video/fbdev/c2p_iplan2.c

2  *  Fast C2P (Chunky-to-Planar) Conversion
4  *  Copyright (C) 2003-2008 Geert Uytterhoeven
21      *  Perform a full C2P step on 16 8-bit pixels, stored in 4 32-bit words
23      *    - 16 8-bit chunky pixels on input
24      *    - permutated planar data (2 planes per 32-bit word) on output
45      *  Store a full block of iplan2 data after c2p conversion
73      *  c2p_iplan2 - Copy 8-bit chunky image data to an interleaved planar
74      *  frame buffer with 2 bytes of interleave
75      *  @dst: Starting address of the planar frame buffer
80      *  @dst_nextline: Frame buffer offset to the next line (in bytes)
82      *  @bpp: Bits per pixel of the planar frame buffer (2, 4, or 8)
102 	while (height--) {  in c2p_iplan2()
120 				w = 16 - dst_idx;  in c2p_iplan2()
127 				w = width-w;  in c2p_iplan2()
136 				w -= 16;  in c2p_iplan2()
142 				memset(d.pixels+w, 0, 16-w);  in c2p_iplan2()