Function LoadEXR

SampleFramework12/v1.00/TinyEXR.cpp:6978–7062

} // namespace

int LoadEXR(float **out_rgba, int *width, int *height, const char *filename,
            const char **err) {

  if (out_rgba == NULL) {
    if (*err) {
      (*err) = "Invalid argument.\n";
    }
    return -1;
  }

  EXRImage exrImage;
  int ret = LoadMultiChannelEXR(&exrImage, filename, err);
  if (ret != 0) {
    return ret;
  }

  // RGBA
  int idxR = -1;
  int idxG = -1;
  int idxB = -1;
  int idxA = -1;
  for (int c = 0; c < exrImage.num_channels; c++) {
    if (strcmp(exrImage.channel_names[c], "R") == 0) {
      idxR = c;
    } else if (strcmp(exrImage.channel_names[c], "G") == 0) {
      idxG = c;
    } else if (strcmp(exrImage.channel_names[c], "B") == 0) {
      idxB = c;
    } else if (strcmp(exrImage.channel_names[c], "A") == 0) {
      idxA = c;
    }
  }

  if (idxR == -1) {
    if (*err) {
      (*err) = "R channel not found\n";
    }

    // @todo { free exrImage }
    return -1;
  }

  if (idxG == -1) {
    if (*err) {
      (*err) = "G channel not found\n";
    }
    // @todo { free exrImage }
    return -1;
  }

  if (idxB == -1) {
    if (*err) {
      (*err) = "B channel not found\n";
    }
    // @todo { free exrImage }
    return -1;
  }