Blitter: Difference between revisions
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The Atari ST Bit-Block Transfer Processor (BLiTTER) is a hardware implementation of the bit-block transfer (BitBlt) algorithm. BitBlt can be simply described as a procedure that moves bit-aligned data from a source location to a destination location through a given logic operation. | The [[Atari ST]] '''Bit-Block Transfer Processor (BLiTTER)''' is a hardware implementation of the bit-block transfer (BitBlt) algorithm. BitBlt can be simply described as a procedure that moves bit-aligned data from a source location to a destination location through a given logic operation. | ||
==Applications== | |||
The BitBlt primitive that is implemented in the blitter can be used to perform such operations as: | |||
* Area seed filling | * Area seed filling | ||
* Rotation by recursive subdivision | * Rotation by recursive subdivision | ||
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* Pattern filling | * Pattern filling | ||
==Programming== | |||
See [[Blitter manual]] and the Blitter "[[:Category:Blitter|category]]". | |||
==The Blitter in [[TOS Family|TOS Machines]]== | |||
The blitter chip first became available in the [[Mega ST]] range, followed by the [[STE]] and [[Mega STE]]. It was also available as an upgrade for the standard [[ST]] range but not the [[TT]]. | The blitter chip first became available in the [[Mega ST]] range, followed by the [[STE]] and [[Mega STE]]. It was also available as an upgrade for the standard [[ST]] range but not the [[TT]]. | ||
[[Category:Blitter]] | |||
Revision as of 07:18, 1 November 2008
The Atari ST Bit-Block Transfer Processor (BLiTTER) is a hardware implementation of the bit-block transfer (BitBlt) algorithm. BitBlt can be simply described as a procedure that moves bit-aligned data from a source location to a destination location through a given logic operation.
Applications
The BitBlt primitive that is implemented in the blitter can be used to perform such operations as:
- Area seed filling
- Rotation by recursive subdivision
- Slice and smear magnification
- Brush line drawing using Bresenham DDA
- Text transformations (eg. bold, italic, outline)
- Text scrolling
- Window updating
- Pattern filling
Programming
See Blitter manual and the Blitter "category".
The Blitter in TOS Machines
The blitter chip first became available in the Mega ST range, followed by the STE and Mega STE. It was also available as an upgrade for the standard ST range but not the TT.