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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_fillrect.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_fillrect.c')
-rw-r--r-- | apps/plugins/lib/gray_fillrect.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/apps/plugins/lib/gray_fillrect.c b/apps/plugins/lib/gray_fillrect.c new file mode 100644 index 0000000000..ac6d4818b9 --- /dev/null +++ b/apps/plugins/lib/gray_fillrect.c | |||
@@ -0,0 +1,92 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Grayscale framework | ||
11 | * gray_fillrect() 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 | Draw a filled rectangle with the current drawinfo | ||
34 | ---------------------------------------------------------------------------- | ||
35 | See gray_drawpixel() for details | ||
36 | |||
37 | This one uses the block drawing optimization, so it is rather fast. | ||
38 | */ | ||
39 | void gray_fillrect(int x, int y, int nx, int ny) | ||
40 | { | ||
41 | int shift; | ||
42 | unsigned bits, mask_top, mask_bottom; | ||
43 | unsigned char *dst, *dst_row; | ||
44 | void (*blockfunc)(unsigned char *address, unsigned mask, unsigned bits); | ||
45 | |||
46 | if ((unsigned) x >= (unsigned) _graybuf->width | ||
47 | || (unsigned) y >= (unsigned) _graybuf->height) | ||
48 | return; | ||
49 | |||
50 | if ((unsigned) (y + ny) >= (unsigned) _graybuf->height) /* clip bottom */ | ||
51 | ny = _graybuf->height - y; | ||
52 | |||
53 | if ((unsigned) (x + nx) >= (unsigned) _graybuf->width) /* clip right */ | ||
54 | nx = _graybuf->width - x; | ||
55 | |||
56 | dst = _graybuf->data + x + MULU16(_graybuf->width, y >> 3); | ||
57 | shift = y & 7; | ||
58 | ny += shift; | ||
59 | |||
60 | mask_top = 0xFFu << (y & 7); | ||
61 | mask_bottom = ~(0xFEu << ((ny - 1) & 7)); | ||
62 | if (ny <= 8) | ||
63 | mask_bottom &= mask_top; | ||
64 | |||
65 | blockfunc = _gray_blockfuncs[_graybuf->drawmode]; | ||
66 | bits = (_graybuf->drawmode == GRAY_DRAW_BG) ? 0u : 0xFFu; | ||
67 | |||
68 | if (ny > 8) | ||
69 | { | ||
70 | dst_row = dst; | ||
71 | for (x = 0; x < nx; x++) | ||
72 | blockfunc(dst_row++, mask_top, bits); | ||
73 | |||
74 | dst += _graybuf->width; | ||
75 | |||
76 | for (y = 8; y < ny - 8; y += 8) | ||
77 | { | ||
78 | dst_row = dst; | ||
79 | for (x = 0; x < nx; x++) | ||
80 | blockfunc(dst_row++, 0xFFu, bits); | ||
81 | |||
82 | dst += _graybuf->width; | ||
83 | } | ||
84 | } | ||
85 | |||
86 | for (x = 0; x < nx; x++) | ||
87 | blockfunc(dst++, mask_bottom, bits); | ||
88 | } | ||
89 | |||
90 | #endif // #ifdef HAVE_LCD_BITMAP | ||
91 | #endif // #ifndef SIMULATOR | ||
92 | |||