OpenEuphoria

Re: xor pixel

• Posted by mjronline <mjronline at IT-WORKS.COM> Jan 05, 1998
• 629 views

Michael Packard wrote:
>
> On Wed, 7 Jan 1998, BABOR, JIRI wrote:
>
> > Can someone give me a really fast xor pixel? Thanks Jiri
> >
> here's one:     .
>
> Michael
Just one pixel? How about a whole bitmap piece?

include graphics.e
include image.e
sequence sima
--sima stores the save_image
<snip>
--*************Start here ***********************
gr=graphics_mode(257)
--800x600x256 color SVGA
<snip>
--***put an ellipse desgin on screen***
<snip>
--***now I will cut a portion of the screen***
--***and then re-paste with bitwise operations***
sima=save_image({60,70},{140,140})
gx=wait_key()
sima=xor_bits(sima,1)
display_image({150,200},sima)
gx=wait_key()
sima=xor_bits(sima,1)
display_image({200,250},sima)
gx=wait_key()

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