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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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <errno.h>
#include <glib/gstdio.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "operations/gimpcurvesconfig.h"
#include "operations/gimpoperationcurves.h"
#include "core/gimp.h"
#include "core/gimpcurve.h"
#include "core/gimpcurve-map.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-histogram.h"
#include "core/gimperror.h"
#include "core/gimphistogram.h"
#include "core/gimpimage.h"
#include "widgets/gimpcolorbar.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpcurveview.h"
#include "widgets/gimpwidgets-utils.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 gboolean gimp_curves_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static void gimp_curves_tool_button_release (GimpTool *tool,
const 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,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_curves_tool_color_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
gdouble x,
gdouble y,
const Babl *sample_format,
gpointer pixel,
const GimpRGB *color);
static GeglNode * gimp_curves_tool_get_operation (GimpImageMapTool *image_map_tool,
GObject **config,
gchar **undo_desc);
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_import(GimpImageMapTool *image_map_tool,
GInputStream *input,
GError **error);
static gboolean gimp_curves_tool_settings_export(GimpImageMapTool *image_map_tool,
GOutputStream *output,
GError **error);
static void gimp_curves_tool_export_setup (GimpSettingsBox *settings_box,
GtkFileChooserDialog *dialog,
gboolean export,
GimpCurvesTool *tool);
static void gimp_curves_tool_update_channel (GimpCurvesTool *tool);
static void gimp_curves_tool_config_notify (GObject *object,
GParamSpec *pspec,
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);
static const GimpRGB * curves_get_channel_color (GimpHistogramChannel channel);
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)
{
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);
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->dialog_desc = _("Adjust Color Curves");
im_tool_class->settings_name = "curves";
im_tool_class->import_dialog_title = _("Import Curves");
im_tool_class->export_dialog_title = _("Export Curves");
im_tool_class->get_operation = gimp_curves_tool_get_operation;
im_tool_class->dialog = gimp_curves_tool_dialog;
im_tool_class->reset = gimp_curves_tool_reset;
im_tool_class->settings_import = gimp_curves_tool_settings_import;
im_tool_class->settings_export = gimp_curves_tool_settings_export;
}
static void
gimp_curves_tool_init (GimpCurvesTool *tool)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (tool->picked_color); i++)
tool->picked_color[i] = -1.0;
}
static gboolean
gimp_curves_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
GimpHistogram *histogram;
if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
/* 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, drawable, NULL);
histogram = gimp_histogram_new (TRUE);
gimp_drawable_calculate_histogram (drawable, histogram);
gimp_histogram_view_set_background (GIMP_HISTOGRAM_VIEW (c_tool->graph),
histogram);
g_object_unref (histogram);
if (gimp_drawable_get_component_type (drawable) == GIMP_COMPONENT_TYPE_U8)
{
gimp_curve_view_set_range_x (GIMP_CURVE_VIEW (c_tool->graph), 0, 255);
gimp_curve_view_set_range_y (GIMP_CURVE_VIEW (c_tool->graph), 0, 255);
}
else
{
gimp_curve_view_set_range_x (GIMP_CURVE_VIEW (c_tool->graph), 0, 100);
gimp_curve_view_set_range_y (GIMP_CURVE_VIEW (c_tool->graph), 0, 100);
}
return TRUE;
}
static void
gimp_curves_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
GimpCurvesConfig *config = c_tool->config;
if (state & GDK_SHIFT_MASK)
{
GimpCurve *curve = config->curve[config->channel];
gdouble value = c_tool->picked_color[config->channel];
gint closest;
closest = gimp_curve_get_closest_point (curve, value);
gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph),
closest);
gimp_curve_set_point (curve, closest,
value, gimp_curve_map_value (curve, value));
}
else if (state & gimp_get_toggle_behavior_mask ())
{
gint i;
for (i = 0; i < 5; i++)
{
GimpCurve *curve = config->curve[i];
gdouble value = c_tool->picked_color[i];
gint closest;
closest = gimp_curve_get_closest_point (curve, value);
gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph),
closest);
gimp_curve_set_point (curve, closest,
value, gimp_curve_map_value (curve, value));
}
}
/* chain up to halt the tool */
GIMP_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
release_type, display);
}
static gboolean
gimp_curves_tool_key_press (GimpTool *tool,
GdkEventKey *kevent,
GimpDisplay *display)
{
GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
if (tool->display && c_tool->graph)
{
if (gtk_widget_event (c_tool->graph, (GdkEvent *) kevent))
return TRUE;
}
return GIMP_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
}
static void
gimp_curves_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpColorPickMode mode;
const gchar *status;
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 & gimp_get_toggle_behavior_mask ())
{
mode = GIMP_COLOR_PICK_MODE_PALETTE;
status = _("Click to add control points to all channels");
}
else
{
mode = GIMP_COLOR_PICK_MODE_NONE;
status = _("Click to locate on curve (try Shift, Ctrl)");
}
GIMP_COLOR_TOOL (tool)->pick_mode = mode;
if (proximity)
gimp_tool_push_status (tool, display, "%s", status);
}
static void
gimp_curves_tool_color_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
gdouble x,
gdouble y,
const Babl *sample_format,
gpointer pixel,
const GimpRGB *color)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (color_tool);
GimpDrawable *drawable;
drawable = GIMP_IMAGE_MAP_TOOL (tool)->drawable;
tool->picked_color[GIMP_HISTOGRAM_RED] = color->r;
tool->picked_color[GIMP_HISTOGRAM_GREEN] = color->g;
tool->picked_color[GIMP_HISTOGRAM_BLUE] = color->b;
if (gimp_drawable_has_alpha (drawable))
tool->picked_color[GIMP_HISTOGRAM_ALPHA] = color->a;
tool->picked_color[GIMP_HISTOGRAM_VALUE] = MAX (MAX (color->r, color->g),
color->b);
gimp_curve_view_set_xpos (GIMP_CURVE_VIEW (tool->graph),
tool->picked_color[tool->config->channel]);
}
static GeglNode *
gimp_curves_tool_get_operation (GimpImageMapTool *image_map_tool,
GObject **config,
gchar **undo_desc)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
tool->config = g_object_new (GIMP_TYPE_CURVES_CONFIG, NULL);
g_signal_connect_object (tool->config, "notify",
G_CALLBACK (gimp_curves_tool_config_notify),
tool, 0);
*config = G_OBJECT (tool->config);
return gegl_node_new_child (NULL,
"operation", "gimp:curves",
"config", tool->config,
NULL);
}
/*******************/
/* 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);
GimpCurvesConfig *config = tool->config;
GtkListStore *store;
GtkSizeGroup *label_group;
GtkWidget *main_vbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *hbox2;
GtkWidget *label;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *button;
GtkWidget *bar;
GtkWidget *combo;
g_signal_connect (image_map_tool->settings_box, "file-dialog-setup",
G_CALLBACK (gimp_curves_tool_export_setup),
image_map_tool);
main_vbox = gimp_image_map_tool_dialog_get_vbox (image_map_tool);
label_group = gimp_image_map_tool_dialog_get_label_group (image_map_tool);
/* The combo box for selecting channels */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (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);
gtk_size_group_add_widget (label_group, label);
store = gimp_enum_store_new_with_range (GIMP_TYPE_HISTOGRAM_CHANNEL,
GIMP_HISTOGRAM_VALUE,
GIMP_HISTOGRAM_ALPHA);
tool->channel_menu =
gimp_enum_combo_box_new_with_model (GIMP_ENUM_STORE (store));
g_object_unref (store);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->channel_menu),
config->channel);
gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (tool->channel_menu),
"gimp-channel");
gtk_box_pack_start (GTK_BOX (hbox), tool->channel_menu, FALSE, FALSE, 0);
gtk_widget_show (tool->channel_menu);
g_signal_connect (tool->channel_menu, "changed",
G_CALLBACK (curves_channel_callback),
tool);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->channel_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);
/* The histogram scale radio buttons */
hbox2 = gimp_prop_enum_icon_box_new (G_OBJECT (tool_options),
"histogram-scale", "gimp-histogram",
0, 0);
gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
/* 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 (main_vbox), table, TRUE, TRUE, 0);
/* The left color bar */
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_table_attach (GTK_TABLE (table), vbox, 0, 1, 0, 1,
GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
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, 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 ();
gimp_curve_view_set_range_x (GIMP_CURVE_VIEW (tool->graph), 0, 255);
gimp_curve_view_set_range_y (GIMP_CURVE_VIEW (tool->graph), 0, 255);
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_box_new (GTK_ORIENTATION_HORIZONTAL, 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);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_box_set_homogeneous (GTK_BOX (vbox), TRUE);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
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 (vbox), tool->xrange, TRUE, TRUE, 0);
gtk_widget_show (tool->xrange);
bar = gimp_color_bar_new (GTK_ORIENTATION_HORIZONTAL);
gtk_box_pack_start (GTK_BOX (vbox), bar, TRUE, TRUE, 0);
gtk_widget_show (bar);
gtk_widget_show (table);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_end (GTK_BOX (main_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("Curve _type:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
tool->curve_type = combo = gimp_enum_combo_box_new (GIMP_TYPE_CURVE_TYPE);
gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (combo),
"gimp-curve");
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), 0,
G_CALLBACK (curves_curve_type_callback),
tool);
gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
gtk_widget_show (combo);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
gimp_curves_tool_update_channel (tool);
}
static void
gimp_curves_tool_reset (GimpImageMapTool *image_map_tool)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
GimpCurvesConfig *default_config;
GimpHistogramChannel channel;
default_config = GIMP_CURVES_CONFIG (image_map_tool->default_config);
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
if (default_config)
{
GimpCurveType curve_type = tool->config->curve[channel]->curve_type;
g_object_freeze_notify (G_OBJECT (tool->config->curve[channel]));
gimp_config_copy (GIMP_CONFIG (default_config->curve[channel]),
GIMP_CONFIG (tool->config->curve[channel]),
0);
g_object_set (tool->config->curve[channel],
"curve-type", curve_type,
NULL);
g_object_thaw_notify (G_OBJECT (tool->config->curve[channel]));
}
else
{
gimp_curve_reset (tool->config->curve[channel], FALSE);
}
}
}
static gboolean
gimp_curves_tool_settings_import (GimpImageMapTool *image_map_tool,
GInputStream *input,
GError **error)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
gchar header[64];
gsize bytes_read;
if (! g_input_stream_read_all (input, header, sizeof (header),
&bytes_read, NULL, error) ||
bytes_read != sizeof (header))
{
g_prefix_error (error, _("Could not read header: "));
return FALSE;
}
g_seekable_seek (G_SEEKABLE (input), 0, G_SEEK_SET, NULL, NULL);
if (g_str_has_prefix (header, "# GIMP Curves File\n"))
return gimp_curves_config_load_cruft (tool->config, input, error);
return GIMP_IMAGE_MAP_TOOL_CLASS (parent_class)->settings_import (image_map_tool,
input,
error);
}
static gboolean
gimp_curves_tool_settings_export (GimpImageMapTool *image_map_tool,
GOutputStream *output,
GError **error)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (image_map_tool);
if (tool->export_old_format)
return gimp_curves_config_save_cruft (tool->config, output, error);
return GIMP_IMAGE_MAP_TOOL_CLASS (parent_class)->settings_export (image_map_tool,
output,
error);
}
static void
gimp_curves_tool_export_setup (GimpSettingsBox *settings_box,
GtkFileChooserDialog *dialog,
gboolean export,
GimpCurvesTool *tool)
{
GtkWidget *button;
if (! export)
return;
button = gtk_check_button_new_with_mnemonic (_("Use _old curves file format"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
tool->export_old_format);
gtk_file_chooser_set_extra_widget (GTK_FILE_CHOOSER (dialog), button);
gtk_widget_show (button);
g_signal_connect (button, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&tool->export_old_format);
}
static void
gimp_curves_tool_update_channel (GimpCurvesTool *tool)
{
GimpCurvesConfig *config = GIMP_CURVES_TOOL (tool)->config;
GimpCurve *curve = config->curve[config->channel];
GimpHistogramChannel channel;
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->channel_menu),
config->channel);
switch (config->channel)
{
guchar r[256];
guchar g[256];
guchar b[256];
case GIMP_HISTOGRAM_VALUE:
case GIMP_HISTOGRAM_ALPHA:
case GIMP_HISTOGRAM_RGB:
gimp_curve_get_uchar (curve, sizeof (r), r);
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange),
r, r, r);
break;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
gimp_curve_get_uchar (config->curve[GIMP_HISTOGRAM_RED],
sizeof (r), r);
gimp_curve_get_uchar (config->curve[GIMP_HISTOGRAM_GREEN],
sizeof (g), g);
gimp_curve_get_uchar (config->curve[GIMP_HISTOGRAM_BLUE],
sizeof (b), b);
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange),
r, g, b);
break;
}
gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (tool->graph),
config->channel);
gimp_curve_view_set_xpos (GIMP_CURVE_VIEW (tool->graph),
tool->picked_color[config->channel]);
gimp_color_bar_set_channel (GIMP_COLOR_BAR (tool->yrange),
config->channel);
gimp_curve_view_remove_all_backgrounds (GIMP_CURVE_VIEW (tool->graph));
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
if (channel == config->channel)
{
gimp_curve_view_set_curve (GIMP_CURVE_VIEW (tool->graph), curve,
curves_get_channel_color (channel));
}
else
{
gimp_curve_view_add_background (GIMP_CURVE_VIEW (tool->graph),
config->curve[channel],
curves_get_channel_color (channel));
}
}
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->curve_type),
curve->curve_type);
}
static void
gimp_curves_tool_config_notify (GObject *object,
GParamSpec *pspec,
GimpCurvesTool *tool)
{
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (object);
GimpCurve *curve = config->curve[config->channel];
if (! tool->xrange)
return;
if (! strcmp (pspec->name, "channel"))
{
gimp_curves_tool_update_channel (GIMP_CURVES_TOOL (tool));
}
else if (! strcmp (pspec->name, "curve"))
{
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->curve_type),
curve->curve_type);
}
}
static void
curves_channel_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
GimpCurvesConfig *config = tool->config;
gint value;
if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value) &&
config->channel != value)
{
g_object_set (config,
"channel", value,
NULL);
}
}
static void
curves_channel_reset_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
gimp_curve_reset (tool->config->curve[tool->config->channel], FALSE);
}
static gboolean
curves_menu_sensitivity (gint value,
gpointer data)
{
GimpDrawable *drawable = GIMP_DRAWABLE (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 gimp_drawable_is_rgb (drawable);
case GIMP_HISTOGRAM_ALPHA:
return gimp_drawable_has_alpha (drawable);
case GIMP_HISTOGRAM_RGB:
return FALSE;
}
return FALSE;
}
static void
curves_curve_type_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
gint value;
if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value))
{
GimpCurvesConfig *config = tool->config;
GimpCurveType curve_type = value;
if (config->curve[config->channel]->curve_type != curve_type)
gimp_curve_set_curve_type (config->curve[config->channel], curve_type);
}
}
static const GimpRGB *
curves_get_channel_color (GimpHistogramChannel channel)
{
static const GimpRGB channel_colors[GIMP_HISTOGRAM_RGB] =
{
{ 0.0, 0.0, 0.0, 1.0 },
{ 1.0, 0.0, 0.0, 1.0 },
{ 0.0, 1.0, 0.0, 1.0 },
{ 0.0, 0.0, 1.0, 1.0 },
{ 0.5, 0.5, 0.5, 1.0 }
};
if (channel == GIMP_HISTOGRAM_VALUE)
return NULL;
return &channel_colors[channel];
}
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