1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2008 H. Peter Anvin - All Rights Reserved
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
12 * conditions:
13 *
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * ----------------------------------------------------------------------- */
27
28 #include <inttypes.h>
29 #include <minmax.h>
30 #include <klibc/compiler.h>
31 #include <string.h>
32 #include <com32.h>
33 #include <ilog2.h>
34 #include "vesa.h"
35 #include "video.h"
36
37
38 static struct win_info wi;
39
__vesacon_init_copy_to_screen(void)40 void __vesacon_init_copy_to_screen(void)
41 {
42 struct vesa_mode_info *const mi = &__vesa_info.mi;
43 int winn;
44
45 if (mi->mode_attr & 0x0080) {
46 /* Linear frame buffer */
47
48 wi.win_base = (char *)mi->lfb_ptr;
49 wi.win_size = 1 << 31; /* 2 GB, i.e. one huge window */
50 wi.win_pos = 0; /* Already positioned (only one position...) */
51 wi.win_num = -1; /* Not a window */
52 } else {
53 /* Paged frame buffer */
54
55 /* We have already tested that *one* of these is usable */
56 if ((mi->win_attr[0] & 0x05) == 0x05 && mi->win_seg[0])
57 winn = 0;
58 else
59 winn = 1;
60
61 wi.win_num = winn;
62 wi.win_base = (char *)(mi->win_seg[winn] << 4);
63 wi.win_size = mi->win_size << 10;
64 wi.win_gshift = ilog2(mi->win_grain) + 10;
65 wi.win_pos = -1; /* Undefined position */
66 }
67 }
68
__vesacon_copy_to_screen(size_t dst,const uint32_t * src,size_t npixels)69 void __vesacon_copy_to_screen(size_t dst, const uint32_t * src, size_t npixels)
70 {
71 size_t bytes = npixels * __vesacon_bytes_per_pixel;
72 char rowbuf[bytes + 4] __aligned(4);
73 const uint32_t *s;
74
75 s = (const uint32_t *)__vesacon_format_pixels(rowbuf, src, npixels);
76 firmware->vesa->screencpy(dst, s, bytes, &wi);
77 }
78