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PIKApp/app/tools/pikagradienttool.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):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Major improvements for interactivity
* Copyright (C) 2014 Michael Henning <drawoc@darkrefraction.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 <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "config/pikaguiconfig.h"
#include "gegl/pika-gegl-utils.h"
#include "operations/pika-operation-config.h"
#include "operations/layer-modes/pika-layer-modes.h"
#include "core/pika.h"
#include "core/pikadrawable.h"
#include "core/pikadrawable-gradient.h"
#include "core/pikadrawablefilter.h"
#include "core/pikaerror.h"
#include "core/pikagradient.h"
#include "core/pikaimage.h"
#include "core/pikaprogress.h"
#include "core/pikaprojection.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikawidgets-utils.h"
#include "display/pikadisplay.h"
#include "display/pikatoolline.h"
#include "pikagradientoptions.h"
#include "pikagradienttool.h"
#include "pikagradienttool-editor.h"
#include "pikatoolcontrol.h"
#include "pikatools-utils.h"
#include "pika-intl.h"
/* local function prototypes */
static void pika_gradient_tool_dispose (GObject *object);
static gboolean pika_gradient_tool_initialize (PikaTool *tool,
PikaDisplay *display,
GError **error);
static void pika_gradient_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static void pika_gradient_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display);
static void pika_gradient_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_gradient_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static gboolean pika_gradient_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display);
static void pika_gradient_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display);
static void pika_gradient_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display);
static const gchar * pika_gradient_tool_can_undo (PikaTool *tool,
PikaDisplay *display);
static const gchar * pika_gradient_tool_can_redo (PikaTool *tool,
PikaDisplay *display);
static gboolean pika_gradient_tool_undo (PikaTool *tool,
PikaDisplay *display);
static gboolean pika_gradient_tool_redo (PikaTool *tool,
PikaDisplay *display);
static void pika_gradient_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec);
static void pika_gradient_tool_start (PikaGradientTool *gradient_tool,
const PikaCoords *coords,
PikaDisplay *display);
static void pika_gradient_tool_halt (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_commit (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_line_changed (PikaToolWidget *widget,
PikaGradientTool *gradient_tool);
static void pika_gradient_tool_line_response (PikaToolWidget *widget,
gint response_id,
PikaGradientTool *gradient_tool);
static void pika_gradient_tool_precalc_shapeburst (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_create_graph (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_update_graph (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_fg_bg_changed (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_gradient_dirty (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_set_gradient (PikaGradientTool *gradient_tool,
PikaGradient *gradient);
static gboolean pika_gradient_tool_is_shapeburst (PikaGradientTool *gradient_tool);
static void pika_gradient_tool_create_filter (PikaGradientTool *gradient_tool,
PikaDrawable *drawable);
static void pika_gradient_tool_filter_flush (PikaDrawableFilter *filter,
PikaTool *tool);
G_DEFINE_TYPE (PikaGradientTool, pika_gradient_tool, PIKA_TYPE_DRAW_TOOL)
#define parent_class pika_gradient_tool_parent_class
void
pika_gradient_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_GRADIENT_TOOL,
PIKA_TYPE_GRADIENT_OPTIONS,
pika_gradient_options_gui,
PIKA_CONTEXT_PROP_MASK_FOREGROUND |
PIKA_CONTEXT_PROP_MASK_BACKGROUND |
PIKA_CONTEXT_PROP_MASK_OPACITY |
PIKA_CONTEXT_PROP_MASK_PAINT_MODE |
PIKA_CONTEXT_PROP_MASK_GRADIENT,
"pika-gradient-tool",
_("Gradient"),
_("Gradient Tool: Fill selected area with a color gradient"),
N_("Gra_dient"), "G",
NULL, PIKA_HELP_TOOL_GRADIENT,
PIKA_ICON_TOOL_GRADIENT,
data);
}
static void
pika_gradient_tool_class_init (PikaGradientToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
object_class->dispose = pika_gradient_tool_dispose;
tool_class->initialize = pika_gradient_tool_initialize;
tool_class->control = pika_gradient_tool_control;
tool_class->button_press = pika_gradient_tool_button_press;
tool_class->button_release = pika_gradient_tool_button_release;
tool_class->motion = pika_gradient_tool_motion;
tool_class->key_press = pika_gradient_tool_key_press;
tool_class->modifier_key = pika_gradient_tool_modifier_key;
tool_class->cursor_update = pika_gradient_tool_cursor_update;
tool_class->can_undo = pika_gradient_tool_can_undo;
tool_class->can_redo = pika_gradient_tool_can_redo;
tool_class->undo = pika_gradient_tool_undo;
tool_class->redo = pika_gradient_tool_redo;
tool_class->options_notify = pika_gradient_tool_options_notify;
}
static void
pika_gradient_tool_init (PikaGradientTool *gradient_tool)
{
PikaTool *tool = PIKA_TOOL (gradient_tool);
pika_tool_control_set_scroll_lock (tool->control, TRUE);
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_ACTIVE_DRAWABLE);
pika_tool_control_set_dirty_action (tool->control,
PIKA_TOOL_ACTION_COMMIT);
pika_tool_control_set_wants_click (tool->control, TRUE);
pika_tool_control_set_wants_double_click (tool->control, TRUE);
pika_tool_control_set_active_modifiers (tool->control,
PIKA_TOOL_ACTIVE_MODIFIERS_SEPARATE);
pika_tool_control_set_precision (tool->control,
PIKA_CURSOR_PRECISION_SUBPIXEL);
pika_tool_control_set_tool_cursor (tool->control,
PIKA_TOOL_CURSOR_GRADIENT);
pika_tool_control_set_action_opacity (tool->control,
"context-opacity-set");
pika_tool_control_set_action_object_1 (tool->control,
"context-gradient-select-set");
pika_draw_tool_set_default_status (PIKA_DRAW_TOOL (tool),
_("Click-Drag to draw a gradient"));
}
static void
pika_gradient_tool_dispose (GObject *object)
{
PikaGradientTool *gradient_tool = PIKA_GRADIENT_TOOL (object);
pika_gradient_tool_set_gradient (gradient_tool, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
pika_gradient_tool_initialize (PikaTool *tool,
PikaDisplay *display,
GError **error)
{
PikaImage *image = pika_display_get_image (display);
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (tool);
PikaGuiConfig *config = PIKA_GUI_CONFIG (display->pika->config);
PikaItem *locked_item = NULL;
GList *drawables;
PikaDrawable *drawable;
if (! PIKA_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
drawables = pika_image_get_selected_drawables (image);
if (g_list_length (drawables) != 1)
{
if (g_list_length (drawables) > 1)
pika_tool_message_literal (tool, display,
_("Cannot paint on multiple drawables. Select only one."));
else
pika_tool_message_literal (tool, display, _("No active drawables."));
g_list_free (drawables);
return FALSE;
}
/* Only a single drawable at this point. */
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 layer'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 selected item is not visible."));
return FALSE;
}
if (! pika_context_get_gradient (PIKA_CONTEXT (options)))
{
g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
_("No gradient available for use with this tool."));
return FALSE;
}
return TRUE;
}
static void
pika_gradient_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
PikaGradientTool *gradient_tool = PIKA_GRADIENT_TOOL (tool);
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
pika_gradient_tool_halt (gradient_tool);
break;
case PIKA_TOOL_ACTION_COMMIT:
pika_gradient_tool_commit (gradient_tool);
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
pika_gradient_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display)
{
PikaGradientTool *gradient_tool = PIKA_GRADIENT_TOOL (tool);
if (tool->display && display != tool->display)
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, tool->display);
if (! gradient_tool->widget)
{
pika_gradient_tool_start (gradient_tool, coords, display);
pika_tool_widget_hover (gradient_tool->widget, coords, state, TRUE);
}
/* call start_edit() before widget_button_press(), because we need to record
* the undo state before widget_button_press() potentially changes it. note
* that if widget_button_press() return FALSE, nothing changes and no undo
* step is created.
*/
if (press_type == PIKA_BUTTON_PRESS_NORMAL)
pika_gradient_tool_editor_start_edit (gradient_tool);
if (pika_tool_widget_button_press (gradient_tool->widget, coords, time, state,
press_type))
{
gradient_tool->grab_widget = gradient_tool->widget;
}
if (press_type == PIKA_BUTTON_PRESS_NORMAL)
pika_tool_control_activate (tool->control);
}
static void
pika_gradient_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaGradientTool *gradient_tool = PIKA_GRADIENT_TOOL (tool);
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (tool);
pika_tool_pop_status (tool, display);
pika_tool_control_halt (tool->control);
if (gradient_tool->grab_widget)
{
pika_tool_widget_button_release (gradient_tool->grab_widget,
coords, time, state, release_type);
gradient_tool->grab_widget = NULL;
if (options->instant)
{
if (release_type == PIKA_BUTTON_RELEASE_CANCEL)
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, display);
else
pika_tool_control (tool, PIKA_TOOL_ACTION_COMMIT, display);
}
}
if (! options->instant)
{
pika_gradient_tool_editor_end_edit (gradient_tool,
release_type ==
PIKA_BUTTON_RELEASE_CANCEL);
}
}
static void
pika_gradient_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaGradientTool *gradient_tool = PIKA_GRADIENT_TOOL (tool);
if (gradient_tool->grab_widget)
{
pika_tool_widget_motion (gradient_tool->grab_widget, coords, time, state);
}
}
static gboolean
pika_gradient_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display)
{
PikaGradientTool *gradient_tool = PIKA_GRADIENT_TOOL (tool);
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
gboolean result;
/* call start_edit() before widget_key_press(), because we need to record the
* undo state before widget_key_press() potentially changes it. note that if
* widget_key_press() return FALSE, nothing changes and no undo step is
* created.
*/
if (display == draw_tool->display)
pika_gradient_tool_editor_start_edit (gradient_tool);
result = PIKA_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
if (display == draw_tool->display)
pika_gradient_tool_editor_end_edit (gradient_tool, FALSE);
return result;
}
static void
pika_gradient_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display)
{
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (tool);
if (key == pika_get_extend_selection_mask ())
{
if (options->instant_toggle &&
gtk_widget_get_sensitive (options->instant_toggle))
{
g_object_set (options,
"instant", ! options->instant,
NULL);
}
}
}
static void
pika_gradient_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display)
{
PikaGuiConfig *config = PIKA_GUI_CONFIG (display->pika->config);
PikaImage *image = pika_display_get_image (display);
GList *drawables = pika_image_get_selected_drawables (image);
if (g_list_length (drawables) != 1 ||
pika_viewable_get_children (drawables->data) ||
pika_item_is_content_locked (drawables->data, NULL) ||
! (pika_item_is_visible (drawables->data) ||
config->edit_non_visible))
{
pika_tool_set_cursor (tool, display,
pika_tool_control_get_cursor (tool->control),
pika_tool_control_get_tool_cursor (tool->control),
PIKA_CURSOR_MODIFIER_BAD);
g_list_free (drawables);
return;
}
g_list_free (drawables);
PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static const gchar *
pika_gradient_tool_can_undo (PikaTool *tool,
PikaDisplay *display)
{
return pika_gradient_tool_editor_can_undo (PIKA_GRADIENT_TOOL (tool));
}
static const gchar *
pika_gradient_tool_can_redo (PikaTool *tool,
PikaDisplay *display)
{
return pika_gradient_tool_editor_can_redo (PIKA_GRADIENT_TOOL (tool));
}
static gboolean
pika_gradient_tool_undo (PikaTool *tool,
PikaDisplay *display)
{
return pika_gradient_tool_editor_undo (PIKA_GRADIENT_TOOL (tool));
}
static gboolean
pika_gradient_tool_redo (PikaTool *tool,
PikaDisplay *display)
{
return pika_gradient_tool_editor_redo (PIKA_GRADIENT_TOOL (tool));
}
static void
pika_gradient_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec)
{
PikaContext *context = PIKA_CONTEXT (options);
PikaGradientTool *gradient_tool = PIKA_GRADIENT_TOOL (tool);
if (! strcmp (pspec->name, "gradient"))
{
pika_gradient_tool_set_gradient (gradient_tool, context->gradient);
if (gradient_tool->filter)
pika_drawable_filter_apply (gradient_tool->filter, NULL);
}
else if (gradient_tool->render_node &&
gegl_node_find_property (gradient_tool->render_node, pspec->name))
{
/* Sync any property changes on the config object that match the op */
GValue value = G_VALUE_INIT;
g_value_init (&value, pspec->value_type);
g_object_get_property (G_OBJECT (options), pspec->name, &value);
gegl_node_set_property (gradient_tool->render_node, pspec->name, &value);
g_value_unset (&value);
if (! strcmp (pspec->name, "gradient-type"))
{
PikaRepeatMode gradient_repeat;
PikaRepeatMode node_repeat;
PikaGradientType gradient_type;
gradient_repeat = PIKA_PAINT_OPTIONS (options)->gradient_options->gradient_repeat;
gradient_type = PIKA_GRADIENT_OPTIONS (options)->gradient_type;
gegl_node_get (gradient_tool->render_node,
"gradient-repeat", &node_repeat,
NULL);
if (gradient_type >= PIKA_GRADIENT_SHAPEBURST_ANGULAR)
{
/* These gradient types are only meant to work with repeat
* value of "none" so these are the only ones where we
* don't keep the render node and the gradient options in
* sync.
* We could instead reset the "gradient-repeat" value on
* PikaGradientOptions, but I assume one would want to revert
* back to the last set value if changing back the
* gradient type. So instead we just make the option
* insensitive (both in GUI and in render).
*/
if (node_repeat != PIKA_REPEAT_NONE)
gegl_node_set (gradient_tool->render_node,
"gradient-repeat", PIKA_REPEAT_NONE,
NULL);
}
else if (node_repeat != gradient_repeat)
{
gegl_node_set (gradient_tool->render_node,
"gradient-repeat", gradient_repeat,
NULL);
}
if (pika_gradient_tool_is_shapeburst (gradient_tool))
pika_gradient_tool_precalc_shapeburst (gradient_tool);
pika_gradient_tool_update_graph (gradient_tool);
}
pika_drawable_filter_apply (gradient_tool->filter, NULL);
}
else if (gradient_tool->render_node &&
pika_gradient_tool_is_shapeburst (gradient_tool) &&
g_strcmp0 (pspec->name, "distance-metric") == 0)
{
g_clear_object (&gradient_tool->dist_buffer);
pika_gradient_tool_precalc_shapeburst (gradient_tool);
pika_gradient_tool_update_graph (gradient_tool);
pika_drawable_filter_apply (gradient_tool->filter, NULL);
}
else if (gradient_tool->filter &&
! strcmp (pspec->name, "opacity"))
{
pika_drawable_filter_set_opacity (gradient_tool->filter,
pika_context_get_opacity (context));
}
else if (gradient_tool->filter &&
! strcmp (pspec->name, "paint-mode"))
{
pika_drawable_filter_set_mode (gradient_tool->filter,
pika_context_get_paint_mode (context),
PIKA_LAYER_COLOR_SPACE_AUTO,
PIKA_LAYER_COLOR_SPACE_AUTO,
pika_layer_mode_get_paint_composite_mode (
pika_context_get_paint_mode (context)));
}
pika_gradient_tool_editor_options_notify (gradient_tool, options, pspec);
}
static void
pika_gradient_tool_start (PikaGradientTool *gradient_tool,
const PikaCoords *coords,
PikaDisplay *display)
{
PikaTool *tool = PIKA_TOOL (gradient_tool);
PikaDisplayShell *shell = pika_display_get_shell (display);
PikaImage *image = pika_display_get_image (display);
GList *drawables = pika_image_get_selected_drawables (image);
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (gradient_tool);
PikaContext *context = PIKA_CONTEXT (options);
g_return_if_fail (g_list_length (drawables) == 1);
if (options->instant_toggle)
gtk_widget_set_sensitive (options->instant_toggle, FALSE);
tool->display = display;
g_list_free (tool->drawables);
tool->drawables = drawables;
gradient_tool->start_x = coords->x;
gradient_tool->start_y = coords->y;
gradient_tool->end_x = coords->x;
gradient_tool->end_y = coords->y;
gradient_tool->widget = pika_tool_line_new (shell,
gradient_tool->start_x,
gradient_tool->start_y,
gradient_tool->end_x,
gradient_tool->end_y);
g_object_set (gradient_tool->widget,
"status-title", _("Gradient: "),
NULL);
pika_draw_tool_set_widget (PIKA_DRAW_TOOL (tool), gradient_tool->widget);
g_signal_connect (gradient_tool->widget, "changed",
G_CALLBACK (pika_gradient_tool_line_changed),
gradient_tool);
g_signal_connect (gradient_tool->widget, "response",
G_CALLBACK (pika_gradient_tool_line_response),
gradient_tool);
g_signal_connect_swapped (context, "background-changed",
G_CALLBACK (pika_gradient_tool_fg_bg_changed),
gradient_tool);
g_signal_connect_swapped (context, "foreground-changed",
G_CALLBACK (pika_gradient_tool_fg_bg_changed),
gradient_tool);
pika_gradient_tool_create_filter (gradient_tool, tool->drawables->data);
/* Initially sync all of the properties */
pika_operation_config_sync_node (G_OBJECT (options),
gradient_tool->render_node);
/* We don't allow repeat values for some shapes. */
if (options->gradient_type >= PIKA_GRADIENT_SHAPEBURST_ANGULAR)
gegl_node_set (gradient_tool->render_node,
"gradient-repeat", PIKA_REPEAT_NONE,
NULL);
/* Connect signal handlers for the gradient */
pika_gradient_tool_set_gradient (gradient_tool, context->gradient);
if (pika_gradient_tool_is_shapeburst (gradient_tool))
pika_gradient_tool_precalc_shapeburst (gradient_tool);
pika_draw_tool_start (PIKA_DRAW_TOOL (gradient_tool), display);
pika_gradient_tool_editor_start (gradient_tool);
}
static void
pika_gradient_tool_halt (PikaGradientTool *gradient_tool)
{
PikaTool *tool = PIKA_TOOL (gradient_tool);
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (gradient_tool);
PikaContext *context = PIKA_CONTEXT (options);
pika_gradient_tool_editor_halt (gradient_tool);
if (gradient_tool->graph)
{
g_clear_object (&gradient_tool->graph);
gradient_tool->render_node = NULL;
#if 0
gradient_tool->subtract_node = NULL;
gradient_tool->divide_node = NULL;
#endif
gradient_tool->dist_node = NULL;
}
g_clear_object (&gradient_tool->dist_buffer);
if (gradient_tool->filter)
{
pika_tool_control_push_preserve (tool->control, TRUE);
pika_drawable_filter_abort (gradient_tool->filter);
g_object_unref (gradient_tool->filter);
gradient_tool->filter = NULL;
pika_tool_control_pop_preserve (tool->control);
pika_image_flush (pika_display_get_image (tool->display));
}
pika_gradient_tool_set_tentative_gradient (gradient_tool, NULL);
g_signal_handlers_disconnect_by_func (context,
G_CALLBACK (pika_gradient_tool_fg_bg_changed),
gradient_tool);
if (tool->display)
pika_tool_pop_status (tool, tool->display);
if (pika_draw_tool_is_active (PIKA_DRAW_TOOL (gradient_tool)))
pika_draw_tool_stop (PIKA_DRAW_TOOL (gradient_tool));
pika_draw_tool_set_widget (PIKA_DRAW_TOOL (tool), NULL);
g_clear_object (&gradient_tool->widget);
tool->display = NULL;
g_list_free (tool->drawables);
tool->drawables = NULL;
if (options->instant_toggle)
gtk_widget_set_sensitive (options->instant_toggle, TRUE);
}
static void
pika_gradient_tool_commit (PikaGradientTool *gradient_tool)
{
PikaTool *tool = PIKA_TOOL (gradient_tool);
if (gradient_tool->filter)
{
/* halt the editor before committing the filter so that the image-flush
* idle source is removed, to avoid flushing the image, and hence
* restarting the projection rendering, while applying the filter.
*/
pika_gradient_tool_editor_halt (gradient_tool);
pika_tool_control_push_preserve (tool->control, TRUE);
pika_drawable_filter_commit (gradient_tool->filter,
PIKA_PROGRESS (tool), FALSE);
g_clear_object (&gradient_tool->filter);
pika_tool_control_pop_preserve (tool->control);
pika_image_flush (pika_display_get_image (tool->display));
}
}
static void
pika_gradient_tool_line_changed (PikaToolWidget *widget,
PikaGradientTool *gradient_tool)
{
gdouble start_x;
gdouble start_y;
gdouble end_x;
gdouble end_y;
gboolean update = FALSE;
g_object_get (widget,
"x1", &start_x,
"y1", &start_y,
"x2", &end_x,
"y2", &end_y,
NULL);
if (start_x != gradient_tool->start_x ||
start_y != gradient_tool->start_y ||
end_x != gradient_tool->end_x ||
end_y != gradient_tool->end_y)
{
gradient_tool->start_x = start_x;
gradient_tool->start_y = start_y;
gradient_tool->end_x = end_x;
gradient_tool->end_y = end_y;
update = TRUE;
}
if (pika_gradient_tool_editor_line_changed (gradient_tool))
update = TRUE;
if (update)
{
pika_gradient_tool_update_graph (gradient_tool);
pika_drawable_filter_apply (gradient_tool->filter, NULL);
}
}
static void
pika_gradient_tool_line_response (PikaToolWidget *widget,
gint response_id,
PikaGradientTool *gradient_tool)
{
PikaTool *tool = PIKA_TOOL (gradient_tool);
switch (response_id)
{
case PIKA_TOOL_WIDGET_RESPONSE_CONFIRM:
pika_tool_control (tool, PIKA_TOOL_ACTION_COMMIT, tool->display);
break;
case PIKA_TOOL_WIDGET_RESPONSE_CANCEL:
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, tool->display);
break;
}
}
static void
pika_gradient_tool_precalc_shapeburst (PikaGradientTool *gradient_tool)
{
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (gradient_tool);
PikaTool *tool = PIKA_TOOL (gradient_tool);
gint x, y, width, height;
if (gradient_tool->dist_buffer || ! tool->drawables)
return;
g_return_if_fail (g_list_length (tool->drawables) == 1);
if (! pika_item_mask_intersect (PIKA_ITEM (tool->drawables->data),
&x, &y, &width, &height))
return;
gradient_tool->dist_buffer =
pika_drawable_gradient_shapeburst_distmap (tool->drawables->data,
options->distance_metric,
GEGL_RECTANGLE (x, y, width, height),
PIKA_PROGRESS (gradient_tool));
if (gradient_tool->dist_node)
gegl_node_set (gradient_tool->dist_node,
"buffer", gradient_tool->dist_buffer,
NULL);
pika_progress_end (PIKA_PROGRESS (gradient_tool));
}
/* gegl graph stuff */
static void
pika_gradient_tool_create_graph (PikaGradientTool *gradient_tool)
{
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (gradient_tool);
PikaContext *context = PIKA_CONTEXT (options);
GeglNode *output;
/* render_node is not supposed to be recreated */
g_return_if_fail (gradient_tool->graph == NULL);
gradient_tool->graph = gegl_node_new ();
gradient_tool->dist_node =
gegl_node_new_child (gradient_tool->graph,
"operation", "gegl:buffer-source",
"buffer", gradient_tool->dist_buffer,
NULL);
#if 0
gradient_tool->subtract_node =
gegl_node_new_child (gradient_tool->graph,
"operation", "gegl:subtract",
NULL);
gradient_tool->divide_node =
gegl_node_new_child (gradient_tool->graph,
"operation", "gegl:divide",
NULL);
#endif
gradient_tool->render_node =
gegl_node_new_child (gradient_tool->graph,
"operation", "pika:gradient",
"context", context,
NULL);
output = gegl_node_get_output_proxy (gradient_tool->graph, "output");
gegl_node_link_many (gradient_tool->dist_node,
#if 0
gradient_tool->subtract_node,
gradient_tool->divide_node,
#endif
gradient_tool->render_node,
output,
NULL);
pika_gegl_node_set_underlying_operation (gradient_tool->graph,
gradient_tool->render_node);
pika_gradient_tool_update_graph (gradient_tool);
}
static void
pika_gradient_tool_update_graph (PikaGradientTool *gradient_tool)
{
PikaTool *tool = PIKA_TOOL (gradient_tool);
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (gradient_tool);
gint off_x, off_y;
pika_item_get_offset (PIKA_ITEM (tool->drawables->data), &off_x, &off_y);
#if 0
if (pika_gradient_tool_is_shapeburst (gradient_tool))
{
gfloat start, end;
gegl_buffer_get (gradient_tool->dist_buffer,
GEGL_RECTANGLE (gradient_tool->start_x - off_x,
gradient_tool->start_y - off_y,
1, 1),
1.0, babl_format("Y float"), &start,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
gegl_buffer_get (gradient_tool->dist_buffer,
GEGL_RECTANGLE (gradient_tool->end_x - off_x,
gradient_tool->end_y - off_y,
1, 1),
1.0, babl_format("Y float"), &end,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
if (start != end)
{
gegl_node_set (gradient_tool->subtract_node,
"value", (gdouble) start,
NULL);
gegl_node_set (gradient_tool->divide_node,
"value", (gdouble) (end - start),
NULL);
}
}
else
#endif
{
GeglRectangle roi;
gdouble start_x, start_y;
gdouble end_x, end_y;
pika_item_mask_intersect (PIKA_ITEM (tool->drawables->data),
&roi.x, &roi.y, &roi.width, &roi.height);
start_x = gradient_tool->start_x - off_x;
start_y = gradient_tool->start_y - off_y;
end_x = gradient_tool->end_x - off_x;
end_y = gradient_tool->end_y - off_y;
pika_drawable_gradient_adjust_coords (tool->drawables->data,
options->gradient_type,
&roi,
&start_x, &start_y, &end_x, &end_y);
gegl_node_set (gradient_tool->render_node,
"start-x", start_x,
"start-y", start_y,
"end-x", end_x,
"end-y", end_y,
NULL);
}
}
static void
pika_gradient_tool_fg_bg_changed (PikaGradientTool *gradient_tool)
{
if (! gradient_tool->filter || ! gradient_tool->gradient)
return;
if (pika_gradient_has_fg_bg_segments (gradient_tool->gradient))
{
/* Set a property on the node. Otherwise it will cache and refuse to update */
gegl_node_set (gradient_tool->render_node,
"gradient", gradient_tool->gradient,
NULL);
/* Update the filter */
pika_drawable_filter_apply (gradient_tool->filter, NULL);
pika_gradient_tool_editor_fg_bg_changed (gradient_tool);
}
}
static void
pika_gradient_tool_gradient_dirty (PikaGradientTool *gradient_tool)
{
if (! gradient_tool->filter)
return;
if (! gradient_tool->tentative_gradient)
{
/* Set a property on the node. Otherwise it will cache and refuse to update */
gegl_node_set (gradient_tool->render_node,
"gradient", gradient_tool->gradient,
NULL);
/* Update the filter */
pika_drawable_filter_apply (gradient_tool->filter, NULL);
}
pika_gradient_tool_editor_gradient_dirty (gradient_tool);
}
static void
pika_gradient_tool_set_gradient (PikaGradientTool *gradient_tool,
PikaGradient *gradient)
{
if (gradient_tool->gradient)
g_signal_handlers_disconnect_by_func (gradient_tool->gradient,
G_CALLBACK (pika_gradient_tool_gradient_dirty),
gradient_tool);
g_set_object (&gradient_tool->gradient, gradient);
if (gradient_tool->gradient)
{
g_signal_connect_swapped (gradient_tool->gradient, "dirty",
G_CALLBACK (pika_gradient_tool_gradient_dirty),
gradient_tool);
if (gradient_tool->render_node)
gegl_node_set (gradient_tool->render_node,
"gradient", gradient_tool->gradient,
NULL);
}
pika_gradient_tool_editor_gradient_changed (gradient_tool);
}
static gboolean
pika_gradient_tool_is_shapeburst (PikaGradientTool *gradient_tool)
{
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (gradient_tool);
return options->gradient_type >= PIKA_GRADIENT_SHAPEBURST_ANGULAR &&
options->gradient_type <= PIKA_GRADIENT_SHAPEBURST_DIMPLED;
}
/* image map stuff */
static void
pika_gradient_tool_create_filter (PikaGradientTool *gradient_tool,
PikaDrawable *drawable)
{
PikaGradientOptions *options = PIKA_GRADIENT_TOOL_GET_OPTIONS (gradient_tool);
PikaContext *context = PIKA_CONTEXT (options);
if (! gradient_tool->graph)
pika_gradient_tool_create_graph (gradient_tool);
gradient_tool->filter = pika_drawable_filter_new (drawable,
C_("undo-type", "Gradient"),
gradient_tool->graph,
PIKA_ICON_TOOL_GRADIENT);
pika_drawable_filter_set_region (gradient_tool->filter,
PIKA_FILTER_REGION_DRAWABLE);
pika_drawable_filter_set_opacity (gradient_tool->filter,
pika_context_get_opacity (context));
pika_drawable_filter_set_mode (gradient_tool->filter,
pika_context_get_paint_mode (context),
PIKA_LAYER_COLOR_SPACE_AUTO,
PIKA_LAYER_COLOR_SPACE_AUTO,
pika_layer_mode_get_paint_composite_mode (
pika_context_get_paint_mode (context)));
g_signal_connect (gradient_tool->filter, "flush",
G_CALLBACK (pika_gradient_tool_filter_flush),
gradient_tool);
}
static void
pika_gradient_tool_filter_flush (PikaDrawableFilter *filter,
PikaTool *tool)
{
PikaImage *image = pika_display_get_image (tool->display);
pika_projection_flush (pika_image_get_projection (image));
}
/* protected functions */
void
pika_gradient_tool_set_tentative_gradient (PikaGradientTool *gradient_tool,
PikaGradient *gradient)
{
g_return_if_fail (PIKA_IS_GRADIENT_TOOL (gradient_tool));
g_return_if_fail (gradient == NULL || PIKA_IS_GRADIENT (gradient));
if (g_set_object (&gradient_tool->tentative_gradient, gradient))
{
if (gradient_tool->render_node)
{
gegl_node_set (gradient_tool->render_node,
"gradient", gradient ? gradient : gradient_tool->gradient,
NULL);
pika_drawable_filter_apply (gradient_tool->filter, NULL);
}
}
}
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