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gimp/app/tools/gimplevelstool.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 "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/gimphistogram.h"
#include "base/gimplut.h"
#include "base/levels.h"
#include "config/gimpbaseconfig.h"
#include "core/gimp.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-histogram.h"
#include "core/gimpimage.h"
#include "core/gimpimagemap.h"
#include "core/gimptoolinfo.h"
#include "widgets/gimpenummenu.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 LOW_INPUT (1 << 0)
#define GAMMA (1 << 1)
#define HIGH_INPUT (1 << 2)
#define LOW_OUTPUT (1 << 3)
#define HIGH_OUTPUT (1 << 4)
#define INPUT_LEVELS (1 << 5)
#define OUTPUT_LEVELS (1 << 6)
#define INPUT_SLIDERS (1 << 7)
#define OUTPUT_SLIDERS (1 << 8)
#define DRAW (1 << 9)
#define ALL_CHANNELS (1 << 10)
#define ALL 0xFFF
#define HISTOGRAM_WIDTH 256
#define GRADIENT_HEIGHT 12
#define CONTROL_HEIGHT 8
#define LEVELS_DRAWING_AREA_MASK (GDK_EXPOSURE_MASK | \
GDK_ENTER_NOTIFY_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON1_MOTION_MASK | \
GDK_POINTER_MOTION_HINT_MASK)
/* local function prototypes */
static void gimp_levels_tool_class_init (GimpLevelsToolClass *klass);
static void gimp_levels_tool_init (GimpLevelsTool *tool);
static void gimp_levels_tool_finalize (GObject *object);
static gboolean gimp_levels_tool_initialize (GimpTool *tool,
GimpDisplay *gdisp);
static void gimp_levels_tool_color_picked (GimpColorTool *color_tool,
GimpImageType sample_type,
GimpRGB *color,
gint color_index);
static void gimp_levels_tool_map (GimpImageMapTool *image_map_tool);
static void gimp_levels_tool_dialog (GimpImageMapTool *image_map_tool);
static void gimp_levels_tool_reset (GimpImageMapTool *image_map_tool);
static void levels_update (GimpLevelsTool *l_tool,
gint update);
static void levels_channel_callback (GtkWidget *widget,
GimpLevelsTool *l_tool);
static void levels_channel_reset_callback (GtkWidget *widget,
GimpLevelsTool *l_tool);
static gboolean levels_set_sensitive_callback (GimpHistogramChannel channel,
GimpLevelsTool *l_tool);
static void levels_auto_callback (GtkWidget *widget,
GimpLevelsTool *l_tool);
static void levels_load_callback (GtkWidget *widget,
GimpLevelsTool *l_tool);
static void levels_save_callback (GtkWidget *widget,
GimpLevelsTool *l_tool);
static void levels_low_input_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool);
static void levels_gamma_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool);
static void levels_high_input_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool);
static void levels_low_output_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool);
static void levels_high_output_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool);
static void levels_input_picker_toggled (GtkWidget *widget,
GimpLevelsTool *l_tool);
static gint levels_input_area_event (GtkWidget *widget,
GdkEvent *event,
GimpLevelsTool *l_tool);
static gboolean levels_input_area_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpLevelsTool *l_tool);
static gint levels_output_area_event (GtkWidget *widget,
GdkEvent *event,
GimpLevelsTool *l_tool);
static gboolean levels_output_area_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpLevelsTool *l_tool);
static void file_dialog_create (GimpLevelsTool *l_tool);
static void file_dialog_response (GtkWidget *dialog,
gint response_id,
GimpLevelsTool *l_tool);
static gboolean levels_read_from_file (GimpLevelsTool *l_tool,
FILE *f);
static void levels_write_to_file (GimpLevelsTool *l_tool,
FILE *f);
static GimpImageMapToolClass *parent_class = NULL;
/* public functions */
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"),
_("Adjust color levels"),
N_("/Tools/Color Tools/_Levels..."), NULL,
NULL, GIMP_HELP_TOOL_LEVELS,
GIMP_STOCK_TOOL_LEVELS,
data);
}
GType
gimp_levels_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpLevelsToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_levels_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpLevelsTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_levels_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_IMAGE_MAP_TOOL,
"GimpLevelsTool",
&tool_info, 0);
}
return tool_type;
}
/* private functions */
static void
gimp_levels_tool_class_init (GimpLevelsToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
GimpColorToolClass *color_tool_class;
GimpImageMapToolClass *image_map_tool_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
color_tool_class = GIMP_COLOR_TOOL_CLASS (klass);
image_map_tool_class = GIMP_IMAGE_MAP_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_levels_tool_finalize;
tool_class->initialize = gimp_levels_tool_initialize;
color_tool_class->picked = gimp_levels_tool_color_picked;
image_map_tool_class->map = gimp_levels_tool_map;
image_map_tool_class->dialog = gimp_levels_tool_dialog;
image_map_tool_class->reset = gimp_levels_tool_reset;
}
static void
gimp_levels_tool_init (GimpLevelsTool *l_tool)
{
GimpImageMapTool *image_map_tool = GIMP_IMAGE_MAP_TOOL (l_tool);
image_map_tool->shell_desc = _("Adjust Color Levels");
l_tool->lut = gimp_lut_new ();
l_tool->levels = g_new0 (Levels, 1);
l_tool->hist = NULL;
l_tool->channel = GIMP_HISTOGRAM_VALUE;
l_tool->active_picker = NULL;
levels_init (l_tool->levels);
}
static void
gimp_levels_tool_finalize (GObject *object)
{
GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (object);
if (l_tool->lut)
{
gimp_lut_free (l_tool->lut);
l_tool->lut = NULL;
}
if (l_tool->levels)
{
g_free (l_tool->levels);
l_tool->levels = NULL;
}
if (l_tool->hist)
{
gimp_histogram_free (l_tool->hist);
l_tool->hist = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_levels_tool_initialize (GimpTool *tool,
GimpDisplay *gdisp)
{
GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (tool);
GimpDrawable *drawable;
drawable = gimp_image_active_drawable (gdisp->gimage);
if (! drawable)
return FALSE;
if (gimp_drawable_is_indexed (drawable))
{
g_message (_("Levels for indexed layers cannot be adjusted."));
return FALSE;
}
if (!l_tool->hist)
{
Gimp *gimp = GIMP_TOOL (l_tool)->tool_info->gimp;
l_tool->hist = gimp_histogram_new (GIMP_BASE_CONFIG (gimp->config));
}
levels_init (l_tool->levels);
l_tool->channel = GIMP_HISTOGRAM_VALUE;
l_tool->color = gimp_drawable_is_rgb (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, gdisp);
/* set the sensitivity of the channel menu based on the drawable type */
gimp_int_option_menu_set_sensitive (GTK_OPTION_MENU (l_tool->channel_menu),
(GimpIntOptionMenuSensitivityCallback) levels_set_sensitive_callback,
l_tool);
/* set the current selection */
gtk_option_menu_set_history (GTK_OPTION_MENU (l_tool->channel_menu),
l_tool->channel);
levels_update (l_tool, ALL);
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 void
gimp_levels_tool_map (GimpImageMapTool *image_map_tool)
{
GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (image_map_tool);
gimp_image_map_apply (image_map_tool->image_map,
(GimpImageMapApplyFunc) gimp_lut_process_2,
l_tool->lut);
}
/*******************/
/* Levels dialog */
/*******************/
static GtkWidget *
gimp_levels_tool_color_picker_new (GimpLevelsTool *tool,
guint value)
{
GtkWidget *button;
const gchar *stock_id;
const gchar *help;
switch (value & 0xF)
{
case LOW_INPUT:
stock_id = GIMP_STOCK_COLOR_PICKER_BLACK;
help = _("Pick Black Point");
break;
case GAMMA:
stock_id = GIMP_STOCK_COLOR_PICKER_GRAY;
help = _("Pick Gray Point");
break;
case 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,
"label", stock_id,
"use_stock", TRUE,
"draw_indicator", FALSE,
NULL);
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 *l_tool = GIMP_LEVELS_TOOL (image_map_tool);
GimpToolOptions *tool_options;
GtkWidget *vbox;
GtkWidget *vbox2;
GtkWidget *vbox3;
GtkWidget *hbox;
GtkWidget *hbox2;
GtkWidget *label;
GtkWidget *menu;
GtkWidget *frame;
GtkWidget *channel_hbox;
GtkWidget *hbbox;
GtkWidget *button;
GtkWidget *spinbutton;
GtkObject *data;
hbox = gtk_hbox_new (TRUE, 0);
gtk_box_pack_start (GTK_BOX (image_map_tool->main_vbox), hbox,
TRUE, TRUE, 0);
gtk_widget_show (hbox);
vbox = gtk_vbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
gtk_widget_show (vbox);
/* The option menu for selecting channels */
channel_hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox), channel_hbox, FALSE, FALSE, 0);
gtk_widget_show (channel_hbox);
label = gtk_label_new (_("Modify Levels for Channel:"));
gtk_box_pack_start (GTK_BOX (channel_hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
menu = gimp_enum_option_menu_new (GIMP_TYPE_HISTOGRAM_CHANNEL,
G_CALLBACK (levels_channel_callback),
l_tool);
gimp_enum_option_menu_set_stock_prefix (GTK_OPTION_MENU (menu),
"gimp-channel");
gtk_box_pack_start (GTK_BOX (channel_hbox), menu, FALSE, FALSE, 0);
gtk_widget_show (menu);
l_tool->channel_menu = menu;
button = gtk_button_new_with_mnemonic (_("R_eset Channel"));
gtk_box_pack_start (GTK_BOX (channel_hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_channel_reset_callback),
l_tool);
/* Input levels frame */
frame = gtk_frame_new (_("Input Levels"));
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (TRUE, 2);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
vbox2 = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (vbox2), 2);
gtk_box_pack_start (GTK_BOX (hbox), vbox2, TRUE, FALSE, 0);
gtk_widget_show (vbox2);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox2), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
l_tool->hist_view = gimp_histogram_view_new (FALSE);
gtk_container_add (GTK_CONTAINER (frame), l_tool->hist_view);
gtk_widget_show (GTK_WIDGET (l_tool->hist_view));
tool_options = GIMP_TOOL (l_tool)->tool_info->tool_options;
gimp_histogram_options_connect_view (GIMP_HISTOGRAM_OPTIONS (tool_options),
GIMP_HISTOGRAM_VIEW (l_tool->hist_view));
/* The input levels drawing area */
hbox = gtk_hbox_new (TRUE, 2);
gtk_box_pack_start (GTK_BOX (vbox2), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox3 = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (frame), vbox3);
gtk_widget_show (vbox3);
l_tool->input_area[0] = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (l_tool->input_area[0]),
HISTOGRAM_WIDTH, GRADIENT_HEIGHT);
gtk_widget_set_events (l_tool->input_area[0], LEVELS_DRAWING_AREA_MASK);
gtk_box_pack_start (GTK_BOX (vbox3), l_tool->input_area[0],
FALSE, TRUE, 0);
gtk_widget_show (l_tool->input_area[0]);
g_signal_connect (l_tool->input_area[0], "event",
G_CALLBACK (levels_input_area_event),
l_tool);
l_tool->input_area[1] = gtk_drawing_area_new ();
gtk_widget_set_size_request (l_tool->input_area[1],
HISTOGRAM_WIDTH, CONTROL_HEIGHT);
gtk_widget_set_events (l_tool->input_area[1], LEVELS_DRAWING_AREA_MASK);
gtk_box_pack_start (GTK_BOX (vbox3), l_tool->input_area[1],
FALSE, TRUE, 0);
gtk_widget_show (l_tool->input_area[1]);
g_signal_connect (l_tool->input_area[1], "event",
G_CALLBACK (levels_input_area_event),
l_tool);
g_signal_connect (l_tool->input_area[1], "expose_event",
G_CALLBACK (levels_input_area_expose),
l_tool);
/* Horizontal box for input levels spinbuttons */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox2), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* low input spin */
hbox2 = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_levels_tool_color_picker_new (l_tool, LOW_INPUT);
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
data = gtk_adjustment_new (0, 0, 255, 1, 10, 10);
l_tool->low_input = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (l_tool->low_input, 0.5, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
g_signal_connect (l_tool->low_input, "value_changed",
G_CALLBACK (levels_low_input_adjustment_update),
l_tool);
/* input gamma spin */
hbox2 = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (hbox), hbox2, TRUE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_levels_tool_color_picker_new (l_tool, GAMMA);
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
data = gtk_adjustment_new (1, 0.1, 10, 0.1, 1, 1);
l_tool->gamma = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (l_tool->gamma, 0.5, 2);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gimp_help_set_help_data (spinbutton, _("Gamma"), NULL);
gtk_widget_show (spinbutton);
g_signal_connect (l_tool->gamma, "value_changed",
G_CALLBACK (levels_gamma_adjustment_update),
l_tool);
/* high input spin */
hbox2 = gtk_hbox_new (FALSE, 0);
gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_levels_tool_color_picker_new (l_tool, HIGH_INPUT);
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
data = gtk_adjustment_new (255, 0, 255, 1, 10, 10);
l_tool->high_input = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (l_tool->high_input, 0.5, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
g_signal_connect (l_tool->high_input, "value_changed",
G_CALLBACK (levels_high_input_adjustment_update),
l_tool);
/* Output levels frame */
frame = gtk_frame_new (_("Output Levels"));
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (TRUE, 2);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
vbox2 = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (vbox2), 2);
gtk_box_pack_start (GTK_BOX (hbox), vbox2, TRUE, FALSE, 0);
gtk_widget_show (vbox2);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox2), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox3 = gtk_vbox_new (FALSE, 2);
gtk_container_add (GTK_CONTAINER (frame), vbox3);
gtk_widget_show (vbox3);
l_tool->output_area[0] = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (l_tool->output_area[0]),
HISTOGRAM_WIDTH, GRADIENT_HEIGHT);
gtk_widget_set_events (l_tool->output_area[0], LEVELS_DRAWING_AREA_MASK);
gtk_box_pack_start (GTK_BOX (vbox3), l_tool->output_area[0],
FALSE, TRUE, 0);
gtk_widget_show (l_tool->output_area[0]);
g_signal_connect (l_tool->output_area[0], "event",
G_CALLBACK (levels_output_area_event),
l_tool);
l_tool->output_area[1] = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (l_tool->output_area[1]),
HISTOGRAM_WIDTH, CONTROL_HEIGHT);
gtk_widget_set_events (l_tool->output_area[1], LEVELS_DRAWING_AREA_MASK);
gtk_box_pack_start (GTK_BOX (vbox3), l_tool->output_area[1],
FALSE, TRUE, 0);
gtk_widget_show (l_tool->output_area[1]);
g_signal_connect (l_tool->output_area[1], "event",
G_CALLBACK (levels_output_area_event),
l_tool);
g_signal_connect (l_tool->output_area[1], "expose_event",
G_CALLBACK (levels_output_area_expose),
l_tool);
/* Horizontal box for levels spin widgets */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox2), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* low output spin */
data = gtk_adjustment_new (0, 0, 255, 1, 10, 10);
l_tool->low_output = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (l_tool->low_output, 0.5, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
g_signal_connect (l_tool->low_output, "value_changed",
G_CALLBACK (levels_low_output_adjustment_update),
l_tool);
/* high output spin */
data = gtk_adjustment_new (255, 0, 255, 1, 10, 10);
l_tool->high_output = GTK_ADJUSTMENT (data);
spinbutton = gtk_spin_button_new (l_tool->high_output, 0.5, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_box_pack_end (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
g_signal_connect (l_tool->high_output, "value_changed",
G_CALLBACK (levels_high_output_adjustment_update),
l_tool);
frame = gtk_frame_new (_("All Channels"));
gtk_box_pack_end (GTK_BOX (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_container_set_border_width (GTK_CONTAINER (hbbox), 2);
gtk_box_set_spacing (GTK_BOX (hbbox), 4);
gtk_button_box_set_layout (GTK_BUTTON_BOX (hbbox), GTK_BUTTONBOX_SPREAD);
gtk_box_pack_start (GTK_BOX (hbox), hbbox, FALSE, FALSE, 0);
gtk_widget_show (hbbox);
button = gtk_button_new_from_stock (GTK_STOCK_OPEN);
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gimp_help_set_help_data (button, _("Read levels settings from file"), NULL);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_load_callback),
l_tool);
button = gtk_button_new_from_stock (GTK_STOCK_SAVE);
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gimp_help_set_help_data (button, _("Save levels settings to file"), NULL);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_save_callback),
l_tool);
hbbox = gtk_hbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (hbbox), 2);
gtk_box_pack_start (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, 2);
gimp_help_set_help_data (button, _("Adjust levels automatically"), NULL);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_auto_callback),
l_tool);
button = gimp_levels_tool_color_picker_new (l_tool,
LOW_INPUT | ALL_CHANNELS);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_levels_tool_color_picker_new (l_tool, GAMMA | ALL_CHANNELS);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_levels_tool_color_picker_new (l_tool,
HIGH_INPUT | ALL_CHANNELS);
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
}
static void
gimp_levels_tool_reset (GimpImageMapTool *image_map_tool)
{
GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (image_map_tool);
levels_init (l_tool->levels);
levels_update (l_tool, ALL);
}
static void
levels_draw_slider (GdkWindow *window,
GdkGC *border_gc,
GdkGC *fill_gc,
gint xpos)
{
int y;
for (y = 0; y < CONTROL_HEIGHT; y++)
gdk_draw_line (window, fill_gc,
xpos - y / 2, y,
xpos + y / 2, y);
gdk_draw_line (window, border_gc,
xpos, 0,
xpos - (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1);
gdk_draw_line (window, border_gc,
xpos, 0,
xpos + (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1);
gdk_draw_line (window, border_gc,
xpos - (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1,
xpos + (CONTROL_HEIGHT - 1) / 2, CONTROL_HEIGHT - 1);
}
static void
levels_update (GimpLevelsTool *l_tool,
gint update)
{
gint i;
gint sel_channel;
if (l_tool->color)
{
sel_channel = l_tool->channel;
}
else
{
if (l_tool->channel == 2)
sel_channel = GIMP_HISTOGRAM_ALPHA;
else
sel_channel = GIMP_HISTOGRAM_VALUE;
}
/* Recalculate the transfer arrays */
levels_calculate_transfers (l_tool->levels);
/* set up the lut */
gimp_lut_setup (l_tool->lut,
(GimpLutFunc) levels_lut_func,
l_tool->levels,
gimp_drawable_bytes (GIMP_IMAGE_MAP_TOOL (l_tool)->drawable));
if (update & LOW_INPUT)
gtk_adjustment_set_value (l_tool->low_input,
l_tool->levels->low_input[l_tool->channel]);
if (update & GAMMA)
gtk_adjustment_set_value (l_tool->gamma,
l_tool->levels->gamma[l_tool->channel]);
if (update & HIGH_INPUT)
gtk_adjustment_set_value (l_tool->high_input,
l_tool->levels->high_input[l_tool->channel]);
if (update & LOW_OUTPUT)
gtk_adjustment_set_value (l_tool->low_output,
l_tool->levels->low_output[l_tool->channel]);
if (update & HIGH_OUTPUT)
gtk_adjustment_set_value (l_tool->high_output,
l_tool->levels->high_output[l_tool->channel]);
if (update & INPUT_LEVELS)
{
guchar buf[HISTOGRAM_WIDTH*3];
switch (sel_channel)
{
default:
g_warning ("unknown channel type, can't happen\n");
/* fall through */
case GIMP_HISTOGRAM_VALUE:
case GIMP_HISTOGRAM_ALPHA:
for (i = 0; i < HISTOGRAM_WIDTH; i++)
{
buf[3 * i + 0] = l_tool->levels->input[sel_channel][i];
buf[3 * i + 1] = l_tool->levels->input[sel_channel][i];
buf[3 * i + 2] = l_tool->levels->input[sel_channel][i];
}
break;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
for (i = 0; i < HISTOGRAM_WIDTH; i++)
{
buf[3 * i + 0] = l_tool->levels->input[GIMP_HISTOGRAM_RED][i];
buf[3 * i + 1] = l_tool->levels->input[GIMP_HISTOGRAM_GREEN][i];
buf[3 * i + 2] = l_tool->levels->input[GIMP_HISTOGRAM_BLUE][i];
}
break;
}
for (i = 0; i < GRADIENT_HEIGHT/2; i++)
gtk_preview_draw_row (GTK_PREVIEW (l_tool->input_area[0]),
buf, 0, i, HISTOGRAM_WIDTH);
for (i = 0; i < HISTOGRAM_WIDTH; i++)
{
buf[3 * i + 0] = i;
buf[3 * i + 1] = i;
buf[3 * i + 2] = i;
}
for (i = GRADIENT_HEIGHT/2; i < GRADIENT_HEIGHT; i++)
gtk_preview_draw_row (GTK_PREVIEW (l_tool->input_area[0]),
buf, 0, i, HISTOGRAM_WIDTH);
if (update & DRAW)
gtk_widget_queue_draw (l_tool->input_area[0]);
}
if (update & OUTPUT_LEVELS)
{
guchar buf[HISTOGRAM_WIDTH*3];
guchar r, g, b;
r = g = b = 0;
switch (sel_channel)
{
default:
g_warning ("unknown channel type, can't happen\n");
/* fall through */
case GIMP_HISTOGRAM_VALUE:
case GIMP_HISTOGRAM_ALPHA: r = g = b = 1; break;
case GIMP_HISTOGRAM_RED: r = 1; break;
case GIMP_HISTOGRAM_GREEN: g = 1; break;
case GIMP_HISTOGRAM_BLUE: b = 1; break;
}
for (i = 0; i < HISTOGRAM_WIDTH; i++)
{
buf[3 * i + 0] = i * r;
buf[3 * i + 1] = i * g;
buf[3 * i + 2] = i * b;
}
for (i = 0; i < GRADIENT_HEIGHT; i++)
gtk_preview_draw_row (GTK_PREVIEW (l_tool->output_area[0]),
buf, 0, i, HISTOGRAM_WIDTH);
if (update & DRAW)
gtk_widget_queue_draw (l_tool->output_area[0]);
}
if (update & INPUT_SLIDERS)
{
Levels *levels = l_tool->levels;
gdouble width, mid, tmp;
l_tool->slider_pos[0] = (HISTOGRAM_WIDTH *
((gdouble) levels->low_input[l_tool->channel] / 255.0));
l_tool->slider_pos[2] = (HISTOGRAM_WIDTH *
((gdouble) levels->high_input[l_tool->channel] / 255.0));
width = (gdouble) (l_tool->slider_pos[2] - l_tool->slider_pos[0]) / 2.0;
mid = l_tool->slider_pos[0] + width;
tmp = log10 (1.0 / levels->gamma[l_tool->channel]);
l_tool->slider_pos[1] = (gint) (mid + width * tmp + 0.5);
gtk_widget_queue_draw (l_tool->input_area[1]);
}
if (update & OUTPUT_SLIDERS)
{
Levels *levels = l_tool->levels;
l_tool->slider_pos[3] = (HISTOGRAM_WIDTH *
((gdouble) levels->low_output[l_tool->channel] / 255.0));
l_tool->slider_pos[4] = (HISTOGRAM_WIDTH *
((gdouble) levels->high_output[l_tool->channel] / 255.0));
gtk_widget_queue_draw (l_tool->output_area[1]);
}
}
static void
levels_channel_callback (GtkWidget *widget,
GimpLevelsTool *l_tool)
{
gimp_menu_item_update (widget, &l_tool->channel);
gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (l_tool->hist_view),
l_tool->channel);
/* FIXME: hack */
if (! l_tool->color)
l_tool->channel = (l_tool->channel > 1) ? 2 : 1;
levels_update (l_tool, ALL);
}
static void
levels_channel_reset_callback (GtkWidget *widget,
GimpLevelsTool *l_tool)
{
levels_channel_reset (l_tool->levels, l_tool->channel);
levels_update (l_tool, ALL);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
}
static gboolean
levels_set_sensitive_callback (GimpHistogramChannel channel,
GimpLevelsTool *l_tool)
{
switch (channel)
{
case GIMP_HISTOGRAM_VALUE:
return TRUE;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
return l_tool->color;
case GIMP_HISTOGRAM_ALPHA:
return gimp_drawable_has_alpha (GIMP_IMAGE_MAP_TOOL (l_tool)->drawable);
}
return FALSE;
}
static void
levels_auto_callback (GtkWidget *widget,
GimpLevelsTool *l_tool)
{
levels_auto (l_tool->levels, l_tool->hist, l_tool->color);
levels_update (l_tool, ALL);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
}
static void
levels_low_input_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool)
{
gint value;
value = (gint) (adjustment->value + 0.5);
value = CLAMP (value, 0, l_tool->levels->high_input[l_tool->channel]);
/* enforce a consistent displayed value (low_input <= high_input) */
gtk_adjustment_set_value (adjustment, value);
if (l_tool->levels->low_input[l_tool->channel] != value)
{
l_tool->levels->low_input[l_tool->channel] = value;
levels_update (l_tool, INPUT_LEVELS | INPUT_SLIDERS | DRAW);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
}
}
static void
levels_gamma_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool)
{
if (l_tool->levels->gamma[l_tool->channel] != adjustment->value)
{
l_tool->levels->gamma[l_tool->channel] = adjustment->value;
levels_update (l_tool, INPUT_LEVELS | INPUT_SLIDERS | DRAW);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
}
}
static void
levels_high_input_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool)
{
gint value;
value = (gint) (adjustment->value + 0.5);
value = CLAMP (value, l_tool->levels->low_input[l_tool->channel], 255);
/* enforce a consistent displayed value (high_input >= low_input) */
gtk_adjustment_set_value (adjustment, value);
if (l_tool->levels->high_input[l_tool->channel] != value)
{
l_tool->levels->high_input[l_tool->channel] = value;
levels_update (l_tool, INPUT_LEVELS | INPUT_SLIDERS | DRAW);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
}
}
static void
levels_low_output_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool)
{
gint value;
value = (gint) (adjustment->value + 0.5);
if (l_tool->levels->low_output[l_tool->channel] != value)
{
l_tool->levels->low_output[l_tool->channel] = value;
levels_update (l_tool, OUTPUT_LEVELS | OUTPUT_SLIDERS | DRAW);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
}
}
static void
levels_high_output_adjustment_update (GtkAdjustment *adjustment,
GimpLevelsTool *l_tool)
{
gint value;
value = (gint) (adjustment->value + 0.5);
if (l_tool->levels->high_output[l_tool->channel] != value)
{
l_tool->levels->high_output[l_tool->channel] = value;
levels_update (l_tool, OUTPUT_LEVELS | OUTPUT_SLIDERS | DRAW);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_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_OPTIONS (GIMP_TOOL (tool)->tool_info->tool_options));
}
else if (tool->active_picker == widget)
{
tool->active_picker = NULL;
gimp_color_tool_disable (GIMP_COLOR_TOOL (tool));
}
}
static gboolean
levels_input_area_event (GtkWidget *widget,
GdkEvent *event,
GimpLevelsTool *l_tool)
{
GdkEventButton *bevent;
GdkEventMotion *mevent;
gchar text[12];
gdouble width, mid, tmp;
gint x, distance;
gint i;
gboolean update = FALSE;
switch (event->type)
{
case GDK_BUTTON_PRESS:
gtk_grab_add (widget);
bevent = (GdkEventButton *) event;
distance = G_MAXINT;
for (i = 0; i < 3; i++)
if (fabs (bevent->x - l_tool->slider_pos[i]) < distance)
{
l_tool->active_slider = i;
distance = fabs (bevent->x - l_tool->slider_pos[i]);
}
x = bevent->x;
update = TRUE;
break;
case GDK_BUTTON_RELEASE:
gtk_grab_remove (widget);
switch (l_tool->active_slider)
{
case 0: /* low input */
levels_update (l_tool, LOW_INPUT | GAMMA | DRAW);
break;
case 1: /* gamma */
levels_update (l_tool, GAMMA);
break;
case 2: /* high input */
levels_update (l_tool, HIGH_INPUT | GAMMA | DRAW);
break;
}
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
break;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
gdk_window_get_pointer (widget->window, &x, NULL, NULL);
update = TRUE;
break;
default:
break;
}
if (update)
{
switch (l_tool->active_slider)
{
case 0: /* low input */
l_tool->levels->low_input[l_tool->channel] =
((gdouble) x / (gdouble) HISTOGRAM_WIDTH) * 255.0;
l_tool->levels->low_input[l_tool->channel] =
CLAMP (l_tool->levels->low_input[l_tool->channel],
0, l_tool->levels->high_input[l_tool->channel]);
break;
case 1: /* gamma */
width = (double) (l_tool->slider_pos[2] - l_tool->slider_pos[0]) / 2.0;
mid = l_tool->slider_pos[0] + width;
x = CLAMP (x, l_tool->slider_pos[0], l_tool->slider_pos[2]);
tmp = (double) (x - mid) / width;
l_tool->levels->gamma[l_tool->channel] = 1.0 / pow (10, tmp);
/* round the gamma value to the nearest 1/100th */
sprintf (text, "%2.2f", l_tool->levels->gamma[l_tool->channel]);
l_tool->levels->gamma[l_tool->channel] = atof (text);
break;
case 2: /* high input */
l_tool->levels->high_input[l_tool->channel] =
((gdouble) x / (gdouble) HISTOGRAM_WIDTH) * 255.0;
l_tool->levels->high_input[l_tool->channel] =
CLAMP (l_tool->levels->high_input[l_tool->channel],
l_tool->levels->low_input[l_tool->channel], 255);
break;
}
levels_update (l_tool, INPUT_SLIDERS | INPUT_LEVELS | DRAW);
}
return FALSE;
}
static gboolean
levels_input_area_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpLevelsTool *l_tool)
{
levels_draw_slider (widget->window,
widget->style->black_gc,
widget->style->black_gc,
l_tool->slider_pos[0]);
levels_draw_slider (widget->window,
widget->style->black_gc,
widget->style->dark_gc[GTK_STATE_NORMAL],
l_tool->slider_pos[1]);
levels_draw_slider (widget->window,
widget->style->black_gc,
widget->style->white_gc,
l_tool->slider_pos[2]);
return TRUE;
}
static gboolean
levels_output_area_event (GtkWidget *widget,
GdkEvent *event,
GimpLevelsTool *l_tool)
{
GdkEventButton *bevent;
GdkEventMotion *mevent;
gint x, distance;
gint i;
gboolean update = FALSE;
switch (event->type)
{
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
distance = G_MAXINT;
for (i = 3; i < 5; i++)
if (fabs (bevent->x - l_tool->slider_pos[i]) < distance)
{
l_tool->active_slider = i;
distance = fabs (bevent->x - l_tool->slider_pos[i]);
}
x = bevent->x;
update = TRUE;
break;
case GDK_BUTTON_RELEASE:
switch (l_tool->active_slider)
{
case 3: /* low output */
levels_update (l_tool, LOW_OUTPUT | DRAW);
break;
case 4: /* high output */
levels_update (l_tool, HIGH_OUTPUT | DRAW);
break;
}
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
break;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
gdk_window_get_pointer (widget->window, &x, NULL, NULL);
update = TRUE;
break;
default:
break;
}
if (update)
{
switch (l_tool->active_slider)
{
case 3: /* low output */
l_tool->levels->low_output[l_tool->channel] =
((gdouble) x / (gdouble) HISTOGRAM_WIDTH) * 255.0;
l_tool->levels->low_output[l_tool->channel] =
CLAMP (l_tool->levels->low_output[l_tool->channel], 0, 255);
break;
case 4: /* high output */
l_tool->levels->high_output[l_tool->channel] =
((gdouble) x / (gdouble) HISTOGRAM_WIDTH) * 255.0;
l_tool->levels->high_output[l_tool->channel] =
CLAMP (l_tool->levels->high_output[l_tool->channel], 0, 255);
break;
}
levels_update (l_tool, OUTPUT_SLIDERS | DRAW);
}
return FALSE;
}
static gboolean
levels_output_area_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpLevelsTool *l_tool)
{
levels_draw_slider (widget->window,
widget->style->black_gc,
widget->style->black_gc,
l_tool->slider_pos[3]);
levels_draw_slider (widget->window,
widget->style->black_gc,
widget->style->white_gc,
l_tool->slider_pos[4]);
return TRUE;
}
static void
levels_input_adjust_by_color (Levels *levels,
guint value,
GimpHistogramChannel channel,
guchar *color)
{
switch (value & 0xF)
{
case LOW_INPUT:
levels_adjust_by_colors (levels, channel, color, NULL, NULL);
break;
case GAMMA:
levels_adjust_by_colors (levels, channel, NULL, color, NULL);
break;
case HIGH_INPUT:
levels_adjust_by_colors (levels, channel, NULL, NULL, color);
break;
default:
break;
}
}
static void
gimp_levels_tool_color_picked (GimpColorTool *color_tool,
GimpImageType sample_type,
GimpRGB *color,
gint color_index)
{
GimpLevelsTool *l_tool;
guchar col[5];
guint value;
l_tool = GIMP_LEVELS_TOOL (color_tool);
gimp_rgba_get_uchar (color,
col + RED_PIX,
col + GREEN_PIX,
col + BLUE_PIX,
col + ALPHA_PIX);
value = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (l_tool->active_picker),
"pick_value"));
if (value & ALL_CHANNELS && GIMP_IMAGE_TYPE_IS_RGB (sample_type))
{
GimpHistogramChannel channel;
/* first reset the value channel */
switch (value & 0xF)
{
case LOW_INPUT:
l_tool->levels->low_input[GIMP_HISTOGRAM_VALUE] = 0;
break;
case GAMMA:
l_tool->levels->gamma[GIMP_HISTOGRAM_VALUE] = 1.0;
break;
case HIGH_INPUT:
l_tool->levels->high_input[GIMP_HISTOGRAM_VALUE] = 255;
break;
default:
break;
}
/* then adjust all color channels */
for (channel = GIMP_HISTOGRAM_RED;
channel <= GIMP_HISTOGRAM_BLUE;
channel++)
{
levels_input_adjust_by_color (l_tool->levels,
value, channel, col);
}
}
else
{
levels_input_adjust_by_color (l_tool->levels,
value, l_tool->channel, col);
}
levels_update (l_tool, ALL);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
}
static void
levels_load_callback (GtkWidget *widget,
GimpLevelsTool *l_tool)
{
if (! l_tool->file_dialog)
file_dialog_create (l_tool);
if (GTK_WIDGET_VISIBLE (l_tool->file_dialog))
{
gtk_window_present (GTK_WINDOW (l_tool->file_dialog));
return;
}
l_tool->is_save = FALSE;
gtk_window_set_title (GTK_WINDOW (l_tool->file_dialog), _("Load Levels"));
gtk_widget_show (l_tool->file_dialog);
}
static void
levels_save_callback (GtkWidget *widget,
GimpLevelsTool *l_tool)
{
if (! l_tool->file_dialog)
file_dialog_create (l_tool);
if (GTK_WIDGET_VISIBLE (l_tool->file_dialog))
{
gtk_window_present (GTK_WINDOW (l_tool->file_dialog));
return;
}
l_tool->is_save = TRUE;
gtk_window_set_title (GTK_WINDOW (l_tool->file_dialog), _("Save Levels"));
gtk_widget_show (l_tool->file_dialog);
}
static void
file_dialog_create (GimpLevelsTool *l_tool)
{
GtkFileSelection *file_dlg;
gchar *temp;
l_tool->file_dialog = gtk_file_selection_new ("");
file_dlg = GTK_FILE_SELECTION (l_tool->file_dialog);
gtk_window_set_role (GTK_WINDOW (file_dlg), "gimp-load-save-levels");
gtk_window_set_position (GTK_WINDOW (file_dlg), GTK_WIN_POS_MOUSE);
gtk_container_set_border_width (GTK_CONTAINER (file_dlg), 6);
gtk_container_set_border_width (GTK_CONTAINER (file_dlg->button_area), 4);
g_object_add_weak_pointer (G_OBJECT (file_dlg),
(gpointer) &l_tool->file_dialog);
gtk_window_set_transient_for (GTK_WINDOW (file_dlg),
GTK_WINDOW (GIMP_IMAGE_MAP_TOOL (l_tool)->shell));
gtk_window_set_destroy_with_parent (GTK_WINDOW (file_dlg), TRUE);
g_signal_connect (file_dlg, "response",
G_CALLBACK (file_dialog_response),
l_tool);
temp = g_build_filename (gimp_directory (), "levels", ".", NULL);
gtk_file_selection_set_filename (file_dlg, temp);
g_free (temp);
gimp_help_connect (l_tool->file_dialog, gimp_standard_help_func,
GIMP_TOOL (l_tool)->tool_info->help_id, NULL);
}
static void
file_dialog_response (GtkWidget *dialog,
gint response_id,
GimpLevelsTool *l_tool)
{
if (response_id == GTK_RESPONSE_OK)
{
const gchar *filename;
FILE *file;
filename = gtk_file_selection_get_filename (GTK_FILE_SELECTION (dialog));
file = fopen (filename, l_tool->is_save ? "wt" : "rt");
if (! file)
{
g_message (l_tool->is_save ?
_("Could not open '%s' for writing: %s") :
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename),
g_strerror (errno));
return;
}
if (l_tool->is_save)
{
levels_write_to_file (l_tool, file);
}
else if (! levels_read_from_file (l_tool, file))
{
g_message (("Error in reading file '%s'."),
gimp_filename_to_utf8 (filename));
}
fclose (file);
}
gtk_widget_destroy (dialog);
}
static gboolean
levels_read_from_file (GimpLevelsTool *l_tool,
FILE *file)
{
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], *nptr;
if (! fgets (buf, 50, file))
return FALSE;
if (strcmp (buf, "# GIMP Levels File\n") != 0)
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)
return FALSE;
if (! fgets (buf, 50, file))
return FALSE;
gamma[i] = g_ascii_strtod (buf, &nptr);
if (buf == nptr || errno == ERANGE)
return FALSE;
}
for (i = 0; i < 5; i++)
{
l_tool->levels->low_input[i] = low_input[i];
l_tool->levels->high_input[i] = high_input[i];
l_tool->levels->low_output[i] = low_output[i];
l_tool->levels->high_output[i] = high_output[i];
l_tool->levels->gamma[i] = gamma[i];
}
levels_update (l_tool, ALL);
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (l_tool));
return TRUE;
}
static void
levels_write_to_file (GimpLevelsTool *l_tool,
FILE *file)
{
gint i;
gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
fprintf (file, "# GIMP Levels File\n");
for (i = 0; i < 5; i++)
{
fprintf (file, "%d %d %d %d %s\n",
l_tool->levels->low_input[i],
l_tool->levels->high_input[i],
l_tool->levels->low_output[i],
l_tool->levels->high_output[i],
g_ascii_formatd (buf, G_ASCII_DTOSTR_BUF_SIZE, "%f",
l_tool->levels->gamma[i]));
}
}
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