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gimp/app/widgets/gimphistogrameditor.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 "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "core/gimp.h"
#include "core/gimpasync.h"
#include "core/gimpdrawable.h"
#include "core/gimpdrawable-histogram.h"
#include "core/gimphistogram.h"
#include "core/gimpimage.h"
#include "gimpdocked.h"
#include "gimphelp-ids.h"
#include "gimphistogrambox.h"
#include "gimphistogrameditor.h"
#include "gimphistogramview.h"
#include "gimppropwidgets.h"
#include "gimpsessioninfo-aux.h"
#include "gimpwidgets-utils.h"
#include "gimp-intl.h"
enum
{
PROP_0,
PROP_TRC
};
static void gimp_histogram_editor_docked_iface_init (GimpDockedInterface *iface);
static void gimp_histogram_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_histogram_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_histogram_editor_set_aux_info (GimpDocked *docked,
GList *aux_info);
static GList * gimp_histogram_editor_get_aux_info (GimpDocked *docked);
static void gimp_histogram_editor_set_image (GimpImageEditor *editor,
GimpImage *image);
static void gimp_histogram_editor_layer_changed (GimpImage *image,
GimpHistogramEditor *editor);
static void gimp_histogram_editor_frozen_update (GimpHistogramEditor *editor,
const GParamSpec *pspec);
static void gimp_histogram_editor_buffer_update (GimpHistogramEditor *editor,
const GParamSpec *pspec);
static void gimp_histogram_editor_update (GimpHistogramEditor *editor);
static gboolean gimp_histogram_editor_idle_update (GimpHistogramEditor *editor);
static gboolean gimp_histogram_menu_sensitivity (gint value,
gpointer data);
static void gimp_histogram_editor_menu_update (GimpHistogramEditor *editor);
static void gimp_histogram_editor_name_update (GimpHistogramEditor *editor);
static void gimp_histogram_editor_info_update (GimpHistogramEditor *editor);
static gboolean gimp_histogram_editor_view_draw (GimpHistogramEditor *editor,
cairo_t *cr);
G_DEFINE_TYPE_WITH_CODE (GimpHistogramEditor, gimp_histogram_editor,
GIMP_TYPE_IMAGE_EDITOR,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_DOCKED,
gimp_histogram_editor_docked_iface_init))
#define parent_class gimp_histogram_editor_parent_class
static GimpDockedInterface *parent_docked_iface = NULL;
static void
gimp_histogram_editor_class_init (GimpHistogramEditorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpImageEditorClass *image_editor_class = GIMP_IMAGE_EDITOR_CLASS (klass);
object_class->set_property = gimp_histogram_editor_set_property;
object_class->get_property = gimp_histogram_editor_get_property;
image_editor_class->set_image = gimp_histogram_editor_set_image;
g_object_class_install_property (object_class, PROP_TRC,
g_param_spec_enum ("trc",
_("Linear/Preceptual"),
NULL,
GIMP_TYPE_TRC_TYPE,
GIMP_TRC_LINEAR,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
gimp_histogram_editor_init (GimpHistogramEditor *editor)
{
GimpHistogramView *view;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *menu;
GtkWidget *grid;
gint i;
const gchar *gimp_histogram_editor_labels[] =
{
N_("Mean:"),
N_("Std dev:"),
N_("Median:"),
N_("Pixels:"),
N_("Count:"),
N_("Percentile:")
};
editor->box = gimp_histogram_box_new ();
gimp_editor_set_show_name (GIMP_EDITOR (editor), TRUE);
view = GIMP_HISTOGRAM_BOX (editor->box)->view;
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_pack_start (GTK_BOX (editor), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
editor->menu = menu = gimp_prop_enum_combo_box_new (G_OBJECT (view),
"histogram-channel",
0, 0);
gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (menu),
"gimp-channel");
gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (editor->menu),
gimp_histogram_menu_sensitivity,
editor, NULL);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (editor->menu),
view->channel);
gtk_box_pack_start (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
gtk_widget_show (menu);
gimp_help_set_help_data (editor->menu,
_("Histogram channel"), NULL);
menu = gimp_prop_enum_icon_box_new (G_OBJECT (view),
"histogram-scale", "gimp-histogram",
0, 0);
gtk_box_pack_end (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
gtk_widget_show (menu);
menu = gimp_prop_enum_icon_box_new (G_OBJECT (editor), "trc",
"gimp-color-space",
-1, -1);
gtk_box_pack_end (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
gtk_widget_show (menu);
gtk_box_pack_start (GTK_BOX (editor), editor->box, TRUE, TRUE, 0);
gtk_widget_show (GTK_WIDGET (editor->box));
g_signal_connect_swapped (view, "range-changed",
G_CALLBACK (gimp_histogram_editor_info_update),
editor);
g_signal_connect_swapped (view, "notify::histogram-channel",
G_CALLBACK (gimp_histogram_editor_info_update),
editor);
g_signal_connect_swapped (view, "draw",
G_CALLBACK (gimp_histogram_editor_view_draw),
editor);
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 2);
gtk_box_pack_start (GTK_BOX (editor), grid, FALSE, FALSE, 0);
gtk_widget_show (grid);
for (i = 0; i < 6; i++)
{
gint x = (i / 3) * 2;
gint y = (i % 3);
label = gtk_label_new (gettext (gimp_histogram_editor_labels[i]));
gimp_label_set_attributes (GTK_LABEL (label),
PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
PANGO_ATTR_SCALE, PANGO_SCALE_SMALL,
-1);
gtk_label_set_xalign (GTK_LABEL (label), 1.0);
gtk_widget_set_hexpand (label, TRUE);
gtk_grid_attach (GTK_GRID (grid), label, x, y, 1, 1);
gtk_widget_show (label);
editor->labels[i] =
label = g_object_new (GTK_TYPE_LABEL,
"xalign", 0.0,
"yalign", 0.5,
"width-chars", i > 2 ? 9 : 5,
NULL);
gimp_label_set_attributes (GTK_LABEL (editor->labels[i]),
PANGO_ATTR_SCALE, PANGO_SCALE_SMALL,
-1);
gtk_grid_attach (GTK_GRID (grid), label, x + 1, y, 1, 1);
gtk_widget_show (label);
}
}
static void
gimp_histogram_editor_docked_iface_init (GimpDockedInterface *docked_iface)
{
parent_docked_iface = g_type_interface_peek_parent (docked_iface);
if (! parent_docked_iface)
parent_docked_iface = g_type_default_interface_peek (GIMP_TYPE_DOCKED);
docked_iface->set_aux_info = gimp_histogram_editor_set_aux_info;
docked_iface->get_aux_info = gimp_histogram_editor_get_aux_info;
}
static void
gimp_histogram_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (object);
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
switch (property_id)
{
case PROP_TRC:
editor->trc = g_value_get_enum (value);
if (editor->histogram)
{
g_clear_object (&editor->histogram);
gimp_histogram_view_set_histogram (view, NULL);
}
if (editor->bg_histogram)
{
g_clear_object (&editor->bg_histogram);
gimp_histogram_view_set_background (view, NULL);
}
gimp_histogram_editor_update (editor);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_histogram_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (object);
switch (property_id)
{
case PROP_TRC:
g_value_set_enum (value, editor->trc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_histogram_editor_set_aux_info (GimpDocked *docked,
GList *aux_info)
{
GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (docked);
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
parent_docked_iface->set_aux_info (docked, aux_info);
gimp_session_info_aux_set_props (G_OBJECT (view), aux_info,
"histogram-channel",
"histogram-scale",
NULL);
}
static GList *
gimp_histogram_editor_get_aux_info (GimpDocked *docked)
{
GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (docked);
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
GList *aux_info;
aux_info = parent_docked_iface->get_aux_info (docked);
return g_list_concat (aux_info,
gimp_session_info_aux_new_from_props (G_OBJECT (view),
"histogram-channel",
"histogram-scale",
NULL));
}
static void
gimp_histogram_editor_set_image (GimpImageEditor *image_editor,
GimpImage *image)
{
GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (image_editor);
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
if (image_editor->image)
{
if (editor->idle_id)
{
g_source_remove (editor->idle_id);
editor->idle_id = 0;
}
g_signal_handlers_disconnect_by_func (image_editor->image,
gimp_histogram_editor_update,
editor);
g_signal_handlers_disconnect_by_func (image_editor->image,
gimp_histogram_editor_layer_changed,
editor);
g_signal_handlers_disconnect_by_func (image_editor->image,
gimp_histogram_editor_menu_update,
editor);
if (editor->histogram)
{
g_clear_object (&editor->histogram);
gimp_histogram_view_set_histogram (view, NULL);
}
if (editor->bg_histogram)
{
g_clear_object (&editor->bg_histogram);
gimp_histogram_view_set_background (view, NULL);
}
}
GIMP_IMAGE_EDITOR_CLASS (parent_class)->set_image (image_editor, image);
if (image)
{
g_signal_connect_object (image, "mode-changed",
G_CALLBACK (gimp_histogram_editor_menu_update),
editor, G_CONNECT_SWAPPED);
g_signal_connect_object (image, "active-layer-changed",
G_CALLBACK (gimp_histogram_editor_layer_changed),
editor, 0);
g_signal_connect_object (image, "mask-changed",
G_CALLBACK (gimp_histogram_editor_update),
editor, G_CONNECT_SWAPPED);
}
gimp_histogram_editor_layer_changed (image, editor);
}
GtkWidget *
gimp_histogram_editor_new (void)
{
return g_object_new (GIMP_TYPE_HISTOGRAM_EDITOR, NULL);
}
static void
gimp_histogram_editor_layer_changed (GimpImage *image,
GimpHistogramEditor *editor)
{
if (editor->drawable)
{
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
if (editor->histogram)
{
g_clear_object (&editor->histogram);
gimp_histogram_view_set_histogram (view, NULL);
}
if (editor->bg_histogram)
{
g_clear_object (&editor->bg_histogram);
gimp_histogram_view_set_background (view, NULL);
}
g_signal_handlers_disconnect_by_func (editor->drawable,
gimp_histogram_editor_name_update,
editor);
g_signal_handlers_disconnect_by_func (editor->drawable,
gimp_histogram_editor_menu_update,
editor);
g_signal_handlers_disconnect_by_func (editor->drawable,
gimp_histogram_editor_update,
editor);
g_signal_handlers_disconnect_by_func (editor->drawable,
gimp_histogram_editor_buffer_update,
editor);
g_signal_handlers_disconnect_by_func (editor->drawable,
gimp_histogram_editor_frozen_update,
editor);
editor->drawable = NULL;
}
if (image)
editor->drawable = (GimpDrawable *) gimp_image_get_active_layer (image);
gimp_histogram_editor_menu_update (editor);
if (editor->drawable)
{
g_signal_connect_object (editor->drawable, "notify::frozen",
G_CALLBACK (gimp_histogram_editor_frozen_update),
editor, G_CONNECT_SWAPPED);
g_signal_connect_object (editor->drawable, "notify::buffer",
G_CALLBACK (gimp_histogram_editor_buffer_update),
editor, G_CONNECT_SWAPPED);
g_signal_connect_object (editor->drawable, "update",
G_CALLBACK (gimp_histogram_editor_update),
editor, G_CONNECT_SWAPPED);
g_signal_connect_object (editor->drawable, "alpha-changed",
G_CALLBACK (gimp_histogram_editor_menu_update),
editor, G_CONNECT_SWAPPED);
g_signal_connect_object (editor->drawable, "name-changed",
G_CALLBACK (gimp_histogram_editor_name_update),
editor, G_CONNECT_SWAPPED);
gimp_histogram_editor_buffer_update (editor, NULL);
}
else if (editor->histogram)
{
editor->recompute = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (editor->box));
}
gimp_histogram_editor_info_update (editor);
gimp_histogram_editor_name_update (editor);
}
static void
gimp_histogram_editor_calculate_async_callback (GimpAsync *async,
GimpHistogramEditor *editor)
{
if (gimp_async_is_finished (async))
gimp_histogram_editor_info_update (editor);
}
static gboolean
gimp_histogram_editor_validate (GimpHistogramEditor *editor)
{
if (editor->recompute || ! editor->histogram)
{
if (editor->drawable &&
/* avoid calculating the histogram of a detached layer. this can
* happen during gimp_image_remove_layer(), as a result of a pending
* "expose-event" signal (handled in
* gimp_histogram_editor_view_expose()) executed through
* gtk_tree_view_clamp_node_visible(), as a result of the
* GimpLayerTreeView in the Layers dialog receiving the image's
* "active-layer-changed" signal before us. See bug #795716,
* comment 6.
*/
gimp_item_is_attached (GIMP_ITEM (editor->drawable)))
{
GimpAsync *async;
if (! editor->histogram)
{
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
editor->histogram = gimp_histogram_new (editor->trc);
gimp_histogram_view_set_histogram (view, editor->histogram);
}
async = gimp_drawable_calculate_histogram_async (editor->drawable,
editor->histogram,
TRUE);
gimp_async_add_callback (
async,
(GimpAsyncCallback) gimp_histogram_editor_calculate_async_callback,
editor);
g_object_unref (async);
}
else if (editor->histogram)
{
gimp_histogram_clear_values (editor->histogram);
gimp_histogram_editor_info_update (editor);
}
editor->recompute = FALSE;
if (editor->idle_id)
{
g_source_remove (editor->idle_id);
editor->idle_id = 0;
}
}
return (editor->histogram != NULL);
}
static void
gimp_histogram_editor_frozen_update (GimpHistogramEditor *editor,
const GParamSpec *pspec)
{
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
if (gimp_viewable_preview_is_frozen (GIMP_VIEWABLE (editor->drawable)))
{
/* Only do the background histogram if the histogram is visible.
* This is a workaround for the fact that recalculating the
* histogram is expensive and that it is only validated when it
* is shown. So don't slow down painting by doing something that
* is not even seen by the user.
*/
if (! editor->bg_histogram &&
gtk_widget_is_drawable (GTK_WIDGET (editor)))
{
if (gimp_histogram_editor_validate (editor))
editor->bg_histogram = gimp_histogram_duplicate (editor->histogram);
gimp_histogram_view_set_background (view, editor->bg_histogram);
}
}
else if (editor->bg_histogram)
{
g_clear_object (&editor->bg_histogram);
gimp_histogram_view_set_background (view, NULL);
}
}
static void
gimp_histogram_editor_buffer_update (GimpHistogramEditor *editor,
const GParamSpec *pspec)
{
g_object_set (editor,
"trc", gimp_drawable_get_trc (editor->drawable),
NULL);
}
static void
gimp_histogram_editor_update (GimpHistogramEditor *editor)
{
if (editor->idle_id)
g_source_remove (editor->idle_id);
editor->idle_id =
g_timeout_add_full (G_PRIORITY_LOW,
200,
(GSourceFunc) gimp_histogram_editor_idle_update,
editor,
NULL);
}
static gboolean
gimp_histogram_editor_idle_update (GimpHistogramEditor *editor)
{
editor->idle_id = 0;
/* Mark the histogram for recomputation and queue a redraw.
* We will then recalculate the histogram when the view is exposed.
*/
editor->recompute = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (editor->box));
return FALSE;
}
static gboolean
gimp_histogram_editor_channel_valid (GimpHistogramEditor *editor,
GimpHistogramChannel channel)
{
if (editor->drawable)
{
switch (channel)
{
case GIMP_HISTOGRAM_VALUE:
return TRUE;
case GIMP_HISTOGRAM_RED:
case GIMP_HISTOGRAM_GREEN:
case GIMP_HISTOGRAM_BLUE:
case GIMP_HISTOGRAM_LUMINANCE:
case GIMP_HISTOGRAM_RGB:
return gimp_drawable_is_rgb (editor->drawable);
case GIMP_HISTOGRAM_ALPHA:
return gimp_drawable_has_alpha (editor->drawable);
}
}
return TRUE;
}
static gboolean
gimp_histogram_menu_sensitivity (gint value,
gpointer data)
{
GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (data);
GimpHistogramChannel channel = value;
if (editor->drawable)
return gimp_histogram_editor_channel_valid (editor, channel);
return FALSE;
}
static void
gimp_histogram_editor_menu_update (GimpHistogramEditor *editor)
{
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
gtk_widget_queue_draw (editor->menu);
if (! gimp_histogram_editor_channel_valid (editor, view->channel))
{
gimp_histogram_view_set_channel (view, GIMP_HISTOGRAM_VALUE);
}
}
static void
gimp_histogram_editor_name_update (GimpHistogramEditor *editor)
{
const gchar *name = NULL;
if (editor->drawable)
name = gimp_object_get_name (editor->drawable);
gimp_editor_set_name (GIMP_EDITOR (editor), name);
}
static void
gimp_histogram_editor_info_update (GimpHistogramEditor *editor)
{
GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view;
GimpHistogram *hist = editor->histogram;
if (hist)
{
gint n_bins;
gdouble pixels;
gdouble count;
gchar text[12];
n_bins = gimp_histogram_n_bins (hist);
pixels = gimp_histogram_get_count (hist, view->channel, 0, n_bins - 1);
count = gimp_histogram_get_count (hist, view->channel,
view->start, view->end);
g_snprintf (text, sizeof (text), "%.3f",
gimp_histogram_get_mean (hist, view->channel,
view->start, view->end));
gtk_label_set_text (GTK_LABEL (editor->labels[0]), text);
g_snprintf (text, sizeof (text), "%.3f",
gimp_histogram_get_std_dev (hist, view->channel,
view->start, view->end));
gtk_label_set_text (GTK_LABEL (editor->labels[1]), text);
g_snprintf (text, sizeof (text), "%.3f",
gimp_histogram_get_median (hist, view->channel,
view->start,
view->end));
gtk_label_set_text (GTK_LABEL (editor->labels[2]), text);
g_snprintf (text, sizeof (text), "%d", (gint) pixels);
gtk_label_set_text (GTK_LABEL (editor->labels[3]), text);
g_snprintf (text, sizeof (text), "%d", (gint) count);
gtk_label_set_text (GTK_LABEL (editor->labels[4]), text);
g_snprintf (text, sizeof (text), "%.1f", (pixels > 0 ?
(100.0 * count / pixels) :
0.0));
gtk_label_set_text (GTK_LABEL (editor->labels[5]), text);
}
else
{
gint i;
for (i = 0; i < 6; i++)
gtk_label_set_text (GTK_LABEL (editor->labels[i]), NULL);
}
}
static gboolean
gimp_histogram_editor_view_draw (GimpHistogramEditor *editor,
cairo_t *cr)
{
gimp_histogram_editor_validate (editor);
return FALSE;
}
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