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