Mercurial > sdl-ios-xcode
annotate src/video/x11/SDL_x11gamma.c @ 1747:e75d0cbcf3c8
(none)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 29 Apr 2006 17:56:06 +0000 |
| parents | 3ba88cb7eb1b |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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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 | |
|
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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 |
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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 | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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Sam Lantinga <slouken@libsdl.org>
parents:
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15 You should have received a copy of the GNU Lesser General Public |
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c9b51268668f
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Sam Lantinga <slouken@libsdl.org>
parents:
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16 License along with this library; if not, write to the Free Software |
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #include "SDL.h" | |
| 25 #include "SDL_events.h" | |
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26 #include "../../events/SDL_events_c.h" |
| 0 | 27 #include "SDL_x11video.h" |
| 28 | |
| 29 /* From the X server sources... */ | |
| 30 #define MAX_GAMMA 10.0 | |
| 31 #define MIN_GAMMA (1.0/MAX_GAMMA) | |
| 32 | |
| 33 static int X11_SetGammaNoLock(_THIS, float red, float green, float blue) | |
| 34 { | |
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35 #if SDL_VIDEO_DRIVER_X11_VIDMODE |
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36 if (use_vidmode >= 200) { |
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37 SDL_NAME(XF86VidModeGamma) gamma; |
| 0 | 38 Bool succeeded; |
| 39 | |
| 40 /* Clamp the gamma values */ | |
| 41 if ( red < MIN_GAMMA ) { | |
| 42 gamma.red = MIN_GAMMA; | |
| 43 } else | |
| 44 if ( red > MAX_GAMMA ) { | |
| 45 gamma.red = MAX_GAMMA; | |
| 46 } else { | |
| 47 gamma.red = red; | |
| 48 } | |
| 49 if ( green < MIN_GAMMA ) { | |
| 50 gamma.green = MIN_GAMMA; | |
| 51 } else | |
| 52 if ( green > MAX_GAMMA ) { | |
| 53 gamma.green = MAX_GAMMA; | |
| 54 } else { | |
| 55 gamma.green = green; | |
| 56 } | |
| 57 if ( blue < MIN_GAMMA ) { | |
| 58 gamma.blue = MIN_GAMMA; | |
| 59 } else | |
| 60 if ( blue > MAX_GAMMA ) { | |
| 61 gamma.blue = MAX_GAMMA; | |
| 62 } else { | |
| 63 gamma.blue = blue; | |
| 64 } | |
| 65 if ( SDL_GetAppState() & SDL_APPACTIVE ) { | |
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66 succeeded = SDL_NAME(XF86VidModeSetGamma)(SDL_Display, SDL_Screen, &gamma); |
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Updated dynamic X11 code. See details in Bugzilla #170.
Ryan C. Gordon <icculus@icculus.org>
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67 XSync(SDL_Display, False); |
| 0 | 68 } else { |
| 69 gamma_saved[0] = gamma.red; | |
| 70 gamma_saved[1] = gamma.green; | |
| 71 gamma_saved[2] = gamma.blue; | |
| 72 succeeded = True; | |
| 73 } | |
| 74 if ( succeeded ) { | |
| 75 ++gamma_changed; | |
| 76 } | |
| 77 return succeeded ? 0 : -1; | |
| 78 } | |
| 79 #endif | |
| 80 SDL_SetError("Gamma correction not supported"); | |
| 81 return -1; | |
| 82 } | |
| 83 int X11_SetVidModeGamma(_THIS, float red, float green, float blue) | |
| 84 { | |
| 85 int result; | |
| 86 | |
| 87 SDL_Lock_EventThread(); | |
| 88 result = X11_SetGammaNoLock(this, red, green, blue); | |
| 89 SDL_Unlock_EventThread(); | |
| 90 | |
| 91 return(result); | |
| 92 } | |
| 93 | |
| 94 static int X11_GetGammaNoLock(_THIS, float *red, float *green, float *blue) | |
| 95 { | |
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parents:
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96 #if SDL_VIDEO_DRIVER_X11_VIDMODE |
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97 if (use_vidmode >= 200) { |
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98 SDL_NAME(XF86VidModeGamma) gamma; |
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99 if (SDL_NAME(XF86VidModeGetGamma)(SDL_Display, SDL_Screen, &gamma)) { |
| 0 | 100 *red = gamma.red; |
| 101 *green = gamma.green; | |
| 102 *blue = gamma.blue; | |
| 103 return 0; | |
| 104 } | |
| 105 return -1; | |
| 106 } | |
| 107 #endif | |
| 108 return -1; | |
| 109 } | |
| 110 int X11_GetVidModeGamma(_THIS, float *red, float *green, float *blue) | |
| 111 { | |
| 112 int result; | |
| 113 | |
| 114 SDL_Lock_EventThread(); | |
| 115 result = X11_GetGammaNoLock(this, red, green, blue); | |
| 116 SDL_Unlock_EventThread(); | |
| 117 | |
| 118 return(result); | |
| 119 } | |
| 120 | |
| 121 void X11_SaveVidModeGamma(_THIS) | |
| 122 { | |
| 123 /* Try to save the current gamma, otherwise disable gamma control */ | |
| 124 if ( X11_GetGammaNoLock(this, | |
| 125 &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]) < 0 ) { | |
| 126 this->SetGamma = 0; | |
| 127 this->GetGamma = 0; | |
| 128 } | |
| 129 gamma_changed = 0; | |
| 130 } | |
| 131 void X11_SwapVidModeGamma(_THIS) | |
| 132 { | |
| 133 float new_gamma[3]; | |
| 134 | |
| 135 if ( gamma_changed ) { | |
| 136 new_gamma[0] = gamma_saved[0]; | |
| 137 new_gamma[1] = gamma_saved[1]; | |
| 138 new_gamma[2] = gamma_saved[2]; | |
| 139 X11_GetGammaNoLock(this, &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]); | |
| 140 X11_SetGammaNoLock(this, new_gamma[0], new_gamma[1], new_gamma[2]); | |
| 141 } | |
| 142 } |