75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
|
|
* linux/drivers/video/softcursor.c -- Generic software cursor for frame buffer devices
|
|
*
|
|
* Created 14 Nov 2002 by James Simmons
|
|
*
|
|
* 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/tty.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "fbcon.h"
|
|
|
|
int soft_cursor(struct fb_info *info, struct fb_cursor *cursor)
|
|
{
|
|
unsigned int scan_align = info->pixmap.scan_align - 1;
|
|
unsigned int buf_align = info->pixmap.buf_align - 1;
|
|
unsigned int i, size, dsize, s_pitch, d_pitch;
|
|
struct fb_image *image;
|
|
u8 *dst, *src;
|
|
|
|
if (info->state != FBINFO_STATE_RUNNING)
|
|
return 0;
|
|
|
|
s_pitch = (cursor->image.width + 7) >> 3;
|
|
dsize = s_pitch * cursor->image.height;
|
|
|
|
src = kmalloc(dsize + sizeof(struct fb_image), GFP_ATOMIC);
|
|
if (!src)
|
|
return -ENOMEM;
|
|
|
|
image = (struct fb_image *) (src + dsize);
|
|
*image = cursor->image;
|
|
d_pitch = (s_pitch + scan_align) & ~scan_align;
|
|
|
|
size = d_pitch * image->height + buf_align;
|
|
size &= ~buf_align;
|
|
dst = fb_get_buffer_offset(info, &info->pixmap, size);
|
|
|
|
if (cursor->enable) {
|
|
switch (cursor->rop) {
|
|
case ROP_XOR:
|
|
for (i = 0; i < dsize; i++)
|
|
src[i] = image->data[i] ^ cursor->mask[i];
|
|
break;
|
|
case ROP_COPY:
|
|
default:
|
|
for (i = 0; i < dsize; i++)
|
|
src[i] = image->data[i] & cursor->mask[i];
|
|
break;
|
|
}
|
|
} else
|
|
memcpy(src, image->data, dsize);
|
|
|
|
fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, image->height);
|
|
image->data = dst;
|
|
info->fbops->fb_imageblit(info, image);
|
|
kfree(src);
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(soft_cursor);
|
|
|
|
MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
|
|
MODULE_DESCRIPTION("Generic software cursor");
|
|
MODULE_LICENSE("GPL");
|