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app: add custom gui for gegl:color-to-alpha(-plus) 

Add a specialized propgui constructor for gegl:color-to-alpha-plus.
This op is currently in the workshop, but is set to be merged with
the existing gegl:color-to-alpha, so we omit the '-plus' from file-
and function-names.

The new op adds a pair of properties to control the radii, relative
to the selected color, below which colors become fully transparent,
and above which colors remain fully opaque.  Allow these properties
to be set by picking a color from the image, and calculating the
radius accordingly.
This commit is contained in:
Ell 2017-10-16 11:47:43 -04:00
parent c5b88702e6
commit d4d8dbbc1b
5 changed files with 189 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
app/propgui/Makefile.am
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@ -25,6 +25,8 @@ libapppropgui_a_SOURCES = \
gimppropgui-color-balance.h \
gimppropgui-color-rotate.c \
gimppropgui-color-rotate.h \
gimppropgui-color-to-alpha.c \
gimppropgui-color-to-alpha.h \
gimppropgui-convolution-matrix.c \
gimppropgui-convolution-matrix.h \
gimppropgui-diffraction-patterns.c \

148
app/propgui/gimppropgui-color-to-alpha.c Normal file
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@ -0,0 +1,148 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimppropgui-color-to-alpha.c
* Copyright (C) 2017 Ell
*
* 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 "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "propgui-types.h"
#include "core/gimpcontext.h"
#include "gimppropgui.h"
#include "gimppropgui-color-to-alpha.h"
#include "gimppropgui-generic.h"
#include "gimp-intl.h"
static void
threshold_picked (GObject *config,
gpointer identifier,
gdouble x,
gdouble y,
const Babl *sample_format,
const GimpRGB *color)
{
GimpRGB *bg_color;
gdouble radius = 0.0;
gdouble target_radius = 0.0;
gdouble threshold;
g_object_get (config,
"color", &bg_color,
NULL);
radius = MAX (radius, MAX (bg_color->r, 1.0 - bg_color->r));
radius = MAX (radius, MAX (bg_color->g, 1.0 - bg_color->g));
radius = MAX (radius, MAX (bg_color->b, 1.0 - bg_color->b));
target_radius = MAX (target_radius, fabs (color->r - bg_color->r));
target_radius = MAX (target_radius, fabs (color->g - bg_color->g));
target_radius = MAX (target_radius, fabs (color->b - bg_color->b));
threshold = target_radius / radius;
g_object_set (config,
identifier, threshold,
NULL);
g_free (bg_color);
}
GtkWidget *
_gimp_prop_gui_new_color_to_alpha (GObject *config,
GParamSpec **param_specs,
guint n_param_specs,
GeglRectangle *area,
GimpContext *context,
GimpCreatePickerFunc create_picker_func,
GimpCreateControllerFunc create_controller_func,
gpointer creator)
{
GtkWidget *vbox;
GtkWidget *button;
GtkWidget *hbox;
GtkWidget *scale;
const gchar *label;
g_return_val_if_fail (G_IS_OBJECT (config), NULL);
g_return_val_if_fail (param_specs != NULL, NULL);
g_return_val_if_fail (n_param_specs > 0, NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
button = _gimp_prop_gui_new_generic (config, param_specs, 1,
area, context, create_picker_func, NULL,
creator);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
scale = gimp_prop_widget_new (config, "transparency-threshold",
area, context, NULL, NULL, NULL, &label);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_widget_show (scale);
if (create_picker_func)
{
button = create_picker_func (creator,
"transparency-threshold",
GIMP_ICON_COLOR_PICKER_GRAY,
_("Pick farthest full-transparency color"),
/* pick_abyss = */ FALSE,
(GimpPickerCallback) threshold_picked,
config);
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
}
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
scale = gimp_prop_widget_new (config, "opacity-threshold",
area, context, NULL, NULL, NULL, &label);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_widget_show (scale);
if (create_picker_func)
{
button = create_picker_func (creator,
"opacity-threshold",
GIMP_ICON_COLOR_PICKER_GRAY,
_("Pick nearest full-opacity color"),
/* pick_abyss = */ FALSE,
(GimpPickerCallback) threshold_picked,
config);
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
}
return vbox;
}

35
app/propgui/gimppropgui-color-to-alpha.h Normal file
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@ -0,0 +1,35 @@
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimppropgui-color-to-alpha.h
*
* 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/>.
*/
#ifndef __GIMP_PROP_GUI_COLOR_TO_ALPHA_H__
#define __GIMP_PROP_GUI_COLOR_TO_ALPHA_H__
GtkWidget *
_gimp_prop_gui_new_color_to_alpha (GObject *config,
GParamSpec **param_specs,
guint n_param_specs,
GeglRectangle *area,
GimpContext *context,
GimpCreatePickerFunc create_picker_func,
GimpCreateControllerFunc create_controller_func,
gpointer creator);
#endif /* __GIMP_PROP_GUI_COLOR_TO_ALPHA_H__ */

3
app/propgui/gimppropgui.c
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@ -48,6 +48,7 @@
#include "gimppropgui-channel-mixer.h"
#include "gimppropgui-color-balance.h"
#include "gimppropgui-color-rotate.h"
#include "gimppropgui-color-to-alpha.h"
#include "gimppropgui-convolution-matrix.h"
#include "gimppropgui-diffraction-patterns.h"
#include "gimppropgui-eval.h"
@ -435,6 +436,8 @@ gui_new_funcs[] =
_gimp_prop_gui_new_hue_saturation },
{ "GimpGegl-gegl-color-rotate-config",
_gimp_prop_gui_new_color_rotate },
{ "GimpGegl-gegl-color-to-alpha-plus-config",
_gimp_prop_gui_new_color_to_alpha },
{ "GimpGegl-gegl-convolution-matrix-config",
_gimp_prop_gui_new_convolution_matrix },
{ "GimpGegl-gegl-channel-mixer-config",

1
po/POTFILES.in
View File

@ -372,6 +372,7 @@ app/plug-in/plug-in-rc.c
app/propgui/gimppropgui-channel-mixer.c
app/propgui/gimppropgui-color-balance.c
app/propgui/gimppropgui-color-rotate.c
app/propgui/gimppropgui-color-to-alpha.c
app/propgui/gimppropgui-convolution-matrix.c
app/propgui/gimppropgui-diffraction-patterns.c
app/propgui/gimppropgui-generic.c