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gimp/app/base/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"
#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);
#if 0
saturation_transfer[hue][i] = (unsigned char) (BOUNDS ((i * (255 + value)) / 255, 0, 255));
#else
if (value < 0)
saturation_transfer[hue][i] = (unsigned char) ((i * (255 + value)) / 255);
else
saturation_transfer[hue][i] = (unsigned char) (i + ((255 - i) * value) / 255);
#endif
}
}
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 (void *gdisp_ptr)
{
GDisplay *gdisp;
int i;
gdisp = (GDisplay *) gdisp_ptr;
if (! drawable_color (gimage_active_drawable (gdisp->gimage)))
{
message_box ("Hue-Saturation operates only on RGB color drawables.", NULL, NULL);
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_ptr, 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[] =
{
{ "OK", hue_saturation_ok_callback, NULL, NULL },
{ "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] =
{
"Master",
"R",
"Y",
"G",
"C",
"B",
"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, 2, 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_state (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_warning ("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_IMAGE,
"image",
"the image"
},
{ 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 */
6,
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 gimage */
if (success)
{
int_value = args[0].value.pdb_int;
if (! (gimage = gimage_get_ID (int_value)))
success = FALSE;
}
/* the drawable */
if (success)
{
int_value = args[1].value.pdb_int;
drawable = drawable_get_ID (int_value);
if (drawable == NULL || gimage != drawable_gimage (drawable))
success = FALSE;
}
/* make sure the drawable is not indexed color */
if (success)
success = ! drawable_indexed (drawable);
/* hue_range */
if (success)
{
int_value = args[2].value.pdb_int;
if (int_value < 0 || int_value > 6)
success = FALSE;
else
hue_range = int_value;
}
/* hue_offset */
if (success)
{
fp_value = args[3].value.pdb_float;
if (fp_value < -180 || fp_value > 180)
success = FALSE;
else
hue_offset = fp_value;
}
/* lightness */
if (success)
{
fp_value = args[4].value.pdb_float;
if (fp_value < -100 || fp_value > 100)
success = FALSE;
else
lightness = fp_value;
}
/* saturation */
if (success)
{
fp_value = args[5].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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