cairo_status_t
Image::decodeJPEGIntoSurface(jpeg_decompress_struct *info) {
  int stride = width * 4;
  cairo_status_t status;

  uint8_t *data = (uint8_t *) malloc(width * height * 4);
  if (!data) {
    jpeg_abort_decompress(info);
    jpeg_destroy_decompress(info);
    return CAIRO_STATUS_NO_MEMORY;
  }

  uint8_t *src = (uint8_t *) malloc(width * info->output_components);
  if (!src) {
    free(data);
    jpeg_abort_decompress(info);
    jpeg_destroy_decompress(info);
    return CAIRO_STATUS_NO_MEMORY;
  }

  for (int y = 0; y < height; ++y) {
    jpeg_read_scanlines(info, &src, 1);
    uint32_t *row = (uint32_t *)(data + stride * y);
    for (int x = 0; x < width; ++x) {
      if (info->jpeg_color_space == 1) {
        uint32_t *pixel = row + x;
        *pixel = 255 << 24
          | src[x] << 16
          | src[x] << 8
          | src[x];
      } else {
        int bx = 3 * x;
        uint32_t *pixel = row + x;
        *pixel = 255 << 24
          | src[bx + 0] << 16
          | src[bx + 1] << 8
          | src[bx + 2];
      }
    }
  }

  _surface = cairo_image_surface_create_for_data(
      data
    , CAIRO_FORMAT_ARGB32
    , width
    , height
    , cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width));

  jpeg_finish_decompress(info);
  jpeg_destroy_decompress(info);
  status = cairo_surface_status(_surface);

  if (status) {
    free(data);
    free(src);
    return status;
  }

  free(src);

  _data = data;

  return CAIRO_STATUS_SUCCESS;
}