Re: [sdljava-users] Problem with sdl_gfx -> aaPolygonRGBA

[Bart L. <bar...@ya...>]

Hi, 

Give a look on sdljava.util.BufferUtil class on CVS,
which have methods to create direct native type
buffers.

CUS,
/Bart.

 --- Robert Schuster <the...@gm...> a écrit : 
> Hi.
> I have not seen how you create and fill the
> ShortBuffer but it could be 
> a problem with endianness/byte-order (or byte sex :)
> ).
> 
>
ByteBuffer.allocateDirect(2*NUM_OF_SHORTS).byteOrder(ByteOrder.nativeOrder()).asShortBuffer()
> 
> should do the trick
> 
> cu
> Robert
> 
> Ivan Z. Ganza wrote:
> 
> > I've checked in code which effectively changes all
> short[] arguments 
> > to ShortBuffers(s) instead.
> >
> > There is a problem however and I'm not sure what
> it is.  Running 
> > test-aaploygonRGBA.bsh results in the following
> out -- although I am 
> > passing sane values when the ShortBuffer is read
> on the C side the 
> > values are all messed up.  This is strange because
> I'm using the same 
> > idea with the OpenGL layer and all seems to work
> fine.  I'm not access 
> > the buffers myself on the OpenGL though, OpenGL
> is, yet it works fine 
> > in that case.  If any has a clue please let me
> know....The code looks 
> > like this:  void* vx and void* vy are pointers
> obtained via 
> > getDirectByteBufferAddress()...
> >
> > int SWIG_aapolygonRGBA(SDL_Surface *dst, void* vx,
> void* vy, int n, 
> > Uint8 r, Uint8 g, Uint8 b, Uint8 a) {
> >
> >    int i;
> >
> >    for (i = 0; i < n; i++) {
> >      Sint16* svx = (Sint16*)vx;
> >      Sint16* svy = (Sint16*)vy;
> >      printf("n=%i, vx=%i, vy=%i\n", i, svx[i],
> svy[i]);
> >    }
> >    return aapolygonRGBA(dst, (Sint16*)vx,
> (Sint16*)vy, n, r, g, b, a);
> >  }
> >
> >
> > n=0, vx=28928, vy=29288
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=28928
> > n=0, vx=31440, vy=31800
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=31440
> > n=0, vx=-31552, vy=-31192
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=-31552
> > n=0, vx=-29040, vy=-28680
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=-29040
> > n=0, vx=-26528, vy=-26168
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=-26528
> > n=0, vx=-24000, vy=-23640
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=-24000
> > n=0, vx=-21488, vy=-21128
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=-21488
> > n=0, vx=-18976, vy=-18616
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=-18976
> > n=0, vx=-16464, vy=-16104
> > n=1, vx=17819, vy=17819
> > n=2, vx=-28704, vy=-16464
> >
> >
> > gol...@un... wrote:
> >
> >> Thanks for responding so quick :)
> >>
> >> If i find some free time today i'll try to
> compile from cvs (which i 
> >> tried before but never succeded)
> >>
> >> Goliat
> >>
> >> PS: if this is a html mail ... sry ;) (trying to
> get kmail working)
> >>
> >>
> >>
>
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> >
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