#include "/include/global.glsl"
#include "/include/utility/encoding.glsl"

layout(location = 0) out vec4 gbuffer_data_0;

void voxy_emitFragment(VoxyFragmentParameters parameters) {
    // Get base properties

    vec3 base_color = parameters.sampledColour.rgb * parameters.tinting.rgb;

    // from Cortex
    vec3 normal = vec3(
                      uint((parameters.face >> 1) == 2),
                      uint((parameters.face >> 1) == 0),
                      uint((parameters.face >> 1) == 1)
                  ) *
        (float(int(parameters.face) & 1) * 2.0 - 1.0);

    uint material_mask = max(parameters.customId - 10000u, 0u);

    // Encode gbuffer data

    gbuffer_data_0.x = pack_unorm_2x8(base_color.rg);
    gbuffer_data_0.y = pack_unorm_2x8(
        base_color.b,
        clamp01(float(material_mask) * rcp(255.0))
    );
    gbuffer_data_0.z = pack_unorm_2x8(encode_unit_vector(normal));
    gbuffer_data_0.w = pack_unorm_2x8(parameters.lightMap);
}