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-rw-r--r--hw/xwin/winengine.c309
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diff --git a/hw/xwin/winengine.c b/hw/xwin/winengine.c
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+/*
+ *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;
+}
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