#version 330 core
out vec4 FragColor;

in vec3 ourColor;
in vec2 TexCoord;

// texture sampler
uniform sampler2D background;
uniform sampler2D human;

vec4 bgr2rgb(vec4 color)
{
	return vec4(color.b, color.g, color.r, color.a);
}

void main()
{
	vec2 flippedTexCoords = vec2(TexCoord.x, 1.0 - TexCoord.y);
	vec4 humanColor = texture(human, flippedTexCoords);
	humanColor = bgr2rgb(humanColor);
	vec4 backgroundColor = texture(background, flippedTexCoords);
	FragColor = mix(backgroundColor, humanColor, humanColor.a);
}