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gimp/app/tools/gimpcurvestool.c
Michael Natterer e09e563a70 Initial space invasion commit in GIMP 
All babl formats now have a space equivalent to a color profile,
determining the format's primaries and TRCs. This commit makes GIMP
aware of this.

libgimp:

- enum GimpPrecision: rename GAMMA values to NON_LINEAR and keep GAMMA
  as deprecated aliases, add PERCEPTUAL values so we now have LINEAR,
  NON_LINEAR and PERCPTUAL for each encoding, matching the babl
  encoding variants RGB, R'G'B' and R~G~B~.

- gimp_color_transform_can_gegl_copy() now returns TRUE if both
  profiles can return a babl space, increasing the amount of fast babl
  color conversions significantly.

- TODO: no solution yet for getting libgimp drawable proxy buffers in
  the right format with space.

plug-ins:

- follow the GimpPrecision change.

- TODO: everything else unchanged and partly broken or sub-optimal,
  like setting a new image's color profile too late.

app:

- add enum GimpTRCType { LINEAR, NON_LINEAR, PERCEPTUAL } as
  replacement for all "linear" booleans.

- change gimp-babl functions to take babl spaces and GimpTRCType
  parameters and support all sorts of new perceptual ~ formats.

- a lot of places changed in the early days of goat invasion didn't
  take advantage of gimp-babl utility functions and constructed
  formats manually. They all needed revisiting and many now use much
  simpler code calling gimp-babl API.

- change gimp_babl_format_get_color_profile() to really extract a
  newly allocated color profile from the format, and add
  gimp_babl_get_builtin_color_profile() which does the same as
  gimp_babl_format_get_color_profile() did before. Visited all callers
  to decide whether they are looking for the format's actual profile,
  or for one of the builtin profiles, simplifying code that only needs
  builtin profiles.

- drawables have a new get_space_api(), get_linear() is now get_trc().

- images now have a "layer space" and an API to get it,
  gimp_image_get_layer_format() returns formats in that space.

- an image's layer space is created from the image's color profile,
  change gimpimage-color-profile to deal with that correctly

- change many babl_format() calls to babl_format_with_space() and take
  the space from passed formats or drawables

- add function gimp_layer_fix_format_space() which replaces the
  layer's buffer with one that has the image's layer format, but
  doesn't change pixel values

- use gimp_layer_fix_format_space() to make sure layers loaded from
  XCF and created by plug-ins have the right space when added to the
  image, because it's impossible to always assign the right space upon
  layer creation

- "assign color profile" and "discard color profile" now require use
  of gimp_layer_fix_format_space() too because the profile is now
  embedded in all formats via the space.  Add
  gimp_image_assign_color_profile() which does all that and call it
  instead of a simple gimp_image_set_color_profile(), also from the
  PDB set-color-profile functions, which are essentially "assign" and
  "discard" calls.

- generally, make sure a new image's color profile is set before
  adding layers to it, gimp_image_set_color_profile() is more than
  before considered know-what-you-are-doing API.

- take special precaution in all places that call
  gimp_drawable_convert_type(), we now must pass a new_profile from
  all callers that convert layers within the same image (such as
  image_convert_type, image_convert_precision), because the layer's
  new space can't be determined from the image's layer format during
  the call.

- change all "linear" properties to "trc", in all config objects like
  for levels and curves, in the histogram, in the widgets. This results
  in some GUI that now has three choices instead of two.
  TODO: we might want to reduce that back to two later.

- keep "linear" boolean properties around as compat if needed for file
  pasring, but always convert the parsed parsed boolean to
  GimpTRCType.

- TODO: the image's "enable color management" switch is currently
  broken, will fix that in another commit.
2018-07-21 16:42:57 +02:00

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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,
const GimpRGB *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 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 gboolean curves_get_channel_color (GtkWidget *widget,
GimpHistogramChannel channel,
GimpRGB *color);
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);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
GimpCurvesConfig *config;
GimpHistogram *histogram;
if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
config = GIMP_CURVES_CONFIG (filter_tool->config);
gegl_node_set (filter_tool->operation,
"trc", config->trc,
NULL);
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)
{
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);
}
/* 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 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 ())
{
GimpHistogramChannel channel;
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
GimpCurve *curve = config->curve[channel];
gdouble value = c_tool->picked_color[channel];
gint closest;
if (value != -1)
{
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)
{
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);
tool->channel_menu =
gimp_enum_combo_box_new_with_model (GIMP_ENUM_STORE (store));
g_object_unref (store);
g_object_add_weak_pointer (G_OBJECT (tool->channel_menu),
(gpointer) &tool->channel_menu);
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);
gtk_widget_show (hbox2);
/* 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);
gtk_widget_show (hbox2);
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);
tool->graph = gimp_curve_view_new ();
g_object_add_weak_pointer (G_OBJECT (tool->graph),
(gpointer) &tool->graph);
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);
/* 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);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_end (GTK_BOX (frame_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 (GimpFilterTool *filter_tool)
{
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
GimpCurvesConfig *default_config;
GimpHistogramChannel channel;
default_config = GIMP_CURVES_CONFIG (filter_tool->default_config);
g_object_freeze_notify (G_OBJECT (config));
if (default_config)
g_object_set (config, "trc", default_config->trc, NULL);
else
gimp_config_reset_property (G_OBJECT (config), "trc");
for (channel = GIMP_HISTOGRAM_VALUE;
channel <= GIMP_HISTOGRAM_ALPHA;
channel++)
{
if (default_config)
{
GimpCurveType curve_type = config->curve[channel]->curve_type;
g_object_freeze_notify (G_OBJECT (config->curve[channel]));
gimp_config_copy (GIMP_CONFIG (default_config->curve[channel]),
GIMP_CONFIG (config->curve[channel]),
0);
g_object_set (config->curve[channel],
"curve-type", curve_type,
NULL);
g_object_thaw_notify (G_OBJECT (config->curve[channel]));
}
else
{
gimp_curve_reset (config->curve[channel], FALSE);
}
}
g_object_thaw_notify (G_OBJECT (config));
}
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;
gegl_node_set (filter_tool->operation,
"trc", curves_config->trc,
NULL);
histogram = gimp_histogram_new (curves_config->trc);
g_object_unref (gimp_drawable_calculate_histogram_async
(GIMP_TOOL (filter_tool)->drawable, 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,
const GimpRGB *color)
{
GimpCurvesTool *tool = GIMP_CURVES_TOOL (filter_tool);
GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
GimpDrawable *drawable = GIMP_TOOL (tool)->drawable;
GimpRGB rgb = *color;
if (config->trc == GIMP_TRC_LINEAR)
babl_process (babl_fish (babl_format ("R'G'B'A double"),
babl_format ("RGBA double")),
&rgb, &rgb, 1);
tool->picked_color[GIMP_HISTOGRAM_RED] = rgb.r;
tool->picked_color[GIMP_HISTOGRAM_GREEN] = rgb.g;
tool->picked_color[GIMP_HISTOGRAM_BLUE] = rgb.b;
if (gimp_drawable_has_alpha (drawable))
tool->picked_color[GIMP_HISTOGRAM_ALPHA] = rgb.a;
else
tool->picked_color[GIMP_HISTOGRAM_ALPHA] = -1;
tool->picked_color[GIMP_HISTOGRAM_VALUE] = MAX (MAX (rgb.r, rgb.g), rgb.b);
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++)
{
GimpRGB curve_color;
gboolean has_color;
has_color = curves_get_channel_color (tool->graph, channel, &curve_color);
if (channel == config->channel)
{
gimp_curve_view_set_curve (GIMP_CURVE_VIEW (tool->graph), curve,
has_color ? &curve_color : NULL);
}
else
{
gimp_curve_view_add_background (GIMP_CURVE_VIEW (tool->graph),
config->curve[channel],
has_color ? &curve_color : NULL);
}
}
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)
{
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)->drawable;
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_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 gboolean
curves_get_channel_color (GtkWidget *widget,
GimpHistogramChannel channel,
GimpRGB *color)
{
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 }
};
GdkRGBA rgba;
if (channel == GIMP_HISTOGRAM_VALUE)
return FALSE;
if (channel == GIMP_HISTOGRAM_ALPHA)
{
GtkStyleContext *style = gtk_widget_get_style_context (widget);
gdouble lum;
gtk_style_context_get_color (style, gtk_style_context_get_state (style),
&rgba);
lum = GIMP_RGB_LUMINANCE (rgba.red, rgba.green, rgba.blue);
if (lum > 0.5)
{
gimp_rgba_set (color, lum - 0.3, lum - 0.3, lum - 0.3, 1.0);
}
else
{
gimp_rgba_set (color, lum + 0.3, lum + 0.3, lum + 0.3, 1.0);
}
return TRUE;
}
*color = channel_colors[channel];
return TRUE;
}
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