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PIKApp/app/tools/pikapaintselecttool.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
*
* PikaPaintSelectTool
* Copyright (C) 2020 Thomas Manni <thomas.manni@free.fr>
*
* 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 <math.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libpikamath/pikamath.h"
#include "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "config/pikaguiconfig.h"
#include "gegl/pika-gegl-loops.h"
#include "gegl/pika-gegl-mask.h"
#include "gegl/pika-gegl-utils.h"
#include "core/pika.h"
#include "core/pikachannel-select.h"
#include "core/pikaerror.h"
#include "core/pikaimage.h"
#include "core/pikalayer.h"
#include "core/pikalayermask.h"
#include "core/pikaprogress.h"
#include "core/pikascanconvert.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikawidgets-utils.h"
#include "display/pikadisplay.h"
#include "display/pikadisplayshell.h"
#include "display/pikadisplayshell-scroll.h"
#include "display/pikatoolgui.h"
#include "core/pikatooloptions.h"
#include "pikapaintselecttool.h"
#include "pikapaintselectoptions.h"
#include "pikatoolcontrol.h"
#include "pika-intl.h"
#include "config/pikaguiconfig.h" /* playground */
static void pika_paint_select_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display);
static void pika_paint_select_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display);
static void pika_paint_select_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_paint_select_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static gboolean pika_paint_select_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display);
static void pika_paint_select_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display);
static void pika_paint_select_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display);
static void pika_paint_select_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec);
static void pika_paint_select_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display);
static void pika_paint_select_tool_draw (PikaDrawTool *draw_tool);
static void pika_paint_select_tool_halt (PikaPaintSelectTool *ps_tool);
static void pika_paint_select_tool_update_image_mask (PikaPaintSelectTool *ps_tool,
GeglBuffer *buffer,
gint offset_x,
gint offset_y,
PikaPaintSelectMode mode);
static void pika_paint_select_tool_init_buffers (PikaPaintSelectTool *ps_tool,
PikaImage *image,
PikaDrawable *drawable);
static gboolean pika_paint_select_tool_can_paint (PikaPaintSelectTool *ps_tool,
PikaDisplay *display,
gboolean show_message);
static gboolean pika_paint_select_tool_start (PikaPaintSelectTool *ps_tool,
PikaDisplay *display);
static void pika_paint_select_tool_init_scribble (PikaPaintSelectTool *ps_tool);
static void pika_paint_select_tool_create_graph (PikaPaintSelectTool *ps_tool);
static gboolean pika_paint_select_tool_paint_scribble (PikaPaintSelectTool *ps_tool);
static void pika_paint_select_tool_toggle_scribbles_visibility (PikaPaintSelectTool *ps_tool);
static GeglRectangle pika_paint_select_tool_get_local_region (PikaDisplay *display,
gint brush_x,
gint brush_y,
gint drawable_off_x,
gint drawable_off_y,
gint drawable_width,
gint drawable_height);
static gfloat euclidean_distance (gint x1,
gint y1,
gint x2,
gint y2);
G_DEFINE_TYPE (PikaPaintSelectTool, pika_paint_select_tool,
PIKA_TYPE_DRAW_TOOL)
#define parent_class pika_paint_select_tool_parent_class
void
pika_paint_select_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
if (gegl_has_operation ("gegl:paint-select") &&
PIKA_GUI_CONFIG (PIKA (data)->config)->playground_paint_select_tool)
(* callback) (PIKA_TYPE_PAINT_SELECT_TOOL,
PIKA_TYPE_PAINT_SELECT_OPTIONS,
pika_paint_select_options_gui,
0,
"pika-paint-select-tool",
_("Paint Select"),
_("Paint Select Tool: Select objects by painting roughly"),
N_("P_aint Select"), NULL,
NULL, PIKA_HELP_TOOL_FOREGROUND_SELECT,
PIKA_ICON_TOOL_PAINT_SELECT,
data);
}
static void
pika_paint_select_tool_class_init (PikaPaintSelectToolClass *klass)
{
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
PikaDrawToolClass *draw_tool_class = PIKA_DRAW_TOOL_CLASS (klass);
tool_class->button_press = pika_paint_select_tool_button_press;
tool_class->button_release = pika_paint_select_tool_button_release;
tool_class->control = pika_paint_select_tool_control;
tool_class->cursor_update = pika_paint_select_tool_cursor_update;
tool_class->key_press = pika_paint_select_tool_key_press;
tool_class->modifier_key = pika_paint_select_tool_modifier_key;
tool_class->motion = pika_paint_select_tool_motion;
tool_class->oper_update = pika_paint_select_tool_oper_update;
tool_class->options_notify = pika_paint_select_tool_options_notify;
draw_tool_class->draw = pika_paint_select_tool_draw;
}
static void
pika_paint_select_tool_init (PikaPaintSelectTool *ps_tool)
{
PikaTool *tool = PIKA_TOOL (ps_tool);
pika_tool_control_set_motion_mode (tool->control, PIKA_MOTION_MODE_EXACT);
pika_tool_control_set_scroll_lock (tool->control, FALSE);
pika_tool_control_set_preserve (tool->control, FALSE);
pika_tool_control_set_dirty_mask (tool->control,
PIKA_DIRTY_IMAGE |
PIKA_DIRTY_ACTIVE_DRAWABLE);
pika_tool_control_set_dirty_action (tool->control,
PIKA_TOOL_ACTION_HALT);
pika_tool_control_set_precision (tool->control,
PIKA_CURSOR_PRECISION_SUBPIXEL);
pika_tool_control_set_tool_cursor (tool->control,
PIKA_TOOL_CURSOR_PAINTBRUSH);
pika_tool_control_set_cursor_modifier (tool->control,
PIKA_CURSOR_MODIFIER_PLUS);
pika_tool_control_set_action_pixel_size (tool->control,
"tools-paint-select-pixel-size-set");
/* TODO: the size-set action is not implemented. */
pika_tool_control_set_action_size (tool->control,
"tools-paint-select-size-set");
ps_tool->image_mask = NULL;
ps_tool->trimap = NULL;
ps_tool->drawable = NULL;
ps_tool->scribble = NULL;
ps_tool->graph = NULL;
ps_tool->ps_node = NULL;
ps_tool->render_node = NULL;
}
static void
pika_paint_select_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display)
{
PikaPaintSelectTool *ps_tool = PIKA_PAINT_SELECT_TOOL (tool);
if (tool->display && display != tool->display)
pika_tool_control (tool, PIKA_TOOL_ACTION_HALT, tool->display);
if (! tool->display)
{
if (! pika_paint_select_tool_start (ps_tool, display))
return;
}
g_return_if_fail (g_list_length (tool->drawables) == 1);
ps_tool->last_pos.x = coords->x;
ps_tool->last_pos.y = coords->y;
if (pika_paint_select_tool_paint_scribble (ps_tool))
{
PikaPaintSelectOptions *options = PIKA_PAINT_SELECT_TOOL_GET_OPTIONS (ps_tool);
gint offset_x = ps_tool->last_pos.x - options->stroke_width / 2;
gint offset_y = ps_tool->last_pos.y - options->stroke_width / 2;
pika_paint_select_tool_update_image_mask (ps_tool,
ps_tool->scribble,
offset_x,
offset_y,
options->mode);
}
pika_tool_control_activate (tool->control);
}
static void
pika_paint_select_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
pika_draw_tool_pause (draw_tool);
pika_tool_control_halt (tool->control);
pika_draw_tool_resume (draw_tool);
}
static void
pika_paint_select_tool_control (PikaTool *tool,
PikaToolAction action,
PikaDisplay *display)
{
PikaPaintSelectTool *paint_select = PIKA_PAINT_SELECT_TOOL (tool);
switch (action)
{
case PIKA_TOOL_ACTION_PAUSE:
break;
case PIKA_TOOL_ACTION_RESUME:
break;
case PIKA_TOOL_ACTION_HALT:
pika_paint_select_tool_halt (paint_select);
break;
case PIKA_TOOL_ACTION_COMMIT:
break;
}
PIKA_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
pika_paint_select_tool_cursor_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
PikaDisplay *display)
{
PikaPaintSelectOptions *options = PIKA_PAINT_SELECT_TOOL_GET_OPTIONS (tool);
PikaCursorModifier modifier = PIKA_CURSOR_MODIFIER_NONE;
if (options->mode == PIKA_PAINT_SELECT_MODE_ADD)
{
modifier = PIKA_CURSOR_MODIFIER_PLUS;
}
else
{
modifier = PIKA_CURSOR_MODIFIER_MINUS;
}
pika_tool_control_set_cursor_modifier (tool->control, modifier);
PIKA_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static gboolean
pika_paint_select_tool_can_paint (PikaPaintSelectTool *ps_tool,
PikaDisplay *display,
gboolean show_message)
{
PikaTool *tool = PIKA_TOOL (ps_tool);
PikaGuiConfig *config = PIKA_GUI_CONFIG (display->pika->config);
PikaImage *image = pika_display_get_image (display);
GList *drawables = pika_image_get_selected_drawables (image);
PikaDrawable *drawable;
if (g_list_length (drawables) != 1)
{
if (show_message)
{
if (g_list_length (drawables) > 1)
pika_tool_message_literal (tool, display,
_("Cannot paint select on multiple layers. Select only one layer."));
else
pika_tool_message_literal (tool, display,
_("No active drawables."));
}
g_list_free (drawables);
return FALSE;
}
drawable = drawables->data;
g_list_free (drawables);
if (pika_viewable_get_children (PIKA_VIEWABLE (drawable)))
{
if (show_message)
{
pika_tool_message_literal (tool, display,
_("Cannot paint select on layer groups."));
}
return FALSE;
}
if (! pika_item_is_visible (PIKA_ITEM (drawable)) &&
! config->edit_non_visible)
{
if (show_message)
{
pika_tool_message_literal (tool, display,
_("The active layer is not visible."));
}
return FALSE;
}
return TRUE;
}
static gboolean
pika_paint_select_tool_start (PikaPaintSelectTool *ps_tool,
PikaDisplay *display)
{
PikaTool *tool = PIKA_TOOL (ps_tool);
PikaImage *image = pika_display_get_image (display);
PikaDrawable *drawable;
if (! pika_paint_select_tool_can_paint (ps_tool, display, TRUE))
return FALSE;
tool->display = display;
g_list_free (tool->drawables);
tool->drawables = pika_image_get_selected_drawables (image);
drawable = tool->drawables->data;
pika_paint_select_tool_init_buffers (ps_tool, image, drawable);
pika_paint_select_tool_create_graph (ps_tool);
if (! pika_draw_tool_is_active (PIKA_DRAW_TOOL (ps_tool)))
pika_draw_tool_start (PIKA_DRAW_TOOL (ps_tool), display);
return TRUE;
}
static gboolean
pika_paint_select_tool_key_press (PikaTool *tool,
GdkEventKey *kevent,
PikaDisplay *display)
{
return PIKA_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
}
static void
pika_paint_select_tool_modifier_key (PikaTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
PikaDisplay *display)
{
}
static void
pika_paint_select_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaPaintSelectTool *ps_tool = PIKA_PAINT_SELECT_TOOL (tool);
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
static guint32 last_time = 0;
PIKA_TOOL_CLASS (parent_class)->motion (tool, coords, time, state, display);
/* don't let the events come in too fast, ignore below a delay of 100 ms */
if (time - last_time < 100)
return;
last_time = time;
if (state & GDK_BUTTON1_MASK)
{
gfloat distance = euclidean_distance (coords->x,
coords->y,
ps_tool->last_pos.x,
ps_tool->last_pos.y);
if (distance >= 2.f)
{
pika_draw_tool_pause (draw_tool);
pika_tool_control_halt (tool->control);
ps_tool->last_pos.x = coords->x;
ps_tool->last_pos.y = coords->y;
if (pika_paint_select_tool_paint_scribble (ps_tool))
{
PikaPaintSelectOptions *options = PIKA_PAINT_SELECT_TOOL_GET_OPTIONS (ps_tool);
GeglRectangle local_region;
GeglBuffer *result;
GTimer *timer;
local_region = pika_paint_select_tool_get_local_region (display,
coords->x, coords->y,
ps_tool->drawable_off_x,
ps_tool->drawable_off_y,
ps_tool->drawable_width,
ps_tool->drawable_height);
if (options->mode == PIKA_PAINT_SELECT_MODE_ADD)
{
gegl_node_set (ps_tool->ps_node, "mode", 0, NULL);
gegl_node_set (ps_tool->threshold_node, "value", 0.99, NULL);
}
else
{
gegl_node_set (ps_tool->ps_node, "mode", 1, NULL);
gegl_node_set (ps_tool->threshold_node, "value", 0.01, NULL);
}
if (local_region.width < ps_tool->drawable_width ||
local_region.height < ps_tool->drawable_height)
{
gegl_node_set (ps_tool->ps_node,
"use_local_region", TRUE,
"region_x", local_region.x,
"region_y", local_region.y,
"region_width", local_region.width,
"region_height", local_region.height,
NULL);
}
else
{
gegl_node_set (ps_tool->ps_node,
"use_local_region", FALSE, NULL);
}
gegl_node_set (ps_tool->render_node, "buffer", &result, NULL);
timer = g_timer_new ();;
gegl_node_process (ps_tool->render_node);
g_timer_stop (timer);
g_printerr ("processing graph takes %.3f s\n\n", g_timer_elapsed (timer, NULL));
g_timer_destroy (timer);
pika_paint_select_tool_update_image_mask (ps_tool,
result,
ps_tool->drawable_off_x,
ps_tool->drawable_off_y,
options->mode);
g_object_unref (result);
}
pika_tool_control_activate (tool->control);
pika_draw_tool_resume (draw_tool);
}
}
}
static void
pika_paint_select_tool_oper_update (PikaTool *tool,
const PikaCoords *coords,
GdkModifierType state,
gboolean proximity,
PikaDisplay *display)
{
PikaPaintSelectTool *ps = PIKA_PAINT_SELECT_TOOL (tool);
PikaDrawTool *draw_tool = PIKA_DRAW_TOOL (tool);
if (proximity)
{
pika_draw_tool_pause (draw_tool);
if (! tool->display || display == tool->display)
{
ps->last_pos.x = coords->x;
ps->last_pos.y = coords->y;
}
if (! pika_draw_tool_is_active (draw_tool))
pika_draw_tool_start (draw_tool, display);
pika_draw_tool_resume (draw_tool);
}
else if (pika_draw_tool_is_active (draw_tool))
{
pika_draw_tool_stop (draw_tool);
}
}
static void
pika_paint_select_tool_draw (PikaDrawTool *draw_tool)
{
PikaPaintSelectTool *paint_select = PIKA_PAINT_SELECT_TOOL (draw_tool);
PikaPaintSelectOptions *options = PIKA_PAINT_SELECT_TOOL_GET_OPTIONS (paint_select);
gint size = options->stroke_width;
pika_draw_tool_add_arc (draw_tool,
FALSE,
paint_select->last_pos.x - (size / 2.0),
paint_select->last_pos.y - (size / 2.0),
size, size,
0.0, (2.0 * G_PI));
}
static void
pika_paint_select_tool_options_notify (PikaTool *tool,
PikaToolOptions *options,
const GParamSpec *pspec)
{
PikaPaintSelectTool *ps_tool = PIKA_PAINT_SELECT_TOOL (tool);
if (g_strcmp0 (pspec->name, "stroke-width") == 0)
{
/* This triggers a redraw of the tool pointer, especially useful
* here when we change the pen size with on-canvas interaction.
*/
pika_draw_tool_pause (PIKA_DRAW_TOOL (tool));
pika_draw_tool_resume (PIKA_DRAW_TOOL (tool));
}
if (! tool->display)
return;
if (! strcmp (pspec->name, "stroke-width") && ps_tool->scribble)
{
g_object_unref (ps_tool->scribble);
ps_tool->scribble = NULL;
}
else if (! strcmp (pspec->name, "show-scribbles"))
{
pika_paint_select_tool_toggle_scribbles_visibility (ps_tool);
}
}
static void
pika_paint_select_tool_halt (PikaPaintSelectTool *ps_tool)
{
PikaTool *tool = PIKA_TOOL (ps_tool);
g_clear_object (&ps_tool->trimap);
g_clear_object (&ps_tool->graph);
g_clear_object (&ps_tool->scribble);
ps_tool->drawable = NULL;
ps_tool->render_node = NULL;
ps_tool->ps_node = NULL;
ps_tool->image_mask = NULL;
if (tool->display)
{
pika_display_shell_set_mask (pika_display_get_shell (tool->display),
NULL, 0, 0, NULL, FALSE);
pika_image_flush (pika_display_get_image (tool->display));
}
tool->display = NULL;
g_list_free (tool->drawables);
tool->drawables = NULL;
}
static void
pika_paint_select_tool_update_image_mask (PikaPaintSelectTool *ps_tool,
GeglBuffer *buffer,
gint offset_x,
gint offset_y,
PikaPaintSelectMode mode)
{
PikaTool *tool = PIKA_TOOL (ps_tool);
PikaChannelOps op;
if (tool->display)
{
PikaImage *image = pika_display_get_image (tool->display);
if (mode == PIKA_PAINT_SELECT_MODE_ADD)
op = PIKA_CHANNEL_OP_ADD;
else
op = PIKA_CHANNEL_OP_SUBTRACT;
pika_channel_select_buffer (pika_image_get_mask (image),
C_("command", "Paint Select"),
buffer,
offset_x,
offset_y,
op,
FALSE,
0,
0);
pika_image_flush (image);
}
}
static void
pika_paint_select_tool_init_buffers (PikaPaintSelectTool *ps_tool,
PikaImage *image,
PikaDrawable *drawable)
{
PikaChannel *channel;
GeglColor *grey = gegl_color_new ("#888");
g_return_if_fail (ps_tool->trimap == NULL);
g_return_if_fail (ps_tool->drawable == NULL);
pika_item_get_offset (PIKA_ITEM (drawable),
&ps_tool->drawable_off_x,
&ps_tool->drawable_off_y);
ps_tool->drawable_width = pika_item_get_width (PIKA_ITEM (drawable));
ps_tool->drawable_height = pika_item_get_height (PIKA_ITEM (drawable));
ps_tool->drawable = pika_drawable_get_buffer (drawable);
channel = pika_image_get_mask (image);
ps_tool->image_mask = pika_drawable_get_buffer (PIKA_DRAWABLE (channel));
ps_tool->trimap = gegl_buffer_new (gegl_buffer_get_extent (ps_tool->drawable),
babl_format ("Y float"));
gegl_buffer_set_color (ps_tool->trimap, NULL, grey);
g_object_unref (grey);
}
static void
pika_paint_select_tool_init_scribble (PikaPaintSelectTool *ps_tool)
{
PikaPaintSelectOptions *options = PIKA_PAINT_SELECT_TOOL_GET_OPTIONS (ps_tool);
PikaScanConvert *scan_convert;
PikaVector2 points[2];
gint size = options->stroke_width;
gint radius = size / 2;
GeglRectangle square = {0, 0, size, size};
if (ps_tool->scribble)
g_object_unref (ps_tool->scribble);
ps_tool->scribble = gegl_buffer_linear_new (&square, babl_format ("Y float"));
points[0].x = points[1].x = radius;
points[0].y = points[1].y = radius;
points[1].x += 0.01;
points[1].y += 0.01;
scan_convert = pika_scan_convert_new ();
pika_scan_convert_add_polyline (scan_convert, 2, points, FALSE);
pika_scan_convert_stroke (scan_convert, size,
PIKA_JOIN_ROUND, PIKA_CAP_ROUND, 10.0,
0.0, NULL);
pika_scan_convert_compose (scan_convert, ps_tool->scribble, 0, 0);
pika_scan_convert_free (scan_convert);
}
static gboolean
pika_paint_select_tool_paint_scribble (PikaPaintSelectTool *ps_tool)
{
PikaPaintSelectOptions *options = PIKA_PAINT_SELECT_TOOL_GET_OPTIONS (ps_tool);
gint size = options->stroke_width;
gint radius = size / 2;
GeglRectangle trimap_area;
GeglRectangle mask_area;
GeglBufferIterator *iter;
gfloat scribble_value;
gboolean overlap = FALSE;
if (! ps_tool->scribble)
{
pika_paint_select_tool_init_scribble (ps_tool);
}
/* add the scribble to the trimap buffer and check the image mask to see if
an optimization should be triggered.
*/
if (options->mode == PIKA_PAINT_SELECT_MODE_ADD)
{
scribble_value = 1.f;
}
else
{
scribble_value = 0.f;
}
iter = gegl_buffer_iterator_new (ps_tool->scribble, NULL, 0,
babl_format ("Y float"),
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 3);
mask_area = *gegl_buffer_get_extent (ps_tool->scribble);
mask_area.x = ps_tool->last_pos.x - radius;
mask_area.y = ps_tool->last_pos.y - radius;
gegl_rectangle_copy (&trimap_area, &mask_area);
trimap_area.x = mask_area.x - ps_tool->drawable_off_x;
trimap_area.y = mask_area.y - ps_tool->drawable_off_y;
gegl_buffer_iterator_add (iter, ps_tool->trimap, &trimap_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
gegl_buffer_iterator_add (iter, ps_tool->image_mask, &mask_area, 0,
babl_format ("Y float"),
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
gfloat *scribble_pix = iter->items[0].data;
gfloat *trimap_pix = iter->items[1].data;
gfloat *mask_pix = iter->items[2].data;
gint n_pixels = iter->length;
while (n_pixels--)
{
if (*scribble_pix)
{
*trimap_pix = scribble_value;
if (*mask_pix != scribble_value)
overlap = TRUE;
}
scribble_pix++;
trimap_pix++;
mask_pix++;
}
}
pika_paint_select_tool_toggle_scribbles_visibility (ps_tool);
return overlap;
}
static void
pika_paint_select_tool_create_graph (PikaPaintSelectTool *ps_tool)
{
GeglNode *t; /* trimap */
GeglNode *m; /* mask */
GeglNode *d; /* drawable */
GeglNode *crop;
GeglNode *translate = NULL;
ps_tool->graph = gegl_node_new ();
m = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:buffer-source",
"buffer", ps_tool->image_mask,
NULL);
crop = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:crop",
"x", (gdouble) ps_tool->drawable_off_x,
"y", (gdouble) ps_tool->drawable_off_y,
"width", (gdouble) gegl_buffer_get_width (ps_tool->drawable),
"height", (gdouble) gegl_buffer_get_height (ps_tool->drawable),
NULL);
ps_tool->threshold_node = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:threshold",
NULL);
if (ps_tool->drawable_off_x || ps_tool->drawable_off_y)
{
translate = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:translate",
"x", -1.0 * ps_tool->drawable_off_x,
"y", -1.0 * ps_tool->drawable_off_y,
NULL);
}
d = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:buffer-source",
"buffer", ps_tool->drawable,
NULL);
t = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:buffer-source",
"buffer", ps_tool->trimap,
NULL);
ps_tool->ps_node = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:paint-select",
NULL);
ps_tool->render_node = gegl_node_new_child (ps_tool->graph,
"operation", "gegl:buffer-sink",
NULL);
gegl_node_link_many (m, ps_tool->threshold_node, crop, NULL);
if (translate)
gegl_node_link_many (crop, translate, ps_tool->ps_node, ps_tool->render_node, NULL);
else
gegl_node_link_many (crop, ps_tool->ps_node, ps_tool->render_node, NULL);
gegl_node_connect (d, "output", ps_tool->ps_node, "aux");
gegl_node_connect (t, "output", ps_tool->ps_node, "aux2");
}
static void
pika_paint_select_tool_toggle_scribbles_visibility (PikaPaintSelectTool *ps_tool)
{
PikaTool *tool = PIKA_TOOL (ps_tool);
PikaPaintSelectOptions *options = PIKA_PAINT_SELECT_TOOL_GET_OPTIONS (tool);
if (options->show_scribbles)
{
const PikaRGB black = {0.0, 0.0, 0.0, 1.0};
pika_display_shell_set_mask (pika_display_get_shell (tool->display),
ps_tool->trimap,
ps_tool->drawable_off_x,
ps_tool->drawable_off_y,
&black,
TRUE);
}
else
{
pika_display_shell_set_mask (pika_display_get_shell (tool->display),
NULL, 0, 0, NULL, FALSE);
}
}
static GeglRectangle
pika_paint_select_tool_get_local_region (PikaDisplay *display,
gint brush_x,
gint brush_y,
gint drawable_off_x,
gint drawable_off_y,
gint drawable_width,
gint drawable_height)
{
PikaDisplayShell *shell;
GeglRectangle brush_window;
GeglRectangle drawable_region;
GeglRectangle viewport;
GeglRectangle local_region;
gdouble x, y, w, h;
shell = pika_display_get_shell (display);
pika_display_shell_scroll_get_viewport (shell, &x, &y, &w, &h);
viewport.x = (gint) x;
viewport.y = (gint) y;
viewport.width = (gint) w;
viewport.height = (gint) h;
brush_window.x = brush_x - viewport.width / 2;
brush_window.y = brush_y - viewport.height / 2;
brush_window.width = viewport.width;
brush_window.height = viewport.height;
gegl_rectangle_bounding_box (&local_region, &brush_window, &viewport);
drawable_region.x = drawable_off_x;
drawable_region.y = drawable_off_y;
drawable_region.width = drawable_width;
drawable_region.height = drawable_height;
gegl_rectangle_intersect (&local_region, &local_region, &drawable_region);
local_region.x -= drawable_off_x;
local_region.y -= drawable_off_y;
g_printerr ("local region: (%d,%d) %d x %d\n",
local_region.x, local_region.y,
local_region.width, local_region.height);
return local_region;
}
static gfloat
euclidean_distance (gint x1,
gint y1,
gint x2,
gint y2)
{
return sqrtf ((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}
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