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122 lines
2.6 KiB
C++
122 lines
2.6 KiB
C++
#include "GammaTable.h"
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// Include windows gamma functions
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#ifdef _WIN32
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#include "winsani_in.h"
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#include <windows.h>
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#include "winuser.h"
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#include "winsani_out.h"
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#endif
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GammaTable::GammaTable()
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{
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this->mSlope = 1.0f;
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//this->InitializeToFlat(); // will cause @linux client to crash at start
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this->mDirect3DMode = false;
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}
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GammaTable::~GammaTable()
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{
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}
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float GammaTable::GetGammaSlope() const
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{
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return this->mSlope;
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}
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void GammaTable::InitializeToFlat()
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{
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this->mSlope = 1.0f;
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for(int j = 0; j < 3; j++)
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{
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for(int i = 0; i < 256; i++)
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{
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int theBaseOffset = j*256 + i;
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uint8 theNewColor = (uint8)i;
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uint16 theNewWord = theNewColor << 8;
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((uint16*)this->mBaseData)[theBaseOffset] = theNewWord;
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((uint16*)this->mSlopeData)[theBaseOffset] = theNewWord;
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}
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}
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}
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#ifdef _WIN32
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bool GammaTable::InitializeFromVideoState()
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{
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bool theSuccess = false;
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if(!this->mDirect3DMode)
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{
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HDC theDC = GetDC(NULL); // evil
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if(theDC != 0)
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{
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// Read current settings in
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if(GetDeviceGammaRamp(theDC, this->mBaseData) == TRUE) // more evil
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{
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// Copy to base data also
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memcpy(this->mSlopeData, this->mBaseData, kGammaTableSize*sizeof(char));
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// This may not actually be one, but we treat one as the base state always
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this->mSlope = 1.0f;
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theSuccess = true;
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}
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if(!ReleaseDC(NULL, theDC))
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{
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// emit error about leak
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}
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}
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}
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return theSuccess;
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}
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bool GammaTable::InitializeToVideoState()
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{
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bool theSuccess = false;
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if(!this->mDirect3DMode)
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{
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HDC theDC = GetDC(NULL);
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if(theDC != 0)
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{
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// Multi-monitor support returns false for some reason, even though it seems to work
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#define SM_CMONITORS 80
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bool theIgnoreErrorCode = (GetSystemMetrics(SM_CMONITORS) > 1);
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bool theSetGammaRamp = (SetDeviceGammaRamp(theDC, this->mSlopeData) == TRUE);
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// Restore original gamma ramp
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if(theSetGammaRamp || theIgnoreErrorCode)
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{
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theSuccess = true;
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}
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if(!ReleaseDC(NULL, theDC))
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{
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// emit error about leak
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}
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}
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}
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return theSuccess;
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}
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#endif
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void GammaTable::ProcessSlope(float inSlope)
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{
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this->mSlope = inSlope;
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// Steepen and saturate, ala Q3
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uint8 kMaxValue = uint8(-1);
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for(int j = 0; j < 3; j++)
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{
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for(int i = 0; i < 256; i++)
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{
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int theBaseOffset = j*256 + i;
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uint16 theWord = ((uint16*)this->mBaseData)[theBaseOffset];
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uint8 theBaseColor = (theWord & 0xFF00) >> 8;
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uint8 theNewColor = (uint8)min(theBaseColor*inSlope, (float)kMaxValue);
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uint16 theNewWord = theNewColor << 8;
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((uint16*)this->mSlopeData)[theBaseOffset] = theNewWord;
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}
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}
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}
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