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Re: [pygame] Fade to black question...



Yes, that fixed both problems (green and rolling pixels over incorrectly).

Thanks...

(on Windows if that matters)

~Ty



On Tue, Mar 10, 2009 at 11:02 AM, Brian Fisher
<brian@xxxxxxxxxxxxxxxxxxx> wrote:
> That's a bug. I think all the BLEND_ stuff was broken like that (where green
> is messed up). It should be fixed now, though - can you try a pre-release
> build? If you are on windows or Mac, you can get a pre-release build here:
> http://thorbrian.com/pygame/builds.php
>
> on linux though, I think you'd need to build from source.
>
>
> On Tue, Mar 10, 2009 at 7:32 AM, Ty ... <ty.sqlite@xxxxxxxxx> wrote:
>>
>> I'm trying to get a fade to black working, to that end I've written a
>> simple program just to try it out... the (partial) code looks like
>> this:
>>
>> self.screen.fill(white)
>> self.screen.blit(self.image, self.size, self.size)
>> print self.screen.get_at((4,4));
>> self.screen.fill((2,2,2), None, BLEND_SUB)
>> print self.screen.get_at((4,4));
>> self.screen.fill((2,2,2), None, BLEND_SUB)
>> print self.screen.get_at((4,4));
>> self.screen.fill((2,2,2), None, BLEND_SUB)
>> print self.screen.get_at((4,4));
>> sys.exit()
>>
>> And the output...
>>
>> (46, 46, 44, 255)
>> (44, 255, 42, 255)
>> (42, 255, 40, 255)
>> (40, 255, 38, 255)
>>
>> To me, it looks like it's working for the R and B components, but for
>> some reason G immediately goes to 255 and never changes.  Is there
>> something I'm doing wrong here?
>>
>> Also, one other question... how would I get it to stop at (0,0,0)
>> rather than wrap around?  If I continue the loop for a long time, I
>> get output that looks like this...
>>
>> (8, 255, 6, 255)
>> (6, 255, 4, 255)
>> (4, 255, 2, 255)
>> (2, 255, 0, 255)
>> (0, 255, 254, 255)
>> (254, 255, 252, 255)
>> (252, 255, 250, 255)
>> (250, 255, 248, 255)
>>
>> Which means I've going to have to check that each time and make sure
>> no wrap around has occured?  I might as well loop through every pixel
>> in the image and do this kind of operation myself :P.
>>
>> Thanks!
>>
>> ~Ty
>
>