// Copyright (c) 2017-2020 Xiamen Yaji Software Co., Ltd.

CCEffect %{
  techniques:
  - passes:
    - vert: post-process-vs
      frag: post-process-fs
      pass: post-process
      depthStencilState:
        depthTest: false
        depthWrite: false
      rasterizerState:
        cullMode: none
      blendState:
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one_minus_src_alpha
          blendSrcAlpha: src_alpha
          blendDstAlpha: one_minus_src_alpha
}%

CCProgram post-process-vs %{
  precision highp float;
  #include <legacy/decode-standard>
  #include <builtin/uniforms/cc-global>
  #include <common/common-define>

  out vec2 v_uv;

  void main () {
    StandardVertInput In;
    CCDecode(In);
    CC_HANDLE_GET_CLIP_FLIP(In.position.xy);
    gl_Position = In.position;
    v_uv = a_texCoord;
  }
}%

CCProgram post-process-fs %{
  precision highp float;
  #include <builtin/uniforms/cc-global>
  #include <post-process/anti-aliasing>
  in vec2 v_uv;

  #pragma rate outputResultMap pass
  layout(binding = 0) uniform sampler2D outputResultMap;

  layout(location = 0) out vec4 fragColor;

void texcoords(vec2 fragCoord, vec2 resolution,
			out vec2 v_rgbNW, out vec2 v_rgbNE,
			out vec2 v_rgbSW, out vec2 v_rgbSE,
			out vec2 v_rgbM) {
        vec2 inverseVP = 1.0 / resolution.xy;
        v_rgbNW = (fragCoord + vec2(-1.0, -1.0)) * inverseVP;
        v_rgbNE = (fragCoord + vec2(1.0, -1.0)) * inverseVP;
        v_rgbSW = (fragCoord + vec2(-1.0, 1.0)) * inverseVP;
        v_rgbSE = (fragCoord + vec2(1.0, 1.0)) * inverseVP;
        v_rgbM = vec2(fragCoord * inverseVP);
}

void main () {
    #if ANTIALIAS_TYPE == 1
      mediump vec2 v_rgbNW;
      mediump vec2 v_rgbNE;
      mediump vec2 v_rgbSW;
      mediump vec2 v_rgbSE;
      mediump vec2 v_rgbM;

      vec2 resolution = cc_screenSize.xy;
      vec2 fragCoord = v_uv * resolution;
      texcoords(fragCoord, resolution, v_rgbNW, v_rgbNE, v_rgbSW, v_rgbSE, v_rgbM);
      fragColor = fxaa(outputResultMap, fragCoord, resolution, v_rgbNW, v_rgbNE, v_rgbSW, v_rgbSE, v_rgbM);
    #elif ANTIALIAS_TYPE == 2
      vec3 color = FxaaPixelShader(v_uv, outputResultMap, 1.0 / cc_screenSize.xy);
      fragColor = vec4(color, texture(outputResultMap, v_uv).a);
    #else
      fragColor = texture(outputResultMap, v_uv);
    #endif
  }
}%