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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 <https://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/gimpcurveview.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimppropwidgets.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 gchar * gimp_curves_tool_get_operation (GimpFilterTool *filter_tool,
gchar **description);
static void gimp_curves_tool_dialog (GimpFilterTool *filter_tool);
static void gimp_curves_tool_reset (GimpFilterTool *filter_tool);
static void gimp_curves_tool_config_notify (GimpFilterTool *filter_tool,
GimpConfig *config,
const GParamSpec *pspec);
static gboolean gimp_curves_tool_settings_import (GimpFilterTool *filter_tool,
GInputStream *input,
GError **error);
static gboolean gimp_curves_tool_settings_export (GimpFilterTool *filter_tool,
GOutputStream *output,
GError **error);
static void gimp_curves_tool_color_picked (GimpFilterTool *filter_tool,
gpointer identifier,
gdouble x,
gdouble y,
const Babl *sample_format,
GeglColor *color);
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_update_point (GimpCurvesTool *tool);
static void curves_curve_dirty_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_graph_selection_callback (GtkWidget *widget,
GimpCurvesTool *tool);
static void curves_point_coords_callback (GtkWidget *widget,
GimpCurvesTool *tool);
static void curves_point_type_callback (GtkWidget *widget,
GimpCurvesTool *tool);
static void curves_curve_type_callback (GtkWidget *widget,
GimpCurvesTool *tool);
static GeglColor * curves_get_channel_color (GtkWidget *widget,
GimpHistogramChannel channel);
G_DEFINE_TYPE (GimpCurvesTool, gimp_curves_tool, GIMP_TYPE_FILTER_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"),
_("Adjust color curves"),
N_("_Curves..."), NULL,
NULL, GIMP_HELP_TOOL_CURVES,
GIMP_ICON_TOOL_CURVES,
data);
}
/* private functions */
static void
gimp_curves_tool_class_init (GimpCurvesToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpFilterToolClass *filter_tool_class = GIMP_FILTER_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;
filter_tool_class->get_operation = gimp_curves_tool_get_operation;
filter_tool_class->dialog = gimp_curves_tool_dialog;
filter_tool_class->reset = gimp_curves_tool_reset;
filter_tool_class->config_notify = gimp_curves_tool_config_notify;
filter_tool_class->settings_import = gimp_curves_tool_settings_import;
filter_tool_class->settings_export = gimp_curves_tool_settings_export;
filter_tool_class->color_picked = gimp_curves_tool_color_picked;
}
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)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
GList *drawables;
GimpDrawable *drawable;
GimpCurvesConfig *config;
GimpHistogram *histogram;
GimpHistogramChannel channel;
if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
drawables = gimp_image_get_selected_drawables (image);
if (g_list_length (drawables) != 1)
{
if (g_list_length (drawables) > 1)
gimp_tool_message_literal (tool, display,
_("Cannot modify multiple drawables. Select only one."));
else
gimp_tool_message_literal (tool, display, _("No selected drawables."));
g_list_free (drawables);
return FALSE;
}
drawable = drawables->data;
g_list_free (drawables);
config = GIMP_CURVES_CONFIG (filter_tool->config);
histogram = gimp_histogram_new (config->trc);
g_object_unref (gimp_drawable_calculate_histogram_async (drawable, histogram,
FALSE));
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)
{
c_tool->scale = 255.0;
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_input), 0);
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_output), 0);
gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_input), 3);
gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_output), 3);
}
else
{
c_tool->scale = 100.0;
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_input), 2);
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_output), 2);
gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_input), 6);
gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_output), 6);
}
gimp_curve_view_set_range_x (GIMP_CURVE_VIEW (c_tool->graph),
0, c_tool->scale);
gimp_curve_view_set_range_y (GIMP_CURVE_VIEW (c_tool->graph),
0, c_tool->scale);
gtk_spin_button_set_range (GTK_SPIN_BUTTON (c_tool->point_output),
0, c_tool->scale);
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
g_signal_connect (config->curve[channel], "dirty",
G_CALLBACK (curves_curve_dirty_callback),
tool);
}
gimp_curves_tool_update_point (c_tool);
/* always pick colors */
gimp_filter_tool_enable_color_picking (filter_tool, NULL, FALSE);
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);
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
if (state & gimp_get_extend_selection_mask ())
{
GimpCurve *curve = config->curve[config->channel];
gdouble value = c_tool->picked_color[config->channel];
gint point;
point = gimp_curve_get_point_at (curve, value);
if (point < 0)
{
GimpCurvePointType type = GIMP_CURVE_POINT_SMOOTH;
point = gimp_curve_view_get_selected (
GIMP_CURVE_VIEW (c_tool->graph));
if (point >= 0)
type = gimp_curve_get_point_type (curve, point);
point = gimp_curve_add_point (
curve,
value, gimp_curve_map_value (curve, value));
gimp_curve_set_point_type (curve, point, type);
}
gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph), point);
}
else if (state & gimp_get_toggle_behavior_mask ())
{
GimpHistogramChannel channel;
GimpCurvePointType type = GIMP_CURVE_POINT_SMOOTH;
gint point;
point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (c_tool->graph));
if (point >= 0)
{
type = gimp_curve_get_point_type (config->curve[config->channel],
point);
}
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
GimpCurve *curve = config->curve[channel];
gdouble value = c_tool->picked_color[channel];
if (value != -1)
{
point = gimp_curve_get_point_at (curve, value);
if (point < 0)
{
point = gimp_curve_add_point (
curve,
value, gimp_curve_map_value (curve, value));
gimp_curve_set_point_type (curve, point, type);
}
if (channel == config->channel)
{
gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph),
point);
}
}
}
}
/* 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)
{
if (gimp_filter_tool_on_guide (GIMP_FILTER_TOOL (tool),
coords, display))
{
GIMP_TOOL_CLASS (parent_class)->oper_update (tool, coords, state, proximity,
display);
}
else
{
GimpColorPickTarget target;
gchar *status = NULL;
GdkModifierType extend_mask = gimp_get_extend_selection_mask ();
GdkModifierType toggle_mask = gimp_get_toggle_behavior_mask ();
gimp_tool_pop_status (tool, display);
if (state & extend_mask)
{
target = GIMP_COLOR_PICK_TARGET_PALETTE;
status = g_strdup (_("Click to add a control point"));
}
else if (state & toggle_mask)
{
target = GIMP_COLOR_PICK_TARGET_PALETTE;
status = g_strdup (_("Click to add control points to all channels"));
}
else
{
target = GIMP_COLOR_PICK_TARGET_NONE;
status = gimp_suggest_modifiers (_("Click to locate on curve"),
(extend_mask | toggle_mask) & ~state,
_("%s: add control point"),
_("%s: add control points to all channels"),
NULL);
}
GIMP_COLOR_TOOL (tool)->pick_target = target;
if (proximity)
gimp_tool_push_status (tool, display, "%s", status);
g_free (status);
}
}
static gchar *
gimp_curves_tool_get_operation (GimpFilterTool *filter_tool,
gchar **description)
{
*description = g_strdup (_("Adjust Color Curves"));
return g_strdup ("gimp:curves");
}
/*******************/
/* Curves dialog */
/*******************/
static void
gimp_curves_tool_dialog (GimpFilterTool *filter_tool)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (filter_tool);
GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (filter_tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
GtkListStore *store;
GtkWidget *main_vbox;
GtkWidget *frame_vbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *hbox2;
GtkWidget *label;
GtkWidget *main_frame;
GtkWidget *frame;
GtkWidget *grid;
GtkWidget *button;
GtkWidget *bar;
GtkWidget *combo;
g_signal_connect (filter_tool->settings_box, "file-dialog-setup",
G_CALLBACK (gimp_curves_tool_export_setup),
filter_tool);
main_vbox = gimp_filter_tool_dialog_get_vbox (filter_tool);
/* The combo box for selecting channels */
main_frame = gimp_frame_new (NULL);
gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, TRUE, TRUE, 0);
gtk_widget_show (main_frame);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_frame_set_label_widget (GTK_FRAME (main_frame), hbox);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("Cha_nnel:"));
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
-1);
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);
g_set_weak_pointer (&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");
gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (tool->channel_menu),
curves_menu_sensitivity, filter_tool, NULL);
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);
/* The linear/perceptual radio buttons */
hbox2 = gimp_prop_enum_icon_box_new (G_OBJECT (config), "trc",
"gimp-color-space",
-1, -1);
gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
gtk_widget_show (frame_vbox);
/* The grid for the color bars and the graph */
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 2);
gtk_grid_set_row_spacing (GTK_GRID (grid), 2);
gtk_box_pack_start (GTK_BOX (frame_vbox), grid, TRUE, TRUE, 0);
/* The left color bar */
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_grid_attach (GTK_GRID (grid), vbox, 0, 0, 1, 1);
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_widget_set_hexpand (frame, TRUE);
gtk_widget_set_vexpand (frame, TRUE);
gtk_grid_attach (GTK_GRID (grid), frame, 1, 0, 1, 1);
gtk_widget_show (frame);
g_set_weak_pointer (&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);
g_object_bind_property (G_OBJECT (tool_options), "histogram-scale",
G_OBJECT (tool->graph), "histogram-scale",
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
g_signal_connect (tool->graph, "selection-changed",
G_CALLBACK (curves_graph_selection_callback),
tool);
/* The bottom color bar */
hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_grid_attach (GTK_GRID (grid), hbox2, 1, 1, 1, 1);
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 (grid);
/* The point properties box */
tool->point_box = hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (tool->point_box);
label = gtk_label_new_with_mnemonic (_("_Input:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
tool->point_input = gimp_spin_button_new_with_range (0.0, 0.0, 1.0);
gtk_box_pack_start (GTK_BOX (hbox), tool->point_input, FALSE, FALSE, 0);
gtk_widget_show (tool->point_input);
g_signal_connect (tool->point_input, "value-changed",
G_CALLBACK (curves_point_coords_callback),
tool);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->point_input);
label = gtk_label_new_with_mnemonic (_("O_utput:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
tool->point_output = gimp_spin_button_new_with_range (0.0, 0.0, 1.0);
gtk_box_pack_start (GTK_BOX (hbox), tool->point_output, FALSE, FALSE, 0);
gtk_widget_show (tool->point_output);
g_signal_connect (tool->point_output, "value-changed",
G_CALLBACK (curves_point_coords_callback),
tool);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->point_output);
label = gtk_label_new_with_mnemonic (_("T_ype:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
hbox2 = gimp_enum_icon_box_new (GIMP_TYPE_CURVE_POINT_TYPE,
"gimp-curve-point",
GTK_ICON_SIZE_MENU,
G_CALLBACK (curves_point_type_callback),
tool, NULL,
&tool->point_type);
gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->point_type);
label = gtk_label_new_with_mnemonic (_("Curve _type:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* The curve-type combo */
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, NULL);
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 (GimpFilterTool *filter_tool)
{
GimpHistogramChannel channel;
g_object_get (filter_tool->config,
"channel", &channel,
NULL);
GIMP_FILTER_TOOL_CLASS (parent_class)->reset (filter_tool);
g_object_set (filter_tool->config,
"channel", channel,
NULL);
}
static void
gimp_curves_tool_config_notify (GimpFilterTool *filter_tool,
GimpConfig *config,
const GParamSpec *pspec)
{
GimpCurvesTool *curves_tool = GIMP_CURVES_TOOL (filter_tool);
GimpCurvesConfig *curves_config = GIMP_CURVES_CONFIG (config);
GimpCurve *curve = curves_config->curve[curves_config->channel];
GIMP_FILTER_TOOL_CLASS (parent_class)->config_notify (filter_tool,
config, pspec);
if (! curves_tool->channel_menu ||
! curves_tool->graph)
return;
if (! strcmp (pspec->name, "trc"))
{
GimpHistogram *histogram;
histogram = gimp_histogram_new (curves_config->trc);
g_object_unref (gimp_drawable_calculate_histogram_async
(GIMP_TOOL (filter_tool)->drawables->data, histogram, FALSE));
gimp_histogram_view_set_background (GIMP_HISTOGRAM_VIEW (curves_tool->graph),
histogram);
g_object_unref (histogram);
}
else if (! strcmp (pspec->name, "channel"))
{
gimp_curves_tool_update_channel (GIMP_CURVES_TOOL (filter_tool));
}
else if (! strcmp (pspec->name, "curve"))
{
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (curves_tool->curve_type),
curve->curve_type);
}
}
static gboolean
gimp_curves_tool_settings_import (GimpFilterTool *filter_tool,
GInputStream *input,
GError **error)
{
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
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 (config, input, error);
return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_import (filter_tool,
input,
error);
}
static gboolean
gimp_curves_tool_settings_export (GimpFilterTool *filter_tool,
GOutputStream *output,
GError **error)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (filter_tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
if (tool->export_old_format)
return gimp_curves_config_save_cruft (config, output, error);
return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_export (filter_tool,
output,
error);
}
static void
gimp_curves_tool_color_picked (GimpFilterTool *filter_tool,
gpointer identifier,
gdouble x,
gdouble y,
const Babl *sample_format,
GeglColor *color)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (filter_tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
GimpDrawable *drawable = GIMP_TOOL (tool)->drawables->data;
gdouble rgb[4];
/* TODO: double-check this code. What RGB values do we want exactly? Right
* now, we use sRGB space values.
*/
if (config->trc == GIMP_TRC_LINEAR)
gegl_color_get_pixel (color, babl_format ("RGBA double"), rgb);
else
gegl_color_get_pixel (color, babl_format ("R'G'B'A double"), rgb);
tool->picked_color[GIMP_HISTOGRAM_RED] = rgb[0];
tool->picked_color[GIMP_HISTOGRAM_GREEN] = rgb[1];
tool->picked_color[GIMP_HISTOGRAM_BLUE] = rgb[2];
if (gimp_drawable_has_alpha (drawable))
tool->picked_color[GIMP_HISTOGRAM_ALPHA] = rgb[3];
else
tool->picked_color[GIMP_HISTOGRAM_ALPHA] = -1;
tool->picked_color[GIMP_HISTOGRAM_VALUE] = MAX (MAX (rgb[0], rgb[1]), rgb[2]);
gimp_curve_view_set_xpos (GIMP_CURVE_VIEW (tool->graph),
tool->picked_color[config->channel]);
}
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)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_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:
case GIMP_HISTOGRAM_LUMINANCE:
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++)
{
GeglColor *curve_color;
curve_color = curves_get_channel_color (tool->graph, channel);
if (channel == config->channel)
gimp_curve_view_set_curve (GIMP_CURVE_VIEW (tool->graph), curve, curve_color);
else
gimp_curve_view_add_background (GIMP_CURVE_VIEW (tool->graph),
config->curve[channel], curve_color);
g_clear_object (&curve_color);
}
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->curve_type),
curve->curve_type);
gimp_curves_tool_update_point (tool);
}
static void
gimp_curves_tool_update_point (GimpCurvesTool *tool)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
GimpCurve *curve = config->curve[config->channel];
gint point;
point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (tool->graph));
gtk_widget_set_sensitive (tool->point_box, point >= 0);
if (point >= 0)
{
gdouble min = 0.0;
gdouble max = 1.0;
gdouble x;
gdouble y;
if (point > 0)
gimp_curve_get_point (curve, point - 1, &min, NULL);
if (point < gimp_curve_get_n_points (curve) - 1)
gimp_curve_get_point (curve, point + 1, &max, NULL);
gimp_curve_get_point (curve, point, &x, &y);
x *= tool->scale;
y *= tool->scale;
min *= tool->scale;
max *= tool->scale;
g_signal_handlers_block_by_func (tool->point_input,
curves_point_coords_callback,
tool);
g_signal_handlers_block_by_func (tool->point_output,
curves_point_coords_callback,
tool);
gtk_spin_button_set_range (GTK_SPIN_BUTTON (tool->point_input), min, max);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (tool->point_input), x);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (tool->point_output), y);
g_signal_handlers_unblock_by_func (tool->point_input,
curves_point_coords_callback,
tool);
g_signal_handlers_unblock_by_func (tool->point_output,
curves_point_coords_callback,
tool);
g_signal_handlers_block_by_func (tool->point_type,
curves_point_type_callback,
tool);
gimp_int_radio_group_set_active (
GTK_RADIO_BUTTON (tool->point_type),
gimp_curve_get_point_type (curve, point));
g_signal_handlers_unblock_by_func (tool->point_type,
curves_point_type_callback,
tool);
}
}
static void
curves_curve_dirty_callback (GimpCurve *curve,
GimpCurvesTool *tool)
{
if (tool->graph &&
gimp_curve_view_get_curve (GIMP_CURVE_VIEW (tool->graph)) == curve)
{
gimp_curves_tool_update_point (tool);
}
}
static void
curves_channel_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_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)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
gimp_curve_reset (config->curve[config->channel], FALSE);
}
static gboolean
curves_menu_sensitivity (gint value,
gpointer data)
{
GimpDrawable *drawable = GIMP_TOOL (data)->drawables->data;
GimpHistogramChannel channel = value;
if (!drawable)
return FALSE;
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;
case GIMP_HISTOGRAM_LUMINANCE:
return FALSE;
}
return FALSE;
}
static void
curves_graph_selection_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
gimp_curves_tool_update_point (tool);
}
static void
curves_point_coords_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
GimpCurve *curve = config->curve[config->channel];
gint point;
point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (tool->graph));
if (point >= 0)
{
gdouble x;
gdouble y;
x = gtk_spin_button_get_value (GTK_SPIN_BUTTON (tool->point_input));
y = gtk_spin_button_get_value (GTK_SPIN_BUTTON (tool->point_output));
x /= tool->scale;
y /= tool->scale;
gimp_curve_set_point (curve, point, x, y);
}
}
static void
curves_point_type_callback (GtkWidget *widget,
GimpCurvesTool *tool)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
GimpCurve *curve = config->curve[config->channel];
gint point;
point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (tool->graph));
if (point >= 0 && gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
{
GimpCurvePointType type;
type = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget),
"gimp-item-data"));
gimp_curve_set_point_type (curve, point, type);
}
}
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))
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_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 GeglColor *
curves_get_channel_color (GtkWidget *widget,
GimpHistogramChannel channel)
{
static const gdouble channel_colors[GIMP_HISTOGRAM_RGB][4] =
{
{ 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 }
};
GeglColor *color;
GdkRGBA rgba;
if (channel == GIMP_HISTOGRAM_VALUE)
return NULL;
color = gegl_color_new (NULL);
if (channel == GIMP_HISTOGRAM_ALPHA)
{
GtkStyleContext *style = gtk_widget_get_style_context (widget);
gdouble lum;
gdouble rgb[4];
gtk_style_context_get_color (style, gtk_style_context_get_state (style),
&rgba);
lum = GIMP_RGB_LUMINANCE (rgba.red, rgba.green, rgba.blue);
rgb[3] = 1.0;
if (lum > 0.5)
rgb[0] = rgb[1] = rgb[2] = lum - 0.3;
else
rgb[0] = rgb[1] = rgb[2] = lum + 0.3;
gegl_color_set_pixel (color, babl_format ("R'G'B'A double"), rgb);
return color;
}
gegl_color_set_pixel (color, babl_format ("R'G'B'A double"), channel_colors[channel]);
return color;
}
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