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gimp/app/color_balance.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 "appenv.h"
#include "color_balance.h"
#include "color_transfer.h"
#include "drawable.h"
#include "gdisplay.h"
#include "gimpui.h"
#include "image_map.h"
#include "config.h"
#include "libgimp/gimpintl.h"
#include "libgimp/gimpmath.h"
#include "libgimp/gimpcolorspace.h"
#define CYAN_RED 0x1
#define MAGENTA_GREEN 0x2
#define YELLOW_BLUE 0x4
#define ALL (CYAN_RED | MAGENTA_GREEN | YELLOW_BLUE)
/* the color balance structures */
typedef struct _ColorBalance ColorBalance;
struct _ColorBalance
{
gint x, y; /* coords for last mouse click */
};
/* the color balance tool options */
static ToolOptions *color_balance_options = NULL;
/* the color balance dialog */
static ColorBalanceDialog *color_balance_dialog = NULL;
/* color balance action functions */
static void color_balance_control (Tool *, ToolAction, gpointer);
static ColorBalanceDialog * color_balance_dialog_new (void);
static void color_balance_update (ColorBalanceDialog *, int);
static void color_balance_preview (ColorBalanceDialog *);
static void color_balance_reset_callback (GtkWidget *, gpointer);
static void color_balance_ok_callback (GtkWidget *, gpointer);
static void color_balance_cancel_callback (GtkWidget *, gpointer);
static void color_balance_range_callback (GtkWidget *, gpointer);
static void color_balance_preserve_update (GtkWidget *, gpointer);
static void color_balance_preview_update (GtkWidget *, gpointer);
static void color_balance_cr_adjustment_update (GtkAdjustment *, gpointer);
static void color_balance_mg_adjustment_update (GtkAdjustment *, gpointer);
static void color_balance_yb_adjustment_update (GtkAdjustment *, gpointer);
/* color balance machinery */
void
color_balance (PixelRegion *srcPR,
PixelRegion *destPR,
void *data)
{
ColorBalanceDialog *cbd;
guchar *src, *s;
guchar *dest, *d;
gint alpha;
gint r, g, b;
gint r_n, g_n, b_n;
gint w, h;
cbd = (ColorBalanceDialog *) data;
h = srcPR->h;
src = srcPR->data;
dest = destPR->data;
alpha = (srcPR->bytes == 4) ? TRUE : FALSE;
while (h--)
{
w = srcPR->w;
s = src;
d = dest;
while (w--)
{
r = s[RED_PIX];
g = s[GREEN_PIX];
b = s[BLUE_PIX];
r_n = cbd->r_lookup[r];
g_n = cbd->g_lookup[g];
b_n = cbd->b_lookup[b];
if (cbd->preserve_luminosity)
{
gimp_rgb_to_hls (&r_n, &g_n, &b_n);
g_n = gimp_rgb_to_l (r, g, b);
gimp_hls_to_rgb (&r_n, &g_n, &b_n);
}
d[RED_PIX] = r_n;
d[GREEN_PIX] = g_n;
d[BLUE_PIX] = b_n;
if (alpha)
d[ALPHA_PIX] = s[ALPHA_PIX];
s += srcPR->bytes;
d += destPR->bytes;
}
src += srcPR->rowstride;
dest += destPR->rowstride;
}
}
/* color balance action functions */
static void
color_balance_control (Tool *tool,
ToolAction action,
gpointer gdisp_ptr)
{
ColorBalance * color_bal;
color_bal = (ColorBalance *) tool->private;
switch (action)
{
case PAUSE:
break;
case RESUME:
break;
case HALT:
if (color_balance_dialog)
color_balance_cancel_callback (NULL, (gpointer) color_balance_dialog);
break;
default:
break;
}
}
Tool *
tools_new_color_balance (void)
{
Tool * tool;
ColorBalance * private;
/* The tool options */
if (!color_balance_options)
{
color_balance_options = tool_options_new (_("Color Balance"));
tools_register (COLOR_BALANCE, color_balance_options);
}
tool = tools_new_tool (COLOR_BALANCE);
private = g_new0 (ColorBalance, 1);
tool->scroll_lock = TRUE; /* Disallow scrolling */
tool->preserve = FALSE; /* Don't preserve on drawable change */
tool->private = (void *) private;
tool->control_func = color_balance_control;
return tool;
}
void
tools_free_color_balance (Tool *tool)
{
ColorBalance * color_bal;
color_bal = (ColorBalance *) tool->private;
/* Close the color select dialog */
if (color_balance_dialog)
color_balance_cancel_callback (NULL, (gpointer) color_balance_dialog);
g_free (color_bal);
}
void
color_balance_initialize (GDisplay *gdisp)
{
gint i;
if (! drawable_color (gimage_active_drawable (gdisp->gimage)))
{
g_message (_("Color balance operates only on RGB color drawables."));
return;
}
/* The color balance dialog */
if (!color_balance_dialog)
color_balance_dialog = color_balance_dialog_new ();
else
if (!GTK_WIDGET_VISIBLE (color_balance_dialog->shell))
gtk_widget_show (color_balance_dialog->shell);
for (i = 0; i < 3; i++)
{
color_balance_dialog->cyan_red[i] = 0.0;
color_balance_dialog->magenta_green[i] = 0.0;
color_balance_dialog->yellow_blue[i] = 0.0;
}
color_balance_dialog->drawable = gimage_active_drawable (gdisp->gimage);
color_balance_dialog->image_map =
image_map_create (gdisp, color_balance_dialog->drawable);
color_balance_update (color_balance_dialog, ALL);
}
/**************************/
/* Color Balance dialog */
/**************************/
static ColorBalanceDialog *
color_balance_dialog_new (void)
{
ColorBalanceDialog *cbd;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *table;
GtkWidget *start_label;
GtkWidget *end_label;
GtkWidget *label;
GtkWidget *spinbutton;
GtkWidget *slider;
GtkWidget *toggle;
GtkWidget *radio_button;
GtkObject *data;
GSList *group = NULL;
gint i;
gchar *appl_mode_names[] =
{
N_("Shadows"),
N_("Midtones"),
N_("Highlights")
};
cbd = g_new (ColorBalanceDialog, 1);
cbd->preserve_luminosity = TRUE;
cbd->preview = TRUE;
cbd->application_mode = SHADOWS;
/* The shell and main vbox */
cbd->shell = gimp_dialog_new (_("Color Balance"), "color_balance",
tools_help_func, NULL,
GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
_("OK"), color_balance_ok_callback,
cbd, NULL, NULL, TRUE, FALSE,
_("Reset"), color_balance_reset_callback,
cbd, NULL, NULL, TRUE, FALSE,
_("Cancel"), color_balance_cancel_callback,
cbd, NULL, NULL, FALSE, TRUE,
NULL);
vbox = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (cbd->shell)->vbox), vbox);
/* Horizontal box for application mode */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Color Levels:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* cyan-red spinbutton */
data = gtk_adjustment_new (0, -100.0, 100.0, 1.0, 10.0, 0.0);
cbd->cyan_red_data = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (cbd->cyan_red_data, 1.0, 0);
gtk_widget_set_usize (spinbutton, 75, -1);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
/* magenta-green spinbutton */
data = gtk_adjustment_new (0, -100.0, 100.0, 1.0, 10.0, 0.0);
cbd->magenta_green_data = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (cbd->magenta_green_data, 1.0, 0);
gtk_widget_set_usize (spinbutton, 75, -1);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
/* yellow-blue spinbutton */
data = gtk_adjustment_new (0, -100.0, 100.0, 1.0, 10.0, 0.0);
cbd->yellow_blue_data = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (cbd->yellow_blue_data, 1.0, 0);
gtk_widget_set_usize (spinbutton, 75, -1);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
gtk_widget_show (hbox);
/* The table containing sliders */
table = gtk_table_new (3, 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 (vbox), table, FALSE, FALSE, 0);
/* Create the cyan-red scale widget */
start_label = gtk_label_new (_("Cyan"));
gtk_misc_set_alignment (GTK_MISC (start_label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), start_label, 0, 1, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
slider = gtk_hscale_new (cbd->cyan_red_data);
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_defaults (GTK_TABLE (table), slider, 1, 2, 0, 1);
gtk_signal_connect (GTK_OBJECT (cbd->cyan_red_data), "value_changed",
GTK_SIGNAL_FUNC (color_balance_cr_adjustment_update),
cbd);
end_label = gtk_label_new (_("Red"));
gtk_misc_set_alignment (GTK_MISC (end_label), 0.0, 1.0);
gtk_table_attach (GTK_TABLE (table), end_label, 2, 3, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (start_label);
gtk_widget_show (end_label);
gtk_widget_show (slider);
/* Create the magenta-green scale widget */
start_label = gtk_label_new (_("Magenta"));
gtk_misc_set_alignment (GTK_MISC (start_label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), start_label, 0, 1, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
slider = gtk_hscale_new (cbd->magenta_green_data);
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_defaults (GTK_TABLE (table), slider, 1, 2, 1, 2);
gtk_signal_connect (GTK_OBJECT (cbd->magenta_green_data), "value_changed",
GTK_SIGNAL_FUNC (color_balance_mg_adjustment_update),
cbd);
end_label = gtk_label_new (_("Green"));
gtk_misc_set_alignment (GTK_MISC (end_label), 0.0, 1.0);
gtk_table_attach (GTK_TABLE (table), end_label, 2, 3, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (start_label);
gtk_widget_show (end_label);
gtk_widget_show (slider);
/* Create the yellow-blue scale widget */
start_label = gtk_label_new (_("Yellow"));
gtk_misc_set_alignment (GTK_MISC (start_label), 1.0, 1.0);
gtk_table_attach (GTK_TABLE (table), start_label, 0, 1, 2, 3,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
slider = gtk_hscale_new (cbd->yellow_blue_data);
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_defaults (GTK_TABLE (table), slider, 1, 2, 2, 3);
gtk_signal_connect (GTK_OBJECT (cbd->yellow_blue_data), "value_changed",
GTK_SIGNAL_FUNC (color_balance_yb_adjustment_update),
cbd);
end_label = gtk_label_new (_("Blue"));
gtk_misc_set_alignment (GTK_MISC (end_label), 0.0, 1.0);
gtk_table_attach (GTK_TABLE (table), end_label, 2, 3, 2, 3,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
gtk_widget_show (start_label);
gtk_widget_show (end_label);
gtk_widget_show (slider);
gtk_widget_show (table);
/* Horizontal box for application mode */
hbox = gtk_hbox_new (TRUE, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
/* the radio buttons for application mode */
for (i = 0; i < 3; i++)
{
radio_button =
gtk_radio_button_new_with_label (group, gettext (appl_mode_names[i]));
group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio_button));
gtk_box_pack_start (GTK_BOX (hbox), radio_button, TRUE, FALSE, 0);
gtk_object_set_user_data (GTK_OBJECT (radio_button), (gpointer) i);
gtk_signal_connect (GTK_OBJECT (radio_button), "toggled",
GTK_SIGNAL_FUNC (color_balance_range_callback),
cbd);
gtk_widget_show (radio_button);
}
gtk_widget_show (hbox);
/* Horizontal box for preview and preserve luminosity toggle buttons */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
/* The preserve luminosity toggle */
toggle = gtk_check_button_new_with_label (_("Preserve Luminosity"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
cbd->preserve_luminosity);
gtk_box_pack_start (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
GTK_SIGNAL_FUNC (color_balance_preserve_update),
cbd);
gtk_widget_show (toggle);
/* The preview toggle */
toggle = gtk_check_button_new_with_label (_("Preview"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cbd->preview);
gtk_box_pack_end (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
GTK_SIGNAL_FUNC (color_balance_preview_update),
cbd);
gtk_widget_show (toggle);
gtk_widget_show (hbox);
gtk_widget_show (vbox);
gtk_widget_show (cbd->shell);
return cbd;
}
static void
color_balance_update (ColorBalanceDialog *cbd,
gint update)
{
if (update & CYAN_RED)
{
gtk_adjustment_set_value (cbd->cyan_red_data,
cbd->cyan_red[cbd->application_mode]);
}
if (update & MAGENTA_GREEN)
{
gtk_adjustment_set_value (cbd->magenta_green_data,
cbd->magenta_green[cbd->application_mode]);
}
if (update & YELLOW_BLUE)
{
gtk_adjustment_set_value (cbd->yellow_blue_data,
cbd->yellow_blue[cbd->application_mode]);
}
}
void
color_balance_create_lookup_tables (ColorBalanceDialog *cbd)
{
gdouble *cyan_red_transfer[3];
gdouble *magenta_green_transfer[3];
gdouble *yellow_blue_transfer[3];
gint i;
gint32 r_n, g_n, b_n;
/* Set the transfer arrays (for speed) */
cyan_red_transfer[SHADOWS] = (cbd->cyan_red[SHADOWS] > 0) ? shadows_add : shadows_sub;
cyan_red_transfer[MIDTONES] = (cbd->cyan_red[MIDTONES] > 0) ? midtones_add : midtones_sub;
cyan_red_transfer[HIGHLIGHTS] = (cbd->cyan_red[HIGHLIGHTS] > 0) ? highlights_add : highlights_sub;
magenta_green_transfer[SHADOWS] = (cbd->magenta_green[SHADOWS] > 0) ? shadows_add : shadows_sub;
magenta_green_transfer[MIDTONES] = (cbd->magenta_green[MIDTONES] > 0) ? midtones_add : midtones_sub;
magenta_green_transfer[HIGHLIGHTS] = (cbd->magenta_green[HIGHLIGHTS] > 0) ? highlights_add : highlights_sub;
yellow_blue_transfer[SHADOWS] = (cbd->yellow_blue[SHADOWS] > 0) ? shadows_add : shadows_sub;
yellow_blue_transfer[MIDTONES] = (cbd->yellow_blue[MIDTONES] > 0) ? midtones_add : midtones_sub;
yellow_blue_transfer[HIGHLIGHTS] = (cbd->yellow_blue[HIGHLIGHTS] > 0) ? highlights_add : highlights_sub;
for (i = 0; i < 256; i++)
{
r_n = i;
g_n = i;
b_n = i;
r_n += cbd->cyan_red[SHADOWS] * cyan_red_transfer[SHADOWS][r_n];
r_n = CLAMP0255 (r_n);
r_n += cbd->cyan_red[MIDTONES] * cyan_red_transfer[MIDTONES][r_n];
r_n = CLAMP0255 (r_n);
r_n += cbd->cyan_red[HIGHLIGHTS] * cyan_red_transfer[HIGHLIGHTS][r_n];
r_n = CLAMP0255 (r_n);
g_n += cbd->magenta_green[SHADOWS] * magenta_green_transfer[SHADOWS][g_n];
g_n = CLAMP0255 (g_n);
g_n += cbd->magenta_green[MIDTONES] * magenta_green_transfer[MIDTONES][g_n];
g_n = CLAMP0255 (g_n);
g_n += cbd->magenta_green[HIGHLIGHTS] * magenta_green_transfer[HIGHLIGHTS][g_n];
g_n = CLAMP0255 (g_n);
b_n += cbd->yellow_blue[SHADOWS] * yellow_blue_transfer[SHADOWS][b_n];
b_n = CLAMP0255 (b_n);
b_n += cbd->yellow_blue[MIDTONES] * yellow_blue_transfer[MIDTONES][b_n];
b_n = CLAMP0255 (b_n);
b_n += cbd->yellow_blue[HIGHLIGHTS] * yellow_blue_transfer[HIGHLIGHTS][b_n];
b_n = CLAMP0255 (b_n);
cbd->r_lookup[i] = r_n;
cbd->g_lookup[i] = g_n;
cbd->b_lookup[i] = b_n;
}
}
static void
color_balance_preview (ColorBalanceDialog *cbd)
{
if (!cbd->image_map)
{
g_message ("color_balance_preview(): No image map");
return;
}
active_tool->preserve = TRUE;
color_balance_create_lookup_tables (cbd);
image_map_apply (cbd->image_map, color_balance, (void *) cbd);
active_tool->preserve = FALSE;
}
static void
color_balance_reset_callback (GtkWidget *widget,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
cbd->cyan_red[cbd->application_mode] = 0.0;
cbd->magenta_green[cbd->application_mode] = 0.0;
cbd->yellow_blue[cbd->application_mode] = 0.0;
color_balance_update (cbd, ALL);
if (cbd->preview)
color_balance_preview (cbd);
}
static void
color_balance_ok_callback (GtkWidget *widget,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
gimp_dialog_hide (cbd->shell);
active_tool->preserve = TRUE;
if (!cbd->preview)
image_map_apply (cbd->image_map, color_balance, (void *) cbd);
if (cbd->image_map)
image_map_commit (cbd->image_map);
active_tool->preserve = FALSE;
cbd->image_map = NULL;
active_tool->gdisp_ptr = NULL;
active_tool->drawable = NULL;
}
static void
color_balance_cancel_callback (GtkWidget *widget,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
gimp_dialog_hide (cbd->shell);
if (cbd->image_map)
{
active_tool->preserve = TRUE;
image_map_abort (cbd->image_map);
active_tool->preserve = FALSE;
gdisplays_flush ();
cbd->image_map = NULL;
}
active_tool->gdisp_ptr = NULL;
active_tool->drawable = NULL;
}
static void
color_balance_range_callback (GtkWidget *widget,
gpointer data)
{
ColorBalanceDialog *cbd;
TransferMode range;
cbd = (ColorBalanceDialog *) data;
range = (TransferMode) gtk_object_get_user_data (GTK_OBJECT (widget));
cbd->application_mode = range;
color_balance_update (cbd, ALL);
}
static void
color_balance_preserve_update (GtkWidget *widget,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
cbd->preserve_luminosity = TRUE;
else
cbd->preserve_luminosity = FALSE;
if (cbd->preview)
color_balance_preview (cbd);
}
static void
color_balance_preview_update (GtkWidget *widget,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
{
cbd->preview = TRUE;
color_balance_preview (cbd);
}
else
{
cbd->preview = FALSE;
if (cbd->image_map)
{
active_tool->preserve = TRUE;
image_map_clear (cbd->image_map);
active_tool->preserve = FALSE;
gdisplays_flush ();
}
}
}
static void
color_balance_cr_adjustment_update (GtkAdjustment *adjustment,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
if (cbd->cyan_red[cbd->application_mode] != adjustment->value)
{
cbd->cyan_red[cbd->application_mode] = adjustment->value;
if (cbd->preview)
color_balance_preview (cbd);
}
}
static void
color_balance_mg_adjustment_update (GtkAdjustment *adjustment,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
if (cbd->magenta_green[cbd->application_mode] != adjustment->value)
{
cbd->magenta_green[cbd->application_mode] = adjustment->value;
if (cbd->preview)
color_balance_preview (cbd);
}
}
static void
color_balance_yb_adjustment_update (GtkAdjustment *adjustment,
gpointer data)
{
ColorBalanceDialog *cbd;
cbd = (ColorBalanceDialog *) data;
if (cbd->yellow_blue[cbd->application_mode] != adjustment->value)
{
cbd->yellow_blue[cbd->application_mode] = adjustment->value;
if (cbd->preview)
color_balance_preview (cbd);
}
}
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