projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * linux/drivers/video/softcursor.c -- Generic software cursor for frame buffer devices | |
| 3 | * | |
| 4 | * Created 14 Nov 2002 by James Simmons | |
| 5 | * | |
| 6 | * This file is subject to the terms and conditions of the GNU General Public | |
| 7 | * License. See the file COPYING in the main directory of this archive | |
| 8 | * for more details. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/string.h> | |
| 13 | #include <linux/tty.h> | |
| 14 | #include <linux/fb.h> | |
| 15 | #include <linux/slab.h> | |
| 16 | ||
| 17 | #include <asm/uaccess.h> | |
| 18 | #include <asm/io.h> | |
| 19 | ||
| 20 | int soft_cursor(struct fb_info *info, struct fb_cursor *cursor) | |
| 21 | { | |
| 22 | unsigned int scan_align = info->pixmap.scan_align - 1; | |
| 23 | unsigned int buf_align = info->pixmap.buf_align - 1; | |
| 24 | unsigned int i, size, dsize, s_pitch, d_pitch; | |
| 25 | struct fb_image *image; | |
| 26 | u8 *dst, *src; | |
| 27 | ||
| 28 | if (info->state != FBINFO_STATE_RUNNING) | |
| 29 | return 0; | |
| 30 | ||
| 31 | s_pitch = (cursor->image.width + 7) >> 3; | |
| 32 | dsize = s_pitch * cursor->image.height; | |
| 33 | ||
| 34 | src = kmalloc(dsize + sizeof(struct fb_image), GFP_ATOMIC); | |
| 35 | if (!src) | |
| 36 | return -ENOMEM; | |
| 37 | ||
| 38 | image = (struct fb_image *) (src + dsize); | |
| 39 | *image = cursor->image; | |
| 40 | d_pitch = (s_pitch + scan_align) & ~scan_align; | |
| 41 | ||
| 42 | size = d_pitch * image->height + buf_align; | |
| 43 | size &= ~buf_align; | |
| 44 | dst = fb_get_buffer_offset(info, &info->pixmap, size); | |
| 45 | ||
| 46 | if (cursor->enable) { | |
| 47 | switch (cursor->rop) { | |
| 48 | case ROP_XOR: | |
| 49 | for (i = 0; i < dsize; i++) | |
| 50 | src[i] = image->data[i] ^ cursor->mask[i]; | |
| 51 | break; | |
| 52 | case ROP_COPY: | |
| 53 | default: | |
| 54 | for (i = 0; i < dsize; i++) | |
| 55 | src[i] = image->data[i] & cursor->mask[i]; | |
| 56 | break; | |
| 57 | } | |
| 58 | } else | |
| 59 | memcpy(src, image->data, dsize); | |
| 60 | ||
| f5a9951c JS |
61 | fb_sysmove_buf_aligned(info, &info->pixmap, dst, d_pitch, src, |
| 62 | s_pitch, image->height); | |
| 1da177e4 LT |
63 | |
| 64 | image->data = dst; | |
| 65 | info->fbops->fb_imageblit(info, image); | |
| 66 | kfree(src); | |
| 67 | ||
| 68 | return 0; | |
| 69 | } | |
| 70 | ||
| 71 | EXPORT_SYMBOL(soft_cursor); | |
| 72 | ||
| 73 | MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>"); | |
| 74 | MODULE_DESCRIPTION("Generic software cursor"); | |
| 75 | MODULE_LICENSE("GPL"); |