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gimp/app/core/gimpimage.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 <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/temp-buf.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "gimp.h"
#include "gimpcontext.h"
#include "gimpcoreconfig.h"
#include "gimpimage.h"
#include "gimpimage-colorhash.h"
#include "gimpimage-mask.h"
#include "gimpimage-projection.h"
#include "gimpimage-undo.h"
#include "gimplayer.h"
#include "gimplayermask.h"
#include "gimplist.h"
#include "gimpmarshal.h"
#include "gimpparasite.h"
#include "gimpparasitelist.h"
#include "gimpundostack.h"
#include "floating_sel.h"
#include "path.h"
#include "undo.h"
#include "libgimp/gimpintl.h"
#ifdef DEBUG
#define TRC(x) printf x
#else
#define TRC(x)
#endif
enum
{
MODE_CHANGED,
ALPHA_CHANGED,
FLOATING_SELECTION_CHANGED,
ACTIVE_LAYER_CHANGED,
ACTIVE_CHANNEL_CHANGED,
COMPONENT_VISIBILITY_CHANGED,
COMPONENT_ACTIVE_CHANGED,
MASK_CHANGED,
RESOLUTION_CHANGED,
UNIT_CHANGED,
QMASK_CHANGED,
SELECTION_CONTROL,
CLEAN,
DIRTY,
UPDATE,
UPDATE_GUIDE,
COLORMAP_CHANGED,
UNDO_EVENT,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_image_class_init (GimpImageClass *klass);
static void gimp_image_init (GimpImage *gimage);
static void gimp_image_dispose (GObject *object);
static void gimp_image_finalize (GObject *object);
static void gimp_image_name_changed (GimpObject *object);
static void gimp_image_invalidate_preview (GimpViewable *viewable);
static void gimp_image_size_changed (GimpViewable *viewable);
static TempBuf *gimp_image_get_preview (GimpViewable *gimage,
gint width,
gint height);
static TempBuf *gimp_image_get_new_preview (GimpViewable *viewable,
gint width,
gint height);
static void gimp_image_real_colormap_changed (GimpImage *gimage,
gint ncol);
static gint valid_combinations[][MAX_CHANNELS + 1] =
{
/* RGB GIMAGE */
{ -1, -1, -1, COMBINE_INTEN_INTEN, COMBINE_INTEN_INTEN_A },
/* RGBA GIMAGE */
{ -1, -1, -1, COMBINE_INTEN_A_INTEN, COMBINE_INTEN_A_INTEN_A },
/* GRAY GIMAGE */
{ -1, COMBINE_INTEN_INTEN, COMBINE_INTEN_INTEN_A, -1, -1 },
/* GRAYA GIMAGE */
{ -1, COMBINE_INTEN_A_INTEN, COMBINE_INTEN_A_INTEN_A, -1, -1 },
/* INDEXED GIMAGE */
{ -1, COMBINE_INDEXED_INDEXED, COMBINE_INDEXED_INDEXED_A, -1, -1 },
/* INDEXEDA GIMAGE */
{ -1, -1, COMBINE_INDEXED_A_INDEXED_A, -1, -1 },
};
static guint gimp_image_signals[LAST_SIGNAL] = { 0 };
static GimpViewableClass *parent_class = NULL;
GType
gimp_image_get_type (void)
{
static GType image_type = 0;
if (! image_type)
{
static const GTypeInfo image_info =
{
sizeof (GimpImageClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_image_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpImage),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_image_init,
};
image_type = g_type_register_static (GIMP_TYPE_VIEWABLE,
"GimpImage",
&image_info, 0);
}
return image_type;
}
/* private functions */
static void
gimp_image_class_init (GimpImageClass *klass)
{
GObjectClass *object_class;
GimpObjectClass *gimp_object_class;
GimpViewableClass *viewable_class;
object_class = G_OBJECT_CLASS (klass);
gimp_object_class = GIMP_OBJECT_CLASS (klass);
viewable_class = GIMP_VIEWABLE_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
gimp_image_signals[MODE_CHANGED] =
g_signal_new ("mode_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, mode_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[ALPHA_CHANGED] =
g_signal_new ("alpha_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, alpha_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[FLOATING_SELECTION_CHANGED] =
g_signal_new ("floating_selection_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, floating_selection_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[ACTIVE_LAYER_CHANGED] =
g_signal_new ("active_layer_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, active_layer_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[ACTIVE_CHANNEL_CHANGED] =
g_signal_new ("active_channel_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, active_channel_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[COMPONENT_VISIBILITY_CHANGED] =
g_signal_new ("component_visibility_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, component_visibility_changed),
NULL, NULL,
gimp_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
gimp_image_signals[COMPONENT_ACTIVE_CHANGED] =
g_signal_new ("component_active_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, component_active_changed),
NULL, NULL,
gimp_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
gimp_image_signals[MASK_CHANGED] =
g_signal_new ("mask_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, mask_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[RESOLUTION_CHANGED] =
g_signal_new ("resolution_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, resolution_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[UNIT_CHANGED] =
g_signal_new ("unit_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, unit_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[QMASK_CHANGED] =
g_signal_new ("qmask_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, qmask_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[SELECTION_CONTROL] =
g_signal_new ("selection_control",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, selection_control),
NULL, NULL,
gimp_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
gimp_image_signals[CLEAN] =
g_signal_new ("clean",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, clean),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[DIRTY] =
g_signal_new ("dirty",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, dirty),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gimp_image_signals[UPDATE] =
g_signal_new ("update",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, 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_image_signals[UPDATE_GUIDE] =
g_signal_new ("update_guide",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, update_guide),
NULL, NULL,
gimp_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
gimp_image_signals[COLORMAP_CHANGED] =
g_signal_new ("colormap_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, colormap_changed),
NULL, NULL,
gimp_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
gimp_image_signals[UNDO_EVENT] =
g_signal_new ("undo_event",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpImageClass, undo_event),
NULL, NULL,
gimp_marshal_VOID__INT,
G_TYPE_NONE, 1,
G_TYPE_INT);
object_class->dispose = gimp_image_dispose;
object_class->finalize = gimp_image_finalize;
gimp_object_class->name_changed = gimp_image_name_changed;
viewable_class->invalidate_preview = gimp_image_invalidate_preview;
viewable_class->size_changed = gimp_image_size_changed;
viewable_class->get_preview = gimp_image_get_preview;
viewable_class->get_new_preview = gimp_image_get_new_preview;
klass->mode_changed = NULL;
klass->alpha_changed = NULL;
klass->floating_selection_changed = NULL;
klass->active_layer_changed = NULL;
klass->active_channel_changed = NULL;
klass->component_visibility_changed = NULL;
klass->component_active_changed = NULL;
klass->mask_changed = NULL;
klass->clean = NULL;
klass->dirty = NULL;
klass->update = NULL;
klass->update_guide = NULL;
klass->colormap_changed = gimp_image_real_colormap_changed;
klass->undo_event = NULL;
klass->undo = gimp_image_undo;
klass->redo = gimp_image_redo;
gimp_image_color_hash_init ();
}
static void
gimp_image_init (GimpImage *gimage)
{
gimage->ID = 0;
gimage->save_proc = NULL;
gimage->width = 0;
gimage->height = 0;
gimage->xresolution = 1.0;
gimage->yresolution = 1.0;
gimage->unit = GIMP_UNIT_INCH;
gimage->base_type = RGB;
gimage->cmap = NULL;
gimage->num_cols = 0;
gimage->dirty = 1;
gimage->undo_on = TRUE;
gimage->instance_count = 0;
gimage->disp_count = 0;
gimage->tattoo_state = 0;
gimage->shadow = NULL;
gimage->construct_flag = FALSE;
gimage->proj_type = RGBA_GIMAGE;
gimage->projection = NULL;
gimage->guides = NULL;
gimage->layers = gimp_list_new (GIMP_TYPE_LAYER,
GIMP_CONTAINER_POLICY_STRONG);
gimage->channels = gimp_list_new (GIMP_TYPE_CHANNEL,
GIMP_CONTAINER_POLICY_STRONG);
gimage->layer_stack = NULL;
gimage->active_layer = NULL;
gimage->active_channel = NULL;
gimage->floating_sel = NULL;
gimage->selection_mask = NULL;
gimage->parasites = gimp_parasite_list_new ();
gimage->paths = NULL;
gimage->qmask_state = FALSE;
gimage->qmask_inverted = FALSE;
gimage->qmask_color.r = 1.0;
gimage->qmask_color.g = 0.0;
gimage->qmask_color.b = 0.0;
gimage->qmask_color.a = 0.5;
gimage->undo_stack = NULL;
gimage->redo_stack = NULL;
gimage->undo_bytes = 0;
gimage->undo_levels = 0;
gimage->group_count = 0;
gimage->pushing_undo_group = UNDO_NULL;
gimage->new_undo_stack = gimp_undo_stack_new (gimage);
gimage->new_redo_stack = gimp_undo_stack_new (gimage);
gimage->comp_preview = NULL;
gimage->comp_preview_valid = FALSE;
}
static void
gimp_image_dispose (GObject *object)
{
GimpImage *gimage;
gimage = GIMP_IMAGE (object);
undo_free (gimage);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_image_finalize (GObject *object)
{
GimpImage *gimage;
gimage = GIMP_IMAGE (object);
if (gimage->gimp && gimage->gimp->image_table)
{
g_hash_table_remove (gimage->gimp->image_table,
GINT_TO_POINTER (gimage->ID));
gimage->gimp = NULL;
}
if (gimage->projection)
gimp_image_projection_free (gimage);
if (gimage->shadow)
gimp_image_free_shadow (gimage);
if (gimage->cmap)
{
g_free (gimage->cmap);
gimage->cmap = NULL;
}
if (gimage->layers)
{
g_object_unref (G_OBJECT (gimage->layers));
gimage->layers = NULL;
}
if (gimage->channels)
{
g_object_unref (G_OBJECT (gimage->channels));
gimage->channels = NULL;
}
if (gimage->layer_stack)
{
g_slist_free (gimage->layer_stack);
gimage->layer_stack = NULL;
}
if (gimage->selection_mask)
{
g_object_unref (G_OBJECT (gimage->selection_mask));
gimage->selection_mask = NULL;
}
if (gimage->comp_preview)
{
temp_buf_free (gimage->comp_preview);
gimage->comp_preview = NULL;
}
if (gimage->parasites)
{
g_object_unref (G_OBJECT (gimage->parasites));
gimage->parasites = NULL;
}
if (gimage->guides)
{
g_list_foreach (gimage->guides, (GFunc) g_free, NULL);
g_list_free (gimage->guides);
gimage->guides = NULL;
}
if (gimage->new_undo_stack)
{
g_object_unref (G_OBJECT (gimage->new_undo_stack));
gimage->new_undo_stack = NULL;
}
if (gimage->new_redo_stack)
{
g_object_unref (G_OBJECT (gimage->new_redo_stack));
gimage->new_redo_stack = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_image_name_changed (GimpObject *object)
{
GimpImage *gimage;
const gchar *name;
if (GIMP_OBJECT_CLASS (parent_class)->name_changed)
GIMP_OBJECT_CLASS (parent_class)->name_changed (object);
gimage = GIMP_IMAGE (object);
name = gimp_object_get_name (object);
if (! (name && strlen (name)))
{
g_free (object->name);
object->name = NULL;
}
}
static void
gimp_image_invalidate_preview (GimpViewable *viewable)
{
GimpImage *gimage;
if (GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview)
GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable);
gimage = GIMP_IMAGE (viewable);
gimage->comp_preview_valid = FALSE;
}
static void
gimp_image_size_changed (GimpViewable *viewable)
{
GimpImage *gimage;
if (GIMP_VIEWABLE_CLASS (parent_class)->size_changed)
GIMP_VIEWABLE_CLASS (parent_class)->size_changed (viewable);
gimage = GIMP_IMAGE (viewable);
gimp_image_invalidate_layer_previews (gimage);
gimp_image_invalidate_channel_previews (gimage);
}
static TempBuf *
gimp_image_get_preview (GimpViewable *viewable,
gint width,
gint height)
{
GimpImage *gimage;
gimage = GIMP_IMAGE (viewable);
if (gimage->comp_preview_valid &&
gimage->comp_preview->width == width &&
gimage->comp_preview->height == height)
{
/* The easy way */
return gimage->comp_preview;
}
else
{
/* The hard way */
if (gimage->comp_preview)
temp_buf_free (gimage->comp_preview);
/* Actually construct the composite preview from the layer previews!
* This might seem ridiculous, but it's actually the best way, given
* a number of unsavory alternatives.
*/
gimage->comp_preview = gimp_image_get_new_preview (viewable,
width, height);
gimage->comp_preview_valid = TRUE;
return gimage->comp_preview;
}
}
static TempBuf *
gimp_image_get_new_preview (GimpViewable *viewable,
gint width,
gint height)
{
GimpImage *gimage;
GimpLayer *layer;
GimpLayer *floating_sel;
PixelRegion src1PR, src2PR, maskPR;
PixelRegion *mask;
TempBuf *comp;
TempBuf *layer_buf;
TempBuf *mask_buf;
GList *list;
GSList *reverse_list = NULL;
gdouble ratio;
gint x, y, w, h;
gint x1, y1, x2, y2;
gint bytes;
gboolean construct_flag;
gint visible[MAX_CHANNELS] = { 1, 1, 1, 1 };
gint off_x, off_y;
gimage = GIMP_IMAGE (viewable);
ratio = (gdouble) width / (gdouble) gimage->width;
switch (gimp_image_base_type (gimage))
{
case RGB:
case INDEXED:
bytes = 4;
break;
case GRAY:
bytes = 2;
break;
default:
bytes = 0;
break;
}
/* The construction buffer */
comp = temp_buf_new (width, height, bytes, 0, 0, NULL);
temp_buf_data_clear (comp);
floating_sel = NULL;
for (list = GIMP_LIST (gimage->layers)->list;
list;
list = g_list_next (list))
{
layer = (GimpLayer *) list->data;
/* only add layers that are visible to the list */
if (gimp_drawable_get_visible (GIMP_DRAWABLE (layer)))
{
/* floating selections are added right above the layer
* they are attached to
*/
if (gimp_layer_is_floating_sel (layer))
{
floating_sel = layer;
}
else
{
if (floating_sel &&
floating_sel->fs.drawable == GIMP_DRAWABLE (layer))
{
reverse_list = g_slist_prepend (reverse_list, floating_sel);
}
reverse_list = g_slist_prepend (reverse_list, layer);
}
}
}
construct_flag = FALSE;
for (; reverse_list; reverse_list = g_slist_next (reverse_list))
{
layer = (GimpLayer *) reverse_list->data;
gimp_drawable_offsets (GIMP_DRAWABLE (layer), &off_x, &off_y);
x = (gint) RINT (ratio * off_x);
y = (gint) RINT (ratio * off_y);
w = (gint) RINT (ratio * gimp_drawable_width (GIMP_DRAWABLE (layer)));
h = (gint) RINT (ratio * gimp_drawable_height (GIMP_DRAWABLE (layer)));
if (w < 1 || h < 1)
continue;
x1 = CLAMP (x, 0, width);
y1 = CLAMP (y, 0, height);
x2 = CLAMP (x + w, 0, width);
y2 = CLAMP (y + h, 0, height);
src1PR.bytes = comp->bytes;
src1PR.x = x1;
src1PR.y = y1;
src1PR.w = (x2 - x1);
src1PR.h = (y2 - y1);
src1PR.rowstride = comp->width * src1PR.bytes;
src1PR.data = (temp_buf_data (comp) +
y1 * src1PR.rowstride + x1 * src1PR.bytes);
layer_buf = gimp_viewable_get_preview (GIMP_VIEWABLE (layer), w, h);
src2PR.bytes = layer_buf->bytes;
src2PR.w = src1PR.w;
src2PR.h = src1PR.h;
src2PR.x = src1PR.x;
src2PR.y = src1PR.y;
src2PR.rowstride = layer_buf->width * src2PR.bytes;
src2PR.data = (temp_buf_data (layer_buf) +
(y1 - y) * src2PR.rowstride +
(x1 - x) * src2PR.bytes);
if (layer->mask && layer->mask->apply_mask)
{
mask_buf = gimp_viewable_get_preview (GIMP_VIEWABLE (layer->mask),
w, h);
maskPR.bytes = mask_buf->bytes;
maskPR.rowstride = mask_buf->width;
maskPR.data = (mask_buf_data (mask_buf) +
(y1 - y) * maskPR.rowstride +
(x1 - x) * maskPR.bytes);
mask = &maskPR;
}
else
{
mask = NULL;
}
/* Based on the type of the layer, project the layer onto the
* composite preview...
* Indexed images are actually already converted to RGB and RGBA,
* so just project them as if they were type "intensity"
* Send in all TRUE for visible since that info doesn't matter
* for previews
*/
switch (gimp_drawable_type (GIMP_DRAWABLE (layer)))
{
case RGB_GIMAGE: case GRAY_GIMAGE: case INDEXED_GIMAGE:
if (! construct_flag)
initial_region (&src2PR, &src1PR,
mask, NULL, layer->opacity,
layer->mode, visible, INITIAL_INTENSITY);
else
combine_regions (&src1PR, &src2PR, &src1PR,
mask, NULL, layer->opacity,
layer->mode, visible, COMBINE_INTEN_A_INTEN);
break;
case RGBA_GIMAGE: case GRAYA_GIMAGE: case INDEXEDA_GIMAGE:
if (! construct_flag)
initial_region (&src2PR, &src1PR,
mask, NULL, layer->opacity,
layer->mode, visible, INITIAL_INTENSITY_ALPHA);
else
combine_regions (&src1PR, &src2PR, &src1PR,
mask, NULL, layer->opacity,
layer->mode, visible, COMBINE_INTEN_A_INTEN_A);
break;
default:
break;
}
construct_flag = TRUE;
}
g_slist_free (reverse_list);
return comp;
}
static void
gimp_image_real_colormap_changed (GimpImage *gimage,
gint ncol)
{
if (gimp_image_base_type (gimage) == INDEXED)
{
/* A colormap alteration affects the whole image */
gimp_image_update (gimage, 0, 0, gimage->width, gimage->height);
gimp_image_color_hash_invalidate (gimage, ncol);
}
}
/* public functions */
GimpImage *
gimp_image_new (Gimp *gimp,
gint width,
gint height,
GimpImageBaseType base_type)
{
GimpImage *gimage;
gint i;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
gimage = GIMP_IMAGE (g_object_new (GIMP_TYPE_IMAGE, NULL));
gimage->gimp = gimp;
gimage->ID = gimp->next_image_ID++;
g_hash_table_insert (gimp->image_table,
GINT_TO_POINTER (gimage->ID),
(gpointer) gimage);
gimage->width = width;
gimage->height = height;
gimage->base_type = base_type;
gimage->xresolution = gimp->config->default_xresolution;
gimage->yresolution = gimp->config->default_yresolution;
gimage->unit = gimp->config->default_units;
switch (base_type)
{
case RGB:
case GRAY:
break;
case INDEXED:
/* always allocate 256 colors for the colormap */
gimage->num_cols = 0;
gimage->cmap = (guchar *) g_malloc0 (COLORMAP_SIZE);
break;
default:
break;
}
/* set all color channels visible and active */
for (i = 0; i < MAX_CHANNELS; i++)
{
gimage->visible[i] = TRUE;
gimage->active[i] = TRUE;
}
/* create the selection mask */
gimage->selection_mask = gimp_channel_new_mask (gimage,
gimage->width,
gimage->height);
return gimage;
}
GimpImageBaseType
gimp_image_base_type (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), -1);
return gimage->base_type;
}
GimpImageType
gimp_image_base_type_with_alpha (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), -1);
switch (gimage->base_type)
{
case RGB:
return RGBA_GIMAGE;
case GRAY:
return GRAYA_GIMAGE;
case INDEXED:
return INDEXEDA_GIMAGE;
}
return RGB_GIMAGE;
}
CombinationMode
gimp_image_get_combination_mode (GimpImageType dest_type,
gint src_bytes)
{
return valid_combinations[dest_type][src_bytes];
}
gint
gimp_image_get_ID (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), -1);
return gimage->ID;
}
GimpImage *
gimp_image_get_by_ID (Gimp *gimp,
gint image_id)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
if (gimp->image_table == NULL)
return NULL;
return (GimpImage *) g_hash_table_lookup (gimp->image_table,
GINT_TO_POINTER (image_id));
}
void
gimp_image_set_filename (GimpImage *gimage,
const gchar *filename)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimp_object_set_name (GIMP_OBJECT (gimage), filename);
}
const gchar *
gimp_image_get_filename (const GimpImage *gimage)
{
const gchar *filename;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
filename = gimp_object_get_name (GIMP_OBJECT (gimage));
return filename ? filename : _("Untitled");
}
void
gimp_image_set_save_proc (GimpImage *gimage,
PlugInProcDef *proc)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimage->save_proc = proc;
}
PlugInProcDef *
gimp_image_get_save_proc (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimage->save_proc;
}
void
gimp_image_set_resolution (GimpImage *gimage,
gdouble xresolution,
gdouble yresolution)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
/* don't allow to set the resolution out of bounds */
if (xresolution < GIMP_MIN_RESOLUTION || xresolution > GIMP_MAX_RESOLUTION ||
yresolution < GIMP_MIN_RESOLUTION || yresolution > GIMP_MAX_RESOLUTION)
return;
if ((ABS (gimage->xresolution - xresolution) >= 1e-5) ||
(ABS (gimage->yresolution - yresolution) >= 1e-5))
{
undo_push_resolution (gimage);
gimage->xresolution = xresolution;
gimage->yresolution = yresolution;
gimp_image_resolution_changed (gimage);
gimp_viewable_size_changed (GIMP_VIEWABLE (gimage));
}
}
void
gimp_image_get_resolution (const GimpImage *gimage,
gdouble *xresolution,
gdouble *yresolution)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (xresolution && yresolution);
*xresolution = gimage->xresolution;
*yresolution = gimage->yresolution;
}
void
gimp_image_resolution_changed (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[RESOLUTION_CHANGED], 0);
}
void
gimp_image_set_unit (GimpImage *gimage,
GimpUnit unit)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
if (gimage->unit != unit)
{
undo_push_resolution (gimage);
gimage->unit = unit;
gimp_image_unit_changed (gimage);
}
}
GimpUnit
gimp_image_get_unit (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), GIMP_UNIT_INCH);
return gimage->unit;
}
void
gimp_image_unit_changed (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[UNIT_CHANGED], 0);
}
gint
gimp_image_get_width (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), 0);
return gimage->width;
}
gint
gimp_image_get_height (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), 0);
return gimage->height;
}
gboolean
gimp_image_is_empty (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), TRUE);
return (gimp_container_num_children (gimage->layers) == 0);
}
GimpLayer *
gimp_image_floating_sel (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
if (gimage->floating_sel == NULL)
return NULL;
else
return gimage->floating_sel;
}
void
gimp_image_floating_selection_changed (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[FLOATING_SELECTION_CHANGED], 0);
}
guchar *
gimp_image_get_colormap (const GimpImage *gimage)
{
return gimp_drawable_cmap (gimp_image_active_drawable (gimage));
}
void
gimp_image_colormap_changed (GimpImage *gimage,
gint col)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (col < gimage->num_cols);
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[COLORMAP_CHANGED], 0,
col);
}
GimpChannel *
gimp_image_get_mask (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimage->selection_mask;
}
void
gimp_image_mask_changed (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[MASK_CHANGED], 0);
}
void
gimp_image_set_component_active (GimpImage *gimage,
ChannelType type,
gboolean active)
{
gint pixel = -1;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
switch (type)
{
case RED_CHANNEL: pixel = RED_PIX; break;
case GREEN_CHANNEL: pixel = GREEN_PIX; break;
case BLUE_CHANNEL: pixel = BLUE_PIX; break;
case GRAY_CHANNEL: pixel = GRAY_PIX; break;
case INDEXED_CHANNEL: pixel = INDEXED_PIX; break;
case ALPHA_CHANNEL:
switch (gimp_image_base_type (gimage))
{
case RGB: pixel = ALPHA_PIX; break;
case GRAY: pixel = ALPHA_G_PIX; break;
case INDEXED: pixel = ALPHA_I_PIX; break;
}
break;
default:
break;
}
if (pixel != -1 && active != gimage->active[pixel])
{
gimage->active[pixel] = active ? TRUE : FALSE;
/* If there is an active channel and we mess with the components,
* the active channel gets unset...
*/
gimp_image_unset_active_channel (gimage);
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[COMPONENT_ACTIVE_CHANGED], 0,
type);
}
}
gboolean
gimp_image_get_component_active (const GimpImage *gimage,
ChannelType type)
{
/* No sanity checking here... */
switch (type)
{
case RED_CHANNEL: return gimage->active[RED_PIX]; break;
case GREEN_CHANNEL: return gimage->active[GREEN_PIX]; break;
case BLUE_CHANNEL: return gimage->active[BLUE_PIX]; break;
case GRAY_CHANNEL: return gimage->active[GRAY_PIX]; break;
case INDEXED_CHANNEL: return gimage->active[INDEXED_PIX]; break;
case ALPHA_CHANNEL:
switch (gimp_image_base_type (gimage))
{
case RGB: return gimage->active[ALPHA_PIX]; break;
case GRAY: return gimage->active[ALPHA_G_PIX]; break;
case INDEXED: return gimage->active[ALPHA_I_PIX]; break;
}
break;
default:
break;
}
return FALSE;
}
void
gimp_image_get_active_components (GimpImage *gimage,
GimpDrawable *drawable,
gint *active)
{
GimpLayer *layer;
gint i;
/* first, blindly copy the gimage active channels */
for (i = 0; i < MAX_CHANNELS; i++)
active[i] = gimage->active[i];
/* If the drawable is a channel (a saved selection, etc.)
* make sure that the alpha channel is not valid
*/
if (GIMP_IS_CHANNEL (drawable))
{
active[ALPHA_G_PIX] = 0; /* no alpha values in channels */
}
else
{
/* otherwise, check whether preserve transparency is
* enabled in the layer and if the layer has alpha
*/
if (GIMP_IS_LAYER (drawable))
{
layer = GIMP_LAYER (drawable);
if (gimp_layer_has_alpha (layer) && layer->preserve_trans)
active[gimp_drawable_bytes (drawable) - 1] = 0;
}
}
}
void
gimp_image_set_component_visible (GimpImage *gimage,
ChannelType type,
gboolean visible)
{
gint pixel = -1;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
switch (type)
{
case RED_CHANNEL: pixel = RED_PIX; break;
case GREEN_CHANNEL: pixel = GREEN_PIX; break;
case BLUE_CHANNEL: pixel = BLUE_PIX; break;
case GRAY_CHANNEL: pixel = GRAY_PIX; break;
case INDEXED_CHANNEL: pixel = INDEXED_PIX; break;
case ALPHA_CHANNEL:
switch (gimp_image_base_type (gimage))
{
case RGB: pixel = ALPHA_PIX; break;
case GRAY: pixel = ALPHA_G_PIX; break;
case INDEXED: pixel = ALPHA_I_PIX; break;
}
break;
default:
break;
}
if (pixel != -1 && visible != gimage->visible[pixel])
{
gimage->visible[pixel] = visible ? TRUE : FALSE;
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[COMPONENT_VISIBILITY_CHANGED], 0,
type);
gimp_image_update (gimage, 0, 0, gimage->width, gimage->height);
}
}
gboolean
gimp_image_get_component_visible (const GimpImage *gimage,
ChannelType type)
{
/* No sanity checking here... */
switch (type)
{
case RED_CHANNEL: return gimage->visible[RED_PIX]; break;
case GREEN_CHANNEL: return gimage->visible[GREEN_PIX]; break;
case BLUE_CHANNEL: return gimage->visible[BLUE_PIX]; break;
case GRAY_CHANNEL: return gimage->visible[GRAY_PIX]; break;
case INDEXED_CHANNEL: return gimage->visible[INDEXED_PIX]; break;
case ALPHA_CHANNEL:
switch (gimp_image_base_type (gimage))
{
case RGB: return gimage->visible[ALPHA_PIX]; break;
case GRAY: return gimage->visible[ALPHA_G_PIX]; break;
case INDEXED: return gimage->visible[ALPHA_I_PIX]; break;
}
break;
default:
break;
}
return FALSE;
}
void
gimp_image_mode_changed (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[MODE_CHANGED], 0);
}
void
gimp_image_alpha_changed (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[ALPHA_CHANGED], 0);
}
void
gimp_image_update (GimpImage *gimage,
gint x,
gint y,
gint width,
gint height)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[UPDATE], 0,
x, y, width, height);
}
void
gimp_image_update_guide (GimpImage *gimage,
GimpGuide *guide)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (guide != NULL);
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[UPDATE_GUIDE], 0,
guide);
}
void
gimp_image_selection_control (GimpImage *gimage,
GimpSelectionControl control)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[SELECTION_CONTROL], 0,
control);
}
void
gimp_image_qmask_changed (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[QMASK_CHANGED], 0);
}
/* undo */
gboolean
gimp_image_undo_is_enabled (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
return gimage->undo_on;
}
gboolean
gimp_image_undo_enable (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
/* Free all undo steps as they are now invalidated */
undo_free (gimage);
return gimp_image_undo_thaw (gimage);
}
gboolean
gimp_image_undo_disable (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
return gimp_image_undo_freeze (gimage);
}
gboolean
gimp_image_undo_freeze (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
gimage->undo_on = FALSE;
return TRUE;
}
gboolean
gimp_image_undo_thaw (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
gimage->undo_on = TRUE;
return TRUE;
}
void
gimp_image_undo_event (GimpImage *gimage,
gint event)
{
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[UNDO_EVENT], 0,
event);
}
/* NOTE about the gimage->dirty counter:
* If 0, then the image is clean (ie, copy on disk is the same as the one
* in memory).
* If positive, then that's the number of dirtying operations done
* on the image since the last save.
* If negative, then user has hit undo and gone back in time prior
* to the saved copy. Hitting redo will eventually come back to
* the saved copy.
*
* The image is dirty (ie, needs saving) if counter is non-zero.
*
* If the counter is around 10000, this is due to undo-ing back
* before a saved version, then mutating the image (thus destroying
* the redo stack). Once this has happened, it's impossible to get
* the image back to the state on disk, since the redo info has been
* freed. See undo.c for the gorey details.
*/
/*
* NEVER CALL gimp_image_dirty() directly!
*
* If your code has just dirtied the image, push an undo instead.
* Failing that, push the trivial undo which tells the user the
* command is not undoable: undo_push_cantundo() (But really, it would
* be best to push a proper undo). If you just dirty the image
* without pushing an undo then the dirty count is increased, but
* popping that many undo actions won't lead to a clean image.
*/
gint
gimp_image_dirty (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
gimage->dirty++;
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[DIRTY], 0);
TRC (("dirty %d -> %d\n", gimage->dirty-1, gimage->dirty));
return gimage->dirty;
}
gint
gimp_image_clean (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
gimage->dirty--;
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[CLEAN], 0);
TRC (("clean %d -> %d\n", gimage->dirty+1, gimage->dirty));
return gimage->dirty;
}
void
gimp_image_clean_all (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimage->dirty = 0;
g_signal_emit (G_OBJECT (gimage), gimp_image_signals[CLEAN], 0);
}
/* color transforms / utilities */
/* Get rid of these! A "foreground" is an UI concept.. */
void
gimp_image_get_foreground (const GimpImage *gimage,
const GimpDrawable *drawable,
guchar *fg)
{
GimpRGB color;
guchar pfg[3];
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (! drawable || GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (fg != NULL);
gimp_context_get_foreground (gimp_get_current_context (gimage->gimp), &color);
gimp_rgb_get_uchar (&color, &pfg[0], &pfg[1], &pfg[2]);
gimp_image_transform_color (gimage, drawable, pfg, fg, RGB);
}
void
gimp_image_get_background (const GimpImage *gimage,
const GimpDrawable *drawable,
guchar *bg)
{
GimpRGB color;
guchar pbg[3];
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (! drawable || GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (bg != NULL);
gimp_context_get_background (gimp_get_current_context (gimage->gimp), &color);
gimp_rgb_get_uchar (&color, &pbg[0], &pbg[1], &pbg[2]);
gimp_image_transform_color (gimage, drawable, pbg, bg, RGB);
}
void
gimp_image_get_color (const GimpImage *gimage,
GimpImageType d_type,
guchar *rgb,
guchar *src)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
switch (d_type)
{
case RGB_GIMAGE: case RGBA_GIMAGE:
map_to_color (0, NULL, src, rgb);
break;
case GRAY_GIMAGE: case GRAYA_GIMAGE:
map_to_color (1, NULL, src, rgb);
break;
case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
map_to_color (2, gimage->cmap, src, rgb);
break;
}
}
void
gimp_image_transform_color (const GimpImage *gimage,
const GimpDrawable *drawable,
guchar *src,
guchar *dest,
GimpImageBaseType type)
{
GimpImageType d_type;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
d_type = (drawable != NULL) ? gimp_drawable_type (drawable) :
gimp_image_base_type_with_alpha (gimage);
switch (type)
{
case RGB:
switch (d_type)
{
case RGB_GIMAGE: case RGBA_GIMAGE:
/* Straight copy */
*dest++ = *src++;
*dest++ = *src++;
*dest++ = *src++;
break;
case GRAY_GIMAGE: case GRAYA_GIMAGE:
/* NTSC conversion */
*dest = INTENSITY (src[RED_PIX],
src[GREEN_PIX],
src[BLUE_PIX]);
break;
case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
/* Least squares method */
*dest = gimp_image_color_hash_rgb_to_indexed (gimage,
src[RED_PIX],
src[GREEN_PIX],
src[BLUE_PIX]);
break;
}
break;
case GRAY:
switch (d_type)
{
case RGB_GIMAGE: case RGBA_GIMAGE:
/* Gray to RG&B */
*dest++ = *src;
*dest++ = *src;
*dest++ = *src;
break;
case GRAY_GIMAGE: case GRAYA_GIMAGE:
/* Straight copy */
*dest = *src;
break;
case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
/* Least squares method */
*dest = gimp_image_color_hash_rgb_to_indexed (gimage,
src[GRAY_PIX],
src[GRAY_PIX],
src[GRAY_PIX]);
break;
}
break;
default:
break;
}
}
/* shadow tiles */
TileManager *
gimp_image_shadow (GimpImage *gimage,
gint width,
gint height,
gint bpp)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
if (gimage->shadow)
{
if ((width != tile_manager_width (gimage->shadow)) ||
(height != tile_manager_height (gimage->shadow)) ||
(bpp != tile_manager_bpp (gimage->shadow)))
{
gimp_image_free_shadow (gimage);
}
else
{
return gimage->shadow;
}
}
gimage->shadow = tile_manager_new (width, height, bpp);
return gimage->shadow;
}
void
gimp_image_free_shadow (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
if (gimage->shadow)
{
tile_manager_destroy (gimage->shadow);
gimage->shadow = NULL;
}
}
/* combine functions */
void
gimp_image_apply_image (GimpImage *gimage,
GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean undo,
gint opacity,
GimpLayerModeEffects mode,
/* alternative to using drawable tiles as src1: */
TileManager *src1_tiles,
gint x,
gint y)
{
GimpChannel *mask;
gint x1, y1, x2, y2;
gint offset_x, offset_y;
PixelRegion src1PR, destPR, maskPR;
gint operation;
gint active [MAX_CHANNELS];
g_return_if_fail (GIMP_IS_IMAGE (gimage));
/* get the selection mask if one exists */
mask = (gimp_image_mask_is_empty (gimage) ?
NULL : gimp_image_get_mask (gimage));
/* configure the active channel array */
gimp_image_get_active_components (gimage, drawable, active);
/* determine what sort of operation is being attempted and
* if it's actually legal...
*/
operation = gimp_image_get_combination_mode (gimp_drawable_type (drawable),
src2PR->bytes);
if (operation == -1)
{
g_warning ("%s: illegal parameters.", G_GNUC_PRETTY_FUNCTION);
return;
}
/* get the layer offsets */
gimp_drawable_offsets (drawable, &offset_x, &offset_y);
/* make sure the image application coordinates are within gimage bounds */
x1 = CLAMP (x, 0, gimp_drawable_width (drawable));
y1 = CLAMP (y, 0, gimp_drawable_height (drawable));
x2 = CLAMP (x + src2PR->w, 0, gimp_drawable_width (drawable));
y2 = CLAMP (y + src2PR->h, 0, gimp_drawable_height (drawable));
if (mask)
{
/* make sure coordinates are in mask bounds ...
* we need to add the layer offset to transform coords
* into the mask coordinate system
*/
x1 = CLAMP (x1, -offset_x, gimp_drawable_width (GIMP_DRAWABLE (mask))-offset_x);
y1 = CLAMP (y1, -offset_y, gimp_drawable_height(GIMP_DRAWABLE (mask))-offset_y);
x2 = CLAMP (x2, -offset_x, gimp_drawable_width (GIMP_DRAWABLE (mask))-offset_x);
y2 = CLAMP (y2, -offset_y, gimp_drawable_height(GIMP_DRAWABLE (mask))-offset_y);
}
/* If the calling procedure specified an undo step... */
if (undo)
undo_push_image (gimp_drawable_gimage (drawable), drawable, x1, y1, x2, y2);
/* configure the pixel regions
* If an alternative to using the drawable's data as src1 was provided...
*/
if (src1_tiles)
pixel_region_init (&src1PR, src1_tiles,
x1, y1, (x2 - x1), (y2 - y1), FALSE);
else
pixel_region_init (&src1PR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
pixel_region_resize (src2PR,
src2PR->x + (x1 - x), src2PR->y + (y1 - y),
(x2 - x1), (y2 - y1));
if (mask)
{
gint mx, my;
/* configure the mask pixel region
* don't use x1 and y1 because they are in layer
* coordinate system. Need mask coordinate system
*/
mx = x1 + offset_x;
my = y1 + offset_y;
pixel_region_init (&maskPR,
gimp_drawable_data (GIMP_DRAWABLE (mask)),
mx, my,
(x2 - x1), (y2 - y1),
FALSE);
combine_regions (&src1PR, src2PR, &destPR, &maskPR, NULL,
opacity, mode, active, operation);
}
else
{
combine_regions (&src1PR, src2PR, &destPR, NULL, NULL,
opacity, mode, active, operation);
}
}
/* Similar to gimp_image_apply_image but works in "replace" mode (i.e.
transparent pixels in src2 make the result transparent rather
than opaque.
Takes an additional mask pixel region as well.
*/
void
gimp_image_replace_image (GimpImage *gimage,
GimpDrawable *drawable,
PixelRegion *src2PR,
gboolean undo,
gint opacity,
PixelRegion *maskPR,
gint x,
gint y)
{
GimpChannel *mask;
gint x1, y1, x2, y2;
gint offset_x, offset_y;
PixelRegion src1PR, destPR;
PixelRegion mask2PR, tempPR;
guchar *temp_data;
gint operation;
gint active [MAX_CHANNELS];
g_return_if_fail (GIMP_IS_IMAGE (gimage));
/* get the selection mask if one exists */
mask = (gimp_image_mask_is_empty (gimage)) ? NULL : gimp_image_get_mask (gimage);
/* configure the active channel array */
gimp_image_get_active_components (gimage, drawable, active);
/* determine what sort of operation is being attempted and
* if it's actually legal...
*/
operation = gimp_image_get_combination_mode (gimp_drawable_type (drawable),
src2PR->bytes);
if (operation == -1)
{
g_warning ("%s: illegal parameters.", G_GNUC_PRETTY_FUNCTION);
return;
}
/* get the layer offsets */
gimp_drawable_offsets (drawable, &offset_x, &offset_y);
/* make sure the image application coordinates are within gimage bounds */
x1 = CLAMP (x, 0, gimp_drawable_width (drawable));
y1 = CLAMP (y, 0, gimp_drawable_height (drawable));
x2 = CLAMP (x + src2PR->w, 0, gimp_drawable_width (drawable));
y2 = CLAMP (y + src2PR->h, 0, gimp_drawable_height (drawable));
if (mask)
{
/* make sure coordinates are in mask bounds ...
* we need to add the layer offset to transform coords
* into the mask coordinate system
*/
x1 = CLAMP (x1, -offset_x, gimp_drawable_width (GIMP_DRAWABLE (mask))-offset_x);
y1 = CLAMP (y1, -offset_y, gimp_drawable_height(GIMP_DRAWABLE (mask))-offset_y);
x2 = CLAMP (x2, -offset_x, gimp_drawable_width (GIMP_DRAWABLE (mask))-offset_x);
y2 = CLAMP (y2, -offset_y, gimp_drawable_height(GIMP_DRAWABLE (mask))-offset_y);
}
/* If the calling procedure specified an undo step... */
if (undo)
gimp_drawable_apply_image (drawable, x1, y1, x2, y2, NULL, FALSE);
/* configure the pixel regions
* If an alternative to using the drawable's data as src1 was provided...
*/
pixel_region_init (&src1PR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, gimp_drawable_data (drawable),
x1, y1, (x2 - x1), (y2 - y1), TRUE);
pixel_region_resize (src2PR,
src2PR->x + (x1 - x), src2PR->y + (y1 - y),
(x2 - x1), (y2 - y1));
if (mask)
{
int mx, my;
/* configure the mask pixel region
* don't use x1 and y1 because they are in layer
* coordinate system. Need mask coordinate system
*/
mx = x1 + offset_x;
my = y1 + offset_y;
pixel_region_init (&mask2PR,
gimp_drawable_data (GIMP_DRAWABLE (mask)),
mx, my,
(x2 - x1), (y2 - y1),
FALSE);
tempPR.bytes = 1;
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = x2 - x1;
tempPR.h = y2 - y1;
tempPR.rowstride = tempPR.w * tempPR.bytes;
temp_data = g_malloc (tempPR.h * tempPR.rowstride);
tempPR.data = temp_data;
copy_region (&mask2PR, &tempPR);
/* apparently, region operations can mutate some PR data. */
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = x2 - x1;
tempPR.h = y2 - y1;
tempPR.data = temp_data;
apply_mask_to_region (&tempPR, maskPR, OPAQUE_OPACITY);
tempPR.x = 0;
tempPR.y = 0;
tempPR.w = x2 - x1;
tempPR.h = y2 - y1;
tempPR.data = temp_data;
combine_regions_replace (&src1PR, src2PR, &destPR, &tempPR, NULL,
opacity, active, operation);
g_free (temp_data);
}
else
{
combine_regions_replace (&src1PR, src2PR, &destPR, maskPR, NULL,
opacity, active, operation);
}
}
/* parasites */
GimpParasite *
gimp_image_parasite_find (const GimpImage *gimage,
const gchar *name)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimp_parasite_list_find (gimage->parasites, name);
}
static void
list_func (gchar *key,
GimpParasite *p,
gchar ***cur)
{
*(*cur)++ = (gchar *) g_strdup (key);
}
gchar **
gimp_image_parasite_list (const GimpImage *gimage,
gint *count)
{
gchar **list;
gchar **cur;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
*count = gimp_parasite_list_length (gimage->parasites);
cur = list = g_new (gchar*, *count);
gimp_parasite_list_foreach (gimage->parasites, (GHFunc) list_func, &cur);
return list;
}
void
gimp_image_parasite_attach (GimpImage *gimage,
GimpParasite *parasite)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage) && parasite != NULL);
/* only set the dirty bit manually if we can be saved and the new
parasite differs from the current one and we aren't undoable */
if (gimp_parasite_is_undoable (parasite))
undo_push_image_parasite (gimage, parasite);
/* We used to push an cantundo on te stack here. This made the undo stack
unusable (NULL on the stack) and prevented people from undoing after a
save (since most save plug-ins attach an undoable comment parasite).
Now we simply attach the parasite without pushing an undo. That way it's
undoable but does not block the undo system. --Sven
*/
gimp_parasite_list_add (gimage->parasites, parasite);
if (gimp_parasite_has_flag (parasite, GIMP_PARASITE_ATTACH_PARENT))
{
gimp_parasite_shift_parent (parasite);
gimp_parasite_attach (gimage->gimp, parasite);
}
}
void
gimp_image_parasite_detach (GimpImage *gimage,
const gchar *parasite)
{
GimpParasite *p;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (parasite != NULL);
if (!(p = gimp_parasite_list_find (gimage->parasites, parasite)))
return;
if (gimp_parasite_is_undoable (p))
undo_push_image_parasite_remove (gimage, gimp_parasite_name (p));
gimp_parasite_list_remove (gimage->parasites, parasite);
}
/* tattoos */
GimpTattoo
gimp_image_get_new_tattoo (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), 0);
gimage->tattoo_state++;
if (gimage->tattoo_state <= 0)
g_warning ("%s: Tattoo state corrupted "
"(integer overflow).", G_GNUC_PRETTY_FUNCTION);
return gimage->tattoo_state;
}
GimpTattoo
gimp_image_get_tattoo_state (GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), 0);
return gimage->tattoo_state;
}
gboolean
gimp_image_set_tattoo_state (GimpImage *gimage,
GimpTattoo val)
{
GList *list;
gboolean retval = TRUE;
GimpChannel *channel;
GimpTattoo maxval = 0;
Path *pptr = NULL;
PathList *plist;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
for (list = GIMP_LIST (gimage->layers)->list;
list;
list = g_list_next (list))
{
GimpTattoo ltattoo;
ltattoo = gimp_drawable_get_tattoo (GIMP_DRAWABLE (list->data));
if (ltattoo > maxval)
maxval = ltattoo;
if (gimp_image_get_channel_by_tattoo (gimage, ltattoo) != NULL)
{
retval = FALSE; /* Oopps duplicated tattoo in channel */
}
/* Now check path an't got this tattoo */
if (path_get_path_by_tattoo (gimage, ltattoo) != NULL)
{
retval = FALSE; /* Oopps duplicated tattoo in layer */
}
}
/* Now check that the paths channel tattoos don't overlap */
for (list = GIMP_LIST (gimage->channels)->list;
list;
list = g_list_next (list))
{
GimpTattoo ctattoo;
channel = (GimpChannel *) list->data;
ctattoo = gimp_drawable_get_tattoo (GIMP_DRAWABLE (channel));
if (ctattoo > maxval)
maxval = ctattoo;
/* Now check path an't got this tattoo */
if (path_get_path_by_tattoo (gimage, ctattoo) != NULL)
{
retval = FALSE; /* Oopps duplicated tattoo in layer */
}
}
/* Find the max tatto value in the paths */
plist = gimage->paths;
if (plist && plist->bz_paths)
{
GimpTattoo ptattoo;
GSList *pl;
for (pl = plist->bz_paths; pl; pl = g_slist_next (pl))
{
pptr = pl->data;
ptattoo = path_get_tattoo (pptr);
if (ptattoo > maxval)
maxval = ptattoo;
}
}
if (val < maxval)
retval = FALSE;
/* Must check the state is valid */
if (retval == TRUE)
gimage->tattoo_state = val;
return retval;
}
/* layers / channels / paths */
GimpContainer *
gimp_image_get_layers (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimage->layers;
}
GimpContainer *
gimp_image_get_channels (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimage->channels;
}
void
gimp_image_set_paths (GimpImage *gimage,
PathList *paths)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimage->paths = paths;
}
PathList *
gimp_image_get_paths (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimage->paths;
}
GimpDrawable *
gimp_image_active_drawable (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
/* If there is an active channel (a saved selection, etc.),
* we ignore the active layer
*/
if (gimage->active_channel)
{
return GIMP_DRAWABLE (gimage->active_channel);
}
else if (gimage->active_layer)
{
GimpLayer *layer;
layer = gimage->active_layer;
if (layer->mask && layer->mask->edit_mask)
return GIMP_DRAWABLE (layer->mask);
else
return GIMP_DRAWABLE (layer);
}
return NULL;
}
GimpLayer *
gimp_image_get_active_layer (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimage->active_layer;
}
GimpChannel *
gimp_image_get_active_channel (const GimpImage *gimage)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
return gimage->active_channel;
}
GimpLayer *
gimp_image_set_active_layer (GimpImage *gimage,
GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
/* First, find the layer in the gimage
* If it isn't valid, find the first layer that is
*/
if (! gimp_container_have (gimage->layers, GIMP_OBJECT (layer)))
layer = (GimpLayer *) gimp_container_get_child_by_index (gimage->layers, 0);
if (layer)
{
/* Configure the layer stack to reflect this change */
gimage->layer_stack = g_slist_remove (gimage->layer_stack, layer);
gimage->layer_stack = g_slist_prepend (gimage->layer_stack, layer);
/* invalidate the selection boundary because of a layer modification */
gimp_layer_invalidate_boundary (layer);
}
if (layer != gimage->active_layer)
{
gimage->active_layer = layer;
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[ACTIVE_LAYER_CHANGED], 0);
if (gimage->active_channel)
{
gimage->active_channel = NULL;
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[ACTIVE_CHANNEL_CHANGED], 0);
}
}
/* return the layer */
return layer;
}
GimpChannel *
gimp_image_set_active_channel (GimpImage *gimage,
GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
/* Not if there is a floating selection */
if (gimp_image_floating_sel (gimage))
return NULL;
/* First, find the channel
* If it doesn't exist, find the first channel that does
*/
if (! gimp_container_have (gimage->channels, GIMP_OBJECT (channel)))
channel = (GimpChannel *) gimp_container_get_child_by_index (gimage->channels, 0);
if (channel != gimage->active_channel)
{
gimage->active_channel = channel;
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[ACTIVE_CHANNEL_CHANGED], 0);
if (gimage->active_layer)
{
gimage->active_layer = NULL;
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[ACTIVE_LAYER_CHANGED], 0);
}
}
/* return the channel */
return channel;
}
GimpChannel *
gimp_image_unset_active_channel (GimpImage *gimage)
{
GimpChannel *channel;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
channel = gimp_image_get_active_channel (gimage);
if (channel)
{
gimage->active_channel = NULL;
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[ACTIVE_CHANNEL_CHANGED], 0);
if (gimage->layer_stack)
{
GimpLayer *layer;
layer = (GimpLayer *) gimage->layer_stack->data;
gimp_image_set_active_layer (gimage, layer);
}
}
return channel;
}
gint
gimp_image_get_layer_index (const GimpImage *gimage,
const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), -1);
g_return_val_if_fail (GIMP_IS_LAYER (layer), -1);
return gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (layer));
}
gint
gimp_image_get_channel_index (const GimpImage *gimage,
const GimpChannel *channel)
{
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), -1);
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), -1);
return gimp_container_get_child_index (gimage->channels,
GIMP_OBJECT (channel));
}
GimpLayer *
gimp_image_get_layer_by_tattoo (const GimpImage *gimage,
GimpTattoo tattoo)
{
GimpLayer *layer;
GList *list;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
for (list = GIMP_LIST (gimage->layers)->list;
list;
list = g_list_next (list))
{
layer = (GimpLayer *) list->data;
if (gimp_drawable_get_tattoo (GIMP_DRAWABLE (layer)) == tattoo)
return layer;
}
return NULL;
}
GimpChannel *
gimp_image_get_channel_by_tattoo (const GimpImage *gimage,
GimpTattoo tattoo)
{
GimpChannel *channel;
GList *list;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
for (list = GIMP_LIST (gimage->channels)->list;
list;
list = g_list_next (list))
{
channel = (GimpChannel *) list->data;
if (gimp_drawable_get_tattoo (GIMP_DRAWABLE (channel)) == tattoo)
return channel;
}
return NULL;
}
GimpChannel *
gimp_image_get_channel_by_name (const GimpImage *gimage,
const gchar *name)
{
GimpChannel *channel;
GList *list;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
for (list = GIMP_LIST (gimage->channels)->list;
list;
list = g_list_next (list))
{
channel = (GimpChannel *) list->data;
if (! strcmp (gimp_object_get_name (GIMP_OBJECT (channel)), name))
return channel;
}
return NULL;
}
gboolean
gimp_image_add_layer (GimpImage *gimage,
GimpLayer *layer,
gint position)
{
LayerUndo *lu;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
if (GIMP_DRAWABLE (layer)->gimage != NULL &&
GIMP_DRAWABLE (layer)->gimage != gimage)
{
g_warning ("%s: attempting to add layer to wrong image.",
G_GNUC_PRETTY_FUNCTION);
return FALSE;
}
if (gimp_container_have (gimage->layers, GIMP_OBJECT (layer)))
{
g_warning ("%s: trying to add layer to image twice.",
G_GNUC_PRETTY_FUNCTION);
return FALSE;
}
/* Prepare a layer undo and push it */
lu = g_new (LayerUndo, 1);
lu->layer = layer;
lu->prev_position = 0;
lu->prev_layer = gimp_image_get_active_layer (gimage);
undo_push_layer (gimage, LAYER_ADD_UNDO, lu);
/* If the layer is a floating selection, set the ID */
if (gimp_layer_is_floating_sel (layer))
gimage->floating_sel = layer;
/* let the layer know about the gimage */
gimp_drawable_set_gimage (GIMP_DRAWABLE (layer), gimage);
/* If the layer has a mask, set the mask's gimage */
if (layer->mask)
{
gimp_drawable_set_gimage (GIMP_DRAWABLE (layer->mask), gimage);
}
/* add the layer to the list at the specified position */
if (position == -1)
{
GimpLayer *active_layer;
active_layer = gimp_image_get_active_layer (gimage);
if (active_layer)
{
position = gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (active_layer));
}
else
{
position = 0;
}
}
/* If there is a floating selection (and this isn't it!),
* make sure the insert position is greater than 0
*/
if (position == 0 &&
gimp_image_floating_sel (gimage) &&
(gimage->floating_sel != layer))
{
position = 1;
}
gimp_container_insert (gimage->layers, GIMP_OBJECT (layer), position);
g_object_unref (G_OBJECT (layer));
/* notify the layers dialog of the currently active layer */
gimp_image_set_active_layer (gimage, layer);
/* update the new layer's area */
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_drawable_width (GIMP_DRAWABLE (layer)),
gimp_drawable_height (GIMP_DRAWABLE (layer)));
return TRUE;
}
void
gimp_image_remove_layer (GimpImage *gimage,
GimpLayer *layer)
{
LayerUndo *lu;
gint x, y, w, h;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_container_have (gimage->layers,
GIMP_OBJECT (layer)));
/* Push a layer undo */
lu = g_new (LayerUndo, 1);
lu->layer = layer;
lu->prev_position = gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (layer));
lu->prev_layer = layer;
undo_push_layer (gimage, LAYER_REMOVE_UNDO, lu);
g_object_ref (G_OBJECT (layer));
gimp_container_remove (gimage->layers, GIMP_OBJECT (layer));
gimage->layer_stack = g_slist_remove (gimage->layer_stack, layer);
/* If this was the floating selection, reset the fs pointer */
if (gimage->floating_sel == layer)
{
gimage->floating_sel = NULL;
floating_sel_reset (layer);
}
if (layer == gimp_image_get_active_layer (gimage))
{
if (gimage->layer_stack)
{
gimp_image_set_active_layer (gimage, gimage->layer_stack->data);
}
else
{
gimage->active_layer = NULL;
g_signal_emit (G_OBJECT (gimage),
gimp_image_signals[ACTIVE_LAYER_CHANGED], 0);
}
}
/* Send out REMOVED signal from layer */
gimp_drawable_removed (GIMP_DRAWABLE (layer));
gimp_drawable_offsets (GIMP_DRAWABLE (layer), &x, &y);
w = gimp_drawable_width (GIMP_DRAWABLE (layer));
h = gimp_drawable_height (GIMP_DRAWABLE (layer));
g_object_unref (G_OBJECT (layer));
gimp_image_update (gimage, x, y, w, h);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimage));
}
gboolean
gimp_image_raise_layer (GimpImage *gimage,
GimpLayer *layer)
{
gint curpos;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
curpos = gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (layer));
/* is this the top layer already? */
if (curpos == 0)
{
g_message (_("Layer cannot be raised higher."));
return FALSE;
}
return gimp_image_position_layer (gimage, layer, curpos - 1, TRUE);
}
gboolean
gimp_image_lower_layer (GimpImage *gimage,
GimpLayer *layer)
{
gint curpos;
gint length;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
curpos = gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (layer));
/* is this the bottom layer already? */
length = gimp_container_num_children (gimage->layers);
if (curpos >= length - 1)
{
g_message (_("Layer cannot be lowered more."));
return FALSE;
}
return gimp_image_position_layer (gimage, layer, curpos + 1, TRUE);
}
gboolean
gimp_image_raise_layer_to_top (GimpImage *gimage,
GimpLayer *layer)
{
gint curpos;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
curpos = gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (layer));
if (curpos == 0)
{
g_message (_("Layer is already on top."));
return FALSE;
}
if (! gimp_layer_has_alpha (layer))
{
g_message (_("Cannot raise a layer without alpha."));
return FALSE;
}
return gimp_image_position_layer (gimage, layer, 0, TRUE);
}
gboolean
gimp_image_lower_layer_to_bottom (GimpImage *gimage,
GimpLayer *layer)
{
gint curpos;
gint length;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
curpos = gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (layer));
length = gimp_container_num_children (gimage->layers);
if (curpos >= length - 1)
{
g_message (_("Layer is already on the bottom."));
return FALSE;
}
return gimp_image_position_layer (gimage, layer, length - 1, TRUE);
}
gboolean
gimp_image_position_layer (GimpImage *gimage,
GimpLayer *layer,
gint new_index,
gboolean push_undo)
{
gint off_x, off_y;
gint index;
gint num_layers;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
index = gimp_container_get_child_index (gimage->layers,
GIMP_OBJECT (layer));
if (index < 0)
return FALSE;
num_layers = gimp_container_num_children (gimage->layers);
if (new_index < 0)
new_index = 0;
if (new_index >= num_layers)
new_index = num_layers - 1;
if (new_index == index)
return TRUE;
/* check if we want to move it below a bottom layer without alpha */
if (new_index == num_layers - 1)
{
GimpLayer *tmp;
tmp = (GimpLayer *) gimp_container_get_child_by_index (gimage->layers,
num_layers - 1);
if (new_index == num_layers - 1 &&
! gimp_layer_has_alpha (tmp))
{
g_message (_("Layer \"%s\" has no alpha.\nLayer was placed above it."),
GIMP_OBJECT (tmp)->name);
new_index--;
}
}
if (push_undo)
undo_push_layer_reposition (gimage, layer);
gimp_container_reorder (gimage->layers, GIMP_OBJECT (layer), new_index);
gimp_drawable_offsets (GIMP_DRAWABLE (layer), &off_x, &off_y);
gimp_image_update (gimage,
off_x, off_y,
gimp_drawable_width (GIMP_DRAWABLE (layer)),
gimp_drawable_height (GIMP_DRAWABLE (layer)));
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimage));
return TRUE;
}
gboolean
gimp_image_add_channel (GimpImage *gimage,
GimpChannel *channel,
gint position)
{
ChannelUndo *cu;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
if (GIMP_DRAWABLE (channel)->gimage != NULL &&
GIMP_DRAWABLE (channel)->gimage != gimage)
{
g_warning ("%s: attempting to add channel to wrong image.",
G_GNUC_PRETTY_FUNCTION);
return FALSE;
}
if (gimp_container_have (gimage->channels, GIMP_OBJECT (channel)))
{
g_warning ("%s: trying to add channel to image twice.",
G_GNUC_PRETTY_FUNCTION);
return FALSE;
}
/* Push a channel undo */
cu = g_new (ChannelUndo, 1);
cu->channel = channel;
cu->prev_position = 0;
cu->prev_channel = gimp_image_get_active_channel (gimage);
undo_push_channel (gimage, CHANNEL_ADD_UNDO, cu);
/* add the channel to the list */
gimp_container_add (gimage->channels, GIMP_OBJECT (channel));
g_object_unref (G_OBJECT (channel));
/* notify this gimage of the currently active channel */
gimp_image_set_active_channel (gimage, channel);
/* if channel is visible, update the image */
if (gimp_drawable_get_visible (GIMP_DRAWABLE (channel)))
gimp_drawable_update (GIMP_DRAWABLE (channel),
0, 0,
gimp_drawable_width (GIMP_DRAWABLE (channel)),
gimp_drawable_height (GIMP_DRAWABLE (channel)));
return TRUE;
}
void
gimp_image_remove_channel (GimpImage *gimage,
GimpChannel *channel)
{
ChannelUndo *cu;
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_return_if_fail (GIMP_IS_CHANNEL (channel));
g_return_if_fail (gimp_container_have (gimage->channels,
GIMP_OBJECT (channel)));
/* Prepare a channel undo--push it below */
cu = g_new (ChannelUndo, 1);
cu->channel = channel;
cu->prev_position = gimp_container_get_child_index (gimage->channels,
GIMP_OBJECT (channel));
cu->prev_channel = gimp_image_get_active_channel (gimage);
undo_push_channel (gimage, CHANNEL_REMOVE_UNDO, cu);
g_object_ref (G_OBJECT (channel));
gimp_container_remove (gimage->channels, GIMP_OBJECT (channel));
/* Send out REMOVED signal from channel */
gimp_drawable_removed (GIMP_DRAWABLE (channel));
if (channel == gimp_image_get_active_channel (gimage))
{
if (gimp_container_num_children (gimage->channels) > 0)
{
gimp_image_set_active_channel
(gimage,
GIMP_CHANNEL (gimp_container_get_child_by_index (gimage->channels,
0)));
}
else
{
gimp_image_unset_active_channel (gimage);
}
}
g_object_unref (G_OBJECT (channel));
gimp_image_update (gimage, 0, 0, gimage->width, gimage->height);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimage));
}
gboolean
gimp_image_raise_channel (GimpImage *gimage,
GimpChannel *channel)
{
gint index;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
index = gimp_container_get_child_index (gimage->channels,
GIMP_OBJECT (channel));
if (index == 0)
{
g_message (_("Channel cannot be raised higher."));
return FALSE;
}
return gimp_image_position_channel (gimage, channel, index - 1, TRUE);
}
gboolean
gimp_image_lower_channel (GimpImage *gimage,
GimpChannel *channel)
{
gint index;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
index = gimp_container_get_child_index (gimage->channels,
GIMP_OBJECT (channel));
if (index == gimp_container_num_children (gimage->channels) - 1)
{
g_message (_("Channel cannot be lowered more."));
return FALSE;
}
return gimp_image_position_channel (gimage, channel, index + 1, TRUE);
}
gboolean
gimp_image_position_channel (GimpImage *gimage,
GimpChannel *channel,
gint new_index,
gboolean push_undo /* FIXME unused */)
{
gint index;
gint num_channels;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (GIMP_IS_CHANNEL (channel), FALSE);
index = gimp_container_get_child_index (gimage->channels,
GIMP_OBJECT (channel));
if (index < 0)
return FALSE;
num_channels = gimp_container_num_children (gimage->channels);
new_index = CLAMP (new_index, 0, num_channels - 1);
if (new_index == index)
return TRUE;
gimp_container_reorder (gimage->channels,
GIMP_OBJECT (channel), new_index);
gimp_drawable_update (GIMP_DRAWABLE (channel),
0, 0,
gimp_drawable_width (GIMP_DRAWABLE (channel)),
gimp_drawable_height (GIMP_DRAWABLE (channel)));
return TRUE;
}
gboolean
gimp_image_layer_boundary (const GimpImage *gimage,
BoundSeg **segs,
gint *n_segs)
{
GimpLayer *layer;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
g_return_val_if_fail (segs != NULL, FALSE);
g_return_val_if_fail (n_segs != NULL, FALSE);
/* The second boundary corresponds to the active layer's
* perimeter...
*/
layer = gimp_image_get_active_layer (gimage);
if (layer)
{
*segs = gimp_layer_boundary (layer, n_segs);
return TRUE;
}
else
{
*segs = NULL;
*n_segs = 0;
return FALSE;
}
}
GimpLayer *
gimp_image_pick_correlate_layer (const GimpImage *gimage,
gint x,
gint y)
{
GimpLayer *layer;
GList *list;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
for (list = GIMP_LIST (gimage->layers)->list;
list;
list = g_list_next (list))
{
layer = (GimpLayer *) list->data;
if (gimp_layer_pick_correlate (layer, x, y))
return layer;
}
return NULL;
}
void
gimp_image_invalidate_layer_previews (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimp_container_foreach (gimage->layers,
(GFunc) gimp_viewable_invalidate_preview,
NULL);
}
void
gimp_image_invalidate_channel_previews (GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimp_container_foreach (gimage->channels,
(GFunc) gimp_viewable_invalidate_preview,
NULL);
}
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