1/* 2 * linux/drivers/video/console/softcursor.c 3 * 4 * Generic software cursor for frame buffer devices 5 * 6 * Created 14 Nov 2002 by James Simmons 7 * 8 * This file is subject to the terms and conditions of the GNU General 9 * Public License. See the file COPYING in the main directory of this 10 * archive for more details. 11 */ 12 13#include <linux/module.h> 14#include <linux/string.h> 15#include <linux/fb.h> 16#include <linux/slab.h> 17 18#include <asm/uaccess.h> 19#include <asm/io.h> 20 21#include "fbcon.h" 22 23int soft_cursor(struct fb_info *info, struct fb_cursor *cursor) 24{ 25 struct fbcon_ops *ops = info->fbcon_par; 26 unsigned int scan_align = info->pixmap.scan_align - 1; 27 unsigned int buf_align = info->pixmap.buf_align - 1; 28 unsigned int i, size, dsize, s_pitch, d_pitch; 29 struct fb_image *image; 30 u8 *src, *dst; 31 32 if (info->state != FBINFO_STATE_RUNNING) 33 return 0; 34 35 s_pitch = (cursor->image.width + 7) >> 3; 36 dsize = s_pitch * cursor->image.height; 37 38 if (dsize + sizeof(struct fb_image) != ops->cursor_size) { 39 if (ops->cursor_src != NULL) 40 kfree(ops->cursor_src); 41 ops->cursor_size = dsize + sizeof(struct fb_image); 42 43 ops->cursor_src = kmalloc(ops->cursor_size, GFP_ATOMIC); 44 if (!ops->cursor_src) { 45 ops->cursor_size = 0; 46 return -ENOMEM; 47 } 48 } 49 50 src = ops->cursor_src + sizeof(struct fb_image); 51 image = (struct fb_image *)ops->cursor_src; 52 *image = cursor->image; 53 d_pitch = (s_pitch + scan_align) & ~scan_align; 54 55 size = d_pitch * image->height + buf_align; 56 size &= ~buf_align; 57 dst = fb_get_buffer_offset(info, &info->pixmap, size); 58 59 if (cursor->enable) { 60 switch (cursor->rop) { 61 case ROP_XOR: 62 for (i = 0; i < dsize; i++) 63 src[i] = image->data[i] ^ cursor->mask[i]; 64 break; 65 case ROP_COPY: 66 default: 67 for (i = 0; i < dsize; i++) 68 src[i] = image->data[i] & cursor->mask[i]; 69 break; 70 } 71 } else 72 memcpy(src, image->data, dsize); 73 74 fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, image->height); 75 image->data = dst; 76 info->fbops->fb_imageblit(info, image); 77 return 0; 78} 79 80EXPORT_SYMBOL(soft_cursor); 81 82MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>"); 83MODULE_DESCRIPTION("Generic software cursor"); 84MODULE_LICENSE("GPL"); 85