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gimp/app/tools/gimpbrightnesscontrasttool.c

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/* The GIMP -- an image manipulation program
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/gimplut.h"
#include "base/lut-funcs.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimpimagemap.h"
#include "widgets/gimphelp-ids.h"
#include "display/gimpdisplay.h"
#include "gimpbrightnesscontrasttool.h"
#include "gimpimagemapoptions.h"
#include "gimp-intl.h"
#define SLIDER_WIDTH 200
#define BRIGHTNESS 0x1
#define CONTRAST 0x2
#define ALL (BRIGHTNESS | CONTRAST)
static void gimp_brightness_contrast_tool_class_init (GimpBrightnessContrastToolClass *klass);
static void gimp_brightness_contrast_tool_init (GimpBrightnessContrastTool *bc_tool);
static void gimp_brightness_contrast_tool_finalize (GObject *object);
static gboolean gimp_brightness_contrast_tool_initialize (GimpTool *tool,
GimpDisplay *gdisp);
static void gimp_brightness_contrast_tool_map (GimpImageMapTool *image_map_tool);
static void gimp_brightness_contrast_tool_dialog (GimpImageMapTool *image_map_tool);
static void gimp_brightness_contrast_tool_reset (GimpImageMapTool *image_map_tool);
static void brightness_contrast_update (GimpBrightnessContrastTool *bc_tool,
gint update);
static void brightness_contrast_brightness_adjustment_update (GtkAdjustment *adj,
gpointer data);
static void brightness_contrast_contrast_adjustment_update (GtkAdjustment *adj,
gpointer data);
static GimpImageMapToolClass *parent_class = NULL;
/* functions */
void
gimp_brightness_contrast_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_BRIGHTNESS_CONTRAST_TOOL,
GIMP_TYPE_IMAGE_MAP_OPTIONS, NULL,
0,
"gimp-brightness-contrast-tool",
_("Brightness-Contrast"),
_("Adjust brightness and contrast"),
N_("B_rightness-Contrast..."), NULL,
NULL, GIMP_HELP_TOOL_BRIGHTNESS_CONTRAST,
GIMP_STOCK_TOOL_BRIGHTNESS_CONTRAST,
data);
}
GType
gimp_brightness_contrast_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpBrightnessContrastToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_brightness_contrast_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpBrightnessContrastTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_brightness_contrast_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_IMAGE_MAP_TOOL,
"GimpBrightnessContrastTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_brightness_contrast_tool_class_init (GimpBrightnessContrastToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
GimpImageMapToolClass *image_map_tool_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
image_map_tool_class = GIMP_IMAGE_MAP_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_brightness_contrast_tool_finalize;
tool_class->initialize = gimp_brightness_contrast_tool_initialize;
image_map_tool_class->shell_desc = _("Adjust Brightness and Contrast");
image_map_tool_class->map = gimp_brightness_contrast_tool_map;
image_map_tool_class->dialog = gimp_brightness_contrast_tool_dialog;
image_map_tool_class->reset = gimp_brightness_contrast_tool_reset;
}
static void
gimp_brightness_contrast_tool_init (GimpBrightnessContrastTool *bc_tool)
{
bc_tool->brightness = 0.0;
bc_tool->contrast = 0.0;
bc_tool->lut = gimp_lut_new ();
}
static void
gimp_brightness_contrast_tool_finalize (GObject *object)
{
GimpBrightnessContrastTool *bc_tool = GIMP_BRIGHTNESS_CONTRAST_TOOL (object);
if (bc_tool->lut)
{
gimp_lut_free (bc_tool->lut);
bc_tool->lut = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_brightness_contrast_tool_initialize (GimpTool *tool,
GimpDisplay *gdisp)
{
GimpBrightnessContrastTool *bc_tool = GIMP_BRIGHTNESS_CONTRAST_TOOL (tool);
GimpDrawable *drawable;
drawable = gimp_image_active_drawable (gdisp->gimage);
if (! drawable)
return FALSE;
if (gimp_drawable_is_indexed (drawable))
{
g_message (_("Brightness-Contrast does not operate on indexed layers."));
return FALSE;
}
bc_tool->brightness = 0.0;
bc_tool->contrast = 0.0;
GIMP_TOOL_CLASS (parent_class)->initialize (tool, gdisp);
brightness_contrast_update (bc_tool, ALL);
return TRUE;
}
static void
gimp_brightness_contrast_tool_map (GimpImageMapTool *image_map_tool)
{
GimpBrightnessContrastTool *bc_tool;
bc_tool = GIMP_BRIGHTNESS_CONTRAST_TOOL (image_map_tool);
brightness_contrast_lut_setup (bc_tool->lut,
bc_tool->brightness / 255.0,
bc_tool->contrast / 127.0,
gimp_drawable_bytes (image_map_tool->drawable));
gimp_image_map_apply (image_map_tool->image_map,
(GimpImageMapApplyFunc) gimp_lut_process_2,
bc_tool->lut);
}
/********************************/
/* Brightness Contrast dialog */
/********************************/
static void
gimp_brightness_contrast_tool_dialog (GimpImageMapTool *image_map_tool)
{
GimpBrightnessContrastTool *bc_tool;
GtkWidget *table;
GtkWidget *slider;
GtkObject *data;
bc_tool = GIMP_BRIGHTNESS_CONTRAST_TOOL (image_map_tool);
/* The table containing sliders */
table = gtk_table_new (2, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 2);
gtk_box_pack_start (GTK_BOX (image_map_tool->main_vbox), table,
FALSE, FALSE, 0);
gtk_widget_show (table);
/* Create the brightness scale widget */
data = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("_Brightness:"), SLIDER_WIDTH, -1,
bc_tool->brightness,
-127.0, 127.0, 1.0, 10.0, 0,
TRUE, 0.0, 0.0,
NULL, NULL);
bc_tool->brightness_data = GTK_ADJUSTMENT (data);
slider = GIMP_SCALE_ENTRY_SCALE (data);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
g_signal_connect (data, "value_changed",
G_CALLBACK (brightness_contrast_brightness_adjustment_update),
bc_tool);
/* Create the contrast scale widget */
data = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("Con_trast:"), SLIDER_WIDTH, -1,
bc_tool->contrast,
-127.0, 127.0, 1.0, 10.0, 0,
TRUE, 0.0, 0.0,
NULL, NULL);
bc_tool->contrast_data = GTK_ADJUSTMENT (data);
slider = GIMP_SCALE_ENTRY_SCALE (data);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
g_signal_connect (data, "value_changed",
G_CALLBACK (brightness_contrast_contrast_adjustment_update),
bc_tool);
}
static void
gimp_brightness_contrast_tool_reset (GimpImageMapTool *image_map_tool)
{
GimpBrightnessContrastTool *bc_tool;
bc_tool = GIMP_BRIGHTNESS_CONTRAST_TOOL (image_map_tool);
bc_tool->brightness = 0.0;
bc_tool->contrast = 0.0;
brightness_contrast_update (bc_tool, ALL);
}
static void
brightness_contrast_update (GimpBrightnessContrastTool *bc_tool,
gint update)
{
if (update & BRIGHTNESS)
gtk_adjustment_set_value (bc_tool->brightness_data, bc_tool->brightness);
if (update & CONTRAST)
gtk_adjustment_set_value (bc_tool->contrast_data, bc_tool->contrast);
}
static void
brightness_contrast_brightness_adjustment_update (GtkAdjustment *adjustment,
gpointer data)
{
GimpBrightnessContrastTool *bc_tool;
bc_tool = GIMP_BRIGHTNESS_CONTRAST_TOOL (data);
if (bc_tool->brightness != adjustment->value)
{
bc_tool->brightness = adjustment->value;
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (bc_tool));
}
}
static void
brightness_contrast_contrast_adjustment_update (GtkAdjustment *adjustment,
gpointer data)
{
GimpBrightnessContrastTool *bc_tool;
bc_tool = GIMP_BRIGHTNESS_CONTRAST_TOOL (data);
if (bc_tool->contrast != adjustment->value)
{
bc_tool->contrast = adjustment->value;
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (bc_tool));
}
}
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