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gimp/app/tools/gimpblendtool.c

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/* GIMP - The GNU Image Manipulation Program
* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "operations/gimp-operation-config.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-blend.h"
#include "core/gimpdrawablefilter.h"
#include "core/gimperror.h"
#include "core/gimpgradient.h"
#include "core/gimpimage.h"
#include "core/gimpprogress.h"
#include "core/gimpprojection.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpdisplay.h"
#include "display/gimptoolline.h"
#include "gimpblendoptions.h"
#include "gimpblendtool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
typedef struct _BlendInfo BlendInfo;
struct _BlendInfo
{
gdouble start_x;
gdouble start_y;
gdouble end_x;
gdouble end_y;
};
/* local function prototypes */
static void gimp_blend_tool_dispose (GObject *object);
static gboolean gimp_blend_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static void gimp_blend_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static void gimp_blend_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_blend_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_blend_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static void gimp_blend_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static const gchar * gimp_blend_tool_can_undo (GimpTool *tool,
GimpDisplay *display);
static const gchar * gimp_blend_tool_can_redo (GimpTool *tool,
GimpDisplay *display);
static gboolean gimp_blend_tool_undo (GimpTool *tool,
GimpDisplay *display);
static gboolean gimp_blend_tool_redo (GimpTool *tool,
GimpDisplay *display);
static void gimp_blend_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec);
static void gimp_blend_tool_start (GimpBlendTool *blend_tool,
const GimpCoords *coords,
GimpDisplay *display);
static void gimp_blend_tool_halt (GimpBlendTool *blend_tool);
static void gimp_blend_tool_commit (GimpBlendTool *blend_tool);
static void gimp_blend_tool_line_changed (GimpToolWidget *widget,
GimpBlendTool *blend_tool);
static void gimp_blend_tool_line_response (GimpToolWidget *widget,
gint response_id,
GimpBlendTool *blend_tool);
static void gimp_blend_tool_precalc_shapeburst (GimpBlendTool *blend_tool);
static void gimp_blend_tool_create_graph (GimpBlendTool *blend_tool);
static void gimp_blend_tool_update_graph (GimpBlendTool *blend_tool);
static void gimp_blend_tool_gradient_dirty (GimpBlendTool *blend_tool);
static void gimp_blend_tool_set_gradient (GimpBlendTool *blend_tool,
GimpGradient *gradient);
static gboolean gimp_blend_tool_is_shapeburst (GimpBlendTool *blend_tool);
static void gimp_blend_tool_create_filter (GimpBlendTool *blend_tool,
GimpDrawable *drawable);
static void gimp_blend_tool_filter_flush (GimpDrawableFilter *filter,
GimpTool *tool);
static BlendInfo * blend_info_new (gdouble start_x,
gdouble start_y,
gdouble end_x,
gdouble end_y);
static void blend_info_free (BlendInfo *info);
G_DEFINE_TYPE (GimpBlendTool, gimp_blend_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_blend_tool_parent_class
void
gimp_blend_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_BLEND_TOOL,
GIMP_TYPE_BLEND_OPTIONS,
gimp_blend_options_gui,
GIMP_CONTEXT_PROP_MASK_FOREGROUND |
GIMP_CONTEXT_PROP_MASK_BACKGROUND |
GIMP_CONTEXT_PROP_MASK_OPACITY |
GIMP_CONTEXT_PROP_MASK_PAINT_MODE |
GIMP_CONTEXT_PROP_MASK_GRADIENT,
"gimp-blend-tool",
_("Blend"),
_("Blend Tool: Fill selected area with a color gradient"),
N_("Blen_d"), "L",
NULL, GIMP_HELP_TOOL_BLEND,
GIMP_ICON_TOOL_BLEND,
data);
}
static void
gimp_blend_tool_class_init (GimpBlendToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
object_class->dispose = gimp_blend_tool_dispose;
tool_class->initialize = gimp_blend_tool_initialize;
tool_class->control = gimp_blend_tool_control;
tool_class->button_press = gimp_blend_tool_button_press;
tool_class->button_release = gimp_blend_tool_button_release;
tool_class->motion = gimp_blend_tool_motion;
tool_class->cursor_update = gimp_blend_tool_cursor_update;
tool_class->can_undo = gimp_blend_tool_can_undo;
tool_class->can_redo = gimp_blend_tool_can_redo;
tool_class->undo = gimp_blend_tool_undo;
tool_class->redo = gimp_blend_tool_redo;
tool_class->options_notify = gimp_blend_tool_options_notify;
}
static void
gimp_blend_tool_init (GimpBlendTool *blend_tool)
{
GimpTool *tool = GIMP_TOOL (blend_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 |
GIMP_DIRTY_IMAGE_STRUCTURE |
GIMP_DIRTY_DRAWABLE |
GIMP_DIRTY_ACTIVE_DRAWABLE);
gimp_tool_control_set_wants_click (tool->control, TRUE);
gimp_tool_control_set_precision (tool->control,
GIMP_CURSOR_PRECISION_SUBPIXEL);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_BLEND);
gimp_tool_control_set_action_opacity (tool->control,
"context/context-opacity-set");
gimp_tool_control_set_action_object_1 (tool->control,
"context/context-gradient-select-set");
gimp_draw_tool_set_default_status (GIMP_DRAW_TOOL (tool),
_("Click-Drag to draw a gradient"));
}
static void
gimp_blend_tool_dispose (GObject *object)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (object);
gimp_blend_tool_set_gradient (blend_tool, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
gimp_blend_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (tool);
if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
if (gimp_viewable_get_children (GIMP_VIEWABLE (drawable)))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Cannot modify the pixels of layer groups."));
return FALSE;
}
if (gimp_item_is_content_locked (GIMP_ITEM (drawable)))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("The active layer's pixels are locked."));
return FALSE;
}
if (! gimp_item_is_visible (GIMP_ITEM (drawable)))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("The active layer is not visible."));
return FALSE;
}
if (! gimp_context_get_gradient (GIMP_CONTEXT (options)))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("No gradient available for use with this tool."));
return FALSE;
}
return TRUE;
}
static void
gimp_blend_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
case GIMP_TOOL_ACTION_RESUME:
break;
case GIMP_TOOL_ACTION_HALT:
gimp_blend_tool_halt (blend_tool);
break;
case GIMP_TOOL_ACTION_COMMIT:
gimp_blend_tool_commit (blend_tool);
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
gimp_blend_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
gdouble start_x;
gdouble start_y;
gdouble end_x;
gdouble end_y;
if (tool->display && display != tool->display)
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, tool->display);
if (! blend_tool->widget)
{
gimp_blend_tool_start (blend_tool, coords, display);
gimp_tool_widget_hover (blend_tool->widget, coords, state, TRUE);
}
/* save the current line for undo, widget_button_press() might change it
*/
start_x = blend_tool->start_x;
start_y = blend_tool->start_y;
end_x = blend_tool->end_x;
end_y = blend_tool->end_y;
if (gimp_tool_widget_button_press (blend_tool->widget, coords, time, state,
press_type))
{
blend_tool->grab_widget = blend_tool->widget;
blend_tool->undo_stack =
g_list_prepend (blend_tool->undo_stack,
blend_info_new (start_x, start_y, end_x, end_y));
}
gimp_tool_control_activate (tool->control);
}
static void
gimp_blend_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
gimp_tool_pop_status (tool, display);
gimp_tool_control_halt (tool->control);
if (blend_tool->grab_widget)
{
gimp_tool_widget_button_release (blend_tool->grab_widget,
coords, time, state, release_type);
blend_tool->grab_widget = NULL;
if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
{
/* simply destroy the undo step we pushed in button_press(),
* the tool widget restored the old position by itself
*/
blend_info_free (blend_tool->undo_stack->data);
blend_tool->undo_stack = g_list_remove (blend_tool->undo_stack,
blend_tool->undo_stack->data);
}
else
{
/* blow the redo stack, we had an actual undoable movement
*/
if (blend_tool->redo_stack)
{
g_list_free_full (blend_tool->redo_stack,
(GDestroyNotify) blend_info_free);
blend_tool->redo_stack = NULL;
}
}
/* update the undo actions / menu items */
gimp_image_flush (gimp_display_get_image (display));
}
else if (release_type == GIMP_BUTTON_RELEASE_CLICK ||
release_type == GIMP_BUTTON_RELEASE_NO_MOTION)
{
/* a click outside any handle commits the tool
*/
gimp_tool_control (tool, GIMP_TOOL_ACTION_COMMIT, display);
}
}
static void
gimp_blend_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
if (blend_tool->grab_widget)
{
gimp_tool_widget_motion (blend_tool->grab_widget, coords, time, state);
}
}
static void
gimp_blend_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
if (gimp_viewable_get_children (GIMP_VIEWABLE (drawable)) ||
gimp_item_is_content_locked (GIMP_ITEM (drawable)) ||
! gimp_item_is_visible (GIMP_ITEM (drawable)))
{
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;
}
else if (display != tool->display || ! blend_tool->widget)
{
gimp_tool_set_cursor (tool, display,
gimp_tool_control_get_cursor (tool->control),
gimp_tool_control_get_tool_cursor (tool->control),
GIMP_CURSOR_MODIFIER_PLUS);
return;
}
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static const gchar *
gimp_blend_tool_can_undo (GimpTool *tool,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
if (! blend_tool->undo_stack)
return NULL;
return _("Blend Step");
}
static const gchar *
gimp_blend_tool_can_redo (GimpTool *tool,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
if (! blend_tool->redo_stack)
return NULL;
return _("Blend Step");
}
static gboolean
gimp_blend_tool_undo (GimpTool *tool,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
BlendInfo *info;
info = blend_info_new (blend_tool->start_x,
blend_tool->start_y,
blend_tool->end_x,
blend_tool->end_y);
blend_tool->redo_stack = g_list_prepend (blend_tool->redo_stack, info);
info = blend_tool->undo_stack->data;
g_object_set (blend_tool->widget,
"x1", info->start_x,
"y1", info->start_y,
"x2", info->end_x,
"y2", info->end_y,
NULL);
blend_tool->undo_stack = g_list_remove (blend_tool->undo_stack, info);
blend_info_free (info);
return TRUE;
}
static gboolean
gimp_blend_tool_redo (GimpTool *tool,
GimpDisplay *display)
{
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
BlendInfo *info;
info = blend_info_new (blend_tool->start_x,
blend_tool->start_y,
blend_tool->end_x,
blend_tool->end_y);
blend_tool->undo_stack = g_list_prepend (blend_tool->undo_stack, info);
info = blend_tool->redo_stack->data;
g_object_set (blend_tool->widget,
"x1", info->start_x,
"y1", info->start_y,
"x2", info->end_x,
"y2", info->end_y,
NULL);
blend_tool->redo_stack = g_list_remove (blend_tool->redo_stack, info);
blend_info_free (info);
return TRUE;
}
static void
gimp_blend_tool_options_notify (GimpTool *tool,
GimpToolOptions *options,
const GParamSpec *pspec)
{
GimpContext *context = GIMP_CONTEXT (options);
GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);
if (! strcmp (pspec->name, "gradient"))
{
gimp_blend_tool_set_gradient (blend_tool, context->gradient);
if (blend_tool->filter)
gimp_drawable_filter_apply (blend_tool->filter, NULL);
}
else if (blend_tool->render_node &&
gegl_node_find_property (blend_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 (blend_tool->render_node, pspec->name, &value);
g_value_unset (&value);
if (! strcmp (pspec->name, "gradient-type"))
{
if (gimp_blend_tool_is_shapeburst (blend_tool))
gimp_blend_tool_precalc_shapeburst (blend_tool);
gimp_blend_tool_update_graph (blend_tool);
}
gimp_drawable_filter_apply (blend_tool->filter, NULL);
}
else if (blend_tool->filter &&
! strcmp (pspec->name, "opacity"))
{
gimp_drawable_filter_set_opacity (blend_tool->filter,
gimp_context_get_opacity (context));
}
else if (blend_tool->filter &&
! strcmp (pspec->name, "paint-mode"))
{
gimp_drawable_filter_set_mode (blend_tool->filter,
gimp_context_get_paint_mode (context),
GIMP_LAYER_COLOR_SPACE_AUTO,
GIMP_LAYER_COLOR_SPACE_AUTO,
GIMP_LAYER_COMPOSITE_AUTO);
}
}
static void
gimp_blend_tool_start (GimpBlendTool *blend_tool,
const GimpCoords *coords,
GimpDisplay *display)
{
GimpTool *tool = GIMP_TOOL (blend_tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (blend_tool);
GimpContext *context = GIMP_CONTEXT (options);
tool->display = display;
tool->drawable = drawable;
blend_tool->start_x = coords->x;
blend_tool->start_y = coords->y;
blend_tool->end_x = coords->x;
blend_tool->end_y = coords->y;
blend_tool->widget = gimp_tool_line_new (shell,
blend_tool->start_x,
blend_tool->start_y,
blend_tool->end_x,
blend_tool->end_y);
g_object_set (blend_tool->widget,
"status-title", _("Blend: "),
NULL);
gimp_draw_tool_set_widget (GIMP_DRAW_TOOL (tool), blend_tool->widget);
g_signal_connect (blend_tool->widget, "changed",
G_CALLBACK (gimp_blend_tool_line_changed),
blend_tool);
g_signal_connect (blend_tool->widget, "response",
G_CALLBACK (gimp_blend_tool_line_response),
blend_tool);
gimp_blend_tool_create_filter (blend_tool, drawable);
/* Initially sync all of the properties */
gimp_operation_config_sync_node (G_OBJECT (options),
blend_tool->render_node);
/* Connect signal handlers for the gradient */
gimp_blend_tool_set_gradient (blend_tool, context->gradient);
if (gimp_blend_tool_is_shapeburst (blend_tool))
gimp_blend_tool_precalc_shapeburst (blend_tool);
gimp_draw_tool_start (GIMP_DRAW_TOOL (blend_tool), display);
}
static void
gimp_blend_tool_halt (GimpBlendTool *blend_tool)
{
GimpTool *tool = GIMP_TOOL (blend_tool);
if (blend_tool->graph)
{
g_clear_object (&blend_tool->graph);
blend_tool->render_node = NULL;
#if 0
blend_tool->subtract_node = NULL;
blend_tool->divide_node = NULL;
#endif
blend_tool->dist_node = NULL;
}
g_clear_object (&blend_tool->dist_buffer);
if (blend_tool->filter)
{
gimp_tool_control_push_preserve (tool->control, TRUE);
gimp_drawable_filter_abort (blend_tool->filter);
g_object_unref (blend_tool->filter);
blend_tool->filter = NULL;
gimp_tool_control_pop_preserve (tool->control);
gimp_image_flush (gimp_display_get_image (tool->display));
}
if (blend_tool->undo_stack)
{
g_list_free_full (blend_tool->undo_stack,
(GDestroyNotify) blend_info_free);
blend_tool->undo_stack = NULL;
}
if (blend_tool->redo_stack)
{
g_list_free_full (blend_tool->redo_stack,
(GDestroyNotify) blend_info_free);
blend_tool->redo_stack = NULL;
}
if (tool->display)
gimp_tool_pop_status (tool, tool->display);
if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (blend_tool)))
gimp_draw_tool_stop (GIMP_DRAW_TOOL (blend_tool));
gimp_draw_tool_set_widget (GIMP_DRAW_TOOL (tool), NULL);
g_clear_object (&blend_tool->widget);
tool->display = NULL;
tool->drawable = NULL;
}
static void
gimp_blend_tool_commit (GimpBlendTool *blend_tool)
{
GimpTool *tool = GIMP_TOOL (blend_tool);
if (blend_tool->filter)
{
gimp_tool_control_push_preserve (tool->control, TRUE);
gimp_drawable_filter_commit (blend_tool->filter,
GIMP_PROGRESS (tool), FALSE);
g_clear_object (&blend_tool->filter);
gimp_tool_control_pop_preserve (tool->control);
gimp_image_flush (gimp_display_get_image (tool->display));
}
}
static void
gimp_blend_tool_line_changed (GimpToolWidget *widget,
GimpBlendTool *blend_tool)
{
g_object_get (widget,
"x1", &blend_tool->start_x,
"y1", &blend_tool->start_y,
"x2", &blend_tool->end_x,
"y2", &blend_tool->end_y,
NULL);
gimp_blend_tool_update_graph (blend_tool);
gimp_drawable_filter_apply (blend_tool->filter, NULL);
}
static void
gimp_blend_tool_line_response (GimpToolWidget *widget,
gint response_id,
GimpBlendTool *blend_tool)
{
GimpTool *tool = GIMP_TOOL (blend_tool);
switch (response_id)
{
case GIMP_TOOL_WIDGET_RESPONSE_CONFIRM:
gimp_tool_control (tool, GIMP_TOOL_ACTION_COMMIT, tool->display);
break;
case GIMP_TOOL_WIDGET_RESPONSE_CANCEL:
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, tool->display);
break;
}
}
static void
gimp_blend_tool_precalc_shapeburst (GimpBlendTool *blend_tool)
{
GimpTool *tool = GIMP_TOOL (blend_tool);
gint x, y, width, height;
if (blend_tool->dist_buffer || ! tool->drawable)
return;
if (! gimp_item_mask_intersect (GIMP_ITEM (tool->drawable),
&x, &y, &width, &height))
return;
blend_tool->dist_buffer =
gimp_drawable_blend_shapeburst_distmap (tool->drawable, FALSE,
GEGL_RECTANGLE (x, y, width, height),
GIMP_PROGRESS (blend_tool));
if (blend_tool->dist_node)
gegl_node_set (blend_tool->dist_node,
"buffer", blend_tool->dist_buffer,
NULL);
gimp_progress_end (GIMP_PROGRESS (blend_tool));
}
/* gegl graph stuff */
static void
gimp_blend_tool_create_graph (GimpBlendTool *blend_tool)
{
GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (blend_tool);
GimpContext *context = GIMP_CONTEXT (options);
GeglNode *output;
/* render_node is not supposed to be recreated */
g_return_if_fail (blend_tool->graph == NULL);
blend_tool->graph = gegl_node_new ();
blend_tool->dist_node =
gegl_node_new_child (blend_tool->graph,
"operation", "gegl:buffer-source",
"buffer", blend_tool->dist_buffer,
NULL);
#if 0
blend_tool->subtract_node =
gegl_node_new_child (blend_tool->graph,
"operation", "gegl:subtract",
NULL);
blend_tool->divide_node =
gegl_node_new_child (blend_tool->graph,
"operation", "gegl:divide",
NULL);
#endif
blend_tool->render_node =
gegl_node_new_child (blend_tool->graph,
"operation", "gimp:blend",
"context", context,
NULL);
output = gegl_node_get_output_proxy (blend_tool->graph, "output");
gegl_node_link_many (blend_tool->dist_node,
#if 0
blend_tool->subtract_node,
blend_tool->divide_node,
#endif
blend_tool->render_node,
output,
NULL);
gimp_blend_tool_update_graph (blend_tool);
}
static void
gimp_blend_tool_update_graph (GimpBlendTool *blend_tool)
{
GimpTool *tool = GIMP_TOOL (blend_tool);
gint off_x, off_y;
gimp_item_get_offset (GIMP_ITEM (tool->drawable), &off_x, &off_y);
#if 0
if (gimp_blend_tool_is_shapeburst (blend_tool))
{
gfloat start, end;
gegl_buffer_get (blend_tool->dist_buffer,
GEGL_RECTANGLE (blend_tool->start_x - off_x,
blend_tool->start_y - off_y,
1, 1),
1.0, babl_format("Y float"), &start,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
gegl_buffer_get (blend_tool->dist_buffer,
GEGL_RECTANGLE (blend_tool->end_x - off_x,
blend_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 (blend_tool->subtract_node,
"value", (gdouble) start,
NULL);
gegl_node_set (blend_tool->divide_node,
"value", (gdouble) (end - start),
NULL);
}
}
else
#endif
{
gegl_node_set (blend_tool->render_node,
"start_x", blend_tool->start_x - off_x,
"start_y", blend_tool->start_y - off_y,
"end_x", blend_tool->end_x - off_x,
"end_y", blend_tool->end_y - off_y,
NULL);
}
}
static void
gimp_blend_tool_gradient_dirty (GimpBlendTool *blend_tool)
{
if (! blend_tool->filter)
return;
/* Set a property on the node. Otherwise it will cache and refuse to update */
gegl_node_set (blend_tool->render_node,
"gradient", blend_tool->gradient,
NULL);
/* Update the filter */
gimp_drawable_filter_apply (blend_tool->filter, NULL);
}
static void
gimp_blend_tool_set_gradient (GimpBlendTool *blend_tool,
GimpGradient *gradient)
{
GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (blend_tool);
GimpContext *context = GIMP_CONTEXT (options);
if (blend_tool->gradient)
{
g_signal_handlers_disconnect_by_func (blend_tool->gradient,
G_CALLBACK (gimp_blend_tool_gradient_dirty),
blend_tool);
g_signal_handlers_disconnect_by_func (context,
G_CALLBACK (gimp_blend_tool_gradient_dirty),
blend_tool);
g_object_unref (blend_tool->gradient);
}
blend_tool->gradient = gradient;
if (blend_tool->gradient)
{
g_object_ref (gradient);
g_signal_connect_swapped (blend_tool->gradient, "dirty",
G_CALLBACK (gimp_blend_tool_gradient_dirty),
blend_tool);
if (gimp_gradient_has_fg_bg_segments (blend_tool->gradient))
{
g_signal_connect_swapped (context, "background-changed",
G_CALLBACK (gimp_blend_tool_gradient_dirty),
blend_tool);
g_signal_connect_swapped (context, "foreground-changed",
G_CALLBACK (gimp_blend_tool_gradient_dirty),
blend_tool);
}
if (blend_tool->render_node)
gegl_node_set (blend_tool->render_node,
"gradient", blend_tool->gradient,
NULL);
}
}
static gboolean
gimp_blend_tool_is_shapeburst (GimpBlendTool *blend_tool)
{
GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (blend_tool);
return options->gradient_type >= GIMP_GRADIENT_SHAPEBURST_ANGULAR &&
options->gradient_type <= GIMP_GRADIENT_SHAPEBURST_DIMPLED;
}
/* image map stuff */
static void
gimp_blend_tool_create_filter (GimpBlendTool *blend_tool,
GimpDrawable *drawable)
{
GimpBlendOptions *options = GIMP_BLEND_TOOL_GET_OPTIONS (blend_tool);
GimpContext *context = GIMP_CONTEXT (options);
if (! blend_tool->graph)
gimp_blend_tool_create_graph (blend_tool);
blend_tool->filter = gimp_drawable_filter_new (drawable,
C_("undo-type", "Blend"),
blend_tool->graph,
GIMP_ICON_TOOL_BLEND);
gimp_drawable_filter_set_region (blend_tool->filter,
GIMP_FILTER_REGION_DRAWABLE);
gimp_drawable_filter_set_opacity (blend_tool->filter,
gimp_context_get_opacity (context));
gimp_drawable_filter_set_mode (blend_tool->filter,
gimp_context_get_paint_mode (context),
GIMP_LAYER_COLOR_SPACE_AUTO,
GIMP_LAYER_COLOR_SPACE_AUTO,
GIMP_LAYER_COMPOSITE_AUTO);
g_signal_connect (blend_tool->filter, "flush",
G_CALLBACK (gimp_blend_tool_filter_flush),
blend_tool);
}
static void
gimp_blend_tool_filter_flush (GimpDrawableFilter *filter,
GimpTool *tool)
{
GimpImage *image = gimp_display_get_image (tool->display);
gimp_projection_flush (gimp_image_get_projection (image));
}
static BlendInfo *
blend_info_new (gdouble start_x,
gdouble start_y,
gdouble end_x,
gdouble end_y)
{
BlendInfo *info = g_slice_new0 (BlendInfo);
info->start_x = start_x;
info->start_y = start_y;
info->end_x = end_x;
info->end_y = end_y;
return info;
}
static void
blend_info_free (BlendInfo *info)
{
g_slice_free (BlendInfo, info);
}
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