1// { dg-do compile } 2 3void 4filter_scanlines (void *src_buffer, void *dst_buffer, int dst_pitch, int width) 5{ 6 int x; 7 unsigned short *src, *dst_a, *dst_b; 8 9 src = (unsigned short *) src_buffer; 10 dst_a = (unsigned short *) dst_buffer; 11 dst_b = ((unsigned short *) dst_buffer) + (dst_pitch >> 1); 12 13 for (x = 0; x < width; x++) 14 { 15 unsigned char gs, gh; 16 gs = src[x]; 17 gh = gs + (gs >> 1); 18 dst_a[x] = (gh << 5) | (gh); 19 dst_b[x] = ((gs - gh) << 5) | (gs - gh); 20 } 21} 22