Rev 468 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 468 | giacomo | 1 | /* |
| 2 | * linux/drivers/video/softcursor.c -- Generic software cursor for frame buffer devices |
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| 3 | * |
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| 4 | * Created 14 Nov 2002 by James Simmons |
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| 5 | * |
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| 6 | * This file is subject to the terms and conditions of the GNU General Public |
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| 7 | * License. See the file COPYING in the main directory of this archive |
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| 8 | * for more details. |
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| 9 | */ |
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| 10 | |||
| 11 | #include <linuxcomp.h> |
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| 12 | |||
| 13 | #include <linux/module.h> |
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| 14 | #include <linux/string.h> |
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| 15 | #include <linux/tty.h> |
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| 16 | #include <linux/fb.h> |
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| 17 | #include <linux/slab.h> |
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| 18 | |||
| 19 | #include <asm/uaccess.h> |
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| 20 | #include <asm/io.h> |
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| 21 | |||
| 22 | int soft_cursor(struct fb_info *info, struct fb_cursor *cursor) |
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| 23 | { |
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| 24 | unsigned int scan_align = info->pixmap.scan_align - 1; |
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| 25 | unsigned int buf_align = info->pixmap.buf_align - 1; |
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| 26 | unsigned int i, size, dsize, s_pitch, d_pitch; |
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| 27 | u8 *dst, src[64]; |
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| 28 | |||
| 29 | if (cursor->set & FB_CUR_SETSIZE) { |
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| 30 | info->cursor.image.height = cursor->image.height; |
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| 31 | info->cursor.image.width = cursor->image.width; |
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| 32 | } |
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| 33 | |||
| 34 | if (cursor->set & FB_CUR_SETPOS) { |
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| 35 | info->cursor.image.dx = cursor->image.dx; |
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| 36 | info->cursor.image.dy = cursor->image.dy; |
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| 37 | } |
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| 38 | |||
| 39 | if (cursor->set & FB_CUR_SETHOT) |
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| 40 | info->cursor.hot = cursor->hot; |
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| 41 | |||
| 42 | if (cursor->set & FB_CUR_SETCMAP) { |
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| 43 | if (cursor->image.depth == 1) { |
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| 44 | info->cursor.image.bg_color = cursor->image.bg_color; |
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| 45 | info->cursor.image.fg_color = cursor->image.fg_color; |
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| 46 | } else { |
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| 47 | if (cursor->image.cmap.len) |
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| 48 | fb_copy_cmap(&cursor->image.cmap, &info->cursor.image.cmap, 0); |
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| 49 | } |
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| 50 | info->cursor.image.depth = cursor->image.depth; |
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| 51 | } |
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| 52 | |||
| 53 | s_pitch = (info->cursor.image.width + 7) >> 3; |
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| 54 | dsize = s_pitch * info->cursor.image.height; |
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| 55 | d_pitch = (s_pitch + scan_align) & ~scan_align; |
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| 56 | size = d_pitch * info->cursor.image.height + buf_align; |
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| 57 | size &= ~buf_align; |
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| 58 | dst = info->pixmap.addr + fb_get_buffer_offset(info, size); |
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| 59 | |||
| 60 | if (info->cursor.enable) { |
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| 61 | switch (info->cursor.rop) { |
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| 62 | case ROP_XOR: |
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| 63 | for (i = 0; i < dsize; i++) |
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| 64 | src[i] = cursor->image.data[i] ^ info->cursor.mask[i]; |
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| 65 | break; |
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| 66 | case ROP_COPY: |
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| 67 | default: |
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| 68 | for (i = 0; i < dsize; i++) |
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| 69 | src[i] = cursor->image.data[i] & info->cursor.mask[i]; |
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| 70 | break; |
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| 71 | } |
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| 72 | } else |
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| 73 | memcpy(src, cursor->image.data, dsize); |
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| 74 | |||
| 75 | move_buf_aligned(info, dst, src, d_pitch, s_pitch, info->cursor.image.height); |
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| 76 | info->cursor.image.data = dst; |
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| 77 | |||
| 78 | info->fbops->fb_imageblit(info, &info->cursor.image); |
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| 79 | atomic_dec(&info->pixmap.count); |
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| 80 | smp_mb__after_atomic_dec(); |
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| 81 | return 0; |
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| 82 | } |
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| 83 | |||
| 84 | EXPORT_SYMBOL(soft_cursor); |
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| 85 | |||
| 86 | MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>"); |
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| 87 | MODULE_DESCRIPTION("Generic software cursor"); |
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| 88 | MODULE_LICENSE("GPL"); |