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d6c578c56784ca14872f9d42ef30a13b51f072bc
gimp/app/tools/gimpcurvestool.c
Michael Natterer 014cd08c5c Bug 750953 - The Curves dialog should present per channel lines... 
...when opened by the "Edit these settings as Curves" button on the
Levels dialog

The code to configure the entire GUI correctly was not even called
when initially creating the curves dialog (the color bars probably
looked right just because of default values of their own).

Factor out gimp_curves_tool_update_channel() which properly updates
the GUI. Call it after the dialog has been created, and when the
active channel changes.
2015-06-15 00:11:13 +02:00

828 lines
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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,
const GimpRGB *color,
gint color_index);
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,
const GimpRGB *color,
gint color_index)
{
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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