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gimp/app/tools/gimptransformgridtool.c

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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 <gdk/gdkkeysyms.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimp.h"
#include "core/gimpboundary.h"
#include "core/gimperror.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo.h"
#include "core/gimpimage-undo-push.h"
#include "core/gimplayer.h"
#include "core/gimplayermask.h"
#include "core/gimpprojection.h"
#include "core/gimptoolinfo.h"
#include "vectors/gimpvectors.h"
#include "vectors/gimpstroke.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpcanvasitem.h"
#include "display/gimpdisplay.h"
#include "display/gimptoolgui.h"
#include "display/gimptoolwidget.h"
#include "gimptoolcontrol.h"
#include "gimptransformgridoptions.h"
#include "gimptransformgridtool.h"
#include "gimptransformgridtoolundo.h"
#include "gimptransformoptions.h"
#include "gimp-intl.h"
#define RESPONSE_RESET 1
typedef struct
{
GimpTransformDirection direction;
TransInfo trans_infos[2];
} UndoInfo;
static void gimp_transform_grid_tool_finalize (GObject *object);
static gboolean gimp_transform_grid_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static void gimp_transform_grid_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static void gimp_transform_grid_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_transform_grid_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_transform_grid_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static void gimp_transform_grid_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display);
static void gimp_transform_grid_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static const gchar * gimp_transform_grid_tool_can_undo (GimpTool *tool,
GimpDisplay *display);
static const gchar * gimp_transform_grid_tool_can_redo (GimpTool *tool,
GimpDisplay *display);
static gboolean gimp_transform_grid_tool_undo (GimpTool *tool,
GimpDisplay *display);
static gboolean gimp_transform_grid_tool_redo (GimpTool *tool,
GimpDisplay *display);
static void gimp_transform_grid_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec);
static void gimp_transform_grid_tool_draw (GimpDrawTool *draw_tool);
static void gimp_transform_grid_tool_recalc_matrix (GimpTransformTool *tr_tool);
static gchar * gimp_transform_grid_tool_get_undo_desc (GimpTransformTool *tr_tool);
static GimpTransformDirection gimp_transform_grid_tool_get_direction
(GimpTransformTool *tr_tool);
static GeglBuffer * gimp_transform_grid_tool_transform (GimpTransformTool *tr_tool,
GimpItem *item,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y);
static gchar * gimp_transform_grid_tool_real_get_undo_desc (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_real_update_widget (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_real_widget_changed (GimpTransformGridTool *tg_tool);
static GeglBuffer * gimp_transform_grid_tool_real_transform (GimpTransformGridTool *tg_tool,
GimpItem *item,
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_grid_tool_widget_changed (GimpToolWidget *widget,
GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_widget_response (GimpToolWidget *widget,
gint response_id,
GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_halt (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_commit (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_dialog (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_dialog_update (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_prepare (GimpTransformGridTool *tg_tool,
GimpDisplay *display);
static GimpToolWidget * gimp_transform_grid_tool_get_widget (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_update_widget (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_response (GimpToolGui *gui,
gint response_id,
GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_update_sensitivity (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_update_preview (GimpTransformGridTool *tg_tool);
static void gimp_transform_grid_tool_hide_active_item (GimpTransformGridTool *tg_tool,
GimpItem *item);
static void gimp_transform_grid_tool_show_active_item (GimpTransformGridTool *tg_tool);
static UndoInfo * undo_info_new (void);
static void undo_info_free (UndoInfo *info);
G_DEFINE_TYPE (GimpTransformGridTool, gimp_transform_grid_tool, GIMP_TYPE_TRANSFORM_TOOL)
#define parent_class gimp_transform_grid_tool_parent_class
static void
gimp_transform_grid_tool_class_init (GimpTransformGridToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_class = GIMP_DRAW_TOOL_CLASS (klass);
GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
object_class->finalize = gimp_transform_grid_tool_finalize;
tool_class->initialize = gimp_transform_grid_tool_initialize;
tool_class->control = gimp_transform_grid_tool_control;
tool_class->button_press = gimp_transform_grid_tool_button_press;
tool_class->button_release = gimp_transform_grid_tool_button_release;
tool_class->motion = gimp_transform_grid_tool_motion;
tool_class->modifier_key = gimp_transform_grid_tool_modifier_key;
tool_class->cursor_update = gimp_transform_grid_tool_cursor_update;
tool_class->can_undo = gimp_transform_grid_tool_can_undo;
tool_class->can_redo = gimp_transform_grid_tool_can_redo;
tool_class->undo = gimp_transform_grid_tool_undo;
tool_class->redo = gimp_transform_grid_tool_redo;
tool_class->options_notify = gimp_transform_grid_tool_options_notify;
draw_class->draw = gimp_transform_grid_tool_draw;
tr_class->recalc_matrix = gimp_transform_grid_tool_recalc_matrix;
tr_class->get_undo_desc = gimp_transform_grid_tool_get_undo_desc;
tr_class->get_direction = gimp_transform_grid_tool_get_direction;
tr_class->transform = gimp_transform_grid_tool_transform;
klass->info_to_matrix = NULL;
klass->matrix_to_info = NULL;
klass->get_undo_desc = gimp_transform_grid_tool_real_get_undo_desc;
klass->dialog = NULL;
klass->dialog_update = NULL;
klass->prepare = NULL;
klass->get_widget = NULL;
klass->update_widget = gimp_transform_grid_tool_real_update_widget;
klass->widget_changed = gimp_transform_grid_tool_real_widget_changed;
klass->transform = gimp_transform_grid_tool_real_transform;
klass->ok_button_label = _("_Transform");
}
static void
gimp_transform_grid_tool_init (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
gimp_tool_control_set_scroll_lock (tool->control, TRUE);
gimp_tool_control_set_preserve (tool->control, FALSE);
gimp_tool_control_set_dirty_mask (tool->control,
GIMP_DIRTY_IMAGE_SIZE |
GIMP_DIRTY_DRAWABLE |
GIMP_DIRTY_SELECTION |
GIMP_DIRTY_ACTIVE_DRAWABLE);
gimp_tool_control_set_active_modifiers (tool->control,
GIMP_TOOL_ACTIVE_MODIFIERS_SAME);
gimp_tool_control_set_precision (tool->control,
GIMP_CURSOR_PRECISION_SUBPIXEL);
gimp_tool_control_set_cursor (tool->control,
GIMP_CURSOR_CROSSHAIR_SMALL);
gimp_tool_control_set_action_opacity (tool->control,
"tools/tools-transform-preview-opacity-set");
tg_tool->strokes = g_ptr_array_new ();
}
static void
gimp_transform_grid_tool_finalize (GObject *object)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (object);
g_clear_object (&tg_tool->gui);
g_clear_pointer (&tg_tool->strokes, g_ptr_array_unref);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_transform_grid_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
GimpItem *item;
UndoInfo *undo_info;
item = gimp_transform_tool_check_active_item (tr_tool, display, error);
if (! item)
return FALSE;
tool->display = display;
tool->drawable = drawable;
tr_tool->item = item;
/* Initialize the transform_grid tool dialog */
if (! tg_tool->gui)
gimp_transform_grid_tool_dialog (tg_tool);
/* Find the transform bounds for some tools (like scale,
* perspective) that actually need the bounds for initializing
*/
gimp_transform_tool_bounds (tr_tool, display);
/* Initialize the tool-specific trans_info, and adjust the tool dialog */
gimp_transform_grid_tool_prepare (tg_tool, display);
/* Recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool, display);
/* Get the on-canvas gui */
tg_tool->widget = gimp_transform_grid_tool_get_widget (tg_tool);
gimp_transform_grid_tool_hide_active_item (tg_tool, item);
/* start drawing the bounding box and handles... */
gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
/* Initialize undo and redo lists */
undo_info = undo_info_new ();
tg_tool->undo_list = g_list_prepend (NULL, undo_info);
tg_tool->redo_list = NULL;
/* Save the current transformation info */
memcpy (undo_info->trans_infos, tg_tool->trans_infos,
sizeof (tg_tool->trans_infos));
return TRUE;
}
static void
gimp_transform_grid_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
break;
case GIMP_TOOL_ACTION_RESUME:
gimp_transform_tool_recalc_matrix (tr_tool, display);
break;
case GIMP_TOOL_ACTION_HALT:
gimp_transform_grid_tool_halt (tg_tool);
break;
case GIMP_TOOL_ACTION_COMMIT:
if (tool->display)
gimp_transform_grid_tool_commit (tg_tool);
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
gimp_transform_grid_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
if (tg_tool->widget)
{
gimp_tool_widget_hover (tg_tool->widget, coords, state, TRUE);
if (gimp_tool_widget_button_press (tg_tool->widget, coords, time, state,
press_type))
{
tg_tool->grab_widget = tg_tool->widget;
}
}
gimp_tool_control_activate (tool->control);
}
static void
gimp_transform_grid_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
gimp_tool_control_halt (tool->control);
if (tg_tool->grab_widget)
{
gimp_tool_widget_button_release (tg_tool->grab_widget,
coords, time, state, release_type);
tg_tool->grab_widget = NULL;
}
if (release_type != GIMP_BUTTON_RELEASE_CANCEL)
{
/* We're done with an interaction, save it on the undo list */
gimp_transform_grid_tool_push_internal_undo (tg_tool);
}
else
{
UndoInfo *undo_info = tg_tool->undo_list->data;
/* Restore the last saved state */
memcpy (tg_tool->trans_infos, undo_info->trans_infos,
sizeof (tg_tool->trans_infos));
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool, display);
}
}
static void
gimp_transform_grid_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
if (tg_tool->grab_widget)
{
gimp_tool_widget_motion (tg_tool->grab_widget, coords, time, state);
}
}
static void
gimp_transform_grid_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
if (tg_tool->widget)
{
GIMP_TOOL_CLASS (parent_class)->modifier_key (tool, key, press,
state, display);
}
else
{
GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tool);
if (key == gimp_get_constrain_behavior_mask ())
{
g_object_set (options,
"frompivot-scale", ! options->frompivot_scale,
"frompivot-shear", ! options->frompivot_shear,
"frompivot-perspective", ! options->frompivot_perspective,
NULL);
}
else if (key == gimp_get_extend_selection_mask ())
{
g_object_set (options,
"cornersnap", ! options->cornersnap,
"constrain-move", ! options->constrain_move,
"constrain-scale", ! options->constrain_scale,
"constrain-rotate", ! options->constrain_rotate,
"constrain-shear", ! options->constrain_shear,
"constrain-perspective", ! options->constrain_perspective,
NULL);
}
}
}
static void
gimp_transform_grid_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
if (display != tool->display &&
! gimp_transform_tool_check_active_item (tr_tool, display, NULL))
{
gimp_tool_set_cursor (tool, display,
gimp_tool_control_get_cursor (tool->control),
gimp_tool_control_get_tool_cursor (tool->control),
GIMP_CURSOR_MODIFIER_BAD);
return;
}
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static const gchar *
gimp_transform_grid_tool_can_undo (GimpTool *tool,
GimpDisplay *display)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
if (! tg_tool->undo_list || ! tg_tool->undo_list->next)
return NULL;
return _("Transform Step");
}
static const gchar *
gimp_transform_grid_tool_can_redo (GimpTool *tool,
GimpDisplay *display)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
if (! tg_tool->redo_list)
return NULL;
return _("Transform Step");
}
static gboolean
gimp_transform_grid_tool_undo (GimpTool *tool,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
UndoInfo *undo_info;
GimpTransformDirection direction;
undo_info = tg_tool->undo_list->data;
direction = undo_info->direction;
/* Move undo_info from undo_list to redo_list */
tg_tool->redo_list = g_list_prepend (tg_tool->redo_list, undo_info);
tg_tool->undo_list = g_list_remove (tg_tool->undo_list, undo_info);
undo_info = tg_tool->undo_list->data;
/* Restore the previous transformation info */
memcpy (tg_tool->trans_infos, undo_info->trans_infos,
sizeof (tg_tool->trans_infos));
/* Restore the previous transformation direction */
if (direction != tr_options->direction)
{
g_object_set (tr_options,
"direction", direction,
NULL);
}
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool, display);
return TRUE;
}
static gboolean
gimp_transform_grid_tool_redo (GimpTool *tool,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tool);
UndoInfo *undo_info;
GimpTransformDirection direction;
undo_info = tg_tool->redo_list->data;
direction = undo_info->direction;
/* Move undo_info from redo_list to undo_list */
tg_tool->undo_list = g_list_prepend (tg_tool->undo_list, undo_info);
tg_tool->redo_list = g_list_remove (tg_tool->redo_list, undo_info);
/* Restore the previous transformation info */
memcpy (tg_tool->trans_infos, undo_info->trans_infos,
sizeof (tg_tool->trans_infos));
/* Restore the previous transformation direction */
if (direction != tr_options->direction)
{
g_object_set (tr_options,
"direction", direction,
NULL);
}
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool, display);
return TRUE;
}
static void
gimp_transform_grid_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tool);
GimpTransformGridOptions *tg_options = GIMP_TRANSFORM_GRID_OPTIONS (options);
GIMP_TOOL_CLASS (parent_class)->options_notify (tool, options, pspec);
if (! strcmp (pspec->name, "type"))
{
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, tool->display);
return;
}
if (! tg_tool->widget)
return;
if (! strcmp (pspec->name, "direction"))
{
/* recalculate the tool's transformation matrix */
gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
}
else if (! strcmp (pspec->name, "show-preview"))
{
if (tg_tool->preview)
{
GimpDisplay *display;
GimpItem *item;
gboolean show_preview;
show_preview = gimp_transform_grid_options_show_preview (tg_options) &&
tr_tool->transform_valid;
gimp_canvas_item_set_visible (tg_tool->preview, show_preview);
display = tool->display;
item = gimp_transform_tool_get_active_item (tr_tool, display);
if (item)
{
if (gimp_transform_grid_options_show_preview (tg_options))
gimp_transform_grid_tool_hide_active_item (tg_tool, item);
else
gimp_transform_grid_tool_show_active_item (tg_tool);
}
}
}
else if (g_str_has_prefix (pspec->name, "constrain-") ||
g_str_has_prefix (pspec->name, "frompivot-") ||
! strcmp (pspec->name, "fixedpivot") ||
! strcmp (pspec->name, "cornersnap"))
{
gimp_transform_grid_tool_dialog_update (tg_tool);
}
}
static void
gimp_transform_grid_tool_draw (GimpDrawTool *draw_tool)
{
GimpTool *tool = GIMP_TOOL (draw_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (draw_tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (draw_tool);
GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_OPTIONS (options);
GimpImage *image = gimp_display_get_image (tool->display);
GimpMatrix3 matrix = tr_tool->transform;
GimpCanvasItem *item;
if (tr_options->direction == GIMP_TRANSFORM_BACKWARD)
gimp_matrix3_invert (&matrix);
if (tg_tool->widget)
{
gboolean show_preview = gimp_transform_grid_options_show_preview (options) &&
tr_tool->transform_valid;
tg_tool->preview =
gimp_draw_tool_add_transform_preview (draw_tool,
tool->drawable,
&matrix,
tr_tool->x1,
tr_tool->y1,
tr_tool->x2,
tr_tool->y2);
g_object_add_weak_pointer (G_OBJECT (tg_tool->preview),
(gpointer) &tg_tool->preview);
gimp_canvas_item_set_visible (tg_tool->preview, show_preview);
g_object_bind_property (G_OBJECT (options), "preview-opacity",
G_OBJECT (tg_tool->preview), "opacity",
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
GIMP_DRAW_TOOL_CLASS (parent_class)->draw (draw_tool);
}
if (tr_options->type == GIMP_TRANSFORM_TYPE_SELECTION)
{
const GimpBoundSeg *segs_in;
const GimpBoundSeg *segs_out;
gint n_segs_in;
gint n_segs_out;
gimp_channel_boundary (gimp_image_get_mask (image),
&segs_in, &segs_out,
&n_segs_in, &n_segs_out,
0, 0, 0, 0);
if (segs_in)
{
tg_tool->boundary_in =
gimp_draw_tool_add_boundary (draw_tool,
segs_in, n_segs_in,
&matrix,
0, 0);
g_object_add_weak_pointer (G_OBJECT (tg_tool->boundary_in),
(gpointer) &tg_tool->boundary_in);
gimp_canvas_item_set_visible (tg_tool->boundary_in,
tr_tool->transform_valid);
}
if (segs_out)
{
tg_tool->boundary_out =
gimp_draw_tool_add_boundary (draw_tool,
segs_out, n_segs_out,
&matrix,
0, 0);
g_object_add_weak_pointer (G_OBJECT (tg_tool->boundary_in),
(gpointer) &tg_tool->boundary_out);
gimp_canvas_item_set_visible (tg_tool->boundary_out,
tr_tool->transform_valid);
}
}
else if (tr_options->type == GIMP_TRANSFORM_TYPE_PATH)
{
GimpVectors *vectors = gimp_image_get_active_vectors (image);
if (vectors)
{
GimpStroke *stroke = NULL;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
GArray *coords;
gboolean closed;
coords = gimp_stroke_interpolate (stroke, 1.0, &closed);
if (coords && coords->len)
{
item =
gimp_draw_tool_add_strokes (draw_tool,
&g_array_index (coords,
GimpCoords, 0),
coords->len, &matrix, FALSE);
g_ptr_array_add (tg_tool->strokes, item);
g_object_weak_ref (G_OBJECT (item),
(GWeakNotify) g_ptr_array_remove,
tg_tool->strokes);
gimp_canvas_item_set_visible (item, tr_tool->transform_valid);
}
if (coords)
g_array_free (coords, TRUE);
}
}
}
}
static void
gimp_transform_grid_tool_recalc_matrix (GimpTransformTool *tr_tool)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tr_tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
GimpTransformGridOptions *tg_options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tr_tool);
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->info_to_matrix)
{
GimpMatrix3 forward_transform;
GimpMatrix3 backward_transform;
gboolean forward_transform_valid;
gboolean backward_transform_valid;
tg_tool->trans_info = tg_tool->trans_infos[GIMP_TRANSFORM_FORWARD];
forward_transform_valid = gimp_transform_grid_tool_info_to_matrix (
tg_tool, &forward_transform);
tg_tool->trans_info = tg_tool->trans_infos[GIMP_TRANSFORM_BACKWARD];
backward_transform_valid = gimp_transform_grid_tool_info_to_matrix (
tg_tool, &backward_transform);
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->matrix_to_info &&
tg_options->direction_linked)
{
GimpMatrix3 transform = tr_tool->transform;
switch (tr_options->direction)
{
case GIMP_TRANSFORM_FORWARD:
if (forward_transform_valid)
{
gimp_matrix3_invert (&transform);
backward_transform = forward_transform;
gimp_matrix3_mult (&transform, &backward_transform);
tg_tool->trans_info =
tg_tool->trans_infos[GIMP_TRANSFORM_BACKWARD];
gimp_transform_grid_tool_matrix_to_info (tg_tool,
&backward_transform);
backward_transform_valid =
gimp_transform_grid_tool_info_to_matrix (
tg_tool, &backward_transform);
}
break;
case GIMP_TRANSFORM_BACKWARD:
if (backward_transform_valid)
{
forward_transform = backward_transform;
gimp_matrix3_mult (&transform, &forward_transform);
tg_tool->trans_info =
tg_tool->trans_infos[GIMP_TRANSFORM_FORWARD];
gimp_transform_grid_tool_matrix_to_info (tg_tool,
&forward_transform);
forward_transform_valid =
gimp_transform_grid_tool_info_to_matrix (
tg_tool, &forward_transform);
}
break;
}
}
else if (forward_transform_valid && backward_transform_valid)
{
tr_tool->transform = backward_transform;
gimp_matrix3_invert (&tr_tool->transform);
gimp_matrix3_mult (&forward_transform, &tr_tool->transform);
}
tr_tool->transform_valid = forward_transform_valid &&
backward_transform_valid;
}
tg_tool->trans_info = tg_tool->trans_infos[tr_options->direction];
gimp_transform_grid_tool_dialog_update (tg_tool);
gimp_transform_grid_tool_update_sensitivity (tg_tool);
gimp_transform_grid_tool_update_widget (tg_tool);
gimp_transform_grid_tool_update_preview (tg_tool);
if (tg_tool->gui)
gimp_tool_gui_show (tg_tool->gui);
}
static gchar *
gimp_transform_grid_tool_get_undo_desc (GimpTransformTool *tr_tool)
{
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tr_tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
gchar *result;
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->matrix_to_info)
{
TransInfo trans_info;
memcpy (&trans_info, &tg_tool->init_trans_info, sizeof (TransInfo));
tg_tool->trans_info = trans_info;
gimp_transform_grid_tool_matrix_to_info (tg_tool, &tr_tool->transform);
result = GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->get_undo_desc (
tg_tool);
}
else if (! memcmp (tg_tool->trans_infos[GIMP_TRANSFORM_BACKWARD],
tg_tool->init_trans_info, sizeof (TransInfo)))
{
tg_tool->trans_info = tg_tool->trans_infos[GIMP_TRANSFORM_FORWARD];
result = GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->get_undo_desc (
tg_tool);
}
else if (! memcmp (tg_tool->trans_infos[GIMP_TRANSFORM_FORWARD],
tg_tool->init_trans_info, sizeof (TransInfo)))
{
gchar *desc;
tg_tool->trans_info = tg_tool->trans_infos[GIMP_TRANSFORM_BACKWARD];
desc = GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->get_undo_desc (
tg_tool);
result = g_strdup_printf (_("%s (Corrective)"), desc);
g_free (desc);
}
else
{
result = GIMP_TRANSFORM_TOOL_CLASS (parent_class)->get_undo_desc (
tr_tool);
}
tg_tool->trans_info = tg_tool->trans_infos[tr_options->direction];
return result;
}
static GimpTransformDirection
gimp_transform_grid_tool_get_direction (GimpTransformTool *tr_tool)
{
return GIMP_TRANSFORM_FORWARD;
}
static GeglBuffer *
gimp_transform_grid_tool_transform (GimpTransformTool *tr_tool,
GimpItem *item,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
GimpTool *tool = GIMP_TOOL (tr_tool);
GimpTransformGridTool *tg_tool = GIMP_TRANSFORM_GRID_TOOL (tr_tool);
GimpDisplay *display = tool->display;
GimpImage *image = gimp_display_get_image (display);
GeglBuffer *new_buffer;
/* Send the request for the transformation to the tool...
*/
new_buffer =
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->transform (tg_tool,
item,
orig_buffer,
orig_offset_x,
orig_offset_y,
buffer_profile,
new_offset_x,
new_offset_y);
gimp_image_undo_push (image, GIMP_TYPE_TRANSFORM_GRID_TOOL_UNDO,
GIMP_UNDO_TRANSFORM_GRID, NULL,
0,
"transform-tool", tg_tool,
NULL);
return new_buffer;
}
static gchar *
gimp_transform_grid_tool_real_get_undo_desc (GimpTransformGridTool *tg_tool)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
return GIMP_TRANSFORM_TOOL_CLASS (parent_class)->get_undo_desc (tr_tool);
}
static void
gimp_transform_grid_tool_real_update_widget (GimpTransformGridTool *tg_tool)
{
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->info_to_matrix)
{
GimpMatrix3 transform;
gimp_transform_grid_tool_info_to_matrix (tg_tool, &transform);
g_object_set (tg_tool->widget,
"transform", &transform,
NULL);
}
}
static void
gimp_transform_grid_tool_real_widget_changed (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GimpToolWidget *widget = tg_tool->widget;
/* suppress the call to GimpTransformGridTool::update_widget() when
* recalculating the matrix
*/
tg_tool->widget = NULL;
gimp_transform_tool_recalc_matrix (tr_tool, tool->display);
tg_tool->widget = widget;
}
static GeglBuffer *
gimp_transform_grid_tool_real_transform (GimpTransformGridTool *tg_tool,
GimpItem *item,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
return GIMP_TRANSFORM_TOOL_CLASS (parent_class)->transform (tr_tool,
item,
orig_buffer,
orig_offset_x,
orig_offset_y,
buffer_profile,
new_offset_x,
new_offset_y);
}
static void
gimp_transform_grid_tool_widget_changed (GimpToolWidget *widget,
GimpTransformGridTool *tg_tool)
{
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->widget_changed)
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->widget_changed (tg_tool);
}
static void
gimp_transform_grid_tool_widget_response (GimpToolWidget *widget,
gint response_id,
GimpTransformGridTool *tg_tool)
{
switch (response_id)
{
case GIMP_TOOL_WIDGET_RESPONSE_CONFIRM:
gimp_transform_grid_tool_response (NULL, GTK_RESPONSE_OK, tg_tool);
break;
case GIMP_TOOL_WIDGET_RESPONSE_CANCEL:
gimp_transform_grid_tool_response (NULL, GTK_RESPONSE_CANCEL, tg_tool);
break;
case GIMP_TOOL_WIDGET_RESPONSE_RESET:
gimp_transform_grid_tool_response (NULL, RESPONSE_RESET, tg_tool);
break;
}
}
static void
gimp_transform_grid_tool_halt (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tg_tool)))
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tg_tool));
gimp_draw_tool_set_widget (GIMP_DRAW_TOOL (tg_tool), NULL);
g_clear_object (&tg_tool->widget);
if (tg_tool->gui)
gimp_tool_gui_hide (tg_tool->gui);
if (tg_tool->redo_list)
{
g_list_free_full (tg_tool->redo_list, (GDestroyNotify) undo_info_free);
tg_tool->redo_list = NULL;
}
if (tg_tool->undo_list)
{
g_list_free_full (tg_tool->undo_list, (GDestroyNotify) undo_info_free);
tg_tool->undo_list = NULL;
}
gimp_transform_grid_tool_show_active_item (tg_tool);
tool->display = NULL;
tool->drawable = NULL;
tr_tool->item = NULL;
}
static void
gimp_transform_grid_tool_commit (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GimpDisplay *display = tool->display;
/* undraw the tool before we muck around with the transform matrix */
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tg_tool));
gimp_transform_tool_transform (tr_tool, display);
}
static void
gimp_transform_grid_tool_dialog (GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpToolInfo *tool_info = tool->tool_info;
GimpDisplayShell *shell;
const gchar *ok_button_label;
if (! GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->dialog)
return;
g_return_if_fail (tool->display != NULL);
shell = gimp_display_get_shell (tool->display);
ok_button_label = GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->ok_button_label;
tg_tool->gui = gimp_tool_gui_new (tool_info,
NULL, NULL, NULL, NULL,
gimp_widget_get_monitor (GTK_WIDGET (shell)),
TRUE,
_("_Reset"), RESPONSE_RESET,
_("_Cancel"), GTK_RESPONSE_CANCEL,
ok_button_label, GTK_RESPONSE_OK,
NULL);
gimp_tool_gui_set_auto_overlay (tg_tool->gui, TRUE);
gimp_tool_gui_set_default_response (tg_tool->gui, GTK_RESPONSE_OK);
gimp_tool_gui_set_alternative_button_order (tg_tool->gui,
RESPONSE_RESET,
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
g_signal_connect (tg_tool->gui, "response",
G_CALLBACK (gimp_transform_grid_tool_response),
tg_tool);
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->dialog (tg_tool);
}
static void
gimp_transform_grid_tool_dialog_update (GimpTransformGridTool *tg_tool)
{
if (tg_tool->gui &&
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->dialog_update)
{
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->dialog_update (tg_tool);
}
}
static void
gimp_transform_grid_tool_prepare (GimpTransformGridTool *tg_tool,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
if (tg_tool->gui)
{
GimpItem *item = gimp_transform_tool_get_active_item (tr_tool, display);
gimp_tool_gui_set_shell (tg_tool->gui, gimp_display_get_shell (display));
gimp_tool_gui_set_viewable (tg_tool->gui, GIMP_VIEWABLE (item));
}
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->prepare)
{
tg_tool->trans_info = tg_tool->init_trans_info;
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->prepare (tg_tool);
memcpy (tg_tool->trans_infos[GIMP_TRANSFORM_FORWARD],
tg_tool->init_trans_info, sizeof (TransInfo));
memcpy (tg_tool->trans_infos[GIMP_TRANSFORM_BACKWARD],
tg_tool->init_trans_info, sizeof (TransInfo));
}
gimp_matrix3_identity (&tr_tool->transform);
tr_tool->transform_valid = TRUE;
}
static GimpToolWidget *
gimp_transform_grid_tool_get_widget (GimpTransformGridTool *tg_tool)
{
static const gchar *properties[] =
{
"constrain-move",
"constrain-scale",
"constrain-rotate",
"constrain-shear",
"constrain-perspective",
"frompivot-scale",
"frompivot-shear",
"frompivot-perspective",
"cornersnap",
"fixedpivot"
};
GimpToolWidget *widget = NULL;
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->get_widget)
{
GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
gint i;
widget = GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->get_widget (tg_tool);
gimp_draw_tool_set_widget (GIMP_DRAW_TOOL (tg_tool), widget);
g_object_bind_property (G_OBJECT (options), "grid-type",
G_OBJECT (widget), "guide-type",
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
g_object_bind_property (G_OBJECT (options), "grid-size",
G_OBJECT (widget), "n-guides",
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
for (i = 0; i < G_N_ELEMENTS (properties); i++)
g_object_bind_property (G_OBJECT (options), properties[i],
G_OBJECT (widget), properties[i],
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
g_signal_connect (widget, "changed",
G_CALLBACK (gimp_transform_grid_tool_widget_changed),
tg_tool);
g_signal_connect (widget, "response",
G_CALLBACK (gimp_transform_grid_tool_widget_response),
tg_tool);
}
return widget;
}
static void
gimp_transform_grid_tool_update_widget (GimpTransformGridTool *tg_tool)
{
if (tg_tool->widget &&
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->update_widget)
{
g_signal_handlers_block_by_func (
tg_tool->widget,
G_CALLBACK (gimp_transform_grid_tool_widget_changed),
tg_tool);
GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->update_widget (tg_tool);
g_signal_handlers_unblock_by_func (
tg_tool->widget,
G_CALLBACK (gimp_transform_grid_tool_widget_changed),
tg_tool);
}
}
static void
gimp_transform_grid_tool_response (GimpToolGui *gui,
gint response_id,
GimpTransformGridTool *tg_tool)
{
GimpTool *tool = GIMP_TOOL (tg_tool);
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GimpDisplay *display = tool->display;
switch (response_id)
{
case RESPONSE_RESET:
/* restore the initial transformation info */
memcpy (tg_tool->trans_info, tg_tool->init_trans_info,
sizeof (TransInfo));
/* recalculate the tool's transformtion matrix */
gimp_transform_tool_recalc_matrix (tr_tool, display);
/* push the restored info to the undo stack */
gimp_transform_grid_tool_push_internal_undo (tg_tool);
break;
case GTK_RESPONSE_OK:
g_return_if_fail (display != NULL);
gimp_tool_control (tool, GIMP_TOOL_ACTION_COMMIT, display);
break;
default:
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
/* update the undo actions / menu items */
if (display)
gimp_image_flush (gimp_display_get_image (display));
break;
}
}
static void
gimp_transform_grid_tool_update_sensitivity (GimpTransformGridTool *tg_tool)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
if (! tg_tool->gui)
return;
gimp_tool_gui_set_response_sensitive (tg_tool->gui, GTK_RESPONSE_OK,
tr_tool->transform_valid);
gimp_tool_gui_set_response_sensitive (tg_tool->gui, RESPONSE_RESET,
memcmp (tg_tool->trans_info,
tg_tool->init_trans_info,
sizeof (TransInfo)) != 0);
}
static void
gimp_transform_grid_tool_update_preview (GimpTransformGridTool *tg_tool)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tg_tool);
GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
gint i;
if (tg_tool->preview)
{
gboolean show_preview = gimp_transform_grid_options_show_preview (options) &&
tr_tool->transform_valid;
gimp_canvas_item_begin_change (tg_tool->preview);
gimp_canvas_item_set_visible (tg_tool->preview, show_preview);
g_object_set (tg_tool->preview,
"transform", &tr_tool->transform,
NULL);
gimp_canvas_item_end_change (tg_tool->preview);
}
if (tg_tool->boundary_in)
{
gimp_canvas_item_begin_change (tg_tool->boundary_in);
gimp_canvas_item_set_visible (tg_tool->boundary_in,
tr_tool->transform_valid);
g_object_set (tg_tool->boundary_in,
"transform", &tr_tool->transform,
NULL);
gimp_canvas_item_end_change (tg_tool->boundary_in);
}
if (tg_tool->boundary_out)
{
gimp_canvas_item_begin_change (tg_tool->boundary_out);
gimp_canvas_item_set_visible (tg_tool->boundary_out,
tr_tool->transform_valid);
g_object_set (tg_tool->boundary_out,
"transform", &tr_tool->transform,
NULL);
gimp_canvas_item_end_change (tg_tool->boundary_out);
}
for (i = 0; i < tg_tool->strokes->len; i++)
{
GimpCanvasItem *item = g_ptr_array_index (tg_tool->strokes, i);
gimp_canvas_item_begin_change (item);
gimp_canvas_item_set_visible (item, tr_tool->transform_valid);
g_object_set (item,
"transform", &tr_tool->transform,
NULL);
gimp_canvas_item_end_change (item);
}
}
static void
gimp_transform_grid_tool_hide_active_item (GimpTransformGridTool *tg_tool,
GimpItem *item)
{
GimpTransformGridOptions *options = GIMP_TRANSFORM_GRID_TOOL_GET_OPTIONS (tg_tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_OPTIONS (options);
GimpDisplay *display = GIMP_TOOL (tg_tool)->display;
GimpImage *image = gimp_display_get_image (display);
/* hide only complete layers and channels, not layer masks */
if (tr_options->type == GIMP_TRANSFORM_TYPE_LAYER &&
options->show_preview &&
GIMP_IS_DRAWABLE (item) &&
! GIMP_IS_LAYER_MASK (item) &&
gimp_item_get_visible (item) &&
gimp_channel_is_empty (gimp_image_get_mask (image)))
{
tg_tool->hidden_item = item;
gimp_item_set_visible (item, FALSE, FALSE);
gimp_projection_flush (gimp_image_get_projection (image));
}
}
static void
gimp_transform_grid_tool_show_active_item (GimpTransformGridTool *tg_tool)
{
if (tg_tool->hidden_item)
{
GimpDisplay *display = GIMP_TOOL (tg_tool)->display;
GimpImage *image = gimp_display_get_image (display);
gimp_item_set_visible (tg_tool->hidden_item, TRUE, FALSE);
tg_tool->hidden_item = NULL;
gimp_image_flush (image);
}
}
static UndoInfo *
undo_info_new (void)
{
return g_slice_new0 (UndoInfo);
}
static void
undo_info_free (UndoInfo *info)
{
g_slice_free (UndoInfo, info);
}
gboolean
gimp_transform_grid_tool_info_to_matrix (GimpTransformGridTool *tg_tool,
GimpMatrix3 *transform)
{
g_return_val_if_fail (GIMP_IS_TRANSFORM_GRID_TOOL (tg_tool), FALSE);
g_return_val_if_fail (transform != NULL, FALSE);
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->info_to_matrix)
{
return GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->info_to_matrix (
tg_tool, transform);
}
return FALSE;
}
void
gimp_transform_grid_tool_matrix_to_info (GimpTransformGridTool *tg_tool,
const GimpMatrix3 *transform)
{
g_return_if_fail (GIMP_IS_TRANSFORM_GRID_TOOL (tg_tool));
g_return_if_fail (transform != NULL);
if (GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->matrix_to_info)
{
return GIMP_TRANSFORM_GRID_TOOL_GET_CLASS (tg_tool)->matrix_to_info (
tg_tool, transform);
}
}
void
gimp_transform_grid_tool_push_internal_undo (GimpTransformGridTool *tg_tool)
{
UndoInfo *undo_info;
g_return_if_fail (GIMP_IS_TRANSFORM_GRID_TOOL (tg_tool));
g_return_if_fail (tg_tool->undo_list != NULL);
undo_info = tg_tool->undo_list->data;
/* push current state on the undo list and set this state as the
* current state, but avoid doing this if there were no changes
*/
if (memcmp (undo_info->trans_infos, tg_tool->trans_infos,
sizeof (tg_tool->trans_infos)) != 0)
{
GimpTransformOptions *tr_options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tg_tool);
undo_info = undo_info_new ();
undo_info->direction = tr_options->direction;
memcpy (undo_info->trans_infos, tg_tool->trans_infos,
sizeof (tg_tool->trans_infos));
tg_tool->undo_list = g_list_prepend (tg_tool->undo_list, undo_info);
/* If we undid anything and started interacting, we have to
* discard the redo history
*/
g_list_free_full (tg_tool->redo_list, (GDestroyNotify) undo_info_free);
tg_tool->redo_list = NULL;
gimp_transform_grid_tool_update_sensitivity (tg_tool);
/* update the undo actions / menu items */
gimp_image_flush (gimp_display_get_image (GIMP_TOOL (tg_tool)->display));
}
}
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