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Fading In and out

 
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mdjenkins86



Joined: 11 Nov 2005
Posts: 8
Location: Philly
PostPosted: Tue Jan 03, 2006 8:54 pm    Post subject: Fading In and out Reply with quote
Is it possible to adjust the contrast of the screen? To the effect of fading a screen/image in or out.
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JoshDB



Joined: 05 Oct 2005
Posts: 87
PostPosted: Wed Jan 04, 2006 2:04 am    Post subject: Reply with quote
You should use an image that contains a full 480x272 black square, and underneath have a 100% to 0% aplha gradient. Then just lower it or raise it as needed.
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mdjenkins86



Joined: 11 Nov 2005
Posts: 8
Location: Philly
PostPosted: Wed Jan 04, 2006 7:32 am    Post subject: Reply with quote
okay I think I got you. A png, black square 480x272 (screen}...blit that over an image with varing aplha gradients...is that it?
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mdjenkins86



Joined: 11 Nov 2005
Posts: 8
Location: Philly
PostPosted: Wed Jan 04, 2006 12:55 pm    Post subject: Reply with quote
Thanks Josh it works great.
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justatest



Joined: 19 Dec 2005
Posts: 10
PostPosted: Mon Jan 09, 2006 5:31 pm    Post subject: Reply with quote
can u post the sample code of 'aplha gradients'? i dont get the syntax usage .
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LuMo



Joined: 21 Aug 2005
Posts: 410
Location: Austria
PostPosted: Mon Jan 09, 2006 7:05 pm    Post subject: Reply with quote
justatest wrote:
can u post the sample code of 'aplha gradients'? i dont get the syntax usage .

in an 8888 image (32bit)
all values are 0..255
psp's color format is 0xAABBGGRR
so you have to change value 0xAABBGGRR
to achieve blending, the stepsize depends on how fast you want to blend...

greets
lumo
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