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PIKApp/app/tools/pikacagetool.c

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/* 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):
*
* pikacagetool.c
* Copyright (C) 2010 Michael Muré <batolettre@gmail.com>
*
* 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 <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libpikamath/pikamath.h"
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "config/pikaguiconfig.h"
#include "gegl/pika-gegl-utils.h"
#include "operations/pikacageconfig.h"
#include "core/pika.h"
#include "core/pikadrawablefilter.h"
#include "core/pikaerror.h"
#include "core/pikaimage.h"
#include "core/pikaitem.h"
#include "core/pikaprogress.h"
#include "core/pikaprojection.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikawidgets-utils.h"
#include "display/pikacanvasitem.h"
#include "display/pikadisplay.h"
#include "pikacagetool.h"
#include "pikacageoptions.h"
#include "pikatoolcontrol.h"
#include "pikatools-utils.h"
#include "pika-intl.h"
/* XXX: if this state list is updated, in particular if for some reason,
a new CAGE_STATE_* was to be inserted after CAGE_STATE_CLOSING, check
if the function pika_cage_tool_is_complete() has to be updated.
Current algorithm is that all DEFORM_* states are complete states,
and all CAGE_* states are incomplete states. */
enum
{
CAGE_STATE_INIT,
CAGE_STATE_WAIT,
CAGE_STATE_MOVE_HANDLE,
CAGE_STATE_SELECTING,
CAGE_STATE_CLOSING,
DEFORM_STATE_WAIT,
DEFORM_STATE_MOVE_HANDLE,
DEFORM_STATE_SELECTING
};
static gboolean pika_cage_tool_initialize (PikaTool *tool,
PikaDisplay *display,
GError **error);
static void pika_cage_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static void pika_cage_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display);
static void pika_cage_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_cage_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static gboolean pika_cage_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display);
static void pika_cage_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display);
static void pika_cage_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display);
static void pika_cage_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec);
static void pika_cage_tool_draw (PikaDrawTool *draw_tool);
static void pika_cage_tool_start (PikaCageTool *ct,
PikaDisplay *display);
static void pika_cage_tool_halt (PikaCageTool *ct);
static void pika_cage_tool_commit (PikaCageTool *ct);
static gint pika_cage_tool_is_on_handle (PikaCageTool *ct,
PikaDrawTool *draw_tool,
PikaDisplay *display,
gdouble x,
gdouble y,
gint handle_size);
static gint pika_cage_tool_is_on_edge (PikaCageTool *ct,
gdouble x,
gdouble y,
gint handle_size);
static gboolean pika_cage_tool_is_complete (PikaCageTool *ct);
static void pika_cage_tool_remove_last_handle (PikaCageTool *ct);
static void pika_cage_tool_compute_coef (PikaCageTool *ct);
static void pika_cage_tool_create_filter (PikaCageTool *ct);
static void pika_cage_tool_filter_flush (PikaDrawableFilter *filter,
PikaTool *tool);
static void pika_cage_tool_filter_update (PikaCageTool *ct);
static void pika_cage_tool_create_render_node (PikaCageTool *ct);
static void pika_cage_tool_render_node_update (PikaCageTool *ct);
G_DEFINE_TYPE (PikaCageTool, pika_cage_tool, PIKA_TYPE_DRAW_TOOL)
#define parent_class pika_cage_tool_parent_class
void
pika_cage_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_CAGE_TOOL,
PIKA_TYPE_CAGE_OPTIONS,
pika_cage_options_gui,
0,
"pika-cage-tool",
_("Cage Transform"),
_("Cage Transform: Deform a selection with a cage"),
N_("_Cage Transform"), "<shift>G",
NULL, PIKA_HELP_TOOL_CAGE,
PIKA_ICON_TOOL_CAGE,
data);
}
static void
pika_cage_tool_class_init (PikaCageToolClass *klass)
{
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
PikaDrawToolClass *draw_tool_class = PIKA_DRAW_TOOL_CLASS (klass);
tool_class->initialize = pika_cage_tool_initialize;
tool_class->control = pika_cage_tool_control;
tool_class->button_press = pika_cage_tool_button_press;
tool_class->button_release = pika_cage_tool_button_release;
tool_class->key_press = pika_cage_tool_key_press;
tool_class->motion = pika_cage_tool_motion;
tool_class->cursor_update = pika_cage_tool_cursor_update;
tool_class->oper_update = pika_cage_tool_oper_update;
tool_class->options_notify = pika_cage_tool_options_notify;
draw_tool_class->draw = pika_cage_tool_draw;
}
static void
pika_cage_tool_init (PikaCageTool *self)
{
PikaTool *tool = PIKA_TOOL (self);
pika_tool_control_set_preserve (tool->control, FALSE);
pika_tool_control_set_dirty_mask (tool->control,
PIKA_DIRTY_IMAGE |
PIKA_DIRTY_IMAGE_STRUCTURE |
PIKA_DIRTY_DRAWABLE |
PIKA_DIRTY_SELECTION |
PIKA_DIRTY_ACTIVE_DRAWABLE);
pika_tool_control_set_wants_click (tool->control, TRUE);
pika_tool_control_set_precision (tool->control,
PIKA_CURSOR_PRECISION_SUBPIXEL);
pika_tool_control_set_tool_cursor (tool->control,
PIKA_TOOL_CURSOR_PERSPECTIVE);
self->config = g_object_new (PIKA_TYPE_CAGE_CONFIG, NULL);
self->hovering_handle = -1;
self->tool_state = CAGE_STATE_INIT;
}
static gboolean
pika_cage_tool_initialize (PikaTool *tool,
PikaDisplay *display,
GError **error)
{
PikaGuiConfig *config = PIKA_GUI_CONFIG (display->pika->config);
PikaImage *image = pika_display_get_image (display);
PikaItem *locked_item = NULL;
GList *drawables = pika_image_get_selected_drawables (image);
PikaDrawable *drawable;
if (g_list_length (drawables) != 1)
{
if (g_list_length (drawables) > 1)
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("Cannot modify multiple layers. Select only one layer."));
else
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED, _("No selected drawables."));
g_list_free (drawables);
return FALSE;
}
drawable = drawables->data;
g_list_free (drawables);
if (pika_viewable_get_children (PIKA_VIEWABLE (drawable)))
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("Cannot modify the pixels of layer groups."));
return FALSE;
}
if (pika_item_is_content_locked (PIKA_ITEM (drawable), &locked_item))
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("The selected item's pixels are locked."));
if (error)
pika_tools_blink_lock_box (display->pika, locked_item);
return FALSE;
}
if (! pika_item_is_visible (PIKA_ITEM (drawable)) &&
! config->edit_non_visible)
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("The active item is not visible."));
return FALSE;
}
pika_cage_tool_start (PIKA_CAGE_TOOL (tool), display);
return TRUE;
}
static void
pika_cage_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
pika_cage_tool_halt (ct);
break;
case PIKA_TOOL_ACTION_COMMIT:
pika_cage_tool_commit (ct);
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
pika_cage_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
gint handle = -1;
gint edge = -1;
pika_tool_control_activate (tool->control);
if (ct->config)
{
handle = pika_cage_tool_is_on_handle (ct,
draw_tool,
display,
coords->x,
coords->y,
PIKA_TOOL_HANDLE_SIZE_CIRCLE);
edge = pika_cage_tool_is_on_edge (ct,
coords->x,
coords->y,
PIKA_TOOL_HANDLE_SIZE_CIRCLE);
}
ct->movement_start_x = coords->x;
ct->movement_start_y = coords->y;
switch (ct->tool_state)
{
case CAGE_STATE_INIT:
/* No handle yet, we add the first one and switch the tool to
* moving handle state.
*/
pika_cage_config_add_cage_point (ct->config,
coords->x - ct->offset_x,
coords->y - ct->offset_y);
pika_cage_config_select_point (ct->config, 0);
ct->tool_state = CAGE_STATE_MOVE_HANDLE;
break;
case CAGE_STATE_WAIT:
if (handle == -1 && edge <= 0)
{
/* User clicked on the background, we add a new handle
* and move it
*/
pika_cage_config_add_cage_point (ct->config,
coords->x - ct->offset_x,
coords->y - ct->offset_y);
pika_cage_config_select_point (ct->config,
pika_cage_config_get_n_points (ct->config) - 1);
ct->tool_state = CAGE_STATE_MOVE_HANDLE;
}
else if (handle == 0 && pika_cage_config_get_n_points (ct->config) > 2)
{
/* User clicked on the first handle, we wait for
* release for closing the cage and switching to
* deform if possible
*/
pika_cage_config_select_point (ct->config, 0);
ct->tool_state = CAGE_STATE_CLOSING;
}
else if (handle >= 0)
{
/* User clicked on a handle, so we move it */
if (state & pika_get_extend_selection_mask ())
{
/* Multiple selection */
pika_cage_config_toggle_point_selection (ct->config, handle);
}
else
{
/* New selection */
if (! pika_cage_config_point_is_selected (ct->config, handle))
{
pika_cage_config_select_point (ct->config, handle);
}
}
ct->tool_state = CAGE_STATE_MOVE_HANDLE;
}
else if (edge > 0)
{
/* User clicked on an edge, we add a new handle here and select it */
pika_cage_config_insert_cage_point (ct->config, edge,
coords->x, coords->y);
pika_cage_config_select_point (ct->config, edge);
ct->tool_state = CAGE_STATE_MOVE_HANDLE;
}
break;
case DEFORM_STATE_WAIT:
if (handle == -1)
{
/* User clicked on the background, we start a rubber band
* selection
*/
ct->selection_start_x = coords->x;
ct->selection_start_y = coords->y;
ct->tool_state = DEFORM_STATE_SELECTING;
}
if (handle >= 0)
{
/* User clicked on a handle, so we move it */
if (state & pika_get_extend_selection_mask ())
{
/* Multiple selection */
pika_cage_config_toggle_point_selection (ct->config, handle);
}
else
{
/* New selection */
if (! pika_cage_config_point_is_selected (ct->config, handle))
{
pika_cage_config_select_point (ct->config, handle);
}
}
ct->tool_state = DEFORM_STATE_MOVE_HANDLE;
}
break;
}
}
void
pika_cage_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
pika_draw_tool_pause (PIKA_DRAW_TOOL (ct));
pika_tool_control_halt (tool->control);
if (release_type == PIKA_BUTTON_RELEASE_CANCEL)
{
/* Cancelling */
switch (ct->tool_state)
{
case CAGE_STATE_CLOSING:
ct->tool_state = CAGE_STATE_WAIT;
break;
case CAGE_STATE_MOVE_HANDLE:
pika_cage_config_remove_last_cage_point (ct->config);
ct->tool_state = CAGE_STATE_WAIT;
break;
case CAGE_STATE_SELECTING:
ct->tool_state = CAGE_STATE_WAIT;
break;
case DEFORM_STATE_MOVE_HANDLE:
pika_cage_tool_filter_update (ct);
ct->tool_state = DEFORM_STATE_WAIT;
break;
case DEFORM_STATE_SELECTING:
ct->tool_state = DEFORM_STATE_WAIT;
break;
}
pika_cage_config_reset_displacement (ct->config);
}
else
{
/* Normal release */
switch (ct->tool_state)
{
case CAGE_STATE_CLOSING:
ct->dirty_coef = TRUE;
pika_cage_config_commit_displacement (ct->config);
if (release_type == PIKA_BUTTON_RELEASE_CLICK)
g_object_set (options, "cage-mode", PIKA_CAGE_MODE_DEFORM, NULL);
break;
case CAGE_STATE_MOVE_HANDLE:
ct->dirty_coef = TRUE;
ct->tool_state = CAGE_STATE_WAIT;
pika_cage_config_commit_displacement (ct->config);
break;
case CAGE_STATE_SELECTING:
{
GeglRectangle area =
{ MIN (ct->selection_start_x, coords->x) - ct->offset_x,
MIN (ct->selection_start_y, coords->y) - ct->offset_y,
ABS (ct->selection_start_x - coords->x),
ABS (ct->selection_start_y - coords->y) };
if (state & pika_get_extend_selection_mask ())
{
pika_cage_config_select_add_area (ct->config,
PIKA_CAGE_MODE_CAGE_CHANGE,
area);
}
else
{
pika_cage_config_select_area (ct->config,
PIKA_CAGE_MODE_CAGE_CHANGE,
area);
}
ct->tool_state = CAGE_STATE_WAIT;
}
break;
case DEFORM_STATE_MOVE_HANDLE:
ct->tool_state = DEFORM_STATE_WAIT;
pika_cage_config_commit_displacement (ct->config);
gegl_node_set (ct->cage_node,
"config", ct->config,
NULL);
pika_cage_tool_filter_update (ct);
break;
case DEFORM_STATE_SELECTING:
{
GeglRectangle area =
{ MIN (ct->selection_start_x, coords->x) - ct->offset_x,
MIN (ct->selection_start_y, coords->y) - ct->offset_y,
ABS (ct->selection_start_x - coords->x),
ABS (ct->selection_start_y - coords->y) };
if (state & pika_get_extend_selection_mask ())
{
pika_cage_config_select_add_area (ct->config,
PIKA_CAGE_MODE_DEFORM, area);
}
else
{
pika_cage_config_select_area (ct->config,
PIKA_CAGE_MODE_DEFORM, area);
}
ct->tool_state = DEFORM_STATE_WAIT;
}
break;
}
}
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
}
static void
pika_cage_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
ct->cursor_x = coords->x;
ct->cursor_y = coords->y;
switch (ct->tool_state)
{
case CAGE_STATE_MOVE_HANDLE:
case CAGE_STATE_CLOSING:
case DEFORM_STATE_MOVE_HANDLE:
pika_cage_config_add_displacement (ct->config,
options->cage_mode,
ct->cursor_x - ct->movement_start_x,
ct->cursor_y - ct->movement_start_y);
break;
}
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
}
static gboolean
pika_cage_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
if (! ct->config)
return FALSE;
switch (kevent->keyval)
{
case GDK_KEY_BackSpace:
if (ct->tool_state == CAGE_STATE_WAIT)
{
if (pika_cage_config_get_n_points (ct->config) != 0)
pika_cage_tool_remove_last_handle (ct);
}
else if (ct->tool_state == DEFORM_STATE_WAIT)
{
pika_cage_config_remove_selected_points (ct->config);
/* if the cage have less than 3 handles, we reopen it */
if (pika_cage_config_get_n_points (ct->config) <= 2)
{
ct->tool_state = CAGE_STATE_WAIT;
}
pika_cage_tool_compute_coef (ct);
pika_cage_tool_render_node_update (ct);
}
return TRUE;
case GDK_KEY_Return:
case GDK_KEY_KP_Enter:
case GDK_KEY_ISO_Enter:
if (! pika_cage_tool_is_complete (ct) &&
pika_cage_config_get_n_points (ct->config) > 2)
{
g_object_set (pika_tool_get_options (tool),
"cage-mode", PIKA_CAGE_MODE_DEFORM,
NULL);
}
else if (ct->tool_state == DEFORM_STATE_WAIT)
{
pika_tool_control (tool, PIKA_TOOL_ACTION_COMMIT, display);
}
return TRUE;
case GDK_KEY_Escape:
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, display);
return TRUE;
default:
break;
}
return FALSE;
}
static void
pika_cage_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (ct->config)
{
ct->hovering_handle = pika_cage_tool_is_on_handle (ct,
draw_tool,
display,
coords->x,
coords->y,
PIKA_TOOL_HANDLE_SIZE_CIRCLE);
ct->hovering_edge = pika_cage_tool_is_on_edge (ct,
coords->x,
coords->y,
PIKA_TOOL_HANDLE_SIZE_CIRCLE);
}
pika_draw_tool_pause (draw_tool);
ct->cursor_x = coords->x;
ct->cursor_y = coords->y;
pika_draw_tool_resume (draw_tool);
}
static void
pika_cage_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
PikaGuiConfig *config = PIKA_GUI_CONFIG (display->pika->config);
PikaCursorModifier modifier = PIKA_CURSOR_MODIFIER_PLUS;
if (tool->display)
{
if (ct->hovering_handle != -1)
{
modifier = PIKA_CURSOR_MODIFIER_MOVE;
}
else if (ct->hovering_edge != -1 &&
options->cage_mode == PIKA_CAGE_MODE_CAGE_CHANGE)
{
modifier = PIKA_CURSOR_MODIFIER_PLUS;
}
else
{
if (pika_cage_tool_is_complete (ct))
modifier = PIKA_CURSOR_MODIFIER_BAD;
}
}
else
{
PikaImage *image = pika_display_get_image (display);
GList *drawables = pika_image_get_selected_drawables (image);
PikaDrawable *drawable = NULL;
if (g_list_length (drawables) == 1)
drawable = drawables->data;
g_list_free (drawables);
if (! drawable ||
pika_viewable_get_children (PIKA_VIEWABLE (drawable)) ||
pika_item_is_content_locked (PIKA_ITEM (drawable), NULL) ||
! (pika_item_is_visible (PIKA_ITEM (drawable)) ||
config->edit_non_visible))
{
modifier = PIKA_CURSOR_MODIFIER_BAD;
}
}
pika_tool_control_set_cursor_modifier (tool->control, modifier);
PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static void
pika_cage_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (tool);
PIKA_TOOL_CLASS (parent_class)->options_notify (tool, options, pspec);
if (! tool->display)
return;
pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
if (strcmp (pspec->name, "cage-mode") == 0)
{
PikaCageMode mode;
g_object_get (options,
"cage-mode", &mode,
NULL);
if (mode == PIKA_CAGE_MODE_DEFORM)
{
/* switch to deform mode */
if (pika_cage_config_get_n_points (ct->config) > 2)
{
pika_cage_config_reset_displacement (ct->config);
pika_cage_config_reverse_cage_if_needed (ct->config);
pika_tool_push_status (tool, tool->display,
_("Press ENTER to commit the transform"));
ct->tool_state = DEFORM_STATE_WAIT;
if (! ct->render_node)
{
pika_cage_tool_create_render_node (ct);
}
if (ct->dirty_coef)
{
pika_cage_tool_compute_coef (ct);
pika_cage_tool_render_node_update (ct);
}
if (! ct->filter)
pika_cage_tool_create_filter (ct);
pika_cage_tool_filter_update (ct);
}
else
{
g_object_set (options,
"cage-mode", PIKA_CAGE_MODE_CAGE_CHANGE,
NULL);
}
}
else
{
/* switch to edit mode */
if (ct->filter)
{
pika_drawable_filter_abort (ct->filter);
pika_tool_pop_status (tool, tool->display);
ct->tool_state = CAGE_STATE_WAIT;
}
}
}
else if (strcmp (pspec->name, "fill-plain-color") == 0)
{
if (ct->tool_state == DEFORM_STATE_WAIT)
{
pika_cage_tool_render_node_update (ct);
pika_cage_tool_filter_update (ct);
}
}
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
}
static void
pika_cage_tool_draw (PikaDrawTool *draw_tool)
{
PikaCageTool *ct = PIKA_CAGE_TOOL (draw_tool);
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
PikaCageConfig *config = ct->config;
PikaCanvasGroup *stroke_group;
gint n_vertices;
gint i;
PikaHandleType handle;
n_vertices = pika_cage_config_get_n_points (config);
if (n_vertices == 0)
return;
if (ct->tool_state == CAGE_STATE_INIT)
return;
stroke_group = pika_draw_tool_add_stroke_group (draw_tool);
pika_draw_tool_push_group (draw_tool, stroke_group);
/* If needed, draw line to the cursor. */
if (! pika_cage_tool_is_complete (ct))
{
PikaVector2 last_point;
last_point = pika_cage_config_get_point_coordinate (ct->config,
options->cage_mode,
n_vertices - 1);
pika_draw_tool_add_line (draw_tool,
last_point.x + ct->offset_x,
last_point.y + ct->offset_y,
ct->cursor_x,
ct->cursor_y);
}
pika_draw_tool_pop_group (draw_tool);
/* Draw the cage with handles. */
for (i = 0; i < n_vertices; i++)
{
PikaCanvasItem *item;
PikaVector2 point1, point2;
point1 = pika_cage_config_get_point_coordinate (ct->config,
options->cage_mode,
i);
point1.x += ct->offset_x;
point1.y += ct->offset_y;
if (i > 0 || pika_cage_tool_is_complete (ct))
{
gint index_point2;
if (i == 0)
index_point2 = n_vertices - 1;
else
index_point2 = i - 1;
point2 = pika_cage_config_get_point_coordinate (ct->config,
options->cage_mode,
index_point2);
point2.x += ct->offset_x;
point2.y += ct->offset_y;
if (i != ct->hovering_edge ||
pika_cage_tool_is_complete (ct))
{
pika_draw_tool_push_group (draw_tool, stroke_group);
}
item = pika_draw_tool_add_line (draw_tool,
point1.x,
point1.y,
point2.x,
point2.y);
if (i == ct->hovering_edge &&
! pika_cage_tool_is_complete (ct))
{
pika_canvas_item_set_highlight (item, TRUE);
}
else
{
pika_draw_tool_pop_group (draw_tool);
}
}
if (pika_cage_config_point_is_selected (ct->config, i))
{
if (i == ct->hovering_handle)
handle = PIKA_HANDLE_FILLED_SQUARE;
else
handle = PIKA_HANDLE_SQUARE;
}
else
{
if (i == ct->hovering_handle)
handle = PIKA_HANDLE_FILLED_CIRCLE;
else
handle = PIKA_HANDLE_CIRCLE;
}
item = pika_draw_tool_add_handle (draw_tool,
handle,
point1.x,
point1.y,
PIKA_TOOL_HANDLE_SIZE_CIRCLE,
PIKA_TOOL_HANDLE_SIZE_CIRCLE,
PIKA_HANDLE_ANCHOR_CENTER);
if (i == ct->hovering_handle)
pika_canvas_item_set_highlight (item, TRUE);
}
if (ct->tool_state == DEFORM_STATE_SELECTING ||
ct->tool_state == CAGE_STATE_SELECTING)
{
pika_draw_tool_add_rectangle (draw_tool,
FALSE,
MIN (ct->selection_start_x, ct->cursor_x),
MIN (ct->selection_start_y, ct->cursor_y),
ABS (ct->selection_start_x - ct->cursor_x),
ABS (ct->selection_start_y - ct->cursor_y));
}
}
static void
pika_cage_tool_start (PikaCageTool *ct,
PikaDisplay *display)
{
PikaTool *tool = PIKA_TOOL (ct);
PikaImage *image = pika_display_get_image (display);
GList *drawables = pika_image_get_selected_drawables (image);
g_return_if_fail (g_list_length (drawables) == 1);
tool->display = display;
g_list_free (tool->drawables);
tool->drawables = drawables;
g_clear_object (&ct->config);
g_clear_object (&ct->coef);
ct->dirty_coef = TRUE;
if (ct->filter)
{
pika_drawable_filter_abort (ct->filter);
g_clear_object (&ct->filter);
}
if (ct->render_node)
{
g_clear_object (&ct->render_node);
ct->coef_node = NULL;
ct->cage_node = NULL;
}
ct->config = g_object_new (PIKA_TYPE_CAGE_CONFIG, NULL);
ct->hovering_handle = -1;
ct->hovering_edge = -1;
ct->tool_state = CAGE_STATE_INIT;
/* Setting up cage offset to convert the cage point coords to
* drawable coords
*/
pika_item_get_offset (PIKA_ITEM (tool->drawables->data),
&ct->offset_x, &ct->offset_y);
pika_draw_tool_start (PIKA_DRAW_TOOL (ct), display);
}
static void
pika_cage_tool_halt (PikaCageTool *ct)
{
PikaTool *tool = PIKA_TOOL (ct);
g_clear_object (&ct->config);
g_clear_object (&ct->coef);
g_clear_object (&ct->render_node);
ct->coef_node = NULL;
ct->cage_node = NULL;
if (ct->filter)
{
pika_tool_control_push_preserve (tool->control, TRUE);
pika_drawable_filter_abort (ct->filter);
g_clear_object (&ct->filter);
pika_tool_control_pop_preserve (tool->control);
pika_image_flush (pika_display_get_image (tool->display));
}
tool->display = NULL;
g_list_free (tool->drawables);
tool->drawables = NULL;
ct->tool_state = CAGE_STATE_INIT;
g_object_set (pika_tool_get_options (tool),
"cage-mode", PIKA_CAGE_MODE_CAGE_CHANGE,
NULL);
}
static void
pika_cage_tool_commit (PikaCageTool *ct)
{
if (ct->filter)
{
PikaTool *tool = PIKA_TOOL (ct);
pika_tool_control_push_preserve (tool->control, TRUE);
pika_drawable_filter_commit (ct->filter, PIKA_PROGRESS (tool), FALSE);
g_clear_object (&ct->filter);
pika_tool_control_pop_preserve (tool->control);
pika_image_flush (pika_display_get_image (tool->display));
}
}
static gint
pika_cage_tool_is_on_handle (PikaCageTool *ct,
PikaDrawTool *draw_tool,
PikaDisplay *display,
gdouble x,
gdouble y,
gint handle_size)
{
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
PikaCageConfig *config = ct->config;
gdouble dist = G_MAXDOUBLE;
gint i;
PikaVector2 cage_point;
guint n_cage_vertices;
g_return_val_if_fail (PIKA_IS_CAGE_TOOL (ct), -1);
n_cage_vertices = pika_cage_config_get_n_points (config);
if (n_cage_vertices == 0)
return -1;
for (i = 0; i < n_cage_vertices; i++)
{
cage_point = pika_cage_config_get_point_coordinate (config,
options->cage_mode,
i);
cage_point.x += ct->offset_x;
cage_point.y += ct->offset_y;
dist = pika_draw_tool_calc_distance_square (PIKA_DRAW_TOOL (draw_tool),
display,
x, y,
cage_point.x,
cage_point.y);
if (dist <= SQR (handle_size / 2))
return i;
}
return -1;
}
static gint
pika_cage_tool_is_on_edge (PikaCageTool *ct,
gdouble x,
gdouble y,
gint handle_size)
{
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
PikaCageConfig *config = ct->config;
gint i;
guint n_cage_vertices;
PikaVector2 A, B, C, AB, BC, AC;
gdouble lAB, lBC, lAC, lEB, lEC;
g_return_val_if_fail (PIKA_IS_CAGE_TOOL (ct), -1);
n_cage_vertices = pika_cage_config_get_n_points (config);
if (n_cage_vertices < 2)
return -1;
A = pika_cage_config_get_point_coordinate (config,
options->cage_mode,
n_cage_vertices-1);
B = pika_cage_config_get_point_coordinate (config,
options->cage_mode,
0);
C.x = x;
C.y = y;
for (i = 0; i < n_cage_vertices; i++)
{
pika_vector2_sub (&AB, &A, &B);
pika_vector2_sub (&BC, &B, &C);
pika_vector2_sub (&AC, &A, &C);
lAB = pika_vector2_length (&AB);
lBC = pika_vector2_length (&BC);
lAC = pika_vector2_length (&AC);
lEB = lAB / 2 + (SQR (lBC) - SQR (lAC)) / (2 * lAB);
lEC = sqrt (SQR (lBC) - SQR (lEB));
if ((lEC < handle_size / 2) && (ABS (SQR (lBC) - SQR (lAC)) <= SQR (lAB)))
return i;
A = B;
B = pika_cage_config_get_point_coordinate (config,
options->cage_mode,
(i+1) % n_cage_vertices);
}
return -1;
}
static gboolean
pika_cage_tool_is_complete (PikaCageTool *ct)
{
return (ct->tool_state > CAGE_STATE_CLOSING);
}
static void
pika_cage_tool_remove_last_handle (PikaCageTool *ct)
{
PikaCageConfig *config = ct->config;
pika_draw_tool_pause (PIKA_DRAW_TOOL (ct));
pika_cage_config_remove_last_cage_point (config);
pika_draw_tool_resume (PIKA_DRAW_TOOL (ct));
}
static void
pika_cage_tool_compute_coef (PikaCageTool *ct)
{
PikaCageConfig *config = ct->config;
PikaProgress *progress;
const Babl *format;
GeglNode *gegl;
GeglNode *input;
GeglNode *output;
GeglProcessor *processor;
GeglBuffer *buffer;
gdouble value;
progress = pika_progress_start (PIKA_PROGRESS (ct), FALSE,
_("Computing Cage Coefficients"));
g_clear_object (&ct->coef);
format = babl_format_n (babl_type ("float"),
pika_cage_config_get_n_points (config) * 2);
gegl = gegl_node_new ();
input = gegl_node_new_child (gegl,
"operation", "pika:cage-coef-calc",
"config", ct->config,
NULL);
output = gegl_node_new_child (gegl,
"operation", "gegl:buffer-sink",
"buffer", &buffer,
"format", format,
NULL);
gegl_node_link (input, output);
processor = gegl_node_new_processor (output, NULL);
while (gegl_processor_work (processor, &value))
{
if (progress)
pika_progress_set_value (progress, value);
}
if (progress)
pika_progress_end (progress);
g_object_unref (processor);
ct->coef = buffer;
g_object_unref (gegl);
ct->dirty_coef = FALSE;
}
static void
pika_cage_tool_create_render_node (PikaCageTool *ct)
{
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
GeglNode *render;
GeglNode *input;
GeglNode *output;
g_return_if_fail (ct->render_node == NULL);
/* render_node is not supposed to be recreated */
ct->render_node = gegl_node_new ();
input = gegl_node_get_input_proxy (ct->render_node, "input");
output = gegl_node_get_output_proxy (ct->render_node, "output");
ct->coef_node = gegl_node_new_child (ct->render_node,
"operation", "gegl:buffer-source",
"buffer", ct->coef,
NULL);
ct->cage_node = gegl_node_new_child (ct->render_node,
"operation", "pika:cage-transform",
"config", ct->config,
"fill-plain-color", options->fill_plain_color,
NULL);
render = gegl_node_new_child (ct->render_node,
"operation", "gegl:map-absolute",
NULL);
gegl_node_link (input, ct->cage_node);
gegl_node_connect (ct->coef_node, "output",
ct->cage_node, "aux");
gegl_node_link (input, render);
gegl_node_connect (ct->cage_node, "output",
render, "aux");
gegl_node_link (render, output);
pika_gegl_progress_connect (ct->cage_node, PIKA_PROGRESS (ct),
_("Cage Transform"));
}
static void
pika_cage_tool_render_node_update (PikaCageTool *ct)
{
PikaCageOptions *options = PIKA_CAGE_TOOL_GET_OPTIONS (ct);
gboolean fill;
GeglBuffer *buffer;
gegl_node_get (ct->cage_node,
"fill-plain-color", &fill,
NULL);
if (fill != options->fill_plain_color)
{
gegl_node_set (ct->cage_node,
"fill-plain-color", options->fill_plain_color,
NULL);
}
gegl_node_get (ct->coef_node,
"buffer", &buffer,
NULL);
if (buffer != ct->coef)
{
gegl_node_set (ct->coef_node,
"buffer", ct->coef,
NULL);
}
if (buffer)
g_object_unref (buffer);
}
static void
pika_cage_tool_create_filter (PikaCageTool *ct)
{
if (! ct->render_node)
pika_cage_tool_create_render_node (ct);
ct->filter = pika_drawable_filter_new (PIKA_TOOL (ct)->drawables->data,
_("Cage transform"),
ct->render_node,
PIKA_ICON_TOOL_CAGE);
pika_drawable_filter_set_region (ct->filter, PIKA_FILTER_REGION_DRAWABLE);
g_signal_connect (ct->filter, "flush",
G_CALLBACK (pika_cage_tool_filter_flush),
ct);
}
static void
pika_cage_tool_filter_flush (PikaDrawableFilter *filter,
PikaTool *tool)
{
PikaImage *image = pika_display_get_image (tool->display);
pika_projection_flush (pika_image_get_projection (image));
}
static void
pika_cage_tool_filter_update (PikaCageTool *ct)
{
pika_drawable_filter_apply (ct->filter, NULL);
}
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