Pixelate effect for OBS Study (obs-shaderfilter plugin)

pixelate.shader

//-----------------------------------------------------------------------------------------
// Shader constant register mappings (scalars - float, double, Point, Color, Point3D, etc.)
//-----------------------------------------------------------------------------------------

uniform float horizontal_pixel_counts;
uniform float vertical_pixel_counts;
uniform float speed;

//--------------------------------------------------------------------------------------
// Sampler Inputs (Brushes, including ImplicitInput)
//--------------------------------------------------------------------------------------

//--------------------------------------------------------------------------------------
// Pixel Shader
//--------------------------------------------------------------------------------------

//float4 main(float2 uv : TEXCOORD) : COLOR
float4 mainImage(VertData v_in) : TARGET
{
  float2 brickCounts = { horizontal_pixel_counts, vertical_pixel_counts };
  float2 brickSize = 1.0 / brickCounts;

  // Offset every other row of bricks
  float2 offsetuv = v_in.uv;
  float t = elapsed_time * speed;
  float time_offset = sin(t);

  float2 brickNum = floor(offsetuv / brickSize);
  float2 centerOfBrickA = (brickNum + (0.5 + time_offset) / 2.5) * brickSize + brickSize / 2;
  float2 centerOfBrickB = (brickNum + (0.5 + time_offset) / 2.5) * brickSize + brickSize / 2;
  float4 colorA = image.Sample(textureSampler, centerOfBrickA);
  float4 colorB = image.Sample(textureSampler, centerOfBrickA);
  

  return float4(
        lerp(colorA.r, colorB.r, time_offset), 
        lerp(colorA.g, colorB.g, time_offset), 
        lerp(colorA.b, colorB.b, time_offset), 
        lerp(colorA.a, colorB.a, time_offset)
  );
}