Fading In and out

mdjenkins86 · Post by **mdjenkins86** » Tue Jan 03, 2006 8:54 pm

Is it possible to adjust the contrast of the screen? To the effect of fading a screen/image in or out.

JoshDB · Post by **JoshDB** » Wed Jan 04, 2006 2:04 am

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.

mdjenkins86 · Post by **mdjenkins86** » Wed Jan 04, 2006 7:32 am

okay I think I got you. A png, black square 480x272 (screen}...blit that over an image with varing aplha gradients...is that it?

mdjenkins86 · Post by **mdjenkins86** » Wed Jan 04, 2006 12:55 pm

Thanks Josh it works great.

justatest · Post by **justatest** » Mon Jan 09, 2006 5:31 pm

can u post the sample code of 'aplha gradients'? i dont get the syntax usage .

LuMo · Post by **LuMo** » Mon Jan 09, 2006 7:05 pm

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