6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/*
|
|
* 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/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(d_cellsize * len, 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);
|
|
|
|
MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>");
|
|
MODULE_DESCRIPTION("Console Rotation Support");
|
|
MODULE_LICENSE("GPL");
|