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gimp/app/core/gimpimagemap.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 "config.h"
#include <glib-object.h>
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "base/tile.h"
#include "paint-funcs/paint-funcs.h"
#include "gimpdrawable.h"
#include "gimpimage.h"
#include "gimpimagemap.h"
#include "gimpmarshal.h"
#include "gimppickable.h"
enum
{
FLUSH,
LAST_SIGNAL
};
struct _GimpImageMap
{
GimpObject parent_instance;
GimpDrawable *drawable;
gchar *undo_desc;
TileManager *undo_tiles;
gint undo_offset_x;
gint undo_offset_y;
GimpImageMapApplyFunc apply_func;
gpointer user_data;
PixelRegion srcPR;
PixelRegion destPR;
PixelRegionIterator *PRI;
guint idle_id;
};
static void gimp_image_map_pickable_iface_init (GimpPickableInterface *iface);
static void gimp_image_map_finalize (GObject *object);
static GimpImage * gimp_image_map_get_image (GimpPickable *pickable);
static GimpImageType gimp_image_map_get_image_type (GimpPickable *pickable);
static gint gimp_image_map_get_bytes (GimpPickable *pickable);
static TileManager * gimp_image_map_get_tiles (GimpPickable *pickable);
static guchar * gimp_image_map_get_color_at (GimpPickable *pickable,
gint x,
gint y);
static gboolean gimp_image_map_do (GimpImageMap *image_map);
G_DEFINE_TYPE_WITH_CODE (GimpImageMap, gimp_image_map, GIMP_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PICKABLE,
gimp_image_map_pickable_iface_init))
#define parent_class gimp_image_map_parent_class
static guint image_map_signals[LAST_SIGNAL] = { 0 };
static void
gimp_image_map_class_init (GimpImageMapClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
image_map_signals[FLUSH] =
g_signal_new ("flush",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageMapClass, flush),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_image_map_finalize;
}
static void
gimp_image_map_init (GimpImageMap *image_map)
{
image_map->drawable = NULL;
image_map->undo_tiles = NULL;
image_map->undo_offset_x = 0;
image_map->undo_offset_y = 0;
image_map->apply_func = NULL;
image_map->user_data = NULL;
image_map->PRI = NULL;
image_map->idle_id = 0;
}
static void
gimp_image_map_pickable_iface_init (GimpPickableInterface *iface)
{
iface->get_image = gimp_image_map_get_image;
iface->get_image_type = gimp_image_map_get_image_type;
iface->get_bytes = gimp_image_map_get_bytes;
iface->get_tiles = gimp_image_map_get_tiles;
iface->get_color_at = gimp_image_map_get_color_at;
}
static void
gimp_image_map_finalize (GObject *object)
{
GimpImageMap *image_map = GIMP_IMAGE_MAP (object);
if (image_map->undo_desc)
{
g_free (image_map->undo_desc);
image_map->undo_desc = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GimpImage *
gimp_image_map_get_image (GimpPickable *pickable)
{
GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
return gimp_pickable_get_image (GIMP_PICKABLE (image_map->drawable));
}
static GimpImageType
gimp_image_map_get_image_type (GimpPickable *pickable)
{
GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
return gimp_pickable_get_image_type (GIMP_PICKABLE (image_map->drawable));
}
static gint
gimp_image_map_get_bytes (GimpPickable *pickable)
{
GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
return gimp_pickable_get_bytes (GIMP_PICKABLE (image_map->drawable));
}
static TileManager *
gimp_image_map_get_tiles (GimpPickable *pickable)
{
GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
if (image_map->undo_tiles)
return image_map->undo_tiles;
else
return gimp_pickable_get_tiles (GIMP_PICKABLE (image_map->drawable));
}
static guchar *
gimp_image_map_get_color_at (GimpPickable *pickable,
gint x,
gint y)
{
GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
guchar src[5];
guchar *dest;
if (x >= 0 && x < gimp_item_width (GIMP_ITEM (image_map->drawable)) &&
y >= 0 && y < gimp_item_height (GIMP_ITEM (image_map->drawable)))
{
/* Check if done damage to original image */
if (! image_map->undo_tiles)
return gimp_pickable_get_color_at (GIMP_PICKABLE (image_map->drawable),
x, y);
if ((! gimp_item_get_image (GIMP_ITEM (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);
read_pixel_data_1 (image_map->undo_tiles, x, y, src);
gimp_image_get_color (gimp_item_get_image (GIMP_ITEM (image_map->drawable)),
gimp_drawable_type (image_map->drawable),
src, dest);
if (gimp_drawable_is_indexed (image_map->drawable))
dest[4] = src[0];
else
dest[4] = 0;
return dest;
}
else /* out of bounds error */
{
return NULL;
}
}
GimpImageMap *
gimp_image_map_new (GimpDrawable *drawable,
const gchar *undo_desc)
{
GimpImageMap *image_map;
GimpImage *image;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
image = gimp_item_get_image (GIMP_ITEM (drawable));
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
image_map = g_object_new (GIMP_TYPE_IMAGE_MAP, NULL);
image_map->drawable = drawable;
image_map->undo_desc = g_strdup (undo_desc);
return image_map;
}
void
gimp_image_map_apply (GimpImageMap *image_map,
GimpImageMapApplyFunc apply_func,
gpointer apply_data)
{
gint x, y;
gint width, height;
gint undo_offset_x, undo_offset_y;
gint undo_width, undo_height;
g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
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->idle_id)
{
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_item_get_image (GIMP_ITEM (image_map->drawable)))
return;
/* The application should occur only within selection bounds */
if (! gimp_drawable_mask_intersect (image_map->drawable,
&x, &y, &width, &height))
return;
/* If undo tiles don't exist, or change size, (re)allocate */
if (image_map->undo_tiles)
{
undo_offset_x = image_map->undo_offset_x;
undo_offset_y = image_map->undo_offset_y;
undo_width = tile_manager_width (image_map->undo_tiles);
undo_height = tile_manager_height (image_map->undo_tiles);
}
else
{
undo_offset_x = 0;
undo_offset_y = 0;
undo_width = 0;
undo_height = 0;
}
if (! image_map->undo_tiles ||
undo_offset_x != x ||
undo_offset_y != y ||
undo_width != width ||
undo_height != height)
{
/* If either the extents changed or the tiles don't exist,
* allocate new
*/
if (! image_map->undo_tiles ||
undo_width != width ||
undo_height != height)
{
/* Destroy old tiles */
if (image_map->undo_tiles)
tile_manager_unref (image_map->undo_tiles);
/* Allocate new tiles */
image_map->undo_tiles =
tile_manager_new (width, height,
gimp_drawable_bytes (image_map->drawable));
}
/* Copy from the image to the new tiles */
pixel_region_init (&image_map->srcPR,
gimp_drawable_get_tiles (image_map->drawable),
x, y, width, height, FALSE);
pixel_region_init (&image_map->destPR, image_map->undo_tiles,
0, 0, width, height, TRUE);
copy_region (&image_map->srcPR, &image_map->destPR);
/* Set the offsets */
image_map->undo_offset_x = x;
image_map->undo_offset_y = y;
}
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, undo_width, undo_height, FALSE);
pixel_region_init (&image_map->destPR,
gimp_drawable_get_tiles (image_map->drawable),
undo_offset_x, undo_offset_y,
undo_width, undo_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, width, height, FALSE);
/* Configure the dest as the shadow buffer */
pixel_region_init (&image_map->destPR,
gimp_drawable_get_shadow_tiles (image_map->drawable),
x, y, width, height, 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->idle_id = g_idle_add ((GSourceFunc) gimp_image_map_do, image_map);
}
void
gimp_image_map_commit (GimpImageMap *image_map)
{
GimpImage *image;
gint x1, y1, x2, y2;
g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
if (image_map->idle_id)
{
g_source_remove (image_map->idle_id);
image_map->idle_id = 0;
/* Finish the changes */
while (gimp_image_map_do (image_map));
}
/* Make sure the drawable is still valid */
image = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! image)
return;
/* Register an undo step */
if (image_map->undo_tiles)
{
x1 = image_map->undo_offset_x;
y1 = image_map->undo_offset_y;
x2 = x1 + tile_manager_width (image_map->undo_tiles);
y2 = y1 + tile_manager_height (image_map->undo_tiles);
gimp_drawable_push_undo (image_map->drawable,
image_map->undo_desc,
x1, y1, x2, y2,
image_map->undo_tiles, FALSE);
tile_manager_unref (image_map->undo_tiles);
image_map->undo_tiles = NULL;
}
g_object_unref (image_map);
}
void
gimp_image_map_clear (GimpImageMap *image_map)
{
GimpImage *image;
PixelRegion srcPR, destPR;
g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
if (image_map->idle_id)
{
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 */
image = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! image)
return;
/* restore the original image */
if (image_map->undo_tiles)
{
gint offset_x;
gint offset_y;
gint width;
gint height;
offset_x = image_map->undo_offset_x;
offset_y = image_map->undo_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_get_tiles (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_unref (image_map->undo_tiles);
image_map->undo_tiles = NULL;
g_object_unref (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_unref (image_map->undo_tiles);
image_map->undo_tiles = NULL;
}
}
void
gimp_image_map_abort (GimpImageMap *image_map)
{
GimpImage *image;
g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
image = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! image)
return;
gimp_image_map_clear (image_map);
g_object_unref (image_map);
}
/* private functions */
static gboolean
gimp_image_map_do (GimpImageMap *image_map)
{
GimpImage *image;
PixelRegion shadowPR;
gint i;
image = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! image)
{
image_map->idle_id = 0;
return FALSE;
}
/* Process up to 16 tiles in one go. This reduces the overhead
* caused by updating the display while the imagemap is being
* applied and gives us a tiny speedup.
*/
for (i = 0; i < 16; i++)
{
gint x, y, w, h;
image_map->apply_func (image_map->user_data,
&image_map->srcPR, &image_map->destPR);
x = image_map->destPR.x;
y = image_map->destPR.y;
w = image_map->destPR.w;
h = image_map->destPR.h;
pixel_region_init (&shadowPR, image->shadow, x, y, w, h, FALSE);
gimp_drawable_apply_region (image_map->drawable, &shadowPR,
FALSE, NULL,
GIMP_OPACITY_OPAQUE, GIMP_REPLACE_MODE,
NULL,
x, y);
gimp_drawable_update (image_map->drawable, x, y, w, h);
image_map->PRI = pixel_regions_process (image_map->PRI);
if (image_map->PRI == NULL)
{
image_map->idle_id = 0;
gimp_image_flush (image);
return FALSE;
}
}
g_signal_emit (image_map, image_map_signals[FLUSH], 0);
return TRUE;
}
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