gimp/app/image_map.c

435 lines
12 KiB
C

/* 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 <gtk/gtk.h>
#include "display/display-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "base/tile.h"
#include "paint-funcs/paint-funcs.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplay-foreach.h"
#include "image_map.h"
typedef enum
{
IMAGE_MAP_WAITING,
IMAGE_MAP_WORKING
} ImageMapState;
struct _ImageMap
{
GDisplay *gdisp;
GimpDrawable *drawable;
TileManager *undo_tiles;
ImageMapApplyFunc apply_func;
gpointer user_data;
PixelRegion srcPR;
PixelRegion destPR;
PixelRegionIterator *PRI;
ImageMapState state;
guint idle_id;
};
/* local function prototypes */
static gboolean image_map_do (gpointer data);
/* public functions */
ImageMap *
image_map_create (GDisplay *gdisp,
GimpDrawable *drawable)
{
ImageMap *image_map;
g_return_val_if_fail (gdisp != NULL, NULL);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
image_map = g_new0 (ImageMap, 1);
image_map->gdisp = gdisp;
image_map->drawable = drawable;
image_map->undo_tiles = NULL;
image_map->apply_func = NULL;
image_map->user_data = NULL;
image_map->state = IMAGE_MAP_WAITING;
image_map->idle_id = 0;
/* Interactive tools based on image_map disable the undo stack
* to avert any unintented undo interaction through the UI
*/
gimp_image_undo_freeze (image_map->gdisp->gimage);
gdisplay_set_menu_sensitivity (image_map->gdisp);
return image_map;
}
void
image_map_apply (ImageMap *image_map,
ImageMapApplyFunc apply_func,
gpointer apply_data)
{
gint x1, y1;
gint x2, y2;
gint offset_x, offset_y;
gint width, height;
g_return_if_fail (image_map != NULL);
g_return_if_fail (apply_func != NULL);
image_map->apply_func = apply_func;
image_map->user_data = apply_data;
/* If we're still working, remove the timer */
if (image_map->state == IMAGE_MAP_WORKING)
{
g_source_remove (image_map->idle_id);
image_map->idle_id = 0;
pixel_regions_process_stop (image_map->PRI);
image_map->PRI = NULL;
}
/* Make sure the drawable is still valid */
if (! gimp_drawable_gimage (image_map->drawable))
return;
/* The application should occur only within selection bounds */
gimp_drawable_mask_bounds (image_map->drawable, &x1, &y1, &x2, &y2);
/* If undo tiles don't exist, or change size, (re)allocate */
if (image_map->undo_tiles)
{
tile_manager_get_offsets (image_map->undo_tiles, &offset_x, &offset_y);
width = tile_manager_width (image_map->undo_tiles);
height = tile_manager_height (image_map->undo_tiles);
}
else
{
offset_x = offset_y = width = height = 0;
}
if (! image_map->undo_tiles ||
offset_x != x1 || offset_y != y1 ||
width != (x2 - x1) || height != (y2 - y1))
{
/* If either the extents changed or the tiles don't exist,
* allocate new
*/
if (! image_map->undo_tiles ||
width != (x2 - x1) || height != (y2 - y1))
{
/* Destroy old tiles--If they exist */
if (image_map->undo_tiles != NULL)
tile_manager_destroy (image_map->undo_tiles);
/* Allocate new tiles */
image_map->undo_tiles =
tile_manager_new ((x2 - x1), (y2 - y1),
gimp_drawable_bytes (image_map->drawable));
}
/* Copy from the image to the new tiles */
pixel_region_init (&image_map->srcPR,
gimp_drawable_data (image_map->drawable),
x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&image_map->destPR, image_map->undo_tiles,
0, 0, (x2 - x1), (y2 - y1), TRUE);
copy_region (&image_map->srcPR, &image_map->destPR);
/* Set the offsets */
tile_manager_set_offsets (image_map->undo_tiles, x1, y1);
}
else /* image_map->undo_tiles exist AND drawable dimensions have not changed... */
{
/* Reset to initial drawable conditions. */
/* Copy from the backup undo tiles to the drawable */
pixel_region_init (&image_map->srcPR, image_map->undo_tiles,
0, 0, width, height, FALSE);
pixel_region_init (&image_map->destPR,
gimp_drawable_data (image_map->drawable),
offset_x, offset_y, width, height, TRUE);
copy_region (&image_map->srcPR, &image_map->destPR);
}
/* Configure the src from the drawable data */
pixel_region_init (&image_map->srcPR, image_map->undo_tiles,
0, 0, (x2 - x1), (y2 - y1), FALSE);
/* Configure the dest as the shadow buffer */
pixel_region_init (&image_map->destPR,
gimp_drawable_shadow (image_map->drawable),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
/* Apply the image transformation to the pixels */
image_map->PRI = pixel_regions_register (2,
&image_map->srcPR,
&image_map->destPR);
/* Start the intermittant work procedure */
image_map->state = IMAGE_MAP_WORKING;
image_map->idle_id = g_idle_add (image_map_do, image_map);
}
void
image_map_commit (ImageMap *image_map)
{
gint x1, y1, x2, y2;
g_return_if_fail (image_map != NULL);
if (image_map->state == IMAGE_MAP_WORKING)
{
g_source_remove (image_map->idle_id);
image_map->idle_id = 0;
/* Finish the changes */
while (image_map_do (image_map));
}
/* Make sure the drawable is still valid */
if (! gimp_drawable_gimage (image_map->drawable))
return;
/* Interactive phase ends: we can commit an undo frame now */
gimp_image_undo_thaw(image_map->gdisp->gimage);
/* Register an undo step */
if (image_map->undo_tiles)
{
tile_manager_get_offsets (image_map->undo_tiles, &x1, &y1);
x2 = x1 + tile_manager_width (image_map->undo_tiles);
y2 = y1 + tile_manager_height (image_map->undo_tiles);
gimp_drawable_apply_image (image_map->drawable,
x1, y1, x2, y2, image_map->undo_tiles, FALSE);
}
gdisplay_set_menu_sensitivity (image_map->gdisp);
g_free (image_map);
}
void
image_map_clear (ImageMap *image_map)
{
PixelRegion srcPR, destPR;
g_return_if_fail (image_map != NULL);
if (image_map->state == IMAGE_MAP_WORKING)
{
g_source_remove (image_map->idle_id);
image_map->idle_id = 0;
pixel_regions_process_stop (image_map->PRI);
image_map->PRI = NULL;
}
image_map->state = IMAGE_MAP_WAITING;
/* Make sure the drawable is still valid */
if (! gimp_drawable_gimage (image_map->drawable))
return;
/* restore the original image */
if (image_map->undo_tiles)
{
gint offset_x;
gint offset_y;
gint width;
gint height;
tile_manager_get_offsets (image_map->undo_tiles, &offset_x, &offset_y);
width = tile_manager_width (image_map->undo_tiles);
height = tile_manager_height (image_map->undo_tiles),
/* Copy from the drawable to the tiles */
pixel_region_init (&srcPR, image_map->undo_tiles,
0, 0, width, height, FALSE);
pixel_region_init (&destPR,
gimp_drawable_data (image_map->drawable),
offset_x, offset_y, width, height, TRUE);
/* if the user has changed the image depth get out quickly */
if (destPR.bytes != srcPR.bytes)
{
g_message ("image depth change, unable to restore original image");
tile_manager_destroy (image_map->undo_tiles);
gimp_image_undo_thaw (image_map->gdisp->gimage);
gdisplay_set_menu_sensitivity (image_map->gdisp);
g_free (image_map);
return;
}
copy_region (&srcPR, &destPR);
/* Update the area */
gimp_drawable_update (image_map->drawable,
offset_x, offset_y,
width, height);
/* Free the undo_tiles tile manager */
tile_manager_destroy (image_map->undo_tiles);
image_map->undo_tiles = NULL;
}
}
void
image_map_abort (ImageMap *image_map)
{
g_return_if_fail (image_map != NULL);
image_map_clear (image_map);
gimp_image_undo_thaw (image_map->gdisp->gimage);
gdisplay_set_menu_sensitivity (image_map->gdisp);
g_free (image_map);
}
guchar *
image_map_get_color_at (ImageMap *image_map,
gint x,
gint y)
{
Tile *tile;
guchar *src;
guchar *dest;
g_return_val_if_fail (image_map != NULL, NULL);
if (x >= 0 && x < gimp_drawable_width (image_map->drawable) &&
y >= 0 && y < gimp_drawable_height (image_map->drawable))
{
/* Check if done damage to original image */
if (! image_map->undo_tiles)
return (gimp_drawable_get_color_at (image_map->drawable, x, y));
if (! image_map ||
(! gimp_drawable_gimage (image_map->drawable) &&
gimp_drawable_is_indexed (image_map->drawable)) ||
x < 0 || y < 0 ||
x >= tile_manager_width (image_map->undo_tiles) ||
y >= tile_manager_height (image_map->undo_tiles))
{
return NULL;
}
dest = g_new (guchar, 5);
tile = tile_manager_get_tile (image_map->undo_tiles, x, y,
TRUE, FALSE);
src = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
gimp_image_get_color (gimp_drawable_gimage (image_map->drawable),
gimp_drawable_type (image_map->drawable),
dest, src);
if (GIMP_IMAGE_TYPE_HAS_ALPHA (gimp_drawable_type (image_map->drawable)))
dest[3] = src[gimp_drawable_bytes (image_map->drawable) - 1];
else
dest[3] = 255;
if (gimp_drawable_is_indexed (image_map->drawable))
dest[4] = src[0];
else
dest[4] = 0;
tile_release (tile, FALSE);
return dest;
}
else /* out of bounds error */
{
return NULL;
}
}
/* private functions */
static gboolean
image_map_do (gpointer data)
{
ImageMap *image_map;
GimpImage *gimage;
PixelRegion shadowPR;
gint x, y, w, h;
image_map = (ImageMap *) data;
if (! (gimage = gimp_drawable_gimage (image_map->drawable)))
{
image_map->state = IMAGE_MAP_WAITING;
return FALSE;
}
/* Process the pixel regions and apply the image mapping */
(* image_map->apply_func) (&image_map->srcPR,
&image_map->destPR,
image_map->user_data);
x = image_map->destPR.x;
y = image_map->destPR.y;
w = image_map->destPR.w;
h = image_map->destPR.h;
/* apply the results */
pixel_region_init (&shadowPR, gimage->shadow, x, y, w, h, FALSE);
gimp_image_apply_image (gimage, image_map->drawable, &shadowPR,
FALSE, OPAQUE_OPACITY, REPLACE_MODE, NULL, x, y);
/* display the results */
if (image_map->gdisp)
{
gimp_drawable_update (image_map->drawable,
x, y,
w, h);
gdisplay_flush_now (image_map->gdisp);
}
image_map->PRI = pixel_regions_process (image_map->PRI);
if (image_map->PRI == NULL)
{
image_map->state = IMAGE_MAP_WAITING;
gdisplays_flush ();
return FALSE;
}
return TRUE;
}