Mercurial > sdl-ios-xcode
annotate src/video/default_cursor.h @ 1542:a8bf1aa21020
Fixed bug #15
SDL_blit_A.mmx-speed.patch.txt --
Speed improvements and a bugfix for the current GCC inline mmx
asm code:
- Changed some ops and removed some resulting useless ones.
- Added some instruction parallelism (some gain)
The resulting speed on my Xeon improved upto 35% depending on
the function (measured in fps).
- Fixed a bug where BlitRGBtoRGBSurfaceAlphaMMX() was
setting the alpha component on the destination surfaces (to
opaque-alpha) even when the surface had none.
SDL_blit_A.mmx-msvc.patch.txt --
MSVC mmx intrinsics version of the same GCC asm code.
MSVC compiler tries to parallelize the code and to avoid
register stalls, but does not always do a very good job.
Per-surface blending MSVC functions run quite a bit faster
than their pure-asm counterparts (upto 55% faster for 16bit
ones), but the per-pixel blending runs somewhat slower than asm.
- BlitRGBtoRGBSurfaceAlphaMMX and BlitRGBtoRGBPixelAlphaMMX (and all
variants) can now also handle formats other than (A)RGB8888. Formats
like RGBA8888 and some quite exotic ones are allowed -- like
RAGB8888, or actually anything having channels aligned on 8bit
boundary and full 8bit alpha (for per-pixel alpha blending).
The performance cost of this change is virtually 0 for per-surface
alpha blending (no extra ops inside the loop) and a single non-MMX
op inside the loop for per-pixel blending. In testing, the per-pixel
alpha blending takes a ~2% performance hit, but it still runs much
faster than the current code in CVS. If necessary, a separate function
with this functionality can be made.
This code requires Processor Pack for VC6.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 15 Mar 2006 15:39:29 +0000 |
parents | c9b51268668f |
children | 782fd950bd46 a1b03ba2fcd0 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
13 Lesser General Public License for more details. |
0 | 14 |
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
21
diff
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20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
24 * Default cursor - it happens to be the Mac cursor, but could be anything */ | |
25 | |
26 #define DEFAULT_CWIDTH 16 | |
27 #define DEFAULT_CHEIGHT 16 | |
28 #define DEFAULT_CHOTX 0 | |
29 #define DEFAULT_CHOTY 0 | |
30 | |
31 /* Added a real MacOS cursor, at the request of Luc-Olivier de Charrière */ | |
32 #define USE_MACOS_CURSOR | |
33 | |
34 #ifdef USE_MACOS_CURSOR | |
35 | |
36 static unsigned char default_cdata[] = | |
37 { | |
38 0x00,0x00, | |
39 0x40,0x00, | |
40 0x60,0x00, | |
41 0x70,0x00, | |
42 0x78,0x00, | |
43 0x7C,0x00, | |
44 0x7E,0x00, | |
45 0x7F,0x00, | |
46 0x7F,0x80, | |
47 0x7C,0x00, | |
48 0x6C,0x00, | |
49 0x46,0x00, | |
50 0x06,0x00, | |
51 0x03,0x00, | |
52 0x03,0x00, | |
53 0x00,0x00 | |
54 }; | |
55 static unsigned char default_cmask[] = | |
56 { | |
57 0xC0,0x00, | |
58 0xE0,0x00, | |
59 0xF0,0x00, | |
60 0xF8,0x00, | |
61 0xFC,0x00, | |
62 0xFE,0x00, | |
63 0xFF,0x00, | |
64 0xFF,0x80, | |
65 0xFF,0xC0, | |
66 0xFF,0xE0, | |
67 0xFE,0x00, | |
68 0xEF,0x00, | |
69 0xCF,0x00, | |
70 0x87,0x80, | |
71 0x07,0x80, | |
72 0x03,0x00 | |
73 }; | |
74 | |
75 #else | |
76 | |
77 static unsigned char default_cdata[] = | |
78 { | |
79 0x00,0x00, | |
80 0x40,0x00, | |
81 0x60,0x00, | |
82 0x70,0x00, | |
83 0x78,0x00, | |
84 0x7C,0x00, | |
85 0x7E,0x00, | |
86 0x7F,0x00, | |
87 0x7F,0x80, | |
88 0x7C,0x00, | |
89 0x6C,0x00, | |
90 0x46,0x00, | |
91 0x06,0x00, | |
92 0x03,0x00, | |
93 0x03,0x00, | |
94 0x00,0x00 | |
95 }; | |
96 static unsigned char default_cmask[] = | |
97 { | |
98 0x40,0x00, | |
99 0xE0,0x00, | |
100 0xF0,0x00, | |
101 0xF8,0x00, | |
102 0xFC,0x00, | |
103 0xFE,0x00, | |
104 0xFF,0x00, | |
105 0xFF,0x80, | |
106 0xFF,0xC0, | |
107 0xFF,0x80, | |
108 0xFE,0x00, | |
109 0xEF,0x00, | |
110 0x4F,0x00, | |
111 0x07,0x80, | |
112 0x07,0x80, | |
113 0x03,0x00 | |
114 }; | |
115 | |
116 #endif /* TRUE_MACINTOSH_CURSOR */ |