1 files changed, 309 insertions, 0 deletions
diff --git a/hw/xwin/winengine.c b/hw/xwin/winengine.c
new file mode 100644
index 000000000..aff90bdaf
--- /dev/null
+++ b/hw/xwin/winengine.c
@@ -0,0 +1,309 @@
+/*
+ *Copyright (C) 1994-2001 The XFree86 Project, Inc. All Rights Reserved.
+ *
+ *Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ *"Software"), to deal in the Software without restriction, including
+ *without limitation the rights to use, copy, modify, merge, publish,
+ *distribute, sublicense, and/or sell copies of the Software, and to
+ *permit persons to whom the Software is furnished to do so, subject to
+ *the following conditions:
+ *
+ *The above copyright notice and this permission notice shall be
+ *included in all copies or substantial portions of the Software.
+ *
+ *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *NONINFRINGEMENT. IN NO EVENT SHALL THE XFREE86 PROJECT BE LIABLE FOR
+ *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *Except as contained in this notice, the name of the XFree86 Project
+ *shall not be used in advertising or otherwise to promote the sale, use
+ *or other dealings in this Software without prior written authorization
+ *from the XFree86 Project.
+ *
+ * Authors:	Harold L Hunt II
+ */
+/* $XFree86: xc/programs/Xserver/hw/xwin/winengine.c,v 1.4 2003/02/12 15:01:38 alanh Exp $ */
+
+#include "win.h"
+
+
+/*
+ * Detect engines supported by current Windows version
+ * DirectDraw version and hardware
+ */
+
+void
+winDetectSupportedEngines ()
+{
+  OSVERSIONINFO		osvi;
+
+  /* Initialize the engine support flags */
+  g_dwEnginesSupported = WIN_SERVER_SHADOW_GDI;
+
+#if WIN_NATIVE_GDI_SUPPORT
+  g_dwEnginesSupported |= WIN_SERVER_NATIVE_GDI;
+#endif
+
+  /* Get operating system version information */
+  ZeroMemory (&osvi, sizeof (osvi));
+  osvi.dwOSVersionInfoSize = sizeof (osvi);
+  GetVersionEx (&osvi);
+
+  /* Branch on platform ID */
+  switch (osvi.dwPlatformId)
+    {
+    case VER_PLATFORM_WIN32_NT:
+      /* Engine 4 is supported on NT only */
+      ErrorF ("winDetectSupportedEngines - Windows NT/2000/XP\n");
+      break;
+
+    case VER_PLATFORM_WIN32_WINDOWS:
+      /* Engine 4 is supported on NT only */
+      ErrorF ("winDetectSupportedEngines - Windows 95/98/Me\n");
+      break;
+    }
+
+  /* Do we have DirectDraw? */
+  if (g_hmodDirectDraw != NULL)
+    {
+      LPDIRECTDRAW	lpdd = NULL;
+      LPDIRECTDRAW4	lpdd4 = NULL;
+      HRESULT		ddrval;
+
+      /* Was the DirectDrawCreate function found? */
+      if (g_fpDirectDrawCreate == NULL)
+	{
+	  /* No DirectDraw support */
+	  return;
+	}
+
+      /* DirectDrawCreate exists, try to call it */
+      /* Create a DirectDraw object, store the address at lpdd */
+      ddrval = (*g_fpDirectDrawCreate) (NULL,
+					(void**) &lpdd,
+					NULL);
+      if (FAILED (ddrval))
+	{
+	  /* No DirectDraw support */
+	  ErrorF ("winDetectSupportedEngines - DirectDraw not installed\n");
+	  return;
+	}
+      else
+	{
+	  /* We have DirectDraw */
+	  ErrorF ("winDetectSupportedEngines - DirectDraw installed\n");
+	  g_dwEnginesSupported |= WIN_SERVER_SHADOW_DD;
+
+	  /* Allow PrimaryDD engine if NT */
+	  if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT)
+	    {
+	      g_dwEnginesSupported |= WIN_SERVER_PRIMARY_DD;
+	      ErrorF ("winDetectSupportedEngines - Allowing PrimaryDD\n");
+	    }
+	}
+      
+      /* Try to query for DirectDraw4 interface */
+      ddrval = IDirectDraw_QueryInterface (lpdd,
+					   &IID_IDirectDraw4,
+					   (LPVOID*) &lpdd4);
+      if (SUCCEEDED (ddrval))
+	{
+	  /* We have DirectDraw4 */
+	  ErrorF ("winDetectSupportedEngines - DirectDraw4 installed\n");
+	  g_dwEnginesSupported |= WIN_SERVER_SHADOW_DDNL;
+	}
+
+      /* Cleanup DirectDraw interfaces */
+      if (lpdd4 != NULL)
+	IDirectDraw_Release (lpdd4);
+      if (lpdd != NULL)
+	IDirectDraw_Release (lpdd);
+    }
+
+  ErrorF ("winDetectSupportedEngines - Returning, supported engines %08x\n",
+	  g_dwEnginesSupported);
+}
+
+
+/*
+ * Set the engine type, depending on the engines
+ * supported for this screen, and whether the user
+ * suggested an engine type
+ */
+
+Bool
+winSetEngine (ScreenPtr pScreen)
+{
+  winScreenPriv(pScreen);
+  winScreenInfo		*pScreenInfo = pScreenPriv->pScreenInfo;
+  HDC			hdc;
+  DWORD			dwBPP;
+
+  /* Get a DC */
+  hdc = GetDC (NULL);
+  if (hdc == NULL)
+    {
+      ErrorF ("winSetEngine - Couldn't get an HDC\n");
+      return FALSE;
+    }
+
+  /*
+   * pScreenInfo->dwBPP may be 0 to indicate that the current screen
+   * depth is to be used.  Thus, we must query for the current display
+   * depth here.
+   */
+  dwBPP = GetDeviceCaps (hdc, BITSPIXEL);
+
+  /* Release the DC */
+  ReleaseDC (NULL, hdc);
+  hdc = NULL;
+
+  /* ShadowGDI is the only engine that supports windowed PseudoColor */
+  if (dwBPP == 8 && !pScreenInfo->fFullScreen)
+    {
+      ErrorF ("winSetEngine - Windowed && PseudoColor => ShadowGDI\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowGDI (pScreen);
+      return TRUE;
+    }
+
+  /* ShadowGDI is the only engine that supports Multi Window Mode */
+  if (pScreenInfo->fMultiWindow)
+    {
+      ErrorF ("winSetEngine - Multi Window => ShadowGDI\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowGDI (pScreen);
+      return TRUE;
+    }
+
+  /* If the user's choice is supported, we'll use that */
+  if (g_dwEnginesSupported & pScreenInfo->dwEnginePreferred)
+    {
+      ErrorF ("winSetEngine - Using user's preference: %d\n",
+	      pScreenInfo->dwEnginePreferred);
+      pScreenInfo->dwEngine = pScreenInfo->dwEnginePreferred;
+
+      /* Setup engine function pointers */
+      switch (pScreenInfo->dwEngine)
+	{
+	case WIN_SERVER_SHADOW_GDI:
+	  winSetEngineFunctionsShadowGDI (pScreen);
+	  break;
+	case WIN_SERVER_SHADOW_DD:
+	  winSetEngineFunctionsShadowDD (pScreen);
+	  break;
+	case WIN_SERVER_SHADOW_DDNL:
+	  winSetEngineFunctionsShadowDDNL (pScreen);
+	  break;
+	case WIN_SERVER_PRIMARY_DD:
+	  winSetEngineFunctionsPrimaryDD (pScreen);
+	  break;
+	case WIN_SERVER_NATIVE_GDI:
+	  winSetEngineFunctionsNativeGDI (pScreen);
+	  break;
+	default:
+	  FatalError ("winSetEngine - Invalid engine type\n");
+	}
+      return TRUE;
+    }
+
+  /* ShadowDDNL has good performance, so why not */
+  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_DDNL)
+    {
+      ErrorF ("winSetEngine - Using Shadow DirectDraw NonLocking\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DDNL;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowDDNL (pScreen);
+      return TRUE;
+    }
+
+  /* ShadowDD is next in line */
+  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_DD)
+    {
+      ErrorF ("winSetEngine - Using Shadow DirectDraw\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DD;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowDD (pScreen);
+      return TRUE;
+    }
+
+  /* ShadowGDI is next in line */
+  if (g_dwEnginesSupported & WIN_SERVER_SHADOW_GDI)
+    {
+      ErrorF ("winSetEngine - Using Shadow GDI DIB\n");
+      pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI;
+
+      /* Set engine function pointers */
+      winSetEngineFunctionsShadowGDI (pScreen);
+      return TRUE;
+    }
+
+  return TRUE;
+}
+
+
+/*
+ * Get procedure addresses for DirectDrawCreate and DirectDrawCreateClipper
+ */
+
+Bool
+winGetDDProcAddresses ()
+{
+  Bool			fReturn = TRUE;
+  
+  /* Load the DirectDraw library */
+  g_hmodDirectDraw = LoadLibraryEx ("ddraw.dll", NULL, 0);
+  if (g_hmodDirectDraw == NULL)
+    {
+      ErrorF ("winGetDDProcAddresses - Could not load ddraw.dll\n");
+      fReturn = TRUE;
+      goto winGetDDProcAddresses_Exit;
+    }
+
+  /* Try to get the DirectDrawCreate address */
+  g_fpDirectDrawCreate = GetProcAddress (g_hmodDirectDraw,
+					 "DirectDrawCreate");
+  if (g_fpDirectDrawCreate == NULL)
+    {
+      ErrorF ("winGetDDProcAddresses - Could not get DirectDrawCreate "
+	      "address\n");
+      fReturn = TRUE;
+      goto winGetDDProcAddresses_Exit;
+    }
+
+  /* Try to get the DirectDrawCreateClipper address */
+  g_fpDirectDrawCreateClipper = GetProcAddress (g_hmodDirectDraw,
+						"DirectDrawCreateClipper");
+  if (g_fpDirectDrawCreateClipper == NULL)
+    {
+      ErrorF ("winGetDDProcAddresses - Could not get "
+	      "DirectDrawCreateClipper address\n");
+      fReturn = FALSE;
+      goto winGetDDProcAddresses_Exit;
+    }
+
+  /*
+   * Note: Do not unload ddraw.dll here.  Do it in GiveUp
+   */
+
+ winGetDDProcAddresses_Exit:
+  /* Unload the DirectDraw library if we failed to initialize */
+  if (!fReturn && g_hmodDirectDraw != NULL)
+    {
+      FreeLibrary (g_hmodDirectDraw);
+      g_hmodDirectDraw = NULL;
+    }
+  
+  return fReturn;
+}