out vec4 FragColor;

in vec2 tex_coord;

uniform vec2 size;
uniform sampler2D tex;
uniform bool use_tex;
uniform float border;
uniform vec4 fill_t;
uniform vec4 fill_b;
uniform vec4 border_t;
uniform vec4 border_b;

void main() {
	vec2 tex_pos = tex_coord * size;
	if(tex_pos.x < border || tex_pos.x > (size.x - border) || tex_pos.y < border || tex_pos.y > (size.y - border))
		FragColor = mix(border_t, border_b, tex_coord.y);
	else
		FragColor = (use_tex ? texture(tex, (tex_coord - (border / size)) * (size / (size - (border * 2.0)))) : vec4(1.0)) * mix(fill_t, fill_b, tex_coord.y);
}