Function FindZFPCompressionParam

third-party/tinyexr/tinyexr.h:3373–3446

};

static bool FindZFPCompressionParam(ZFPCompressionParam *param,
                                    const EXRAttribute *attributes,
                                    int num_attributes, std::string *err) {
  bool foundType = false;

  for (int i = 0; i < num_attributes; i++) {
    if ((strcmp(attributes[i].name, "zfpCompressionType") == 0)) {
      if (attributes[i].size == 1) {
        param->type = static_cast<int>(attributes[i].value[0]);
        foundType = true;
        break;
      } else {
        if (err) {
          (*err) +=
              "zfpCompressionType attribute must be uchar(1 byte) type.\n";
        }
        return false;
      }
    }
  }

  if (!foundType) {
    if (err) {
      (*err) += "`zfpCompressionType` attribute not found.\n";
    }
    return false;
  }

  if (param->type == TINYEXR_ZFP_COMPRESSIONTYPE_RATE) {
    for (int i = 0; i < num_attributes; i++) {
      if ((strcmp(attributes[i].name, "zfpCompressionRate") == 0) &&
          (attributes[i].size == 8)) {
        param->rate = *(reinterpret_cast<double *>(attributes[i].value));
        return true;
      }
    }

    if (err) {
      (*err) += "`zfpCompressionRate` attribute not found.\n";
    }

  } else if (param->type == TINYEXR_ZFP_COMPRESSIONTYPE_PRECISION) {
    for (int i = 0; i < num_attributes; i++) {
      if ((strcmp(attributes[i].name, "zfpCompressionPrecision") == 0) &&
          (attributes[i].size == 4)) {
        param->rate = *(reinterpret_cast<int *>(attributes[i].value));
        return true;
      }
    }

    if (err) {
      (*err) += "`zfpCompressionPrecision` attribute not found.\n";
    }

  } else if (param->type == TINYEXR_ZFP_COMPRESSIONTYPE_ACCURACY) {
    for (int i = 0; i < num_attributes; i++) {
      if ((strcmp(attributes[i].name, "zfpCompressionTolerance") == 0) &&
          (attributes[i].size == 8)) {