[layout(std140)]
struct ViewerData
{
	projectionMatrix: mat4<f32>,
	invProjectionMatrix: mat4<f32>,
	viewMatrix: mat4<f32>,
	invViewMatrix: mat4<f32>,
	viewProjMatrix: mat4<f32>,
	invViewProjMatrix: mat4<f32>,
	renderTargetSize: vec2<f32>,
	invRenderTargetSize: vec2<f32>,
	eyePosition: vec3<f32>
}

[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
{
	[builtin(fragcoord)] fragcoord: vec4<f32>
}

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

struct VertIn
{
	[location(0)] pos: vec2<f32>
}

struct VertOut
{
	[builtin(position)] position: vec4<f32>
}

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

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

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

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

	return output;
}