Loads an image from an already open file, but forces the image to be a bitmap.\n
* This function assumes that the image in the file has the same parameters as the given image. \n
* The imagem must be a Bitmap image, with color_space RGB, MAP, GRAY or BINARY, and data_type IM_BYTE. \n
* index specifies the image number between 0 and image_count-1. \n
* Returns NULL if failed.
* Attributes from the file will be stored at the image.
* See also \ref imErrorCodes.
*
* \verbatim ifile:LoadBitmapFrame(index: number, image: imImage) -> error: number [in Lua 5] \endverbatim
* Default index is 0.
* \ingroup imgfile
Loads an image from an already open file, but forces the image to be a bitmap.\n * This function assumes that the image in the file has the same parameters as the given image. \n * The imagem must be a Bitmap image, with color_space RGB, MAP, GRAY or BINARY, and data_type IM_BYTE. \n * index specifies the image number between 0 and image_count-1. \n * Returns NULL if failed. * Attributes from the file will be stored at the image. * See also \ref imErrorCodes. * * \verbatim ifile:LoadBitmapFrame(index: number, image: imImage) -> error: number [in Lua 5] \endverbatim * Default index is 0. * \ingroup imgfile