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Gimp/app/core/gimpdrawable.c
Michael Natterer 7a5f914866 To optimize duplicate and/or wrong image updates away, introduced new 
2003-09-06  Michael Natterer  <mitch@gimp.org>

	To optimize duplicate and/or wrong image updates away, introduced
	new policy that a child object must never explicitly update or
	invalidate its parent object (just like the GUI is not updated
	explicitly by the core):

	* app/core/gimpdrawable.[ch]: added new signal
	GimpDrawable::update(). Never update or invalidate the image when
	the drawable is updated or invalidated.

	(gimp_drawable_set_visible): don't gimp_drawable_update() the
	drawable since its pixels have not changed.

	* app/core/gimpimage.[ch]: connect to the "add" and "remove"
	signals of the layers and channels containers. Also connect to the
	"update" and "visibility_changed" signals of all drawables in
	these containers (optimizes away updates issued by drawables which
	are not yet added to the image and updates of the selection
	mask). Also, don't propagate updates to the image if the emitting
	drawable is invisible (optimizes away updates issued by invisible
	drawables).

	(gimp_image_add_layer,channel)
	(gimp_image_remove_layer,channel): don't update the image since
	that's done by our "add" and "remove" handlers now.

	(gimp_image_position_layer,channel): update just the image, not
	the drawable since its pixels have not changed.

	(gimp_image_real_colormap_changed)
	(gimp_image_set_component_visible): always call
	gimp_image_update() *and* gimp_viewable_invalidate_preview() to
	get everything updated, since update and invalidate of images are
	not connected.

	* app/core/gimpimage-undo-push.c (undo_pop_layer,channel): don't
	update the drawable since (a) its pixels don't change and (b) the
	image updates itself upon adding/removing now.

	(undo_pop_layer_mod): replaced gimp_image_update() by
	gimp_drawable_update() (just for consistency with other similar
	functions).

	* app/core/gimplayer.c: connect to "update" of the layer mask and
	issue updates on the layer if the mask update has any effect on
	the projection.
	(gimp_layer_create_mask): don't set the mask's offsets here since
	they may be different when we later add the mask to the layer.

	* app/core/gimplayermask.c (gimp_layer_mask_set_layer): set the
	mask offsets here instead.

	* app/core/gimpchannel.c (gimp_channel_translate): update the
	channel even if push_undo == FALSE.

	* app/paint/gimppaintcore.c (gimp_paint_core_finish)
	* app/tools/gimpinktool.c (ink_finish): invalidate both the
	drawable and the image preview since invalidating the drawable
	doesn't invalidate the image any more.

	* app/text/gimptextlayer.c (gimp_text_layer_render_now): also
	update the new extents of the text layer, not only the old one.

	(gimp_text_layer_render_layout): don't update the drawable since
	gimp_drawable_fill() already updated it.
2003-09-06 20:06:53 +00:00

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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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <glib-object.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/tile.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "gimp.h"
#include "gimp-utils.h"
#include "gimpchannel.h"
#include "gimpcontext.h"
#include "gimpdrawable.h"
#include "gimpdrawable-preview.h"
#include "gimpdrawable-transform.h"
#include "gimpimage.h"
#include "gimpimage-undo-push.h"
#include "gimplayer.h"
#include "gimplist.h"
#include "gimpmarshal.h"
#include "gimpparasitelist.h"
#include "gimppreviewcache.h"
#include "gimp-intl.h"
enum
{
UPDATE,
VISIBILITY_CHANGED,
ALPHA_CHANGED,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_drawable_class_init (GimpDrawableClass *klass);
static void gimp_drawable_init (GimpDrawable *drawable);
static void gimp_drawable_finalize (GObject *object);
static gsize gimp_drawable_get_memsize (GimpObject *object,
gsize *gui_size);
static void gimp_drawable_invalidate_preview (GimpViewable *viewable);
static GimpItem * gimp_drawable_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha);
static void gimp_drawable_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type);
static void gimp_drawable_resize (GimpItem *item,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void gimp_drawable_flip (GimpItem *item,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_drawable_rotate (GimpItem *item,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void gimp_drawable_transform (GimpItem *item,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gboolean clip_result,
GimpProgressFunc progress_callback,
gpointer progress_data);
static void gimp_drawable_real_update (GimpDrawable *drawable,
gint x,
gint y,
gint width,
gint height);
/* private variables */
static guint gimp_drawable_signals[LAST_SIGNAL] = { 0 };
static GimpItemClass *parent_class = NULL;
GType
gimp_drawable_get_type (void)
{
static GType drawable_type = 0;
if (! drawable_type)
{
static const GTypeInfo drawable_info =
{
sizeof (GimpDrawableClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_drawable_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpDrawable),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_drawable_init,
};
drawable_type = g_type_register_static (GIMP_TYPE_ITEM,
"GimpDrawable",
&drawable_info, 0);
}
return drawable_type;
}
static void
gimp_drawable_class_init (GimpDrawableClass *klass)
{
GObjectClass *object_class;
GimpObjectClass *gimp_object_class;
GimpViewableClass *viewable_class;
GimpItemClass *item_class;
object_class = G_OBJECT_CLASS (klass);
gimp_object_class = GIMP_OBJECT_CLASS (klass);
viewable_class = GIMP_VIEWABLE_CLASS (klass);
item_class = GIMP_ITEM_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
gimp_drawable_signals[UPDATE] =
g_signal_new ("update",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpDrawableClass, update),
NULL, NULL,
gimp_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
gimp_drawable_signals[VISIBILITY_CHANGED] =
g_signal_new ("visibility_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpDrawableClass, visibility_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_drawable_signals[ALPHA_CHANGED] =
g_signal_new ("alpha_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpDrawableClass, alpha_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_drawable_finalize;
gimp_object_class->get_memsize = gimp_drawable_get_memsize;
viewable_class->invalidate_preview = gimp_drawable_invalidate_preview;
viewable_class->get_preview_size = gimp_drawable_get_preview_size;
viewable_class->get_popup_size = gimp_drawable_get_popup_size;
viewable_class->get_preview = gimp_drawable_get_preview;
item_class->duplicate = gimp_drawable_duplicate;
item_class->scale = gimp_drawable_scale;
item_class->resize = gimp_drawable_resize;
item_class->flip = gimp_drawable_flip;
item_class->rotate = gimp_drawable_rotate;
item_class->transform = gimp_drawable_transform;
klass->update = gimp_drawable_real_update;
klass->visibility_changed = NULL;
klass->alpha_changed = NULL;
klass->invalidate_boundary = NULL;
}
static void
gimp_drawable_init (GimpDrawable *drawable)
{
drawable->tiles = NULL;
drawable->visible = FALSE;
drawable->bytes = 0;
drawable->type = -1;
drawable->has_alpha = FALSE;
drawable->preview_cache = NULL;
drawable->preview_valid = FALSE;
}
static void
gimp_drawable_finalize (GObject *object)
{
GimpDrawable *drawable = GIMP_DRAWABLE (object);
if (drawable->tiles)
{
tile_manager_unref (drawable->tiles);
drawable->tiles = NULL;
}
if (drawable->preview_cache)
gimp_preview_cache_invalidate (&drawable->preview_cache);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gsize
gimp_drawable_get_memsize (GimpObject *object,
gsize *gui_size)
{
GimpDrawable *drawable;
gsize memsize = 0;
drawable = GIMP_DRAWABLE (object);
if (drawable->tiles)
memsize += tile_manager_get_memsize (drawable->tiles);
if (drawable->preview_cache)
*gui_size += gimp_preview_cache_get_memsize (drawable->preview_cache);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
gimp_drawable_invalidate_preview (GimpViewable *viewable)
{
GimpDrawable *drawable;
if (GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview)
GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable);
drawable = GIMP_DRAWABLE (viewable);
drawable->preview_valid = FALSE;
if (drawable->preview_cache)
gimp_preview_cache_invalidate (&drawable->preview_cache);
}
static GimpItem *
gimp_drawable_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha)
{
GimpDrawable *drawable;
GimpItem *new_item;
GimpDrawable *new_drawable;
GimpImageType new_image_type;
PixelRegion srcPR;
PixelRegion destPR;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL);
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type,
add_alpha);
if (! GIMP_IS_DRAWABLE (new_item))
return new_item;
drawable = GIMP_DRAWABLE (item);
new_drawable = GIMP_DRAWABLE (new_item);
if (add_alpha)
new_image_type = gimp_drawable_type_with_alpha (drawable);
else
new_image_type = gimp_drawable_type (drawable);
gimp_drawable_configure (new_drawable,
gimp_item_get_image (GIMP_ITEM (drawable)),
item->offset_x,
item->offset_y,
item->width,
item->height,
new_image_type,
GIMP_OBJECT (new_drawable)->name);
new_drawable->visible = drawable->visible;
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
item->width,
item->height,
FALSE);
pixel_region_init (&destPR, new_drawable->tiles,
0, 0,
new_item->width,
new_item->height,
TRUE);
if (new_image_type == drawable->type)
copy_region (&srcPR, &destPR);
else
add_alpha_region (&srcPR, &destPR);
return new_item;
}
static void
gimp_drawable_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type)
{
GimpDrawable *drawable;
PixelRegion srcPR, destPR;
TileManager *new_tiles;
drawable = GIMP_DRAWABLE (item);
/* Update the old position */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
/* Allocate the new channel */
new_tiles = tile_manager_new (new_width, new_height, drawable->bytes);
/* Configure the pixel regions */
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
item->width,
item->height,
FALSE);
pixel_region_init (&destPR, new_tiles,
0, 0,
new_width, new_height,
TRUE);
/* Scale the drawable -
* If the drawable is indexed, then we don't use pixel-value
* resampling because that doesn't necessarily make sense for indexed
* images.
*/
scale_region (&srcPR, &destPR,
gimp_drawable_is_indexed (drawable) ?
GIMP_INTERPOLATION_NONE : interpolation_type);
tile_manager_unref (drawable->tiles);
drawable->tiles = new_tiles;
GIMP_ITEM_CLASS (parent_class)->scale (item, new_width, new_height,
new_offset_x, new_offset_y,
interpolation_type);
/* Update the new position */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
gimp_viewable_size_changed (GIMP_VIEWABLE (drawable));
}
static void
gimp_drawable_resize (GimpItem *item,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GimpDrawable *drawable;
PixelRegion srcPR, destPR;
TileManager *new_tiles;
gint new_offset_x;
gint new_offset_y;
gint copy_x, copy_y;
gint copy_width, copy_height;
drawable = GIMP_DRAWABLE (item);
new_offset_x = item->offset_x - offset_x;
new_offset_y = item->offset_y - offset_y;
gimp_rectangle_intersect (item->offset_x, item->offset_y,
item->width, item->height,
new_offset_x, new_offset_y,
new_width, new_height,
&copy_x, &copy_y,
&copy_width, &copy_height);
/* Update the old position */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
/* Allocate the new tile manager, configure dest region */
new_tiles = tile_manager_new (new_width, new_height,
drawable->bytes);
/* Determine whether the new tiles need to be initially cleared */
if (copy_width != new_width ||
copy_height != new_height)
{
guchar bg[MAX_CHANNELS] = { 0, };
pixel_region_init (&destPR, new_tiles,
0, 0,
new_width, new_height,
TRUE);
if (! gimp_drawable_has_alpha (drawable) && ! GIMP_IS_CHANNEL (drawable))
gimp_image_get_background (gimp_item_get_image (item), drawable, bg);
color_region (&destPR, bg);
}
/* Determine whether anything needs to be copied */
if (copy_width && copy_height)
{
pixel_region_init (&srcPR, drawable->tiles,
copy_x - item->offset_x, copy_y - item->offset_y,
copy_width, copy_height,
FALSE);
pixel_region_init (&destPR, new_tiles,
copy_x - new_offset_x, copy_y - new_offset_y,
copy_width, copy_height,
TRUE);
copy_region (&srcPR, &destPR);
}
tile_manager_unref (drawable->tiles);
drawable->tiles = new_tiles;
GIMP_ITEM_CLASS (parent_class)->resize (item, new_width, new_height,
offset_x, offset_y);
/* update the new area */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
gimp_viewable_size_changed (GIMP_VIEWABLE (drawable));
}
static void
gimp_drawable_flip (GimpItem *item,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpDrawable *drawable;
TileManager *tiles;
gint off_x, off_y;
gint old_off_x, old_off_y;
drawable = GIMP_DRAWABLE (item);
gimp_item_offsets (item, &off_x, &off_y);
tile_manager_get_offsets (drawable->tiles, &old_off_x, &old_off_y);
tile_manager_set_offsets (drawable->tiles, off_x, off_y);
tiles = gimp_drawable_transform_tiles_flip (drawable,
drawable->tiles,
flip_type, axis,
clip_result);
tile_manager_set_offsets (drawable->tiles, old_off_x, old_off_y);
if (tiles)
{
gimp_drawable_transform_paste (drawable, tiles, FALSE);
tile_manager_unref (tiles);
}
}
static void
gimp_drawable_rotate (GimpItem *item,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpDrawable *drawable;
TileManager *tiles;
gint off_x, off_y;
gint old_off_x, old_off_y;
drawable = GIMP_DRAWABLE (item);
gimp_item_offsets (item, &off_x, &off_y);
tile_manager_get_offsets (drawable->tiles, &old_off_x, &old_off_y);
tile_manager_set_offsets (drawable->tiles, off_x, off_y);
tiles = gimp_drawable_transform_tiles_rotate (drawable,
drawable->tiles,
rotate_type, center_x, center_y,
clip_result);
tile_manager_set_offsets (drawable->tiles, old_off_x, old_off_y);
if (tiles)
{
gimp_drawable_transform_paste (drawable, tiles, FALSE);
tile_manager_unref (tiles);
}
}
static void
gimp_drawable_transform (GimpItem *item,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gboolean clip_result,
GimpProgressFunc progress_callback,
gpointer progress_data)
{
GimpDrawable *drawable;
TileManager *tiles;
gint off_x, off_y;
gint old_off_x, old_off_y;
drawable = GIMP_DRAWABLE (item);
gimp_item_offsets (item, &off_x, &off_y);
tile_manager_get_offsets (drawable->tiles, &old_off_x, &old_off_y);
tile_manager_set_offsets (drawable->tiles, off_x, off_y);
tiles = gimp_drawable_transform_tiles_affine (drawable,
drawable->tiles,
matrix, direction,
interpolation_type,
clip_result,
progress_callback,
progress_data);
tile_manager_set_offsets (drawable->tiles, old_off_x, old_off_y);
if (tiles)
{
gimp_drawable_transform_paste (drawable, tiles, FALSE);
tile_manager_unref (tiles);
}
}
static void
gimp_drawable_real_update (GimpDrawable *drawable,
gint x,
gint y,
gint width,
gint height)
{
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (drawable));
}
void
gimp_drawable_configure (GimpDrawable *drawable,
GimpImage *gimage,
gint offset_x,
gint offset_y,
gint width,
gint height,
GimpImageType type,
const gchar *name)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimp_item_configure (GIMP_ITEM (drawable), gimage,
offset_x, offset_y, width, height, name);
drawable->type = type;
drawable->bytes = GIMP_IMAGE_TYPE_BYTES (type);
drawable->has_alpha = GIMP_IMAGE_TYPE_HAS_ALPHA (type);
if (drawable->tiles)
tile_manager_unref (drawable->tiles);
drawable->tiles = tile_manager_new (width, height, drawable->bytes);
drawable->visible = TRUE;
/* preview variables */
drawable->preview_cache = NULL;
drawable->preview_valid = FALSE;
}
void
gimp_drawable_update (GimpDrawable *drawable,
gint x,
gint y,
gint width,
gint height)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_signal_emit (drawable, gimp_drawable_signals[UPDATE], 0,
x, y, width, height);
}
void
gimp_drawable_push_undo (GimpDrawable *drawable,
const gchar *undo_desc,
gint x1,
gint y1,
gint x2,
gint y2,
TileManager *tiles,
gboolean sparse)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (! tiles)
gimp_image_undo_push_image (gimp_item_get_image (GIMP_ITEM (drawable)),
undo_desc,
drawable,
x1, y1, x2, y2);
else
gimp_image_undo_push_image_mod (gimp_item_get_image (GIMP_ITEM (drawable)),
undo_desc,
drawable,
x1, y1, x2, y2,
tiles, sparse);
}
void
gimp_drawable_merge_shadow (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc)
{
GimpImage *gimage;
PixelRegion shadowPR;
gint x1, y1, x2, y2;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (gimage->shadow != NULL);
/* A useful optimization here is to limit the update to the
* extents of the selection mask, as it cannot extend beyond
* them.
*/
gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
pixel_region_init (&shadowPR, gimage->shadow, x1, y1,
(x2 - x1), (y2 - y1), FALSE);
gimp_image_apply_image (gimage, drawable, &shadowPR,
push_undo, undo_desc,
GIMP_OPACITY_OPAQUE, GIMP_REPLACE_MODE,
NULL, x1, y1);
}
void
gimp_drawable_fill (GimpDrawable *drawable,
const GimpRGB *color)
{
GimpItem *item;
GimpImage *gimage;
GimpImageType drawable_type;
PixelRegion destPR;
guchar c[MAX_CHANNELS];
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
g_return_if_fail (gimage != NULL);
drawable_type = gimp_drawable_type (drawable);
gimp_rgba_get_uchar (color,
&c[RED_PIX],
&c[GREEN_PIX],
&c[BLUE_PIX],
&c[ALPHA_PIX]);
switch (GIMP_IMAGE_TYPE_BASE_TYPE (drawable_type))
{
case GIMP_RGB:
if (drawable_type != GIMP_RGBA_IMAGE)
c[ALPHA_PIX] = OPAQUE_OPACITY;
break;
case GIMP_GRAY:
c[GRAY_PIX] = INTENSITY (c[RED_PIX],
c[GREEN_PIX],
c[BLUE_PIX]);
c[ALPHA_G_PIX] = c[ALPHA_PIX];
if (drawable_type != GIMP_GRAYA_IMAGE)
c[ALPHA_G_PIX] = OPAQUE_OPACITY;
break;
case GIMP_INDEXED:
{
guchar index;
gimp_image_transform_color (gimage, drawable, &index, GIMP_RGB, c);
c[INDEXED_PIX] = index;
c[ALPHA_I_PIX] = c[ALPHA_PIX];
if (drawable_type != GIMP_INDEXEDA_IMAGE)
c[ALPHA_I_PIX] = OPAQUE_OPACITY;
}
break;
default:
g_warning ("%s: Cannot fill unknown image type.",
G_GNUC_PRETTY_FUNCTION);
break;
}
pixel_region_init (&destPR, gimp_drawable_data (drawable),
0, 0, gimp_item_width (item), gimp_item_height (item),
TRUE);
color_region (&destPR, c);
gimp_drawable_update (drawable,
0, 0,
gimp_item_width (item),
gimp_item_height (item));
}
void
gimp_drawable_fill_by_type (GimpDrawable *drawable,
GimpContext *context,
GimpFillType fill_type)
{
GimpRGB color;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
switch (fill_type)
{
case GIMP_FOREGROUND_FILL:
gimp_context_get_foreground (context, &color);
break;
case GIMP_BACKGROUND_FILL:
gimp_context_get_background (context, &color);
break;
case GIMP_WHITE_FILL:
gimp_rgba_set (&color, 1.0, 1.0, 1.0, GIMP_OPACITY_OPAQUE);
break;
case GIMP_TRANSPARENT_FILL:
gimp_rgba_set (&color, 0.0, 0.0, 0.0, GIMP_OPACITY_TRANSPARENT);
break;
case GIMP_NO_FILL:
return;
default:
g_warning ("%s: unknown fill type %d", G_GNUC_PRETTY_FUNCTION, fill_type);
return;
}
gimp_drawable_fill (drawable, &color);
}
gboolean
gimp_drawable_mask_bounds (GimpDrawable *drawable,
gint *x1,
gint *y1,
gint *x2,
gint *y2)
{
GimpItem *item;
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
g_return_val_if_fail (x1 != NULL, FALSE);
g_return_val_if_fail (y1 != NULL, FALSE);
g_return_val_if_fail (x2 != NULL, FALSE);
g_return_val_if_fail (y2 != NULL, FALSE);
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
g_return_val_if_fail (gimage != NULL, FALSE);
if (gimp_channel_bounds (gimp_image_get_mask (gimage), x1, y1, x2, y2))
{
gint off_x, off_y;
gimp_item_offsets (item, &off_x, &off_y);
*x1 = CLAMP (*x1 - off_x, 0, gimp_item_width (item));
*y1 = CLAMP (*y1 - off_y, 0, gimp_item_height (item));
*x2 = CLAMP (*x2 - off_x, 0, gimp_item_width (item));
*y2 = CLAMP (*y2 - off_y, 0, gimp_item_height (item));
return TRUE;
}
else
{
*x2 = gimp_item_width (item);
*y2 = gimp_item_height (item);
return FALSE;
}
}
gboolean
gimp_drawable_has_alpha (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return drawable->has_alpha;
}
GimpImageType
gimp_drawable_type (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->type;
}
GimpImageType
gimp_drawable_type_with_alpha (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return GIMP_IMAGE_TYPE_WITH_ALPHA (gimp_drawable_type (drawable));
}
gboolean
gimp_drawable_is_rgb (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return GIMP_IMAGE_TYPE_IS_RGB (gimp_drawable_type (drawable));
}
gboolean
gimp_drawable_is_gray (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return GIMP_IMAGE_TYPE_IS_GRAY (gimp_drawable_type (drawable));
}
gboolean
gimp_drawable_is_indexed (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return GIMP_IMAGE_TYPE_IS_INDEXED (gimp_drawable_type (drawable));
}
TileManager *
gimp_drawable_data (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
return drawable->tiles;
}
TileManager *
gimp_drawable_shadow (GimpDrawable *drawable)
{
GimpItem *item;
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
item = GIMP_ITEM (drawable);
if (! (gimage = gimp_item_get_image (item)))
return NULL;
return gimp_image_shadow (gimage, item->width, item->height,
drawable->bytes);
}
gint
gimp_drawable_bytes (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->bytes;
}
gint
gimp_drawable_bytes_with_alpha (const GimpDrawable *drawable)
{
GimpImageType type;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
type = GIMP_IMAGE_TYPE_WITH_ALPHA (gimp_drawable_type (drawable));
return GIMP_IMAGE_TYPE_BYTES (type);
}
gboolean
gimp_drawable_get_visible (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return drawable->visible;
}
void
gimp_drawable_set_visible (GimpDrawable *drawable,
gboolean visible,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (drawable->visible != visible)
{
GimpItem *item = GIMP_ITEM (drawable);
if (push_undo)
{
GimpImage *gimage = gimp_item_get_image (item);
if (gimage)
gimp_image_undo_push_drawable_visibility (gimage, NULL, drawable);
}
drawable->visible = visible ? TRUE : FALSE;
g_signal_emit (drawable, gimp_drawable_signals[VISIBILITY_CHANGED], 0);
}
}
void
gimp_drawable_alpha_changed (GimpDrawable *drawable)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_signal_emit (drawable, gimp_drawable_signals[ALPHA_CHANGED], 0);
}
void
gimp_drawable_invalidate_boundary (GimpDrawable *drawable)
{
GimpDrawableClass *drawable_class;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
drawable_class = GIMP_DRAWABLE_GET_CLASS (drawable);
if (drawable_class->invalidate_boundary)
drawable_class->invalidate_boundary (drawable);
}
guchar *
gimp_drawable_cmap (const GimpDrawable *drawable)
{
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
if (gimage)
return gimage->cmap;
return NULL;
}
guchar *
gimp_drawable_get_color_at (GimpDrawable *drawable,
gint x,
gint y)
{
GimpImage *gimage;
Tile *tile;
guchar *src;
guchar *dest;
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);
/* do not make this a g_return_if_fail() */
if (x < 0 || x >= GIMP_ITEM (drawable)->width ||
y < 0 || y >= GIMP_ITEM (drawable)->height)
return NULL;
dest = g_new (guchar, 5);
tile = tile_manager_get_tile (gimp_drawable_data (drawable), x, y,
TRUE, FALSE);
src = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
gimp_image_get_color (gimage, gimp_drawable_type (drawable), src, dest);
if (GIMP_IMAGE_TYPE_HAS_ALPHA (gimp_drawable_type (drawable)))
dest[ALPHA_PIX] = src[gimp_drawable_bytes (drawable) - 1];
else
dest[ALPHA_PIX] = OPAQUE_OPACITY;
if (gimp_drawable_is_indexed (drawable))
dest[4] = src[0];
else
dest[4] = 0;
tile_release (tile, FALSE);
return dest;
}
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