACE_MODE, NULL, x, y);
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/* display the results */
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if (_image_map->gdisp)
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{
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drawable_update ( (_image_map->drawable), x, y, w, h);
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gdisplay_flush_now (_image_map->gdisp);
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}
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_image_map->pr = pixel_regions_process (_image_map->pr);
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if (_image_map->pr == NULL)
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{
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_image_map->state = WAITING;
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gdisplays_flush ();
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return FALSE;
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}
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else
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return TRUE;
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}
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ImageMap
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image_map_create (GDisplay *gdisp,
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GimpDrawable *drawable)
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{
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_ImageMap *_image_map;
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_image_map = g_new (_ImageMap, 1);
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_image_map->gdisp = gdisp;
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_image_map->drawable = drawable;
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_image_map->undo_tiles = NULL;
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_image_map->state = WAITING;
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/* Interactive tools based on image_map disable the undo stack */
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/* to avert any unintented undo interaction through the UI */
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gimp_image_undo_freeze(_image_map->gdisp->gimage);
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gdisplay_set_menu_sensitivity (_image_map->gdisp);
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return (ImageMap) _image_map;
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}
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void
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image_map_apply (ImageMap image_map,
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ImageMapApplyFunc apply_func,
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void *user_data)
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{
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_ImageMap *_image_map;
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gint x1, y1, x2, y2;
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gint offset_x, offset_y;
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gint width, height;
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_image_map = (_ImageMap *) image_map;
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_image_map->apply_func = apply_func;
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_image_map->user_data = user_data;
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/* If we're still working, remove the timer */
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if (_image_map->state == WORKING)
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{
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gtk_idle_remove (_image_map->idle);
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pixel_regions_process_stop (_image_map->pr);
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_image_map->pr = NULL;
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}
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/* Make sure the drawable is still valid */
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if (! gimp_drawable_gimage (_image_map->drawable))
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return;
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/* The application should occur only within selection bounds */
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gimp_drawable_mask_bounds (_image_map->drawable, &x1, &y1, &x2, &y2);
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/* If undo tiles don't exist, or change size, (re)allocate */
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if (_image_map->undo_tiles)
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{
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tile_manager_get_offsets (_image_map->undo_tiles, &offset_x, &offset_y);
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width = tile_manager_width (_image_map->undo_tiles);
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height = tile_manager_height (_image_map->undo_tiles);
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}
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else
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{
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offset_x = offset_y = width = height = 0;
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}
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if (!_image_map->undo_tiles ||
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offset_x != x1 || offset_y != y1 ||
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width != (x2 - x1) || height != (y2 - y1))
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{
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/* If either the extents changed or the tiles don't exist, allocate new */
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if (!_image_map->undo_tiles ||
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width != (x2 - x1) || height != (y2 - y1))
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{
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/* Destroy old tiles--If they exist */
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if (_image_map->undo_tiles != NULL)
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tile_manager_destroy (_image_map->undo_tiles);
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/* Allocate new tiles */
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_image_map->undo_tiles =
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tile_manager_new ((x2 - x1), (y2 - y1),
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gimp_drawable_bytes (_image_map->drawable));
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}
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/* Copy from the image to the new tiles */
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pixel_region_init (&_image_map->srcPR,
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gimp_drawable_data (_image_map->drawable),
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x1, y1, (x2 - x1), (y2 - y1), FALSE);
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pixel_region_init (&_image_map->destPR, _image_map->undo_tiles,
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0, 0, (x2 - x1), (y2 - y1), TRUE);
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copy_region (&_image_map->srcPR, &_image_map->destPR);
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/* Set the offsets */
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tile_manager_set_offsets (_image_map->undo_tiles, x1, y1);
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}
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else /* _image_map->undo_tiles exist AND drawable dimensions have not changed... */
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{
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/* Reset to initial drawable conditions. */
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/* Copy from the backup undo tiles to the drawable */
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pixel_region_init (&_image_map->srcPR, _image_map->undo_tiles,
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0, 0, width, height, FALSE);
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pixel_region_init (&_image_map->destPR,
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gimp_drawable_data (_image_map->drawable),
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offset_x, offset_y, width, height, TRUE);
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copy_region (&_image_map->srcPR, &_image_map->destPR);
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}
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/* Configure the src from the drawable data */
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pixel_region_init (&_image_map->srcPR, _image_map->undo_tiles,
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0, 0, (x2 - x1), (y2 - y1), FALSE);
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/* Configure the dest as the shadow buffer */
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pixel_region_init (&_image_map->destPR,
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gimp_drawable_shadow (_image_map->drawable),
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x1, y1, (x2 - x1), (y2 - y1), TRUE);
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/* Apply the image transformation to the pixels */
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_image_map->pr = pixel_regions_register (2, &_image_map->srcPR, &_image_map->destPR);
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/* Start the intermittant work procedure */
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_image_map->state = WORKING;
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_image_map->idle = gtk_idle_add (image_map_do, image_map);
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}
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void
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image_map_commit (ImageMap image_map)
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{
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_ImageMap *_image_map;
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gint x1, y1, x2, y2;
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_image_map = (_ImageMap *) image_map;
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if (_image_map->state == WORKING)
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{
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gtk_idle_remove (_image_map->idle);
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/* Finish the changes */
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while (image_map_do (image_map)) ;
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}
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/* Make sure the drawable is still valid */
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if (! gimp_drawable_gimage (_image_map->drawable))
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return;
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/* Interactive phase ends: we can commit an undo frame now */
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gimp_image_undo_thaw(_image_map->gdisp->gimage);
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/* Register an undo step */
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if (_image_map->undo_tiles)
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{
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tile_manager_get_offsets (_image_map->undo_tiles, &x1, &y1);
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x2 = x1 + tile_manager_width (_image_map->undo_tiles);
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y2 = y1 + tile_manager_height (_image_map->undo_tiles);
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drawable_apply_image (_image_map->drawable,
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x1, y1, x2, y2, _image_map->undo_tiles, FALSE);
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}
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gdisplay_set_menu_sensitivity (_image_map->gdisp);
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g_free (_image_map);
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}
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void
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image_map_clear (ImageMap image_map)
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{
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_ImageMap *_image_map;
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PixelRegion srcPR, destPR;
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_image_map = (_ImageMap *) image_map;
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if (_image_map->state == WORKING)
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{
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gtk_idle_remove (_image_map->idle);
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pixel_regions_process_stop (_image_map->pr);
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_image_map->pr = NULL;
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}
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_image_map->state = WAITING;
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/* Make sure the drawable is still valid */
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if (! gimp_drawable_gimage (_image_map->drawable))
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return;
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/* restore the original image */
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if (_image_map->undo_tiles)
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{
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gint offset_x;
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gint offset_y;
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gint width;
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gint height;
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tile_manager_get_offsets (_image_map->undo_tiles, &offset_x, &offset_y);
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width = tile_manager_width (_image_map->undo_tiles);
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height = tile_manager_height (_image_map->undo_tiles),
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/* Copy from the drawable to the tiles */
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pixel_region_init (&srcPR, _image_map->undo_tiles,
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0, 0, width, height, FALSE);
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pixel_region_init (&destPR,
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gimp_drawable_data (_image_map->drawable),
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offset_x, offset_y, width, height, TRUE);
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/* if the user has changed the image depth get out quickly */
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if (destPR.bytes != srcPR.bytes)
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{
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g_message ("image depth change, unable to restore original image");
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tile_manager_destroy (_image_map->undo_tiles);
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gimp_image_undo_thaw (_image_map->gdisp->gimage);
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gdisplay_set_menu_sensitivity (_image_map->gdisp);
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g_free (_image_map);
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return;
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}
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copy_region (&srcPR, &destPR);
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/* Update the area */
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drawable_update (_image_map->drawable, offset_x, offset_y, width, height);
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/* Free the undo_tiles tile manager */
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tile_manager_destroy (_image_map->undo_tiles);
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_image_map->undo_tiles = NULL;
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}
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}
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void
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image_map_abort (ImageMap image_map)
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{
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_ImageMap *_image_map = (_ImageMap *) image_map;
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image_map_clear(image_map);
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gimp_image_undo_thaw(_image_map->gdisp->gimage);
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gdisplay_set_menu_sensitivity (_image_map->gdisp);
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g_free (image_map);
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}
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guchar *
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image_map_get_color_at (ImageMap image_map,
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gint x,
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gint y)
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{
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Tile *tile;
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guchar *src;
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guchar *dest;
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_ImageMap *_image_map;
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if (!image_map)
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return NULL;
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_image_map = (_ImageMap *) image_map;
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if (x >= 0 && x < gimp_drawable_width (_image_map->drawable) &&
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y >= 0 && y < gimp_drawable_height (_image_map->drawable))
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{
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/* Check if done damage to original image */
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if (!_image_map->undo_tiles)
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return (gimp_drawable_get_color_at (_image_map->drawable, x, y));
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if (!image_map ||
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(!gimp_drawable_gimage (_image_map->drawable) &&
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gimp_drawable_is_indexed (_image_map->drawable)) ||
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x < 0 || y < 0 ||
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x >= tile_manager_width (_image_map->undo_tiles) ||
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y >= tile_manager_height (_image_map->undo_tiles))
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{
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return NULL;
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}
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dest = g_new (guchar, 5);
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tile = tile_manager_get_tile (_image_map->undo_tiles, x, y,
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TRUE, FALSE);
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src = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
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gimp_image_get_color (gimp_drawable_gimage (_image_map->drawable),
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gimp_drawable_type (_image_map->drawable),
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dest, src);
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if (GIMP_IMAGE_TYPE_HAS_ALPHA (gimp_drawable_type (_image_map->drawable)))
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dest[3] = src[gimp_drawable_bytes (_image_map->drawable) - 1];
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else
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dest[3] = 255;
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if (gimp_drawable_is_indexed (_image_map->drawable))
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dest[4] = src[0];
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else
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dest[4] = 0;
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tile_release (tile, FALSE);
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return dest;
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}
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else /* out of bounds error */
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{
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return NULL;
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}
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}
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