mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-12-15 06:30:49 +00:00
214 lines
5.4 KiB
C
214 lines
5.4 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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/*
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** WIN_GAMMA.C
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*/
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#include <assert.h>
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#include "../renderer/tr_local.h"
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#include "../qcommon/qcommon.h"
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#include "glw_win.h"
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#include "win_local.h"
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static unsigned short s_oldHardwareGamma[3][256];
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/*
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** WG_CheckHardwareGamma
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**
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** Determines if the underlying hardware supports the Win32 gamma correction API.
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*/
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void WG_CheckHardwareGamma( void )
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{
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HDC hDC;
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glConfig.deviceSupportsGamma = qfalse;
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if ( qwglSetDeviceGammaRamp3DFX )
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{
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glConfig.deviceSupportsGamma = qtrue;
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hDC = GetDC( GetDesktopWindow() );
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glConfig.deviceSupportsGamma = qwglGetDeviceGammaRamp3DFX( hDC, s_oldHardwareGamma );
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ReleaseDC( GetDesktopWindow(), hDC );
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return;
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}
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// non-3Dfx standalone drivers don't support gamma changes, period
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if ( glConfig.driverType == GLDRV_STANDALONE )
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{
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return;
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}
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if ( !r_ignorehwgamma->integer )
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{
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hDC = GetDC( GetDesktopWindow() );
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glConfig.deviceSupportsGamma = GetDeviceGammaRamp( hDC, s_oldHardwareGamma );
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ReleaseDC( GetDesktopWindow(), hDC );
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if ( glConfig.deviceSupportsGamma )
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{
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//
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// do a sanity check on the gamma values
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//
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if ( ( HIBYTE( s_oldHardwareGamma[0][255] ) <= HIBYTE( s_oldHardwareGamma[0][0] ) ) ||
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( HIBYTE( s_oldHardwareGamma[1][255] ) <= HIBYTE( s_oldHardwareGamma[1][0] ) ) ||
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( HIBYTE( s_oldHardwareGamma[2][255] ) <= HIBYTE( s_oldHardwareGamma[2][0] ) ) )
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{
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glConfig.deviceSupportsGamma = qfalse;
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ri.Printf( PRINT_WARNING, "WARNING: device has broken gamma support, generated gamma.dat\n" );
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}
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//
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// make sure that we didn't have a prior crash in the game, and if so we need to
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// restore the gamma values to at least a linear value
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//
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if ( ( HIBYTE( s_oldHardwareGamma[0][181] ) == 255 ) )
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{
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int g;
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ri.Printf( PRINT_WARNING, "WARNING: suspicious gamma tables, using linear ramp for restoration\n" );
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for ( g = 0; g < 255; g++ )
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{
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s_oldHardwareGamma[0][g] = g << 8;
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s_oldHardwareGamma[1][g] = g << 8;
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s_oldHardwareGamma[2][g] = g << 8;
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}
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}
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}
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}
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}
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/*
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void mapGammaMax( void ) {
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int i, j;
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unsigned short table[3][256];
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// try to figure out what win2k will let us get away with setting
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for ( i = 0 ; i < 256 ; i++ ) {
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if ( i >= 128 ) {
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table[0][i] = table[1][i] = table[2][i] = 0xffff;
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} else {
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table[0][i] = table[1][i] = table[2][i] = i<<9;
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}
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}
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for ( i = 0 ; i < 128 ; i++ ) {
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for ( j = i*2 ; j < 255 ; j++ ) {
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table[0][i] = table[1][i] = table[2][i] = j<<8;
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if ( !SetDeviceGammaRamp( glw_state.hDC, table ) ) {
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break;
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}
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}
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table[0][i] = table[1][i] = table[2][i] = i<<9;
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Com_Printf( "index %i max: %i\n", i, j-1 );
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}
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}
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*/
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/*
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** GLimp_SetGamma
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**
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** This routine should only be called if glConfig.deviceSupportsGamma is TRUE
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*/
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void GLimp_SetGamma( unsigned char red[256], unsigned char green[256], unsigned char blue[256] ) {
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unsigned short table[3][256];
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int i, j;
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int ret;
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OSVERSIONINFO vinfo;
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if ( !glConfig.deviceSupportsGamma || r_ignorehwgamma->integer || !glw_state.hDC ) {
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return;
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}
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//mapGammaMax();
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for ( i = 0; i < 256; i++ ) {
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table[0][i] = ( ( ( unsigned short ) red[i] ) << 8 ) | red[i];
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table[1][i] = ( ( ( unsigned short ) green[i] ) << 8 ) | green[i];
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table[2][i] = ( ( ( unsigned short ) blue[i] ) << 8 ) | blue[i];
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}
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// Win2K puts this odd restriction on gamma ramps...
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vinfo.dwOSVersionInfoSize = sizeof(vinfo);
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GetVersionEx( &vinfo );
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if ( vinfo.dwMajorVersion == 5 && vinfo.dwPlatformId == VER_PLATFORM_WIN32_NT ) {
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Com_DPrintf( "performing W2K gamma clamp.\n" );
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for ( j = 0 ; j < 3 ; j++ ) {
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for ( i = 0 ; i < 128 ; i++ ) {
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if ( table[j][i] > ( (128+i) << 8 ) ) {
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table[j][i] = (128+i) << 8;
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}
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}
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if ( table[j][127] > 254<<8 ) {
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table[j][127] = 254<<8;
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}
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}
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} else {
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Com_DPrintf( "skipping W2K gamma clamp.\n" );
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}
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// enforce constantly increasing
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for ( j = 0 ; j < 3 ; j++ ) {
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for ( i = 1 ; i < 256 ; i++ ) {
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if ( table[j][i] < table[j][i-1] ) {
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table[j][i] = table[j][i-1];
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}
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}
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}
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if ( qwglSetDeviceGammaRamp3DFX )
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{
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qwglSetDeviceGammaRamp3DFX( glw_state.hDC, table );
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}
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else
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{
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ret = SetDeviceGammaRamp( glw_state.hDC, table );
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if ( !ret ) {
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Com_Printf( "SetDeviceGammaRamp failed.\n" );
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}
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}
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}
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/*
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** WG_RestoreGamma
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*/
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void WG_RestoreGamma( void )
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{
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if ( glConfig.deviceSupportsGamma )
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{
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if ( qwglSetDeviceGammaRamp3DFX )
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{
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qwglSetDeviceGammaRamp3DFX( glw_state.hDC, s_oldHardwareGamma );
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}
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else
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{
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HDC hDC;
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hDC = GetDC( GetDesktopWindow() );
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SetDeviceGammaRamp( hDC, s_oldHardwareGamma );
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ReleaseDC( GetDesktopWindow(), hDC );
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}
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}
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}
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