Mercurial > sdl-ios-xcode
annotate src/hermes/mmx_main.asm @ 1295:c3e36ac8a94c
Date: Sun, 6 Mar 2005 17:06:20 +0100
From: Per Inge Mathisen
Subject: [SDL] Fullscreen refresh on win32
Windows has a terrible default for fullscreen 3D apps of 60mhz refresh
rate. This can be fixed by the user by going into his driver's
control panel and forcing the refresh rate higher. However, this not a
very user friendly way about it, and in any case SDL contains no code
that could figure out this that condition has afflicted the user.
So the question is, could SDL fix this for the user? It is possible
under Windows to request a higher refresh rate. The danger is of
course that if the user has an old monitor, and you request a too high
refresh rate, the monitor could be damaged. However, I believe there
might be a way around that: Check before switching what refresh rate
the user's desktop runs in, and if our fullscreen dimensions are equal
or less than those of the desktop, use the higher refresh rate of 60
and the desktop rate.
Since most users run their desktops in the same or higher resolution
something sane, this should fix this problem for most users.
Thoughts?
An alternative is to add an SDL_GL_GetAttribute(SDL_GL_REFRESH_RATE)
option so that programs can bitch at their users at their own
convenience.
- Per
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 30 Jan 2006 06:56:10 +0000 |
parents | 2d6dc7de1145 |
children | 393092a3ebf6 |
rev | line source |
---|---|
0 | 1 ; |
2 ; mmx format converter main loops for HERMES | |
3 ; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk) | |
4 ; This source code is licensed under the GNU LGPL | |
5 ; | |
6 ; Please refer to the file COPYING.LIB contained in the distribution for | |
7 ; licensing conditions | |
8 ; | |
9 | |
10 BITS 32 | |
11 | |
12 GLOBAL _ConvertMMX | |
13 GLOBAL _mmxreturn | |
14 | |
15 SECTION .text | |
16 | |
17 ;; _ConvertMMX: | |
18 ;; [ESP+8] ConverterInfo* | |
19 ;; -------------------------------------------------------------------------- | |
20 ;; ConverterInfo (ebp+..) | |
21 ;; 0: void *s_pixels | |
22 ;; 4: int s_width | |
23 ;; 8: int s_height | |
24 ;; 12: int s_add | |
25 ;; 16: void *d_pixels | |
26 ;; 20: int d_width | |
27 ;; 24: int d_height | |
28 ;; 28: int d_add | |
29 ;; 32: void (*converter_function)() | |
30 ;; 36: int32 *lookup | |
31 | |
32 _ConvertMMX: | |
33 push ebp | |
34 mov ebp,esp | |
35 | |
36 ; Save the registers used by the blitters, necessary for optimized code | |
37 pusha | |
38 | |
39 mov eax,[ebp+8] | |
40 | |
41 cmp dword [eax+4],BYTE 0 | |
42 je endconvert | |
43 | |
44 mov ebp,eax | |
45 | |
46 mov esi,[ebp+0] | |
47 mov edi,[ebp+16] | |
48 | |
49 y_loop: | |
50 mov ecx,[ebp+4] | |
51 | |
52 jmp [ebp+32] | |
53 | |
54 _mmxreturn: | |
55 add esi,[ebp+12] | |
56 add edi,[ebp+28] | |
57 | |
58 dec dword [ebp+8] | |
59 jnz y_loop | |
60 | |
61 | |
62 ; Restore the registers used by the blitters, necessary for optimized code | |
63 popa | |
64 | |
65 pop ebp | |
66 | |
67 endconvert: | |
68 emms | |
69 | |
70 ret | |
71 | |
1199
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
72 %ifidn __OUTPUT_FORMAT__,elf |
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
73 section .note.GNU-stack noalloc noexec nowrite progbits |
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
74 %endif |