[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [pygame] blitting feature request
This sounds pretty cool. Although I'm not really sure
what it would be good for?
--- Ken Seehof <firstname.lastname@example.org> wrote:
> Unless I missed something, there is no support for
> blitting with boolean
> as is supported by nearly all GUI systems. The only
> mode currently
> supported is
> "paint" mode.
> What would be really cool would be the blitting
> model used by the Amiga. The
> Amiga supports all 256 possible boolean operators on
> 3 inputs by using an 8 bit
> truth table. The inputs are (source, mask, dest),
> the ouput is dest.
> What's cool about this model is that if you define
> the following constants to
> represent the three inputs...
> A = 10101010
> B = 11001100
> C = 11110000
> ... you can get the desired boolean operator code by
> applying the operators to
> A, B and C. This makes your code very easy to read.
> XOR = A^C
> PAINT = (A&B)|(C&~B)
> target.blit_bool(source, None, XOR, rect)
> These operator codes would, of course, have to be
> mapped to the appropriate
> codes specific to the target hardware platform, and
> operators that reduce to 2
> input operators would be optimized accordingly.
> - Ken
Do You Yahoo!?
Everything you'll ever need on one web page
from News and Sport to Email and Music Charts
pygame mailing list