tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/drivers/video/console/fbcon_rotate.c -- Software Rotation
3 *
4 * Copyright (C) 2005 Antonino Daplas <adaplas @pol.net>
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 */
10
11#include <linux/errno.h>
12#include <linux/fb.h>
13#include <linux/font.h>
14
15#include "fbcon.h"
16#include "fbcon_rotate.h"
17
18int fbcon_rotate_font(struct fb_info *info, struct vc_data *vc)
19{
20 struct fbcon_par *par = info->fbcon_par;
21 unsigned char *buf;
22 int ret;
23
24 if (par->p->fontdata == par->rotated.fontdata && par->rotate == par->rotated.buf_rotate)
25 return 0;
26
27 par->rotated.fontdata = par->p->fontdata;
28 par->rotated.buf_rotate = par->rotate;
29
30 if (info->fbops->fb_sync)
31 info->fbops->fb_sync(info);
32
33 buf = font_data_rotate(par->rotated.fontdata, vc->vc_font.width,
34 vc->vc_font.height, vc->vc_font.charcount,
35 par->rotated.buf_rotate, par->rotated.buf,
36 &par->rotated.bufsize);
37 if (IS_ERR(buf)) {
38 ret = PTR_ERR(buf);
39 goto err_kfree;
40 }
41
42 par->rotated.buf = buf;
43
44 return 0;
45
46err_kfree:
47 kfree(par->rotated.buf);
48 par->rotated.buf = NULL; /* clear here to avoid output */
49 par->rotated.bufsize = 0;
50
51 return ret;
52}