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gimp/app/tools/gimpcurvestool.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 <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/curves.h"
#include "base/gimphistogram.h"
#include "base/gimplut.h"
#include "core/gimp.h"
#include "core/gimpcurve.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-histogram.h"
#include "core/gimpimage.h"
#include "core/gimpimagemap.h"
#include "widgets/gimpcolorbar.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpcurveview.h"
#include "display/gimpdisplay.h"
#include "gimpcurvestool.h"
#include "gimphistogramoptions.h"
#include "gimp-intl.h"
#define GRAPH_SIZE 256
#define BAR_SIZE 12
#define RADIUS 4
/* local function prototypes */
static void gimp_curves_tool_finalize (GObject *object);
static gboolean gimp_curves_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static void gimp_curves_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static gboolean gimp_curves_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display);
static void gimp_curves_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_curves_tool_color_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
GimpImageType sample_type,
GimpRGB *color,
gint color_index);
static void gimp_curves_tool_map (GimpImageMapTool *image_map_tool);
static void gimp_curves_tool_dialog (GimpImageMapTool *image_map_tool);
static void gimp_curves_tool_reset (GimpImageMapTool *image_map_tool);
static gboolean gimp_curves_tool_settings_load (GimpImageMapTool *image_map_tool,
gpointer fp,
GError **error);
static gboolean gimp_curves_tool_settings_save (GimpImageMapTool *image_map_tool,
gpointer fp);
static void curves_curve_callback (GimpCurve *curve,
GimpCurvesTool *tool);
static void curves_channel_callback (GtkWidget *widget,
GimpCurvesTool *tool);
static void curves_channel_reset_callback (GtkWidget *widget,
GimpCurvesTool *tool);
static gboolean curves_menu_sensitivity (gint value,
gpointer data);
static void curves_curve_type_callback (GtkWidget *widget,
GimpCurvesTool *tool);
G_DEFINE_TYPE (GimpCurvesTool, gimp_curves_tool, GIMP_TYPE_IMAGE_MAP_TOOL)
#define parent_class gimp_curves_tool_parent_class
/* public functions */
void
gimp_curves_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_CURVES_TOOL,
GIMP_TYPE_HISTOGRAM_OPTIONS,
gimp_color_options_gui,
0,
"gimp-curves-tool",
_("Curves"),
_("Curves Tool: Adjust color curves"),
N_("_Curves..."), NULL,
NULL, GIMP_HELP_TOOL_CURVES,
GIMP_STOCK_TOOL_CURVES,
data);
}
/* private functions */
static void
gimp_curves_tool_class_init (GimpCurvesToolClass *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_curves_tool_finalize;
tool_class->initialize = gimp_curves_tool_initialize;
tool_class->button_release = gimp_curves_tool_button_release;
tool_class->key_press = gimp_curves_tool_key_press;
tool_class->oper_update = gimp_curves_tool_oper_update;
color_tool_class->picked = gimp_curves_tool_color_picked;
im_tool_class->shell_desc = _("Adjust Color Curves");
im_tool_class->settings_name = "curves";
im_tool_class->load_dialog_title = _("Load Curves");
im_tool_class->load_button_tip = _("Load curves settings from file");
im_tool_class->save_dialog_title = _("Save Curves");
im_tool_class->save_button_tip = _("Save curves settings to file");
im_tool_class->map = gimp_curves_tool_map;
im_tool_class->dialog = gimp_curves_tool_dialog;
im_tool_class->reset = gimp_curves_tool_reset;
im_tool_class->settings_load = gimp_curves_tool_settings_load;
im_tool_class->settings_save = gimp_curves_tool_settings_save;
}
static void
gimp_curves_tool_init (GimpCurvesTool *tool)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (tool->curve); i++)
{
tool->curve[i] = GIMP_CURVE (gimp_curve_new ("curves tool"));
g_signal_connect_object (tool->curve[i], "dirty",
G_CALLBACK (curves_curve_callback),
tool, 0);
}
tool->lut = gimp_lut_new ();
tool->channel = GIMP_HISTOGRAM_VALUE;
for (i = 0; i < G_N_ELEMENTS (tool->col_value); i++)
tool->col_value[i] = -1;
}
static void
gimp_curves_tool_finalize (GObject *object)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (object);
gint i;
for (i = 0; i < G_N_ELEMENTS (tool->curve); i++)
g_object_unref (tool->curve[i]);
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_curves_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
GimpDrawable *drawable = gimp_image_get_active_drawable (display->image);
gint i;
if (! drawable)
return FALSE;
if (gimp_drawable_is_indexed (drawable))
{
g_set_error (error, 0, 0,
_("Curves does not operate on indexed layers."));
return FALSE;
}
for (i = 0; i < G_N_ELEMENTS (c_tool->curve); i++)
gimp_curve_reset (c_tool->curve[i], TRUE);
if (! c_tool->hist)
c_tool->hist = gimp_histogram_new ();
c_tool->channel = GIMP_HISTOGRAM_VALUE;
c_tool->color = gimp_drawable_is_rgb (drawable);
c_tool->alpha = gimp_drawable_has_alpha (drawable);
GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error);
/* always pick colors */
gimp_color_tool_enable (GIMP_COLOR_TOOL (tool),
GIMP_COLOR_TOOL_GET_OPTIONS (tool));
gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (c_tool->channel_menu),
curves_menu_sensitivity, c_tool, NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (c_tool->channel_menu),
c_tool->channel);
/* FIXME: hack */
if (! c_tool->color)
c_tool->channel = (c_tool->channel == GIMP_HISTOGRAM_ALPHA) ? 1 : 0;
gimp_drawable_calculate_histogram (drawable, c_tool->hist);
gimp_histogram_view_set_background (GIMP_HISTOGRAM_VIEW (c_tool->graph),
c_tool->hist);
gimp_curve_view_set_curve (GIMP_CURVE_VIEW (c_tool->graph),
c_tool->curve[c_tool->channel]);
return TRUE;
}
static void
gimp_curves_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
if (state & GDK_SHIFT_MASK)
{
GimpCurve *curve = c_tool->curve[c_tool->channel];
gint closest;
closest =
gimp_curve_get_closest_point (curve,
c_tool->col_value[c_tool->channel]);
gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph),
closest);
gimp_curve_set_point (curve,
closest,
c_tool->col_value[c_tool->channel],
curve->curve[c_tool->col_value[c_tool->channel]]);
}
else if (state & GDK_CONTROL_MASK)
{
gint i;
for (i = 0; i < 5; i++)
{
GimpCurve *curve = c_tool->curve[i];
gint closest;
closest =
gimp_curve_get_closest_point (curve,
c_tool->col_value[i]);
gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph),
closest);
gimp_curve_set_point (curve,
closest,
c_tool->col_value[i],
curve->curve[c_tool->col_value[i]]);
}
}
/* chain up to halt the tool */
GIMP_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
release_type, display);
}
gboolean
gimp_curves_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
return gtk_widget_event (c_tool->graph, (GdkEvent *) kevent);
}
static void
gimp_curves_tool_oper_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpColorPickMode mode = GIMP_COLOR_PICK_MODE_NONE;
const gchar *status = NULL;
GIMP_TOOL_CLASS (parent_class)->oper_update (tool, coords, state, proximity,
display);
gimp_tool_pop_status (tool, display);
if (state & GDK_SHIFT_MASK)
{
mode = GIMP_COLOR_PICK_MODE_PALETTE;
status = _("Click to add a control point");
}
else if (state & GDK_CONTROL_MASK)
{
mode = GIMP_COLOR_PICK_MODE_PALETTE;
status = _("Click to add control points to all channels");
}
GIMP_COLOR_TOOL (tool)->pick_mode = mode;
if (status && proximity)
gimp_tool_push_status (tool, display, status);
}
static void
gimp_curves_tool_color_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
GimpImageType sample_type,
GimpRGB *color,
gint color_index)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (color_tool);
GimpDrawable *drawable;
guchar r, g, b, a;
GimpHistogramChannel channel;
drawable = GIMP_IMAGE_MAP_TOOL (tool)->drawable;
gimp_rgba_get_uchar (color, &r, &g, &b, &a);
tool->col_value[GIMP_HISTOGRAM_RED] = r;
tool->col_value[GIMP_HISTOGRAM_GREEN] = g;
tool->col_value[GIMP_HISTOGRAM_BLUE] = b;
if (gimp_drawable_has_alpha (drawable))
tool->col_value[GIMP_HISTOGRAM_ALPHA] = a;
if (gimp_drawable_is_indexed (drawable))
tool->col_value[GIMP_HISTOGRAM_ALPHA] = color_index;
tool->col_value[GIMP_HISTOGRAM_VALUE] = MAX (MAX (r, g), b);
if (tool->color)
channel = tool->channel;
else
channel = (tool->channel == 1) ? GIMP_HISTOGRAM_ALPHA : GIMP_HISTOGRAM_VALUE;
gimp_curve_view_set_xpos (GIMP_CURVE_VIEW (tool->graph),
tool->col_value[channel]);
}
static void
gimp_curves_tool_map (GimpImageMapTool *image_map_tool)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
Curves curves;
gint i;
for (i = 0; i < G_N_ELEMENTS (tool->curve); i++)
gimp_curve_get_uchar (tool->curve[i], curves.curve[i]);
gimp_lut_setup (tool->lut,
(GimpLutFunc) curves_lut_func,
&curves,
gimp_drawable_bytes (image_map_tool->drawable));
gimp_image_map_apply (image_map_tool->image_map,
(GimpImageMapApplyFunc) gimp_lut_process,
tool->lut);
}
/*******************/
/* Curves dialog */
/*******************/
static void
gimp_curves_tool_dialog (GimpImageMapTool *image_map_tool)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (image_map_tool);
GtkListStore *store;
GtkWidget *vbox;
GtkWidget *vbox2;
GtkWidget *hbox;
GtkWidget *hbox2;
GtkWidget *label;
GtkWidget *bbox;
GtkWidget *frame;
GtkWidget *menu;
GtkWidget *table;
GtkWidget *button;
GtkWidget *bar;
gint padding;
vbox = image_map_tool->main_vbox;
/* The option menu for selecting channels */
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_start (GTK_BOX (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 (curves_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 (curves_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);
/* The table for the color bars and the graph */
table = gtk_table_new (2, 2, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 2);
gtk_table_set_row_spacings (GTK_TABLE (table), 2);
gtk_box_pack_start (GTK_BOX (vbox), table, TRUE, TRUE, 0);
/* The left color bar */
vbox2 = gtk_vbox_new (FALSE, 0);
gtk_table_attach (GTK_TABLE (table), vbox2, 0, 1, 0, 1,
GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 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, RADIUS);
gtk_widget_show (frame);
tool->yrange = gimp_color_bar_new (GTK_ORIENTATION_VERTICAL);
gtk_widget_set_size_request (tool->yrange, BAR_SIZE, -1);
gtk_container_add (GTK_CONTAINER (frame), tool->yrange);
gtk_widget_show (tool->yrange);
/* The curves graph */
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, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (frame);
tool->graph = gimp_curve_view_new ();
gtk_widget_set_size_request (tool->graph,
GRAPH_SIZE + RADIUS * 2,
GRAPH_SIZE + RADIUS * 2);
g_object_set (tool->graph,
"border-width", RADIUS,
"subdivisions", 1,
NULL);
gtk_container_add (GTK_CONTAINER (frame), tool->graph);
gtk_widget_show (tool->graph);
gimp_histogram_options_connect_view (GIMP_HISTOGRAM_OPTIONS (tool_options),
GIMP_HISTOGRAM_VIEW (tool->graph));
/* The bottom color bar */
hbox2 = gtk_hbox_new (FALSE, 0);
gtk_table_attach (GTK_TABLE (table), hbox2, 1, 2, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (hbox2);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox2), frame, TRUE, TRUE, RADIUS);
gtk_widget_show (frame);
vbox2 = gtk_vbox_new (TRUE, 0);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
gtk_widget_show (vbox2);
tool->xrange = gimp_color_bar_new (GTK_ORIENTATION_HORIZONTAL);
gtk_widget_set_size_request (tool->xrange, -1, BAR_SIZE / 2);
gtk_box_pack_start (GTK_BOX (vbox2), tool->xrange, TRUE, TRUE, 0);
gtk_widget_show (tool->xrange);
bar = gimp_color_bar_new (GTK_ORIENTATION_HORIZONTAL);
gtk_box_pack_start (GTK_BOX (vbox2), bar, TRUE, TRUE, 0);
gtk_widget_show (bar);
gtk_widget_show (table);
hbox = gtk_hbox_new (FALSE, 6);
gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* Horizontal button box for load / save */
frame = gimp_frame_new (_("All Channels"));
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
bbox = gtk_hbutton_box_new ();
gtk_box_set_spacing (GTK_BOX (bbox), 4);
gtk_container_add (GTK_CONTAINER (frame), bbox);
gtk_widget_show (bbox);
gtk_box_pack_start (GTK_BOX (bbox), image_map_tool->load_button,
FALSE, FALSE, 0);
gtk_widget_show (image_map_tool->load_button);
gtk_box_pack_start (GTK_BOX (bbox), image_map_tool->save_button,
FALSE, FALSE, 0);
gtk_widget_show (image_map_tool->save_button);
/* The radio box for selecting the curve type */
frame = gimp_frame_new (_("Curve Type"));
gtk_box_pack_end (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gimp_enum_stock_box_new (GIMP_TYPE_CURVE_TYPE,
"gimp-curve", GTK_ICON_SIZE_MENU,
G_CALLBACK (curves_curve_type_callback),
tool,
&tool->curve_type);
gtk_widget_style_get (bbox, "child-internal-pad-x", &padding, NULL);
gimp_enum_stock_box_set_child_padding (hbox, padding, -1);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 2);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
}
static void
gimp_curves_tool_reset (GimpImageMapTool *image_map_tool)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
GimpHistogramChannel channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
gimp_curve_reset (tool->curve[channel], FALSE);
}
}
static gboolean
gimp_curves_tool_settings_load (GimpImageMapTool *image_map_tool,
gpointer fp,
GError **error)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
FILE *file = fp;
gint i, j;
gint fields;
gchar buf[50];
gint index[5][GIMP_CURVE_NUM_POINTS];
gint value[5][GIMP_CURVE_NUM_POINTS];
if (! fgets (buf, sizeof (buf), file) ||
strcmp (buf, "# GIMP Curves File\n") != 0)
{
g_set_error (error, GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("not a GIMP Curves file"));
return FALSE;
}
for (i = 0; i < 5; i++)
{
for (j = 0; j < GIMP_CURVE_NUM_POINTS; j++)
{
fields = fscanf (file, "%d %d ", &index[i][j], &value[i][j]);
if (fields != 2)
{
/* FIXME: should have a helpful error message here */
g_printerr ("fields != 2");
g_set_error (error, GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("parse error"));
return FALSE;
}
}
}
for (i = 0; i < 5; i++)
{
GimpCurve *curve = tool->curve[i];
gimp_data_freeze (GIMP_DATA (curve));
gimp_curve_set_curve_type (curve, GIMP_CURVE_SMOOTH);
for (j = 0; j < GIMP_CURVE_NUM_POINTS; j++)
gimp_curve_set_point (curve, j, index[i][j], value[i][j]);
gimp_data_thaw (GIMP_DATA (curve));
}
gimp_int_radio_group_set_active (GTK_RADIO_BUTTON (tool->curve_type),
GIMP_CURVE_SMOOTH);
return TRUE;
}
static gboolean
gimp_curves_tool_settings_save (GimpImageMapTool *image_map_tool,
gpointer fp)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
FILE *file = fp;
gint i, j;
gint32 index;
fprintf (file, "# GIMP Curves File\n");
for (i = 0; i < 5; i++)
{
GimpCurve *curve = tool->curve[i];
if (curve->curve_type == GIMP_CURVE_FREE)
{
/* pick representative points from the curve and make them
* control points
*/
for (j = 0; j <= 8; j++)
{
index = CLAMP0255 (j * 32);
curve->points[j * 2][0] = index;
curve->points[j * 2][1] = curve->curve[index];
}
}
for (j = 0; j < GIMP_CURVE_NUM_POINTS; j++)
fprintf (file, "%d %d ",
curve->points[j][0],
curve->points[j][1]);
fprintf (file, "\n");
}
return TRUE;
}
static void
curves_curve_callback (GimpCurve *curve,
GimpCurvesTool *tool)
{
if (curve != tool->curve[tool->channel])
return;
if (tool->xrange)
{
GimpHistogramChannel channel;
if (tool->color)
channel = tool->channel;
else
channel = ((tool->channel == 1) ?
GIMP_HISTOGRAM_ALPHA : GIMP_HISTOGRAM_VALUE);
switch (channel)
{
case GIMP_HISTOGRAM_VALUE:
case GIMP_HISTOGRAM_ALPHA:
case GIMP_HISTOGRAM_RGB:
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange),
tool->curve[tool->channel]->curve,
tool->curve[tool->channel]->curve,
tool->curve[tool->channel]->curve);
break;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange),
tool->curve[GIMP_HISTOGRAM_RED]->curve,
tool->curve[GIMP_HISTOGRAM_GREEN]->curve,
tool->curve[GIMP_HISTOGRAM_BLUE]->curve);
break;
}
}
if (GIMP_IMAGE_MAP_TOOL (tool)->drawable)
gimp_image_map_tool_preview (GIMP_IMAGE_MAP_TOOL (tool));
}
static void
curves_channel_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
gint value;
if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value))
{
tool->channel = value;
gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (tool->graph),
tool->channel);
gimp_curve_view_set_xpos (GIMP_CURVE_VIEW (tool->graph),
tool->col_value[tool->channel]);
gimp_color_bar_set_channel (GIMP_COLOR_BAR (tool->yrange), tool->channel);
/* FIXME: hack */
if (! tool->color)
tool->channel = (tool->channel == GIMP_HISTOGRAM_ALPHA) ? 1 : 0;
gimp_curve_view_set_curve (GIMP_CURVE_VIEW (tool->graph),
tool->curve[tool->channel]);
gimp_int_radio_group_set_active (GTK_RADIO_BUTTON (tool->curve_type),
tool->curve[tool->channel]->curve_type);
curves_curve_callback (tool->curve[tool->channel], tool);
}
}
static void
curves_channel_reset_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
gimp_curve_reset (tool->curve[tool->channel], FALSE);
}
static gboolean
curves_menu_sensitivity (gint value,
gpointer data)
{
GimpCurvesTool *tool = GIMP_CURVES_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
curves_curve_type_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
GimpCurveType curve_type;
gimp_radio_button_update (widget, &curve_type);
if (tool->curve[tool->channel]->curve_type != curve_type)
{
gimp_curve_set_curve_type (tool->curve[tool->channel], curve_type);
}
}
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