74 lines
1.3 KiB
C++
74 lines
1.3 KiB
C++
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/*
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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 "../game/q_shared.h"
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#include "../renderer/tr_local.h"
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#include "../qcommon/qcommon.h"
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#include "win_local.h"
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#if defined(_XBOX)
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#include "glw_win_dx8.h"
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#endif
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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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glConfig.deviceSupportsGamma = qtrue;
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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( float g ) {
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#if defined(_GAMECUBE)
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GXGamma gamma = GX_GM_1_0;
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if (g >= 2.2f)
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{
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gamma = GX_GM_2_2;
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}
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else if (g >= 1.7f)
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{
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gamma = GX_GM_1_7;
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}
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GXSetDispCopyGamma(gamma);
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#elif defined(_XBOX)
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const int maxval = 255;
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D3DGAMMARAMP ramp;
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for ( int i = 0; i < 256; i++ )
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{
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int inf;
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if ( g == 1 ) {
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inf = maxval * i / 255.0f;
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} else {
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inf = maxval * pow ( i/255.0f, 1.0f / g ) + 0.5f;
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}
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if (inf < 0) {
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inf = 0;
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}
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if (inf > maxval) {
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inf = maxval;
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}
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ramp.red[i] = inf;
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ramp.green[i] = inf;
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ramp.blue[i] = inf;
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}
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glw_state->device->SetGammaRamp(D3DSGR_CALIBRATE, &ramp);
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#endif
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}
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