User manual

Front Panel Operation Imagestore User Manual
Page 50 Miranda Technologies Ltd
File Type Description
TARGA (*.TGA)
8-bit (Greyscale), 24-bit (RGB) and 32-bit (RGB + Key)
TARGA files in both compressed and uncompressed variants.
JPEG (*.JPG)
'Lossy' compressed images. This format does not support key
information.
Miranda OXT (*.OXT)
Miranda Technologies Ltd still images and logos. 4:2:2:4 format,
10 bits per pixel.
Miranda OXA (*.OXA)
Miranda Technologies Ltd animations and clocks. 4:2:2:4 format
10 bits per pixel
Images On More Than One Disk
Various techniques are available to deal with large images and animations
that cannot normally be placed on a single floppy disk.
The Media Conversion Software (MCS) image, animation and clock building
tools supplied with Imagestore can all generate disk sets, where a single large
file is split over multiple floppies (called disk spanning)'. When this
technique is used, the MCS tools also apply loss-less compression to the file
to reduce the number of disks required.
To load an image or animation held on multiple floppies put the first disk in
the drive, select the load from FDD option and press enter. Imagestore will
prompt you for the each subsequent disk as it is required.
The floppies can be presented in any order. Imagestore will automatically
combine and decompress the resulting file. Each component file of a multi-
disk set has the special name SPANFILE.OXM.
Special File Types
Any file named KEY.TGA is given special treatment as it is taken to be the
key image for the most recently loaded file. This process allows 'fill' and 'key'
Targa files to be combined internally to give the equivalent of a 32-bit
RGB+Key Targa file, by loading two files called, for example
MYPICTURE.TGA and KEY.TGA.
Any file called IMAG.KEY is also treated specially as a key image in .OXT
format. When an image saved by Imagestore cannot fit on a single disk, two
disks are written. The first disk holds a file called IMAG.OXT and the second
disk holds IMAG.KEY.