Transparent DDS-Converting FUSE Filesystem
Originally designed for supporting JPEG X-Plane photoscenery, DDSFS combines the transparency of FUSE with the fast decoding of libjpeg-turbo and encoding of FastDXT. It is able to convert textures stored as small-sized .jpg files into game-friendly .dds files transparently during load.
ddsfs [options] <source path> <mount path>
In addition to the standard FUSE options, DDSFS recognizes:
| Option | Description |
|---|---|
| -o cache (default) | Write encoded DDS files to the source path so they can be retrieved instantly later. |
| -o nocache | DDS files are only stored in memory. |
| -o dxt1 (default) | Produce DDS files as DXT1/DXT5. |
| -o rgb | Produce DDS files as RGB/RGBA. |
| -o debug[=#] | Writes status/debugging information. Values for # range from 1 to 3. |
DDSFS can be used on Windows with the Dokan FUSE wrapper. A Cygwin binary is available from Jenkins.
It has been developed and tested with 1.1.0.2000 but may work with other versions.
Dokan can mount on either a path or a drive letter, and symbolic links can be used to redirect specific paths.
Currently supported formats:
.jpg to DXT1 or RGB
.webp to DXT1/DXT5 or RGBA
On my system, it will convert a 4096x4096 .jpg texture to .dds encoded with DXT1 in around 100 ms. In X-Plane 11, this gave me around a 3 minute initial load time in a photoscenery-covered area, and no noticible pauses when flying. Using .webp is significantly slower, it takes around 300 ms to convert a 4096x4096 file on my system.