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Bit blit (also written BITBLT, BIT BLT, BitBLT, Bit BLT, Bit Blt etc., which stands for bit block transfer) is a data operation commonly used in computer graphics in which several bitmaps are combined into one using a boolean function.[1]
The operation involves at least two bitmaps: a "source" (or "foreground") and a "destination" (or "background"), and possibly a third that is often called the "mask". The result may be written to a fourth bitmap, though often it replaces the destination. The pixels of each are combined using a program-selectable raster operation, a bit-wise boolean formula. The most obvious raster operation overwrites the destination with the source. Others may involve AND, OR, XOR, and NOT operations.[1] The Commodore Amiga's graphics chipset (and others) could combine three source bitmaps using any of the 256 possible 3-input boolean functions.
Modern graphics software has almost completely replaced bitwise operations with more general mathematical operations used for effects such as alpha compositing. This is because bitwise operations on color displays do not usually produce results that resemble the physical combination of lights or inks. Some software still uses XOR to draw interactive highlight rectangles or region borders; when this is done to color images, the unusual resulting colors are easily seen.
^ abSanchez, Julio; Maria P. Canton (2007). "Displaying Bit-Mapped images". Software solutions for engineers and scientists. CRC Press. p. 690.
Bitblit (also written BITBLT, BIT BLT, BitBLT, Bit BLT, Bit Blt etc., which stands for bit block transfer) is a data operation commonly used in computer...
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media related to 2D. 2.5D 3D computer graphics Computer animation CGI Bitblit Computer graphics Graphic art software Graphics Image scaling List of home...
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PARC circa 1972–1984), implemented Smalltalk virtual machine, invented bitblit Van Jacobson (at PARC 2006– ), developed internet congestion control protocols...
use as bitmap. The Amiga windowing system would then use a series of bitblits using the system's hardware blitter to build a composite of these applications'...
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consisted of a desk-side unit housing a Motorola 68000 processor, a dedicated bitblit accelerator built from AMD 2901 logic, and a total of 640KB of RAM (128KB...
use as bitmap. The Amiga windowing system would then use a series of bitblits using the system's hardware blitter to build a composite of these applications'...
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