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IABSD.fr/xenocara/xserver/hw/xwin/winengine.c
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- xserver/hw/xwin/winengine.c
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/* *Copyright (C) 2001-2004 Harold L Hunt II 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 HAROLD L HUNT II 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 Harold L Hunt II *shall not be used in advertising or otherwise to promote the sale, use *or other dealings in this Software without prior written authorization *from Harold L Hunt II. * * Authors: Harold L Hunt II */ #ifdef HAVE_XWIN_CONFIG_H #include <xwin-config.h> #endif #include "win.h" #include "winmsg.h" /* * Global variables for function pointers into * dynamically loaded libraries */ FARPROC g_fpDirectDrawCreate = NULL; FARPROC g_fpDirectDrawCreateClipper = NULL; /* module handle for dynamically loaded directdraw library */ static HMODULE g_hmodDirectDraw = NULL; /* * Detect engines supported by current Windows version * DirectDraw version and hardware */ void winDetectSupportedEngines(void) { /* Initialize the engine support flags */ g_dwEnginesSupported = WIN_SERVER_SHADOW_GDI; /* 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 */ winErrorFVerb(2, "winDetectSupportedEngines - DirectDraw not installed\n"); return; } /* Try to query for DirectDraw4 interface */ ddrval = IDirectDraw_QueryInterface(lpdd, &IID_IDirectDraw4, (LPVOID *) &lpdd4); if (SUCCEEDED(ddrval)) { /* We have DirectDraw4 */ winErrorFVerb(2, "winDetectSupportedEngines - DirectDraw4 installed, allowing ShadowDDNL\n"); g_dwEnginesSupported |= WIN_SERVER_SHADOW_DDNL; } /* Cleanup DirectDraw interfaces */ if (lpdd4 != NULL) IDirectDraw_Release(lpdd4); if (lpdd != NULL) IDirectDraw_Release(lpdd); } winErrorFVerb(2, "winDetectSupportedEngines - Returning, supported engines %08x\n", (unsigned int) 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) { winErrorFVerb(2, "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 (FALSE || pScreenInfo->fMultiWindow ) { winErrorFVerb(2, "winSetEngine - Multi Window or Rootless => 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) { winErrorFVerb(2, "winSetEngine - Using user's preference: %d\n", (int) 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_DDNL: winSetEngineFunctionsShadowDDNL(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) { winErrorFVerb(2, "winSetEngine - Using Shadow DirectDraw NonLocking\n"); pScreenInfo->dwEngine = WIN_SERVER_SHADOW_DDNL; /* Set engine function pointers */ winSetEngineFunctionsShadowDDNL(pScreen); return TRUE; } /* ShadowGDI is next in line */ if (g_dwEnginesSupported & WIN_SERVER_SHADOW_GDI) { winErrorFVerb(2, "winSetEngine - Using Shadow GDI DIB\n"); pScreenInfo->dwEngine = WIN_SERVER_SHADOW_GDI; /* Set engine function pointers */ winSetEngineFunctionsShadowGDI(pScreen); return TRUE; } return FALSE; } /* * Get procedure addresses for DirectDrawCreate and DirectDrawCreateClipper */ Bool winGetDDProcAddresses(void) { 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; } void winReleaseDDProcAddresses(void) { if (g_hmodDirectDraw != NULL) { FreeLibrary(g_hmodDirectDraw); g_hmodDirectDraw = NULL; g_fpDirectDrawCreate = NULL; g_fpDirectDrawCreateClipper = NULL; } }