Merge pull request #98614 from DarioSamo/soft-shadow-samples-fix

Fix soft shadows by increasing the bit count for specialization constants.

servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h

@@ -108,10 +108,10 @@ public:
 				uint32_t projector_use_mipmaps : 1;
 				uint32_t use_depth_fog : 1;
 				uint32_t use_lightmap_bicubic_filter : 1;
-				uint32_t soft_shadow_samples : 4;
-				uint32_t penumbra_shadow_samples : 4;
-				uint32_t directional_soft_shadow_samples : 4;
-				uint32_t directional_penumbra_shadow_samples : 4;
+				uint32_t soft_shadow_samples : 6;
+				uint32_t penumbra_shadow_samples : 6;
+				uint32_t directional_soft_shadow_samples : 6;
+				uint32_t directional_penumbra_shadow_samples : 6;
 			};
 
 			uint32_t packed_0;

servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp

@@ -322,7 +322,12 @@ void SceneShaderForwardMobile::ShaderData::_create_pipeline(PipelineKey p_pipeli
 	specialization_constants.push_back(sc);
 
 	sc.constant_id = 1;
-	sc.float_value = p_pipeline_key.shader_specialization.packed_1;
+	sc.int_value = p_pipeline_key.shader_specialization.packed_1;
+	sc.type = RD::PIPELINE_SPECIALIZATION_CONSTANT_TYPE_INT;
+	specialization_constants.push_back(sc);
+
+	sc.constant_id = 2;
+	sc.float_value = p_pipeline_key.shader_specialization.packed_2;
 	sc.type = RD::PIPELINE_SPECIALIZATION_CONSTANT_TYPE_FLOAT;
 	specialization_constants.push_back(sc);
 

servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.h

@@ -74,22 +74,23 @@ public:
 				uint32_t use_depth_fog : 1;
 				uint32_t is_multimesh : 1;
 				uint32_t use_lightmap_bicubic_filter : 1;
-				uint32_t pad : 2;
-				uint32_t soft_shadow_samples : 4;
-				uint32_t penumbra_shadow_samples : 4;
-				uint32_t directional_soft_shadow_samples : 4;
-				uint32_t directional_penumbra_shadow_samples : 4;
+				uint32_t soft_shadow_samples : 6;
+				uint32_t penumbra_shadow_samples : 6;
+				uint32_t directional_soft_shadow_samples : 6;
 			};
 
 			uint32_t packed_0;
 		};
 
 		union {
-			float luminance_multiplier;
-			float packed_1;
+			uint32_t directional_penumbra_shadow_samples : 6;
+			uint32_t packed_1;
 		};
 
-		uint32_t packed_2;
+		union {
+			float luminance_multiplier;
+			float packed_2;
+		};
 	};
 
 	struct UbershaderConstants {

servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered_inc.glsl

@@ -107,19 +107,19 @@ bool sc_use_lightmap_bicubic_filter() {
 }
 
 uint sc_soft_shadow_samples() {
-	return (sc_packed_0() >> 8) & 15U;
+	return (sc_packed_0() >> 8) & 63U;
 }
 
 uint sc_penumbra_shadow_samples() {
-	return (sc_packed_0() >> 12) & 15U;
+	return (sc_packed_0() >> 14) & 63U;
 }
 
 uint sc_directional_soft_shadow_samples() {
-	return (sc_packed_0() >> 16) & 15U;
+	return (sc_packed_0() >> 20) & 63U;
 }
 
 uint sc_directional_penumbra_shadow_samples() {
-	return (sc_packed_0() >> 20) & 15U;
+	return (sc_packed_0() >> 26) & 63U;
 }
 
 float sc_luminance_multiplier() {

servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile_inc.glsl

@@ -22,8 +22,8 @@ layout(push_constant, std430) uniform DrawCall {
 	uint pad;
 #ifdef UBERSHADER
 	uint sc_packed_0;
-	float sc_packed_1;
-	uint sc_packed_2;
+	uint sc_packed_1;
+	float sc_packed_2;
 	uint uc_packed_0;
 #endif
 }
@@ -42,10 +42,14 @@ uint sc_packed_0() {
 	return draw_call.sc_packed_0;
 }
 
-float sc_packed_1() {
+uint sc_packed_1() {
 	return draw_call.sc_packed_1;
 }
 
+float sc_packed_2() {
+	return draw_call.sc_packed_2;
+}
+
 uint uc_cull_mode() {
 	return (draw_call.uc_packed_0 >> 0) & 3U;
 }
@@ -54,16 +58,21 @@ uint uc_cull_mode() {
 
 // Pull the constants from the pipeline's specialization constants.
 layout(constant_id = 0) const uint pso_sc_packed_0 = 0;
-layout(constant_id = 1) const float pso_sc_packed_1 = 2.0;
+layout(constant_id = 1) const uint pso_sc_packed_1 = 0;
+layout(constant_id = 2) const float pso_sc_packed_2 = 2.0;
 
 uint sc_packed_0() {
 	return pso_sc_packed_0;
 }
 
-float sc_packed_1() {
+uint sc_packed_1() {
 	return pso_sc_packed_1;
 }
 
+float sc_packed_2() {
+	return pso_sc_packed_2;
+}
+
 #endif
 
 bool sc_use_light_projector() {
@@ -123,23 +132,23 @@ bool sc_use_lightmap_bicubic_filter() {
 }
 
 uint sc_soft_shadow_samples() {
-	return (sc_packed_0() >> 16) & 15U;
+	return (sc_packed_0() >> 14) & 63U;
 }
 
 uint sc_penumbra_shadow_samples() {
-	return (sc_packed_0() >> 20) & 15U;
+	return (sc_packed_0() >> 20) & 63U;
 }
 
 uint sc_directional_soft_shadow_samples() {
-	return (sc_packed_0() >> 24) & 15U;
+	return (sc_packed_0() >> 26) & 63U;
 }
 
 uint sc_directional_penumbra_shadow_samples() {
-	return (sc_packed_0() >> 28) & 15U;
+	return (sc_packed_1() >> 0) & 63U;
 }
 
 float sc_luminance_multiplier() {
-	return sc_packed_1();
+	return sc_packed_2();
 }
 
 /* Set 0: Base Pass (never changes) */