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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"
enum
{
FLUSH,
LAST_SIGNAL
};
struct _GimpImageMap
{
GimpObject parent_instance;
gboolean interactive;
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_class_init (GimpImageMapClass *klass);
static void gimp_image_map_init (GimpImageMap *image_map);
static void gimp_image_map_finalize (GObject *object);
static gboolean gimp_image_map_do (GimpImageMap *image_map);
static guint image_map_signals[LAST_SIGNAL] = { 0 };
static GimpObjectClass *parent_class = NULL;
GType
gimp_image_map_get_type (void)
{
static GType image_map_type = 0;
if (! image_map_type)
{
static const GTypeInfo image_map_info =
{
sizeof (GimpImageMapClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_image_map_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpImageMap),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_image_map_init,
};
image_map_type = g_type_register_static (GIMP_TYPE_OBJECT,
"GimpImageMap",
&image_map_info, 0);
}
return image_map_type;
}
static void
gimp_image_map_class_init (GimpImageMapClass *klass)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (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_finalize (GObject *object)
{
GimpImageMap *image_map;
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);
}
GimpImageMap *
gimp_image_map_new (gboolean interactive,
GimpDrawable *drawable,
const gchar *undo_desc)
{
GimpImageMap *image_map;
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
image_map = g_object_new (GIMP_TYPE_IMAGE_MAP, NULL);
image_map->interactive = interactive ? TRUE : FALSE;
image_map->drawable = drawable;
image_map->undo_desc = g_strdup (undo_desc);
/* Interactive tools based on image_map disable the undo stack
* to avert any unintented undo interaction through the UI
*/
gimp_image_undo_freeze (gimage);
return image_map;
}
void
gimp_image_map_apply (GimpImageMap *image_map,
GimpImageMapApplyFunc apply_func,
gpointer apply_data)
{
gint x1, y1;
gint x2, y2;
gint offset_x, offset_y;
gint width, 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 */
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)
{
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);
}
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 (image_map->undo_tiles)
tile_manager_unref (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 */
image_map->undo_offset_x = x1;
image_map->undo_offset_y = 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->idle_id = g_idle_add ((GSourceFunc) gimp_image_map_do,
image_map);
}
void
gimp_image_map_commit (GimpImageMap *image_map)
{
GimpImage *gimage;
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 */
gimage = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! gimage)
return;
/* Interactive phase ends: we can commit an undo frame now */
gimp_image_undo_thaw (gimage);
/* 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 *gimage;
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 */
gimage = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! gimage)
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_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_unref (image_map->undo_tiles);
gimp_image_undo_thaw (gimage);
#if 0
gimp_display_shell_set_menu_sensitivity (GIMP_DISPLAY_SHELL (image_map->gdisp->shell),
image_map->gdisp->gimage->gimp);
#endif
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 *gimage;
g_return_if_fail (GIMP_IS_IMAGE_MAP (image_map));
gimage = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! gimage)
return;
gimp_image_map_clear (image_map);
gimp_image_undo_thaw (gimage);
g_object_unref (image_map);
}
guchar *
gimp_image_map_get_color_at (GimpImageMap *image_map,
gint x,
gint y)
{
guchar src[5];
guchar *dest;
g_return_val_if_fail (GIMP_IS_IMAGE_MAP (image_map), NULL);
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_drawable_get_color_at (image_map->drawable, x, y);
if (! image_map ||
(! 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_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;
return dest;
}
else /* out of bounds error */
{
return NULL;
}
}
/* private functions */
static gboolean
gimp_image_map_do (GimpImageMap *image_map)
{
GimpImage *gimage;
PixelRegion shadowPR;
gint x, y, w, h;
gimage = gimp_item_get_image (GIMP_ITEM (image_map->drawable));
if (! gimage)
{
image_map->idle_id = 0;
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_drawable_apply_region (image_map->drawable, &shadowPR,
FALSE, NULL,
GIMP_OPACITY_OPAQUE, GIMP_REPLACE_MODE,
NULL,
x, y);
/* display the results */
gimp_drawable_update (image_map->drawable, x, y, w, h);
if (image_map->interactive)
g_signal_emit (image_map, image_map_signals[FLUSH], 0);
image_map->PRI = pixel_regions_process (image_map->PRI);
if (image_map->PRI == NULL)
{
image_map->idle_id = 0;
if (image_map->interactive)
gimp_image_flush (gimage);
return FALSE;
}
return TRUE;
}
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