Shadergen: Upload light uniforms

include/PICA/pica_frag_uniforms.hpp

@@ -17,11 +17,12 @@ namespace PICA {
 		alignas(16) vec3 position;
 		alignas(16) vec3 spotlightDirection;
 		
-		float distAttenuationBias;
+		float distanceAttenuationBias;
 		float distanceAttenuationScale;
 	};
 
 	struct FragmentUniforms {
+		using vec3 = std::array<float, 3>;
 		using vec4 = std::array<float, 4>;
 		static constexpr usize tevStageCount = 6;
 
@@ -33,6 +34,8 @@ namespace PICA {
 		alignas(16) vec4 tevBufferColor;
 		alignas(16) vec4 clipCoords;
 
+		// Note: We upload this as a u32 and decode on GPU
+		u32 globalAmbientLight;
 		// NOTE: THIS MUST BE LAST so that if lighting is disabled we can potentially omit uploading it
 		LightUniform lightUniforms[8];
 	};

include/PICA/regs.hpp

@@ -67,9 +67,20 @@ namespace PICA {
 			ColourBufferLoc = 0x11D,
 			FramebufferSize = 0x11E,
 
-
 			// Lighting registers
 			LightingEnable = 0x8F,
+			Light0Specular0 = 0x140,
+			Light0Specular1 = 0x141,
+			Light0Diffuse = 0x142,
+			Light0Ambient = 0x143,
+			Light0XY = 0x144,
+			Light0Z = 0x145,
+			Light0SpotlightXY = 0x146,
+			Light0SpotlightZ = 0x147,
+			Light0AttenuationBias = 0x14A,
+			Light0AttenuationScale = 0x14B,
+
+			LightGlobalAmbient = 0x1C0,
 			LightNumber = 0x1C2,
 			LightConfig0 = 0x1C3,
 			LightConfig1 = 0x1C4,