mirror of https://github.com/GNOME/gimp.git
433 lines
11 KiB
C
433 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 "core/core-types.h"
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#include "base/pixel-region.h"
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#include "base/tile-manager.h"
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#include "base/tile.h"
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#include "paint-funcs/paint-funcs.h"
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#include "core/gimpdrawable.h"
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#include "core/gimpimage.h"
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#include "gdisplay.h"
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#include "image_map.h"
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typedef enum
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{
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IMAGE_MAP_WAITING,
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IMAGE_MAP_WORKING
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} ImageMapState;
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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;
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PixelRegion destPR;
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PixelRegionIterator *PRI;
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ImageMapState state;
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guint idle_id;
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};
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/* local function prototypes */
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static gboolean image_map_do (gpointer data);
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/* public functions */
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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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g_return_val_if_fail (gdisp != NULL, NULL);
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g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
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image_map = g_new0 (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->apply_func = NULL;
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image_map->user_data = NULL;
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image_map->state = IMAGE_MAP_WAITING;
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image_map->idle_id = 0;
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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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*/
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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 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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gpointer apply_data)
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{
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gint x1, y1;
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gint x2, y2;
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gint offset_x, offset_y;
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gint width, height;
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g_return_if_fail (image_map != NULL);
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g_return_if_fail (apply_func != NULL);
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image_map->apply_func = apply_func;
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image_map->user_data = apply_data;
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/* If we're still working, remove the timer */
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if (image_map->state == IMAGE_MAP_WORKING)
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{
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g_source_remove (image_map->idle_id);
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image_map->idle_id = 0;
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pixel_regions_process_stop (image_map->PRI);
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image_map->PRI = 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,
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* allocate new
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*/
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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->PRI = pixel_regions_register (2,
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&image_map->srcPR,
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&image_map->destPR);
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/* Start the intermittant work procedure */
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image_map->state = IMAGE_MAP_WORKING;
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image_map->idle_id = g_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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gint x1, y1, x2, y2;
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g_return_if_fail (image_map != NULL);
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if (image_map->state == IMAGE_MAP_WORKING)
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{
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g_source_remove (image_map->idle_id);
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image_map->idle_id = 0;
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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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gimp_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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PixelRegion srcPR, destPR;
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g_return_if_fail (image_map != NULL);
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if (image_map->state == IMAGE_MAP_WORKING)
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{
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g_source_remove (image_map->idle_id);
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image_map->idle_id = 0;
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pixel_regions_process_stop (image_map->PRI);
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image_map->PRI = NULL;
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}
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image_map->state = IMAGE_MAP_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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gimp_drawable_update (image_map->drawable,
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offset_x, offset_y,
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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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g_return_if_fail (image_map != NULL);
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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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g_return_val_if_fail (image_map != NULL, NULL);
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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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/* private functions */
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static gboolean
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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 = IMAGE_MAP_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,
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&image_map->destPR,
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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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gimp_drawable_update (image_map->drawable,
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x, y,
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w, h);
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gdisplay_flush_now (image_map->gdisp);
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}
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image_map->PRI = pixel_regions_process (image_map->PRI);
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if (image_map->PRI == NULL)
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{
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image_map->state = IMAGE_MAP_WAITING;
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gdisplays_flush ();
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return FALSE;
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}
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return TRUE;
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}
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