#ifndef LIGHTS_GLSL
#define LIGHTS_GLSL

#extension GL_EXT_buffer_reference : require

#define TYPE_DIRECTIONAL_LIGHT 0
#define TYPE_POINT_LIGHT 1
#define TYPE_SPOT_LIGHT 2

// Forward+ tiling, must match LightCullingPipeline::TILE_SIZE / MAX_LIGHTS_PER_TILE
#define LIGHT_TILE_SIZE 16
#define MAX_LIGHTS_PER_TILE 255
// Every tile stores its light count first, followed by MAX_LIGHTS_PER_TILE light indices
#define LIGHT_TILE_STRIDE (MAX_LIGHTS_PER_TILE + 1)

// Must match GPULight in Light.h
struct Light {
    vec3 position;
    float range;

    vec3 color;
    float intensity;

    // direction the light is pointing in (directional + spot lights)
    vec3 direction;
    uint type;

    float spotInnerCos;
    float spotOuterCos;
    uint castShadows;
    float padding;
};

layout (buffer_reference, std430) readonly buffer LightsBuffer {
    Light data[];
};

layout (buffer_reference, std430) buffer TileLightIndicesBuffer {
    uint data[];
};

#endif // LIGHTS_GLSL