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gimp/app/tools/gimplevelstool.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/gimphistogram.h"
#include "base/gimplut.h"
#include "base/levels.h"
#include "gegl/gimplevelsconfig.h"
#include "gegl/gimpoperationlevels.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-histogram.h"
#include "core/gimpimage.h"
#include "core/gimpimagemap.h"
#include "widgets/gimpcolorbar.h"
#include "widgets/gimphandlebar.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimphistogramview.h"
#include "display/gimpdisplay.h"
#include "gimphistogramoptions.h"
#include "gimplevelstool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
#define PICK_LOW_INPUT (1 << 0)
#define PICK_GAMMA (1 << 1)
#define PICK_HIGH_INPUT (1 << 2)
#define PICK_ALL_CHANNELS (1 << 8)
#define HISTOGRAM_WIDTH 256
#define GRADIENT_HEIGHT 12
#define CONTROL_HEIGHT 10
/* local function prototypes */
static void gimp_levels_tool_finalize (GObject *object);
static gboolean gimp_levels_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static void gimp_levels_tool_color_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
GimpImageType sample_type,
GimpRGB *color,
gint color_index);
static GeglNode * gimp_levels_tool_get_operation (GimpImageMapTool *im_tool);
static void gimp_levels_tool_map (GimpImageMapTool *im_tool);
static void gimp_levels_tool_dialog (GimpImageMapTool *im_tool);
static void gimp_levels_tool_dialog_unmap (GtkWidget *dialog,
GimpLevelsTool *tool);
static void gimp_levels_tool_reset (GimpImageMapTool *im_tool);
static gboolean gimp_levels_tool_settings_load (GimpImageMapTool *im_tool,
gpointer fp,
GError **error);
static gboolean gimp_levels_tool_settings_save (GimpImageMapTool *im_tool,
gpointer fp);
static void levels_update_adjustments (GimpLevelsTool *tool);
static void levels_update_input_bar (GimpLevelsTool *tool);
static void levels_channel_callback (GtkWidget *widget,
GimpLevelsTool *tool);
static void levels_channel_reset_callback (GtkWidget *widget,
GimpLevelsTool *tool);
static gboolean levels_menu_sensitivity (gint value,
gpointer data);
static void levels_stretch_callback (GtkWidget *widget,
GimpLevelsTool *tool);
static void levels_low_input_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool);
static void levels_gamma_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool);
static void levels_linear_gamma_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool);
static void levels_high_input_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool);
static void levels_low_output_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool);
static void levels_high_output_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool);
static void levels_input_picker_toggled (GtkWidget *widget,
GimpLevelsTool *tool);
G_DEFINE_TYPE (GimpLevelsTool, gimp_levels_tool, GIMP_TYPE_IMAGE_MAP_TOOL)
#define parent_class gimp_levels_tool_parent_class
void
gimp_levels_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_LEVELS_TOOL,
GIMP_TYPE_HISTOGRAM_OPTIONS,
gimp_color_options_gui,
0,
"gimp-levels-tool",
_("Levels"),
_("Levels Tool: Adjust color levels"),
N_("_Levels..."), NULL,
NULL, GIMP_HELP_TOOL_LEVELS,
GIMP_STOCK_TOOL_LEVELS,
data);
}
static void
gimp_levels_tool_class_init (GimpLevelsToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpColorToolClass *color_tool_class = GIMP_COLOR_TOOL_CLASS (klass);
GimpImageMapToolClass *im_tool_class = GIMP_IMAGE_MAP_TOOL_CLASS (klass);
object_class->finalize = gimp_levels_tool_finalize;
tool_class->initialize = gimp_levels_tool_initialize;
color_tool_class->picked = gimp_levels_tool_color_picked;
im_tool_class->shell_desc = _("Adjust Color Levels");
im_tool_class->settings_name = "levels";
im_tool_class->load_dialog_title = _("Load Levels");
im_tool_class->load_button_tip = _("Load levels settings from file");
im_tool_class->save_dialog_title = _("Save Levels");
im_tool_class->save_button_tip = _("Save levels settings to file");
im_tool_class->get_operation = gimp_levels_tool_get_operation;
im_tool_class->map = gimp_levels_tool_map;
im_tool_class->dialog = gimp_levels_tool_dialog;
im_tool_class->reset = gimp_levels_tool_reset;
im_tool_class->settings_load = gimp_levels_tool_settings_load;
im_tool_class->settings_save = gimp_levels_tool_settings_save;
}
static void
gimp_levels_tool_init (GimpLevelsTool *tool)
{
GimpImageMapTool *im_tool = GIMP_IMAGE_MAP_TOOL (tool);
tool->lut = gimp_lut_new ();
tool->hist = NULL;
tool->channel = GIMP_HISTOGRAM_VALUE;
tool->active_picker = NULL;
im_tool->apply_func = (GimpImageMapApplyFunc) gimp_lut_process;
im_tool->apply_data = tool->lut;
}
static void
gimp_levels_tool_finalize (GObject *object)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (object);
if (tool->config)
{
g_object_unref (tool->config);
tool->config = NULL;
}
gimp_lut_free (tool->lut);
if (tool->hist)
{
gimp_histogram_free (tool->hist);
tool->hist = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_levels_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (tool);
GimpDrawable *drawable = gimp_image_get_active_drawable (display->image);
if (! drawable)
return FALSE;
if (gimp_drawable_is_indexed (drawable))
{
g_set_error (error, 0, 0,
_("Levels does not operate on indexed layers."));
return FALSE;
}
if (! l_tool->hist)
l_tool->hist = gimp_histogram_new ();
gimp_levels_config_reset (l_tool->config);
l_tool->channel = l_tool->config->channel;
l_tool->color = gimp_drawable_is_rgb (drawable);
l_tool->alpha = gimp_drawable_has_alpha (drawable);
if (l_tool->active_picker)
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (l_tool->active_picker),
FALSE);
GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error);
gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (l_tool->channel_menu),
levels_menu_sensitivity, l_tool, NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (l_tool->channel_menu),
l_tool->channel);
levels_update_adjustments (l_tool);
gimp_drawable_calculate_histogram (drawable, l_tool->hist);
gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (l_tool->hist_view),
l_tool->hist);
return TRUE;
}
static GeglNode *
gimp_levels_tool_get_operation (GimpImageMapTool *im_tool)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (im_tool);
GeglNode *node;
node = g_object_new (GEGL_TYPE_NODE,
"operation", "gimp-levels",
NULL);
tool->config = g_object_new (GIMP_TYPE_LEVELS_CONFIG, NULL);
gegl_node_set (node,
"config", tool->config,
NULL);
return node;
}
static void
gimp_levels_tool_map (GimpImageMapTool *image_map_tool)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (image_map_tool);
Levels levels;
gimp_levels_config_to_cruft (tool->config, &levels, tool->color);
gimp_lut_setup (tool->lut,
(GimpLutFunc) levels_lut_func,
&levels,
gimp_drawable_bytes (image_map_tool->drawable));
}
/*******************/
/* Levels dialog */
/*******************/
static GtkWidget *
gimp_levels_tool_color_picker_new (GimpLevelsTool *tool,
guint value)
{
GtkWidget *button;
GtkWidget *image;
const gchar *stock_id;
const gchar *help;
switch (value & 0xF)
{
case PICK_LOW_INPUT:
stock_id = GIMP_STOCK_COLOR_PICKER_BLACK;
help = _("Pick black point");
break;
case PICK_GAMMA:
stock_id = GIMP_STOCK_COLOR_PICKER_GRAY;
help = _("Pick gray point");
break;
case PICK_HIGH_INPUT:
stock_id = GIMP_STOCK_COLOR_PICKER_WHITE;
help = _("Pick white point");
break;
default:
return NULL;
}
button = g_object_new (GTK_TYPE_TOGGLE_BUTTON,
"draw-indicator", FALSE,
NULL);
image = gtk_image_new_from_stock (stock_id, GTK_ICON_SIZE_BUTTON);
gtk_misc_set_padding (GTK_MISC (image), 2, 2);
gtk_container_add (GTK_CONTAINER (button), image);
gtk_widget_show (image);
gimp_help_set_help_data (button, help, NULL);
g_object_set_data (G_OBJECT (button),
"pick-value", GUINT_TO_POINTER (value));
g_signal_connect (button, "toggled",
G_CALLBACK (levels_input_picker_toggled),
tool);
return button;
}
static void
gimp_levels_tool_dialog (GimpImageMapTool *image_map_tool)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (image_map_tool);
GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (image_map_tool);
GtkListStore *store;
GtkWidget *vbox;
GtkWidget *vbox2;
GtkWidget *vbox3;
GtkWidget *hbox;
GtkWidget *hbox2;
GtkWidget *label;
GtkWidget *menu;
GtkWidget *frame;
GtkWidget *hbbox;
GtkWidget *button;
GtkWidget *spinbutton;
GtkWidget *bar;
GtkObject *data;
gint border;
/* The option menu for selecting channels */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (image_map_tool->main_vbox), hbox,
FALSE, FALSE, 0);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("Cha_nnel:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
store = gimp_enum_store_new_with_range (GIMP_TYPE_HISTOGRAM_CHANNEL,
GIMP_HISTOGRAM_VALUE,
GIMP_HISTOGRAM_ALPHA);
menu = gimp_enum_combo_box_new_with_model (GIMP_ENUM_STORE (store));
g_object_unref (store);
g_signal_connect (menu, "changed",
G_CALLBACK (levels_channel_callback),
tool);
gimp_enum_combo_box_set_stock_prefix (GIMP_ENUM_COMBO_BOX (menu),
"gimp-channel");
gtk_box_pack_start (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
gtk_widget_show (menu);
tool->channel_menu = menu;
gtk_label_set_mnemonic_widget (GTK_LABEL (label), menu);
button = gtk_button_new_with_mnemonic (_("R_eset Channel"));
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_channel_reset_callback),
tool);
menu = gimp_prop_enum_stock_box_new (G_OBJECT (tool_options),
"histogram-scale", "gimp-histogram",
0, 0);
gtk_box_pack_end (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
gtk_widget_show (menu);
/* Input levels frame */
frame = gimp_frame_new (_("Input Levels"));
gtk_box_pack_start (GTK_BOX (image_map_tool->main_vbox), frame,
TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox2 = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
gtk_widget_show (vbox2);
tool->hist_view = gimp_histogram_view_new (FALSE);
gtk_box_pack_start (GTK_BOX (vbox2), tool->hist_view, TRUE, TRUE, 0);
gtk_widget_show (GTK_WIDGET (tool->hist_view));
gimp_histogram_options_connect_view (GIMP_HISTOGRAM_OPTIONS (tool_options),
GIMP_HISTOGRAM_VIEW (tool->hist_view));
g_object_get (tool->hist_view, "border-width", &border, NULL);
vbox3 = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox3), border);
gtk_box_pack_start (GTK_BOX (vbox2), vbox3, FALSE, FALSE, 0);
gtk_widget_show (vbox3);
tool->input_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
gtk_widget_set_size_request (tool->input_bar, -1, GRADIENT_HEIGHT / 2);
gtk_box_pack_start (GTK_BOX (vbox3), tool->input_bar, FALSE, FALSE, 0);
gtk_widget_show (tool->input_bar);
bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
gtk_widget_set_size_request (bar, -1, GRADIENT_HEIGHT / 2);
gtk_box_pack_start (GTK_BOX (vbox3), bar, FALSE, FALSE, 0);
gtk_widget_show (bar);
tool->input_sliders = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
gtk_widget_set_size_request (tool->input_sliders, -1, CONTROL_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox3), tool->input_sliders, FALSE, FALSE, 0);
gtk_widget_show (tool->input_sliders);
g_signal_connect_swapped (tool->input_bar, "button-press-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->input_sliders)->button_press_event),
tool->input_sliders);
g_signal_connect_swapped (tool->input_bar, "button-release-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->input_sliders)->button_release_event),
tool->input_sliders);
g_signal_connect_swapped (tool->input_bar, "motion-notify-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->input_sliders)->motion_notify_event),
tool->input_sliders);
g_signal_connect_swapped (bar, "button-press-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->input_sliders)->button_press_event),
tool->input_sliders);
g_signal_connect_swapped (bar, "button-release-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->input_sliders)->button_release_event),
tool->input_sliders);
g_signal_connect_swapped (bar, "motion-notify-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->input_sliders)->motion_notify_event),
tool->input_sliders);
/* Horizontal box for input levels spinbuttons */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* low input spin */
hbox2 = gtk_hbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_levels_tool_color_picker_new (tool, PICK_LOW_INPUT);
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
spinbutton = gimp_spin_button_new (&data, 0, 0, 255, 1, 10, 10, 0.5, 0);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
tool->low_input = GTK_ADJUSTMENT (data);
g_signal_connect (tool->low_input, "value-changed",
G_CALLBACK (levels_low_input_changed),
tool);
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (tool->input_sliders), 0,
tool->low_input);
/* input gamma spin */
spinbutton = gimp_spin_button_new (&data, 1, 0.1, 10, 0.01, 0.1, 1, 0.5, 2);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, TRUE, FALSE, 0);
gimp_help_set_help_data (spinbutton, _("Gamma"), NULL);
gtk_widget_show (spinbutton);
tool->gamma = GTK_ADJUSTMENT (data);
g_signal_connect (tool->gamma, "value-changed",
G_CALLBACK (levels_gamma_changed),
tool);
tool->gamma_linear = GTK_ADJUSTMENT (gtk_adjustment_new (127, 0, 255,
0.1, 1.0, 0.0));
g_signal_connect (tool->gamma_linear, "value-changed",
G_CALLBACK (levels_linear_gamma_changed),
tool);
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (tool->input_sliders), 1,
tool->gamma_linear);
g_object_unref (tool->gamma_linear);
/* high input spin */
hbox2 = gtk_hbox_new (FALSE, 2);
gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_levels_tool_color_picker_new (tool, PICK_HIGH_INPUT);
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
spinbutton = gimp_spin_button_new (&data, 255, 0, 255, 1, 10, 10, 0.5, 0);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
tool->high_input = GTK_ADJUSTMENT (data);
g_signal_connect (tool->high_input, "value-changed",
G_CALLBACK (levels_high_input_changed),
tool);
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (tool->input_sliders), 2,
tool->high_input);
/* Output levels frame */
frame = gimp_frame_new (_("Output Levels"));
gtk_box_pack_start (GTK_BOX (image_map_tool->main_vbox), frame,
FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gtk_vbox_new (FALSE, 4);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox2 = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox2), border);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
gtk_widget_show (vbox2);
tool->output_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
gtk_widget_set_size_request (tool->output_bar, -1, GRADIENT_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox2), tool->output_bar, FALSE, FALSE, 0);
gtk_widget_show (tool->output_bar);
tool->output_sliders = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
gtk_widget_set_size_request (tool->output_sliders, -1, CONTROL_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox2), tool->output_sliders, FALSE, FALSE, 0);
gtk_widget_show (tool->output_sliders);
g_signal_connect_swapped (tool->output_bar, "button-press-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->output_sliders)->button_press_event),
tool->output_sliders);
g_signal_connect_swapped (tool->output_bar, "button-release-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->output_sliders)->button_release_event),
tool->output_sliders);
g_signal_connect_swapped (tool->output_bar, "motion-notify-event",
G_CALLBACK (GTK_WIDGET_GET_CLASS (tool->output_sliders)->motion_notify_event),
tool->output_sliders);
/* Horizontal box for levels spin widgets */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* low output spin */
spinbutton = gimp_spin_button_new (&data, 0, 0, 255, 1, 10, 10, 0.5, 0);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
tool->low_output = GTK_ADJUSTMENT (data);
g_signal_connect (tool->low_output, "value-changed",
G_CALLBACK (levels_low_output_changed),
tool);
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (tool->output_sliders), 0,
tool->low_output);
/* high output spin */
spinbutton = gimp_spin_button_new (&data, 255, 0, 255, 1, 10, 10, 0.5, 0);
gtk_box_pack_end (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
tool->high_output = GTK_ADJUSTMENT (data);
g_signal_connect (tool->high_output, "value-changed",
G_CALLBACK (levels_high_output_changed),
tool);
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (tool->output_sliders), 2,
tool->high_output);
/* all channels frame */
frame = gimp_frame_new (_("All Channels"));
gtk_box_pack_end (GTK_BOX (image_map_tool->main_vbox), frame,
FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
hbbox = gtk_hbutton_box_new ();
gtk_box_set_spacing (GTK_BOX (hbbox), 4);
gtk_box_pack_start (GTK_BOX (hbox), hbbox, FALSE, FALSE, 0);
gtk_widget_show (hbbox);
gtk_box_pack_start (GTK_BOX (hbbox), image_map_tool->load_button,
FALSE, FALSE, 0);
gtk_widget_show (image_map_tool->load_button);
gtk_box_pack_start (GTK_BOX (hbbox), image_map_tool->save_button,
FALSE, FALSE, 0);
gtk_widget_show (image_map_tool->save_button);
hbbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_end (GTK_BOX (hbox), hbbox, FALSE, FALSE, 0);
gtk_widget_show (hbbox);
button = gtk_button_new_with_mnemonic (_("_Auto"));
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gimp_help_set_help_data (button, _("Adjust levels automatically"), NULL);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_stretch_callback),
tool);
button = gimp_levels_tool_color_picker_new (tool,
PICK_LOW_INPUT | PICK_ALL_CHANNELS);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_levels_tool_color_picker_new (tool,
PICK_GAMMA | PICK_ALL_CHANNELS);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_levels_tool_color_picker_new (tool,
PICK_HIGH_INPUT | PICK_ALL_CHANNELS);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_signal_connect (image_map_tool->shell, "unmap",
G_CALLBACK (gimp_levels_tool_dialog_unmap),
tool);
}
static void
gimp_levels_tool_dialog_unmap (GtkWidget *dialog,
GimpLevelsTool *tool)
{
if (tool->active_picker)
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (tool->active_picker),
FALSE);
}
static void
gimp_levels_tool_reset (GimpImageMapTool *image_map_tool)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (image_map_tool);
gimp_levels_config_reset (tool->config);
levels_update_adjustments (tool);
}
static gboolean
gimp_levels_tool_settings_load (GimpImageMapTool *image_map_tool,
gpointer fp,
GError **error)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (image_map_tool);
FILE *file = fp;
gint low_input[5];
gint high_input[5];
gint low_output[5];
gint high_output[5];
gdouble gamma[5];
gint i, fields;
gchar buf[50];
gchar *nptr;
if (! fgets (buf, sizeof (buf), file) ||
strcmp (buf, "# GIMP Levels File\n") != 0)
{
g_set_error (error, GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("not a GIMP Levels file"));
return FALSE;
}
for (i = 0; i < 5; i++)
{
fields = fscanf (file, "%d %d %d %d ",
&low_input[i],
&high_input[i],
&low_output[i],
&high_output[i]);
if (fields != 4)
goto error;
if (! fgets (buf, 50, file))
goto error;
gamma[i] = g_ascii_strtod (buf, &nptr);
if (buf == nptr || errno == ERANGE)
goto error;
}
for (i = 0; i < 5; i++)
{
g_object_set (tool->config,
"channel", i,
NULL);
g_object_set (tool->config,
"low-input", low_input[i] / 255.0,
"high-input", high_input[i] / 255.0,
"low-output", low_output[i] / 255.0,
"high-output", high_output[i] / 255.0,
"gamma", gamma[i],
NULL);
}
g_object_set (tool->config,
"channel", tool->channel,
NULL);
levels_update_adjustments (tool);
return TRUE;
error:
g_set_error (error, GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("parse error"));
return FALSE;
}
static gboolean
gimp_levels_tool_settings_save (GimpImageMapTool *image_map_tool,
gpointer fp)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (image_map_tool);
FILE *file = fp;
gint i;
fprintf (file, "# GIMP Levels File\n");
for (i = 0; i < 5; i++)
{
gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
fprintf (file, "%d %d %d %d %s\n",
(gint) (tool->config->low_input[i] * 255.999),
(gint) (tool->config->high_input[i] * 255.999),
(gint) (tool->config->low_output[i] * 255.999),
(gint) (tool->config->high_output[i] * 255.999),
g_ascii_formatd (buf, G_ASCII_DTOSTR_BUF_SIZE, "%f",
tool->config->gamma[i]));
}
return TRUE;
}
static void
levels_update_adjustments (GimpLevelsTool *tool)
{
tool->low_input->upper = 255;
tool->high_input->lower = 0;
tool->gamma_linear->lower = 0;
tool->gamma_linear->upper = 255;
gtk_adjustment_set_value (tool->low_input,
tool->config->low_input[tool->channel] * 255.0);
gtk_adjustment_set_value (tool->gamma,
tool->config->gamma[tool->channel]);
gtk_adjustment_set_value (tool->high_input,
tool->config->high_input[tool->channel] * 255.0);
tool->low_input->upper = tool->high_input->value;
tool->high_input->lower = tool->low_input->value;
tool->gamma_linear->lower = tool->low_input->value;
tool->gamma_linear->upper = tool->high_input->value;
gtk_adjustment_changed (tool->low_input);
gtk_adjustment_changed (tool->high_input);
gtk_adjustment_changed (tool->gamma_linear);
gtk_adjustment_set_value (tool->low_output,
tool->config->low_output[tool->channel] * 255.0);
gtk_adjustment_set_value (tool->high_output,
tool->config->high_output[tool->channel] * 255.0);
levels_update_input_bar (tool);
}
static void
levels_update_input_bar (GimpLevelsTool *tool)
{
switch (tool->channel)
{
case GIMP_HISTOGRAM_VALUE:
case GIMP_HISTOGRAM_ALPHA:
case GIMP_HISTOGRAM_RGB:
{
guchar v[256];
gint i;
for (i = 0; i < 256; i++)
{
v[i] = gimp_operation_levels_map_input (tool->config,
tool->channel,
i / 255.0) * 255.999;
}
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
v, v, v);
}
break;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
{
guchar r[256];
guchar g[256];
guchar b[256];
gint i;
for (i = 0; i < 256; i++)
{
r[i] = gimp_operation_levels_map_input (tool->config,
GIMP_HISTOGRAM_RED,
i / 255.0) * 255.999;
g[i] = gimp_operation_levels_map_input (tool->config,
GIMP_HISTOGRAM_GREEN,
i / 255.0) * 255.999;
b[i] = gimp_operation_levels_map_input (tool->config,
GIMP_HISTOGRAM_BLUE,
i / 255.0) * 255.999;
}
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
r, g, b);
}
break;
}
}
static void
levels_channel_callback (GtkWidget *widget,
GimpLevelsTool *tool)
{
gint value;
if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value))
{
tool->channel = value;
g_object_set (tool->config,
"channel", tool->channel,
NULL);
gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (tool->hist_view),
tool->channel);
gimp_color_bar_set_channel (GIMP_COLOR_BAR (tool->output_bar),
tool->channel);
levels_update_adjustments (tool);
}
}
static void
levels_channel_reset_callback (GtkWidget *widget,
GimpLevelsTool *tool)
{
gimp_levels_config_reset_channel (tool->config, tool->channel);
levels_update_adjustments (tool);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
static gboolean
levels_menu_sensitivity (gint value,
gpointer data)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (data);
GimpHistogramChannel channel = value;
switch (channel)
{
case GIMP_HISTOGRAM_VALUE:
return TRUE;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
return tool->color;
case GIMP_HISTOGRAM_ALPHA:
return tool->alpha;
case GIMP_HISTOGRAM_RGB:
return FALSE;
}
return FALSE;
}
static void
levels_stretch_callback (GtkWidget *widget,
GimpLevelsTool *tool)
{
gimp_levels_config_stretch (tool->config, tool->hist, tool->color);
levels_update_adjustments (tool);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
static void
levels_linear_gamma_update (GimpLevelsTool *tool)
{
gdouble delta, mid, tmp, value;
delta = (tool->high_input->value - tool->low_input->value) / 2.0;
mid = tool->low_input->value + delta;
tmp = log10 (1.0 / tool->config->gamma[tool->channel]);
value = mid + delta * tmp;
gtk_adjustment_set_value (tool->gamma_linear, value);
}
static void
levels_linear_gamma_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool)
{
gdouble delta, mid, tmp, value;
delta = (tool->high_input->value - tool->low_input->value) / 2.0;
if (delta >= 0.5)
{
mid = tool->low_input->value + delta;
tmp = (adjustment->value - mid) / delta;
value = 1.0 / pow (10, tmp);
/* round the gamma value to the nearest 1/100th */
value = floor (value * 100 + 0.5) / 100.0;
gtk_adjustment_set_value (tool->gamma, value);
}
}
static void
levels_low_input_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool)
{
gint value = ROUND (adjustment->value);
tool->high_input->lower = value;
tool->gamma_linear->lower = value;
gtk_adjustment_changed (tool->high_input);
gtk_adjustment_changed (tool->gamma_linear);
if (tool->config->low_input[tool->channel] != value / 255.0)
{
g_object_set (tool->config,
"low-input", value / 255.0,
NULL);
levels_update_input_bar (tool);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
levels_linear_gamma_update (tool);
}
static void
levels_gamma_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool)
{
if (tool->config->gamma[tool->channel] != adjustment->value)
{
g_object_set (tool->config,
"gamma", adjustment->value,
NULL);
levels_update_input_bar (tool);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
levels_linear_gamma_update (tool);
}
static void
levels_high_input_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool)
{
gint value = ROUND (adjustment->value);
tool->low_input->upper = value;
tool->gamma_linear->upper = value;
gtk_adjustment_changed (tool->low_input);
gtk_adjustment_changed (tool->gamma_linear);
if (tool->config->high_input[tool->channel] != value / 255.0)
{
g_object_set (tool->config,
"high-input", value / 255.0,
NULL);
levels_update_input_bar (tool);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
levels_linear_gamma_update (tool);
}
static void
levels_low_output_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool)
{
gint value = ROUND (adjustment->value);
if (tool->config->low_output[tool->channel] != value / 255.0)
{
g_object_set (tool->config,
"low-output", value / 255.0,
NULL);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
}
static void
levels_high_output_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool)
{
gint value = ROUND (adjustment->value);
if (tool->config->high_output[tool->channel] != value / 255.0)
{
g_object_set (tool->config,
"high-output", value / 255.0,
NULL);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
}
static void
levels_input_picker_toggled (GtkWidget *widget,
GimpLevelsTool *tool)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
{
if (tool->active_picker == widget)
return;
if (tool->active_picker)
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (tool->active_picker),
FALSE);
tool->active_picker = widget;
gimp_color_tool_enable (GIMP_COLOR_TOOL (tool),
GIMP_COLOR_TOOL_GET_OPTIONS (tool));
}
else if (tool->active_picker == widget)
{
tool->active_picker = NULL;
gimp_color_tool_disable (GIMP_COLOR_TOOL (tool));
}
}
static void
levels_input_adjust_by_color (GimpLevelsConfig *config,
guint value,
GimpHistogramChannel channel,
const GimpRGB *color)
{
switch (value & 0xF)
{
case PICK_LOW_INPUT:
gimp_levels_config_adjust_by_colors (config, channel, color, NULL, NULL);
break;
case PICK_GAMMA:
gimp_levels_config_adjust_by_colors (config, channel, NULL, color, NULL);
break;
case PICK_HIGH_INPUT:
gimp_levels_config_adjust_by_colors (config, channel, NULL, NULL, color);
break;
default:
break;
}
}
static void
gimp_levels_tool_color_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
GimpImageType sample_type,
GimpRGB *color,
gint color_index)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (color_tool);
guint value;
value = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (tool->active_picker),
"pick-value"));
if (value & PICK_ALL_CHANNELS && GIMP_IMAGE_TYPE_IS_RGB (sample_type))
{
GimpHistogramChannel channel;
/* first reset the value channel */
switch (value & 0xF)
{
case PICK_LOW_INPUT:
tool->config->low_input[GIMP_HISTOGRAM_VALUE] = 0.0;
break;
case PICK_GAMMA:
tool->config->gamma[GIMP_HISTOGRAM_VALUE] = 1.0;
break;
case PICK_HIGH_INPUT:
tool->config->high_input[GIMP_HISTOGRAM_VALUE] = 1.0;
break;
default:
break;
}
/* then adjust all color channels */
for (channel = GIMP_HISTOGRAM_RED;
channel <= GIMP_HISTOGRAM_BLUE;
channel++)
{
levels_input_adjust_by_color (tool->config,
value, channel, color);
}
}
else
{
levels_input_adjust_by_color (tool->config,
value, tool->channel, color);
}
levels_update_adjustments (tool);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
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