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2ea5dec56ec0ec00cd1351bd78eaf0b2aaeb2cb2
gimp/app/tools/gimptransformtool.c
Jehan 647ebffe7b app: GimpTransformTool multi-layer aware. 
This implied a lot of other core changes, which also pushed me into
improving some of the edit actions and PDB calls to be multi-layer aware
in the same time.

Note that it is still work-in-progress, but I just had to commit
something in an acceptable intermediate state otherwise I was just going
crazy.

In particular now the various transform tools are multi-layer aware and
work simultaneously on all selected layers (and the linked layers if any
of the selected layers is linked too). Both preview and final transform
processing works.
In the limitations, preview doesn't work well (only one layer in the
preview) when there is a selection (though the actual transform works).

Also I am left to wonder how we should process this case of canvas
selection+transform on multi-layers. Indeed currently I am just creating
a floating selection (like we used to for the selection+transform case)
containing a transform result of the composited version of all selected
layers. This is a possible expected result, but another could be to get
several transformed layers (without composition). But then should the
"Floating Selection" concept allow for multiple Floating Selections?
Sooo many questions left to answer.
2020-05-28 14:28:01 +02:00

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpguiconfig.h"
#include "core/gimp.h"
#include "core/gimpdrawable-transform.h"
#include "core/gimperror.h"
#include "core/gimpimage.h"
#include "core/gimpimage-item-list.h"
#include "core/gimpimage-transform.h"
#include "core/gimpimage-undo.h"
#include "core/gimpitem-linked.h"
#include "core/gimplayer.h"
#include "core/gimplayermask.h"
#include "core/gimpprogress.h"
#include "core/gimp-transform-resize.h"
#include "vectors/gimpvectors.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "widgets/gimpmessagedialog.h"
#include "widgets/gimpmessagebox.h"
#include "widgets/gimpwidgets-utils.h"
#include "gimptoolcontrol.h"
#include "gimptools-utils.h"
#include "gimptransformoptions.h"
#include "gimptransformtool.h"
#include "gimp-intl.h"
/* the minimal ratio between the transformed item size and the image size,
* above which confirmation is required.
*/
#define MIN_CONFIRMATION_RATIO 10
/* local function prototypes */
static void gimp_transform_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static gchar * gimp_transform_tool_real_get_undo_desc (GimpTransformTool *tr_tool);
static GimpTransformDirection gimp_transform_tool_real_get_direction (GimpTransformTool *tr_tool);
static GeglBuffer * gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
GList *objects,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y);
static void gimp_transform_tool_halt (GimpTransformTool *tr_tool);
static gboolean gimp_transform_tool_confirm (GimpTransformTool *tr_tool,
GimpDisplay *display);
G_DEFINE_TYPE (GimpTransformTool, gimp_transform_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_transform_tool_parent_class
/* private functions */
static void
gimp_transform_tool_class_init (GimpTransformToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
tool_class->control = gimp_transform_tool_control;
klass->recalc_matrix = NULL;
klass->get_undo_desc = gimp_transform_tool_real_get_undo_desc;
klass->get_direction = gimp_transform_tool_real_get_direction;
klass->transform = gimp_transform_tool_real_transform;
klass->undo_desc = _("Transform");
klass->progress_text = _("Transforming");
}
static void
gimp_transform_tool_init (GimpTransformTool *tr_tool)
{
gimp_matrix3_identity (&tr_tool->transform);
tr_tool->transform_valid = TRUE;
tr_tool->restore_type = FALSE;
}
static void
gimp_transform_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
case GIMP_TOOL_ACTION_RESUME:
break;
case GIMP_TOOL_ACTION_HALT:
gimp_transform_tool_halt (tr_tool);
break;
case GIMP_TOOL_ACTION_COMMIT:
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static gchar *
gimp_transform_tool_real_get_undo_desc (GimpTransformTool *tr_tool)
{
return g_strdup (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->undo_desc);
}
static GimpTransformDirection
gimp_transform_tool_real_get_direction (GimpTransformTool *tr_tool)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
return options->direction;
}
static GeglBuffer *
gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
GList *objects,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
GimpTransformToolClass *klass = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool);
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
GimpContext *context = GIMP_CONTEXT (options);
GeglBuffer *ret = NULL;
GimpTransformResize clip = options->clip;
GimpTransformDirection direction;
GimpProgress *progress;
direction = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_direction (tr_tool);
progress = gimp_progress_start (GIMP_PROGRESS (tool), FALSE,
"%s", klass->progress_text);
while (g_main_context_pending (NULL))
g_main_context_iteration (NULL, FALSE);
if (orig_buffer)
{
/* this happens when transforming a selection cut out of
* normal drawables.
*/
ret = gimp_drawable_transform_buffer_affine (objects->data,
context,
orig_buffer,
orig_offset_x,
orig_offset_y,
&tr_tool->transform,
direction,
options->interpolation,
clip,
buffer_profile,
new_offset_x,
new_offset_y,
progress);
}
else if (g_list_length (objects) == 1 && GIMP_IS_IMAGE (objects->data))
{
/* this happens for images */
gimp_image_transform (objects->data, context,
&tr_tool->transform,
direction,
options->interpolation,
clip,
progress);
}
else
{
GList *items;
/* this happens for entire drawables, paths and layer groups */
g_return_val_if_fail (g_list_length (objects) > 0, NULL);
items = gimp_image_item_list_linked (gimp_item_get_image (objects->data), objects);
gimp_image_item_list_transform (gimp_item_get_image (objects->data),
items, context,
&tr_tool->transform,
direction,
options->interpolation,
clip,
progress);
g_list_free (items);
}
if (progress)
gimp_progress_end (progress);
return ret;
}
static void
gimp_transform_tool_halt (GimpTransformTool *tr_tool)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
tr_tool->x1 = 0;
tr_tool->y1 = 0;
tr_tool->x2 = 0;
tr_tool->y2 = 0;
if (tr_tool->restore_type)
{
g_object_set (options,
"type", tr_tool->saved_type,
NULL);
tr_tool->restore_type = FALSE;
}
}
static gboolean
gimp_transform_tool_confirm (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GList *selected_objects;
gdouble max_ratio = 0.0;
GimpObject *max_ratio_object = NULL;
selected_objects = gimp_transform_tool_get_selected_objects (tr_tool, display);
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix)
{
GimpMatrix3 transform;
GimpTransformDirection direction;
GeglRectangle selection_bounds;
gboolean selection_empty = TRUE;
GList *objects = NULL;
GList *iter;
transform = tr_tool->transform;
direction = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_direction (
tr_tool);
if (direction == GIMP_TRANSFORM_BACKWARD)
gimp_matrix3_invert (&transform);
if (options->type == GIMP_TRANSFORM_TYPE_LAYER)
{
for (iter = selected_objects; iter; iter = iter->next)
if (! gimp_viewable_get_children (GIMP_VIEWABLE (iter->data)))
{
if (gimp_item_bounds (GIMP_ITEM (gimp_image_get_mask (image)),
&selection_bounds.x, &selection_bounds.y,
&selection_bounds.width, &selection_bounds.height))
{
selection_empty = FALSE;
break;
}
}
}
if (selection_empty &&
selected_objects &&
GIMP_IS_ITEM (selected_objects->data))
{
objects = gimp_image_item_list_linked (image, selected_objects);
g_list_free (selected_objects);
}
else
{
objects = selected_objects;
}
if (options->type == GIMP_TRANSFORM_TYPE_IMAGE)
{
objects = g_list_concat (
objects,
gimp_image_item_list_get_list (image,
GIMP_ITEM_TYPE_ALL,
GIMP_ITEM_SET_ALL));
}
for (iter = objects; iter; iter = g_list_next (iter))
{
GimpObject *object = iter->data;
GimpTransformResize clip = options->clip;
GeglRectangle orig_bounds;
GeglRectangle new_bounds;
gdouble ratio = 0.0;
if (GIMP_IS_DRAWABLE (object))
{
if (selection_empty)
{
GimpItem *item = GIMP_ITEM (object);
gimp_item_get_offset (item, &orig_bounds.x, &orig_bounds.y);
orig_bounds.width = gimp_item_get_width (item);
orig_bounds.height = gimp_item_get_height (item);
clip = gimp_item_get_clip (item, clip);
}
else
{
orig_bounds = selection_bounds;
}
}
else if (GIMP_IS_ITEM (object))
{
GimpItem *item = GIMP_ITEM (object);
gimp_item_bounds (item,
&orig_bounds.x, &orig_bounds.y,
&orig_bounds.width, &orig_bounds.height);
clip = gimp_item_get_clip (item, clip);
}
else
{
GimpImage *image;
g_return_val_if_fail (GIMP_IS_IMAGE (object), FALSE);
image = GIMP_IMAGE (object);
orig_bounds.x = 0;
orig_bounds.y = 0;
orig_bounds.width = gimp_image_get_width (image);
orig_bounds.height = gimp_image_get_height (image);
}
gimp_transform_resize_boundary (&transform, clip,
orig_bounds.x,
orig_bounds.y,
orig_bounds.x + orig_bounds.width,
orig_bounds.y + orig_bounds.height,
&new_bounds.x,
&new_bounds.y,
&new_bounds.width,
&new_bounds.height);
new_bounds.width -= new_bounds.x;
new_bounds.height -= new_bounds.y;
if (new_bounds.width > orig_bounds.width)
{
ratio = MAX (ratio,
(gdouble) new_bounds.width /
(gdouble) gimp_image_get_width (image));
}
if (new_bounds.height > orig_bounds.height)
{
ratio = MAX (ratio,
(gdouble) new_bounds.height /
(gdouble) gimp_image_get_height (image));
}
if (ratio > max_ratio)
{
max_ratio = ratio;
max_ratio_object = object;
}
}
g_list_free (objects);
}
if (max_ratio > MIN_CONFIRMATION_RATIO)
{
GtkWidget *dialog;
gint response;
dialog = gimp_message_dialog_new (_("Confirm Transformation"),
GIMP_ICON_DIALOG_WARNING,
GTK_WIDGET (shell),
GTK_DIALOG_MODAL |
GTK_DIALOG_DESTROY_WITH_PARENT,
gimp_standard_help_func, NULL,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Transform"), GTK_RESPONSE_OK,
NULL);
gimp_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
if (GIMP_IS_ITEM (max_ratio_object))
{
gimp_message_box_set_primary_text (GIMP_MESSAGE_DIALOG (dialog)->box,
_("Transformation creates "
"a very large item."));
gimp_message_box_set_text (
GIMP_MESSAGE_DIALOG (dialog)->box,
_("Applying the transformation will result "
"in an item that is over %g times larger "
"than the image."),
floor (max_ratio));
}
else
{
gimp_message_box_set_primary_text (GIMP_MESSAGE_DIALOG (dialog)->box,
_("Transformation creates "
"a very large image."));
gimp_message_box_set_text (
GIMP_MESSAGE_DIALOG (dialog)->box,
_("Applying the transformation will enlarge "
"the image by a factor of %g."),
floor (max_ratio));
}
response = gtk_dialog_run (GTK_DIALOG (dialog));
gtk_widget_destroy (dialog);
if (response != GTK_RESPONSE_OK)
return FALSE;
}
return TRUE;
}
/* public functions */
gboolean
gimp_transform_tool_bounds (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options;
GimpDisplayShell *shell;
GimpImage *image;
gboolean non_empty = TRUE;
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), FALSE);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
image = gimp_display_get_image (display);
shell = gimp_display_get_shell (display);
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
{
GList *drawables;
gint offset_x;
gint offset_y;
gint x, y;
gint width, height;
drawables = gimp_image_get_selected_drawables (image);
gimp_item_get_offset (GIMP_ITEM (drawables->data), &offset_x, &offset_y);
non_empty = gimp_item_mask_intersect (GIMP_ITEM (drawables->data),
&x, &y, &width, &height);
tr_tool->x1 = x + offset_x;
tr_tool->y1 = y + offset_y;
tr_tool->x2 = x + width + offset_x;
tr_tool->y2 = y + height + offset_y;
g_list_free (drawables);
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
{
gimp_item_bounds (GIMP_ITEM (gimp_image_get_mask (image)),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2);
tr_tool->x2 += tr_tool->x1;
tr_tool->y2 += tr_tool->y1;
}
break;
case GIMP_TRANSFORM_TYPE_PATH:
{
GimpChannel *selection = gimp_image_get_mask (image);
/* if selection is not empty, use its bounds to perform the
* transformation of the path
*/
if (! gimp_channel_is_empty (selection))
{
gimp_item_bounds (GIMP_ITEM (selection),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2);
}
else
{
/* without selection, test the emptiness of the path bounds :
* if empty, use the canvas bounds
* else use the path bounds
*/
if (! gimp_item_bounds (GIMP_ITEM (gimp_image_get_active_vectors (image)),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2))
{
tr_tool->x1 = 0;
tr_tool->y1 = 0;
tr_tool->x2 = gimp_image_get_width (image);
tr_tool->y2 = gimp_image_get_height (image);
}
}
tr_tool->x2 += tr_tool->x1;
tr_tool->y2 += tr_tool->y1;
}
break;
case GIMP_TRANSFORM_TYPE_IMAGE:
if (! shell->show_all)
{
tr_tool->x1 = 0;
tr_tool->y1 = 0;
tr_tool->x2 = gimp_image_get_width (image);
tr_tool->y2 = gimp_image_get_height (image);
}
else
{
GeglRectangle bounding_box;
bounding_box = gimp_display_shell_get_bounding_box (shell);
tr_tool->x1 = bounding_box.x;
tr_tool->y1 = bounding_box.y;
tr_tool->x2 = bounding_box.x + bounding_box.width;
tr_tool->y2 = bounding_box.y + bounding_box.height;
}
break;
}
return non_empty;
}
void
gimp_transform_tool_recalc_matrix (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
g_return_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool));
g_return_if_fail (GIMP_IS_DISPLAY (display));
if (tr_tool->x1 == tr_tool->x2 && tr_tool->y1 == tr_tool->y2)
gimp_transform_tool_bounds (tr_tool, display);
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix)
GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix (tr_tool);
}
GList *
gimp_transform_tool_get_selected_objects (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTransformOptions *options;
GimpImage *image;
GList *objects = NULL;
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), NULL);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
image = gimp_display_get_image (display);
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
if (tr_tool->objects)
return g_list_copy (tr_tool->objects);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
objects = gimp_image_get_selected_drawables (image);
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
if (! gimp_channel_is_empty (gimp_image_get_mask (image)))
objects = g_list_prepend (NULL, gimp_image_get_mask (image));
break;
case GIMP_TRANSFORM_TYPE_PATH:
objects = g_list_copy (gimp_image_get_selected_vectors (image));
break;
case GIMP_TRANSFORM_TYPE_IMAGE:
objects = g_list_prepend (NULL, image);
break;
}
return objects;
}
GList *
gimp_transform_tool_check_selected_objects (GimpTransformTool *tr_tool,
GimpDisplay *display,
GError **error)
{
GimpTransformOptions *options;
GList *objects;
GList *iter;
const gchar *null_message = NULL;
const gchar *locked_message = NULL;
GimpGuiConfig *config = GIMP_GUI_CONFIG (display->gimp->config);
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), NULL);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
objects = gimp_transform_tool_get_selected_objects (tr_tool, display);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
null_message = _("There is no layer to transform.");
for (iter = objects; iter; iter = iter->next)
{
GimpItem *item = iter->data;
if (gimp_item_is_content_locked (item))
locked_message = _("A selected layer's pixels are locked.");
else if (gimp_item_is_position_locked (item))
locked_message = _("A selected layer's position and size are locked.");
if (! gimp_item_is_visible (item) &&
! config->edit_non_visible &&
! g_list_find (tr_tool->objects, item)) /* see bug #759194 */
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("A selected layer is not visible."));
return NULL;
}
if (! gimp_transform_tool_bounds (tr_tool, display))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("The selection does not intersect with a selected layer."));
return NULL;
}
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
null_message = _("There is no selection to transform.");
for (iter = objects; iter; iter = iter->next)
{
GimpItem *item = iter->data;
/* cannot happen, so don't translate these messages */
if (gimp_item_is_content_locked (item))
locked_message = "The selection's pixels are locked.";
else if (gimp_item_is_position_locked (item))
locked_message = "The selection's position and size are locked.";
}
break;
case GIMP_TRANSFORM_TYPE_PATH:
null_message = _("There is no path to transform.");
for (iter = objects; iter; iter = iter->next)
{
GimpItem *item = iter->data;
if (gimp_item_is_content_locked (item))
locked_message = _("The active path's strokes are locked.");
else if (gimp_item_is_position_locked (item))
locked_message = _("The active path's position is locked.");
else if (! gimp_vectors_get_n_strokes (GIMP_VECTORS (item)))
locked_message = _("The active path has no strokes.");
}
break;
case GIMP_TRANSFORM_TYPE_IMAGE:
/* cannot happen, so don't translate this message */
null_message = "There is no image to transform.";
break;
}
if (! objects)
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, null_message);
if (error)
gimp_widget_blink (options->type_box);
return NULL;
}
if (locked_message)
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, locked_message);
if (error)
gimp_tools_blink_lock_box (display->gimp, GIMP_ITEM (objects->data));
return NULL;
}
return objects;
}
gboolean
gimp_transform_tool_transform (GimpTransformTool *tr_tool,
GimpDisplay *display)
{
GimpTool *tool;
GimpTransformOptions *options;
GimpImage *image;
GList *selected_objects;
GeglBuffer *orig_buffer = NULL;
gint orig_offset_x = 0;
gint orig_offset_y = 0;
GeglBuffer *new_buffer;
gint new_offset_x;
gint new_offset_y;
GimpColorProfile *buffer_profile;
gchar *undo_desc = NULL;
gboolean new_layer = FALSE;
GError *error = NULL;
g_return_val_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
tool = GIMP_TOOL (tr_tool);
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
image = gimp_display_get_image (display);
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
selected_objects = gimp_transform_tool_check_selected_objects (tr_tool, display,
&error);
if (! selected_objects)
{
gimp_tool_message_literal (tool, display, error->message);
g_clear_error (&error);
return FALSE;
}
gimp_transform_tool_recalc_matrix (tr_tool, display);
if (! tr_tool->transform_valid)
{
gimp_tool_message_literal (tool, display,
_("The current transform is invalid"));
return FALSE;
}
if (GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix &&
gimp_matrix3_is_identity (&tr_tool->transform))
{
/* No need to commit an identity transformation! */
return TRUE;
}
if (! gimp_transform_tool_confirm (tr_tool, display))
return FALSE;
gimp_set_busy (display->gimp);
/* We're going to dirty this image, but we want to keep the tool around */
gimp_tool_control_push_preserve (tool->control, TRUE);
undo_desc = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_undo_desc (tr_tool);
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_TRANSFORM, undo_desc);
g_free (undo_desc);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
if (! gimp_channel_is_empty (gimp_image_get_mask (image)))
{
orig_buffer = gimp_drawable_transform_cut (
selected_objects,
GIMP_CONTEXT (options),
&orig_offset_x,
&orig_offset_y,
&new_layer);
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
case GIMP_TRANSFORM_TYPE_PATH:
case GIMP_TRANSFORM_TYPE_IMAGE:
break;
}
/* Send the request for the transformation to the tool...
*/
new_buffer = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool)->transform (
tr_tool,
selected_objects,
orig_buffer,
orig_offset_x,
orig_offset_y,
&buffer_profile,
&new_offset_x,
&new_offset_y);
if (orig_buffer)
g_object_unref (orig_buffer);
switch (options->type)
{
case GIMP_TRANSFORM_TYPE_LAYER:
if (new_buffer)
{
/* paste the new transformed image to the image...also implement
* undo...
*/
gimp_drawable_transform_paste (GIMP_DRAWABLE (selected_objects->data),
new_buffer, buffer_profile,
new_offset_x, new_offset_y,
new_layer);
g_object_unref (new_buffer);
}
break;
case GIMP_TRANSFORM_TYPE_SELECTION:
case GIMP_TRANSFORM_TYPE_PATH:
case GIMP_TRANSFORM_TYPE_IMAGE:
/* Nothing to be done */
break;
}
gimp_image_undo_group_end (image);
/* We're done dirtying the image, and would like to be restarted if
* the image gets dirty while the tool exists
*/
gimp_tool_control_pop_preserve (tool->control);
gimp_unset_busy (display->gimp);
gimp_image_flush (image);
g_list_free (selected_objects);
return TRUE;
}
void
gimp_transform_tool_set_type (GimpTransformTool *tr_tool,
GimpTransformType type)
{
GimpTransformOptions *options;
g_return_if_fail (GIMP_IS_TRANSFORM_TOOL (tr_tool));
options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
if (! tr_tool->restore_type)
tr_tool->saved_type = options->type;
tr_tool->restore_type = FALSE;
g_object_set (options,
"type", type,
NULL);
tr_tool->restore_type = TRUE;
}
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