Changes the write compression method. \n
* If the compression is not supported will return an error code when writing. \n
* Use NULL to set the default compression. You can use the imFileGetInfo to retrieve the actual compression
* but only after \ref imFileWriteImageInfo. Only a few formats allow you to change the compression between frames.
*
* \verbatim ifile:SetInfo(compression: string) [in Lua 5] \endverbatim
* \ingroup file
Changes the write compression method. \n * If the compression is not supported will return an error code when writing. \n * Use NULL to set the default compression. You can use the imFileGetInfo to retrieve the actual compression * but only after \ref imFileWriteImageInfo. Only a few formats allow you to change the compression between frames. * * \verbatim ifile:SetInfo(compression: string) [in Lua 5] \endverbatim * \ingroup file