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