Function SaveDeepEXR

SampleFramework11/v1.02/TinyEXR.cpp:8089–8331

}

int SaveDeepEXR(const DeepImage *deepImage, const char *filename,
                const char **err) {
  if (deepImage == NULL || filename == NULL) {
    if (err) {
      (*err) = "Invalid argument.";
    }
    return -1;
  }

  FILE *fp = fopen(filename, "rb");
  if (!fp) {
    if (err) {
      (*err) = "Cannot write file.";
    }
    return -1;
  }

  // Write header check.
  {
    const char header[] = {0x76, 0x2f, 0x31, 0x01};
    size_t n = fwrite(header, 1, 4, fp);
    if (n != 4) {
      if (err) {
        (*err) = "Header write failed.";
      }
      fclose(fp);
      return -3;
    }
  }

  // Version, scanline.
  {
    // ver 2.0, scanline, deep bit on(0x800)
    const char data[] = {2, 8, 0, 0};
    size_t n = fwrite(data, 1, 4, fp);
    if (n != 4) {
      if (err) {
        (*err) = "Flag write failed.";
      }
      fclose(fp);
      return -3;
    }
  }

  // Write attributes.
  {
    int data = 2; // ZIPS
    WriteAttribute(fp, "compression", "compression",
                   reinterpret_cast<const unsigned char *>(&data), sizeof(int));
  }

  {
    int data[4] = {0, 0, deepImage->width - 1, deepImage->height - 1};
    WriteAttribute(fp, "dataWindow", "box2i",
                   reinterpret_cast<const unsigned char *>(data),
                   sizeof(int) * 4);
    WriteAttribute(fp, "displayWindow", "box2i",
                   reinterpret_cast<const unsigned char *>(data),