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gimp/app/tools/hue_saturation.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 <stdlib.h>
#include <string.h>
#include <math.h>
#include "appenv.h"
#include "actionarea.h"
#include "colormaps.h"
#include "drawable.h"
#include "general.h"
#include "gimage_mask.h"
#include "gdisplay.h"
#include "hue_saturation.h"
#include "image_map.h"
#include "interface.h"
#include "libgimp/gimpintl.h"
#define HUE_PARTITION_MASK GDK_EXPOSURE_MASK | GDK_ENTER_NOTIFY_MASK
#define TEXT_WIDTH 45
#define TEXT_HEIGHT 25
#define SLIDER_WIDTH 200
#define SLIDER_HEIGHT 35
#define DA_WIDTH 40
#define DA_HEIGHT 20
#define HUE_PARTITION 0x0
#define HUE_SLIDER 0x1
#define LIGHTNESS_SLIDER 0x2
#define SATURATION_SLIDER 0x4
#define HUE_TEXT 0x8
#define LIGHTNESS_TEXT 0x10
#define SATURATION_TEXT 0x20
#define DRAW 0x40
#define ALL 0xFF
typedef struct _HueSaturation HueSaturation;
struct _HueSaturation
{
int x, y; /* coords for last mouse click */
};
typedef struct _HueSaturationDialog HueSaturationDialog;
struct _HueSaturationDialog
{
GtkWidget *shell;
GtkWidget *gimage_name;
GtkWidget *hue_text;
GtkWidget *lightness_text;
GtkWidget *saturation_text;
GtkWidget *hue_partition_da[6];
GtkAdjustment *hue_data;
GtkAdjustment *lightness_data;
GtkAdjustment *saturation_data;
GimpDrawable *drawable;
ImageMap image_map;
double hue[7];
double lightness[7];
double saturation[7];
int hue_partition;
gint preview;
};
/* hue saturation action functions */
static void hue_saturation_button_press (Tool *, GdkEventButton *, gpointer);
static void hue_saturation_button_release (Tool *, GdkEventButton *, gpointer);
static void hue_saturation_motion (Tool *, GdkEventMotion *, gpointer);
static void hue_saturation_cursor_update (Tool *, GdkEventMotion *, gpointer);
static void hue_saturation_control (Tool *, int, gpointer);
static HueSaturationDialog * hue_saturation_new_dialog (void);
static void hue_saturation_update (HueSaturationDialog *, int);
static void hue_saturation_preview (HueSaturationDialog *);
static void hue_saturation_ok_callback (GtkWidget *, gpointer);
static void hue_saturation_cancel_callback (GtkWidget *, gpointer);
static gint hue_saturation_delete_callback (GtkWidget *, GdkEvent *, gpointer);
static void hue_saturation_master_callback (GtkWidget *, gpointer);
static void hue_saturation_R_callback (GtkWidget *, gpointer);
static void hue_saturation_Y_callback (GtkWidget *, gpointer);
static void hue_saturation_G_callback (GtkWidget *, gpointer);
static void hue_saturation_C_callback (GtkWidget *, gpointer);
static void hue_saturation_B_callback (GtkWidget *, gpointer);
static void hue_saturation_M_callback (GtkWidget *, gpointer);
static void hue_saturation_preview_update (GtkWidget *, gpointer);
static void hue_saturation_hue_scale_update (GtkAdjustment *, gpointer);
static void hue_saturation_lightness_scale_update (GtkAdjustment *, gpointer);
static void hue_saturation_saturation_scale_update (GtkAdjustment *, gpointer);
static void hue_saturation_hue_text_update (GtkWidget *, gpointer);
static void hue_saturation_lightness_text_update (GtkWidget *, gpointer);
static void hue_saturation_saturation_text_update (GtkWidget *, gpointer);
static gint hue_saturation_hue_partition_events (GtkWidget *, GdkEvent *, HueSaturationDialog *);
static void *hue_saturation_options = NULL;
static HueSaturationDialog *hue_saturation_dialog = NULL;
static void hue_saturation (PixelRegion *, PixelRegion *, void *);
static Argument * hue_saturation_invoker (Argument *);
/* Local variables */
static int hue_transfer[6][256];
static int lightness_transfer[6][256];
static int saturation_transfer[6][256];
static int default_colors[6][3] =
{
{ 255, 0, 0 },
{ 255, 255, 0 },
{ 0, 255, 0 },
{ 0, 255, 255 },
{ 0, 0, 255 },
{ 255, 0, 255 }
};
/* hue saturation machinery */
static void
hue_saturation_calculate_transfers (HueSaturationDialog *hsd)
{
int value;
int hue;
int i;
/* Calculate transfers */
for (hue = 0; hue < 6; hue++)
for (i = 0; i < 256; i++)
{
value = (hsd->hue[0] + hsd->hue[hue + 1]) * 255.0 / 360.0;
if ((i + value) < 0)
hue_transfer[hue][i] = 255 + (i + value);
else if ((i + value) > 255)
hue_transfer[hue][i] = i + value - 255;
else
hue_transfer[hue][i] = i + value;
/* Lightness */
value = (hsd->lightness[0] + hsd->lightness[hue + 1]) * 127.0 / 100.0;
value = BOUNDS (value, -255, 255);
if (value < 0)
lightness_transfer[hue][i] = (unsigned char) ((i * (255 + value)) / 255);
else
lightness_transfer[hue][i] = (unsigned char) (i + ((255 - i) * value) / 255);
/* Saturation */
value = (hsd->saturation[0] + hsd->saturation[hue + 1]) * 255.0 / 100.0;
value = BOUNDS (value, -255, 255);
/* This change affects the way saturation is computed. With the
old code (different code for value < 0), increasing the
saturation affected muted colors very much, and bright colors
less. With the new code, it affects muted colors and bright
colors more or less evenly. For enhancing the color in photos,
the new behavior is exactly what you want. It's hard for me
to imagine a case in which the old behavior is better.
*/
saturation_transfer[hue][i] = BOUNDS((i * (255 + value)) / 255, 0, 255);
}
}
static void
hue_saturation (PixelRegion *srcPR,
PixelRegion *destPR,
void *user_data)
{
HueSaturationDialog *hsd;
unsigned char *src, *s;
unsigned char *dest, *d;
int alpha;
int w, h;
int r, g, b;
int hue;
hsd = (HueSaturationDialog *) user_data;
/* Set the transfer arrays (for speed) */
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];
rgb_to_hls (&r, &g, &b);
if (r < 43)
hue = 0;
else if (r < 85)
hue = 1;
else if (r < 128)
hue = 2;
else if (r < 171)
hue = 3;
else if (r < 213)
hue = 4;
else
hue = 5;
r = hue_transfer[hue][r];
g = lightness_transfer[hue][g];
b = saturation_transfer[hue][b];
hls_to_rgb (&r, &g, &b);
d[RED_PIX] = r;
d[GREEN_PIX] = g;
d[BLUE_PIX] = b;
if (alpha)
d[ALPHA_PIX] = s[ALPHA_PIX];
s += srcPR->bytes;
d += destPR->bytes;
}
src += srcPR->rowstride;
dest += destPR->rowstride;
}
}
/* by_color select action functions */
static void
hue_saturation_button_press (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
gdisp = gdisp_ptr;
tool->drawable = gimage_active_drawable (gdisp->gimage);
}
static void
hue_saturation_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
}
static void
hue_saturation_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
}
static void
hue_saturation_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
hue_saturation_control (Tool *tool,
int action,
gpointer gdisp_ptr)
{
HueSaturation * color_bal;
color_bal = (HueSaturation *) tool->private;
switch (action)
{
case PAUSE :
break;
case RESUME :
break;
case HALT :
if (hue_saturation_dialog)
{
active_tool->preserve = TRUE;
image_map_abort (hue_saturation_dialog->image_map);
active_tool->preserve = FALSE;
hue_saturation_dialog->image_map = NULL;
hue_saturation_cancel_callback (NULL, (gpointer) hue_saturation_dialog);
}
break;
}
}
Tool *
tools_new_hue_saturation ()
{
Tool * tool;
HueSaturation * private;
/* The tool options */
if (!hue_saturation_options)
hue_saturation_options = tools_register_no_options (HUE_SATURATION, _("Hue-Saturation Options"));
tool = (Tool *) g_malloc (sizeof (Tool));
private = (HueSaturation *) g_malloc (sizeof (HueSaturation));
tool->type = HUE_SATURATION;
tool->state = INACTIVE;
tool->scroll_lock = 1; /* Disallow scrolling */
tool->auto_snap_to = TRUE;
tool->private = (void *) private;
tool->button_press_func = hue_saturation_button_press;
tool->button_release_func = hue_saturation_button_release;
tool->motion_func = hue_saturation_motion;
tool->arrow_keys_func = standard_arrow_keys_func;
tool->cursor_update_func = hue_saturation_cursor_update;
tool->control_func = hue_saturation_control;
tool->preserve = FALSE;
tool->gdisp_ptr = NULL;
tool->drawable = NULL;
return tool;
}
void
tools_free_hue_saturation (Tool *tool)
{
HueSaturation * color_bal;
color_bal = (HueSaturation *) tool->private;
/* Close the color select dialog */
if (hue_saturation_dialog)
hue_saturation_cancel_callback (NULL, (gpointer) hue_saturation_dialog);
g_free (color_bal);
}
void
hue_saturation_initialize (GDisplay *gdisp)
{
int i;
if (! drawable_color (gimage_active_drawable (gdisp->gimage)))
{
g_message (_("Hue-Saturation operates only on RGB color drawables."));
return;
}
/* The "by color" dialog */
if (!hue_saturation_dialog)
hue_saturation_dialog = hue_saturation_new_dialog ();
else
if (!GTK_WIDGET_VISIBLE (hue_saturation_dialog->shell))
gtk_widget_show (hue_saturation_dialog->shell);
for (i = 0; i < 7; i++)
{
hue_saturation_dialog->hue[i] = 0.0;
hue_saturation_dialog->lightness[i] = 0.0;
hue_saturation_dialog->saturation[i] = 0.0;
}
hue_saturation_dialog->drawable = gimage_active_drawable (gdisp->gimage);
hue_saturation_dialog->image_map = image_map_create (gdisp, hue_saturation_dialog->drawable);
hue_saturation_update (hue_saturation_dialog, ALL);
}
void
hue_saturation_free ()
{
if (hue_saturation_dialog)
{
if (hue_saturation_dialog->image_map)
{
active_tool->preserve = TRUE;
image_map_abort (hue_saturation_dialog->image_map);
active_tool->preserve = FALSE;
hue_saturation_dialog->image_map = NULL;
}
gtk_widget_destroy (hue_saturation_dialog->shell);
}
}
/****************************/
/* Select by Color dialog */
/****************************/
/* the action area structure */
static ActionAreaItem action_items[] =
{
{ N_("OK"), hue_saturation_ok_callback, NULL, NULL },
{ N_("Cancel"), hue_saturation_cancel_callback, NULL, NULL }
};
static HueSaturationDialog *
hue_saturation_new_dialog ()
{
HueSaturationDialog *hsd;
GtkWidget *main_vbox;
GtkWidget *main_hbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *table;
GtkWidget *label;
GtkWidget *slider;
GtkWidget *toggle;
GtkWidget *radio_button;
GtkWidget *frame;
GtkObject *data;
GSList *group = NULL;
int i;
char *hue_partition_names[7] =
{
N_("Master"),
N_("R"),
N_("Y"),
N_("G"),
N_("C"),
N_("B"),
N_("M")
};
ActionCallback hue_partition_callbacks[7] =
{
hue_saturation_master_callback,
hue_saturation_R_callback,
hue_saturation_Y_callback,
hue_saturation_G_callback,
hue_saturation_C_callback,
hue_saturation_B_callback,
hue_saturation_M_callback
};
hsd = g_malloc (sizeof (HueSaturationDialog));
hsd->hue_partition = 0;
hsd->preview = TRUE;
/* The shell and main vbox */
hsd->shell = gtk_dialog_new ();
gtk_window_set_wmclass (GTK_WINDOW (hsd->shell), "hue_saturation", "Gimp");
gtk_window_set_title (GTK_WINDOW (hsd->shell), _("Hue-Saturation"));
/* handle the wm close signal */
gtk_signal_connect (GTK_OBJECT (hsd->shell), "delete_event",
GTK_SIGNAL_FUNC (hue_saturation_delete_callback),
hsd);
main_vbox = gtk_vbox_new (FALSE, 2);
gtk_container_border_width (GTK_CONTAINER (main_vbox), 2);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (hsd->shell)->vbox), main_vbox, TRUE, TRUE, 0);
/* The main hbox containing hue partitions and sliders */
main_hbox = gtk_hbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (main_vbox), main_hbox, FALSE, FALSE, 0);
/* The table containing hue partitions */
table = gtk_table_new (7, 2, FALSE);
gtk_box_pack_start (GTK_BOX (main_hbox), table, FALSE, FALSE, 0);
/* the radio buttons for hue partitions */
for (i = 0; i < 7; i++)
{
radio_button = gtk_radio_button_new_with_label (group, hue_partition_names[i]);
group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio_button));
if (!i)
{
gtk_table_attach (GTK_TABLE (table), radio_button, 0, 2, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
}
else
{
gtk_table_attach (GTK_TABLE (table), radio_button, 0, 1, i, i + 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_table_attach (GTK_TABLE (table), frame, 1, 2, i, i + 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
hsd->hue_partition_da[i - 1] = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (hsd->hue_partition_da[i - 1]), DA_WIDTH, DA_HEIGHT);
gtk_widget_set_events (hsd->hue_partition_da[i - 1], HUE_PARTITION_MASK);
gtk_signal_connect (GTK_OBJECT (hsd->hue_partition_da[i - 1]), "event",
(GtkSignalFunc) hue_saturation_hue_partition_events,
hsd);
gtk_container_add (GTK_CONTAINER (frame), hsd->hue_partition_da[i - 1]);
gtk_widget_show (hsd->hue_partition_da[i - 1]);
gtk_widget_show (frame);
}
gtk_signal_connect (GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) hue_partition_callbacks[i],
hsd);
gtk_widget_show (radio_button);
}
gtk_widget_show (table);
/* The vbox for the table and preview toggle */
vbox = gtk_vbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (main_hbox), vbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Hue / Lightness / Saturation Adjustments"));
gtk_misc_set_alignment (GTK_MISC (label), 0.5, 0.5);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* The table containing sliders */
table = gtk_table_new (3, 3, FALSE);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
/* Create the hue scale widget */
label = gtk_label_new (_("Hue"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
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, -180, 180.0, 1.0, 1.0, 0.0);
hsd->hue_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) hue_saturation_hue_scale_update,
hsd);
hsd->hue_text = gtk_entry_new ();
gtk_widget_set_usize (hsd->hue_text, TEXT_WIDTH, TEXT_HEIGHT);
gtk_table_attach (GTK_TABLE (table), hsd->hue_text, 2, 3, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
gtk_signal_connect (GTK_OBJECT (hsd->hue_text), "changed",
(GtkSignalFunc) hue_saturation_hue_text_update,
hsd);
gtk_widget_show (label);
gtk_widget_show (hsd->hue_text);
gtk_widget_show (slider);
/* Create the lightness scale widget */
label = gtk_label_new (_("Lightness"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
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, -100.0, 100.0, 1.0, 1.0, 0.0);
hsd->lightness_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) hue_saturation_lightness_scale_update,
hsd);
hsd->lightness_text = gtk_entry_new ();
gtk_widget_set_usize (hsd->lightness_text, TEXT_WIDTH, TEXT_HEIGHT);
gtk_table_attach (GTK_TABLE (table), hsd->lightness_text, 2, 3, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
gtk_signal_connect (GTK_OBJECT (hsd->lightness_text), "changed",
(GtkSignalFunc) hue_saturation_lightness_text_update,
hsd);
gtk_widget_show (label);
gtk_widget_show (hsd->lightness_text);
gtk_widget_show (slider);
/* Create the saturation scale widget */
label = gtk_label_new (_("Saturation"));
gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 2, 2);
data = gtk_adjustment_new (0, -100.0, 100.0, 1.0, 1.0, 0.0);
hsd->saturation_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, 2, 3,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
2, 2);
gtk_signal_connect (GTK_OBJECT (data), "value_changed",
(GtkSignalFunc) hue_saturation_saturation_scale_update,
hsd);
hsd->saturation_text = gtk_entry_new ();
gtk_widget_set_usize (hsd->saturation_text, TEXT_WIDTH, TEXT_HEIGHT);
gtk_table_attach (GTK_TABLE (table), hsd->saturation_text, 2, 3, 2, 3,
GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 3, 2);
gtk_signal_connect (GTK_OBJECT (hsd->saturation_text), "changed",
(GtkSignalFunc) hue_saturation_saturation_text_update,
hsd);
gtk_widget_show (label);
gtk_widget_show (hsd->saturation_text);
gtk_widget_show (slider);
/* Horizontal box for preview and colorize 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), hsd->preview);
gtk_box_pack_start (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) hue_saturation_preview_update,
hsd);
gtk_widget_show (toggle);
gtk_widget_show (hbox);
/* The action area */
action_items[0].user_data = hsd;
action_items[1].user_data = hsd;
build_action_area (GTK_DIALOG (hsd->shell), action_items, 2, 0);
gtk_widget_show (table);
gtk_widget_show (vbox);
gtk_widget_show (main_hbox);
gtk_widget_show (main_vbox);
gtk_widget_show (hsd->shell);
return hsd;
}
static void
hue_saturation_update (HueSaturationDialog *hsd,
int update)
{
int i, j, b;
int rgb[3];
unsigned char buf[DA_WIDTH * 3];
char text[12];
if (update & HUE_SLIDER)
{
hsd->hue_data->value = hsd->hue[hsd->hue_partition];
gtk_signal_emit_by_name (GTK_OBJECT (hsd->hue_data), "value_changed");
}
if (update & LIGHTNESS_SLIDER)
{
hsd->lightness_data->value = hsd->lightness[hsd->hue_partition];
gtk_signal_emit_by_name (GTK_OBJECT (hsd->lightness_data), "value_changed");
}
if (update & SATURATION_SLIDER)
{
hsd->saturation_data->value = hsd->saturation[hsd->hue_partition];
gtk_signal_emit_by_name (GTK_OBJECT (hsd->saturation_data), "value_changed");
}
if (update & HUE_TEXT)
{
sprintf (text, "%0.0f", hsd->hue[hsd->hue_partition]);
gtk_entry_set_text (GTK_ENTRY (hsd->hue_text), text);
}
if (update & LIGHTNESS_TEXT)
{
sprintf (text, "%0.0f", hsd->lightness[hsd->hue_partition]);
gtk_entry_set_text (GTK_ENTRY (hsd->lightness_text), text);
}
if (update & SATURATION_TEXT)
{
sprintf (text, "%0.0f", hsd->saturation[hsd->hue_partition]);
gtk_entry_set_text (GTK_ENTRY (hsd->saturation_text), text);
}
hue_saturation_calculate_transfers (hsd);
for (i = 0; i < 6; i++)
{
rgb[RED_PIX] = default_colors[i][RED_PIX];
rgb[GREEN_PIX] = default_colors[i][GREEN_PIX];
rgb[BLUE_PIX] = default_colors[i][BLUE_PIX];
rgb_to_hls (rgb, rgb + 1, rgb + 2);
rgb[RED_PIX] = hue_transfer[i][rgb[RED_PIX]];
rgb[GREEN_PIX] = lightness_transfer[i][rgb[GREEN_PIX]];
rgb[BLUE_PIX] = saturation_transfer[i][rgb[BLUE_PIX]];
hls_to_rgb (rgb, rgb + 1, rgb + 2);
for (j = 0; j < DA_WIDTH; j++)
for (b = 0; b < 3; b++)
buf[j * 3 + b] = (unsigned char) rgb[b];
for (j = 0; j < DA_HEIGHT; j++)
gtk_preview_draw_row (GTK_PREVIEW (hsd->hue_partition_da[i]), buf, 0, j, DA_WIDTH);
if (update & DRAW)
gtk_widget_draw (hsd->hue_partition_da[i], NULL);
}
}
static void
hue_saturation_preview (HueSaturationDialog *hsd)
{
if (!hsd->image_map)
g_message (_("hue_saturation_preview(): No image map"));
active_tool->preserve = TRUE;
image_map_apply (hsd->image_map, hue_saturation, (void *) hsd);
active_tool->preserve = FALSE;
}
static void
hue_saturation_ok_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
if (GTK_WIDGET_VISIBLE (hsd->shell))
gtk_widget_hide (hsd->shell);
active_tool->preserve = TRUE;
if (!hsd->preview)
image_map_apply (hsd->image_map, hue_saturation, (void *) hsd);
if (hsd->image_map)
image_map_commit (hsd->image_map);
active_tool->preserve = FALSE;
hsd->image_map = NULL;
}
static gint
hue_saturation_delete_callback (GtkWidget *w,
GdkEvent *e,
gpointer client_data)
{
hue_saturation_cancel_callback (w, client_data);
return TRUE;
}
static void
hue_saturation_cancel_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
if (GTK_WIDGET_VISIBLE (hsd->shell))
gtk_widget_hide (hsd->shell);
if (hsd->image_map)
{
active_tool->preserve = TRUE;
image_map_abort (hsd->image_map);
active_tool->preserve = FALSE;
gdisplays_flush ();
}
hsd->image_map = NULL;
}
static void
hue_saturation_master_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
hsd->hue_partition = 0;
hue_saturation_update (hsd, ALL);
}
static void
hue_saturation_R_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
hsd->hue_partition = 1;
hue_saturation_update (hsd, ALL);
}
static void
hue_saturation_Y_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
hsd->hue_partition = 2;
hue_saturation_update (hsd, ALL);
}
static void
hue_saturation_G_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
hsd->hue_partition = 3;
hue_saturation_update (hsd, ALL);
}
static void
hue_saturation_C_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
hsd->hue_partition = 4;
hue_saturation_update (hsd, ALL);
}
static void
hue_saturation_B_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
hsd->hue_partition = 5;
hue_saturation_update (hsd, ALL);
}
static void
hue_saturation_M_callback (GtkWidget *widget,
gpointer client_data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) client_data;
hsd->hue_partition = 6;
hue_saturation_update (hsd, ALL);
}
static void
hue_saturation_preview_update (GtkWidget *w,
gpointer data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) data;
if (GTK_TOGGLE_BUTTON (w)->active)
{
hsd->preview = TRUE;
hue_saturation_preview (hsd);
}
else
hsd->preview = FALSE;
}
static void
hue_saturation_hue_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) data;
if (hsd->hue[hsd->hue_partition] != adjustment->value)
{
hsd->hue[hsd->hue_partition] = adjustment->value;
hue_saturation_update (hsd, HUE_TEXT | DRAW);
if (hsd->preview)
hue_saturation_preview (hsd);
}
}
static void
hue_saturation_lightness_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) data;
if (hsd->lightness[hsd->hue_partition] != adjustment->value)
{
hsd->lightness[hsd->hue_partition] = adjustment->value;
hue_saturation_update (hsd, LIGHTNESS_TEXT | DRAW);
if (hsd->preview)
hue_saturation_preview (hsd);
}
}
static void
hue_saturation_saturation_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
HueSaturationDialog *hsd;
hsd = (HueSaturationDialog *) data;
if (hsd->saturation[hsd->hue_partition] != adjustment->value)
{
hsd->saturation[hsd->hue_partition] = adjustment->value;
hue_saturation_update (hsd, SATURATION_TEXT | DRAW);
if (hsd->preview)
hue_saturation_preview (hsd);
}
}
static void
hue_saturation_hue_text_update (GtkWidget *w,
gpointer data)
{
HueSaturationDialog *hsd;
char *str;
int value;
str = gtk_entry_get_text (GTK_ENTRY (w));
hsd = (HueSaturationDialog *) data;
value = BOUNDS (((int) atof (str)), -180, 180);
if ((int) hsd->hue[hsd->hue_partition] != value)
{
hsd->hue[hsd->hue_partition] = value;
hue_saturation_update (hsd, HUE_SLIDER | DRAW);
if (hsd->preview)
hue_saturation_preview (hsd);
}
}
static void
hue_saturation_lightness_text_update (GtkWidget *w,
gpointer data)
{
HueSaturationDialog *hsd;
char *str;
int value;
str = gtk_entry_get_text (GTK_ENTRY (w));
hsd = (HueSaturationDialog *) data;
value = BOUNDS (((int) atof (str)), -100, 100);
if ((int) hsd->lightness[hsd->hue_partition] != value)
{
hsd->lightness[hsd->hue_partition] = value;
hue_saturation_update (hsd, LIGHTNESS_SLIDER | DRAW);
if (hsd->preview)
hue_saturation_preview (hsd);
}
}
static void
hue_saturation_saturation_text_update (GtkWidget *w,
gpointer data)
{
HueSaturationDialog *hsd;
char *str;
int value;
str = gtk_entry_get_text (GTK_ENTRY (w));
hsd = (HueSaturationDialog *) data;
value = BOUNDS (((int) atof (str)), -100, 100);
if ((int) hsd->saturation[hsd->hue_partition] != value)
{
hsd->saturation[hsd->hue_partition] = value;
hue_saturation_update (hsd, SATURATION_SLIDER | DRAW);
if (hsd->preview)
hue_saturation_preview (hsd);
}
}
static gint
hue_saturation_hue_partition_events (GtkWidget *widget,
GdkEvent *event,
HueSaturationDialog *hsd)
{
switch (event->type)
{
case GDK_EXPOSE:
hue_saturation_update (hsd, HUE_PARTITION);
break;
default:
break;
}
return FALSE;
}
/* The hue_saturation procedure definition */
ProcArg hue_saturation_args[] =
{
{ PDB_DRAWABLE,
"drawable",
"the drawable"
},
{ PDB_INT32,
"hue_range",
"range of affected hues: { ALL_HUES (0), RED_HUES (1), YELLOW_HUES (2), GREEN_HUES (3), CYAN_HUES (4), BLUE_HUES (5), MAGENTA_HUES (6)"
},
{ PDB_FLOAT,
"hue_offset",
"hue offset in degrees: (-180 <= hue_offset <= 180)"
},
{ PDB_FLOAT,
"lightness",
"lightness modification: (-100 <= lightness <= 100)"
},
{ PDB_FLOAT,
"saturation",
"saturation modification: (-100 <= saturation <= 100)"
}
};
ProcRecord hue_saturation_proc =
{
"gimp_hue_saturation",
"Modify hue, lightness, and saturation in the specified drawable",
"This procedures allows the hue, lightness, and saturation in the specified drawable to be modified. The 'hue_range' parameter provides the capability to limit range of affected hues.",
"Spencer Kimball & Peter Mattis",
"Spencer Kimball & Peter Mattis",
"1997",
PDB_INTERNAL,
/* Input arguments */
5,
hue_saturation_args,
/* Output arguments */
0,
NULL,
/* Exec method */
{ { hue_saturation_invoker } },
};
static Argument *
hue_saturation_invoker (Argument *args)
{
PixelRegion srcPR, destPR;
int success = TRUE;
HueSaturationDialog hsd;
GImage *gimage;
GimpDrawable *drawable;
int hue_range;
double hue_offset;
double lightness;
double saturation;
int int_value;
double fp_value;
int x1, y1, x2, y2;
int i;
void *pr;
drawable = NULL;
hue_range = 0;
hue_offset = 0.0;
lightness = 0.0;
saturation = 0.0;
/* the drawable */
if (success)
{
int_value = args[0].value.pdb_int;
drawable = drawable_get_ID (int_value);
if (drawable == NULL)
success = FALSE;
else
gimage = drawable_gimage (drawable);
}
/* make sure the drawable is not indexed color */
if (success)
success = ! drawable_indexed (drawable);
/* hue_range */
if (success)
{
int_value = args[1].value.pdb_int;
if (int_value < 0 || int_value > 6)
success = FALSE;
else
hue_range = int_value;
}
/* hue_offset */
if (success)
{
fp_value = args[2].value.pdb_float;
if (fp_value < -180 || fp_value > 180)
success = FALSE;
else
hue_offset = fp_value;
}
/* lightness */
if (success)
{
fp_value = args[3].value.pdb_float;
if (fp_value < -100 || fp_value > 100)
success = FALSE;
else
lightness = fp_value;
}
/* saturation */
if (success)
{
fp_value = args[4].value.pdb_float;
if (fp_value < -100 || fp_value > 100)
success = FALSE;
else
saturation = fp_value;
}
/* arrange to modify the levels */
if (success)
{
for (i = 0; i < 7; i++)
{
hsd.hue[i] = 0.0;
hsd.lightness[i] = 0.0;
hsd.saturation[i] = 0.0;
}
hsd.hue[hue_range] = hue_offset;
hsd.lightness[hue_range] = lightness;
hsd.saturation[hue_range] = saturation;
/* calculate the transfer arrays */
hue_saturation_calculate_transfers (&hsd);
/* The application should occur only within selection bounds */
drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
pixel_region_init (&srcPR, drawable_data (drawable), x1, y1, (x2 - x1), (y2 - y1), FALSE);
pixel_region_init (&destPR, drawable_shadow (drawable), x1, y1, (x2 - x1), (y2 - y1), TRUE);
for (pr = pixel_regions_register (2, &srcPR, &destPR); pr != NULL; pr = pixel_regions_process (pr))
hue_saturation (&srcPR, &destPR, (void *) &hsd);
drawable_merge_shadow (drawable, TRUE);
drawable_update (drawable, x1, y1, (x2 - x1), (y2 - y1));
}
return procedural_db_return_args (&hue_saturation_proc, success);
}
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