rastafont8x8cs.hlsl

Texture2D<uint> input : register( t0 );
RWTexture2D<float4> output : register( u0 );

static const uint rastafont8x8_bitmap[] =
{
	0x00000000,0x00000000,0x0c1e1e0c,0x000c000c,0x00363636,0x00000000,0x367f3636,0x0036367f,
	0x1e033e0c,0x000c1f30,0x18336300,0x0063660c,0x6e1c361c,0x006e333b,0x00030606,0x00000000,
	0x06060c18,0x00180c06,0x18180c06,0x00060c18,0xff3c6600,0x0000663c,0x3f0c0c00,0x00000c0c,
	0x00000000,0x060c0e00,0x3f000000,0x00000000,0x00000000,0x000c0c00,0x0c183060,0x00010306,
	0x3f3b331e,0x001e3337,0x0c0c0f0c,0x003f0c0c,0x1c30331e,0x003f3306,0x1c30331e,0x001e3330,
	0x33363c38,0x0030307f,0x301f033f,0x001e3330,0x1f03061c,0x001e3333,0x1830333f,0x0006060c,
	0x1e33331e,0x001e3333,0x3e33331e,0x000e1830,0x0c0c0000,0x000c0c00,0x0c0c0000,0x060c0e00,
	0x03060c18,0x00180c06,0x003f0000,0x0000003f,0x30180c06,0x00060c18,0x1830331e,0x000c000c,
	0x7b7b633e,0x001e037b,0x33331e0c,0x0033333f,0x3e66663f,0x003f6666,0x0303663c,0x003c6603,
	0x6666363f,0x003f3666,0x1e16467f,0x007f4616,0x1e16467f,0x000f0616,0x0303663c,0x007c6673,
	0x3f333333,0x00333333,0x0c0c0c1e,0x001e0c0c,0x30303078,0x001e3333,0x1e366667,0x00676636,
	0x0606060f,0x007f6646,0x6b7f7763,0x00636363,0x7b6f6763,0x00636373,0x6363361c,0x001c3663,
	0x3e66663f,0x000f0606,0x3333331e,0x00381e3b,0x3e66663f,0x0067361e,0x1c07331e,0x001e3338,
	0x0c0c2d3f,0x001e0c0c,0x33333333,0x003f3333,0x33333333,0x000c1e33,0x6b636363,0x0063777f,
	0x1c366363,0x00636336,0x1e333333,0x001e0c0c,0x0c19337f,0x007f6346,0x0606061e,0x001e0606,
	0x180c0603,0x00406030,0x1818181e,0x001e1818,0x63361c08,0x00000000,0x00000000,0xff000000,
	0x00180c0c,0x00000000,0x301e0000,0x006e333e,0x663e0607,0x003d6666,0x331e0000,0x001e3303,
	0x3e303038,0x006e3333,0x331e0000,0x001e033f,0x0f06361c,0x000f0606,0x336e0000,0x1f303e33,
	0x6e360607,0x00676666,0x0c0e000c,0x001e0c0c,0x181e0018,0x0e1b1818,0x36660607,0x0067361e,
	0x0c0c0c0e,0x001e0c0c,0x7f370000,0x0063636b,0x331f0000,0x00333333,0x331e0000,0x001e3333,
	0x663b0000,0x0f063e66,0x336e0000,0x78303e33,0x361b0000,0x000f0636,0x033e0000,0x001f301e,
	0x0c3e0c08,0x00182c0c,0x33330000,0x006e3333,0x33330000,0x000c1e33,0x63630000,0x00367f6b,
	0x36630000,0x0063361c,0x33330000,0x1f303e33,0x193f0000,0x003f260c,0x070c0c38,0x00380c0c,
	0x00181818,0x00181818,0x380c0c07,0x00070c0c,0x00003b6e,0x00000000,
};

[numthreads(8, 8, 1)]
void main(const uint3 dtid : SV_DispatchThreadID, const uint3 gtid : SV_GroupThreadID, const uint3 gid : SV_GroupID)
{
	uint i = input[gid.xy].r - ' ';
	uint m = rastafont8x8_bitmap[i*2 + gtid.y/4];
	if( m & (1<<((gtid.y*8 + gtid.x)&31)) )
	{
		output[dtid.xy] = 1;
	}	
}

What's the input supposed to be?