NAME

     cdpth2tga — CDPTH depth image to TGA converter

SYNOPSIS

     cdpth2tga [options] cdpth 2da tga

DESCRIPTION

     cdpth2tga converts CDPTH depth information files into common TGA images.  CDPTH, Compressed
     DePTH, are used as depth information for area background images in BioWare's Nintendo DS
     game Sonic Chronicles: The Dark Brotherhood.

     Layout-wise, a CDPTH is stored similar to CBGT: cells of 64×64 pixels, compressed using
     Nintendo's 0x10 LZSS algorithm.  Unlike CBGT, though, the cells themselves are not swizzled
     into 8×8 tiles, and the pixel value in CDPTH is a 16bit integer specifying a depth.

     The width and height of the final image is not stored within the CDPTH file, and has to be
     provided from the outside, like from the dimensions of the CBGT image, the dimensions of the
     2DA file for the CBGT image.

     The depth information is stored as 16-bit values, but only the lower 15 bits are used.  For
     conversion into a grayscale image, those 15 bits of grayscale information are further
     compressed to 8-bit.

OPTIONS

     -h
     --help
           Show a help text and exit.
     --version
           Show version information and exit.
     cdpth
         The name of the CDPTH file to read.  The CDPTH contains the depth information part of
         the image.
     2da
         The name of the 2DA file to use.  The 2DA is necessary to know how many cells are in the
         CDPTH file.
     tga
         The resulting TGA file will be written there.

EXAMPLE

     Convert a CDPTH+2DA into a TGA:

           $ cdpth2tga a.cdpth a.2da result.tga

SEE ALSO

     cbgt2tga(1)

     More information about the xoreos project can be found on its website: https://xoreos.org/.

AUTHORS

     This program is part of the xoreos-tools package, which in turn is part of the xoreos
     project, and was written by the xoreos team.  Please see the AUTHORS file for details.