PD Shader ?

//tex0 being normal image, tex1 being dark blurred image used for bloom, tex 2 seeems to be a filter or toon.
//setting r0 to tex0 using tco as uv
  r0 = ImageSampleImplicitLod(tex0, tc0.xy);
  //uesless
  r0.w = r0.w;
  //setting r1 to tex0 using tco as uv
  r1 = float4(ImageSampleImplicitLod(tex1, tc0.xy).xyz.xyz, r1.w);
  //seting r0 to the sum of r0 and r1
  r0 = float4((r0 + r1).xyz.xyz, r0.w);
  //setiing r1 to the first to operands of r1 and tc1 respectivly, tc1 seems to be a buffer
  r1 = float4(r1.xy, tc1.xy.xy);
  //dot of r0 and a buffer value.
  r0.y = float4(Dot(r0.xyz, FragmentConstantsBuffer_213.fc96.xyz)).y;
  //r1 is the first operand of r0 * r1
  r1.x = (r0.yyyy * r1.wwww).x;
  //setting r1 to first operand of r1, x of tex2, z of r1, y of tex2;
  r1 = float4(r1.x, ImageSampleImplicitLod(tex2, r1.x).yw.x, r1.z, ImageSampleImplicitLod(tex2, r1.x).yw.y);
  //setting h2 to w of r1 * z of r1 and getting the x value
  h2.x = (r1.wwww * r1.zzzz).x;
  //setting r1 to x and y of r1, negative y of 40 + z and x of r0 nad getting the operand xy out of them
  r1 = float4(r1.xy, ((-r0.yyyy) + r0.xzxz).zw.xy);
  //setting h0 to x and y of h0, h2 * r1 and getting their x and y operand
  h0 = float4(h0.xy, (h2.xxxx * r1).zw.xy);
  //setting y of h2 to y of r1
  h2.y = r1.y;
  //setting r0 to z and w of h0 + y of r1 and getting the x, y of r0, same as first opperand just with y instead, w of r0
  r0 = float4((h0.zzww + r1.yyyy).xz.x, r0.y, (h0.zzww + r1.yyyy).xz.y, r0.w);
  //h2 set to x of h0, y of h2, y of h0 (really w), w of h2
  h2 = float4(h0.zw.x, h2.y, h0.zw.y, h2.w);
  //set y of r0 to dot of h2 to a buffer of constants, and getting the y operand;
  r0.y = float4(Dot(h2.xyz, FragmentConstantsBuffer_213.fc256.xyz)).y;