#version 450

layout(push_constant) uniform Push
{
	vec4 SourceSize;
	vec4 OriginalSize;
	vec4 OutputSize;
	uint FrameCount;
} params;

layout(std140, set = 0, binding = 0) uniform UBO
{
	mat4 MVP;
} global;

#pragma stage vertex
layout(location = 0) in vec4 Position;
layout(location = 1) in vec2 TexCoord;
layout(location = 0) out vec2 vTexCoord;

void main()
{
   gl_Position = global.MVP * Position;
   vTexCoord = TexCoord;
}

#pragma stage fragment
layout(location = 0) in vec2 vTexCoord;
layout(location = 0) out vec4 FragColor;
layout(set = 0, binding = 2) uniform sampler2D Source;

#pragma parameter cornersize "Corner Size" 0.030000 0.001000 0.200000 0.005000
#pragma parameter cornersmooth "Corner Smoothness" 1000.0 80.0 2000.0 100.0

const vec2 corner_aspect = vec2(1.0, 0.75);

float corner(vec2 coord)
{
    coord = (coord - vec2(0.5)) + vec2(0.5, 0.5);
    coord = min(coord, vec2(1.0) - coord) * corner_aspect;
    vec2 cdist = vec2(cornersize);
    coord = (cdist - min(coord, cdist));
    float dist = sqrt(dot(coord, coord));
    return clamp((cdist.x - dist) * cornersmooth, 0.0, 1.0);
}

void main()
{
    vec3 res = texture(Source, vTexCoord).rgb;
    res *= corner(vTexCoord);
    FragColor = vec4(res, 1.0);
}