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gimp/app/tools/gimpwarptool.c

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/* GIMP - The GNU Image Manipulation Program
*
* gimpwarptool.c
* Copyright (C) 2011 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include "gegl-utils.h"
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "gegl/gimp-gegl-apply-operation.h"
#include "core/gimp.h"
#include "core/gimpchannel.h"
#include "core/gimpimage.h"
#include "core/gimpimagemap.h"
#include "core/gimplayer.h"
#include "core/gimpprogress.h"
#include "core/gimpprojection.h"
#include "core/gimpsubprogress.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpdisplay.h"
#include "gimpwarptool.h"
#include "gimpwarpoptions.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
#define STROKE_PERIOD 100
static void gimp_warp_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static void gimp_warp_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_warp_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_warp_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static gboolean gimp_warp_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display);
static void gimp_warp_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_warp_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
const gchar * gimp_warp_tool_get_undo_desc (GimpTool *tool,
GimpDisplay *display);
const gchar * gimp_warp_tool_get_redo_desc (GimpTool *tool,
GimpDisplay *display);
static gboolean gimp_warp_tool_undo (GimpTool *tool,
GimpDisplay *display);
static gboolean gimp_warp_tool_redo (GimpTool *tool,
GimpDisplay *display);
static void gimp_warp_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec);
static void gimp_warp_tool_draw (GimpDrawTool *draw_tool);
static void gimp_warp_tool_start (GimpWarpTool *wt,
GimpDisplay *display);
static void gimp_warp_tool_halt (GimpWarpTool *wt);
static void gimp_warp_tool_commit (GimpWarpTool *wt);
static gboolean gimp_warp_tool_stroke_timer (GimpWarpTool *wt);
static void gimp_warp_tool_create_graph (GimpWarpTool *wt);
static void gimp_warp_tool_create_image_map (GimpWarpTool *wt,
GimpDrawable *drawable);
static void gimp_warp_tool_update_stroke (GimpWarpTool *wt,
GeglNode *node);
static void gimp_warp_tool_stroke_changed (GeglPath *stroke,
const GeglRectangle *roi,
GimpWarpTool *wt);
static void gimp_warp_tool_image_map_flush (GimpImageMap *image_map,
GimpTool *tool);
static void gimp_warp_tool_add_op (GimpWarpTool *wt,
GeglNode *op);
static void gimp_warp_tool_remove_op (GimpWarpTool *wt,
GeglNode *op);
static void gimp_warp_tool_animate (GimpWarpTool *wt);
G_DEFINE_TYPE (GimpWarpTool, gimp_warp_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_warp_tool_parent_class
void
gimp_warp_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_WARP_TOOL,
GIMP_TYPE_WARP_OPTIONS,
gimp_warp_options_gui,
0,
"gimp-warp-tool",
_("Warp Transform"),
_("Warp Transform: Deform with different tools"),
N_("_Warp Transform"), "W",
NULL, GIMP_HELP_TOOL_WARP,
GIMP_STOCK_TOOL_WARP,
data);
}
static void
gimp_warp_tool_class_init (GimpWarpToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
tool_class->control = gimp_warp_tool_control;
tool_class->button_press = gimp_warp_tool_button_press;
tool_class->button_release = gimp_warp_tool_button_release;
tool_class->motion = gimp_warp_tool_motion;
tool_class->key_press = gimp_warp_tool_key_press;
tool_class->oper_update = gimp_warp_tool_oper_update;
tool_class->cursor_update = gimp_warp_tool_cursor_update;
tool_class->get_undo_desc = gimp_warp_tool_get_undo_desc;
tool_class->get_redo_desc = gimp_warp_tool_get_redo_desc;
tool_class->undo = gimp_warp_tool_undo;
tool_class->redo = gimp_warp_tool_redo;
tool_class->options_notify = gimp_warp_tool_options_notify;
draw_tool_class->draw = gimp_warp_tool_draw;
}
static void
gimp_warp_tool_init (GimpWarpTool *self)
{
GimpTool *tool = GIMP_TOOL (self);
gimp_tool_control_set_preserve (tool->control, FALSE);
gimp_tool_control_set_motion_mode (tool->control, GIMP_MOTION_MODE_EXACT);
gimp_tool_control_set_dirty_mask (tool->control,
GIMP_DIRTY_IMAGE |
GIMP_DIRTY_DRAWABLE |
GIMP_DIRTY_SELECTION |
GIMP_DIRTY_ACTIVE_DRAWABLE);
gimp_tool_control_set_wants_click (tool->control, TRUE);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_PERSPECTIVE);
gimp_tool_control_set_action_size (tool->control,
"tools/tools-warp-effect-size-set");
}
static void
gimp_warp_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
case GIMP_TOOL_ACTION_RESUME:
break;
case GIMP_TOOL_ACTION_HALT:
gimp_warp_tool_halt (wt);
break;
case GIMP_TOOL_ACTION_COMMIT:
gimp_warp_tool_commit (wt);
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
gimp_warp_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
GimpWarpOptions *options = GIMP_WARP_TOOL_GET_OPTIONS (wt);
GeglNode *new_op;
gint off_x, off_y;
if (tool->display && display != tool->display)
{
gimp_tool_pop_status (tool, tool->display);
gimp_warp_tool_halt (wt);
}
if (! tool->display)
gimp_warp_tool_start (wt, display);
wt->current_stroke = gegl_path_new ();
new_op = gegl_node_new_child (NULL,
"operation", "gegl:warp",
"behavior", options->behavior,
"strength", options->effect_strength,
"size", options->effect_size,
"hardness", options->effect_hardness,
"stroke", wt->current_stroke,
NULL);
gimp_warp_tool_add_op (wt, new_op);
g_object_unref (new_op);
g_signal_connect (wt->current_stroke, "changed",
G_CALLBACK (gimp_warp_tool_stroke_changed),
wt);
gimp_item_get_offset (GIMP_ITEM (tool->drawable), &off_x, &off_y);
gegl_path_append (wt->current_stroke,
'M', coords->x - off_x, coords->y - off_y);
wt->stroke_timer = g_timeout_add (STROKE_PERIOD,
(GSourceFunc) gimp_warp_tool_stroke_timer,
wt);
gimp_tool_control_activate (tool->control);
}
void
gimp_warp_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (wt));
gimp_tool_control_halt (tool->control);
g_source_remove (wt->stroke_timer);
wt->stroke_timer = 0;
g_signal_handlers_disconnect_by_func (wt->current_stroke,
gimp_warp_tool_stroke_changed,
wt);
#ifdef WARP_DEBUG
g_printerr ("%s\n", gegl_path_to_string (wt->current_stroke));
#endif
g_object_unref (wt->current_stroke);
wt->current_stroke = NULL;
if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
{
gimp_warp_tool_undo (tool, display);
/* the just undone stroke has no business on the redo stack */
g_object_unref (wt->redo_stack->data);
wt->redo_stack = g_list_remove_link (wt->redo_stack, wt->redo_stack);
}
else
{
if (wt->redo_stack)
{
/* the redo stack becomes invalid by actually doing a stroke */
g_list_free_full (wt->redo_stack, (GDestroyNotify) g_object_unref);
wt->redo_stack = NULL;
}
gimp_tool_push_status (tool, tool->display,
_("Press ENTER to commit the transform"));
}
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
/* update the undo actions / menu items */
gimp_image_flush (gimp_display_get_image (GIMP_TOOL (wt)->display));
}
static void
gimp_warp_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
wt->cursor_x = coords->x;
wt->cursor_y = coords->y;
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
static gboolean
gimp_warp_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
switch (kevent->keyval)
{
case GDK_KEY_BackSpace:
return TRUE;
case GDK_KEY_Return:
case GDK_KEY_KP_Enter:
case GDK_KEY_ISO_Enter:
gimp_tool_control (tool, GIMP_TOOL_ACTION_COMMIT, display);
/* fall thru */
case GDK_KEY_Escape:
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
return TRUE;
default:
break;
}
return FALSE;
}
static void
gimp_warp_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
if (proximity)
{
gimp_draw_tool_pause (draw_tool);
if (! tool->display || display == tool->display)
{
wt->cursor_x = coords->x;
wt->cursor_y = coords->y;
}
if (! gimp_draw_tool_is_active (draw_tool))
gimp_draw_tool_start (draw_tool, display);
gimp_draw_tool_resume (draw_tool);
}
else if (gimp_draw_tool_is_active (draw_tool))
{
gimp_draw_tool_stop (draw_tool);
}
}
static void
gimp_warp_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpWarpOptions *options = GIMP_WARP_TOOL_GET_OPTIONS (tool);
GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_PLUS;
if (tool->display)
{
/* FIXME have better cursors */
switch (options->behavior)
{
case GIMP_WARP_BEHAVIOR_MOVE:
case GEGL_WARP_BEHAVIOR_GROW:
case GEGL_WARP_BEHAVIOR_SHRINK:
case GEGL_WARP_BEHAVIOR_SWIRL_CW:
case GEGL_WARP_BEHAVIOR_SWIRL_CCW:
case GEGL_WARP_BEHAVIOR_ERASE:
case GEGL_WARP_BEHAVIOR_SMOOTH:
modifier = GIMP_CURSOR_MODIFIER_MOVE;
break;
}
}
gimp_tool_control_set_cursor_modifier (tool->control, modifier);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
const gchar *
gimp_warp_tool_get_undo_desc (GimpTool *tool,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
GeglNode *to_delete;
const gchar *type;
if (! wt->render_node)
return NULL;
to_delete = gegl_node_get_producer (wt->render_node, "aux", NULL);
type = gegl_node_get_operation (to_delete);
if (strcmp (type, "gegl:warp"))
return NULL;
return _("Warp Tool Stroke");
}
const gchar *
gimp_warp_tool_get_redo_desc (GimpTool *tool,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
if (! wt->render_node || ! wt->redo_stack)
return NULL;
return _("Warp Tool Stroke");
}
static gboolean
gimp_warp_tool_undo (GimpTool *tool,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
GeglNode *to_delete;
const gchar *type;
if (! wt->render_node)
return FALSE;
to_delete = gegl_node_get_producer (wt->render_node, "aux", NULL);
type = gegl_node_get_operation (to_delete);
if (strcmp (type, "gegl:warp"))
return FALSE;
wt->redo_stack = g_list_prepend (wt->redo_stack, g_object_ref (to_delete));
gimp_warp_tool_remove_op (wt, to_delete);
gegl_node_remove_child (wt->graph, to_delete);
gimp_warp_tool_update_stroke (wt, to_delete);
return TRUE;
}
static gboolean
gimp_warp_tool_redo (GimpTool *tool,
GimpDisplay *display)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (tool);
GeglNode *to_add;
if (! wt->render_node || ! wt->redo_stack)
return FALSE;
to_add = wt->redo_stack->data;
gimp_warp_tool_add_op (wt, to_add);
g_object_unref (to_add);
wt->redo_stack = g_list_remove_link (wt->redo_stack, wt->redo_stack);
gimp_warp_tool_update_stroke (wt, to_add);
return TRUE;
}
static void
gimp_warp_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec)
{
GIMP_TOOL_CLASS (parent_class)->options_notify (tool, options, pspec);
if (! strcmp (pspec->name, "effect-size"))
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
}
static void
gimp_warp_tool_draw (GimpDrawTool *draw_tool)
{
GimpWarpTool *wt = GIMP_WARP_TOOL (draw_tool);
GimpWarpOptions *options = GIMP_WARP_TOOL_GET_OPTIONS (wt);
gimp_draw_tool_add_arc (draw_tool,
FALSE,
wt->cursor_x - options->effect_size * 0.5,
wt->cursor_y - options->effect_size * 0.5,
options->effect_size,
options->effect_size,
0.0, 2.0 * G_PI);
}
static void
gimp_warp_tool_start (GimpWarpTool *wt,
GimpDisplay *display)
{
GimpTool *tool = GIMP_TOOL (wt);
GimpWarpOptions *options = GIMP_WARP_TOOL_GET_OPTIONS (wt);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
const Babl *format;
GeglRectangle bbox;
tool->display = display;
tool->drawable = drawable;
/* Create the coords buffer, with the size of the selection */
format = babl_format_n (babl_type ("float"), 2);
gimp_item_mask_intersect (GIMP_ITEM (drawable), &bbox.x, &bbox.y,
&bbox.width, &bbox.height);
#ifdef WARP_DEBUG
g_printerr ("Initialize coordinate buffer (%d,%d) at %d,%d\n",
bbox.width, bbox.height, bbox.x, bbox.y);
#endif
wt->coords_buffer = gegl_buffer_new (&bbox, format);
gimp_warp_tool_create_image_map (wt, drawable);
if (! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (wt)))
gimp_draw_tool_start (GIMP_DRAW_TOOL (wt), display);
if (options->animate_button)
{
g_signal_connect_swapped (options->animate_button, "clicked",
G_CALLBACK (gimp_warp_tool_animate),
wt);
gtk_widget_set_sensitive (options->animate_button, TRUE);
}
}
static void
gimp_warp_tool_halt (GimpWarpTool *wt)
{
GimpTool *tool = GIMP_TOOL (wt);
GimpWarpOptions *options = GIMP_WARP_TOOL_GET_OPTIONS (wt);
if (wt->coords_buffer)
{
g_object_unref (wt->coords_buffer);
wt->coords_buffer = NULL;
}
if (wt->graph)
{
g_object_unref (wt->graph);
wt->graph = NULL;
wt->render_node = NULL;
}
if (wt->image_map)
{
gimp_image_map_abort (wt->image_map);
g_object_unref (wt->image_map);
wt->image_map = NULL;
gimp_image_flush (gimp_display_get_image (tool->display));
}
if (wt->redo_stack)
{
g_list_free_full (wt->redo_stack, (GDestroyNotify) g_object_unref);
wt->redo_stack = NULL;
}
tool->display = NULL;
tool->drawable = NULL;
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (wt)))
gimp_draw_tool_stop (GIMP_DRAW_TOOL (wt));
if (options->animate_button)
{
gtk_widget_set_sensitive (options->animate_button, FALSE);
g_signal_handlers_disconnect_by_func (options->animate_button,
gimp_warp_tool_animate,
wt);
}
}
static void
gimp_warp_tool_commit (GimpWarpTool *wt)
{
GimpTool *tool = GIMP_TOOL (wt);
if (wt->image_map)
{
gimp_tool_control_push_preserve (tool->control, TRUE);
gimp_image_map_commit (wt->image_map, GIMP_PROGRESS (tool), FALSE);
g_object_unref (wt->image_map);
wt->image_map = NULL;
gimp_tool_control_pop_preserve (tool->control);
gimp_image_flush (gimp_display_get_image (tool->display));
}
}
static gboolean
gimp_warp_tool_stroke_timer (GimpWarpTool *wt)
{
GimpTool *tool = GIMP_TOOL (wt);
gint off_x, off_y;
gimp_item_get_offset (GIMP_ITEM (tool->drawable), &off_x, &off_y);
gegl_path_append (wt->current_stroke,
'L', wt->cursor_x - off_x, wt->cursor_y - off_y);
return TRUE;
}
static void
gimp_warp_tool_create_graph (GimpWarpTool *wt)
{
GeglNode *graph; /* Wraper to be returned */
GeglNode *input, *output; /* Proxy nodes */
GeglNode *coords, *render; /* Render nodes */
/* render_node is not supposed to be recreated */
g_return_if_fail (wt->graph == NULL);
graph = gegl_node_new ();
input = gegl_node_get_input_proxy (graph, "input");
output = gegl_node_get_output_proxy (graph, "output");
coords = gegl_node_new_child (graph,
"operation", "gegl:buffer-source",
"buffer", wt->coords_buffer,
NULL);
render = gegl_node_new_child (graph,
"operation", "gegl:map-relative",
NULL);
gegl_node_connect_to (input, "output",
render, "input");
gegl_node_connect_to (coords, "output",
render, "aux");
gegl_node_connect_to (render, "output",
output, "input");
wt->graph = graph;
wt->render_node = render;
}
static void
gimp_warp_tool_create_image_map (GimpWarpTool *wt,
GimpDrawable *drawable)
{
if (! wt->graph)
gimp_warp_tool_create_graph (wt);
wt->image_map = gimp_image_map_new (drawable,
_("Warp transform"),
wt->graph,
GIMP_STOCK_TOOL_WARP);
gimp_image_map_set_region (wt->image_map, GIMP_IMAGE_MAP_REGION_DRAWABLE);
#if 0
g_object_set (wt->image_map, "gegl-caching", TRUE, NULL);
#endif
g_signal_connect (wt->image_map, "flush",
G_CALLBACK (gimp_warp_tool_image_map_flush),
wt);
}
static void
gimp_warp_tool_update_stroke (GimpWarpTool *wt,
GeglNode *node)
{
GeglPath *stroke;
gdouble size;
gegl_node_get (node,
"stroke", &stroke,
"size", &size,
NULL);
if (stroke)
{
gdouble min_x;
gdouble max_x;
gdouble min_y;
gdouble max_y;
GeglRectangle bbox;
gegl_path_get_bounds (stroke, &min_x, &max_x, &min_y, &max_y);
g_object_unref (stroke);
bbox.x = min_x - size * 0.5;
bbox.y = min_y - size * 0.5;
bbox.width = max_x - min_x + size;
bbox.height = max_y - min_y + size;
#ifdef WARP_DEBUG
g_printerr ("update stroke: (%d,%d), %dx%d\n",
bbox.x, bbox.y,
bbox.width, bbox.height);
#endif
gimp_image_map_apply (wt->image_map, &bbox);
}
}
static void
gimp_warp_tool_stroke_changed (GeglPath *path,
const GeglRectangle *roi,
GimpWarpTool *wt)
{
GimpWarpOptions *options = GIMP_WARP_TOOL_GET_OPTIONS (wt);
GeglRectangle update_region = *roi;
update_region.x -= options->effect_size * 0.5;
update_region.y -= options->effect_size * 0.5;
update_region.width += options->effect_size;
update_region.height += options->effect_size;
#ifdef WARP_DEBUG
g_printerr ("update rect: (%d,%d), %dx%d\n",
update_region.x, update_region.y,
update_region.width, update_region.height);
#endif
gimp_image_map_apply (wt->image_map, &update_region);
}
static void
gimp_warp_tool_image_map_flush (GimpImageMap *image_map,
GimpTool *tool)
{
GimpImage *image = gimp_display_get_image (tool->display);
gimp_projection_flush (gimp_image_get_projection (image));
}
static void
gimp_warp_tool_add_op (GimpWarpTool *wt,
GeglNode *op)
{
GeglNode *last_op;
g_return_if_fail (GEGL_IS_NODE (wt->render_node));
gegl_node_add_child (wt->graph, op);
last_op = gegl_node_get_producer (wt->render_node, "aux", NULL);
gegl_node_disconnect (wt->render_node, "aux");
gegl_node_connect_to (last_op, "output",
op , "input");
gegl_node_connect_to (op, "output",
wt->render_node, "aux");
}
static void
gimp_warp_tool_remove_op (GimpWarpTool *wt,
GeglNode *op)
{
GeglNode *previous;
g_return_if_fail (GEGL_IS_NODE (wt->render_node));
previous = gegl_node_get_producer (op, "input", NULL);
gegl_node_disconnect (op, "input");
gegl_node_connect_to (previous, "output",
wt->render_node, "aux");
gegl_node_remove_child (wt->graph, op);
}
static void
gimp_warp_tool_animate (GimpWarpTool *wt)
{
GimpTool *tool = GIMP_TOOL (wt);
GimpWarpOptions *options = GIMP_WARP_TOOL_GET_OPTIONS (wt);
GimpImage *orig_image;
GimpImage *image;
GimpLayer *layer;
GimpLayer *first_layer;
GeglNode *scale_node;
GimpProgress *progress;
GtkWidget *widget;
gint i;
if (! gimp_warp_tool_get_undo_desc (tool, tool->display))
{
gimp_tool_message_literal (tool, tool->display,
_("Please add some warp strokes first."));
return;
}
/* get rid of the image map so we can use wt->graph */
if (wt->image_map)
{
gimp_image_map_abort (wt->image_map);
g_object_unref (wt->image_map);
wt->image_map = NULL;
}
gimp_progress_start (GIMP_PROGRESS (tool), FALSE,
_("Rendering Frame %d"), 1);
orig_image = gimp_item_get_image (GIMP_ITEM (tool->drawable));
image = gimp_create_image (orig_image->gimp,
gimp_item_get_width (GIMP_ITEM (tool->drawable)),
gimp_item_get_height (GIMP_ITEM (tool->drawable)),
gimp_drawable_get_base_type (tool->drawable),
gimp_drawable_get_precision (tool->drawable),
TRUE);
/* the first frame is always the unwarped image */
layer = GIMP_LAYER (gimp_item_convert (GIMP_ITEM (tool->drawable), image,
GIMP_TYPE_LAYER));
gimp_object_take_name (GIMP_OBJECT (layer),
g_strdup_printf (_("Frame %d"), 1));
gimp_item_set_offset (GIMP_ITEM (layer), 0, 0);
gimp_item_set_visible (GIMP_ITEM (layer), TRUE, FALSE);
gimp_layer_set_mode (layer, GIMP_NORMAL_MODE, FALSE);
gimp_layer_set_opacity (layer, GIMP_OPACITY_OPAQUE, FALSE);
gimp_image_add_layer (image, layer, NULL, 0, FALSE);
first_layer = layer;
scale_node = gegl_node_new_child (NULL,
"operation", "gimp:scalar-multiply",
"n-components", 2,
NULL);
gimp_warp_tool_add_op (wt, scale_node);
progress = gimp_sub_progress_new (GIMP_PROGRESS (tool));
for (i = 1; i < options->n_animation_frames; i++)
{
gimp_progress_set_text (GIMP_PROGRESS (tool),
_("Rendering Frame %d"), i + 1);
gimp_sub_progress_set_step (GIMP_SUB_PROGRESS (progress),
i, options->n_animation_frames);
layer = GIMP_LAYER (gimp_item_duplicate (GIMP_ITEM (first_layer),
GIMP_TYPE_LAYER));
gimp_object_take_name (GIMP_OBJECT (layer),
g_strdup_printf (_("Frame %d"), i + 1));
gegl_node_set (scale_node,
"factor", (gdouble) i /
(gdouble) (options->n_animation_frames - 1),
NULL);
gimp_gegl_apply_operation (gimp_drawable_get_buffer (GIMP_DRAWABLE (first_layer)),
progress,
_("Frame"),
wt->graph,
gimp_drawable_get_buffer (GIMP_DRAWABLE (layer)),
NULL);
gimp_image_add_layer (image, layer, NULL, 0, FALSE);
}
g_object_unref (progress);
gimp_warp_tool_remove_op (wt, scale_node);
gimp_progress_end (GIMP_PROGRESS (tool));
/* recreate the image map */
gimp_warp_tool_create_image_map (wt, tool->drawable);
gimp_image_map_apply (wt->image_map, NULL);
widget = GTK_WIDGET (gimp_display_get_shell (tool->display));
gimp_create_display (orig_image->gimp, image, GIMP_UNIT_PIXEL, 1.0,
G_OBJECT (gtk_widget_get_screen (widget)),
gimp_widget_get_monitor (widget));
g_object_unref (image);
}
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