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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:23:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 16:23:22 +0000 |
commit | e42129241681dde7adae7d20697e7b421682fbb4 (patch) | |
tree | af1fe815a5e639e68e59fabd8395ec69458b3e5e /app/widgets/gimphistogrameditor.c | |
parent | Initial commit. (diff) | |
download | gimp-upstream.tar.xz gimp-upstream.zip |
Adding upstream version 2.10.22.upstream/2.10.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'app/widgets/gimphistogrameditor.c')
-rw-r--r-- | app/widgets/gimphistogrameditor.c | 757 |
1 files changed, 757 insertions, 0 deletions
diff --git a/app/widgets/gimphistogrameditor.c b/app/widgets/gimphistogrameditor.c new file mode 100644 index 0000000..ae21eec --- /dev/null +++ b/app/widgets/gimphistogrameditor.c @@ -0,0 +1,757 @@ +/* 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_LINEAR +}; + + +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_expose (GimpHistogramEditor *editor); + + +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_LINEAR, + g_param_spec_boolean ("linear", + _("Linear"), NULL, + TRUE, + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT)); +} + +static void +gimp_histogram_editor_init (GimpHistogramEditor *editor) +{ + GimpHistogramView *view; + GtkWidget *hbox; + GtkWidget *label; + GtkWidget *menu; + GtkWidget *table; + 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_boolean_icon_box_new (G_OBJECT (editor), "linear", + GIMP_ICON_COLOR_SPACE_LINEAR, + GIMP_ICON_COLOR_SPACE_PERCEPTUAL, + _("Show values in linear space"), + _("Show values in perceptual space")); + 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, "expose-event", + G_CALLBACK (gimp_histogram_editor_view_expose), + editor); + + table = gtk_table_new (3, 4, FALSE); + gtk_table_set_col_spacings (GTK_TABLE (table), 2); + gtk_table_set_col_spacing (GTK_TABLE (table), 1, 6); + gtk_box_pack_start (GTK_BOX (editor), table, FALSE, FALSE, 0); + gtk_widget_show (table); + + 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_table_attach (GTK_TABLE (table), label, x, x + 1, y, y + 1, + GTK_FILL | GTK_EXPAND, GTK_FILL, 2, 2); + 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_table_attach (GTK_TABLE (table), label, x + 1, x + 2, y, y + 1, + GTK_FILL, GTK_FILL, 2, 2); + 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_LINEAR: + editor->linear = g_value_get_boolean (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_LINEAR: + g_value_set_boolean (value, editor->linear); + 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; + } + + editor->update_pending = FALSE; + + 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) +{ + editor->calculate_async = NULL; + + if (gimp_async_is_finished (async) && editor->histogram) + { + if (editor->bg_pending) + { + GimpHistogramView *view = GIMP_HISTOGRAM_BOX (editor->box)->view; + + editor->bg_histogram = gimp_histogram_duplicate (editor->histogram); + + gimp_histogram_view_set_background (view, editor->bg_histogram); + } + + gimp_histogram_editor_info_update (editor); + } + + editor->bg_pending = FALSE; + + if (editor->update_pending) + gimp_histogram_editor_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->linear); + + gimp_histogram_clear_values ( + editor->histogram, + babl_format_get_n_components ( + gimp_drawable_get_format (editor->drawable))); + + gimp_histogram_view_set_histogram (view, editor->histogram); + } + + async = gimp_drawable_calculate_histogram_async (editor->drawable, + editor->histogram, + TRUE); + + editor->calculate_async = async; + + 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, 0); + + 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 (editor->idle_id) + { + g_source_remove (editor->idle_id); + + gimp_histogram_editor_idle_update (editor); + } + + if (gimp_histogram_editor_validate (editor)) + { + if (editor->calculate_async) + { + editor->bg_pending = TRUE; + } + else + { + 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); + } + + editor->bg_pending = FALSE; + + if (editor->update_pending) + gimp_async_cancel_and_wait (editor->calculate_async); + } +} + +static void +gimp_histogram_editor_buffer_update (GimpHistogramEditor *editor, + const GParamSpec *pspec) +{ + g_object_set (editor, + "linear", gimp_drawable_get_linear (editor->drawable), + NULL); +} + +static void +gimp_histogram_editor_update (GimpHistogramEditor *editor) +{ + if (editor->bg_pending) + { + editor->update_pending = TRUE; + + return; + } + + editor->update_pending = FALSE; + + if (editor->calculate_async) + gimp_async_cancel_and_wait (editor->calculate_async); + + 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_menu_sensitivity (gint value, + gpointer data) +{ + GimpHistogramEditor *editor = GIMP_HISTOGRAM_EDITOR (data); + GimpHistogramChannel channel = value; + + if (editor->histogram) + return gimp_histogram_has_channel (editor->histogram, 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 (editor->histogram && + ! gimp_histogram_has_channel (editor->histogram, 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_expose (GimpHistogramEditor *editor) +{ + gimp_histogram_editor_validate (editor); + + return FALSE; +} |