Added a Window node, and made it the scene root.

Still a lot of work to do.

26 files changed, 36 insertions, 33 deletions

diff --git a/editor/animation_track_editor.cpp b/editor/animation_track_editor.cpp
index d3205ff147..7a6f43497e 100644
--- a/editor/animation_track_editor.cpp
+++ b/editor/animation_track_editor.cpp
@@ -37,7 +37,7 @@
 #include "editor/plugins/animation_player_editor_plugin.h"
 #include "editor_node.h"
 #include "editor_scale.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "servers/audio/audio_stream.h"
 
 class AnimationTrackKeyEdit : public Object {
diff --git a/editor/editor_autoload_settings.cpp b/editor/editor_autoload_settings.cpp
index 83a1e2fca2..a02346c872 100644
--- a/editor/editor_autoload_settings.cpp
+++ b/editor/editor_autoload_settings.cpp
@@ -35,7 +35,7 @@
 #include "editor_node.h"
 #include "editor_scale.h"
 #include "project_settings_editor.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/packed_scene.h"
 
 #define PREVIEW_LIST_MAX_SIZE 10
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 48cd479fcf..5f00bc59ac 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -169,6 +169,7 @@
 #include "editor/register_exporters.h"
 #include "editor/run_settings_dialog.h"
 #include "editor/settings_config_dialog.h"
+#include "scene/main/window.h"
 #include "servers/display_server.h"
 #include <stdio.h>
 #include <stdlib.h>
@@ -346,7 +347,7 @@ void EditorNode::_notification(int p_what) {
 
 			editor_selection->update();
 
-			scene_root->set_size_override(true, Size2(ProjectSettings::get_singleton()->get("display/window/size/width"), ProjectSettings::get_singleton()->get("display/window/size/height")));
+			//scene_root->set_size_override(true, Size2(ProjectSettings::get_singleton()->get("display/window/size/width"), ProjectSettings::get_singleton()->get("display/window/size/height")));
 
 			{ //TODO should only happen on settings changed
 				int current_filter = GLOBAL_GET("rendering/canvas_textures/default_texture_filter");
@@ -2668,10 +2669,10 @@ void EditorNode::_screenshot(bool p_use_utc) {
 
 void EditorNode::_save_screenshot(NodePath p_path) {
 
-	Viewport *viewport = EditorInterface::get_singleton()->get_editor_viewport()->get_viewport();
-	viewport->set_clear_mode(Viewport::CLEAR_MODE_ONLY_NEXT_FRAME);
+	SubViewport *viewport = Object::cast_to<SubViewport>(EditorInterface::get_singleton()->get_editor_viewport()->get_viewport());
+	viewport->set_clear_mode(SubViewport::CLEAR_MODE_ONLY_NEXT_FRAME);
 	Ref<Image> img = viewport->get_texture()->get_data();
-	viewport->set_clear_mode(Viewport::CLEAR_MODE_ALWAYS);
+	viewport->set_clear_mode(SubViewport::CLEAR_MODE_ALWAYS);
 	Error error = img->save_png(p_path);
 	ERR_FAIL_COND_MSG(error != OK, "Cannot save screenshot to file '" + p_path + "'.");
 }
@@ -5941,7 +5942,7 @@ EditorNode::EditorNode() {
 	srt->add_child(scene_root_parent);
 	scene_root_parent->set_v_size_flags(Control::SIZE_EXPAND_FILL);
 
-	scene_root = memnew(Viewport);
+	scene_root = memnew(SubViewport);
 	//scene_root->set_usage(Viewport::USAGE_2D); canvas BG mode prevents usage of this as 2D
 
 	VisualServer::get_singleton()->viewport_set_hide_scenario(scene_root->get_viewport_rid(), true);
diff --git a/editor/editor_node.h b/editor/editor_node.h
index bd285db224..c670d4954b 100644
--- a/editor/editor_node.h
+++ b/editor/editor_node.h
@@ -84,6 +84,8 @@ class Tabs;
 class TextureProgress;
 class ToolButton;
 class VSplitContainer;
+class Window;
+class SubViewport;
 
 class EditorNode : public Node {
 
@@ -206,7 +208,7 @@ private:
 		TOOL_MENU_BASE = 1000
 	};
 
-	Viewport *scene_root; //root of the scene being edited
+	SubViewport *scene_root; //root of the scene being edited
 
 	PanelContainer *scene_root_parent;
 	Control *theme_base;
@@ -724,7 +726,7 @@ public:
 
 	Node *get_edited_scene() { return editor_data.get_edited_scene_root(); }
 
-	Viewport *get_scene_root() { return scene_root; } //root of the scene being edited
+	SubViewport *get_scene_root() { return scene_root; } //root of the scene being edited
 
 	void fix_dependencies(const String &p_for_file);
 	void clear_scene() { _cleanup_scene(); }
diff --git a/editor/editor_properties.cpp b/editor/editor_properties.cpp
index 9a474ed4af..cc89f1c16a 100644
--- a/editor/editor_properties.cpp
+++ b/editor/editor_properties.cpp
@@ -35,7 +35,7 @@
 #include "editor_node.h"
 #include "editor_properties_array_dict.h"
 #include "editor_scale.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 
 ///////////////////// NULL /////////////////////////
 
diff --git a/editor/editor_settings.cpp b/editor/editor_settings.cpp
index 18f0aba030..286ca7b184 100644
--- a/editor/editor_settings.cpp
+++ b/editor/editor_settings.cpp
@@ -49,7 +49,7 @@
 #include "editor/editor_translations.gen.h"
 #include "scene/main/node.h"
 #include "scene/main/scene_tree.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 
 // PRIVATE METHODS
 
diff --git a/editor/filesystem_dock.cpp b/editor/filesystem_dock.cpp
index 171bb4105d..d52a7f25be 100644
--- a/editor/filesystem_dock.cpp
+++ b/editor/filesystem_dock.cpp
@@ -42,7 +42,7 @@
 #include "editor_scale.h"
 #include "editor_settings.h"
 #include "import_dock.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/packed_scene.h"
 #include "servers/display_server.h"
 
diff --git a/editor/plugins/animation_blend_space_2d_editor.cpp b/editor/plugins/animation_blend_space_2d_editor.cpp
index dc8f7f3724..156237a452 100644
--- a/editor/plugins/animation_blend_space_2d_editor.cpp
+++ b/editor/plugins/animation_blend_space_2d_editor.cpp
@@ -40,7 +40,7 @@
 #include "scene/animation/animation_player.h"
 #include "scene/gui/menu_button.h"
 #include "scene/gui/panel.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 
 bool AnimationNodeBlendSpace2DEditor::can_edit(const Ref<AnimationNode> &p_node) {
 
diff --git a/editor/plugins/animation_blend_tree_editor_plugin.cpp b/editor/plugins/animation_blend_tree_editor_plugin.cpp
index 931bce65d7..ecc5982fea 100644
--- a/editor/plugins/animation_blend_tree_editor_plugin.cpp
+++ b/editor/plugins/animation_blend_tree_editor_plugin.cpp
@@ -40,7 +40,7 @@
 #include "scene/gui/menu_button.h"
 #include "scene/gui/panel.h"
 #include "scene/gui/progress_bar.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 
 void AnimationNodeBlendTreeEditor::add_custom_type(const String &p_name, const Ref<Script> &p_script) {
 
diff --git a/editor/plugins/animation_player_editor_plugin.cpp b/editor/plugins/animation_player_editor_plugin.cpp
index 10d13f0188..dee595c119 100644
--- a/editor/plugins/animation_player_editor_plugin.cpp
+++ b/editor/plugins/animation_player_editor_plugin.cpp
@@ -40,7 +40,7 @@
 #include "editor/editor_settings.h"
 #include "editor/plugins/canvas_item_editor_plugin.h" // For onion skinning.
 #include "editor/plugins/spatial_editor_plugin.h" // For onion skinning.
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "servers/visual_server.h"
 
 void AnimationPlayerEditor::_node_removed(Node *p_node) {
@@ -1420,7 +1420,7 @@ void AnimationPlayerEditor::_prepare_onion_layers_2() {
 
 	// Tweak the root viewport to ensure it's rendered before our target.
 	RID root_vp = get_tree()->get_root()->get_viewport_rid();
-	Rect2 root_vp_screen_rect = get_tree()->get_root()->get_attach_to_screen_rect();
+	Rect2 root_vp_screen_rect = Rect2(Vector2(), get_tree()->get_root()->get_size());
 	VS::get_singleton()->viewport_attach_to_screen(root_vp, Rect2());
 	VS::get_singleton()->viewport_set_update_mode(root_vp, VS::VIEWPORT_UPDATE_ALWAYS);
 
diff --git a/editor/plugins/animation_state_machine_editor.cpp b/editor/plugins/animation_state_machine_editor.cpp
index 1fe57665eb..3fd0cb94a2 100644
--- a/editor/plugins/animation_state_machine_editor.cpp
+++ b/editor/plugins/animation_state_machine_editor.cpp
@@ -40,7 +40,7 @@
 #include "scene/animation/animation_player.h"
 #include "scene/gui/menu_button.h"
 #include "scene/gui/panel.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 
 bool AnimationNodeStateMachineEditor::can_edit(const Ref<AnimationNode> &p_node) {
 
diff --git a/editor/plugins/animation_tree_editor_plugin.cpp b/editor/plugins/animation_tree_editor_plugin.cpp
index cf99d2ef78..795bd3eb1b 100644
--- a/editor/plugins/animation_tree_editor_plugin.cpp
+++ b/editor/plugins/animation_tree_editor_plugin.cpp
@@ -44,7 +44,7 @@
 #include "scene/animation/animation_player.h"
 #include "scene/gui/menu_button.h"
 #include "scene/gui/panel.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/scene_string_names.h"
 
 void AnimationTreeEditor::edit(AnimationTree *p_tree) {
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index 13f4979ba2..90d3bf0641 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -50,7 +50,7 @@
 #include "scene/gui/nine_patch_rect.h"
 #include "scene/gui/viewport_container.h"
 #include "scene/main/canvas_layer.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/packed_scene.h"
 
 #define MIN_ZOOM 0.01
diff --git a/editor/plugins/material_editor_plugin.cpp b/editor/plugins/material_editor_plugin.cpp
index d388296927..a13a594d95 100644
--- a/editor/plugins/material_editor_plugin.cpp
+++ b/editor/plugins/material_editor_plugin.cpp
@@ -114,7 +114,7 @@ MaterialEditor::MaterialEditor() {
 	vc->set_stretch(true);
 	add_child(vc);
 	vc->set_anchors_and_margins_preset(PRESET_WIDE);
-	viewport = memnew(Viewport);
+	viewport = memnew(SubViewport);
 	Ref<World> world;
 	world.instance();
 	viewport->set_world(world); //use own world
diff --git a/editor/plugins/material_editor_plugin.h b/editor/plugins/material_editor_plugin.h
index 84e69425d0..895c3f80bd 100644
--- a/editor/plugins/material_editor_plugin.h
+++ b/editor/plugins/material_editor_plugin.h
@@ -48,7 +48,7 @@ class MaterialEditor : public Control {
 	GDCLASS(MaterialEditor, Control);
 
 	ViewportContainer *vc;
-	Viewport *viewport;
+	SubViewport *viewport;
 	MeshInstance *sphere_instance;
 	MeshInstance *box_instance;
 	DirectionalLight *light1;
diff --git a/editor/plugins/mesh_editor_plugin.cpp b/editor/plugins/mesh_editor_plugin.cpp
index 5a17f0d4f1..c921ca46cd 100644
--- a/editor/plugins/mesh_editor_plugin.cpp
+++ b/editor/plugins/mesh_editor_plugin.cpp
@@ -115,7 +115,7 @@ void MeshEditor::_bind_methods() {
 
 MeshEditor::MeshEditor() {
 
-	viewport = memnew(Viewport);
+	viewport = memnew(SubViewport);
 	Ref<World> world;
 	world.instance();
 	viewport->set_world(world); //use own world
diff --git a/editor/plugins/mesh_editor_plugin.h b/editor/plugins/mesh_editor_plugin.h
index 87c4a1776b..6d39d49de1 100644
--- a/editor/plugins/mesh_editor_plugin.h
+++ b/editor/plugins/mesh_editor_plugin.h
@@ -46,7 +46,7 @@ class MeshEditor : public ViewportContainer {
 	float rot_x;
 	float rot_y;
 
-	Viewport *viewport;
+	SubViewport *viewport;
 	MeshInstance *mesh_instance;
 	Spatial *rotation;
 	DirectionalLight *light1;
diff --git a/editor/plugins/mesh_library_editor_plugin.cpp b/editor/plugins/mesh_library_editor_plugin.cpp
index 4e63a498b8..f341d9ca86 100644
--- a/editor/plugins/mesh_library_editor_plugin.cpp
+++ b/editor/plugins/mesh_library_editor_plugin.cpp
@@ -36,7 +36,7 @@
 #include "scene/3d/mesh_instance.h"
 #include "scene/3d/navigation_region.h"
 #include "scene/3d/physics_body.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/packed_scene.h"
 #include "spatial_editor_plugin.h"
 
diff --git a/editor/plugins/root_motion_editor_plugin.cpp b/editor/plugins/root_motion_editor_plugin.cpp
index d932305c63..daea2eec6b 100644
--- a/editor/plugins/root_motion_editor_plugin.cpp
+++ b/editor/plugins/root_motion_editor_plugin.cpp
@@ -30,7 +30,7 @@
 
 #include "root_motion_editor_plugin.h"
 #include "editor/editor_node.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 
 void EditorPropertyRootMotion::_confirmed() {
 
diff --git a/editor/plugins/script_editor_plugin.cpp b/editor/plugins/script_editor_plugin.cpp
index 06d1c664b5..f435856cdf 100644
--- a/editor/plugins/script_editor_plugin.cpp
+++ b/editor/plugins/script_editor_plugin.cpp
@@ -45,7 +45,7 @@
 #include "editor/find_in_files.h"
 #include "editor/node_dock.h"
 #include "editor/plugins/shader_editor_plugin.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/scene_string_names.h"
 #include "script_text_editor.h"
 #include "servers/display_server.h"
diff --git a/editor/plugins/spatial_editor_plugin.cpp b/editor/plugins/spatial_editor_plugin.cpp
index d514b50460..2af64b6ed6 100644
--- a/editor/plugins/spatial_editor_plugin.cpp
+++ b/editor/plugins/spatial_editor_plugin.cpp
@@ -3834,7 +3834,7 @@ SpatialEditorViewport::SpatialEditorViewport(SpatialEditor *p_spatial_editor, Ed
 	c->set_stretch(true);
 	add_child(c);
 	c->set_anchors_and_margins_preset(Control::PRESET_WIDE);
-	viewport = memnew(Viewport);
+	viewport = memnew(SubViewport);
 	viewport->set_disable_input(true);
 
 	c->add_child(viewport);
diff --git a/editor/plugins/spatial_editor_plugin.h b/editor/plugins/spatial_editor_plugin.h
index b67459b9d0..9dad66b647 100644
--- a/editor/plugins/spatial_editor_plugin.h
+++ b/editor/plugins/spatial_editor_plugin.h
@@ -262,7 +262,7 @@ private:
 	PopupMenu *display_submenu;
 
 	Control *surface;
-	Viewport *viewport;
+	SubViewport *viewport;
 	Camera *camera;
 	bool transforming;
 	bool orthogonal;
@@ -467,7 +467,7 @@ public:
 			AABB *p_preview_bounds,
 			AcceptDialog *p_accept);
 
-	Viewport *get_viewport_node() { return viewport; }
+	SubViewport *get_viewport_node() { return viewport; }
 	Camera *get_camera() { return camera; } // return the default camera object.
 
 	SpatialEditorViewport(SpatialEditor *p_spatial_editor, EditorNode *p_editor, int p_index);
diff --git a/editor/plugins/visual_shader_editor_plugin.cpp b/editor/plugins/visual_shader_editor_plugin.cpp
index 8070e2b4d5..3b7c4897b2 100644
--- a/editor/plugins/visual_shader_editor_plugin.cpp
+++ b/editor/plugins/visual_shader_editor_plugin.cpp
@@ -42,7 +42,7 @@
 #include "scene/animation/animation_player.h"
 #include "scene/gui/menu_button.h"
 #include "scene/gui/panel.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/visual_shader_nodes.h"
 #include "servers/display_server.h"
 #include "servers/visual/shader_types.h"
diff --git a/editor/property_editor.cpp b/editor/property_editor.cpp
index feef274d33..7ba43d1246 100644
--- a/editor/property_editor.cpp
+++ b/editor/property_editor.cpp
@@ -53,7 +53,7 @@
 #include "editor/multi_node_edit.h"
 #include "editor/property_selector.h"
 #include "scene/gui/label.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/font.h"
 #include "scene/resources/packed_scene.h"
 #include "scene/scene_string_names.h"
diff --git a/editor/scene_tree_dock.cpp b/editor/scene_tree_dock.cpp
index 4382b63747..3df4367b43 100644
--- a/editor/scene_tree_dock.cpp
+++ b/editor/scene_tree_dock.cpp
@@ -44,7 +44,7 @@
 #include "editor/plugins/canvas_item_editor_plugin.h"
 #include "editor/plugins/script_editor_plugin.h"
 #include "editor/plugins/spatial_editor_plugin.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/packed_scene.h"
 #include "servers/display_server.h"
 #include "servers/visual_server.h"
diff --git a/editor/scene_tree_editor.cpp b/editor/scene_tree_editor.cpp
index 782df12d4b..0f8e748dfb 100644
--- a/editor/scene_tree_editor.cpp
+++ b/editor/scene_tree_editor.cpp
@@ -37,7 +37,7 @@
 #include "editor/plugins/animation_player_editor_plugin.h"
 #include "editor/plugins/canvas_item_editor_plugin.h"
 #include "scene/gui/label.h"
-#include "scene/main/viewport.h"
+#include "scene/main/window.h"
 #include "scene/resources/packed_scene.h"
 
 Node *SceneTreeEditor::get_scene_node() {