Deactivating of a clipping area

SDL Development
1

Hallo,

is it possible to deactivate an active clipping area of a surface ?

Best Regards

–Armin__________________________________________________________________________
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2

El Viernes 22 Junio 2007, Armin Steinhoff escribi?:

is it possible to deactivate an active clipping area of a surface ?

IIRC this is done calling the clipping function again with zero size ( 0, 0,
0, 0)

3

Hello !

is it possible to deactivate an active clipping area of a surface ?

You can do that with SDL_SetClipRect :

http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fSetClipRect

CU

4

“Torsten Giebl” schrieb am 22.06.2007 11:51:31:

Hello !

is it possible to deactivate an active clipping area of a surface ?

You can do that with SDL_SetClipRect :

http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fSetClipRect

Yes, you can activate with that call the clipping function.
As Alberto wrote … setting the y,x,w,h parameter to zero will disable that clipping.

Is it then deactivated because of the dimension of zero of the clipping rectangle?
Or does it suppress the clipping action for each pixel ??

Best Regards

–Armin>

CU

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5

Hello !

You call SDL_SetClipRect (surface, NULL) to set the clipping rect to
the whole surface.

Yes, you can activate with that call the clipping function.
As Alberto wrote … setting the y,x,w,h parameter to zero will disable
that clipping.

Is it then deactivated because of the dimension of zero of the clipping
rectangle?
Or does it suppress the clipping action for each pixel ??

No. There is only one Clipping Rect per Surface.

You can not really deactivate Clipping, you can only set
the Clipping Rect from 0,0 to width, height, simply because
when SDL would not clip it may corrupt other memory when blitting.

Clipping Rect means SDL blits inside the Clipping Rect only and not outside.

CU