Topic : TOS - The Operating System
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Version : tos.hyp (December 19, 2008)
Subject : Programmieren/Atari
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Index Size : 93790
HCP-Version : 5
Compiled on : Atari
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View Ref-File6.12 Bit block transfer TOS Name: »Bit block transfer«
Line-A number: $A007
Syntax: See 'Bindings for bit_blt' Description: This Line-A function copies between a rectangular
source and destination block. For this the source area
can be combined with a raster. Source and destination
can be combined with one of 16 possible logical
operations. This function also serves as the basis for
the Line-A functions Text block transfer and Copy
raster form.
For the parameters a structure of the type BITBLT has
to be filled and passed in register A6.
The following logical combinations are available:
Operation Function
0 D' = 0 Destination is background colour
1 D' = S & D
2 D' = S & D
3 D' = S
4 D' = S & D
5 D' = D
6 D' = S ^ D
7 D' = S | D
8 D' = (S | D)
9 D' = (S ^ D)
10 D' = D
11 D' = S | D
12 D' = S
13 D' = S | D
14 D' = (S & D)
15 D' = 1 Destination is foreground colour
D' is the destination after the combination, S and D
are the source and destination before the combination.
& is the logical AND combination, | is OR, ^ is the
exclusive OR (XOR) combination, ! is a NOT inversion.
Return value: The function does not have a return value.
Availability: All TOS versions.
See Also: BindingText block transferCopy raster form