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gimp/app/tools/gimplevelstool.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 <gegl.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "gegl/gimp-babl.h"
#include "operations/gimplevelsconfig.h"
#include "operations/gimpoperationlevels.h"
#include "core/gimp-gui.h"
#include "core/gimpasync.h"
#include "core/gimpcancelable.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-histogram.h"
#include "core/gimperror.h"
#include "core/gimphistogram.h"
#include "core/gimpimage.h"
#include "core/gimptoolinfo.h"
#include "core/gimptriviallycancelablewaitable.h"
#include "core/gimpwaitable.h"
#include "widgets/gimpcolorbar.h"
#include "widgets/gimphandlebar.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimphistogramview.h"
#include "widgets/gimppropwidgets.h"
#include "widgets/gimpwidgets-constructors.h"
#include "display/gimpdisplay.h"
#include "gimphistogramoptions.h"
#include "gimplevelstool.h"
#include "gimp-intl.h"
#define PICK_LOW_INPUT (1 << 0)
#define PICK_GAMMA (1 << 1)
#define PICK_HIGH_INPUT (1 << 2)
#define PICK_ALL_CHANNELS (1 << 8)
#define HISTOGRAM_WIDTH 256
#define GRADIENT_HEIGHT 12
#define CONTROL_HEIGHT 10
/* local function prototypes */
static void gimp_levels_tool_finalize (GObject *object);
static gboolean gimp_levels_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error);
static gchar * gimp_levels_tool_get_operation (GimpFilterTool *filter_tool,
gchar **description);
static void gimp_levels_tool_dialog (GimpFilterTool *filter_tool);
static void gimp_levels_tool_reset (GimpFilterTool *filter_tool);
static void gimp_levels_tool_config_notify (GimpFilterTool *filter_tool,
GimpConfig *config,
const GParamSpec *pspec);
static gboolean gimp_levels_tool_settings_import(GimpFilterTool *filter_tool,
GInputStream *input,
GError **error);
static gboolean gimp_levels_tool_settings_export(GimpFilterTool *filter_tool,
GOutputStream *output,
GError **error);
static void gimp_levels_tool_color_picked (GimpFilterTool *filter_tool,
gpointer identifier,
gdouble x,
gdouble y,
const Babl *sample_format,
const GimpRGB *color);
static void gimp_levels_tool_export_setup (GimpSettingsBox *settings_box,
GtkFileChooserDialog *dialog,
gboolean export,
GimpLevelsTool *tool);
static void levels_update_input_bar (GimpLevelsTool *tool);
static void levels_channel_callback (GtkWidget *widget,
GimpFilterTool *filter_tool);
static void levels_channel_reset_callback (GtkWidget *widget,
GimpFilterTool *filter_tool);
static gboolean levels_menu_sensitivity (gint value,
gpointer data);
static void levels_stretch_callback (GtkWidget *widget,
GimpLevelsTool *tool);
static void levels_linear_gamma_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool);
static void levels_to_curves_callback (GtkWidget *widget,
GimpFilterTool *filter_tool);
G_DEFINE_TYPE (GimpLevelsTool, gimp_levels_tool, GIMP_TYPE_FILTER_TOOL)
#define parent_class gimp_levels_tool_parent_class
void
gimp_levels_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_LEVELS_TOOL,
GIMP_TYPE_HISTOGRAM_OPTIONS,
gimp_color_options_gui,
0,
"gimp-levels-tool",
_("Levels"),
_("Adjust color levels"),
N_("_Levels..."), NULL,
NULL, GIMP_HELP_TOOL_LEVELS,
GIMP_ICON_TOOL_LEVELS,
data);
}
static void
gimp_levels_tool_class_init (GimpLevelsToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpFilterToolClass *filter_tool_class = GIMP_FILTER_TOOL_CLASS (klass);
object_class->finalize = gimp_levels_tool_finalize;
tool_class->initialize = gimp_levels_tool_initialize;
filter_tool_class->get_operation = gimp_levels_tool_get_operation;
filter_tool_class->dialog = gimp_levels_tool_dialog;
filter_tool_class->reset = gimp_levels_tool_reset;
filter_tool_class->config_notify = gimp_levels_tool_config_notify;
filter_tool_class->settings_import = gimp_levels_tool_settings_import;
filter_tool_class->settings_export = gimp_levels_tool_settings_export;
filter_tool_class->color_picked = gimp_levels_tool_color_picked;
}
static void
gimp_levels_tool_init (GimpLevelsTool *tool)
{
}
static void
gimp_levels_tool_finalize (GObject *object)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (object);
g_clear_object (&tool->histogram);
g_clear_object (&tool->histogram_async);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_levels_tool_initialize (GimpTool *tool,
GimpDisplay *display,
GError **error)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (tool);
GimpImage *image = gimp_display_get_image (display);
GimpDrawable *drawable = gimp_image_get_active_drawable (image);
GimpLevelsConfig *config;
gdouble scale_factor;
gdouble step_increment;
gdouble page_increment;
gint digits;
if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
{
return FALSE;
}
config = GIMP_LEVELS_CONFIG (filter_tool->config);
gegl_node_set (filter_tool->operation,
"trc", config->trc,
NULL);
g_clear_object (&l_tool->histogram);
g_clear_object (&l_tool->histogram_async);
l_tool->histogram = gimp_histogram_new (config->trc);
l_tool->histogram_async = gimp_drawable_calculate_histogram_async
(drawable, l_tool->histogram, FALSE);
gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (l_tool->histogram_view),
l_tool->histogram);
if (gimp_drawable_get_component_type (drawable) == GIMP_COMPONENT_TYPE_U8)
{
scale_factor = 255.0;
step_increment = 1.0;
page_increment = 8.0;
digits = 0;
}
else
{
scale_factor = 100;
step_increment = 0.01;
page_increment = 1.0;
digits = 2;
}
gimp_prop_widget_set_factor (l_tool->low_input_spinbutton,
scale_factor, step_increment, page_increment,
digits);
gimp_prop_widget_set_factor (l_tool->high_input_spinbutton,
scale_factor, step_increment, page_increment,
digits);
gimp_prop_widget_set_factor (l_tool->low_output_spinbutton,
scale_factor, step_increment, page_increment,
digits);
gimp_prop_widget_set_factor (l_tool->high_output_spinbutton,
scale_factor, step_increment, page_increment,
digits);
gtk_adjustment_configure (l_tool->gamma_linear,
scale_factor / 2.0,
0, scale_factor, 0.1, 1.0, 0);
return TRUE;
}
static gchar *
gimp_levels_tool_get_operation (GimpFilterTool *filter_tool,
gchar **description)
{
*description = g_strdup (_("Adjust Color Levels"));
return g_strdup ("gimp:levels");
}
/*******************/
/* Levels dialog */
/*******************/
static GtkWidget *
gimp_levels_tool_color_picker_new (GimpLevelsTool *tool,
guint value)
{
const gchar *icon_name;
const gchar *help;
gboolean all_channels = (value & PICK_ALL_CHANNELS) != 0;
switch (value & 0xF)
{
case PICK_LOW_INPUT:
icon_name = GIMP_ICON_COLOR_PICKER_BLACK;
if (all_channels)
help = _("Pick black point for all channels");
else
help = _("Pick black point for the selected channel");
break;
case PICK_GAMMA:
icon_name = GIMP_ICON_COLOR_PICKER_GRAY;
if (all_channels)
help = _("Pick gray point for all channels");
else
help = _("Pick gray point for the selected channel");
break;
case PICK_HIGH_INPUT:
icon_name = GIMP_ICON_COLOR_PICKER_WHITE;
if (all_channels)
help = _("Pick white point for all channels");
else
help = _("Pick white point for the selected channel");
break;
default:
return NULL;
}
return gimp_filter_tool_add_color_picker (GIMP_FILTER_TOOL (tool),
GUINT_TO_POINTER (value),
icon_name,
help,
/* pick_abyss = */ FALSE,
NULL, NULL);
}
static void
gimp_levels_tool_dialog (GimpFilterTool *filter_tool)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (filter_tool);
GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (filter_tool);
GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
GtkListStore *store;
GtkWidget *main_vbox;
GtkWidget *frame_vbox;
GtkWidget *vbox;
GtkWidget *vbox2;
GtkWidget *vbox3;
GtkWidget *hbox;
GtkWidget *hbox2;
GtkWidget *label;
GtkWidget *main_frame;
GtkWidget *frame;
GtkWidget *button;
GtkWidget *spinbutton;
GtkAdjustment *adjustment;
GtkWidget *bar;
GtkWidget *handle_bar;
gint border;
g_signal_connect (filter_tool->settings_box, "file-dialog-setup",
G_CALLBACK (gimp_levels_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_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),
levels_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 (levels_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 (levels_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);
/* Input levels frame */
frame = gimp_frame_new (_("Input Levels"));
gtk_box_pack_start (GTK_BOX (frame_vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
gtk_container_add (GTK_CONTAINER (frame), vbox);
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, 0);
gtk_widget_show (frame);
vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
gtk_widget_show (vbox2);
tool->histogram_view = gimp_histogram_view_new (FALSE);
g_object_add_weak_pointer (G_OBJECT (tool->histogram_view),
(gpointer) &tool->histogram_view);
gtk_box_pack_start (GTK_BOX (vbox2), tool->histogram_view, TRUE, TRUE, 0);
gtk_widget_show (GTK_WIDGET (tool->histogram_view));
g_object_bind_property (G_OBJECT (tool_options), "histogram-scale",
G_OBJECT (tool->histogram_view), "histogram-scale",
G_BINDING_SYNC_CREATE |
G_BINDING_BIDIRECTIONAL);
g_object_get (tool->histogram_view, "border-width", &border, NULL);
vbox3 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox3), border);
gtk_box_pack_start (GTK_BOX (vbox2), vbox3, FALSE, FALSE, 0);
gtk_widget_show (vbox3);
tool->input_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
gtk_widget_set_size_request (tool->input_bar, -1, GRADIENT_HEIGHT / 2);
gtk_box_pack_start (GTK_BOX (vbox3), tool->input_bar, FALSE, FALSE, 0);
gtk_widget_show (tool->input_bar);
bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
gtk_widget_set_size_request (bar, -1, GRADIENT_HEIGHT / 2);
gtk_box_pack_start (GTK_BOX (vbox3), bar, FALSE, FALSE, 0);
gtk_widget_show (bar);
handle_bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
gtk_widget_set_size_request (handle_bar, -1, CONTROL_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox3), handle_bar, FALSE, FALSE, 0);
gtk_widget_show (handle_bar);
gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
tool->input_bar);
gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
bar);
/* Horizontal box for input levels spinbuttons */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* low input spin */
hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_levels_tool_color_picker_new (tool, PICK_LOW_INPUT);
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
tool->low_input_spinbutton = spinbutton =
gimp_prop_spin_button_new (filter_tool->config, "low-input",
0.01, 0.1, 1);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
tool->low_input = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 0,
tool->low_input);
/* clamp input toggle */
hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
gtk_box_pack_start (GTK_BOX (hbox), hbox2, TRUE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_prop_check_button_new (filter_tool->config, "clamp-input",
_("Clamp _input"));
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
/* input gamma spin */
spinbutton = gimp_prop_spin_button_new (filter_tool->config, "gamma",
0.01, 0.1, 2);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gimp_help_set_help_data (spinbutton, _("Gamma"), NULL);
gtk_widget_show (spinbutton);
tool->gamma = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
tool->gamma_linear = gtk_adjustment_new (127, 0, 255, 0.1, 1.0, 0.0);
g_signal_connect (tool->gamma_linear, "value-changed",
G_CALLBACK (levels_linear_gamma_changed),
tool);
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 1,
tool->gamma_linear);
g_object_unref (tool->gamma_linear);
/* high input spin */
hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
gtk_widget_show (hbox2);
button = gimp_levels_tool_color_picker_new (tool, PICK_HIGH_INPUT);
gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
gtk_widget_show (button);
spinbutton = gimp_prop_spin_button_new (filter_tool->config, "high-input",
0.01, 0.1, 1);
gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
tool->high_input_spinbutton = spinbutton;
tool->high_input = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 2,
tool->high_input);
/* Output levels frame */
frame = gimp_frame_new (_("Output Levels"));
gtk_box_pack_start (GTK_BOX (frame_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
gtk_container_add (GTK_CONTAINER (frame), vbox);
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, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox2), border);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
gtk_widget_show (vbox2);
tool->output_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
gtk_widget_set_size_request (tool->output_bar, -1, GRADIENT_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox2), tool->output_bar, FALSE, FALSE, 0);
gtk_widget_show (tool->output_bar);
handle_bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
gtk_widget_set_size_request (handle_bar, -1, CONTROL_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox2), handle_bar, FALSE, FALSE, 0);
gtk_widget_show (handle_bar);
gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
tool->output_bar);
/* Horizontal box for levels spin widgets */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* low output spin */
tool->low_output_spinbutton = spinbutton =
gimp_prop_spin_button_new (filter_tool->config, "low-output",
0.01, 0.1, 1);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
adjustment = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 0, adjustment);
/* clamp output toggle */
button = gimp_prop_check_button_new (filter_tool->config, "clamp-output",
_("Clamp outpu_t"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, FALSE, 0);
gtk_widget_show (button);
/* high output spin */
tool->high_output_spinbutton = spinbutton =
gimp_prop_spin_button_new (filter_tool->config, "high-output",
0.01, 0.1, 1);
gtk_box_pack_end (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
adjustment = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 2, adjustment);
/* all channels frame */
main_frame = gimp_frame_new (_("All Channels"));
gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, FALSE, FALSE, 0);
gtk_widget_show (main_frame);
frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
gtk_widget_show (frame_vbox);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
button = gtk_button_new_with_mnemonic (_("_Auto Input Levels"));
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gimp_help_set_help_data (button,
_("Adjust levels for all channels automatically"),
NULL);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_stretch_callback),
tool);
button = gimp_levels_tool_color_picker_new (tool,
PICK_HIGH_INPUT |
PICK_ALL_CHANNELS);
gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_levels_tool_color_picker_new (tool,
PICK_GAMMA |
PICK_ALL_CHANNELS);
gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_levels_tool_color_picker_new (tool,
PICK_LOW_INPUT |
PICK_ALL_CHANNELS);
gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_icon_button_new (GIMP_ICON_TOOL_CURVES,
_("Edit these Settings as Curves"));
gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (levels_to_curves_callback),
tool);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->channel_menu),
config->channel);
}
static void
gimp_levels_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_levels_tool_config_notify (GimpFilterTool *filter_tool,
GimpConfig *config,
const GParamSpec *pspec)
{
GimpLevelsTool *levels_tool = GIMP_LEVELS_TOOL (filter_tool);
GimpLevelsConfig *levels_config = GIMP_LEVELS_CONFIG (config);
GIMP_FILTER_TOOL_CLASS (parent_class)->config_notify (filter_tool,
config, pspec);
if (! levels_tool->channel_menu ||
! levels_tool->histogram_view)
return;
if (! strcmp (pspec->name, "trc"))
{
gegl_node_set (filter_tool->operation,
"trc", levels_config->trc,
NULL);
g_clear_object (&levels_tool->histogram);
g_clear_object (&levels_tool->histogram_async);
levels_tool->histogram = gimp_histogram_new (levels_config->trc);
levels_tool->histogram_async = gimp_drawable_calculate_histogram_async
(GIMP_TOOL (filter_tool)->drawable, levels_tool->histogram, FALSE);
gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (levels_tool->histogram_view),
levels_tool->histogram);
}
else if (! strcmp (pspec->name, "channel"))
{
gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (levels_tool->histogram_view),
levels_config->channel);
gimp_color_bar_set_channel (GIMP_COLOR_BAR (levels_tool->output_bar),
levels_config->channel);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (levels_tool->channel_menu),
levels_config->channel);
}
else if (! strcmp (pspec->name, "gamma") ||
! strcmp (pspec->name, "low-input") ||
! strcmp (pspec->name, "high-input"))
{
gdouble low = gtk_adjustment_get_value (levels_tool->low_input);
gdouble high = gtk_adjustment_get_value (levels_tool->high_input);
gdouble delta, mid, tmp, value;
gtk_adjustment_set_lower (levels_tool->high_input, low);
gtk_adjustment_set_lower (levels_tool->gamma_linear, low);
gtk_adjustment_set_upper (levels_tool->low_input, high);
gtk_adjustment_set_upper (levels_tool->gamma_linear, high);
levels_update_input_bar (levels_tool);
delta = (high - low) / 2.0;
mid = low + delta;
tmp = log10 (1.0 / levels_config->gamma[levels_config->channel]);
value = mid + delta * tmp;
gtk_adjustment_set_value (levels_tool->gamma_linear, value);
}
}
static gboolean
gimp_levels_tool_settings_import (GimpFilterTool *filter_tool,
GInputStream *input,
GError **error)
{
GimpLevelsConfig *config = GIMP_LEVELS_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 Levels File\n"))
return gimp_levels_config_load_cruft (config, input, error);
return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_import (filter_tool,
input,
error);
}
static gboolean
gimp_levels_tool_settings_export (GimpFilterTool *filter_tool,
GOutputStream *output,
GError **error)
{
GimpLevelsTool *tool = GIMP_LEVELS_TOOL (filter_tool);
GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
if (tool->export_old_format)
return gimp_levels_config_save_cruft (config, output, error);
return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_export (filter_tool,
output,
error);
}
static void
levels_input_adjust_by_color (GimpLevelsConfig *config,
guint value,
GimpHistogramChannel channel,
const GimpRGB *color)
{
switch (value & 0xF)
{
case PICK_LOW_INPUT:
gimp_levels_config_adjust_by_colors (config, channel, color, NULL, NULL);
break;
case PICK_GAMMA:
gimp_levels_config_adjust_by_colors (config, channel, NULL, color, NULL);
break;
case PICK_HIGH_INPUT:
gimp_levels_config_adjust_by_colors (config, channel, NULL, NULL, color);
break;
default:
break;
}
}
static void
gimp_levels_tool_color_picked (GimpFilterTool *color_tool,
gpointer identifier,
gdouble x,
gdouble y,
const Babl *sample_format,
const GimpRGB *color)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (color_tool);
GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
GimpRGB rgb = *color;
guint value = GPOINTER_TO_UINT (identifier);
if (config->trc == GIMP_TRC_LINEAR)
babl_process (babl_fish (babl_format ("R'G'B'A double"),
babl_format ("RGBA double")),
&rgb, &rgb, 1);
if (value & PICK_ALL_CHANNELS &&
gimp_babl_format_get_base_type (sample_format) == GIMP_RGB)
{
GimpHistogramChannel channel;
/* first reset the value channel */
switch (value & 0xF)
{
case PICK_LOW_INPUT:
config->low_input[GIMP_HISTOGRAM_VALUE] = 0.0;
break;
case PICK_GAMMA:
config->gamma[GIMP_HISTOGRAM_VALUE] = 1.0;
break;
case PICK_HIGH_INPUT:
config->high_input[GIMP_HISTOGRAM_VALUE] = 1.0;
break;
default:
break;
}
/* then adjust all color channels */
for (channel = GIMP_HISTOGRAM_RED;
channel <= GIMP_HISTOGRAM_BLUE;
channel++)
{
levels_input_adjust_by_color (config, value, channel, &rgb);
}
}
else
{
levels_input_adjust_by_color (config, value, config->channel, &rgb);
}
}
static void
gimp_levels_tool_export_setup (GimpSettingsBox *settings_box,
GtkFileChooserDialog *dialog,
gboolean export,
GimpLevelsTool *tool)
{
GtkWidget *button;
if (! export)
return;
button = gtk_check_button_new_with_mnemonic (_("Use _old levels 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
levels_update_input_bar (GimpLevelsTool *tool)
{
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
switch (config->channel)
{
gdouble value;
case GIMP_HISTOGRAM_VALUE:
case GIMP_HISTOGRAM_ALPHA:
case GIMP_HISTOGRAM_RGB:
case GIMP_HISTOGRAM_LUMINANCE:
{
guchar v[256];
gint i;
for (i = 0; i < 256; i++)
{
value = gimp_operation_levels_map_input (config,
config->channel,
i / 255.0);
v[i] = CLAMP (value, 0.0, 1.0) * 255.999;
}
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
v, v, v);
}
break;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
{
guchar r[256];
guchar g[256];
guchar b[256];
gint i;
for (i = 0; i < 256; i++)
{
value = gimp_operation_levels_map_input (config,
GIMP_HISTOGRAM_RED,
i / 255.0);
r[i] = CLAMP (value, 0.0, 1.0) * 255.999;
value = gimp_operation_levels_map_input (config,
GIMP_HISTOGRAM_GREEN,
i / 255.0);
g[i] = CLAMP (value, 0.0, 1.0) * 255.999;
value = gimp_operation_levels_map_input (config,
GIMP_HISTOGRAM_BLUE,
i / 255.0);
b[i] = CLAMP (value, 0.0, 1.0) * 255.999;
}
gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
r, g, b);
}
break;
}
}
static void
levels_channel_callback (GtkWidget *widget,
GimpFilterTool *filter_tool)
{
GimpLevelsConfig *config = GIMP_LEVELS_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
levels_channel_reset_callback (GtkWidget *widget,
GimpFilterTool *filter_tool)
{
gimp_levels_config_reset_channel (GIMP_LEVELS_CONFIG (filter_tool->config));
}
static gboolean
levels_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
levels_stretch_callback (GtkWidget *widget,
GimpLevelsTool *levels_tool)
{
GimpTool *tool = GIMP_TOOL (levels_tool);
GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (levels_tool);
GimpWaitable *waitable;
waitable = gimp_trivially_cancelable_waitable_new (
GIMP_WAITABLE (levels_tool->histogram_async));
gimp_wait (tool->tool_info->gimp, waitable, _("Calculating histogram..."));
g_object_unref (waitable);
if (gimp_async_is_synced (levels_tool->histogram_async) &&
gimp_async_is_finished (levels_tool->histogram_async))
{
gimp_levels_config_stretch (GIMP_LEVELS_CONFIG (filter_tool->config),
levels_tool->histogram,
gimp_drawable_is_rgb (tool->drawable));
}
}
static void
levels_linear_gamma_changed (GtkAdjustment *adjustment,
GimpLevelsTool *tool)
{
gdouble low_input = gtk_adjustment_get_value (tool->low_input);
gdouble high_input = gtk_adjustment_get_value (tool->high_input);
gdouble delta, mid, tmp, value;
delta = (high_input - low_input) / 2.0;
if (delta >= 0.5)
{
mid = low_input + delta;
tmp = (gtk_adjustment_get_value (adjustment) - mid) / delta;
value = 1.0 / pow (10, tmp);
/* round the gamma value to the nearest 1/100th */
value = floor (value * 100 + 0.5) / 100.0;
gtk_adjustment_set_value (tool->gamma, value);
}
}
static void
levels_to_curves_callback (GtkWidget *widget,
GimpFilterTool *filter_tool)
{
GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
GimpCurvesConfig *curves;
curves = gimp_levels_config_to_curves_config (config);
gimp_filter_tool_edit_as (filter_tool,
"gimp-curves-tool",
GIMP_CONFIG (curves));
g_object_unref (curves);
}
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