shaders

// vertex
#version 420

in vec2 pos;
in vec2 texcoord;

out vec2 tex_coord;

void main()
{
    gl_Position = vec4(pos, 0.0, 1.0);
    tex_coord = texcoord;
}

// fragment
#version 420

in vec2 tex_coord;
out vec4 color;

uniform sampler2D tex;

void main()
{
    color = texture(tex, tex_coord);
}