/* * linux/drivers/video/console/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/fb.h>#include <linux/slab.h> #include <asm/io.h> #include "fbcon.h" int soft_cursor(struct fb_info *info, struct fb_cursor *cursor){	struct fbcon_ops *ops = info->fbcon_par;	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 *src, *dst; 	if (info->state != FBINFO_STATE_RUNNING)		return 0; 	s_pitch = (cursor->image.width + 7) >> 3;	dsize = s_pitch * cursor->image.height; 	if (dsize + sizeof(struct fb_image) != ops->cursor_size) {		kfree(ops->cursor_src);		ops->cursor_size = dsize + sizeof(struct fb_image); 		ops->cursor_src = kmalloc(ops->cursor_size, GFP_ATOMIC);		if (!ops->cursor_src) {			ops->cursor_size = 0;			return -ENOMEM;		}	} 	src = ops->cursor_src + sizeof(struct fb_image);	image = (struct fb_image *)ops->cursor_src;	*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);	return 0;}