Forbid passing multiview sampler to the custom function in shaders

13 files changed, 42 insertions, 20 deletions

diff --git a/servers/rendering/renderer_compositor.cpp b/servers/rendering/renderer_compositor.cpp
index 069b51feaa..a6083fe70d 100644
--- a/servers/rendering/renderer_compositor.cpp
+++ b/servers/rendering/renderer_compositor.cpp
@@ -35,6 +35,8 @@
 #include "core/string/print_string.h"
 #include "servers/xr_server.h"
 
+RendererCompositor *RendererCompositor::singleton = nullptr;
+
 RendererCompositor *(*RendererCompositor::_create_func)() = nullptr;
 bool RendererCompositor::low_end = false;
 
@@ -47,6 +49,8 @@ bool RendererCompositor::is_xr_enabled() const {
 }
 
 RendererCompositor::RendererCompositor() {
+	singleton = this;
+
 	if (XRServer::get_xr_mode() == XRServer::XRMODE_DEFAULT) {
 		xr_enabled = GLOBAL_GET("xr/shaders/enabled");
 	} else {
diff --git a/servers/rendering/renderer_compositor.h b/servers/rendering/renderer_compositor.h
index 9fb79a290b..ff7792741c 100644
--- a/servers/rendering/renderer_compositor.h
+++ b/servers/rendering/renderer_compositor.h
@@ -70,6 +70,7 @@ struct BlitToScreen {
 class RendererCompositor {
 private:
 	bool xr_enabled = false;
+	static RendererCompositor *singleton;
 
 protected:
 	static RendererCompositor *(*_create_func)();
@@ -107,6 +108,7 @@ public:
 	static bool is_low_end() { return low_end; };
 	virtual bool is_xr_enabled() const;
 
+	static RendererCompositor *get_singleton() { return singleton; }
 	RendererCompositor();
 	virtual ~RendererCompositor() {}
 };
diff --git a/servers/rendering/renderer_rd/effects/copy_effects.cpp b/servers/rendering/renderer_rd/effects/copy_effects.cpp
index bcea9225ea..86484c982a 100644
--- a/servers/rendering/renderer_rd/effects/copy_effects.cpp
+++ b/servers/rendering/renderer_rd/effects/copy_effects.cpp
@@ -110,7 +110,7 @@ CopyEffects::CopyEffects(bool p_prefer_raster_effects) {
 
 		copy_to_fb.shader.initialize(copy_modes);
 
-		if (!RendererCompositorRD::singleton->is_xr_enabled()) {
+		if (!RendererCompositorRD::get_singleton()->is_xr_enabled()) {
 			copy_to_fb.shader.set_variant_enabled(COPY_TO_FB_MULTIVIEW, false);
 			copy_to_fb.shader.set_variant_enabled(COPY_TO_FB_MULTIVIEW_WITH_DEPTH, false);
 		}
@@ -266,7 +266,7 @@ CopyEffects::CopyEffects(bool p_prefer_raster_effects) {
 
 		specular_merge.shader.initialize(specular_modes);
 
-		if (!RendererCompositorRD::singleton->is_xr_enabled()) {
+		if (!RendererCompositorRD::get_singleton()->is_xr_enabled()) {
 			specular_merge.shader.set_variant_enabled(SPECULAR_MERGE_ADD_MULTIVIEW, false);
 			specular_merge.shader.set_variant_enabled(SPECULAR_MERGE_SSR_MULTIVIEW, false);
 			specular_merge.shader.set_variant_enabled(SPECULAR_MERGE_ADDITIVE_ADD_MULTIVIEW, false);
diff --git a/servers/rendering/renderer_rd/effects/tone_mapper.cpp b/servers/rendering/renderer_rd/effects/tone_mapper.cpp
index 7b152b524f..821960bb3b 100644
--- a/servers/rendering/renderer_rd/effects/tone_mapper.cpp
+++ b/servers/rendering/renderer_rd/effects/tone_mapper.cpp
@@ -56,7 +56,7 @@ ToneMapper::ToneMapper() {
 
 		tonemap.shader.initialize(tonemap_modes);
 
-		if (!RendererCompositorRD::singleton->is_xr_enabled()) {
+		if (!RendererCompositorRD::get_singleton()->is_xr_enabled()) {
 			tonemap.shader.set_variant_enabled(TONEMAP_MODE_NORMAL_MULTIVIEW, false);
 			tonemap.shader.set_variant_enabled(TONEMAP_MODE_BICUBIC_GLOW_FILTER_MULTIVIEW, false);
 			tonemap.shader.set_variant_enabled(TONEMAP_MODE_1D_LUT_MULTIVIEW, false);
diff --git a/servers/rendering/renderer_rd/effects/vrs.cpp b/servers/rendering/renderer_rd/effects/vrs.cpp
index 4bc5d7b597..6ec8612029 100644
--- a/servers/rendering/renderer_rd/effects/vrs.cpp
+++ b/servers/rendering/renderer_rd/effects/vrs.cpp
@@ -44,7 +44,7 @@ VRS::VRS() {
 
 		vrs_shader.shader.initialize(vrs_modes);
 
-		if (!RendererCompositorRD::singleton->is_xr_enabled()) {
+		if (!RendererCompositorRD::get_singleton()->is_xr_enabled()) {
 			vrs_shader.shader.set_variant_enabled(VRS_MULTIVIEW, false);
 		}
 
diff --git a/servers/rendering/renderer_rd/environment/sky.cpp b/servers/rendering/renderer_rd/environment/sky.cpp
index 7fff349b3c..788ec1cee4 100644
--- a/servers/rendering/renderer_rd/environment/sky.cpp
+++ b/servers/rendering/renderer_rd/environment/sky.cpp
@@ -276,7 +276,7 @@ void SkyRD::ReflectionData::update_reflection_data(int p_size, int p_mipmaps, bo
 	int mipmaps = p_mipmaps;
 	uint32_t w = p_size, h = p_size;
 
-	EffectsRD *effects = RendererCompositorRD::singleton->get_effects();
+	EffectsRD *effects = RendererCompositorRD::get_singleton()->get_effects();
 	ERR_FAIL_NULL_MSG(effects, "Effects haven't been initialized");
 	bool prefer_raster_effects = effects->get_prefer_raster_effects();
 
@@ -756,7 +756,7 @@ void SkyRD::init() {
 
 		sky_shader.shader.initialize(sky_modes, defines);
 
-		if (!RendererCompositorRD::singleton->is_xr_enabled()) {
+		if (!RendererCompositorRD::get_singleton()->is_xr_enabled()) {
 			sky_shader.shader.set_variant_enabled(SKY_VERSION_BACKGROUND_MULTIVIEW, false);
 			sky_shader.shader.set_variant_enabled(SKY_VERSION_HALF_RES_MULTIVIEW, false);
 			sky_shader.shader.set_variant_enabled(SKY_VERSION_QUARTER_RES_MULTIVIEW, false);
diff --git a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
index 3b3979b198..ff180b5465 100644
--- a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
+++ b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
@@ -504,7 +504,7 @@ void SceneShaderForwardClustered::init(const String p_defines) {
 
 		shader.initialize(shader_versions, p_defines);
 
-		if (!RendererCompositorRD::singleton->is_xr_enabled()) {
+		if (!RendererCompositorRD::get_singleton()->is_xr_enabled()) {
 			shader.set_variant_enabled(SHADER_VERSION_DEPTH_PASS_MULTIVIEW, false);
 			shader.set_variant_enabled(SHADER_VERSION_DEPTH_PASS_WITH_NORMAL_AND_ROUGHNESS_MULTIVIEW, false);
 			shader.set_variant_enabled(SHADER_VERSION_DEPTH_PASS_WITH_NORMAL_AND_ROUGHNESS_AND_VOXEL_GI_MULTIVIEW, false);
@@ -730,7 +730,7 @@ void SceneShaderForwardClustered::init(const String p_defines) {
 		actions.global_buffer_array_variable = "global_shader_uniforms.data";
 		actions.instance_uniform_index_variable = "instances.data[instance_index_interp].instance_uniforms_ofs";
 
-		actions.check_multiview_samplers = true; // make sure we check sampling multiview textures
+		actions.check_multiview_samplers = RendererCompositorRD::get_singleton()->is_xr_enabled(); // Make sure we check sampling multiview textures.
 
 		compiler.initialize(actions);
 	}
diff --git a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
index cc4a7dfa47..0e992eb965 100644
--- a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
+++ b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
@@ -421,7 +421,7 @@ void SceneShaderForwardMobile::init(const String p_defines) {
 
 		shader.initialize(shader_versions, p_defines);
 
-		if (!RendererCompositorRD::singleton->is_xr_enabled()) {
+		if (!RendererCompositorRD::get_singleton()->is_xr_enabled()) {
 			shader.set_variant_enabled(SHADER_VERSION_COLOR_PASS_MULTIVIEW, false);
 			shader.set_variant_enabled(SHADER_VERSION_LIGHTMAP_COLOR_PASS_MULTIVIEW, false);
 			shader.set_variant_enabled(SHADER_VERSION_SHADOW_PASS_MULTIVIEW, false);
@@ -610,7 +610,7 @@ void SceneShaderForwardMobile::init(const String p_defines) {
 		actions.instance_uniform_index_variable = "draw_call.instance_uniforms_ofs";
 
 		actions.apply_luminance_multiplier = true; // apply luminance multiplier to screen texture
-		actions.check_multiview_samplers = true; // make sure we check sampling multiview textures
+		actions.check_multiview_samplers = RendererCompositorRD::get_singleton()->is_xr_enabled(); // Make sure we check sampling multiview textures.
 
 		compiler.initialize(actions);
 	}
diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
index f102bc0650..e21695205b 100644
--- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
@@ -919,7 +919,7 @@ void RendererCanvasRenderRD::_render_item(RD::DrawListID p_draw_list, RID p_rend
 			} break;
 			case Item::Command::TYPE_ANIMATION_SLICE: {
 				const Item::CommandAnimationSlice *as = static_cast<const Item::CommandAnimationSlice *>(c);
-				double current_time = RendererCompositorRD::singleton->get_total_time();
+				double current_time = RendererCompositorRD::get_singleton()->get_total_time();
 				double local_time = Math::fposmod(current_time - as->offset, as->animation_length);
 				skipping = !(local_time >= as->slice_begin && local_time < as->slice_end);
 
diff --git a/servers/rendering/renderer_rd/renderer_compositor_rd.h b/servers/rendering/renderer_rd/renderer_compositor_rd.h
index 43c8d78dee..eae4327908 100644
--- a/servers/rendering/renderer_rd/renderer_compositor_rd.h
+++ b/servers/rendering/renderer_rd/renderer_compositor_rd.h
@@ -101,6 +101,7 @@ protected:
 	double delta = 0.0;
 
 	static uint64_t frame;
+	static RendererCompositorRD *singleton;
 
 public:
 	RendererUtilities *get_utilities() { return utilities; };
@@ -145,7 +146,7 @@ public:
 		low_end = false;
 	}
 
-	static RendererCompositorRD *singleton;
+	static RendererCompositorRD *get_singleton() { return singleton; }
 	RendererCompositorRD();
 	~RendererCompositorRD();
 };
diff --git a/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp b/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
index 00fb8acca8..3ed5d7dda8 100644
--- a/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/particles_storage.cpp
@@ -774,7 +774,7 @@ void ParticlesStorage::_particles_process(Particles *p_particles, double p_delta
 
 	p_particles->phase = new_phase;
 
-	frame_params.time = RendererCompositorRD::singleton->get_total_time();
+	frame_params.time = RendererCompositorRD::get_singleton()->get_total_time();
 	frame_params.delta = p_delta * p_particles->speed_scale;
 	frame_params.random_seed = p_particles->random_seed;
 	frame_params.explosiveness = p_particles->explosiveness;
@@ -1228,7 +1228,7 @@ void ParticlesStorage::particles_set_view_axis(RID p_particles, const Vector3 &p
 		RD::get_singleton()->compute_list_dispatch_threads(compute_list, particles->amount, 1, 1);
 
 		RD::get_singleton()->compute_list_end();
-		RendererCompositorRD::singleton->get_effects()->sort_buffer(particles->particles_sort_uniform_set, particles->amount);
+		RendererCompositorRD::get_singleton()->get_effects()->sort_buffer(particles->particles_sort_uniform_set, particles->amount);
 	}
 
 	if (particles->trails_enabled && particles->trail_bind_poses.size() > 1) {
@@ -1341,7 +1341,7 @@ void ParticlesStorage::update_particles() {
 			particles->inactive = false;
 			particles->inactive_time = 0;
 		} else {
-			particles->inactive_time += particles->speed_scale * RendererCompositorRD::singleton->get_frame_delta_time();
+			particles->inactive_time += particles->speed_scale * RendererCompositorRD::get_singleton()->get_frame_delta_time();
 			if (particles->inactive_time > particles->lifetime * 1.2) {
 				particles->inactive = true;
 				continue;
@@ -1442,7 +1442,7 @@ void ParticlesStorage::update_particles() {
 				frame_time = 1.0 / fixed_fps;
 				decr = frame_time;
 			}
-			double delta = RendererCompositorRD::singleton->get_frame_delta_time();
+			double delta = RendererCompositorRD::get_singleton()->get_frame_delta_time();
 			if (delta > 0.1) { //avoid recursive stalls if fps goes below 10
 				delta = 0.1;
 			} else if (delta <= 0.0) { //unlikely but..
@@ -1461,7 +1461,7 @@ void ParticlesStorage::update_particles() {
 			if (zero_time_scale) {
 				_particles_process(particles, 0.0);
 			} else {
-				_particles_process(particles, RendererCompositorRD::singleton->get_frame_delta_time());
+				_particles_process(particles, RendererCompositorRD::get_singleton()->get_frame_delta_time());
 			}
 		}
 
diff --git a/servers/rendering/shader_language.cpp b/servers/rendering/shader_language.cpp
index 940363a7e8..958e960ab2 100644
--- a/servers/rendering/shader_language.cpp
+++ b/servers/rendering/shader_language.cpp
@@ -33,6 +33,7 @@
 #include "core/os/os.h"
 #include "core/string/print_string.h"
 #include "core/templates/local_vector.h"
+#include "servers/rendering/renderer_compositor.h"
 #include "servers/rendering_server.h"
 #include "shader_types.h"
 
@@ -3055,7 +3056,7 @@ const ShaderLanguage::BuiltinFuncConstArgs ShaderLanguage::builtin_func_const_ar
 
 bool ShaderLanguage::is_const_suffix_lut_initialized = false;
 
-bool ShaderLanguage::_validate_function_call(BlockNode *p_block, const FunctionInfo &p_function_info, OperatorNode *p_func, DataType *r_ret_type, StringName *r_ret_type_str) {
+bool ShaderLanguage::_validate_function_call(BlockNode *p_block, const FunctionInfo &p_function_info, OperatorNode *p_func, DataType *r_ret_type, StringName *r_ret_type_str, bool *r_is_custom_function) {
 	ERR_FAIL_COND_V(p_func->op != OP_CALL && p_func->op != OP_CONSTRUCT, false);
 
 	Vector<DataType> args;
@@ -3479,6 +3480,9 @@ bool ShaderLanguage::_validate_function_call(BlockNode *p_block, const FunctionI
 				}
 			}
 
+			if (r_is_custom_function) {
+				*r_is_custom_function = true;
+			}
 			return true;
 		}
 	}
@@ -5251,7 +5255,8 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
 						return nullptr;
 					}
 
-					if (!_validate_function_call(p_block, p_function_info, func, &func->return_cache, &func->struct_name)) {
+					bool is_custom_func = false;
+					if (!_validate_function_call(p_block, p_function_info, func, &func->return_cache, &func->struct_name, &is_custom_func)) {
 						_set_error(vformat(RTR("No matching function found for: '%s'."), String(funcname->name)));
 						return nullptr;
 					}
@@ -5391,6 +5396,16 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
 											//being sampler, this either comes from a uniform
 											ShaderNode::Uniform *u = &shader->uniforms[varname];
 											ERR_CONTINUE(u->type != call_function->arguments[i].type); //this should have been validated previously
+
+											if (RendererCompositor::get_singleton()->is_xr_enabled() && is_custom_func) {
+												ShaderNode::Uniform::Hint hint = u->hint;
+
+												if (hint == ShaderNode::Uniform::HINT_DEPTH_TEXTURE || hint == ShaderNode::Uniform::HINT_SCREEN_TEXTURE || hint == ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE) {
+													_set_error(vformat(RTR("Unable to pass a multiview texture sampler as a parameter to custom function. Consider to sample it in the main function and then pass the vector result to it."), get_uniform_hint_name(hint)));
+													return nullptr;
+												}
+											}
+
 											//propagate
 											if (!_propagate_function_call_sampler_uniform_settings(name, i, u->filter, u->repeat)) {
 												return nullptr;
diff --git a/servers/rendering/shader_language.h b/servers/rendering/shader_language.h
index aea61e42c3..220160e5fd 100644
--- a/servers/rendering/shader_language.h
+++ b/servers/rendering/shader_language.h
@@ -1088,7 +1088,7 @@ private:
 	bool _compare_datatypes(DataType p_datatype_a, String p_datatype_name_a, int p_array_size_a, DataType p_datatype_b, String p_datatype_name_b, int p_array_size_b);
 	bool _compare_datatypes_in_nodes(Node *a, Node *b);
 
-	bool _validate_function_call(BlockNode *p_block, const FunctionInfo &p_function_info, OperatorNode *p_func, DataType *r_ret_type, StringName *r_ret_type_str);
+	bool _validate_function_call(BlockNode *p_block, const FunctionInfo &p_function_info, OperatorNode *p_func, DataType *r_ret_type, StringName *r_ret_type_str, bool *r_is_custom_function = nullptr);
 	bool _parse_function_arguments(BlockNode *p_block, const FunctionInfo &p_function_info, OperatorNode *p_func, int *r_complete_arg = nullptr);
 	bool _propagate_function_call_sampler_uniform_settings(StringName p_name, int p_argument, TextureFilter p_filter, TextureRepeat p_repeat);
 	bool _propagate_function_call_sampler_builtin_reference(StringName p_name, int p_argument, const StringName &p_builtin);