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gimp/app/core/gimpdrawable.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 "libgimpcolor/gimpcolor.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-combine.h"
#include "gimpdrawable-preview.h"
#include "gimpdrawable-transform.h"
#include "gimpimage.h"
#include "gimpimage-undo-push.h"
#include "gimpmarshal.h"
#include "gimppreviewcache.h"
#include "gimp-intl.h"
enum
{
UPDATE,
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[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 = 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->alpha_changed = NULL;
klass->invalidate_boundary = NULL;
klass->get_active_components = NULL;
klass->apply_region = gimp_drawable_real_apply_region;
klass->replace_region = gimp_drawable_real_replace_region;
}
static void
gimp_drawable_init (GimpDrawable *drawable)
{
drawable->tiles = NULL;
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);
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);
/* 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_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);
}
void
gimp_drawable_get_active_components (const GimpDrawable *drawable,
gboolean *active)
{
GimpDrawableClass *drawable_class;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (active != NULL);
drawable_class = GIMP_DRAWABLE_GET_CLASS (drawable);
if (drawable_class->get_active_components)
drawable_class->get_active_components (drawable, active);
}
void
gimp_drawable_apply_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
GimpLayerModeEffects mode,
TileManager *src1_tiles,
gint x,
gint y)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (src2PR != NULL);
GIMP_DRAWABLE_GET_CLASS (drawable)->apply_region (drawable, src2PR,
push_undo, undo_desc,
opacity, mode,
src1_tiles,
x, y);
}
void
gimp_drawable_replace_region (GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean push_undo,
const gchar *undo_desc,
gdouble opacity,
PixelRegion *maskPR,
gint x,
gint y)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (src2PR != NULL);
g_return_if_fail (maskPR != NULL);
GIMP_DRAWABLE_GET_CLASS (drawable)->replace_region (drawable, src2PR,
push_undo, undo_desc,
opacity, maskPR,
x, y);
}
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);
}
TileManager *
gimp_drawable_shadow (GimpDrawable *drawable)
{
GimpItem *item;
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimp_image_shadow (gimage, item->width, item->height,
drawable->bytes);
}
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_drawable_apply_region (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;
GimpChannel *selection;
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);
selection = gimp_image_get_mask (gimage);
if (GIMP_DRAWABLE (selection) != drawable &&
gimp_channel_bounds (selection, 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;
}
*x1 = 0;
*y1 = 0;
*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));
}
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);
}
TileManager *
gimp_drawable_data (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
return drawable->tiles;
}
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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