Add FidelityFX Super Resolution 2.2 (FSR 2.2.1) support.

Introduces support for FSR2 as a new upscaler option available from the project settings. Also introduces an specific render list for surfaces that require motion and the ability to derive motion vectors from depth buffer and camera motion.

1 files changed, 18 insertions, 5 deletions

diff --git a/servers/rendering/renderer_rd/effects/debug_effects.cpp b/servers/rendering/renderer_rd/effects/debug_effects.cpp
index 357d035ae9..abcd9bbfae 100644
--- a/servers/rendering/renderer_rd/effects/debug_effects.cpp
+++ b/servers/rendering/renderer_rd/effects/debug_effects.cpp
@@ -340,25 +340,38 @@ void DebugEffects::draw_shadow_frustum(RID p_light, const Projection &p_cam_proj
 	}
 }
 
-void DebugEffects::draw_motion_vectors(RID p_velocity, RID p_dest_fb, Size2i p_velocity_size) {
+void DebugEffects::draw_motion_vectors(RID p_velocity, RID p_depth, RID p_dest_fb, const Projection &p_current_projection, const Transform3D &p_current_transform, const Projection &p_previous_projection, const Transform3D &p_previous_transform, Size2i p_resolution) {
 	MaterialStorage *material_storage = MaterialStorage::get_singleton();
 	ERR_FAIL_NULL(material_storage);
 
 	UniformSetCacheRD *uniform_set_cache = UniformSetCacheRD::get_singleton();
 	ERR_FAIL_NULL(uniform_set_cache);
 
-	RID default_sampler = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
+	RID default_sampler = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_NEAREST, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
 	RD::Uniform u_source_velocity(RD::UNIFORM_TYPE_SAMPLER_WITH_TEXTURE, 0, Vector<RID>({ default_sampler, p_velocity }));
+	RD::Uniform u_source_depth(RD::UNIFORM_TYPE_SAMPLER_WITH_TEXTURE, 1, Vector<RID>({ default_sampler, p_depth }));
 
 	RD::DrawListID draw_list = RD::get_singleton()->draw_list_begin(p_dest_fb, RD::INITIAL_ACTION_KEEP, RD::FINAL_ACTION_READ, RD::INITIAL_ACTION_DROP, RD::FINAL_ACTION_DISCARD);
 	RD::get_singleton()->draw_list_bind_render_pipeline(draw_list, motion_vectors.pipeline.get_render_pipeline(RD::INVALID_ID, RD::get_singleton()->framebuffer_get_format(p_dest_fb), false, RD::get_singleton()->draw_list_get_current_pass()));
 
-	motion_vectors.push_constant.velocity_resolution[0] = p_velocity_size.width;
-	motion_vectors.push_constant.velocity_resolution[1] = p_velocity_size.height;
+	Projection reprojection = p_previous_projection.flipped_y() * p_previous_transform.affine_inverse() * p_current_transform * p_current_projection.flipped_y().inverse();
+	RendererRD::MaterialStorage::store_camera(reprojection, motion_vectors.push_constant.reprojection_matrix);
+
+	motion_vectors.push_constant.resolution[0] = p_resolution.width;
+	motion_vectors.push_constant.resolution[1] = p_resolution.height;
+	motion_vectors.push_constant.force_derive_from_depth = false;
 
 	RID shader = motion_vectors.shader.version_get_shader(motion_vectors.shader_version, 0);
-	RD::get_singleton()->draw_list_bind_uniform_set(draw_list, uniform_set_cache->get_cache(shader, 0, u_source_velocity), 0);
+	RD::get_singleton()->draw_list_bind_uniform_set(draw_list, uniform_set_cache->get_cache(shader, 0, u_source_velocity, u_source_depth), 0);
+	RD::get_singleton()->draw_list_set_push_constant(draw_list, &motion_vectors.push_constant, sizeof(MotionVectorsPushConstant));
+	RD::get_singleton()->draw_list_draw(draw_list, false, 1u, 3u);
+
+#ifdef DRAW_DERIVATION_FROM_DEPTH_ON_TOP
+	motion_vectors.push_constant.force_derive_from_depth = true;
+
 	RD::get_singleton()->draw_list_set_push_constant(draw_list, &motion_vectors.push_constant, sizeof(MotionVectorsPushConstant));
 	RD::get_singleton()->draw_list_draw(draw_list, false, 1u, 3u);
+#endif
+
 	RD::get_singleton()->draw_list_end();
 }