// Copyright (C) 2009-2022, Panagiotis Christopoulos Charitos and contributors.
// All rights reserved.
// Code licensed under the BSD License.
// http://www.anki3d.org/LICENSE

#pragma anki mutator LAYER_GROUP 0 1 2

#pragma anki start vert
#include <AnKi/Shaders/QuadVert.glsl>
#pragma anki end

#pragma anki start frag
#include <AnKi/Shaders/RtShadows.glsl>

layout(set = 0, binding = 0) uniform utexture2D u_inTex;
layout(set = 0, binding = 1) uniform sampler u_nearestAnyClampSampler;

layout(location = 0) in Vec2 in_uv;
layout(location = 0) out Vec3 out_color;

void main()
{
	const UVec4 packed = textureLod(u_inTex, u_nearestAnyClampSampler, in_uv, 0.0);
	F32 shadowFactors[MAX_RT_SHADOW_LAYERS];
	unpackRtShadows(packed, shadowFactors);

#if LAYER_GROUP == 0
	out_color = Vec3(shadowFactors[0], shadowFactors[1], shadowFactors[2]);
#elif LAYER_GROUP == 1
	out_color = Vec3(shadowFactors[3], shadowFactors[4], shadowFactors[5]);
#else
	out_color = Vec3(shadowFactors[6], shadowFactors[7], 0.0);
#endif
}
#pragma anki end