#version 450
#extension GL_KHR_shader_subgroup_basic : require
#extension GL_KHR_shader_subgroup_ballot : require
#extension GL_KHR_shader_subgroup_vote : require
#extension GL_KHR_shader_subgroup_shuffle : require
#extension GL_KHR_shader_subgroup_shuffle_relative : require
#extension GL_KHR_shader_subgroup_quad : require
layout(local_size_x = 1) in;

layout(std430, binding = 0) buffer SSBO
{
	float FragColor;
};

// Reduced test for functionality exposed on iOS.

void main()
{
	// basic
	FragColor = float(gl_NumSubgroups);
	FragColor = float(gl_SubgroupID);
	FragColor = float(gl_SubgroupSize);
	FragColor = float(gl_SubgroupInvocationID);
	subgroupBarrier();
	subgroupMemoryBarrier();
	subgroupMemoryBarrierBuffer();
	subgroupMemoryBarrierShared();
	subgroupMemoryBarrierImage();
	bool elected = subgroupElect();

	// ballot
	FragColor = float(gl_SubgroupEqMask);
	FragColor = float(gl_SubgroupGeMask);
	FragColor = float(gl_SubgroupGtMask);
	FragColor = float(gl_SubgroupLeMask);
	FragColor = float(gl_SubgroupLtMask);
	vec4 broadcasted = subgroupBroadcast(vec4(10.0), 8u);
	bvec2 broadcasted_bool = subgroupBroadcast(bvec2(true), 8u);
	vec3 first = subgroupBroadcastFirst(vec3(20.0));
	bvec4 first_bool = subgroupBroadcastFirst(bvec4(false));
	uvec4 ballot_value = subgroupBallot(true);
	bool inverse_ballot_value = subgroupInverseBallot(ballot_value);
	bool bit_extracted = subgroupBallotBitExtract(uvec4(10u), 8u);
	uint bit_count = subgroupBallotBitCount(ballot_value);
	uint inclusive_bit_count = subgroupBallotInclusiveBitCount(ballot_value);
	uint exclusive_bit_count = subgroupBallotExclusiveBitCount(ballot_value);
	uint lsb = subgroupBallotFindLSB(ballot_value);
	uint msb = subgroupBallotFindMSB(ballot_value);

	// shuffle
	uint shuffled = subgroupShuffle(10u, 8u);
	bool shuffled_bool = subgroupShuffle(true, 9u);
	uint shuffled_xor = subgroupShuffleXor(30u, 8u);
	bool shuffled_xor_bool = subgroupShuffleXor(false, 9u);

	// shuffle relative 
	uint shuffled_up = subgroupShuffleUp(20u, 4u);
	bool shuffled_up_bool = subgroupShuffleUp(true, 4u);
	uint shuffled_down = subgroupShuffleDown(20u, 4u);
	bool shuffled_down_bool = subgroupShuffleDown(false, 4u);

	// vote
	bool has_all = subgroupAll(true);
	bool has_any = subgroupAny(true);
	bool has_equal = subgroupAllEqual(0);
	has_equal = subgroupAllEqual(true);
	has_equal = subgroupAllEqual(vec3(0.0, 1.0, 2.0));
	has_equal = subgroupAllEqual(bvec4(true, true, false, true));

	// quad
	vec4 swap_horiz = subgroupQuadSwapHorizontal(vec4(20.0));
	bvec4 swap_horiz_bool = subgroupQuadSwapHorizontal(bvec4(true));
	vec4 swap_vertical = subgroupQuadSwapVertical(vec4(20.0));
	bvec4 swap_vertical_bool = subgroupQuadSwapVertical(bvec4(true));
	vec4 swap_diagonal = subgroupQuadSwapDiagonal(vec4(20.0));
	bvec4 swap_diagonal_bool = subgroupQuadSwapDiagonal(bvec4(true));
	vec4 quad_broadcast = subgroupQuadBroadcast(vec4(20.0), 3u);
	bvec4 quad_broadcast_bool = subgroupQuadBroadcast(bvec4(true), 3u);
}