[gtk/wip/baedert/nodeeditor: 3/18] inspector: Show alternative renderings

[Timm Bäder <baedert src gnome org>]

commit e00bd2c54f18e2c39b5d91d2c0325817baa55181
Author: Timm Bäder <mail baedert org>
Date:   Tue Apr 16 06:11:45 2019 +0200

    inspector: Show alternative renderings

 gtk/inspector/magnifier.c  | 163 +++++++++++++++++++++++++++++++++++++++++----
 gtk/inspector/magnifier.ui |  16 ++++-
 gtk/meson.build            |   1 +
 3 files changed, 164 insertions(+), 16 deletions(-)
---
diff --git a/gtk/inspector/magnifier.c b/gtk/inspector/magnifier.c
index 34cf33fa19..4e826135a4 100644
--- a/gtk/inspector/magnifier.c
+++ b/gtk/inspector/magnifier.c
@@ -22,9 +22,22 @@
 
 #include "gtkmagnifierprivate.h"
 
-#include "gtklabel.h"
 #include "gtkadjustment.h"
 #include "gtkstack.h"
+#include "gtklabel.h"
+#include "gtklistbox.h"
+#include "gtkpicture.h"
+#include "gtkrendererpaintableprivate.h"
+#include "gtkwidgetpaintable.h"
+
+#ifdef GDK_WINDOWING_BROADWAY
+#include "gsk/gskbroadwayrendererprivate.h"
+#endif
+#include "gsk/gskcairorendererprivate.h"
+#include "gsk/gl/gskglrendererprivate.h"
+#ifdef GDK_RENDERING_VULKAN
+#include "gsk/vulkan/gskvulkanrendererprivate.h"
+#endif
 
 enum
 {
@@ -36,43 +49,149 @@ struct _GtkInspectorMagnifierPrivate
 {
   GtkWidget *object;
   GtkWidget *magnifier;
+  GtkWidget *renderer_listbox;
   GtkAdjustment *adjustment;
+  GListStore *renderers;
+  GdkPaintable *paintable;
 };
 
 G_DEFINE_TYPE_WITH_PRIVATE (GtkInspectorMagnifier, gtk_inspector_magnifier, GTK_TYPE_BOX)
 
 static void
-gtk_inspector_magnifier_init (GtkInspectorMagnifier *sl)
+gtk_inspector_magnifier_add_renderer (GtkInspectorMagnifier *self,
+                                      GType                  renderer_type,
+                                      const char            *description)
+{
+  GtkInspectorMagnifierPrivate *priv = gtk_inspector_magnifier_get_instance_private (self);
+  GskRenderer *renderer;
+  GdkSurface *surface;
+  GdkPaintable *paintable;
+
+  surface = gtk_widget_get_surface (GTK_WIDGET (self));
+  g_assert (surface != NULL);
+
+  if (renderer_type == G_TYPE_NONE)
+    renderer = NULL;
+  else
+    {
+      renderer = g_object_new (renderer_type, NULL);
+
+      if (!gsk_renderer_realize (renderer, surface, NULL))
+        {
+          g_object_unref (renderer);
+          return;
+        }
+    }
+
+  paintable = gtk_renderer_paintable_new (renderer, priv->paintable);
+  g_object_set_data_full (G_OBJECT (paintable), "description", g_strdup (description), g_free);
+  g_object_unref (renderer);
+
+  g_list_store_append (priv->renderers, paintable);
+  g_object_unref (paintable);
+}
+
+static void
+gtk_inspector_magnifier_realize (GtkWidget *widget)
+{
+  GtkInspectorMagnifier *self = GTK_INSPECTOR_MAGNIFIER (widget);
+
+  GTK_WIDGET_CLASS (gtk_inspector_magnifier_parent_class)->realize (widget);
+
+  gtk_inspector_magnifier_add_renderer (self,
+                                        G_TYPE_NONE,
+                                        "Default");
+  gtk_inspector_magnifier_add_renderer (self,
+                                        GSK_TYPE_GL_RENDERER,
+                                        "OpenGL");
+#ifdef GDK_RENDERING_VULKAN
+  gtk_inspector_magnifier_add_renderer (self,
+                                        GSK_TYPE_VULKAN_RENDERER,
+                                        "Vulkan");
+#endif
+#ifdef GDK_WINDOWING_BROADWAY
+  gtk_inspector_magnifier_add_renderer (self,
+                                        GSK_TYPE_BROADWAY_RENDERER,
+                                        "Broadway");
+#endif
+  gtk_inspector_magnifier_add_renderer (self,
+                                        GSK_TYPE_CAIRO_RENDERER,
+                                        "Cairo");
+}
+
+static void
+gtk_inspector_magnifier_unrealize (GtkWidget *widget)
+{
+  GtkInspectorMagnifier *self = GTK_INSPECTOR_MAGNIFIER (widget);
+  GtkInspectorMagnifierPrivate *priv = gtk_inspector_magnifier_get_instance_private (self);
+
+  g_list_store_remove_all (priv->renderers);
+
+  GTK_WIDGET_CLASS (gtk_inspector_magnifier_parent_class)->unrealize (widget);
+}
+
+static GtkWidget *
+gtk_inspector_magnifier_create_renderer_widget (gpointer item,
+                                                gpointer user_data)
+{
+  GdkPaintable *paintable = item;
+  GtkWidget *box, *label, *picture;
+
+  box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+  gtk_widget_set_size_request (box, 160, 120);
+
+  label = gtk_label_new (g_object_get_data (G_OBJECT (paintable), "description"));
+  gtk_container_add (GTK_CONTAINER (box), label);
+
+  picture = gtk_picture_new_for_paintable (paintable);
+  gtk_container_add (GTK_CONTAINER (box), picture);
+
+  return box;
+}
+
+static void
+gtk_inspector_magnifier_init (GtkInspectorMagnifier *self)
 {
-  sl->priv = gtk_inspector_magnifier_get_instance_private (sl);
-  gtk_widget_init_template (GTK_WIDGET (sl));
+  self->priv = gtk_inspector_magnifier_get_instance_private (self);
+  gtk_widget_init_template (GTK_WIDGET (self));
+
+  self->priv->renderers = g_list_store_new (GDK_TYPE_PAINTABLE);
+  gtk_list_box_bind_model (GTK_LIST_BOX (self->priv->renderer_listbox),
+                           G_LIST_MODEL (self->priv->renderers),
+                           gtk_inspector_magnifier_create_renderer_widget,
+                           self,
+                           NULL);
+  self->priv->paintable = gtk_widget_paintable_new (NULL);
 }
 
 void
-gtk_inspector_magnifier_set_object (GtkInspectorMagnifier *sl,
-                                    GObject              *object)
+gtk_inspector_magnifier_set_object (GtkInspectorMagnifier *self,
+                                    GObject               *object)
 {
+  GtkInspectorMagnifierPrivate *priv = gtk_inspector_magnifier_get_instance_private (self);
   GtkWidget *stack;
   GtkStackPage *page;
 
-  stack = gtk_widget_get_parent (GTK_WIDGET (sl));
-  page = gtk_stack_get_page (GTK_STACK (stack), GTK_WIDGET (sl));
+  stack = gtk_widget_get_parent (GTK_WIDGET (self));
+  page = gtk_stack_get_page (GTK_STACK (stack), GTK_WIDGET (self));
 
-  sl->priv->object = NULL;
+  priv->object = NULL;
 
   if (!GTK_IS_WIDGET (object) || !gtk_widget_is_visible (GTK_WIDGET (object)))
     {
       g_object_set (page, "visible", FALSE, NULL);
-      _gtk_magnifier_set_inspected (GTK_MAGNIFIER (sl->priv->magnifier), NULL);
+      _gtk_magnifier_set_inspected (GTK_MAGNIFIER (priv->magnifier), NULL);
+      gtk_widget_paintable_set_widget (GTK_WIDGET_PAINTABLE (priv->paintable), NULL);
       return;
     }
 
   g_object_set (page, "visible", TRUE, NULL);
 
-  sl->priv->object = GTK_WIDGET (object);
+  priv->object = GTK_WIDGET (object);
 
-  _gtk_magnifier_set_inspected (GTK_MAGNIFIER (sl->priv->magnifier), GTK_WIDGET (object));
-  _gtk_magnifier_set_coords (GTK_MAGNIFIER (sl->priv->magnifier), 0, 0);
+  _gtk_magnifier_set_inspected (GTK_MAGNIFIER (priv->magnifier), GTK_WIDGET (object));
+  gtk_widget_paintable_set_widget (GTK_WIDGET_PAINTABLE (priv->paintable), GTK_WIDGET (object));
+  _gtk_magnifier_set_coords (GTK_MAGNIFIER (priv->magnifier), 0, 0);
 }
 
 static void
@@ -115,6 +234,17 @@ set_property (GObject      *object,
     }
 }
 
+static void
+gtk_inspector_magnifier_dispose (GObject *object)
+{
+  GtkInspectorMagnifier *self = GTK_INSPECTOR_MAGNIFIER (object);
+  GtkInspectorMagnifierPrivate *priv = gtk_inspector_magnifier_get_instance_private (self);
+
+  g_clear_object (&priv->renderers);
+
+  G_OBJECT_CLASS (gtk_inspector_magnifier_parent_class)->dispose (object);
+}
+
 static void
 constructed (GObject *object)
 {
@@ -123,6 +253,8 @@ constructed (GObject *object)
   g_object_bind_property (sl->priv->adjustment, "value",
                           sl->priv->magnifier, "magnification",
                           G_BINDING_SYNC_CREATE);
+
+  G_OBJECT_CLASS (gtk_inspector_magnifier_parent_class)->constructed (object);
 }
 
 static void
@@ -133,14 +265,19 @@ gtk_inspector_magnifier_class_init (GtkInspectorMagnifierClass *klass)
 
   object_class->get_property = get_property;
   object_class->set_property = set_property;
+  object_class->dispose = gtk_inspector_magnifier_dispose;
   object_class->constructed = constructed;
 
   g_object_class_install_property (object_class, PROP_ADJUSTMENT,
       g_param_spec_object ("adjustment", NULL, NULL,
                            GTK_TYPE_ADJUSTMENT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 
+  widget_class->realize = gtk_inspector_magnifier_realize;
+  widget_class->unrealize = gtk_inspector_magnifier_unrealize;
+
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/inspector/magnifier.ui");
   gtk_widget_class_bind_template_child_private (widget_class, GtkInspectorMagnifier, magnifier);
+  gtk_widget_class_bind_template_child_private (widget_class, GtkInspectorMagnifier, renderer_listbox);
 }
 
 // vim: set et sw=2 ts=2:
diff --git a/gtk/inspector/magnifier.ui b/gtk/inspector/magnifier.ui
index 27d72e9ba1..f8bb2ff25f 100644
--- a/gtk/inspector/magnifier.ui
+++ b/gtk/inspector/magnifier.ui
@@ -5,9 +5,19 @@
       <object class="GtkScrolledWindow">
         <property name="expand">1</property>
         <child>
-          <object class="GtkMagnifier" id="magnifier">
-            <property name="visible">True</property>
-            <property name="resize">True</property>
+          <object class="GtkBox">
+            <child>
+              <object class="GtkMagnifier" id="magnifier">
+                <property name="hexpand">True</property>
+                <property name="vexpand">True</property>
+                <property name="resize">True</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkListBox" id="renderer_listbox">
+                <property name="width-request">240</property>
+              </object>
+            </child>
           </object>
         </child>
       </object>
diff --git a/gtk/meson.build b/gtk/meson.build
index 76fef838f5..59f5749551 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -313,6 +313,7 @@ gtk_public_sources = files([
   'gtkrenderbackground.c',
   'gtkrenderborder.c',
   'gtkrendericon.c',
+  'gtkrendererpaintable.c',
   'gtkrendernodepaintable.c',
   'gtkrevealer.c',
   'gtkroot.c',