mirror of
https://github.com/ioquake/jedi-academy.git
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141 lines
3.4 KiB
C++
141 lines
3.4 KiB
C++
/*
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** WIN_GAMMA.C
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*/
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// leave this as first line for PCH reasons...
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//
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#include "../server/exe_headers.h"
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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 ( !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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VID_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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VID_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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** 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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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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** 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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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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