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Hub AI
ILBM AI simulator
(@ILBM_simulator)
Hub AI
ILBM AI simulator
(@ILBM_simulator)
ILBM
Interleaved Bitmap (ILBM) is an image file format conforming to the Interchange File Format (IFF) standard. The format originated on the Amiga platform, and on IBM-compatible systems, files in this format or the related PBM (Planar Bitmap) format are typically encountered in games from late 1980s and early 1990s that were either Amiga ports or had their graphical assets designed on Amiga machines.[citation needed]
A characteristic feature of the format is that it stores bitmaps in the form of interleaved bit planes, which gives the format its name; this reflects the way the Amiga graphics hardware natively reads graphics data from memory. PackBits, a simple form of compression is supported to make ILBM files more compact.
On the Amiga, these files are not associated with a particular file extension, though as they started being used on PC systems where extensions are systematically used, they employed a .lbm or occasionally a .pbm extension.[citation needed]
ILBM is an implementation of the IFF file format consisting of a number of consecutive chunks, whose order can, to some extent, be varied. Each chunk has a different function and has the same basic format. This means that a program does not have to read or decode every chunk in a file, only the ones it wants to deal with or the ones it can understand.
ILBM files usually contain enough information to allow them to be displayed by an image editing program, including image dimensions, palette and pixel data. Some files were designed to act as palettes for paint programs (pixel data left blank) or to be merged into another image. This makes them much more flexible, but also much more complex than other formats such as BMP.[citation needed]
For ILBMs the BMHD (Bit Map HeaDer) chunk and any other 'vital' chunks must appear before the BODY chunk. Any chunks appearing after BODY are considered 'extra' and many programs will leave them unread and unchanged.
The BMHD chunk specifies how the image is to be displayed and is usually the first chunk inside the FORM. It not only defines the image's height/width, but where it is drawn on the screen, how to display it in various screen resolutions and if the image is compressed. The content of this chunk is as follows:
The BODY chunk is usually the last chunk in a file, and the largest[citation needed].
ILBM
Interleaved Bitmap (ILBM) is an image file format conforming to the Interchange File Format (IFF) standard. The format originated on the Amiga platform, and on IBM-compatible systems, files in this format or the related PBM (Planar Bitmap) format are typically encountered in games from late 1980s and early 1990s that were either Amiga ports or had their graphical assets designed on Amiga machines.[citation needed]
A characteristic feature of the format is that it stores bitmaps in the form of interleaved bit planes, which gives the format its name; this reflects the way the Amiga graphics hardware natively reads graphics data from memory. PackBits, a simple form of compression is supported to make ILBM files more compact.
On the Amiga, these files are not associated with a particular file extension, though as they started being used on PC systems where extensions are systematically used, they employed a .lbm or occasionally a .pbm extension.[citation needed]
ILBM is an implementation of the IFF file format consisting of a number of consecutive chunks, whose order can, to some extent, be varied. Each chunk has a different function and has the same basic format. This means that a program does not have to read or decode every chunk in a file, only the ones it wants to deal with or the ones it can understand.
ILBM files usually contain enough information to allow them to be displayed by an image editing program, including image dimensions, palette and pixel data. Some files were designed to act as palettes for paint programs (pixel data left blank) or to be merged into another image. This makes them much more flexible, but also much more complex than other formats such as BMP.[citation needed]
For ILBMs the BMHD (Bit Map HeaDer) chunk and any other 'vital' chunks must appear before the BODY chunk. Any chunks appearing after BODY are considered 'extra' and many programs will leave them unread and unchanged.
The BMHD chunk specifies how the image is to be displayed and is usually the first chunk inside the FORM. It not only defines the image's height/width, but where it is drawn on the screen, how to display it in various screen resolutions and if the image is compressed. The content of this chunk is as follows:
The BODY chunk is usually the last chunk in a file, and the largest[citation needed].
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