PIKApp/app/tools/pikabrightnesscontrasttool.c

324 lines
12 KiB
C
Raw Permalink Normal View History

2023-09-26 00:35:21 +02:00
/* 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
*
* 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 <gegl.h>
#include <gtk/gtk.h>
#include "libpikaconfig/pikaconfig.h"
#include "libpikawidgets/pikawidgets.h"
#include "tools-types.h"
#include "operations/pikabrightnesscontrastconfig.h"
#include "core/pikadrawable.h"
#include "core/pikaerror.h"
#include "core/pikaimage.h"
#include "widgets/pikahelp-ids.h"
#include "widgets/pikapropwidgets.h"
#include "widgets/pikawidgets-constructors.h"
#include "display/pikadisplay.h"
#include "pikabrightnesscontrasttool.h"
#include "pikafilteroptions.h"
#include "pikatoolcontrol.h"
#include "pika-intl.h"
#define SLIDER_WIDTH 200
static gboolean pika_brightness_contrast_tool_initialize (PikaTool *tool,
PikaDisplay *display,
GError **error);
static void pika_brightness_contrast_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display);
static void pika_brightness_contrast_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display);
static void pika_brightness_contrast_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display);
static gchar *
pika_brightness_contrast_tool_get_operation (PikaFilterTool *filter_tool,
gchar **description);
static void pika_brightness_contrast_tool_dialog (PikaFilterTool *filter_tool);
static void brightness_contrast_to_levels_callback (GtkWidget *widget,
PikaFilterTool *filter_tool);
G_DEFINE_TYPE (PikaBrightnessContrastTool, pika_brightness_contrast_tool,
PIKA_TYPE_FILTER_TOOL)
#define parent_class pika_brightness_contrast_tool_parent_class
void
pika_brightness_contrast_tool_register (PikaToolRegisterCallback callback,
gpointer data)
{
(* callback) (PIKA_TYPE_BRIGHTNESS_CONTRAST_TOOL,
PIKA_TYPE_FILTER_OPTIONS, NULL,
0,
"pika-brightness-contrast-tool",
_("Brightness-Contrast"),
_("Adjust brightness and contrast"),
N_("B_rightness-Contrast..."), NULL,
NULL, PIKA_HELP_TOOL_BRIGHTNESS_CONTRAST,
PIKA_ICON_TOOL_BRIGHTNESS_CONTRAST,
data);
}
static void
pika_brightness_contrast_tool_class_init (PikaBrightnessContrastToolClass *klass)
{
PikaToolClass *tool_class = PIKA_TOOL_CLASS (klass);
PikaFilterToolClass *filter_tool_class = PIKA_FILTER_TOOL_CLASS (klass);
tool_class->initialize = pika_brightness_contrast_tool_initialize;
tool_class->button_press = pika_brightness_contrast_tool_button_press;
tool_class->button_release = pika_brightness_contrast_tool_button_release;
tool_class->motion = pika_brightness_contrast_tool_motion;
filter_tool_class->get_operation = pika_brightness_contrast_tool_get_operation;
filter_tool_class->dialog = pika_brightness_contrast_tool_dialog;
}
static void
pika_brightness_contrast_tool_init (PikaBrightnessContrastTool *bc_tool)
{
}
static gboolean
pika_brightness_contrast_tool_initialize (PikaTool *tool,
PikaDisplay *display,
GError **error)
{
PikaBrightnessContrastTool *bc_tool = PIKA_BRIGHTNESS_CONTRAST_TOOL (tool);
PikaImage *image = pika_display_get_image (display);
GList *drawables;
if (! PIKA_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
drawables = pika_image_get_selected_drawables (image);
/* Single drawable selection has been checked in parent initialize(). */
g_return_val_if_fail (g_list_length (drawables) == 1, FALSE);
if (pika_drawable_get_component_type (drawables->data) == PIKA_COMPONENT_TYPE_U8)
{
pika_prop_widget_set_factor (bc_tool->brightness_scale,
127.0, 1.0, 8.0, 0);
pika_prop_widget_set_factor (bc_tool->contrast_scale,
127.0, 1.0, 8.0, 0);
}
else
{
pika_prop_widget_set_factor (bc_tool->brightness_scale,
0.5, 0.01, 0.1, 3);
pika_prop_widget_set_factor (bc_tool->contrast_scale,
0.5, 0.01, 0.1, 3);
}
g_list_free (drawables);
return TRUE;
}
static gchar *
pika_brightness_contrast_tool_get_operation (PikaFilterTool *filter_tool,
gchar **description)
{
*description = g_strdup (_("Adjust Brightness and Contrast"));
return g_strdup ("pika:brightness-contrast");
}
static void
pika_brightness_contrast_tool_button_press (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonPressType press_type,
PikaDisplay *display)
{
PikaBrightnessContrastTool *bc_tool = PIKA_BRIGHTNESS_CONTRAST_TOOL (tool);
bc_tool->dragging = ! pika_filter_tool_on_guide (PIKA_FILTER_TOOL (tool),
coords, display);
if (! bc_tool->dragging)
{
PIKA_TOOL_CLASS (parent_class)->button_press (tool, coords, time, state,
press_type, display);
}
else
{
gdouble brightness;
gdouble contrast;
g_object_get (PIKA_FILTER_TOOL (tool)->config,
"brightness", &brightness,
"contrast", &contrast,
NULL);
bc_tool->x = coords->x - contrast * 127.0;
bc_tool->y = coords->y + brightness * 127.0;
bc_tool->dx = contrast * 127.0;
bc_tool->dy = - brightness * 127.0;
tool->display = display;
pika_tool_control_activate (tool->control);
}
}
static void
pika_brightness_contrast_tool_button_release (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaButtonReleaseType release_type,
PikaDisplay *display)
{
PikaBrightnessContrastTool *bc_tool = PIKA_BRIGHTNESS_CONTRAST_TOOL (tool);
if (! bc_tool->dragging)
{
PIKA_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
release_type, display);
}
else
{
pika_tool_control_halt (tool->control);
bc_tool->dragging = FALSE;
if (bc_tool->dx == 0 && bc_tool->dy == 0)
return;
if (release_type == PIKA_BUTTON_RELEASE_CANCEL)
pika_config_reset (PIKA_CONFIG (PIKA_FILTER_TOOL (tool)->config));
}
}
static void
pika_brightness_contrast_tool_motion (PikaTool *tool,
const PikaCoords *coords,
guint32 time,
GdkModifierType state,
PikaDisplay *display)
{
PikaBrightnessContrastTool *bc_tool = PIKA_BRIGHTNESS_CONTRAST_TOOL (tool);
if (! bc_tool->dragging)
{
PIKA_TOOL_CLASS (parent_class)->motion (tool, coords, time, state,
display);
}
else
{
bc_tool->dx = (coords->x - bc_tool->x);
bc_tool->dy = - (coords->y - bc_tool->y);
g_object_set (PIKA_FILTER_TOOL (tool)->config,
"brightness", CLAMP (bc_tool->dy, -127.0, 127.0) / 127.0,
"contrast", CLAMP (bc_tool->dx, -127.0, 127.0) / 127.0,
NULL);
}
}
/********************************/
/* Brightness Contrast dialog */
/********************************/
static void
pika_brightness_contrast_tool_dialog (PikaFilterTool *filter_tool)
{
PikaBrightnessContrastTool *bc_tool = PIKA_BRIGHTNESS_CONTRAST_TOOL (filter_tool);
GtkWidget *main_vbox;
GtkWidget *scale;
GtkWidget *button;
main_vbox = pika_filter_tool_dialog_get_vbox (filter_tool);
/* Create the brightness scale widget */
scale = pika_prop_spin_scale_new (filter_tool->config, "brightness",
0.01, 0.1, 3);
pika_spin_scale_set_label (PIKA_SPIN_SCALE (scale), _("_Brightness"));
gtk_box_pack_start (GTK_BOX (main_vbox), scale, FALSE, FALSE, 0);
bc_tool->brightness_scale = scale;
/* Create the contrast scale widget */
scale = pika_prop_spin_scale_new (filter_tool->config, "contrast",
0.01, 0.1, 3);
pika_spin_scale_set_label (PIKA_SPIN_SCALE (scale), _("_Contrast"));
gtk_box_pack_start (GTK_BOX (main_vbox), scale, FALSE, FALSE, 0);
bc_tool->contrast_scale = scale;
button = pika_icon_button_new (PIKA_ICON_TOOL_LEVELS,
_("Edit these Settings as Levels"));
gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (brightness_contrast_to_levels_callback),
filter_tool);
}
static void
brightness_contrast_to_levels_callback (GtkWidget *widget,
PikaFilterTool *filter_tool)
{
PikaLevelsConfig *levels;
levels = pika_brightness_contrast_config_to_levels_config (PIKA_BRIGHTNESS_CONTRAST_CONFIG (filter_tool->config));
pika_filter_tool_edit_as (filter_tool,
"pika-levels-tool",
PIKA_CONFIG (levels));
g_object_unref (levels);
}