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Gimp/app/core/gimplayer.c
Michael Natterer 09454fb2a4 some general cleanup. 
2005-09-03  Michael Natterer  <mitch@gimp.org>

	* app/base/pixel-region.[ch]: some general cleanup.

	(pixel_region_init_temp_buf)
	(pixel_region_init_data): new functions which initialize pixel
	regions on TempBufs and on raw contiguous arrays of pixel data.

	(pixel_region_configure): fixed a bug that has probably been there
	forever: when processing contiguous (non-tiled) data, interpret
	the original x and y coordinates of the region as offsets into
	the data. Before this fix, the initial x and y were simply ignored
	(by using them in a broken way), thus always forcing the upper
	left corner of the region being the beginning of the passed data.

	Lots of code was working around this problem by setting the
	pixel_region's data pointer to the proper starting pixel of the
	region in the middle the buffer.

	* libgimp/gimppixelrgn.c: some general cleanup.

	(gimp_pixel_rgn_configure): same fix as above. Fortunately, nobody
	seems to know that libgimp pixel regions can be used on arrays of
	data, just as core ones. Only two plug-ins were using this
	feature, and they are antique and written by spencer and federico,
	respectively. They both don't use offsets into the buffers and are
	not affected by this change. It's highly unlikely that anybody out
	there knows/uses this feature, so it can IMHO be safely changed.

	* app/base/temp-buf.c
	* app/core/gimpbuffer.c
	* app/core/gimpdrawable-combine.c
	* app/core/gimpdrawable-preview.c
	* app/core/gimpimage-preview.c
	* app/core/gimplayer.c
	* app/paint/gimpbrushcore.c
	* app/paint/gimpclone.c
	* app/paint/gimpconvolve.c
	* app/paint/gimpdodgeburn.c
	* app/paint/gimppaintcore.c
	* app/paint/gimpsmudge.c
	* app/tools/gimpiscissorstool.c
	* app/tools/gimppainttool.c: use the pixel_region_init_foo()
	functions instead of initializing regions of TempBufs and raw data
	manually. Removed lots of workarounds for the broken offset
	handling. The changed places of code are much more readable now.
2005-09-03 17:16:58 +00:00

1923 lines
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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 <string.h>
#include <glib-object.h>
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "base/boundary.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "base/tile.h"
#include "paint-funcs/paint-funcs.h"
#include "gimp-utils.h"
#include "gimpcontext.h"
#include "gimpcontainer.h"
#include "gimpdrawable-convert.h"
#include "gimpdrawable-invert.h"
#include "gimpimage-undo-push.h"
#include "gimpimage-undo.h"
#include "gimpimage.h"
#include "gimplayer-floating-sel.h"
#include "gimplayer.h"
#include "gimplayermask.h"
#include "gimpmarshal.h"
#include "gimppickable.h"
#include "gimp-intl.h"
enum
{
OPACITY_CHANGED,
MODE_CHANGED,
LOCK_ALPHA_CHANGED,
MASK_CHANGED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_OPACITY,
PROP_MODE,
PROP_LOCK_ALPHA
};
static void gimp_layer_class_init (GimpLayerClass *klass);
static void gimp_layer_init (GimpLayer *layer);
static void gimp_layer_pickable_iface_init (GimpPickableInterface *pickable_iface);
static void gimp_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_layer_dispose (GObject *object);
static void gimp_layer_finalize (GObject *object);
static void gimp_layer_name_changed (GimpObject *object);
static gint64 gimp_layer_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_layer_invalidate_preview (GimpViewable *viewable);
static gchar * gimp_layer_get_description (GimpViewable *viewable,
gchar **tooltip);
static void gimp_layer_removed (GimpItem *item);
static gboolean gimp_layer_is_attached (GimpItem *item);
static GimpItem * gimp_layer_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha);
static void gimp_layer_convert (GimpItem *item,
GimpImage *dest_image);
static gboolean gimp_layer_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc);
static void gimp_layer_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo);
static void gimp_layer_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type,
GimpProgress *progress);
static void gimp_layer_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void gimp_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void gimp_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gboolean supersample,
gint recursion_level,
gboolean clip_result,
GimpProgress *progress);
static void gimp_layer_invalidate_boundary (GimpDrawable *drawable);
static void gimp_layer_get_active_components (const GimpDrawable *drawable,
gboolean *active);
static void gimp_layer_set_tiles (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
TileManager *tiles,
GimpImageType type,
gint offset_x,
gint offset_y);
static gint gimp_layer_get_opacity_at (GimpPickable *pickable,
gint x,
gint y);
static void gimp_layer_transform_color (GimpImage *gimage,
PixelRegion *layerPR,
PixelRegion *bufPR,
GimpDrawable *drawable,
GimpImageType src_type);
static void gimp_layer_layer_mask_update (GimpDrawable *layer_mask,
gint x,
gint y,
gint width,
gint height,
GimpLayer *layer);
static guint layer_signals[LAST_SIGNAL] = { 0 };
static GimpDrawableClass *parent_class = NULL;
GType
gimp_layer_get_type (void)
{
static GType layer_type = 0;
if (! layer_type)
{
static const GTypeInfo layer_info =
{
sizeof (GimpLayerClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_layer_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpLayer),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_layer_init,
};
static const GInterfaceInfo pickable_iface_info =
{
(GInterfaceInitFunc) gimp_layer_pickable_iface_init,
NULL, /* iface_finalize */
NULL /* iface_data */
};
layer_type = g_type_register_static (GIMP_TYPE_DRAWABLE,
"GimpLayer",
&layer_info, 0);
g_type_add_interface_static (layer_type, GIMP_TYPE_PICKABLE,
&pickable_iface_info);
}
return layer_type;
}
static void
gimp_layer_class_init (GimpLayerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
GimpItemClass *item_class = GIMP_ITEM_CLASS (klass);
GimpDrawableClass *drawable_class = GIMP_DRAWABLE_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
layer_signals[OPACITY_CHANGED] =
g_signal_new ("opacity-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, opacity_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[MODE_CHANGED] =
g_signal_new ("mode-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, mode_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[LOCK_ALPHA_CHANGED] =
g_signal_new ("lock-alpha-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, lock_alpha_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[MASK_CHANGED] =
g_signal_new ("mask-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, mask_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->set_property = gimp_layer_set_property;
object_class->get_property = gimp_layer_get_property;
object_class->dispose = gimp_layer_dispose;
object_class->finalize = gimp_layer_finalize;
gimp_object_class->name_changed = gimp_layer_name_changed;
gimp_object_class->get_memsize = gimp_layer_get_memsize;
viewable_class->default_stock_id = "gimp-layer";
viewable_class->invalidate_preview = gimp_layer_invalidate_preview;
viewable_class->get_description = gimp_layer_get_description;
item_class->removed = gimp_layer_removed;
item_class->is_attached = gimp_layer_is_attached;
item_class->duplicate = gimp_layer_duplicate;
item_class->convert = gimp_layer_convert;
item_class->rename = gimp_layer_rename;
item_class->translate = gimp_layer_translate;
item_class->scale = gimp_layer_scale;
item_class->resize = gimp_layer_resize;
item_class->flip = gimp_layer_flip;
item_class->rotate = gimp_layer_rotate;
item_class->transform = gimp_layer_transform;
item_class->default_name = _("Layer");
item_class->rename_desc = _("Rename Layer");
item_class->translate_desc = _("Move Layer");
item_class->scale_desc = _("Scale Layer");
item_class->resize_desc = _("Resize Layer");
item_class->flip_desc = _("Flip Layer");
item_class->rotate_desc = _("Rotate Layer");
item_class->transform_desc = _("Transform Layer");
drawable_class->invalidate_boundary = gimp_layer_invalidate_boundary;
drawable_class->get_active_components = gimp_layer_get_active_components;
drawable_class->set_tiles = gimp_layer_set_tiles;
klass->opacity_changed = NULL;
klass->mode_changed = NULL;
klass->lock_alpha_changed = NULL;
klass->mask_changed = NULL;
g_object_class_install_property (object_class, PROP_OPACITY,
g_param_spec_double ("opacity", NULL, NULL,
GIMP_OPACITY_TRANSPARENT,
GIMP_OPACITY_OPAQUE,
GIMP_OPACITY_OPAQUE,
G_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_MODE,
g_param_spec_enum ("mode", NULL, NULL,
GIMP_TYPE_LAYER_MODE_EFFECTS,
GIMP_NORMAL_MODE,
G_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_LOCK_ALPHA,
g_param_spec_boolean ("lock-alpha",
NULL, NULL,
FALSE,
G_PARAM_READABLE));
}
static void
gimp_layer_init (GimpLayer *layer)
{
layer->opacity = GIMP_OPACITY_OPAQUE;
layer->mode = GIMP_NORMAL_MODE;
layer->lock_alpha = FALSE;
layer->mask = NULL;
/* floating selection */
layer->fs.backing_store = NULL;
layer->fs.drawable = NULL;
layer->fs.initial = TRUE;
layer->fs.boundary_known = FALSE;
layer->fs.segs = NULL;
layer->fs.num_segs = 0;
}
static void
gimp_layer_pickable_iface_init (GimpPickableInterface *pickable_iface)
{
pickable_iface->get_opacity_at = gimp_layer_get_opacity_at;
}
static void
gimp_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
case PROP_OPACITY:
case PROP_MODE:
case PROP_LOCK_ALPHA:
g_assert_not_reached ();
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpLayer *layer = GIMP_LAYER (object);
switch (property_id)
{
case PROP_OPACITY:
g_value_set_double (value, layer->opacity);
break;
case PROP_MODE:
g_value_set_enum (value, layer->mode);
break;
case PROP_LOCK_ALPHA:
g_value_set_boolean (value, layer->lock_alpha);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_layer_dispose (GObject *object)
{
GimpLayer *layer = GIMP_LAYER (object);
if (layer->mask)
g_signal_handlers_disconnect_by_func (layer->mask,
gimp_layer_layer_mask_update,
layer);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_layer_finalize (GObject *object)
{
GimpLayer *layer = GIMP_LAYER (object);
if (layer->mask)
{
g_object_unref (layer->mask);
layer->mask = NULL;
}
if (layer->fs.backing_store)
{
tile_manager_unref (layer->fs.backing_store);
layer->fs.backing_store = NULL;
}
if (layer->fs.segs)
{
g_free (layer->fs.segs);
layer->fs.segs = NULL;
layer->fs.num_segs = 0;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_layer_name_changed (GimpObject *object)
{
GimpLayer *layer = GIMP_LAYER (object);
if (GIMP_OBJECT_CLASS (parent_class)->name_changed)
GIMP_OBJECT_CLASS (parent_class)->name_changed (object);
if (layer->mask)
{
gchar *mask_name;
mask_name = g_strdup_printf (_("%s mask"), gimp_object_get_name (object));
gimp_object_set_name (GIMP_OBJECT (layer->mask), mask_name);
g_free (mask_name);
}
}
static gint64
gimp_layer_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpLayer *layer = GIMP_LAYER (object);
gint64 memsize = 0;
if (layer->mask)
memsize += gimp_object_get_memsize (GIMP_OBJECT (layer->mask), gui_size);
if (layer->fs.backing_store)
*gui_size += tile_manager_get_memsize (layer->fs.backing_store, FALSE);
*gui_size += layer->fs.num_segs * sizeof (BoundSeg);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
gimp_layer_invalidate_preview (GimpViewable *viewable)
{
GimpLayer *layer = GIMP_LAYER (viewable);
if (GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview)
GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable);
if (gimp_layer_is_floating_sel (layer))
floating_sel_invalidate (layer);
}
static gchar *
gimp_layer_get_description (GimpViewable *viewable,
gchar **tooltip)
{
if (gimp_layer_is_floating_sel (GIMP_LAYER (viewable)))
{
if (tooltip)
*tooltip = NULL;
return g_strdup_printf (_("Floating Selection\n(%s)"),
gimp_object_get_name (GIMP_OBJECT (viewable)));
}
return GIMP_VIEWABLE_CLASS (parent_class)->get_description (viewable,
tooltip);
}
static void
gimp_layer_get_active_components (const GimpDrawable *drawable,
gboolean *active)
{
GimpLayer *layer = GIMP_LAYER (drawable);
GimpImage *gimage = gimp_item_get_image (GIMP_ITEM (drawable));
gint i;
/* first copy the gimage active channels */
for (i = 0; i < MAX_CHANNELS; i++)
active[i] = gimage->active[i];
if (gimp_drawable_has_alpha (drawable) && layer->lock_alpha)
active[gimp_drawable_bytes (drawable) - 1] = FALSE;
}
static void
gimp_layer_set_tiles (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc,
TileManager *tiles,
GimpImageType type,
gint offset_x,
gint offset_y)
{
GimpLayer *layer = GIMP_LAYER (drawable);
if (gimp_layer_is_floating_sel (layer))
floating_sel_relax (layer, FALSE);
GIMP_DRAWABLE_CLASS (parent_class)->set_tiles (drawable,
push_undo, undo_desc,
tiles, type,
offset_x, offset_y);
if (gimp_layer_is_floating_sel (layer))
floating_sel_rigor (layer, FALSE);
}
static void
gimp_layer_removed (GimpItem *item)
{
GimpLayer *layer = GIMP_LAYER (item);
if (layer->mask)
gimp_item_removed (GIMP_ITEM (layer->mask));
if (GIMP_ITEM_CLASS (parent_class)->removed)
GIMP_ITEM_CLASS (parent_class)->removed (item);
}
static gboolean
gimp_layer_is_attached (GimpItem *item)
{
return (GIMP_IS_IMAGE (item->gimage) &&
gimp_container_have (item->gimage->layers, GIMP_OBJECT (item)));
}
static GimpItem *
gimp_layer_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha)
{
GimpLayer *layer;
GimpItem *new_item;
GimpLayer *new_layer;
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_LAYER (new_item))
return new_item;
layer = GIMP_LAYER (item);
new_layer = GIMP_LAYER (new_item);
new_layer->mode = layer->mode;
new_layer->opacity = layer->opacity;
new_layer->lock_alpha = layer->lock_alpha;
/* duplicate the layer mask if necessary */
if (layer->mask)
{
GimpItem *dup = gimp_item_duplicate (GIMP_ITEM (layer->mask),
G_TYPE_FROM_INSTANCE (layer->mask),
FALSE);
gimp_layer_add_mask (new_layer, GIMP_LAYER_MASK (dup), FALSE);
}
return new_item;
}
static void
gimp_layer_convert (GimpItem *item,
GimpImage *dest_image)
{
GimpLayer *layer = GIMP_LAYER (item);
GimpDrawable *drawable = GIMP_DRAWABLE (item);
GimpImageBaseType old_base_type;
GimpImageBaseType new_base_type;
old_base_type = GIMP_IMAGE_TYPE_BASE_TYPE (gimp_drawable_type (drawable));
new_base_type = gimp_image_base_type (dest_image);
if (old_base_type != new_base_type)
{
TileManager *new_tiles;
GimpImageType new_type;
new_type = GIMP_IMAGE_TYPE_FROM_BASE_TYPE (new_base_type);
if (gimp_drawable_has_alpha (drawable))
new_type = GIMP_IMAGE_TYPE_WITH_ALPHA (new_type);
new_tiles = tile_manager_new (gimp_item_width (item),
gimp_item_height (item),
GIMP_IMAGE_TYPE_BYTES (new_type));
switch (new_base_type)
{
case GIMP_RGB:
gimp_drawable_convert_rgb (drawable,
new_tiles,
old_base_type);
break;
case GIMP_GRAY:
gimp_drawable_convert_grayscale (drawable,
new_tiles,
old_base_type);
break;
case GIMP_INDEXED:
{
PixelRegion layerPR;
PixelRegion newPR;
pixel_region_init (&layerPR, drawable->tiles,
0, 0,
gimp_item_width (item),
gimp_item_height (item),
FALSE);
pixel_region_init (&newPR, new_tiles,
0, 0,
gimp_item_width (item),
gimp_item_height (item),
TRUE);
gimp_layer_transform_color (gimp_item_get_image (item),
&newPR, &layerPR,
NULL,
gimp_drawable_type (drawable));
}
break;
}
gimp_drawable_set_tiles_full (drawable, FALSE, NULL,
new_tiles, new_type,
GIMP_ITEM (layer)->offset_x,
GIMP_ITEM (layer)->offset_y);
tile_manager_unref (new_tiles);
}
if (layer->mask)
gimp_item_set_image (GIMP_ITEM (layer->mask), dest_image);
GIMP_ITEM_CLASS (parent_class)->convert (item, dest_image);
}
static gboolean
gimp_layer_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc)
{
GimpLayer *layer = GIMP_LAYER (item);
GimpImage *gimage;
gboolean attached;
gboolean floating_sel;
gimage = gimp_item_get_image (item);
attached = gimp_item_is_attached (item);
floating_sel = gimp_layer_is_floating_sel (layer);
if (floating_sel)
{
if (GIMP_IS_CHANNEL (layer->fs.drawable))
return FALSE;
if (attached)
{
gimp_image_undo_group_start (gimage,
GIMP_UNDO_GROUP_ITEM_PROPERTIES,
undo_desc);
floating_sel_to_layer (layer);
}
}
GIMP_ITEM_CLASS (parent_class)->rename (item, new_name, undo_desc);
if (attached && floating_sel)
gimp_image_undo_group_end (gimage);
return TRUE;
}
static void
gimp_layer_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo)
{
GimpLayer *layer = GIMP_LAYER (item);
if (push_undo)
gimp_image_undo_push_item_displace (gimp_item_get_image (item), NULL, item);
/* update the old region */
gimp_drawable_update (GIMP_DRAWABLE (layer), 0, 0, item->width, item->height);
/* invalidate the selection boundary because of a layer modification */
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (layer));
if (gimp_layer_is_floating_sel (layer))
floating_sel_relax (layer, FALSE);
GIMP_ITEM_CLASS (parent_class)->translate (item, offset_x, offset_y,
push_undo);
if (gimp_layer_is_floating_sel (layer))
floating_sel_rigor (layer, FALSE);
/* update the new region */
gimp_drawable_update (GIMP_DRAWABLE (layer), 0, 0, item->width, item->height);
if (layer->mask)
{
GIMP_ITEM (layer->mask)->offset_x = item->offset_x;
GIMP_ITEM (layer->mask)->offset_y = item->offset_y;
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer->mask));
}
}
static void
gimp_layer_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type,
GimpProgress *progress)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->scale (item, new_width, new_height,
new_offset_x, new_offset_y,
interpolation_type, progress);
if (layer->mask)
gimp_item_scale (GIMP_ITEM (layer->mask),
new_width, new_height,
new_offset_x, new_offset_y,
interpolation_type, progress);
}
static void
gimp_layer_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->resize (item, context, new_width, new_height,
offset_x, offset_y);
if (layer->mask)
gimp_item_resize (GIMP_ITEM (layer->mask), context,
new_width, new_height, offset_x, offset_y);
}
static void
gimp_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->flip (item, context, flip_type, axis,
clip_result);
if (layer->mask)
gimp_item_flip (GIMP_ITEM (layer->mask), context,
flip_type, axis, clip_result);
}
static void
gimp_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->rotate (item, context,
rotate_type, center_x, center_y,
clip_result);
if (layer->mask)
gimp_item_rotate (GIMP_ITEM (layer->mask), context,
rotate_type, center_x, center_y, clip_result);
}
static void
gimp_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gboolean supersample,
gint recursion_level,
gboolean clip_result,
GimpProgress *progress)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->transform (item, context, matrix, direction,
interpolation_type,
supersample, recursion_level,
clip_result, progress);
if (layer->mask)
gimp_item_transform (GIMP_ITEM (layer->mask), context,
matrix, direction,
interpolation_type,
supersample, recursion_level,
clip_result, progress);
}
static void
gimp_layer_invalidate_boundary (GimpDrawable *drawable)
{
GimpLayer *layer = GIMP_LAYER (drawable);
GimpImage *gimage;
GimpChannel *mask;
if (! (gimage = gimp_item_get_image (GIMP_ITEM (layer))))
return;
/* Turn the current selection off */
gimp_image_selection_control (gimage, GIMP_SELECTION_OFF);
/* clear the affected region surrounding the layer */
gimp_image_selection_control (gimage, GIMP_SELECTION_LAYER_OFF);
/* get the selection mask channel */
mask = gimp_image_get_mask (gimage);
/* Only bother with the bounds if there is a selection */
if (! gimp_channel_is_empty (mask))
{
mask->bounds_known = FALSE;
mask->boundary_known = FALSE;
}
if (gimp_layer_is_floating_sel (layer))
floating_sel_invalidate (layer);
}
static gint
gimp_layer_get_opacity_at (GimpPickable *pickable,
gint x,
gint y)
{
GimpLayer *layer = GIMP_LAYER (pickable);
Tile *tile;
gint val = 0;
if (x >= 0 && x < GIMP_ITEM (layer)->width &&
y >= 0 && y < GIMP_ITEM (layer)->height &&
gimp_item_get_visible (GIMP_ITEM (layer)))
{
/* If the point is inside, and the layer has no
* alpha channel, success!
*/
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
return OPAQUE_OPACITY;
/* Otherwise, determine if the alpha value at
* the given point is non-zero
*/
tile = tile_manager_get_tile (GIMP_DRAWABLE (layer)->tiles,
x, y, TRUE, FALSE);
val = * ((guchar *) tile_data_pointer (tile,
x % TILE_WIDTH,
y % TILE_HEIGHT) +
tile_bpp (tile) - 1);
if (layer->mask)
{
gint mask_val;
mask_val = gimp_pickable_get_opacity_at (GIMP_PICKABLE (layer->mask),
x, y);
val = val * mask_val / 255;
}
tile_release (tile, FALSE);
}
return val;
}
static void
gimp_layer_transform_color (GimpImage *gimage,
PixelRegion *layerPR,
PixelRegion *bufPR,
GimpDrawable *drawable,
GimpImageType src_type)
{
GimpImageBaseType base_type = GIMP_IMAGE_TYPE_BASE_TYPE (src_type);
gboolean alpha = GIMP_IMAGE_TYPE_HAS_ALPHA (src_type);
gpointer pr;
for (pr = pixel_regions_register (2, layerPR, bufPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
const guchar *src = bufPR->data;
guchar *dest = layerPR->data;
gint h = layerPR->h;
while (h--)
{
const guchar *s = src;
guchar *d = dest;
gint i;
for (i = 0; i < layerPR->w; i++)
{
gimp_image_transform_color (gimage, drawable, d, base_type, s);
/* alpha channel */
d[layerPR->bytes - 1] = (alpha ?
s[bufPR->bytes - 1] : OPAQUE_OPACITY);
s += bufPR->bytes;
d += layerPR->bytes;
}
src += bufPR->rowstride;
dest += layerPR->rowstride;
}
}
}
static void
gimp_layer_layer_mask_update (GimpDrawable *drawable,
gint x,
gint y,
gint width,
gint height,
GimpLayer *layer)
{
GimpLayerMask *layer_mask = GIMP_LAYER_MASK (drawable);
if (layer_mask->apply_mask || layer_mask->show_mask)
{
gimp_drawable_update (GIMP_DRAWABLE (layer),
x, y, width, height);
}
}
/* public functions */
GimpLayer *
gimp_layer_new (GimpImage *gimage,
gint width,
gint height,
GimpImageType type,
const gchar *name,
gdouble opacity,
GimpLayerModeEffects mode)
{
GimpLayer *layer;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
layer = g_object_new (GIMP_TYPE_LAYER, NULL);
gimp_drawable_configure (GIMP_DRAWABLE (layer),
gimage,
0, 0, width, height,
type,
name);
opacity = CLAMP (opacity, GIMP_OPACITY_TRANSPARENT, GIMP_OPACITY_OPAQUE);
layer->opacity = opacity;
layer->mode = mode;
return layer;
}
/**
* gimp_layer_new_from_tiles:
* @tiles: The buffer to make the new layer from.
* @dest_gimage: The image the new layer will be added to.
* @type: The #GimpImageType of the new layer.
* @name: The new layer's name.
* @opacity: The new layer's opacity.
* @mode: The new layer's mode.
*
* Copies %tiles to a layer taking into consideration the
* possibility of transforming the contents to meet the requirements
* of the target image type
*
* Return value: The new layer.
**/
GimpLayer *
gimp_layer_new_from_tiles (TileManager *tiles,
GimpImage *dest_gimage,
GimpImageType type,
const gchar *name,
gdouble opacity,
GimpLayerModeEffects mode)
{
PixelRegion bufPR;
g_return_val_if_fail (tiles != NULL, NULL);
g_return_val_if_fail (GIMP_IS_IMAGE (dest_gimage), NULL);
g_return_val_if_fail (name != NULL, NULL);
pixel_region_init (&bufPR, tiles,
0, 0,
tile_manager_width (tiles),
tile_manager_height (tiles),
FALSE);
return gimp_layer_new_from_region (&bufPR, dest_gimage, type,
name, opacity, mode);
}
/**
* gimp_layer_new_from_pixbuf:
* @pixbuf: The pixbuf to make the new layer from.
* @dest_gimage: The image the new layer will be added to.
* @type: The #GimpImageType of the new layer.
* @name: The new layer's name.
* @opacity: The new layer's opacity.
* @mode: The new layer's mode.
*
* Copies %pixbuf to a layer taking into consideration the
* possibility of transforming the contents to meet the requirements
* of the target image type
*
* Return value: The new layer.
**/
GimpLayer *
gimp_layer_new_from_pixbuf (GdkPixbuf *pixbuf,
GimpImage *dest_gimage,
GimpImageType type,
const gchar *name,
gdouble opacity,
GimpLayerModeEffects mode)
{
PixelRegion bufPR = { 0, };
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
g_return_val_if_fail (GIMP_IS_IMAGE (dest_gimage), NULL);
g_return_val_if_fail (name != NULL, NULL);
pixel_region_init_data (&bufPR, gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_n_channels (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf),
0, 0,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf));
return gimp_layer_new_from_region (&bufPR, dest_gimage, type,
name, opacity, mode);
}
/**
* gimp_layer_new_from_region:
* @region: A readable pixel region.
* @dest_gimage: The image the new layer will be added to.
* @type: The #GimpImageType of the new layer.
* @name: The new layer's name.
* @opacity: The new layer's opacity.
* @mode: The new layer's mode.
*
* Copies %region to a layer taking into consideration the
* possibility of transforming the contents to meet the requirements
* of the target image type
*
* Return value: The new layer.
**/
GimpLayer *
gimp_layer_new_from_region (PixelRegion *region,
GimpImage *dest_gimage,
GimpImageType type,
const gchar *name,
gdouble opacity,
GimpLayerModeEffects mode)
{
GimpLayer *new_layer;
PixelRegion layerPR;
GimpImageType src_type;
gint width;
gint height;
g_return_val_if_fail (region != NULL, NULL);
g_return_val_if_fail (GIMP_IS_IMAGE (dest_gimage), NULL);
g_return_val_if_fail (name != NULL, NULL);
width = region->w;
height = region->h;
switch (region->bytes)
{
case 1: src_type = GIMP_GRAY_IMAGE; break;
case 2: src_type = GIMP_GRAYA_IMAGE; break;
case 3: src_type = GIMP_RGB_IMAGE; break;
case 4: src_type = GIMP_RGBA_IMAGE; break;
default:
g_return_val_if_reached (NULL);
break;
}
new_layer = gimp_layer_new (dest_gimage, width, height, type, name,
opacity, mode);
if (! new_layer)
{
g_message ("gimp_layer_new_from_region: could not allocate new layer");
return NULL;
}
pixel_region_init (&layerPR, GIMP_DRAWABLE (new_layer)->tiles,
0, 0, width, height,
TRUE);
switch (type)
{
case GIMP_RGB_IMAGE:
switch (src_type)
{
case GIMP_RGB_IMAGE:
copy_region (region, &layerPR);
break;
default:
g_warning ("%s: unhandled type conversion", G_STRFUNC);
break;
}
break;
case GIMP_RGBA_IMAGE:
switch (src_type)
{
case GIMP_RGBA_IMAGE:
copy_region (region, &layerPR);
break;
case GIMP_RGB_IMAGE:
add_alpha_region (region, &layerPR);
break;
case GIMP_GRAY_IMAGE:
case GIMP_GRAYA_IMAGE:
gimp_layer_transform_color (dest_gimage, &layerPR, region,
GIMP_DRAWABLE (new_layer), src_type);
break;
default:
g_warning ("%s: unhandled type conversion", G_STRFUNC);
break;
}
break;
case GIMP_GRAY_IMAGE:
switch (src_type)
{
case GIMP_GRAY_IMAGE:
copy_region (region, &layerPR);
break;
default:
g_warning ("%s: unhandled type conversion", G_STRFUNC);
break;
}
break;
case GIMP_GRAYA_IMAGE:
switch (src_type)
{
case GIMP_RGB_IMAGE:
case GIMP_RGBA_IMAGE:
gimp_layer_transform_color (dest_gimage, &layerPR, region,
GIMP_DRAWABLE (new_layer), src_type);
break;
case GIMP_GRAYA_IMAGE:
copy_region (region, &layerPR);
break;
case GIMP_GRAY_IMAGE:
add_alpha_region (region, &layerPR);
break;
default:
g_warning ("%s: unhandled type conversion", G_STRFUNC);
break;
}
break;
case GIMP_INDEXED_IMAGE:
g_warning ("%s: unhandled type conversion", G_STRFUNC);
break;
case GIMP_INDEXEDA_IMAGE:
switch (src_type)
{
case GIMP_RGB_IMAGE:
case GIMP_RGBA_IMAGE:
gimp_layer_transform_color (dest_gimage, &layerPR, region,
GIMP_DRAWABLE (new_layer), src_type);
break;
case GIMP_GRAY_IMAGE:
case GIMP_GRAYA_IMAGE:
gimp_layer_transform_color (dest_gimage, &layerPR, region,
GIMP_DRAWABLE (new_layer), src_type);
break;
default:
g_warning ("%s: unhandled type conversion", G_STRFUNC);
break;
}
break;
}
return new_layer;
}
GimpLayerMask *
gimp_layer_add_mask (GimpLayer *layer,
GimpLayerMask *mask,
gboolean push_undo)
{
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
g_return_val_if_fail (GIMP_IS_LAYER_MASK (mask), NULL);
if (! gimp_item_is_attached (GIMP_ITEM (layer)))
push_undo = FALSE;
gimage = gimp_item_get_image (GIMP_ITEM (layer));
if (! gimage)
{
g_message (_("Cannot add layer mask to layer "
"which is not part of an image."));
return NULL;
}
if (layer->mask)
{
g_message (_("Unable to add a layer mask since "
"the layer already has one."));
return NULL;
}
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
{
g_message (_("Cannot add layer mask to a layer "
"with no alpha channel."));
return NULL;
}
if ((gimp_item_width (GIMP_ITEM (layer)) !=
gimp_item_width (GIMP_ITEM (mask))) ||
(gimp_item_height (GIMP_ITEM (layer)) !=
gimp_item_height (GIMP_ITEM (mask))))
{
g_message (_("Cannot add layer mask of different "
"dimensions than specified layer."));
return NULL;
}
if (push_undo)
gimp_image_undo_push_layer_mask_add (gimage, _("Add Layer Mask"),
layer, mask);
layer->mask = g_object_ref (mask);
gimp_item_sink (GIMP_ITEM (layer->mask));
gimp_layer_mask_set_layer (mask, layer);
if (mask->apply_mask || mask->show_mask)
{
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height);
}
g_signal_connect (mask, "update",
G_CALLBACK (gimp_layer_layer_mask_update),
layer);
g_signal_emit (layer, layer_signals[MASK_CHANGED], 0);
return layer->mask;
}
GimpLayerMask *
gimp_layer_create_mask (const GimpLayer *layer,
GimpAddMaskType add_mask_type)
{
GimpDrawable *drawable;
GimpItem *item;
PixelRegion srcPR;
PixelRegion destPR;
GimpLayerMask *mask;
GimpImage *gimage;
gchar *mask_name;
GimpRGB black = { 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE };
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
drawable = GIMP_DRAWABLE (layer);
item = GIMP_ITEM (layer);
gimage = gimp_item_get_image (item);
mask_name = g_strdup_printf (_("%s mask"),
gimp_object_get_name (GIMP_OBJECT (layer)));
mask = gimp_layer_mask_new (gimage,
item->width,
item->height,
mask_name, &black);
g_free (mask_name);
switch (add_mask_type)
{
case GIMP_ADD_WHITE_MASK:
gimp_channel_all (GIMP_CHANNEL (mask), FALSE);
return mask;
case GIMP_ADD_BLACK_MASK:
gimp_channel_clear (GIMP_CHANNEL (mask), NULL, FALSE);
return mask;
default:
break;
}
pixel_region_init (&destPR, GIMP_DRAWABLE (mask)->tiles,
0, 0,
GIMP_ITEM (mask)->width,
GIMP_ITEM (mask)->height,
TRUE);
switch (add_mask_type)
{
case GIMP_ADD_WHITE_MASK:
case GIMP_ADD_BLACK_MASK:
break;
case GIMP_ADD_ALPHA_MASK:
case GIMP_ADD_ALPHA_TRANSFER_MASK:
if (gimp_drawable_has_alpha (drawable))
{
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
item->width, item->height,
FALSE);
extract_alpha_region (&srcPR, NULL, &destPR);
if (add_mask_type == GIMP_ADD_ALPHA_TRANSFER_MASK)
{
void *pr;
gint w, h;
guchar *alpha_ptr;
gimp_drawable_push_undo (GIMP_DRAWABLE (layer),
_("Transfer Alpha to Mask"),
0, 0,
item->width,
item->height,
NULL, FALSE);
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
item->width, item->height,
TRUE);
for (pr = pixel_regions_register (1, &srcPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
h = srcPR.h;
while (h--)
{
w = srcPR.w;
alpha_ptr = (srcPR.data + h * srcPR.rowstride +
srcPR.bytes - 1);
while (w--)
{
*alpha_ptr = OPAQUE_OPACITY;
alpha_ptr += srcPR.bytes;
}
}
}
}
}
break;
case GIMP_ADD_SELECTION_MASK:
{
GimpChannel *selection;
gboolean selection_empty;
gint copy_x, copy_y;
gint copy_width, copy_height;
selection = gimp_image_get_mask (gimage);
selection_empty = gimp_channel_is_empty (selection);
gimp_rectangle_intersect (0, 0, gimage->width, gimage->height,
item->offset_x, item->offset_y,
item->width, item->height,
&copy_x, &copy_y, &copy_width, &copy_height);
if (copy_width < item->width || copy_height < item->height ||
selection_empty)
gimp_channel_clear (GIMP_CHANNEL (mask), NULL, FALSE);
if ((copy_width || copy_height) && ! selection_empty)
{
pixel_region_init (&srcPR, GIMP_DRAWABLE (selection)->tiles,
copy_x, copy_y,
copy_width, copy_height,
FALSE);
pixel_region_init (&destPR, GIMP_DRAWABLE (mask)->tiles,
copy_x - item->offset_x, copy_y - item->offset_y,
copy_width, copy_height,
TRUE);
copy_region (&srcPR, &destPR);
GIMP_CHANNEL (mask)->bounds_known = FALSE;
}
}
break;
case GIMP_ADD_COPY_MASK:
{
TileManager *copy_tiles = NULL;
GimpImageType layer_type;
layer_type = drawable->type;
if (GIMP_IMAGE_TYPE_BASE_TYPE (layer_type) != GIMP_GRAY)
{
GimpImageType copy_type;
copy_type = (GIMP_IMAGE_TYPE_HAS_ALPHA (layer_type) ?
GIMP_GRAYA_IMAGE : GIMP_GRAY_IMAGE);
copy_tiles = tile_manager_new (item->width,
item->height,
GIMP_IMAGE_TYPE_BYTES (copy_type));
gimp_drawable_convert_grayscale (drawable,
copy_tiles,
GIMP_IMAGE_TYPE_BASE_TYPE (layer_type));
pixel_region_init (&srcPR, copy_tiles,
0, 0,
item->width,
item->height,
FALSE);
}
else
{
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
item->width,
item->height,
FALSE);
}
if (gimp_drawable_has_alpha (drawable))
{
guchar black_uchar[] = { 0, 0, 0, 0 };
flatten_region (&srcPR, &destPR, black_uchar);
}
else
{
copy_region (&srcPR, &destPR);
}
if (copy_tiles)
tile_manager_unref (copy_tiles);
}
GIMP_CHANNEL (mask)->bounds_known = FALSE;
break;
}
return mask;
}
void
gimp_layer_apply_mask (GimpLayer *layer,
GimpMaskApplyMode mode,
gboolean push_undo)
{
GimpItem *item;
GimpImage *gimage;
PixelRegion srcPR, maskPR;
gboolean view_changed = FALSE;
g_return_if_fail (GIMP_IS_LAYER (layer));
if (! layer->mask)
return;
/* this operation can only be done to layers with an alpha channel */
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
return;
item = GIMP_ITEM (layer);
gimage = gimp_item_get_image (item);
if (! gimage)
return;
if (push_undo)
{
gimp_image_undo_group_start (gimage, GIMP_UNDO_GROUP_LAYER_APPLY_MASK,
(mode == GIMP_MASK_APPLY) ?
_("Apply Layer Mask") :
_("Delete Layer Mask"));
gimp_image_undo_push_layer_mask_remove (gimage, NULL, layer, layer->mask);
}
/* check if applying the mask changes the projection */
if (layer->mask->show_mask ||
(mode == GIMP_MASK_APPLY && ! layer->mask->apply_mask) ||
(mode == GIMP_MASK_DISCARD && layer->mask->apply_mask))
{
view_changed = TRUE;
}
if (mode == GIMP_MASK_APPLY)
{
if (push_undo)
gimp_drawable_push_undo (GIMP_DRAWABLE (layer), NULL,
0, 0,
item->width,
item->height,
NULL, FALSE);
/* Combine the current layer's alpha channel and the mask */
pixel_region_init (&srcPR, GIMP_DRAWABLE (layer)->tiles,
0, 0,
item->width,
item->height,
TRUE);
pixel_region_init (&maskPR, GIMP_DRAWABLE (layer->mask)->tiles,
0, 0,
item->width,
item->height,
FALSE);
apply_mask_to_region (&srcPR, &maskPR, OPAQUE_OPACITY);
}
g_signal_handlers_disconnect_by_func (layer->mask,
gimp_layer_layer_mask_update,
layer);
gimp_item_removed (GIMP_ITEM (layer->mask));
g_object_unref (layer->mask);
layer->mask = NULL;
if (push_undo)
gimp_image_undo_group_end (gimage);
/* If applying actually changed the view */
if (view_changed)
{
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
item->width,
item->height);
}
else
{
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer));
}
g_signal_emit (layer, layer_signals[MASK_CHANGED], 0);
}
void
gimp_layer_add_alpha (GimpLayer *layer)
{
PixelRegion srcPR, destPR;
TileManager *new_tiles;
GimpImageType new_type;
g_return_if_fail (GIMP_IS_LAYER (layer));
if (gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
return;
new_type = gimp_drawable_type_with_alpha (GIMP_DRAWABLE (layer));
/* Allocate the new tiles */
new_tiles = tile_manager_new (GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
GIMP_IMAGE_TYPE_BYTES (new_type));
/* Configure the pixel regions */
pixel_region_init (&srcPR, GIMP_DRAWABLE (layer)->tiles,
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
FALSE);
pixel_region_init (&destPR, new_tiles,
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
TRUE);
/* Add an alpha channel */
add_alpha_region (&srcPR, &destPR);
/* Set the new tiles */
gimp_drawable_set_tiles_full (GIMP_DRAWABLE (layer),
gimp_item_is_attached (GIMP_ITEM (layer)),
_("Add Alpha Channel"),
new_tiles, new_type,
GIMP_ITEM (layer)->offset_x,
GIMP_ITEM (layer)->offset_y);
tile_manager_unref (new_tiles);
}
void
gimp_layer_flatten (GimpLayer *layer,
GimpContext *context)
{
PixelRegion srcPR, destPR;
TileManager *new_tiles;
GimpImageType new_type;
guchar bg[4];
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (GIMP_IS_CONTEXT (context));
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
return;
new_type = gimp_drawable_type_without_alpha (GIMP_DRAWABLE (layer));
gimp_image_get_background (gimp_item_get_image (GIMP_ITEM (layer)),
GIMP_DRAWABLE (layer),
context, bg);
/* Allocate the new tiles */
new_tiles = tile_manager_new (GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
GIMP_IMAGE_TYPE_BYTES (new_type));
/* Configure the pixel regions */
pixel_region_init (&srcPR, GIMP_DRAWABLE (layer)->tiles,
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
FALSE);
pixel_region_init (&destPR, new_tiles,
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height,
TRUE);
/* Remove alpha channel */
flatten_region (&srcPR, &destPR, bg);
/* Set the new tiles */
gimp_drawable_set_tiles_full (GIMP_DRAWABLE (layer),
gimp_item_is_attached (GIMP_ITEM (layer)),
_("Remove Alpha Channel"),
new_tiles, new_type,
GIMP_ITEM (layer)->offset_x,
GIMP_ITEM (layer)->offset_y);
tile_manager_unref (new_tiles);
}
void
gimp_layer_resize_to_image (GimpLayer *layer,
GimpContext *context)
{
GimpImage *gimage;
gint offset_x;
gint offset_y;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (layer)));
g_return_if_fail (GIMP_IS_CONTEXT (context));
gimage = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_group_start (gimage, GIMP_UNDO_GROUP_ITEM_RESIZE,
_("Layer to Image Size"));
gimp_item_offsets (GIMP_ITEM (layer), &offset_x, &offset_y);
gimp_item_resize (GIMP_ITEM (layer), context,
gimage->width, gimage->height, offset_x, offset_y);
gimp_image_undo_group_end (gimage);
}
BoundSeg *
gimp_layer_boundary (GimpLayer *layer,
gint *num_segs)
{
GimpItem *item;
BoundSeg *new_segs;
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
item = GIMP_ITEM (layer);
/* Create the four boundary segments that encompass this
* layer's boundary.
*/
new_segs = g_new (BoundSeg, 4);
*num_segs = 4;
/* if the layer is a floating selection */
if (gimp_layer_is_floating_sel (layer))
{
if (GIMP_IS_CHANNEL (layer->fs.drawable))
{
/* if the owner drawable is a channel, just return nothing */
g_free (new_segs);
*num_segs = 0;
return NULL;
}
else
{
/* otherwise, set the layer to the owner drawable */
layer = GIMP_LAYER (layer->fs.drawable);
}
}
new_segs[0].x1 = item->offset_x;
new_segs[0].y1 = item->offset_y;
new_segs[0].x2 = item->offset_x;
new_segs[0].y2 = item->offset_y + item->height;
new_segs[0].open = 1;
new_segs[1].x1 = item->offset_x;
new_segs[1].y1 = item->offset_y;
new_segs[1].x2 = item->offset_x + item->width;
new_segs[1].y2 = item->offset_y;
new_segs[1].open = 1;
new_segs[2].x1 = item->offset_x + item->width;
new_segs[2].y1 = item->offset_y;
new_segs[2].x2 = item->offset_x + item->width;
new_segs[2].y2 = item->offset_y + item->height;
new_segs[2].open = 0;
new_segs[3].x1 = item->offset_x;
new_segs[3].y1 = item->offset_y + item->height;
new_segs[3].x2 = item->offset_x + item->width;
new_segs[3].y2 = item->offset_y + item->height;
new_segs[3].open = 0;
return new_segs;
}
/**********************/
/* access functions */
/**********************/
GimpLayerMask *
gimp_layer_get_mask (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
return layer->mask;
}
gboolean
gimp_layer_is_floating_sel (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
return (layer->fs.drawable != NULL);
}
void
gimp_layer_set_opacity (GimpLayer *layer,
gdouble opacity,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
opacity = CLAMP (opacity, GIMP_OPACITY_TRANSPARENT, GIMP_OPACITY_OPAQUE);
if (layer->opacity != opacity)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (layer)))
{
GimpImage *gimage = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_push_layer_opacity (gimage, NULL, layer);
}
layer->opacity = opacity;
g_signal_emit (layer, layer_signals[OPACITY_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "opacity");
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height);
}
}
gdouble
gimp_layer_get_opacity (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), GIMP_OPACITY_OPAQUE);
return layer->opacity;
}
void
gimp_layer_set_mode (GimpLayer *layer,
GimpLayerModeEffects mode,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
if (layer->mode != mode)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (layer)))
{
GimpImage *gimage = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_push_layer_mode (gimage, NULL, layer);
}
layer->mode = mode;
g_signal_emit (layer, layer_signals[MODE_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "mode");
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
GIMP_ITEM (layer)->width,
GIMP_ITEM (layer)->height);
}
}
GimpLayerModeEffects
gimp_layer_get_mode (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), GIMP_NORMAL_MODE);
return layer->mode;
}
void
gimp_layer_set_lock_alpha (GimpLayer *layer,
gboolean lock_alpha,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
lock_alpha = lock_alpha ? TRUE : FALSE;
if (layer->lock_alpha != lock_alpha)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (layer)))
{
GimpImage *gimage = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_push_layer_lock_alpha (gimage, NULL, layer);
}
layer->lock_alpha = lock_alpha;
g_signal_emit (layer, layer_signals[LOCK_ALPHA_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "lock-alpha");
}
}
gboolean
gimp_layer_get_lock_alpha (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
return layer->lock_alpha;
}
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