Fix access to render target texture for XR interfaces

servers/rendering/renderer_rd/renderer_scene_render_rd.cpp

@@ -2415,6 +2415,13 @@ RID RendererSceneRenderRD::render_buffers_get_back_depth_texture(RID p_render_bu
 	return rb->depth_back_texture;
 }
 
+RID RendererSceneRenderRD::render_buffers_get_depth_texture(RID p_render_buffers) {
+	RenderBuffers *rb = render_buffers_owner.getornull(p_render_buffers);
+	ERR_FAIL_COND_V(!rb, RID());
+
+	return rb->depth_texture;
+}
+
 RID RendererSceneRenderRD::render_buffers_get_ao_texture(RID p_render_buffers) {
 	RenderBuffers *rb = render_buffers_owner.getornull(p_render_buffers);
 	ERR_FAIL_COND_V(!rb, RID());

servers/rendering/renderer_rd/renderer_scene_render_rd.h

@@ -1197,6 +1197,7 @@ public:
 	virtual void render_buffers_configure(RID p_render_buffers, RID p_render_target, int p_width, int p_height, RS::ViewportMSAA p_msaa, RS::ViewportScreenSpaceAA p_screen_space_aa, bool p_use_debanding, uint32_t p_view_count) override;
 	virtual void gi_set_use_half_resolution(bool p_enable) override;
 
+	RID render_buffers_get_depth_texture(RID p_render_buffers);
 	RID render_buffers_get_ao_texture(RID p_render_buffers);
 	RID render_buffers_get_back_buffer_texture(RID p_render_buffers);
 	RID render_buffers_get_back_depth_texture(RID p_render_buffers);

servers/xr/xr_interface_extension.cpp

@@ -29,6 +29,7 @@
 /*************************************************************************/
 
 #include "xr_interface_extension.h"
+#include "servers/rendering/renderer_rd/renderer_storage_rd.h"
 #include "servers/rendering/renderer_storage.h"
 #include "servers/rendering/rendering_server_globals.h"
 
@@ -246,17 +247,21 @@ void XRInterfaceExtension::notification(int p_what) {
 }
 
 RID XRInterfaceExtension::get_render_target_texture(RID p_render_target) {
-	RendererStorage *storage = RSG::storage;
-	ERR_FAIL_NULL_V_MSG(storage, RID(), "Renderer storage not setup");
+	// In due time this will need to be enhance to return the correct INTERNAL RID for the chosen rendering engine.
+	// So once a GLES driver is implemented we'll return that and the implemented plugin needs to handle this correctly too.
+	RendererStorageRD *rd_storage = RendererStorageRD::base_singleton;
+	ERR_FAIL_NULL_V_MSG(rd_storage, RID(), "Renderer storage not setup");
 
-	return storage->render_target_get_texture(p_render_target);
+	return rd_storage->render_target_get_rd_texture(p_render_target);
 }
 
 /*
 RID XRInterfaceExtension::get_render_target_depth(RID p_render_target) {
-	RendererStorage *storage = RSG::storage;
-	ERR_FAIL_NULL_V_MSG(storage, RID(), "Renderer storage not setup");
+	// TODO implement this, the problem is that our depth texture isn't part of our render target as it is used for 3D rendering only
+	// but we don't have access to our render buffers from here....
+	RendererSceneRenderRD * rd_scene = ?????;
+	ERR_FAIL_NULL_V_MSG(rd_scene, RID(), "Renderer scene render not setup");
 
-	return storage->render_target_get_depth(p_render_target);
+	return rd_scene->render_buffers_get_depth_texture(????????????);
 }
 */