Use shader storage buffer to pass lights to shader

shaders/glsl/subpasses/composition.frag

@@ -1,50 +1,47 @@
 #version 450
 
-layout (input_attachment_index = 0, binding = 0) uniform subpassInput samplerposition;
-layout (input_attachment_index = 1, binding = 1) uniform subpassInput samplerNormal;
-layout (input_attachment_index = 2, binding = 2) uniform subpassInput samplerAlbedo;
+layout (input_attachment_index = 0, binding = 0) uniform subpassInput inputPosition;
+layout (input_attachment_index = 1, binding = 1) uniform subpassInput inputNormal;
+layout (input_attachment_index = 2, binding = 2) uniform subpassInput inputAlbedo;
 
 layout (location = 0) in vec2 inUV;
 
 layout (location = 0) out vec4 outColor;
 
-layout (constant_id = 0) const int NUM_LIGHTS = 64;
-
 struct Light {
 	vec4 position;
 	vec3 color;
 	float radius;
 };
 
-layout (binding = 3) uniform UBO 
+layout (std140, binding = 3) buffer LightsBuffer 
 {
-	Light lights[NUM_LIGHTS];
-} ubo;
-
+	Light lights[];
+};
 
 void main() 
 {
 	// Read G-Buffer values from previous sub pass
-	vec3 fragPos = subpassLoad(samplerposition).rgb;
-	vec3 normal = subpassLoad(samplerNormal).rgb;
-	vec4 albedo = subpassLoad(samplerAlbedo);
+	vec3 fragPos = subpassLoad(inputPosition).rgb;
+	vec3 normal = subpassLoad(inputNormal).rgb;
+	vec4 albedo = subpassLoad(inputAlbedo);
 	
 	#define ambient 0.05
 	
 	// Ambient part
 	vec3 fragcolor  = albedo.rgb * ambient;
 	
-	for(int i = 0; i < NUM_LIGHTS; ++i)
+	for(int i = 0; i < lights.length(); ++i)
 	{
-		vec3 L = ubo.lights[i].position.xyz - fragPos;
+		vec3 L = lights[i].position.xyz - fragPos;
 		float dist = length(L);
 
 		L = normalize(L);
-		float atten = ubo.lights[i].radius / (pow(dist, 3.0) + 1.0);
+		float atten = lights[i].radius / (pow(dist, 3.0) + 1.0);
 
 		vec3 N = normalize(normal);
 		float NdotL = max(0.0, dot(N, L));
-		vec3 diff = ubo.lights[i].color * albedo.rgb * NdotL * atten;
+		vec3 diff = lights[i].color * albedo.rgb * NdotL * atten;
 
 		fragcolor += diff;
 	}