From 425decdf7e9284d15aa726e3ae96b9942fb0e3ea Mon Sep 17 00:00:00 2001 From: IronClawTrem Date: Sun, 16 Feb 2020 03:40:06 +0000 Subject: create tremded branch --- src/sdl/sdl_gamma.cpp | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 src/sdl/sdl_gamma.cpp (limited to 'src/sdl/sdl_gamma.cpp') diff --git a/src/sdl/sdl_gamma.cpp b/src/sdl/sdl_gamma.cpp new file mode 100644 index 0000000..372fdf2 --- /dev/null +++ b/src/sdl/sdl_gamma.cpp @@ -0,0 +1,100 @@ +/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. +Copyright (C) 2000-2013 Darklegion Development +Copyright (C) 2015-2019 GrangerHub + +This file is part of Tremulous. + +Tremulous is free software; you can redistribute it +and/or modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 3 of the License, +or (at your option) any later version. + +Tremulous is distributed in the hope that it will be +useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with Tremulous; if not, see + +=========================================================================== +*/ + +#ifdef _WIN32 +#include +#endif + +#ifdef USE_LOCAL_HEADERS +# include "SDL.h" +#else +# include +#endif + +#include "qcommon/cvar.h" +#include "qcommon/qcommon.h" +#include "renderercommon/tr_common.h" + +extern SDL_Window *SDL_window; + +/* +================= +GLimp_SetGamma +================= +*/ +void GLimp_SetGamma( unsigned char red[256], unsigned char green[256], unsigned char blue[256] ) +{ + Uint16 table[3][256]; + int i, j; + + if( !glConfig.deviceSupportsGamma || r_ignorehwgamma->integer > 0 ) + return; + + for (i = 0; i < 256; i++) + { + table[0][i] = ( ( ( Uint16 ) red[i] ) << 8 ) | red[i]; + table[1][i] = ( ( ( Uint16 ) green[i] ) << 8 ) | green[i]; + table[2][i] = ( ( ( Uint16 ) blue[i] ) << 8 ) | blue[i]; + } + +#ifdef _WIN32 + // Win2K and newer put this odd restriction on gamma ramps... + { + OSVERSIONINFO vinfo; + + vinfo.dwOSVersionInfoSize = sizeof( vinfo ); + GetVersionEx( &vinfo ); + if( vinfo.dwMajorVersion >= 5 && vinfo.dwPlatformId == VER_PLATFORM_WIN32_NT ) + { + ri.Printf( PRINT_DEVELOPER, "performing gamma clamp.\n" ); + for( j = 0 ; j < 3 ; j++ ) + { + for( i = 0 ; i < 128 ; i++ ) + { + if( table[ j ] [ i] > ( ( 128 + i ) << 8 ) ) + table[ j ][ i ] = ( 128 + i ) << 8; + } + + if( table[ j ] [127 ] > 254 << 8 ) + table[ j ][ 127 ] = 254 << 8; + } + } + } +#endif + + // enforce constantly increasing + for (j = 0; j < 3; j++) + { + for (i = 1; i < 256; i++) + { + if (table[j][i] < table[j][i-1]) + table[j][i] = table[j][i-1]; + } + } + + if (SDL_SetWindowGammaRamp(SDL_window, table[0], table[1], table[2]) < 0) + { + ri.Printf( PRINT_DEVELOPER, "SDL_SetWindowGammaRamp() failed: %s\n", SDL_GetError() ); + } +} -- cgit