repeat.glsl

#START_VERTEX
#version 140

/**
-------------- texture coords vertex shader -------------

    author: Richman Stewart

    simple vertex shader that sets the position
    to the specified matrix and position while
    passing the vertex colour and tex coords
    to the fragment shader

**/

in vec2 a_position;
in vec2 a_tex_coord;
in vec4 a_colour;

uniform mat4 matrix;

out vec4 v_colour;
out vec2 tex_coord;

void main() {
   v_colour = a_colour;
   tex_coord = a_tex_coord;
   gl_Position = matrix * vec4(a_position, 0, 1);
}

#END_VERTEX

#START_FRAGMENT
#version 140

/**
------------ texture repeat fragment shader ------------

    author: Richman Stewart

    repeats the original texture x, y amount of times

---------------------- use -----------------------------

    repeat - the amount of times to repeat
    the texture horizontally and vertically

**/

in vec4 v_colour;
in vec2 tex_coords;
out vec4 pixel;

uniform sampler2D t0;
uniform vec2 repeat = vec2(2, 2);

void main() {
    pixel = v_colour * texture2D(t0, vec2(mod(tex_coords.x * repeat.x, 1), mod(tex_coords.y * repeat.y, 1)));
}

#END_FRAGMENT