/* * linux/drivers/video/console/fbcon_rotate.c -- Software Rotation * * Copyright (C) 2005 Antonino Daplas <adaplas @pol.net> * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive for * more details. */ #include <linux/module.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/fb.h> #include <linux/vt_kern.h> #include <linux/console.h> #include <asm/types.h> #include "fbcon.h" #include "fbcon_rotate.h" static int fbcon_rotate_font(struct fb_info *info, struct vc_data *vc) { struct fbcon_ops *ops = info->fbcon_par; int len, err = 0; int s_cellsize, d_cellsize, i; const u8 *src; u8 *dst; if (vc->vc_font.data == ops->fontdata && ops->p->con_rotate == ops->cur_rotate) goto finished; src = ops->fontdata = vc->vc_font.data; ops->cur_rotate = ops->p->con_rotate; len = (!ops->p->userfont) ? 256 : FNTCHARCNT(src); s_cellsize = ((vc->vc_font.width + 7)/8) * vc->vc_font.height; d_cellsize = s_cellsize; if (ops->rotate == FB_ROTATE_CW || ops->rotate == FB_ROTATE_CCW) d_cellsize = ((vc->vc_font.height + 7)/8) * vc->vc_font.width; if (info->fbops->fb_sync) info->fbops->fb_sync(info); if (ops->fd_size < d_cellsize * len) { dst = kmalloc_array(len, d_cellsize, GFP_KERNEL); if (dst == NULL) { err = -ENOMEM; goto finished; } ops->fd_size = d_cellsize * len; kfree(ops->fontbuffer); ops->fontbuffer = dst; } dst = ops->fontbuffer; memset(dst, 0, ops->fd_size); switch (ops->rotate) { case FB_ROTATE_UD: for (i = len; i--; ) { rotate_ud(src, dst, vc->vc_font.width, vc->vc_font.height); src += s_cellsize; dst += d_cellsize; } break; case FB_ROTATE_CW: for (i = len; i--; ) { rotate_cw(src, dst, vc->vc_font.width, vc->vc_font.height); src += s_cellsize; dst += d_cellsize; } break; case FB_ROTATE_CCW: for (i = len; i--; ) { rotate_ccw(src, dst, vc->vc_font.width, vc->vc_font.height); src += s_cellsize; dst += d_cellsize; } break; } finished: return err; } void fbcon_set_rotate(struct fbcon_ops *ops) { ops->rotate_font = fbcon_rotate_font; switch(ops->rotate) { case FB_ROTATE_CW: fbcon_rotate_cw(ops); break; case FB_ROTATE_UD: fbcon_rotate_ud(ops); break; case FB_ROTATE_CCW: fbcon_rotate_ccw(ops); break; } } EXPORT_SYMBOL(fbcon_set_rotate);