gimp/app/brightness_contrast.c

588 lines
17 KiB
C

/* 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 <stdlib.h>
#include <string.h>
#include <math.h>
#include "appenv.h"
#include "actionarea.h"
#include "brightness_contrast.h"
#include "drawable.h"
#include "general.h"
#include "gimage_mask.h"
#include "gdisplay.h"
#include "image_map.h"
#include "interface.h"
#include "gimplut.h"
#include "lut_funcs.h"
#include "libgimp/gimpintl.h"
#define TEXT_WIDTH 45
#define TEXT_HEIGHT 25
#define SLIDER_WIDTH 200
#define SLIDER_HEIGHT 35
#define BRIGHTNESS_SLIDER 0x1
#define CONTRAST_SLIDER 0x2
#define BRIGHTNESS_TEXT 0x4
#define CONTRAST_TEXT 0x8
#define ALL 0xF
/* the brightness-contrast structures */
typedef struct _BrightnessContrast BrightnessContrast;
struct _BrightnessContrast
{
int x, y; /* coords for last mouse click */
};
typedef struct _BrightnessContrastDialog BrightnessContrastDialog;
struct _BrightnessContrastDialog
{
GtkWidget *shell;
GtkWidget *gimage_name;
GtkWidget *brightness_text;
GtkWidget *contrast_text;
GtkAdjustment *brightness_data;
GtkAdjustment *contrast_data;
GimpDrawable *drawable;
ImageMap image_map;
double brightness;
double contrast;
gint preview;
GimpLut *lut;
};
/* the brightness-contrast tool options */
static ToolOptions *brightness_contrast_options = NULL;
/* the brightness-contrast dialog */
static BrightnessContrastDialog *brightness_contrast_dialog = NULL;
/* brightness contrast action functions */
static void brightness_contrast_button_press (Tool *, GdkEventButton *, gpointer);
static void brightness_contrast_button_release (Tool *, GdkEventButton *, gpointer);
static void brightness_contrast_motion (Tool *, GdkEventMotion *, gpointer);
static void brightness_contrast_cursor_update (Tool *, GdkEventMotion *, gpointer);
static void brightness_contrast_control (Tool *, int, gpointer);
static BrightnessContrastDialog * brightness_contrast_new_dialog (void);
static void brightness_contrast_update (BrightnessContrastDialog *, int);
static void brightness_contrast_preview (BrightnessContrastDialog *);
static void brightness_contrast_ok_callback (GtkWidget *, gpointer);
static void brightness_contrast_cancel_callback (GtkWidget *, gpointer);
static gint brightness_contrast_delete_callback (GtkWidget *, GdkEvent *, gpointer);
static void brightness_contrast_preview_update (GtkWidget *, gpointer);
static void brightness_contrast_brightness_scale_update (GtkAdjustment *, gpointer);
static void brightness_contrast_contrast_scale_update (GtkAdjustment *, gpointer);
static void brightness_contrast_brightness_text_update (GtkWidget *, gpointer);
static void brightness_contrast_contrast_text_update (GtkWidget *, gpointer);
/* by_color select action functions */
static void
brightness_contrast_button_press (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
gdisp = gdisp_ptr;
tool->drawable = gimage_active_drawable (gdisp->gimage);
}
static void
brightness_contrast_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
}
static void
brightness_contrast_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
}
static void
brightness_contrast_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
gdisp = (GDisplay *) gdisp_ptr;
gdisplay_install_tool_cursor (gdisp, GDK_TOP_LEFT_ARROW);
}
static void
brightness_contrast_control (Tool *tool,
int action,
gpointer gdisp_ptr)
{
switch (action)
{
case PAUSE :
break;
case RESUME :
break;
case HALT :
if (brightness_contrast_dialog)
{
active_tool->preserve = TRUE;
image_map_abort (brightness_contrast_dialog->image_map);
active_tool->preserve = TRUE;
brightness_contrast_dialog->image_map = NULL;
brightness_contrast_cancel_callback (NULL, (gpointer) brightness_contrast_dialog);
}
break;
}
}
Tool *
tools_new_brightness_contrast ()
{
Tool * tool;
BrightnessContrast * private;
/* The tool options */
if (!brightness_contrast_options)
{
brightness_contrast_options =
tool_options_new (_("Brightness-Contrast Options"));
tools_register (BRIGHTNESS_CONTRAST, brightness_contrast_options);
}
tool = (Tool *) g_malloc (sizeof (Tool));
private = (BrightnessContrast *) g_malloc (sizeof (BrightnessContrast));
tool->type = BRIGHTNESS_CONTRAST;
tool->state = INACTIVE;
tool->scroll_lock = 1; /* Disallow scrolling */
tool->auto_snap_to = TRUE;
tool->private = (void *) private;
tool->button_press_func = brightness_contrast_button_press;
tool->button_release_func = brightness_contrast_button_release;
tool->motion_func = brightness_contrast_motion;
tool->arrow_keys_func = standard_arrow_keys_func;
tool->cursor_update_func = brightness_contrast_cursor_update;
tool->control_func = brightness_contrast_control;
tool->preserve = FALSE;
tool->gdisp_ptr = NULL;
tool->drawable = NULL;
return tool;
}
void
tools_free_brightness_contrast (Tool *tool)
{
BrightnessContrast * bc;
bc = (BrightnessContrast *) tool->private;
/* Close the color select dialog */
if (brightness_contrast_dialog)
brightness_contrast_cancel_callback (NULL, (gpointer) brightness_contrast_dialog);
g_free (bc);
}
void
brightness_contrast_initialize (GDisplay *gdisp)
{
if (drawable_indexed (gimage_active_drawable (gdisp->gimage)))
{
g_message (_("Brightness-Contrast does not operate on indexed drawables."));
return;
}
/* The brightness-contrast dialog */
if (!brightness_contrast_dialog)
brightness_contrast_dialog = brightness_contrast_new_dialog ();
else
if (!GTK_WIDGET_VISIBLE (brightness_contrast_dialog->shell))
gtk_widget_show (brightness_contrast_dialog->shell);
/* Initialize dialog fields */
brightness_contrast_dialog->image_map = NULL;
brightness_contrast_dialog->brightness = 0.0;
brightness_contrast_dialog->contrast = 0.0;
brightness_contrast_dialog->drawable = gimage_active_drawable (gdisp->gimage);
brightness_contrast_dialog->image_map = image_map_create (gdisp,
brightness_contrast_dialog->drawable);
brightness_contrast_update (brightness_contrast_dialog, ALL);
}
/********************************/
/* Brightness Contrast dialog */
/********************************/
/* the action area structure */
static ActionAreaItem action_items[] =
{
{ N_("OK"), brightness_contrast_ok_callback, NULL, NULL },
{ N_("Cancel"), brightness_contrast_cancel_callback, NULL, NULL }
};
static BrightnessContrastDialog *
brightness_contrast_new_dialog ()
{
BrightnessContrastDialog *bcd;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *table;
GtkWidget *label;
GtkWidget *slider;
GtkWidget *toggle;
GtkObject *data;
bcd = g_malloc (sizeof (BrightnessContrastDialog));
bcd->preview = TRUE;
bcd->lut = gimp_lut_new();
/* The shell and main vbox */
bcd->shell = gtk_dialog_new ();
gtk_window_set_wmclass (GTK_WINDOW (bcd->shell), "brightness_contrast", "Gimp");
gtk_window_set_title (GTK_WINDOW (bcd->shell), _("Brightness-Contrast"));
/* handle wm close signal */
gtk_signal_connect (GTK_OBJECT (bcd->shell), "delete_event",
GTK_SIGNAL_FUNC (brightness_contrast_delete_callback),
bcd);
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (bcd->shell)->vbox), vbox, TRUE, TRUE, 0);
/* The table containing sliders */
table = gtk_table_new (2, 3, FALSE);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
/* Create the brightness scale widget */
label = gtk_label_new (_("Brightness"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
data = gtk_adjustment_new (0, -127, 127.0, 1.0, 1.0, 0.0);
bcd->brightness_data = GTK_ADJUSTMENT (data);
slider = gtk_hscale_new (GTK_ADJUSTMENT (data));
gtk_widget_set_usize (slider, SLIDER_WIDTH, SLIDER_HEIGHT);
gtk_scale_set_digits (GTK_SCALE (slider), 0);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
gtk_table_attach (GTK_TABLE (table), slider, 1, 2, 0, 1,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
2, 2);
gtk_signal_connect (GTK_OBJECT (data), "value_changed",
(GtkSignalFunc) brightness_contrast_brightness_scale_update,
bcd);
bcd->brightness_text = gtk_entry_new ();
gtk_widget_set_usize (bcd->brightness_text, TEXT_WIDTH, TEXT_HEIGHT);
gtk_table_attach (GTK_TABLE (table), bcd->brightness_text, 2, 3, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
gtk_signal_connect (GTK_OBJECT (bcd->brightness_text), "changed",
(GtkSignalFunc) brightness_contrast_brightness_text_update,
bcd);
gtk_widget_show (label);
gtk_widget_show (bcd->brightness_text);
gtk_widget_show (slider);
/* Create the contrast scale widget */
label = gtk_label_new (_("Contrast"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
data = gtk_adjustment_new (0, -127.0, 127.0, 1.0, 1.0, 0.0);
bcd->contrast_data = GTK_ADJUSTMENT (data);
slider = gtk_hscale_new (GTK_ADJUSTMENT (data));
gtk_widget_set_usize (slider, SLIDER_WIDTH, SLIDER_HEIGHT);
gtk_scale_set_digits (GTK_SCALE (slider), 0);
gtk_scale_set_value_pos (GTK_SCALE (slider), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (slider), GTK_UPDATE_DELAYED);
gtk_table_attach (GTK_TABLE (table), slider, 1, 2, 1, 2,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
2, 2);
gtk_signal_connect (GTK_OBJECT (data), "value_changed",
(GtkSignalFunc) brightness_contrast_contrast_scale_update,
bcd);
bcd->contrast_text = gtk_entry_new ();
gtk_widget_set_usize (bcd->contrast_text, TEXT_WIDTH, TEXT_HEIGHT);
gtk_table_attach (GTK_TABLE (table), bcd->contrast_text, 2, 3, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
gtk_signal_connect (GTK_OBJECT (bcd->contrast_text), "changed",
(GtkSignalFunc) brightness_contrast_contrast_text_update,
bcd);
gtk_widget_show (label);
gtk_widget_show (bcd->contrast_text);
gtk_widget_show (slider);
/* Horizontal box for preview and preserve luminosity toggle buttons */
hbox = gtk_hbox_new (TRUE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
/* The preview toggle */
toggle = gtk_check_button_new_with_label (_("Preview"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), bcd->preview);
gtk_box_pack_start (GTK_BOX (hbox), toggle, TRUE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) brightness_contrast_preview_update,
bcd);
gtk_widget_show (label);
gtk_widget_show (toggle);
gtk_widget_show (hbox);
/* The action area */
action_items[0].user_data = bcd;
action_items[1].user_data = bcd;
build_action_area (GTK_DIALOG (bcd->shell), action_items, 2, 0);
gtk_widget_show (table);
gtk_widget_show (vbox);
gtk_widget_show (bcd->shell);
return bcd;
}
static void
brightness_contrast_update (BrightnessContrastDialog *bcd,
int update)
{
char text[12];
if (update & BRIGHTNESS_SLIDER)
{
bcd->brightness_data->value = bcd->brightness;
gtk_signal_emit_by_name (GTK_OBJECT (bcd->brightness_data), "value_changed");
}
if (update & CONTRAST_SLIDER)
{
bcd->contrast_data->value = bcd->contrast;
gtk_signal_emit_by_name (GTK_OBJECT (bcd->contrast_data), "value_changed");
}
if (update & BRIGHTNESS_TEXT)
{
sprintf (text, "%0.0f", bcd->brightness);
gtk_entry_set_text (GTK_ENTRY (bcd->brightness_text), text);
}
if (update & CONTRAST_TEXT)
{
sprintf (text, "%0.0f", bcd->contrast);
gtk_entry_set_text (GTK_ENTRY (bcd->contrast_text), text);
}
}
static void
brightness_contrast_preview (BrightnessContrastDialog *bcd)
{
if (!bcd->image_map)
g_message (_("brightness_contrast_preview(): No image map"));
active_tool->preserve = TRUE;
brightness_contrast_lut_setup(bcd->lut, bcd->brightness / 255.0,
bcd->contrast / 127.0,
gimp_drawable_bytes(bcd->drawable));
image_map_apply (bcd->image_map, (ImageMapApplyFunc)gimp_lut_process_2,
(void *) bcd->lut);
active_tool->preserve = FALSE;
}
static void
brightness_contrast_ok_callback (GtkWidget *widget,
gpointer client_data)
{
BrightnessContrastDialog *bcd;
bcd = (BrightnessContrastDialog *) client_data;
if (GTK_WIDGET_VISIBLE (bcd->shell))
gtk_widget_hide (bcd->shell);
active_tool->preserve = TRUE;
if (!bcd->preview)
{
brightness_contrast_lut_setup(bcd->lut, bcd->brightness / 255.0,
bcd->contrast / 127.0,
gimp_drawable_bytes(bcd->drawable));
image_map_apply (bcd->image_map, (ImageMapApplyFunc)gimp_lut_process_2,
(void *) bcd->lut);
}
if (bcd->image_map)
image_map_commit (bcd->image_map);
active_tool->preserve = FALSE;
bcd->image_map = NULL;
}
static gint
brightness_contrast_delete_callback (GtkWidget *w,
GdkEvent *e,
gpointer d)
{
brightness_contrast_cancel_callback (w, d);
return TRUE;
}
static void
brightness_contrast_cancel_callback (GtkWidget *widget,
gpointer client_data)
{
BrightnessContrastDialog *bcd;
bcd = (BrightnessContrastDialog *) client_data;
if (GTK_WIDGET_VISIBLE (bcd->shell))
gtk_widget_hide (bcd->shell);
if (bcd->image_map)
{
active_tool->preserve = TRUE;
image_map_abort (bcd->image_map);
active_tool->preserve = FALSE;
gdisplays_flush ();
}
bcd->image_map = NULL;
}
static void
brightness_contrast_preview_update (GtkWidget *w,
gpointer data)
{
BrightnessContrastDialog *bcd;
bcd = (BrightnessContrastDialog *) data;
if (GTK_TOGGLE_BUTTON (w)->active)
{
bcd->preview = TRUE;
brightness_contrast_preview (bcd);
}
else
bcd->preview = FALSE;
}
static void
brightness_contrast_brightness_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
BrightnessContrastDialog *bcd;
bcd = (BrightnessContrastDialog *) data;
if (bcd->brightness != adjustment->value)
{
bcd->brightness = adjustment->value;
brightness_contrast_update (bcd, BRIGHTNESS_TEXT);
if (bcd->preview)
brightness_contrast_preview (bcd);
}
}
static void
brightness_contrast_contrast_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
BrightnessContrastDialog *bcd;
bcd = (BrightnessContrastDialog *) data;
if (bcd->contrast != adjustment->value)
{
bcd->contrast = adjustment->value;
brightness_contrast_update (bcd, CONTRAST_TEXT);
if (bcd->preview)
brightness_contrast_preview (bcd);
}
}
static void
brightness_contrast_brightness_text_update (GtkWidget *w,
gpointer data)
{
BrightnessContrastDialog *bcd;
char *str;
int value;
str = gtk_entry_get_text (GTK_ENTRY (w));
bcd = (BrightnessContrastDialog *) data;
value = BOUNDS (((int) atof (str)), -127, 127);
if ((int) bcd->brightness != value)
{
bcd->brightness = value;
brightness_contrast_update (bcd, BRIGHTNESS_SLIDER);
if (bcd->preview)
brightness_contrast_preview (bcd);
}
}
static void
brightness_contrast_contrast_text_update (GtkWidget *w,
gpointer data)
{
BrightnessContrastDialog *bcd;
char *str;
int value;
str = gtk_entry_get_text (GTK_ENTRY (w));
bcd = (BrightnessContrastDialog *) data;
value = BOUNDS (((int) atof (str)), -127, 127);
if ((int) bcd->contrast != value)
{
bcd->contrast = value;
brightness_contrast_update (bcd, CONTRAST_SLIDER);
if (bcd->preview)
brightness_contrast_preview (bcd);
}
}