--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GammaControl.cpp	Fri Oct 05 16:07:14 2012 +0200
@@ -0,0 +1,183 @@
+#include <string>
+
+#include "GammaControl.h"
+#include "Render.h"
+#include "OSInfo.h"
+
+#include "mm7_data.h"
+
+
+
+//----- (0044F324) --------------------------------------------------------
+void GammaController::GetRamp()
+{
+  if (pGammaControl)
+    ErrD3D(pGammaControl->GetGammaRamp(0, &pDefaultRamp));
+  else
+    MessageBoxW(nullptr, L"Gamma control not active", L"E:\\WORK\\MSDEV\\MM7\\MM7\\Code\\GammaControl.cpp:83", 0);
+}
+
+//----- (0044F377) --------------------------------------------------------
+double GammaController::_44F377(DDGAMMARAMP *a1)
+{
+  double v2; // st7@1
+  unsigned __int16 *v3; // ecx@1
+  double v4; // st6@2
+  double result; // st7@7
+  signed int v6; // [sp+0h] [bp-8h]@1
+  signed int v7; // [sp+4h] [bp-4h]@1
+
+  v7 = 0;
+  v2 = 0.0;
+  v6 = 256;
+  v3 = a1->green;
+  do
+  {
+    v4 = ((double)*(v3 - 256) + (double)v3[256] + (double)*v3) * 0.000015259022 * 0.33333334;
+    if ( v4 == 0.0 )
+      --v6;
+    else
+      v2 = v2 + (double)v7 * 0.0039215689 / v4;
+    ++v7;
+    ++v3;
+  }
+  while ( v7 < 256 );
+  if ( v6 )
+    result = v2 / (double)v6;
+  else
+    result = 1.0;
+  return result;
+}
+
+//----- (0044F408) --------------------------------------------------------
+void GammaController::SetGammaRamp(DDGAMMARAMP *pRamp)
+{
+  if (pGammaControl)
+    ErrD3D(pGammaControl->SetGammaRamp(0, pRamp));
+  else
+    MessageBoxW(nullptr, L"Gamma control not active", L"E:\\WORK\\MSDEV\\MM7\\MM7\\Code\\GammaControl.cpp:120", 0);
+}
+
+//----- (0044F45B) --------------------------------------------------------
+int GammaController::InitGammaRamp(DDGAMMARAMP *pRamp)
+{
+  unsigned __int16 *v2; // esi@1
+  double v3; // st7@2
+  signed __int64 v4; // qax@3
+  signed int v6; // [sp+Ch] [bp-4h]@1
+
+  v6 = 0;
+  v2 = pRamp->green;
+  do
+  {
+    v3 = (double)v6 * 0.0039215689 * this->fGamma;
+    if ( v3 >= 1.0 || (v4 = (signed __int64)(v3 * 65535.0), (signed int)v4 > 65535) )
+      goto LABEL_12;
+    if ( (signed int)v4 < 0 )
+    {
+      LODWORD(v4) = 0;
+      goto LABEL_8;
+    }
+    if ( (signed int)v4 > 65535 )
+LABEL_12:
+      LODWORD(v4) = 65535;
+LABEL_8:
+    ++v6;
+    v2[256] = v4;
+    *v2 = v4;
+    *(v2 - 256) = v4;
+    ++v2;
+  }
+  while ( v6 < 256 );
+  return v4;
+}
+
+//----- (0044F4D9) --------------------------------------------------------
+void GammaController::Initialize(float gamma)
+{
+  GammaController *v2; // esi@1
+  double v3; // st7@3
+  double v4; // st6@4
+
+  v2 = this;
+  if (pVersion->pVersionInfo.dwPlatformId != VER_PLATFORM_WIN32_NT ||
+      pVersion->pVersionInfo.dwMajorVersion != 4)
+  {
+    InitializeFromSurface(pRenderer->pFrontBuffer4);
+    v3 = 2.8;
+    if ( gamma <= 2.8f )
+      v4 = gamma;
+    else
+      v4 = 2.8;
+    if ( v4 >= 0.1f )
+    {
+      if ( gamma <= 2.8f )
+        v3 = gamma;
+    }
+    else
+    {
+      v3 = 0.1;
+    }
+    v2->fGamma = v3;
+    InitGammaRamp(&v2->field_60C);
+    SetGammaRamp(&v2->field_60C);
+  }
+}
+
+
+//----- (0044F2B2) --------------------------------------------------------
+bool GammaController::IsGammaSupported()
+{
+  bool result; // eax@3
+  HRESULT v1; // eax@4
+
+  if ( pVersion->pVersionInfo.dwPlatformId != VER_PLATFORM_WIN32_NT || pVersion->pVersionInfo.dwMajorVersion != 4 )
+  {
+    DDCAPS halCaps; // [sp+0h] [bp-180h]@4
+    memset(&halCaps, 0, sizeof(DDCAPS));
+    halCaps.dwSize = sizeof(DDCAPS);
+
+    ErrD3D(pRenderer->pDirectDraw4->GetCaps(&halCaps, 0));
+    return (halCaps.dwCaps2 >> 17) & 1;
+  }
+  else
+    return false;
+}
+
+
+
+//----- (0044F215) --------------------------------------------------------
+GammaController::GammaController()
+{
+  static float flt_4D8670_default_gamma = 1.0f;
+
+  pGammaControl = nullptr;
+  fGamma = flt_4D8670_default_gamma;
+}
+
+
+
+//----- (0044F24B) --------------------------------------------------------
+void GammaController::InitializeFromSurface(IDirectDrawSurface4 *a2)
+{
+  GammaController *v2; // esi@1
+  IDirectDrawGammaControl **v3; // edi@1
+  IDirectDrawGammaControl *v4; // eax@1
+
+  v2 = this;
+  v3 = &this->pGammaControl;
+  this->pSurface = a2;
+  v4 = this->pGammaControl;
+  if ( v4 )
+  {
+    v4->Release();
+    *v3 = 0;
+  }
+  if ( IsGammaSupported() )
+  {
+    ErrD3D(a2->QueryInterface(IID_IDirectDrawGammaControl, (LPVOID *)v3));
+    GetRamp();
+    memcpy(&v2->field_60C, &v2->pDefaultRamp, 0x600u);
+    fGamma = _44F377(&v2->field_60C);
+  }
+}
\ No newline at end of file