#include <metal_stdlib>

using namespace metal;

template<typename T, size_t N>
struct tint_array {
    const constant T& operator[](size_t i) const constant { return elements[i]; }
    device T& operator[](size_t i) device { return elements[i]; }
    const device T& operator[](size_t i) const device { return elements[i]; }
    thread T& operator[](size_t i) thread { return elements[i]; }
    const thread T& operator[](size_t i) const thread { return elements[i]; }
    threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
    const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
    T elements[N];
};

struct GammaTransferParams {
  /* 0x0000 */ float G;
  /* 0x0004 */ float A;
  /* 0x0008 */ float B;
  /* 0x000c */ float C;
  /* 0x0010 */ float D;
  /* 0x0014 */ float E;
  /* 0x0018 */ float F;
  /* 0x001c */ uint padding;
};

struct ExternalTextureParams {
  /* 0x0000 */ uint numPlanes;
  /* 0x0004 */ uint doYuvToRgbConversionOnly;
  /* 0x0008 */ tint_array<int8_t, 8> tint_pad;
  /* 0x0010 */ float3x4 yuvToRgbConversionMatrix;
  /* 0x0040 */ GammaTransferParams gammaDecodeParams;
  /* 0x0060 */ GammaTransferParams gammaEncodeParams;
  /* 0x0080 */ float3x3 gamutConversionMatrix;
};

float3 gammaCorrection(float3 v, GammaTransferParams params) {
  bool3 const cond = (fabs(v) < float3(params.D));
  float3 const t_1 = (sign(v) * ((params.C * fabs(v)) + params.F));
  float3 const f = (sign(v) * (pow(((params.A * fabs(v)) + params.B), float3(params.G)) + params.E));
  return select(f, t_1, cond);
}

float4 textureLoadExternal(texture2d<float, access::sample> plane0, texture2d<float, access::sample> plane1, int2 coord, ExternalTextureParams params) {
  float3 color = 0.0f;
  if ((params.numPlanes == 1u)) {
    color = float4(plane0.read(uint2(coord), 0)).rgb;
  } else {
    color = (float4(plane0.read(uint2(coord), 0)[0], float4(plane1.read(uint2(coord), 0)).rg, 1.0f) * params.yuvToRgbConversionMatrix);
  }
  if ((params.doYuvToRgbConversionOnly == 0u)) {
    color = gammaCorrection(color, params.gammaDecodeParams);
    color = (params.gamutConversionMatrix * color);
    color = gammaCorrection(color, params.gammaEncodeParams);
  }
  return float4(color, 1.0f);
}

int2 tint_clamp(int2 e, int2 low, int2 high) {
  return min(max(e, low), high);
}

kernel void tint_symbol(texture2d<float, access::sample> tint_symbol_5 [[texture(0)]], texture2d<float, access::sample> tint_symbol_6 [[texture(1)]], const constant ExternalTextureParams* tint_symbol_7 [[buffer(0)]], texture2d<float, access::write> tint_symbol_8 [[texture(2)]]) {
  int2 const tint_symbol_1 = tint_clamp(int2(10), int2(0), int2((uint2(uint2(tint_symbol_5.get_width(), tint_symbol_5.get_height())) - uint2(1u))));
  float4 red = textureLoadExternal(tint_symbol_5, tint_symbol_6, tint_symbol_1, *(tint_symbol_7));
  int2 const tint_symbol_2 = tint_clamp(int2(0), int2(0), int2((uint2(uint2(tint_symbol_8.get_width(), tint_symbol_8.get_height())) - uint2(1u))));
  tint_symbol_8.write(red, uint2(tint_symbol_2));
  int2 const tint_symbol_3 = tint_clamp(int2(70, 118), int2(0), int2((uint2(uint2(tint_symbol_5.get_width(), tint_symbol_5.get_height())) - uint2(1u))));
  float4 green = textureLoadExternal(tint_symbol_5, tint_symbol_6, tint_symbol_3, *(tint_symbol_7));
  int2 const tint_symbol_4 = tint_clamp(int2(1, 0), int2(0), int2((uint2(uint2(tint_symbol_8.get_width(), tint_symbol_8.get_height())) - uint2(1u))));
  tint_symbol_8.write(green, uint2(tint_symbol_4));
  return;
}