Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gamma.c @ 937:1e6366bde299
Date: Tue, 27 Jul 2004 17:14:00 +0200
From: "Eckhard Stolberg"
Subject: Controller names in SDL for Windows
I'm working on an Atari 2600 emulator for different systems that uses
the SDL. Some time ago someone created an adaptor that lets you use
your old Atari controllers with your computer through the USB port.
Some of the Atari controllers require special handling by the emulator,
so it would be nice, if it would be possible to detect if any of the
controllers connected to the computer is this adaptor.
SDL would allow that with the SDL_JoystickName function, but unfortunately
it doesn't work properly on Windows. On Linux and MacOSX this function
returns the name of the controller, but on Windows you'll only get the
name of the joystick driver. Most joysticks nowadays use the generic
Microsoft driver, so they all return the same name.
In an old MSDN article
(http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dnarinput/html/msdn_extdirect.asp)
Microsoft describes how to read out the OEM controller names from the registry.
I have implemented this for the SDL controller handler on Windows,
and now reading the joystick name works properly there too.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 21 Aug 2004 03:45:58 +0000 |
parents | b8d311d90021 |
children | 045f186426e1 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
6 modify it under the terms of the GNU Library General Public | |
7 License as published by the Free Software Foundation; either | |
8 version 2 of the License, or (at your option) any later version. | |
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 | |
13 Library General Public License for more details. | |
14 | |
15 You should have received a copy of the GNU Library General Public | |
16 License along with this library; if not, write to the Free | |
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 #ifdef SAVE_RCSID | |
24 static char rcsid = | |
25 "@(#) $Id$"; | |
26 #endif | |
27 | |
28 #include "SDL.h" | |
29 #include "SDL_events.h" | |
30 #include "SDL_events_c.h" | |
31 #include "SDL_x11video.h" | |
32 | |
33 /* From the X server sources... */ | |
34 #define MAX_GAMMA 10.0 | |
35 #define MIN_GAMMA (1.0/MAX_GAMMA) | |
36 | |
37 static int X11_SetGammaNoLock(_THIS, float red, float green, float blue) | |
38 { | |
39 #ifdef XFREE86_VMGAMMA | |
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40 if (use_vidmode >= 200) { |
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41 SDL_NAME(XF86VidModeGamma) gamma; |
0 | 42 Bool succeeded; |
43 | |
44 /* Clamp the gamma values */ | |
45 if ( red < MIN_GAMMA ) { | |
46 gamma.red = MIN_GAMMA; | |
47 } else | |
48 if ( red > MAX_GAMMA ) { | |
49 gamma.red = MAX_GAMMA; | |
50 } else { | |
51 gamma.red = red; | |
52 } | |
53 if ( green < MIN_GAMMA ) { | |
54 gamma.green = MIN_GAMMA; | |
55 } else | |
56 if ( green > MAX_GAMMA ) { | |
57 gamma.green = MAX_GAMMA; | |
58 } else { | |
59 gamma.green = green; | |
60 } | |
61 if ( blue < MIN_GAMMA ) { | |
62 gamma.blue = MIN_GAMMA; | |
63 } else | |
64 if ( blue > MAX_GAMMA ) { | |
65 gamma.blue = MAX_GAMMA; | |
66 } else { | |
67 gamma.blue = blue; | |
68 } | |
69 if ( SDL_GetAppState() & SDL_APPACTIVE ) { | |
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70 succeeded = SDL_NAME(XF86VidModeSetGamma)(SDL_Display, SDL_Screen, &gamma); |
0 | 71 XSync(SDL_Display, False); |
72 } else { | |
73 gamma_saved[0] = gamma.red; | |
74 gamma_saved[1] = gamma.green; | |
75 gamma_saved[2] = gamma.blue; | |
76 succeeded = True; | |
77 } | |
78 if ( succeeded ) { | |
79 ++gamma_changed; | |
80 } | |
81 return succeeded ? 0 : -1; | |
82 } | |
83 #endif | |
84 SDL_SetError("Gamma correction not supported"); | |
85 return -1; | |
86 } | |
87 int X11_SetVidModeGamma(_THIS, float red, float green, float blue) | |
88 { | |
89 int result; | |
90 | |
91 SDL_Lock_EventThread(); | |
92 result = X11_SetGammaNoLock(this, red, green, blue); | |
93 SDL_Unlock_EventThread(); | |
94 | |
95 return(result); | |
96 } | |
97 | |
98 static int X11_GetGammaNoLock(_THIS, float *red, float *green, float *blue) | |
99 { | |
100 #ifdef XFREE86_VMGAMMA | |
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101 if (use_vidmode >= 200) { |
292
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102 SDL_NAME(XF86VidModeGamma) gamma; |
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103 if (SDL_NAME(XF86VidModeGetGamma)(SDL_Display, SDL_Screen, &gamma)) { |
0 | 104 *red = gamma.red; |
105 *green = gamma.green; | |
106 *blue = gamma.blue; | |
107 return 0; | |
108 } | |
109 return -1; | |
110 } | |
111 #endif | |
112 return -1; | |
113 } | |
114 int X11_GetVidModeGamma(_THIS, float *red, float *green, float *blue) | |
115 { | |
116 int result; | |
117 | |
118 SDL_Lock_EventThread(); | |
119 result = X11_GetGammaNoLock(this, red, green, blue); | |
120 SDL_Unlock_EventThread(); | |
121 | |
122 return(result); | |
123 } | |
124 | |
125 void X11_SaveVidModeGamma(_THIS) | |
126 { | |
127 /* Try to save the current gamma, otherwise disable gamma control */ | |
128 if ( X11_GetGammaNoLock(this, | |
129 &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]) < 0 ) { | |
130 this->SetGamma = 0; | |
131 this->GetGamma = 0; | |
132 } | |
133 gamma_changed = 0; | |
134 } | |
135 void X11_SwapVidModeGamma(_THIS) | |
136 { | |
137 float new_gamma[3]; | |
138 | |
139 if ( gamma_changed ) { | |
140 new_gamma[0] = gamma_saved[0]; | |
141 new_gamma[1] = gamma_saved[1]; | |
142 new_gamma[2] = gamma_saved[2]; | |
143 X11_GetGammaNoLock(this, &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]); | |
144 X11_SetGammaNoLock(this, new_gamma[0], new_gamma[1], new_gamma[2]); | |
145 } | |
146 } |