[gtk+] css: Implement filter

[Benjamin Otte <otte src gnome org>]

commit 959f80e6e9b120ffc905d0f5be7740cc933d055f
Author: Benjamin Otte <otte redhat com>
Date:   Sat Dec 31 02:48:25 2016 +0100

    css: Implement filter
    
    So far, it's only implemented for widgets, not for gadgets.
    
    Not sure how to do it for gadgets without conflicts for widget gadgets
    yet...

 gtk/gtkcssstylepropertyimpl.c |    8 ++++++++
 gtk/gtkwidget.c               |    9 ++++++++-
 2 files changed, 16 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcssstylepropertyimpl.c b/gtk/gtkcssstylepropertyimpl.c
index 15ea1ca..20d2988 100644
--- a/gtk/gtkcssstylepropertyimpl.c
+++ b/gtk/gtkcssstylepropertyimpl.c
@@ -1594,6 +1594,14 @@ _gtk_css_style_property_init_properties (void)
                                           opacity_parse,
                                           opacity_query,
                                           _gtk_css_number_value_new (1, GTK_CSS_NUMBER));
+  gtk_css_style_property_register        ("filter",
+                                          GTK_CSS_PROPERTY_FILTER,
+                                          G_TYPE_NONE,
+                                          GTK_STYLE_PROPERTY_ANIMATED,
+                                          GTK_CSS_AFFECTS_REDRAW,
+                                          filter_value_parse,
+                                          NULL,
+                                          gtk_css_filter_value_new_none ());
 
   /* Private property holding the binding sets */
   gtk_css_style_property_register        ("-gtk-key-bindings",
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 04dfc04..8b52b6c 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -37,9 +37,10 @@
 #include "gtkaccelmapprivate.h"
 #include "gtkaccelgroupprivate.h"
 #include "gtkclipboard.h"
-#include "gtkcssstylepropertyprivate.h"
+#include "gtkcssfiltervalueprivate.h"
 #include "gtkcssnumbervalueprivate.h"
 #include "gtkcssshadowsvalueprivate.h"
+#include "gtkcssstylepropertyprivate.h"
 #include "gtkintl.h"
 #include "gtkmarshalers.h"
 #include "gtkselectionprivate.h"
@@ -15534,6 +15535,7 @@ gtk_widget_snapshot (GtkWidget   *widget,
 {
   GtkWidgetClass *klass = GTK_WIDGET_GET_CLASS (widget);
   graphene_rect_t bounds;
+  GtkCssValue *filter_value;
   GtkAllocation clip;
   GtkAllocation alloc;
   RenderMode mode;
@@ -15563,6 +15565,9 @@ gtk_widget_snapshot (GtkWidget   *widget,
   if (GTK_DEBUG_CHECK (SNAPSHOT))
     gtk_snapshot_push (snapshot, TRUE, "%s<%p>", gtk_widget_get_name (widget), widget);
 
+  filter_value = _gtk_style_context_peek_property (gtk_widget_get_style_context (widget), 
GTK_CSS_PROPERTY_FILTER);
+  gtk_css_filter_value_push_snapshot (filter_value, snapshot);
+
   if (mode == RENDER_DRAW)
     {
       cairo_t *cr;
@@ -15599,6 +15604,8 @@ gtk_widget_snapshot (GtkWidget   *widget,
         gtk_snapshot_pop_and_append (snapshot);
     }
 
+  gtk_css_filter_value_pop_snapshot (filter_value, snapshot);
+
   if (GTK_DEBUG_CHECK (SNAPSHOT))
     gtk_snapshot_pop_and_append (snapshot);
 }