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MUNGE.C
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Text File
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1993-02-04
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815b
|
49 lines
/*
=================
=
= VL_MungePic
=
=================
*/
void VL_MungePic (unsigned char far *source, unsigned width, unsigned height)
{
unsigned x,y,plane,size,pwidth;
unsigned char far *temp, far *dest, far *srcline;
size = width*height;
if (width&3)
errout ("VL_MungePic: Not divisable by 4!\n");
//
// copy the pic to a temp buffer
//
temp = (unsigned char far *)farmalloc (size);
if (!temp)
errout ("Non enough memory for munge buffer!\n");
_fmemcpy (temp,source,size);
//
// munge it back into the original buffer
//
dest = source;
pwidth = width/4;
for (plane=0;plane<4;plane++)
{
srcline = temp;
for (y=0;y<height;y++)
{
for (x=0;x<pwidth;x++)
*dest++ = *(srcline+x*4+plane);
srcline+=width;
}
}
free (temp);
}