Add shader uniform hints for screen textures so users can specify custom filter and repeat modes.

At this time, it works best in the Vulkan Renderers as they support using multiple samplers with the same texture.

In GLES3 this feature really only allows you to use the screen texture without mipmaps if you want to save the cost of generating them.

drivers/gles3/rasterizer_canvas_gles3.cpp

@@ -201,6 +201,7 @@ void RasterizerCanvasGLES3::canvas_render_items(RID p_to_render_target, Item *p_
 	bool material_screen_texture_found = false;
 	Rect2 back_buffer_rect;
 	bool backbuffer_copy = false;
+	bool backbuffer_gen_mipmaps = false;
 
 	Item *ci = p_item_list;
 	Item *canvas_group_owner = nullptr;
@@ -225,6 +226,7 @@ void RasterizerCanvasGLES3::canvas_render_items(RID p_to_render_target, Item *p_
 					if (!material_screen_texture_found) {
 						backbuffer_copy = true;
 						back_buffer_rect = Rect2();
+						backbuffer_gen_mipmaps = md->shader_data->uses_screen_texture_mipmaps;
 					}
 				}
 
@@ -282,7 +284,7 @@ void RasterizerCanvasGLES3::canvas_render_items(RID p_to_render_target, Item *p_
 			_render_items(p_to_render_target, item_count, canvas_transform_inverse, p_light_list);
 			item_count = 0;
 
-			texture_storage->render_target_copy_to_back_buffer(p_to_render_target, back_buffer_rect, true);
+			texture_storage->render_target_copy_to_back_buffer(p_to_render_target, back_buffer_rect, backbuffer_gen_mipmaps);
 
 			backbuffer_copy = false;
 			material_screen_texture_found = true; //after a backbuffer copy, screen texture makes no further copies

drivers/gles3/storage/material_storage.cpp

@@ -1083,6 +1083,12 @@ void MaterialData::update_textures(const HashMap<StringName, Variant> &p_paramet
 
 		Vector<RID> textures;
 
+		if (p_texture_uniforms[i].hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				p_texture_uniforms[i].hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				p_texture_uniforms[i].hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+			continue;
+		}
+
 		if (p_texture_uniforms[i].global) {
 			uses_global_textures = true;
 
@@ -1492,9 +1498,9 @@ MaterialStorage::MaterialStorage() {
 		actions.renames["POINT_COORD"] = "gl_PointCoord";
 		actions.renames["INSTANCE_CUSTOM"] = "instance_custom";
 		actions.renames["SCREEN_UV"] = "screen_uv";
-		actions.renames["SCREEN_TEXTURE"] = "color_buffer";
-		actions.renames["DEPTH_TEXTURE"] = "depth_buffer";
-		actions.renames["NORMAL_ROUGHNESS_TEXTURE"] = "normal_roughness_buffer";
+		//actions.renames["SCREEN_TEXTURE"] = "color_buffer"; //Not implemented in 3D yet.
+		//actions.renames["DEPTH_TEXTURE"] = "depth_buffer"; // Not implemented in 3D yet.
+		//actions.renames["NORMAL_ROUGHNESS_TEXTURE"] = "normal_roughness_buffer"; // Not implemented in 3D yet
 		actions.renames["DEPTH"] = "gl_FragDepth";
 		actions.renames["OUTPUT_IS_SRGB"] = "true";
 		actions.renames["FOG"] = "fog";
@@ -2789,6 +2795,7 @@ void CanvasShaderData::set_code(const String &p_code) {
 	ubo_size = 0;
 	uniforms.clear();
 	uses_screen_texture = false;
+	uses_screen_texture_mipmaps = false;
 	uses_sdf = false;
 	uses_time = false;
 
@@ -2799,7 +2806,6 @@ void CanvasShaderData::set_code(const String &p_code) {
 	ShaderCompiler::GeneratedCode gen_code;
 
 	int blend_modei = BLEND_MODE_MIX;
-	uses_screen_texture = false;
 
 	ShaderCompiler::IdentifierActions actions;
 	actions.entry_point_stages["vertex"] = ShaderCompiler::STAGE_VERTEX;
@@ -2826,6 +2832,7 @@ void CanvasShaderData::set_code(const String &p_code) {
 	}
 
 	blend_mode = BlendMode(blend_modei);
+	uses_screen_texture_mipmaps = gen_code.uses_screen_texture_mipmaps;
 
 #if 0
 	print_line("**compiling shader:");
@@ -2833,12 +2840,16 @@ void CanvasShaderData::set_code(const String &p_code) {
 	for (int i = 0; i < gen_code.defines.size(); i++) {
 		print_line(gen_code.defines[i]);
 	}
+
+	HashMap<String, String>::Iterator el = gen_code.code.begin();
+	while (el) {
+		print_line("\n**code " + el->key + ":\n" + el->value);
+		++el;
+	}
+
 	print_line("\n**uniforms:\n" + gen_code.uniforms);
-	print_line("\n**vertex_globals:\n" + gen_code.vertex_global);
-	print_line("\n**vertex_code:\n" + gen_code.vertex);
-	print_line("\n**fragment_globals:\n" + gen_code.fragment_global);
-	print_line("\n**fragment_code:\n" + gen_code.fragment);
-	print_line("\n**light_code:\n" + gen_code.light);
+	print_line("\n**vertex_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_VERTEX]);
+	print_line("\n**fragment_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_FRAGMENT]);
 #endif
 
 	Vector<StringName> texture_uniform_names;
@@ -2877,7 +2888,10 @@ void CanvasShaderData::get_param_list(List<PropertyInfo> *p_param_list) const {
 	HashMap<int, StringName> order;
 
 	for (const KeyValue<StringName, ShaderLanguage::ShaderNode::Uniform> &E : uniforms) {
-		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL) {
+		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
 			continue;
 		}
 		if (E.value.texture_order >= 0) {
@@ -3070,12 +3084,16 @@ void SkyShaderData::set_code(const String &p_code) {
 	for (int i = 0; i < gen_code.defines.size(); i++) {
 		print_line(gen_code.defines[i]);
 	}
+
+	HashMap<String, String>::Iterator el = gen_code.code.begin();
+	while (el) {
+		print_line("\n**code " + el->key + ":\n" + el->value);
+		++el;
+	}
+
 	print_line("\n**uniforms:\n" + gen_code.uniforms);
-	//	print_line("\n**vertex_globals:\n" + gen_code.vertex_global);
-	//	print_line("\n**vertex_code:\n" + gen_code.vertex);
-	print_line("\n**fragment_globals:\n" + gen_code.fragment_global);
-	print_line("\n**fragment_code:\n" + gen_code.fragment);
-	print_line("\n**light_code:\n" + gen_code.light);
+	print_line("\n**vertex_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_VERTEX]);
+	print_line("\n**fragment_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_FRAGMENT]);
 #endif
 
 	Vector<StringName> texture_uniform_names;
@@ -3253,7 +3271,6 @@ void SceneShaderData::set_code(const String &p_code) {
 	valid = false;
 	ubo_size = 0;
 	uniforms.clear();
-	uses_screen_texture = false;
 
 	if (code.is_empty()) {
 		return; //just invalid, but no error
@@ -3378,6 +3395,7 @@ void SceneShaderData::set_code(const String &p_code) {
 	vertex_input_mask |= uses_custom3 << 8;
 	vertex_input_mask |= uses_bones << 9;
 	vertex_input_mask |= uses_weights << 10;
+	uses_screen_texture_mipmaps = gen_code.uses_screen_texture_mipmaps;
 
 #if 0
 	print_line("**compiling shader:");
@@ -3386,11 +3404,10 @@ void SceneShaderData::set_code(const String &p_code) {
 		print_line(gen_code.defines[i]);
 	}
 
-	Map<String, String>::Element *el = gen_code.code.front();
+	HashMap<String, String>::Iterator el = gen_code.code.begin();
 	while (el) {
-		print_line("\n**code " + el->key() + ":\n" + el->value());
-
-		el = el->next();
+		print_line("\n**code " + el->key + ":\n" + el->value);
+		++el;
 	}
 
 	print_line("\n**uniforms:\n" + gen_code.uniforms);
@@ -3439,7 +3456,10 @@ void SceneShaderData::get_param_list(List<PropertyInfo> *p_param_list) const {
 	RBMap<int, StringName> order;
 
 	for (const KeyValue<StringName, ShaderLanguage::ShaderNode::Uniform> &E : uniforms) {
-		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL) {
+		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
 			continue;
 		}
 

drivers/gles3/storage/material_storage.h

@@ -159,6 +159,7 @@ struct CanvasShaderData : public ShaderData {
 	HashMap<StringName, HashMap<int, RID>> default_texture_params;
 
 	bool uses_screen_texture = false;
+	bool uses_screen_texture_mipmaps = false;
 	bool uses_sdf = false;
 	bool uses_time = false;
 
@@ -312,6 +313,7 @@ struct SceneShaderData : public ShaderData {
 	bool uses_sss;
 	bool uses_transmittance;
 	bool uses_screen_texture;
+	bool uses_screen_texture_mipmaps;
 	bool uses_depth_texture;
 	bool uses_normal_texture;
 	bool uses_time;

servers/rendering/renderer_rd/environment/sky.cpp

@@ -114,12 +114,16 @@ void SkyRD::SkyShaderData::set_code(const String &p_code) {
 	for (int i = 0; i < gen_code.defines.size(); i++) {
 		print_line(gen_code.defines[i]);
 	}
+
+	HashMap<String, String>::Iterator el = gen_code.code.begin();
+	while (el) {
+		print_line("\n**code " + el->key + ":\n" + el->value);
+		++el;
+	}
+
 	print_line("\n**uniforms:\n" + gen_code.uniforms);
-	//	print_line("\n**vertex_globals:\n" + gen_code.vertex_global);
-	//	print_line("\n**vertex_code:\n" + gen_code.vertex);
-	print_line("\n**fragment_globals:\n" + gen_code.fragment_global);
-	print_line("\n**fragment_code:\n" + gen_code.fragment);
-	print_line("\n**light_code:\n" + gen_code.light);
+	print_line("\n**vertex_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_VERTEX]);
+	print_line("\n**fragment_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_FRAGMENT]);
 #endif
 
 	scene_singleton->sky.sky_shader.shader.version_set_code(version, gen_code.code, gen_code.uniforms, gen_code.stage_globals[ShaderCompiler::STAGE_VERTEX], gen_code.stage_globals[ShaderCompiler::STAGE_FRAGMENT], gen_code.defines);

servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp

@@ -150,6 +150,7 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
 	depth_draw = DepthDraw(depth_drawi);
 	depth_test = DepthTest(depth_testi);
 	cull_mode = Cull(cull_modei);
+	uses_screen_texture_mipmaps = gen_code.uses_screen_texture_mipmaps;
 
 #if 0
 	print_line("**compiling shader:");
@@ -158,11 +159,10 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
 		print_line(gen_code.defines[i]);
 	}
 
-	RBMap<String, String>::Element *el = gen_code.code.front();
+	HashMap<String, String>::Iterator el = gen_code.code.begin();
 	while (el) {
-		print_line("\n**code " + el->key() + ":\n" + el->value());
-
-		el = el->next();
+		print_line("\n**code " + el->key + ":\n" + el->value);
+		++el;
 	}
 
 	print_line("\n**uniforms:\n" + gen_code.uniforms);
@@ -396,7 +396,11 @@ void SceneShaderForwardClustered::ShaderData::get_param_list(List<PropertyInfo>
 	HashMap<int, StringName> order;
 
 	for (const KeyValue<StringName, ShaderLanguage::ShaderNode::Uniform> &E : uniforms) {
-		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL) {
+		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+			// Don't expose any of these.
 			continue;
 		}
 

servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h

@@ -174,6 +174,7 @@ public:
 		bool uses_time = false;
 		bool writes_modelview_or_projection = false;
 		bool uses_world_coordinates = false;
+		bool uses_screen_texture_mipmaps = false;
 		Cull cull_mode = CULL_DISABLED;
 
 		uint64_t last_pass = 0;

servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp

@@ -158,11 +158,10 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 		print_line(gen_code.defines[i]);
 	}
 
-	RBMap<String, String>::Element * el = gen_code.code.front();
+	HashMap<String, String>::Iterator el = gen_code.code.begin();
 	while (el) {
-		print_line("\n**code " + el->key() + ":\n" + el->value());
-
-		el = el->next();
+		print_line("\n**code " + el->key + ":\n" + el->value);
+		++el;
 	}
 
 	print_line("\n**uniforms:\n" + gen_code.uniforms);
@@ -353,7 +352,10 @@ void SceneShaderForwardMobile::ShaderData::get_param_list(List<PropertyInfo> *p_
 	HashMap<int, StringName> order;
 
 	for (const KeyValue<StringName, ShaderLanguage::ShaderNode::Uniform> &E : uniforms) {
-		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL) {
+		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
 			continue;
 		}
 

servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp

@@ -1361,6 +1361,7 @@ void RendererCanvasRenderRD::canvas_render_items(RID p_to_render_target, Item *p
 	Item *ci = p_item_list;
 	Rect2 back_buffer_rect;
 	bool backbuffer_copy = false;
+	bool backbuffer_gen_mipmaps = false;
 
 	Item *canvas_group_owner = nullptr;
 
@@ -1389,6 +1390,7 @@ void RendererCanvasRenderRD::canvas_render_items(RID p_to_render_target, Item *p
 					if (!material_screen_texture_found) {
 						backbuffer_copy = true;
 						back_buffer_rect = Rect2();
+						backbuffer_gen_mipmaps = md->shader_data->uses_screen_texture_mipmaps;
 					}
 				}
 
@@ -1474,9 +1476,10 @@ void RendererCanvasRenderRD::canvas_render_items(RID p_to_render_target, Item *p
 			_render_items(p_to_render_target, item_count, canvas_transform_inverse, p_light_list);
 			item_count = 0;
 
-			texture_storage->render_target_copy_to_back_buffer(p_to_render_target, back_buffer_rect, true);
+			texture_storage->render_target_copy_to_back_buffer(p_to_render_target, back_buffer_rect, backbuffer_gen_mipmaps);
 
 			backbuffer_copy = false;
+			backbuffer_gen_mipmaps = false;
 			material_screen_texture_found = true; //after a backbuffer copy, screen texture makes no further copies
 		}
 
@@ -1980,6 +1983,7 @@ void RendererCanvasRenderRD::CanvasShaderData::set_code(const String &p_code) {
 	ubo_size = 0;
 	uniforms.clear();
 	uses_screen_texture = false;
+	uses_screen_texture_mipmaps = false;
 	uses_sdf = false;
 	uses_time = false;
 
@@ -1990,7 +1994,6 @@ void RendererCanvasRenderRD::CanvasShaderData::set_code(const String &p_code) {
 	ShaderCompiler::GeneratedCode gen_code;
 
 	int blend_mode = BLEND_MODE_MIX;
-	uses_screen_texture = false;
 
 	ShaderCompiler::IdentifierActions actions;
 	actions.entry_point_stages["vertex"] = ShaderCompiler::STAGE_VERTEX;
@@ -2015,6 +2018,8 @@ void RendererCanvasRenderRD::CanvasShaderData::set_code(const String &p_code) {
 	Error err = canvas_singleton->shader.compiler.compile(RS::SHADER_CANVAS_ITEM, code, &actions, path, gen_code);
 	ERR_FAIL_COND_MSG(err != OK, "Shader compilation failed.");
 
+	uses_screen_texture_mipmaps = gen_code.uses_screen_texture_mipmaps;
+
 	if (version.is_null()) {
 		version = canvas_singleton->shader.canvas_shader.version_create();
 	}
@@ -2025,12 +2030,16 @@ void RendererCanvasRenderRD::CanvasShaderData::set_code(const String &p_code) {
 	for (int i = 0; i < gen_code.defines.size(); i++) {
 		print_line(gen_code.defines[i]);
 	}
+
+	HashMap<String, String>::Iterator el = gen_code.code.begin();
+	while (el) {
+		print_line("\n**code " + el->key + ":\n" + el->value);
+		++el;
+	}
+
 	print_line("\n**uniforms:\n" + gen_code.uniforms);
-	print_line("\n**vertex_globals:\n" + gen_code.vertex_global);
-	print_line("\n**vertex_code:\n" + gen_code.vertex);
-	print_line("\n**fragment_globals:\n" + gen_code.fragment_global);
-	print_line("\n**fragment_code:\n" + gen_code.fragment);
-	print_line("\n**light_code:\n" + gen_code.light);
+	print_line("\n**vertex_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_VERTEX]);
+	print_line("\n**fragment_globals:\n" + gen_code.stage_globals[ShaderCompiler::STAGE_FRAGMENT]);
 #endif
 	canvas_singleton->shader.canvas_shader.version_set_code(version, gen_code.code, gen_code.uniforms, gen_code.stage_globals[ShaderCompiler::STAGE_VERTEX], gen_code.stage_globals[ShaderCompiler::STAGE_FRAGMENT], gen_code.defines);
 	ERR_FAIL_COND(!canvas_singleton->shader.canvas_shader.version_is_valid(version));
@@ -2175,7 +2184,11 @@ void RendererCanvasRenderRD::CanvasShaderData::get_param_list(List<PropertyInfo>
 	HashMap<int, StringName> order;
 
 	for (const KeyValue<StringName, ShaderLanguage::ShaderNode::Uniform> &E : uniforms) {
-		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL) {
+		if (E.value.scope != ShaderLanguage::ShaderNode::Uniform::SCOPE_LOCAL ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+			// Don't expose any of these.
 			continue;
 		}
 		if (E.value.texture_order >= 0) {

servers/rendering/renderer_rd/renderer_canvas_render_rd.h

@@ -174,6 +174,7 @@ class RendererCanvasRenderRD : public RendererCanvasRender {
 		HashMap<StringName, HashMap<int, RID>> default_texture_params;
 
 		bool uses_screen_texture = false;
+		bool uses_screen_texture_mipmaps = false;
 		bool uses_sdf = false;
 		bool uses_time = false;
 

servers/rendering/renderer_rd/storage_rd/material_storage.cpp

@@ -941,6 +941,12 @@ void MaterialStorage::MaterialData::update_uniform_buffer(const HashMap<StringNa
 			continue; //instance uniforms don't appear in the buffer
 		}
 
+		if (E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+			continue;
+		}
+
 		if (E.value.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL) {
 			//this is a global variable, get the index to it
 			GlobalShaderUniforms::Variable *gv = material_storage->global_shader_uniforms.variables.getptr(E.key);
@@ -1052,6 +1058,12 @@ void MaterialStorage::MaterialData::update_textures(const HashMap<StringName, Va
 
 		Vector<RID> textures;
 
+		if (p_texture_uniforms[i].hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+				p_texture_uniforms[i].hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+				p_texture_uniforms[i].hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+			continue;
+		}
+
 		if (p_texture_uniforms[i].global) {
 			uses_global_textures = true;
 
@@ -1307,7 +1319,7 @@ bool MaterialStorage::MaterialData::update_parameters_uniform_set(const HashMap<
 		update_textures(p_parameters, p_default_texture_params, p_texture_uniforms, texture_cache.ptrw(), true);
 	}
 
-	if (p_ubo_size == 0 && p_texture_uniforms.size() == 0) {
+	if (p_ubo_size == 0 && (p_texture_uniforms.size() == 0)) {
 		// This material does not require an uniform set, so don't create it.
 		return false;
 	}

servers/rendering/shader_compiler.cpp

@@ -498,6 +498,11 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
 
 			for (const KeyValue<StringName, SL::ShaderNode::Uniform> &E : pnode->uniforms) {
 				if (SL::is_sampler_type(E.value.type)) {
+					if (E.value.hint == SL::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+							E.value.hint == SL::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+							E.value.hint == SL::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+						continue; // Don't create uniforms in the generated code for these.
+					}
 					max_texture_uniforms++;
 				} else {
 					if (E.value.scope == SL::ShaderNode::Uniform::SCOPE_INSTANCE) {
@@ -537,6 +542,13 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
 					p_actions.uniforms->insert(uniform_name, uniform);
 					continue; // Instances are indexed directly, don't need index uniforms.
 				}
+
+				if (uniform.hint == SL::ShaderNode::Uniform::HINT_SCREEN_TEXTURE ||
+						uniform.hint == SL::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE ||
+						uniform.hint == SL::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+					continue; // Don't create uniforms in the generated code for these.
+				}
+
 				if (SL::is_sampler_type(uniform.type)) {
 					// Texture layouts are different for OpenGL GLSL and Vulkan GLSL
 					if (!RS::get_singleton()->is_low_end()) {
@@ -892,12 +904,39 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
 
 			if (p_default_actions.renames.has(vnode->name)) {
 				code = p_default_actions.renames[vnode->name];
+				if (vnode->name == "SCREEN_TEXTURE") {
+					r_gen_code.uses_screen_texture_mipmaps = true;
+				}
 			} else {
 				if (shader->uniforms.has(vnode->name)) {
 					//its a uniform!
 					const ShaderLanguage::ShaderNode::Uniform &u = shader->uniforms[vnode->name];
 					if (u.texture_order >= 0) {
-						code = _mkid(vnode->name); //texture, use as is
+						StringName name = vnode->name;
+						if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SCREEN_TEXTURE) {
+							name = "SCREEN_TEXTURE";
+							if (u.filter >= ShaderLanguage::FILTER_NEAREST_MIPMAP) {
+								r_gen_code.uses_screen_texture_mipmaps = true;
+							}
+						} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE) {
+							name = "NORMAL_ROUGHNESS_TEXTURE";
+						} else if (u.hint == ShaderLanguage::ShaderNode::Uniform::HINT_DEPTH_TEXTURE) {
+							name = "DEPTH_TEXTURE";
+						} else {
+							name = _mkid(vnode->name); //texture, use as is
+						}
+
+						if (p_default_actions.renames.has(name)) {
+							code = p_default_actions.renames[name];
+						} else {
+							code = name;
+						}
+
+						if (p_actions.usage_flag_pointers.has(name) && !used_flag_pointers.has(name)) {
+							*p_actions.usage_flag_pointers[name] = true;
+							used_flag_pointers.insert(name);
+						}
+
 					} else {
 						//a scalar or vector
 						if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL) {
@@ -1155,6 +1194,7 @@ String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, Gene
 							}
 
 							if (correct_texture_uniform) {
+								//TODO Needs to detect screen_texture hint as well
 								is_screen_texture = (texture_uniform == "SCREEN_TEXTURE");
 
 								String sampler_name;
@@ -1404,6 +1444,7 @@ Error ShaderCompiler::compile(RS::ShaderMode p_mode, const String &p_code, Ident
 	r_gen_code.uses_fragment_time = false;
 	r_gen_code.uses_vertex_time = false;
 	r_gen_code.uses_global_textures = false;
+	r_gen_code.uses_screen_texture_mipmaps = false;
 
 	used_name_defines.clear();
 	used_rmode_defines.clear();

servers/rendering/shader_compiler.h

@@ -80,6 +80,7 @@ public:
 		bool uses_global_textures;
 		bool uses_fragment_time;
 		bool uses_vertex_time;
+		bool uses_screen_texture_mipmaps;
 	};
 
 	struct DefaultIdentifierActions {

servers/rendering/shader_language.cpp

@@ -200,6 +200,9 @@ const char *ShaderLanguage::token_names[TK_MAX] = {
 	"HINT_ANISOTROPY_TEXTURE",
 	"HINT_RANGE",
 	"HINT_INSTANCE_INDEX",
+	"HINT_SCREEN_TEXTURE",
+	"HINT_NORMAL_ROUGHNESS_TEXTURE",
+	"HINT_DEPTH_TEXTURE",
 	"FILTER_NEAREST",
 	"FILTER_LINEAR",
 	"FILTER_NEAREST_MIPMAP",
@@ -363,6 +366,10 @@ const ShaderLanguage::KeyWord ShaderLanguage::keyword_list[] = {
 	{ TK_HINT_ROUGHNESS_A, "hint_roughness_a", CF_UNSPECIFIED, {}, {} },
 	{ TK_HINT_ROUGHNESS_NORMAL_TEXTURE, "hint_roughness_normal", CF_UNSPECIFIED, {}, {} },
 	{ TK_HINT_ROUGHNESS_GRAY, "hint_roughness_gray", CF_UNSPECIFIED, {}, {} },
+	{ TK_HINT_SCREEN_TEXTURE, "hint_screen_texture", CF_UNSPECIFIED, {}, {} },
+	{ TK_HINT_NORMAL_ROUGHNESS_TEXTURE, "hint_normal_roughness_texture", CF_UNSPECIFIED, {}, {} },
+	{ TK_HINT_DEPTH_TEXTURE, "hint_depth_texture", CF_UNSPECIFIED, {}, {} },
+
 	{ TK_FILTER_NEAREST, "filter_nearest", CF_UNSPECIFIED, {}, {} },
 	{ TK_FILTER_LINEAR, "filter_linear", CF_UNSPECIFIED, {}, {} },
 	{ TK_FILTER_NEAREST_MIPMAP, "filter_nearest_mipmap", CF_UNSPECIFIED, {}, {} },
@@ -1096,6 +1103,15 @@ String ShaderLanguage::get_uniform_hint_name(ShaderNode::Uniform::Hint p_hint) {
 		case ShaderNode::Uniform::HINT_ANISOTROPY: {
 			result = "hint_anisotropy";
 		} break;
+		case ShaderNode::Uniform::HINT_SCREEN_TEXTURE: {
+			result = "hint_screen_texture";
+		} break;
+		case ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE: {
+			result = "hint_normal_roughness_texture";
+		} break;
+		case ShaderNode::Uniform::HINT_DEPTH_TEXTURE: {
+			result = "hint_depth_texture";
+		} break;
 		default:
 			break;
 	}
@@ -8563,6 +8579,15 @@ Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_f
 										return ERR_PARSE_ERROR;
 									}
 								} break;
+								case TK_HINT_SCREEN_TEXTURE: {
+									new_hint = ShaderNode::Uniform::HINT_SCREEN_TEXTURE;
+								} break;
+								case TK_HINT_NORMAL_ROUGHNESS_TEXTURE: {
+									new_hint = ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE;
+								} break;
+								case TK_HINT_DEPTH_TEXTURE: {
+									new_hint = ShaderNode::Uniform::HINT_DEPTH_TEXTURE;
+								} break;
 								case TK_FILTER_NEAREST: {
 									new_filter = FILTER_NEAREST;
 								} break;
@@ -8587,6 +8612,7 @@ Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_f
 								case TK_REPEAT_ENABLE: {
 									new_repeat = REPEAT_ENABLE;
 								} break;
+
 								default:
 									break;
 							}
@@ -8611,9 +8637,9 @@ Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_f
 							if (new_filter != FILTER_DEFAULT) {
 								if (uniform.filter != FILTER_DEFAULT) {
 									if (uniform.filter == new_filter) {
-										_set_error(vformat(RTR("Duplicated hint: '%s'."), get_texture_filter_name(new_filter)));
+										_set_error(vformat(RTR("Duplicated filter mode: '%s'."), get_texture_filter_name(new_filter)));
 									} else {
-										_set_error(vformat(RTR("Redefinition of hint: '%s'. The filter mode has already been set to '%s'."), get_texture_filter_name(new_filter), get_texture_filter_name(uniform.filter)));
+										_set_error(vformat(RTR("Redefinition of filter mode: '%s'. The filter mode has already been set to '%s'."), get_texture_filter_name(new_filter), get_texture_filter_name(uniform.filter)));
 									}
 									return ERR_PARSE_ERROR;
 								} else {
@@ -8624,9 +8650,9 @@ Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_f
 							if (new_repeat != REPEAT_DEFAULT) {
 								if (uniform.repeat != REPEAT_DEFAULT) {
 									if (uniform.repeat == new_repeat) {
-										_set_error(vformat(RTR("Duplicated hint: '%s'."), get_texture_repeat_name(new_repeat)));
+										_set_error(vformat(RTR("Duplicated repeat mode: '%s'."), get_texture_repeat_name(new_repeat)));
 									} else {
-										_set_error(vformat(RTR("Redefinition of hint: '%s'. The repeat mode has already been set to '%s'."), get_texture_repeat_name(new_repeat), get_texture_repeat_name(uniform.repeat)));
+										_set_error(vformat(RTR("Redefinition of repeat mode: '%s'. The repeat mode has already been set to '%s'."), get_texture_repeat_name(new_repeat), get_texture_repeat_name(uniform.repeat)));
 									}
 									return ERR_PARSE_ERROR;
 								} else {
@@ -10267,6 +10293,9 @@ Error ShaderLanguage::complete(const String &p_code, const ShaderCompileInfo &p_
 					options.push_back("hint_roughness_gray");
 					options.push_back("hint_roughness_normal");
 					options.push_back("hint_roughness_r");
+					options.push_back("hint_screen_texture");
+					options.push_back("hint_normal_roughness_texture");
+					options.push_back("hint_depth_texture");
 					options.push_back("source_color");
 					options.push_back("repeat_enable");
 					options.push_back("repeat_disable");

servers/rendering/shader_language.h

@@ -176,6 +176,9 @@ public:
 		TK_HINT_SOURCE_COLOR,
 		TK_HINT_RANGE,
 		TK_HINT_INSTANCE_INDEX,
+		TK_HINT_SCREEN_TEXTURE,
+		TK_HINT_NORMAL_ROUGHNESS_TEXTURE,
+		TK_HINT_DEPTH_TEXTURE,
 		TK_FILTER_NEAREST,
 		TK_FILTER_LINEAR,
 		TK_FILTER_NEAREST_MIPMAP,
@@ -667,6 +670,9 @@ public:
 				HINT_DEFAULT_WHITE,
 				HINT_DEFAULT_TRANSPARENT,
 				HINT_ANISOTROPY,
+				HINT_SCREEN_TEXTURE,
+				HINT_NORMAL_ROUGHNESS_TEXTURE,
+				HINT_DEPTH_TEXTURE,
 				HINT_MAX
 			};