19682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 29682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL - Simple DirectMedia Layer 39682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Copyright (C) 1997-2012 Sam Lantinga 49682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 59682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is free software; you can redistribute it and/or 69682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall modify it under the terms of the GNU Lesser General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2.1 of the License, or (at your option) any later version. 99682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is distributed in the hope that it will be useful, 119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall but WITHOUT ANY WARRANTY; without even the implied warranty of 129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Lesser General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Lesser General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free Software 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@libsdl.org 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_config.h" 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL.h" 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_events.h" 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "../../events/SDL_events_c.h" 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_x11video.h" 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* From the X server sources... */ 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define MAX_GAMMA 10.0 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define MIN_GAMMA (1.0/MAX_GAMMA) 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int X11_SetGammaNoLock(_THIS, float red, float green, float blue) 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#if SDL_VIDEO_DRIVER_X11_VIDMODE 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (use_vidmode >= 200) { 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(XF86VidModeGamma) gamma; 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Bool succeeded; 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Clamp the gamma values */ 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( red < MIN_GAMMA ) { 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.red = MIN_GAMMA; 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( red > MAX_GAMMA ) { 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.red = MAX_GAMMA; 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.red = red; 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( green < MIN_GAMMA ) { 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.green = MIN_GAMMA; 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( green > MAX_GAMMA ) { 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.green = MAX_GAMMA; 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.green = green; 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( blue < MIN_GAMMA ) { 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.blue = MIN_GAMMA; 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( blue > MAX_GAMMA ) { 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.blue = MAX_GAMMA; 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma.blue = blue; 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_GetAppState() & SDL_APPACTIVE ) { 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall succeeded = SDL_NAME(XF86VidModeSetGamma)(SDL_Display, SDL_Screen, &gamma); 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall XSync(SDL_Display, False); 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } else { 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma_saved[0] = gamma.red; 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma_saved[1] = gamma.green; 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma_saved[2] = gamma.blue; 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall succeeded = True; 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( succeeded ) { 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ++gamma_changed; 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return succeeded ? 0 : -1; 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Gamma correction not supported"); 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint X11_SetVidModeGamma(_THIS, float red, float green, float blue) 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int result; 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Lock_EventThread(); 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall result = X11_SetGammaNoLock(this, red, green, blue); 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Unlock_EventThread(); 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(result); 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int X11_GetGammaNoLock(_THIS, float *red, float *green, float *blue) 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#if SDL_VIDEO_DRIVER_X11_VIDMODE 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (use_vidmode >= 200) { 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(XF86VidModeGamma) gamma; 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (SDL_NAME(XF86VidModeGetGamma)(SDL_Display, SDL_Screen, &gamma)) { 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *red = gamma.red; 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *green = gamma.green; 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *blue = gamma.blue; 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return -1; 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallint X11_GetVidModeGamma(_THIS, float *red, float *green, float *blue) 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int result; 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Lock_EventThread(); 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall result = X11_GetGammaNoLock(this, red, green, blue); 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Unlock_EventThread(); 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(result); 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallvoid X11_SaveVidModeGamma(_THIS) 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Try to save the current gamma, otherwise disable gamma control */ 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( X11_GetGammaNoLock(this, 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]) < 0 ) { 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->SetGamma = 0; 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->GetGamma = 0; 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall gamma_changed = 0; 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallvoid X11_SwapVidModeGamma(_THIS) 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall float new_gamma[3]; 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( gamma_changed ) { 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall new_gamma[0] = gamma_saved[0]; 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall new_gamma[1] = gamma_saved[1]; 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall new_gamma[2] = gamma_saved[2]; 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall X11_GetGammaNoLock(this, &gamma_saved[0], &gamma_saved[1], &gamma_saved[2]); 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall X11_SetGammaNoLock(this, new_gamma[0], new_gamma[1], new_gamma[2]); 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 143