#version 300 es
precision mediump float;

#include "color_blind.h"

in  vec2  uv;
out vec4  color;

uniform sampler2D sampler1;
uniform float     scale;
uniform int       cbMode;

void main()
{
  if (scale > 1.0)
  {
    vec2 ts = vec2(textureSize(sampler1, 0));
    vec2 px = (uv - (0.5 / ts)) * ts;
    if (px.x < 0.0 || px.y < 0.0)
      discard;

    color = texelFetch(sampler1, ivec2(px), 0);
  }
  else
    color = texture(sampler1, uv);

  if (cbMode > 0)
    color = cbTransform(color, cbMode);
}