[nzsl_version("1.0")]
module;

import Engine.ViewerData;

[layout(std140)]
struct BlurData
{
	direction: vec2[f32],
	sizeFactor: f32
}

external
{
	[set(0), binding(0)] viewerData: uniform[ViewerData],
	[set(0), binding(1)] colorTexture: sampler2D[f32],
	[set(0), binding(2)] blurData: uniform[BlurData]
}

struct FragIn
{
	[location(0)] uv: vec2[f32]
}

struct FragOut
{
	[location(0)] color: vec4[f32]
}

struct VertIn
{
	[location(0)] pos: vec2[f32],
	[location(1)] uv: vec2[f32],
}

struct VertOut
{
	[location(0)] uv: vec2[f32],
	[builtin(position)] position: vec4[f32]
}

[entry(frag)]
fn main(input: FragIn) -> FragOut
{
	let invTargetSize = viewerData.invRenderTargetSize * blurData.sizeFactor;

	let color = colorTexture.Sample(input.uv).rgb * 0.2270270270;

	color += colorTexture.Sample(input.uv + blurData.direction * 1.3846153846 * invTargetSize).rgb * 0.3162162162;
	color += colorTexture.Sample(input.uv - blurData.direction * 1.3846153846 * invTargetSize).rgb * 0.3162162162;

	color += colorTexture.Sample(input.uv + blurData.direction * 3.2307692308 * invTargetSize).rgb * 0.0702702703;
	color += colorTexture.Sample(input.uv - blurData.direction * 3.2307692308 * invTargetSize).rgb * 0.0702702703;

	let output: FragOut;
	output.color = vec4[f32](color, 1.0);

	return output;
}

[entry(vert)]
fn main(input: VertIn) -> VertOut
{
	let output: VertOut;
	output.position = vec4[f32](input.pos, 0.0, 1.0);
	output.uv = input.uv;

	return output;
}