// Copyright (c) 2017-2020 Xiamen Yaji Software Co., Ltd.
CCEffect %{
  techniques:
  - passes:
    - vert: profiler-vs:vert
      frag: profiler-fs:frag
      priority: max
      depthStencilState:
        depthTest: false
        depthWrite: false
      blendState:
        targets:
        - blend: true
          blendSrc: src_alpha
          blendDst: one_minus_src_alpha
          blendDstAlpha: one_minus_src_alpha
      rasterizerState:
        cullMode: none
}%

CCProgram profiler-vs %{
  precision mediump float;
  #include <builtin/uniforms/cc-global>

  #pragma define COLS 8 // multiple of 4
  #pragma define ROWS 11
  #pragma define VECTOR_COUNT COLS * ROWS / 4

  in vec3 a_position;
  in vec4 a_color;
  out vec2 v_uv;

  uniform Constants {
    vec4 offset; // xy: bottom-left corner offset, z: symbol width
  };

  uniform PerFrameInfo {
    vec4 digits[VECTOR_COUNT];
  };

  float getComponent(vec4 v, float i) {
    if (i < 1.0) { return v.x; }
    else if (i < 2.0) { return v.y; }
    else if (i < 3.0) { return v.z; }
    else { return v.w; }
  }

  vec4 vert () {
    mat2 proj = mat2(cc_matProj[0].xy, cc_matProj[1].xy);
    proj /= abs(proj[1].x + proj[1].y);
    vec2 position = proj * a_position.xy + offset.xy;

    v_uv = a_color.xy;

    if (a_color.z >= 0.0) {
      float n = getComponent(digits[int(a_color.z)], a_color.w);
      v_uv += vec2(offset.z * n, 0.0);
    }

    return vec4(position, 0.0, 1.0);
  }
}%

CCProgram profiler-fs %{
  precision mediump float;
  #include <legacy/output>

  in vec2 v_uv;
  uniform sampler2D mainTexture;

  vec4 frag () {
    return CCFragOutput(texture(mainTexture, v_uv));
  }
}%