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2001-10-27
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Human Fly 2.1 - paintmodes
============================================================================
All paintmodes known to Human Fly are documented here.
MOVE: replaces destination pixel with source pixel
ADD: ADDs source pixel to destination pixel
OR: ORs source pixel with destination pixel
CEILADD: ADDs source pixel to destination pixel saturated
NOTE: when needed, takes into account individual r,g,b saturation!
Pixels can be:
BYTE: a byte that is simply a 1D intensity, no rgb info
WORD: a highcolor word (16bits)
-----------------------------------------------------------------------------
The behaviour of all primitivepainters for each paintmode and pixelsize.
Note that modes are just left open and in fact are more basic modes. The
reason for this, is that there are alot of impractical combinations.
sprite:
| BYTE | WORD
----------------------
MOVE | yes | yes
----------------------
OR | yes | yes
----------------------
ADD | yes | yes
----------------------
CEILADD | yes | yes
line (flat):
| BYTE | WORD
----------------------
MOVE | yes | yes
----------------------
OR | yes | yes
----------------------
ADD | yes | yes
----------------------
CEILADD | yes | (*)
(*): MOVE mode instead
line (gouraud):
| BYTE | WORD
----------------------
MOVE | yes | yes
----------------------
OR | yes | yes
----------------------
ADD | yes | yes
----------------------
CEILADD | yes | (*)
(*): MOVE mode instead
polygon (flat):
| BYTE | WORD
----------------------
MOVE | yes | yes
----------------------
OR | yes | yes
----------------------
ADD | yes | yes
----------------------
CEILADD | yes | (*)
(*): MOVE mode instead
polygon (gouraud):
| BYTE | WORD
----------------------
MOVE | yes | yes
----------------------
OR | yes | yes
----------------------
ADD | yes | yes
----------------------
CEILADD | yes | (*)
(*): MOVE mode instead
polygon (texture):
| BYTE | WORD
----------------------
MOVE | yes | yes
----------------------
OR | yes | yes
----------------------
ADD | yes | yes
----------------------
CEILADD | (*) | (*)
(*): MOVE mode instead
polygon (alpha):
| BYTE | WORD
----------------------
MOVE | (*) | yes
----------------------
OR | (*) | (*)
----------------------
ADD | (*) | (*)
----------------------
CEILADD | (*) | (*)
(*): WORD/MOVE mode instead
polygon (bump):
| BYTE | WORD
----------------------
MOVE | (*) | yes
----------------------
OR | (*) | (*)
----------------------
ADD | (*) | (*)
----------------------
CEILADD | (*) | (*)
(*): WORD/MOVE mode instead