-Fixes on atlas import to save memory if mipmaps are not used

-Make the video memory visible to improve debugging

tools/editor/io_plugins/editor_texture_import_plugin.cpp

@@ -1180,8 +1180,15 @@ Error EditorTextureImportPlugin::import2(const String& p_path, const Ref<Resourc
 
 		ep.step("Blitting Images",sources.size()+2);
 
+		bool blit_to_po2=tex_flags&Texture::FLAG_MIPMAPS;
+		int atlas_w=dst_size.width;
+		int atlas_h=dst_size.height;
+		if (blit_to_po2) {
+			atlas_w=nearest_power_of_2(dst_size.width);
+			atlas_h=nearest_power_of_2(dst_size.height);
+		}
 		Image atlas;
-		atlas.create(nearest_power_of_2(dst_size.width),nearest_power_of_2(dst_size.height),0,alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB);
+		atlas.create(atlas_w,atlas_h,0,alpha?Image::FORMAT_RGBA:Image::FORMAT_RGB);
 
 
 		atlases.resize(from->get_source_count());
@@ -1210,16 +1217,21 @@ Error EditorTextureImportPlugin::import2(const String& p_path, const Ref<Resourc
 			ERR_CONTINUE( !source_map.has(i) );
 			for (List<int>::Element *E=source_map[i].front();E;E=E->next()) {
 
-				Ref<AtlasTexture> at = memnew( AtlasTexture );
+				String apath = p_path.get_base_dir().plus_file(from->get_source_path(E->get()).get_file().basename()+".atex");
+
+				Ref<AtlasTexture> at;
 
+				if (ResourceCache::has(apath)) {
+					at = Ref<AtlasTexture>( ResourceCache::get(apath)->cast_to<AtlasTexture>() );
+				} else {
 
+					at = Ref<AtlasTexture>( memnew( AtlasTexture ) );
+				}
 				at->set_region(region);
 				at->set_margin(margin);
-				String apath = p_path.get_base_dir().plus_file(from->get_source_path(E->get()).get_file().basename()+".atex");
 				at->set_path(apath);
 				atlases[E->get()]=at;
 				print_line("Atlas Tex: "+apath);
-
 			}
 		}
 		if (ResourceCache::has(p_path)) {

tools/editor/script_editor_debugger.cpp

@@ -1322,6 +1322,38 @@ ScriptEditorDebugger::ScriptEditorDebugger(EditorNode *p_editor){
 
 	}
 
+	VBoxContainer *vmem_vb = memnew( VBoxContainer );
+	HBoxContainer *vmem_hb = memnew( HBoxContainer );
+	Label *vmlb = memnew(Label("List of Video Memory Usage by Resource: ") );
+	vmlb->set_h_size_flags(SIZE_EXPAND_FILL);
+	vmem_hb->add_child( vmlb );
+	vmem_refresh = memnew( Button );
+	vmem_hb->add_child(vmem_refresh);
+	vmem_vb->add_child(vmem_hb);
+
+	MarginContainer *vmmc = memnew( MarginContainer );
+	vmmc = memnew( MarginContainer );
+	vmem_tree = memnew( Tree );
+	vmem_tree->set_v_size_flags(SIZE_EXPAND_FILL);
+	vmem_tree->set_h_size_flags(SIZE_EXPAND_FILL);
+	vmmc->add_child(vmem_tree);
+	vmmc->set_v_size_flags(SIZE_EXPAND_FILL);
+	vmem_vb->add_child(vmmc);
+
+	vmem_vb->set_name("Video Mem");
+	vmem_tree->set_columns(3);
+	vmem_tree->set_column_titles_visible(true);
+	vmem_tree->set_column_title(0,"Resource Path");
+	vmem_tree->set_column_expand(0,true);
+	vmem_tree->set_column_expand(1,false);
+	vmem_tree->set_column_title(1,"Type");
+	vmem_tree->set_column_min_width(1,150);
+	vmem_tree->set_column_expand(2,false);
+	vmem_tree->set_column_title(2,"Usage");
+	vmem_tree->set_column_min_width(2,150);
+
+	tabs->add_child(vmem_vb);
+
 	info = memnew( HSplitContainer );
 	info->set_name("Info");
 	tabs->add_child(info);

tools/editor/script_editor_debugger.h

@@ -96,6 +96,9 @@ class ScriptEditorDebugger : public Control {
 	Tree *perf_monitors;
 	Control *perf_draw;
 
+	Tree *vmem_tree;
+	Button *vmem_refresh;
+
 	Tree *stack_dump;
 	PropertyEditor *inspector;