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author | Jens Arnold <amiconn@rockbox.org> | 2004-06-23 22:15:50 +0000 |
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committer | Jens Arnold <amiconn@rockbox.org> | 2004-06-23 22:15:50 +0000 |
commit | 7c6bdd64935452464b21f99198896c34569105e5 (patch) | |
tree | becd4aeb5498966aea5629f1e692ba5131192b5e /apps/plugins/lib/gray_scroll_up8.c | |
parent | 8877ad943eb077d10a0725b47c55a8b2f55f319a (diff) | |
download | rockbox-7c6bdd64935452464b21f99198896c34569105e5.tar.gz rockbox-7c6bdd64935452464b21f99198896c34569105e5.zip |
Split grayscale library into several files to make up a real function library. Significantly decreases binary size for plugins using it.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4802 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins/lib/gray_scroll_up8.c')
-rw-r--r-- | apps/plugins/lib/gray_scroll_up8.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/apps/plugins/lib/gray_scroll_up8.c b/apps/plugins/lib/gray_scroll_up8.c new file mode 100644 index 0000000000..b181673f22 --- /dev/null +++ b/apps/plugins/lib/gray_scroll_up8.c | |||
@@ -0,0 +1,69 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Grayscale framework | ||
11 | * gray_scroll_up8() function | ||
12 | * | ||
13 | * This is a generic framework to use grayscale display within Rockbox | ||
14 | * plugins. It obviously does not work for the player. | ||
15 | * | ||
16 | * Copyright (C) 2004 Jens Arnold | ||
17 | * | ||
18 | * All files in this archive are subject to the GNU General Public License. | ||
19 | * See the file COPYING in the source tree root for full license agreement. | ||
20 | * | ||
21 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
22 | * KIND, either express or implied. | ||
23 | * | ||
24 | ****************************************************************************/ | ||
25 | |||
26 | #ifndef SIMULATOR /* not for simulator by now */ | ||
27 | #include "plugin.h" | ||
28 | |||
29 | #ifdef HAVE_LCD_BITMAP /* and also not for the Player */ | ||
30 | #include "gray.h" | ||
31 | |||
32 | /*--------------------------------------------------------------------------- | ||
33 | Scroll the whole grayscale buffer up by 8 pixels | ||
34 | ---------------------------------------------------------------------------- | ||
35 | black_border determines if the pixels scrolled in at the bottom are black | ||
36 | or white | ||
37 | |||
38 | Scrolling up/down by 8 pixels is very fast. | ||
39 | */ | ||
40 | void gray_scroll_up8(bool black_border) | ||
41 | { | ||
42 | int by, d; | ||
43 | unsigned filler; | ||
44 | unsigned char *ptr; | ||
45 | |||
46 | filler = black_border ? 0xFF : 0; | ||
47 | |||
48 | /* Scroll row by row to minimize flicker (byte rows = 8 pixels each) */ | ||
49 | for (by = 1; by < _graybuf->bheight; by++) | ||
50 | { | ||
51 | ptr = _graybuf->data + MULU16(_graybuf->width, by); | ||
52 | for (d = 0; d < _graybuf->depth; d++) | ||
53 | { | ||
54 | _gray_rb->memcpy(ptr - _graybuf->width, ptr, _graybuf->width); | ||
55 | ptr += _graybuf->plane_size; | ||
56 | } | ||
57 | } | ||
58 | /* fill last row */ | ||
59 | ptr = _graybuf->data + _graybuf->plane_size - _graybuf->width; | ||
60 | for (d = 0; d < _graybuf->depth; d++) | ||
61 | { | ||
62 | _gray_rb->memset(ptr, filler, _graybuf->width); | ||
63 | ptr += _graybuf->plane_size; | ||
64 | } | ||
65 | } | ||
66 | |||
67 | #endif // #ifdef HAVE_LCD_BITMAP | ||
68 | #endif // #ifndef SIMULATOR | ||
69 | |||