Pixelate.glsl

#include "Uniforms.glsl"
#include "Samplers.glsl"
#include "Transform.glsl"
#include "ScreenPos.glsl"

varying vec2 vScreenPos;
uniform float rt_w;
uniform float rt_h;
uniform sampler2D sceneTex; 

#ifdef COMPILEPS
uniform float cVXOffset;
uniform float cPixelWidth;
uniform float cPixelHeight;
#endif

void VS()
{
    mat4 modelMatrix = iModelMatrix;
    vec3 worldPos = GetWorldPos(modelMatrix);
    gl_Position = GetClipPos(worldPos);
    vScreenPos = GetScreenPosPreDiv(gl_Position);
}

void PS() 
{ 
  vec2 uv = vScreenPos.xy;
  
  vec3 tc = vec3(1.0, 0.0, 0.0);
  if (uv.x < (cVXOffset-0.005))
  {
    float rt_w = 1.0 / 1366.0;
    float rt_h = 1.0 / 768.0;
    
    float dx = cPixelWidth*(rt_w);
    float dy = cPixelHeight*(rt_h);
    
    vec2 coord = vec2(dx*floor(uv.x/dx),
                      dy*floor(uv.y/dy));
    tc = texture2D(sceneTex, coord).rgb;
  }
  else if (uv.x>=(cVXOffset+0.005))
  {
    tc = texture2D(sceneTex, uv).rgb;
  }
  gl_FragColor = vec4(tc, 1.0);
}