#include <metal_stdlib>
using namespace metal;

struct Params {
	float bias;
};

struct _fs_main_Input {
	float2 uv [[user(locn0)]];
	float2 shadow_uv [[user(locn1)]];
};

struct _fs_main_Output {
	float4 _value [[user(locn0)]];
};

fragment _fs_main_Output fs_main(_fs_main_Input input [[stage_in]],
	constant Params& params [[buffer(0)]],
	texture2d<float> diffuse_tex_tex [[texture(0)]],
	sampler diffuse_tex_samp [[sampler(0)]],
	depth2d<float> shadow_map_tex [[texture(1)]],
	sampler shadow_map_samp [[sampler(1)]]) {
	_fs_main_Output __luma_output;
	float4 mip_color = diffuse_tex_tex.sample(diffuse_tex_samp, input.uv, level(params.bias));
	float shadow = shadow_map_tex.sample_compare(shadow_map_samp, input.shadow_uv, 0.5);
	__luma_output._value = float4((mip_color.rgb * shadow), mip_color.a);
	return __luma_output;
}