197 lines
5.0 KiB
C
197 lines
5.0 KiB
C
/*
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* USER driver support
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*
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* Copyright 2000, 2005 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <wchar.h>
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#include "user_private.h"
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#include "winnls.h"
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#include "wine/debug.h"
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#include "controls.h"
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WINE_DEFAULT_DEBUG_CHANNEL(user);
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static struct user_driver_funcs null_driver, lazy_load_driver;
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const struct user_driver_funcs *USER_Driver = &lazy_load_driver;
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/* load the graphics driver */
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static const struct user_driver_funcs *load_driver(void)
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{
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wait_graphics_driver_ready();
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if (USER_Driver == &lazy_load_driver)
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{
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static struct user_driver_funcs empty_funcs;
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WARN( "failed to load the display driver, falling back to null driver\n" );
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__wine_set_user_driver( &empty_funcs, WINE_GDI_DRIVER_VERSION );
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}
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return USER_Driver;
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}
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/* unload the graphics driver on process exit */
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void USER_unload_driver(void)
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{
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struct user_driver_funcs *prev;
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__wine_set_display_driver( &null_driver, WINE_GDI_DRIVER_VERSION );
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/* make sure we don't try to call the driver after it has been detached */
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prev = InterlockedExchangePointer( (void **)&USER_Driver, &null_driver );
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if (prev != &lazy_load_driver && prev != &null_driver)
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HeapFree( GetProcessHeap(), 0, prev );
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}
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/**********************************************************************
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* Null user driver
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*
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* These are fallbacks for entry points that are not implemented in the real driver.
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*/
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static void CDECL nulldrv_UpdateClipboard(void)
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{
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}
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static DWORD CDECL nulldrv_MsgWaitForMultipleObjectsEx( DWORD count, const HANDLE *handles, DWORD timeout,
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DWORD mask, DWORD flags )
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{
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if (!count && !timeout) return WAIT_TIMEOUT;
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return WaitForMultipleObjectsEx( count, handles, flags & MWMO_WAITALL,
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timeout, flags & MWMO_ALERTABLE );
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}
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static void CDECL nulldrv_SetWindowIcon( HWND hwnd, UINT type, HICON icon )
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{
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}
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static void CDECL nulldrv_SetWindowText( HWND hwnd, LPCWSTR text )
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{
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}
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static LRESULT CDECL nulldrv_SysCommand( HWND hwnd, WPARAM wparam, LPARAM lparam )
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{
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return -1;
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}
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/**********************************************************************
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* Lazy loading user driver
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*
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* Initial driver used before another driver is loaded.
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* Each entry point simply loads the real driver and chains to it.
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*/
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static void CDECL loaderdrv_UpdateClipboard(void)
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{
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load_driver()->pUpdateClipboard();
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}
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static struct user_driver_funcs lazy_load_driver =
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{
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{ NULL },
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/* keyboard functions */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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/* cursor/icon functions */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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/* clipboard functions */
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loaderdrv_UpdateClipboard,
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/* display modes */
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NULL,
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NULL,
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NULL,
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/* windowing functions */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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nulldrv_MsgWaitForMultipleObjectsEx,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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nulldrv_SetWindowIcon,
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NULL,
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nulldrv_SetWindowText,
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NULL,
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nulldrv_SysCommand,
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NULL,
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NULL,
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NULL,
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NULL,
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/* system parameters */
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NULL,
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/* vulkan support */
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NULL,
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/* opengl support */
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NULL,
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/* thread management */
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NULL,
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};
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void CDECL __wine_set_user_driver( const struct user_driver_funcs *funcs, UINT version )
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{
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struct user_driver_funcs *driver, *prev;
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if (version != WINE_GDI_DRIVER_VERSION)
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{
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ERR( "version mismatch, driver wants %u but user32 has %u\n", version, WINE_GDI_DRIVER_VERSION );
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return;
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}
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driver = HeapAlloc( GetProcessHeap(), 0, sizeof(*driver) );
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*driver = *funcs;
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#define SET_USER_FUNC(name) \
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do { if (!driver->p##name) driver->p##name = nulldrv_##name; } while(0)
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SET_USER_FUNC(UpdateClipboard);
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SET_USER_FUNC(MsgWaitForMultipleObjectsEx);
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SET_USER_FUNC(SetWindowIcon);
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SET_USER_FUNC(SetWindowText);
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SET_USER_FUNC(SysCommand);
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#undef SET_USER_FUNC
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prev = InterlockedCompareExchangePointer( (void **)&USER_Driver, driver, &lazy_load_driver );
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if (prev != &lazy_load_driver)
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{
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/* another thread beat us to it */
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HeapFree( GetProcessHeap(), 0, driver );
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driver = prev;
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}
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__wine_set_display_driver( driver, version );
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}
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