[SDL] Re: Surface coordinates can't be less than zero?
t.wilson at hazid.com
Sun Nov 27 14:46:59 PST 2005
David Olofson wrote:
> On Sunday 27 November 2005 19.20, Tom Wilson wrote:
>>>The problem with that is that when I blit the buffer to the
>>>screen, its X- and Y- coordinates will still be set to 0, just
>>>like any other surface.
>>You won't be using -X and -Y co-ordinates to blit.
>>It will solve your problem.
>>You blit the offscreen surface *from* 25,25 to 125,125 to the
>>*screen* at 0,0
>>No negative co-ordinates are involved.
> That does indeed avoid the "problem", and it is the obvious way of
> doing it in a few rare cases - but I can't see the point in
> reinventing clipping outside SDL, especially since SDL will do the
> clipping tests either way. (Unless you bypass the official API, that
Fair point on clipping,
But I thought this guy said that if he feeds in a negative co-ordinate
for a destination blit, it [SDL] zero's the co-ordinates. I assumed
this caused the blit to go to the wrong place on the screen?
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