// Copyright 2021, Collabora Ltd.
// Author: Jakob Bornecrantz <jakob@collabora.com>
// SPDX-License-Identifier: BSL-1.0

#version 460


layout(local_size_x = 8, local_size_y = 8, local_size_z = 1) in;

layout(set = 0, binding = 2) uniform writeonly restrict image2D target;
layout(set = 0, binding = 3) uniform restrict Config
{
	ivec4 views[2];
	vec4 pre_transform[2];
	vec4 post_transform[2];
	mat4 transform[2];
} data;


void main()
{
	uint ix = gl_GlobalInvocationID.x;
	uint iy = gl_GlobalInvocationID.y;
	uint iz = gl_GlobalInvocationID.z;

	ivec2 offset = ivec2(data.views[iz].xy);
	ivec2 extent = ivec2(data.views[iz].zw);

	if (ix >= extent.x || iy >= extent.y) {
		return;
	}

	vec4 colour = vec4(vec3(0.2), 1.0);

	imageStore(target, ivec2(offset.x + ix, offset.y + iy), colour);
}