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PIKApp/app/tools/pikatransformtool.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "config/pikaguiconfig.h"
#include "core/pika.h"
#include "core/pikadrawable-transform.h"
#include "core/pikaerror.h"
#include "core/pikaimage.h"
#include "core/pikaimage-item-list.h"
#include "core/pikaimage-transform.h"
#include "core/pikaimage-undo.h"
#include "core/pikalayer.h"
#include "core/pikalayermask.h"
#include "core/pikaprogress.h"
#include "core/pika-transform-resize.h"
#include "vectors/pikavectors.h"
#include "display/pikadisplay.h"
#include "display/pikadisplayshell.h"
#include "widgets/pikamessagedialog.h"
#include "widgets/pikamessagebox.h"
#include "widgets/pikawidgets-utils.h"
#include "pikatoolcontrol.h"
#include "pikatools-utils.h"
#include "pikatransformoptions.h"
#include "pikatransformtool.h"
#include "pika-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 pika_transform_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static gchar * pika_transform_tool_real_get_undo_desc (PikaTransformTool *tr_tool);
static PikaTransformDirection pika_transform_tool_real_get_direction (PikaTransformTool *tr_tool);
static GeglBuffer * pika_transform_tool_real_transform (PikaTransformTool *tr_tool,
GList *objects,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
PikaColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y);
static void pika_transform_tool_halt (PikaTransformTool *tr_tool);
static gboolean pika_transform_tool_confirm (PikaTransformTool *tr_tool,
PikaDisplay *display);
G_DEFINE_TYPE (PikaTransformTool, pika_transform_tool, PIKA_TYPE_DRAW_TOOL)
#define parent_class pika_transform_tool_parent_class
/* private functions */
static void
pika_transform_tool_class_init (PikaTransformToolClass *klass)
{
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
tool_class->control = pika_transform_tool_control;
klass->recalc_matrix = NULL;
klass->get_undo_desc = pika_transform_tool_real_get_undo_desc;
klass->get_direction = pika_transform_tool_real_get_direction;
klass->transform = pika_transform_tool_real_transform;
klass->undo_desc = _("Transform");
klass->progress_text = _("Transforming");
}
static void
pika_transform_tool_init (PikaTransformTool *tr_tool)
{
pika_matrix3_identity (&tr_tool->transform);
tr_tool->transform_valid = TRUE;
tr_tool->restore_type = FALSE;
}
static void
pika_transform_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
PikaTransformTool *tr_tool = PIKA_TRANSFORM_TOOL (tool);
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
pika_transform_tool_halt (tr_tool);
break;
case PIKA_TOOL_ACTION_COMMIT:
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static gchar *
pika_transform_tool_real_get_undo_desc (PikaTransformTool *tr_tool)
{
return g_strdup (PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->undo_desc);
}
static PikaTransformDirection
pika_transform_tool_real_get_direction (PikaTransformTool *tr_tool)
{
PikaTransformOptions *options = PIKA_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
return options->direction;
}
static GeglBuffer *
pika_transform_tool_real_transform (PikaTransformTool *tr_tool,
GList *objects,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
PikaColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
PikaTransformToolClass *klass = PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool);
PikaTool *tool = PIKA_TOOL (tr_tool);
PikaTransformOptions *options = PIKA_TRANSFORM_TOOL_GET_OPTIONS (tool);
PikaContext *context = PIKA_CONTEXT (options);
GeglBuffer *ret = NULL;
PikaTransformResize clip = options->clip;
PikaTransformDirection direction;
PikaProgress *progress;
direction = PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_direction (tr_tool);
progress = pika_progress_start (PIKA_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 = pika_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 && PIKA_IS_IMAGE (objects->data))
{
/* this happens for images */
pika_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 = pika_image_item_list_filter (g_list_copy (objects));
pika_image_item_list_transform (pika_item_get_image (objects->data),
items, context,
&tr_tool->transform,
direction,
options->interpolation,
clip,
progress);
g_list_free (items);
}
if (progress)
pika_progress_end (progress);
return ret;
}
static void
pika_transform_tool_halt (PikaTransformTool *tr_tool)
{
PikaTransformOptions *options = PIKA_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
pika_transform_tool_confirm (PikaTransformTool *tr_tool,
PikaDisplay *display)
{
PikaTransformOptions *options = PIKA_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaImage *image = pika_display_get_image (display);
GList *selected_objects;
gdouble max_ratio = 0.0;
PikaObject *max_ratio_object = NULL;
selected_objects = pika_transform_tool_get_selected_objects (tr_tool, display);
if (PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix)
{
PikaMatrix3 transform;
PikaTransformDirection direction;
GeglRectangle selection_bounds;
gboolean selection_empty = TRUE;
GList *objects = NULL;
GList *iter;
transform = tr_tool->transform;
direction = PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_direction (
tr_tool);
if (direction == PIKA_TRANSFORM_BACKWARD)
pika_matrix3_invert (&transform);
if (options->type == PIKA_TRANSFORM_TYPE_LAYER)
{
for (iter = selected_objects; iter; iter = iter->next)
if (! pika_viewable_get_children (PIKA_VIEWABLE (iter->data)))
{
if (pika_item_bounds (PIKA_ITEM (pika_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 &&
PIKA_IS_ITEM (selected_objects->data))
{
objects = pika_image_item_list_filter (g_list_copy (selected_objects));
g_list_free (selected_objects);
}
else
{
objects = selected_objects;
}
if (options->type == PIKA_TRANSFORM_TYPE_IMAGE)
{
objects = g_list_concat (
objects,
pika_image_item_list_get_list (image,
PIKA_ITEM_TYPE_ALL,
PIKA_ITEM_SET_ALL));
}
for (iter = objects; iter; iter = g_list_next (iter))
{
PikaObject *object = iter->data;
PikaTransformResize clip = options->clip;
GeglRectangle orig_bounds;
GeglRectangle new_bounds;
gdouble ratio = 0.0;
if (PIKA_IS_DRAWABLE (object))
{
if (selection_empty)
{
PikaItem *item = PIKA_ITEM (object);
pika_item_get_offset (item, &orig_bounds.x, &orig_bounds.y);
orig_bounds.width = pika_item_get_width (item);
orig_bounds.height = pika_item_get_height (item);
clip = pika_item_get_clip (item, clip);
}
else
{
orig_bounds = selection_bounds;
}
}
else if (PIKA_IS_ITEM (object))
{
PikaItem *item = PIKA_ITEM (object);
pika_item_bounds (item,
&orig_bounds.x, &orig_bounds.y,
&orig_bounds.width, &orig_bounds.height);
clip = pika_item_get_clip (item, clip);
}
else
{
PikaImage *image;
g_return_val_if_fail (PIKA_IS_IMAGE (object), FALSE);
image = PIKA_IMAGE (object);
orig_bounds.x = 0;
orig_bounds.y = 0;
orig_bounds.width = pika_image_get_width (image);
orig_bounds.height = pika_image_get_height (image);
}
pika_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) pika_image_get_width (image));
}
if (new_bounds.height > orig_bounds.height)
{
ratio = MAX (ratio,
(gdouble) new_bounds.height /
(gdouble) pika_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 = pika_message_dialog_new (_("Confirm Transformation"),
PIKA_ICON_DIALOG_WARNING,
GTK_WIDGET (shell),
GTK_DIALOG_MODAL |
GTK_DIALOG_DESTROY_WITH_PARENT,
pika_standard_help_func, NULL,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Transform"), GTK_RESPONSE_OK,
NULL);
pika_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
if (PIKA_IS_ITEM (max_ratio_object))
{
pika_message_box_set_primary_text (PIKA_MESSAGE_DIALOG (dialog)->box,
_("Transformation creates "
"a very large item."));
pika_message_box_set_text (
PIKA_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
{
pika_message_box_set_primary_text (PIKA_MESSAGE_DIALOG (dialog)->box,
_("Transformation creates "
"a very large image."));
pika_message_box_set_text (
PIKA_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
pika_transform_tool_bounds (PikaTransformTool *tr_tool,
PikaDisplay *display)
{
PikaTransformOptions *options;
PikaDisplayShell *shell;
PikaImage *image;
gboolean non_empty = TRUE;
g_return_val_if_fail (PIKA_IS_TRANSFORM_TOOL (tr_tool), FALSE);
options = PIKA_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
image = pika_display_get_image (display);
shell = pika_display_get_shell (display);
g_return_val_if_fail (PIKA_IS_IMAGE (image), FALSE);
switch (options->type)
{
case PIKA_TRANSFORM_TYPE_LAYER:
{
GList *drawables;
gint offset_x;
gint offset_y;
gint x, y;
gint width, height;
drawables = pika_image_get_selected_drawables (image);
pika_item_get_offset (PIKA_ITEM (drawables->data), &offset_x, &offset_y);
non_empty = pika_item_mask_intersect (PIKA_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 PIKA_TRANSFORM_TYPE_SELECTION:
{
pika_item_bounds (PIKA_ITEM (pika_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 PIKA_TRANSFORM_TYPE_PATH:
{
PikaChannel *selection = pika_image_get_mask (image);
/* if selection is not empty, use its bounds to perform the
* transformation of the path
*/
if (! pika_channel_is_empty (selection))
{
pika_item_bounds (PIKA_ITEM (selection),
&tr_tool->x1, &tr_tool->y1,
&tr_tool->x2, &tr_tool->y2);
tr_tool->x2 += tr_tool->x1;
tr_tool->y2 += tr_tool->y1;
}
else
{
GList *iter;
/* without selection, test the emptiness of the path bounds :
* if empty, use the canvas bounds
* else use the path bounds
*/
tr_tool->x1 = G_MAXINT;
tr_tool->y1 = G_MAXINT;
tr_tool->x2 = G_MININT;
tr_tool->y2 = G_MININT;
for (iter = pika_image_get_selected_vectors (image); iter; iter = iter->next)
{
PikaItem *item = iter->data;
gint x;
gint y;
gint width;
gint height;
if (pika_item_bounds (item, &x, &y, &width, &height))
{
tr_tool->x1 = MIN (tr_tool->x1, x);
tr_tool->y1 = MIN (tr_tool->y1, y);
tr_tool->x2 = MAX (tr_tool->x2, x + width);
tr_tool->y2 = MAX (tr_tool->y2, y + height);
}
}
if (tr_tool->x2 <= tr_tool->x1 || tr_tool->y2 <= tr_tool->y1)
{
tr_tool->x1 = 0;
tr_tool->y1 = 0;
tr_tool->x2 = pika_image_get_width (image);
tr_tool->y2 = pika_image_get_height (image);
}
}
}
break;
case PIKA_TRANSFORM_TYPE_IMAGE:
if (! shell->show_all)
{
tr_tool->x1 = 0;
tr_tool->y1 = 0;
tr_tool->x2 = pika_image_get_width (image);
tr_tool->y2 = pika_image_get_height (image);
}
else
{
GeglRectangle bounding_box;
bounding_box = pika_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
pika_transform_tool_recalc_matrix (PikaTransformTool *tr_tool,
PikaDisplay *display)
{
g_return_if_fail (PIKA_IS_TRANSFORM_TOOL (tr_tool));
g_return_if_fail (PIKA_IS_DISPLAY (display));
if (tr_tool->x1 == tr_tool->x2 && tr_tool->y1 == tr_tool->y2)
pika_transform_tool_bounds (tr_tool, display);
if (PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix)
PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix (tr_tool);
}
GList *
pika_transform_tool_get_selected_objects (PikaTransformTool *tr_tool,
PikaDisplay *display)
{
PikaTransformOptions *options;
PikaImage *image;
GList *objects = NULL;
g_return_val_if_fail (PIKA_IS_TRANSFORM_TOOL (tr_tool), NULL);
g_return_val_if_fail (PIKA_IS_DISPLAY (display), NULL);
options = PIKA_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
image = pika_display_get_image (display);
g_return_val_if_fail (PIKA_IS_IMAGE (image), NULL);
if (tr_tool->objects)
return g_list_copy (tr_tool->objects);
switch (options->type)
{
case PIKA_TRANSFORM_TYPE_LAYER:
objects = pika_image_get_selected_drawables (image);
break;
case PIKA_TRANSFORM_TYPE_SELECTION:
if (! pika_channel_is_empty (pika_image_get_mask (image)))
objects = g_list_prepend (NULL, pika_image_get_mask (image));
break;
case PIKA_TRANSFORM_TYPE_PATH:
objects = g_list_copy (pika_image_get_selected_vectors (image));
break;
case PIKA_TRANSFORM_TYPE_IMAGE:
objects = g_list_prepend (NULL, image);
break;
}
return objects;
}
GList *
pika_transform_tool_check_selected_objects (PikaTransformTool *tr_tool,
PikaDisplay *display,
GError **error)
{
PikaTransformOptions *options;
GList *objects;
GList *iter;
const gchar *null_message = NULL;
const gchar *locked_message = NULL;
PikaItem *locked_item = NULL;
PikaGuiConfig *config = PIKA_GUI_CONFIG (display->pika->config);
g_return_val_if_fail (PIKA_IS_TRANSFORM_TOOL (tr_tool), NULL);
g_return_val_if_fail (PIKA_IS_DISPLAY (display), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
options = PIKA_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
objects = pika_transform_tool_get_selected_objects (tr_tool, display);
switch (options->type)
{
case PIKA_TRANSFORM_TYPE_LAYER:
null_message = _("There is no layer to transform.");
for (iter = objects; iter; iter = iter->next)
{
PikaItem *item = iter->data;
if (pika_item_is_content_locked (item, &locked_item))
locked_message = _("A selected layer's pixels are locked.");
else if (pika_item_is_position_locked (item, &locked_item))
locked_message = _("A selected layer's position and size are locked.");
if (! pika_item_is_visible (item) &&
! config->edit_non_visible &&
! g_list_find (tr_tool->objects, item)) /* see bug #759194 */
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("A selected layer is not visible."));
return NULL;
}
if (! pika_transform_tool_bounds (tr_tool, display))
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("The selection does not intersect with a selected layer."));
return NULL;
}
}
break;
case PIKA_TRANSFORM_TYPE_SELECTION:
null_message = _("There is no selection to transform.");
for (iter = objects; iter; iter = iter->next)
{
PikaItem *item = iter->data;
/* cannot happen, so don't translate these messages */
if (pika_item_is_content_locked (item, &locked_item))
locked_message = "The selection's pixels are locked.";
else if (pika_item_is_position_locked (item, &locked_item))
locked_message = "The selection's position and size are locked.";
}
break;
case PIKA_TRANSFORM_TYPE_PATH:
null_message = _("There is no path to transform.");
for (iter = objects; iter; iter = iter->next)
{
PikaItem *item = iter->data;
if (pika_item_is_content_locked (item, &locked_item))
locked_message = _("The selected path's strokes are locked.");
else if (pika_item_is_position_locked (item, &locked_item))
locked_message = _("The selected path's position is locked.");
else if (! pika_vectors_get_n_strokes (PIKA_VECTORS (item)))
locked_message = _("The selected path has no strokes.");
}
break;
case PIKA_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, PIKA_ERROR, PIKA_FAILED, null_message);
if (error)
{
pika_tools_show_tool_options (display->pika);
pika_widget_blink (options->type_box);
}
return NULL;
}
if (locked_message)
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED, locked_message);
if (error)
{
if (locked_item == NULL)
locked_item = PIKA_ITEM (objects->data);
pika_tools_blink_lock_box (display->pika, locked_item);
}
return NULL;
}
return objects;
}
gboolean
pika_transform_tool_transform (PikaTransformTool *tr_tool,
PikaDisplay *display)
{
PikaTool *tool;
PikaTransformOptions *options;
PikaImage *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;
PikaColorProfile *buffer_profile;
gchar *undo_desc = NULL;
gboolean new_layer = FALSE;
GError *error = NULL;
g_return_val_if_fail (PIKA_IS_TRANSFORM_TOOL (tr_tool), FALSE);
g_return_val_if_fail (PIKA_IS_DISPLAY (display), FALSE);
tool = PIKA_TOOL (tr_tool);
options = PIKA_TRANSFORM_TOOL_GET_OPTIONS (tool);
image = pika_display_get_image (display);
g_return_val_if_fail (PIKA_IS_IMAGE (image), FALSE);
selected_objects = pika_transform_tool_check_selected_objects (tr_tool, display,
&error);
if (! selected_objects)
{
pika_tool_message_literal (tool, display, error->message);
g_clear_error (&error);
return FALSE;
}
pika_transform_tool_recalc_matrix (tr_tool, display);
if (! tr_tool->transform_valid)
{
pika_tool_message_literal (tool, display,
_("The current transform is invalid"));
return FALSE;
}
if (PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->recalc_matrix &&
pika_matrix3_is_identity (&tr_tool->transform))
{
/* No need to commit an identity transformation! */
return TRUE;
}
if (! pika_transform_tool_confirm (tr_tool, display))
return FALSE;
pika_set_busy (display->pika);
/* We're going to dirty this image, but we want to keep the tool around */
pika_tool_control_push_preserve (tool->control, TRUE);
undo_desc = PIKA_TRANSFORM_TOOL_GET_CLASS (tr_tool)->get_undo_desc (tr_tool);
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_TRANSFORM, undo_desc);
g_free (undo_desc);
switch (options->type)
{
case PIKA_TRANSFORM_TYPE_LAYER:
if (! pika_channel_is_empty (pika_image_get_mask (image)))
{
orig_buffer = pika_drawable_transform_cut (
selected_objects,
PIKA_CONTEXT (options),
&orig_offset_x,
&orig_offset_y,
&new_layer);
}
break;
case PIKA_TRANSFORM_TYPE_SELECTION:
case PIKA_TRANSFORM_TYPE_PATH:
case PIKA_TRANSFORM_TYPE_IMAGE:
break;
}
/* Send the request for the transformation to the tool...
*/
new_buffer = PIKA_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 PIKA_TRANSFORM_TYPE_LAYER:
if (new_buffer)
{
/* paste the new transformed image to the image...also implement
* undo...
*/
pika_drawable_transform_paste (PIKA_DRAWABLE (selected_objects->data),
new_buffer, buffer_profile,
new_offset_x, new_offset_y,
new_layer);
g_object_unref (new_buffer);
}
break;
case PIKA_TRANSFORM_TYPE_SELECTION:
case PIKA_TRANSFORM_TYPE_PATH:
case PIKA_TRANSFORM_TYPE_IMAGE:
/* Nothing to be done */
break;
}
pika_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
*/
pika_tool_control_pop_preserve (tool->control);
pika_unset_busy (display->pika);
pika_image_flush (image);
g_list_free (selected_objects);
return TRUE;
}
void
pika_transform_tool_set_type (PikaTransformTool *tr_tool,
PikaTransformType type)
{
PikaTransformOptions *options;
g_return_if_fail (PIKA_IS_TRANSFORM_TOOL (tr_tool));
options = PIKA_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;
}