VirtualBox

source: vbox/trunk/src/VBox/Main/include/DisplayImpl.h@ 51744

Last change on this file since 51744 was 51627, checked in by vboxsync, 11 years ago

IDisplay::SetFramebufferUpdateMode and IFramebuffer::NotifyUpdateImage.
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1/* $Id: DisplayImpl.h 51627 2014-06-17 10:33:46Z vboxsync $ */
2/** @file
3 * VirtualBox COM class implementation
4 */
5
6/*
7 * Copyright (C) 2006-2014 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18#ifndef ____H_DISPLAYIMPL
19#define ____H_DISPLAYIMPL
20
21#include "VirtualBoxBase.h"
22#include "SchemaDefs.h"
23
24#include <iprt/semaphore.h>
25#include <VBox/vmm/pdmdrv.h>
26#include <VBox/VMMDev.h>
27#include <VBox/VBoxVideo.h>
28#include <VBox/vmm/pdmifs.h>
29
30#ifdef VBOX_WITH_CROGL
31# include <VBox/HostServices/VBoxCrOpenGLSvc.h>
32#endif
33
34#include "DisplaySourceBitmapWrap.h"
35
36class Console;
37struct VIDEORECCONTEXT;
38
39typedef struct _DISPLAYFBINFO
40{
41 uint32_t u32Offset;
42 uint32_t u32MaxFramebufferSize;
43 uint32_t u32InformationSize;
44
45 ComPtr<IFramebuffer> pFramebuffer;
46 ComPtr<IDisplaySourceBitmap> pSourceBitmap;
47 bool fDisabled;
48
49 FramebufferUpdateMode_T enmFramebufferUpdateMode;
50
51 struct
52 {
53 ComPtr<IDisplaySourceBitmap> pSourceBitmap;
54 uint8_t *pu8Address;
55 uint32_t cbLine;
56 } updateImage;
57
58 LONG xOrigin;
59 LONG yOrigin;
60
61 ULONG w;
62 ULONG h;
63
64 uint16_t u16BitsPerPixel;
65 uint8_t *pu8FramebufferVRAM;
66 uint32_t u32LineSize;
67
68 uint16_t flags;
69
70 VBOXVIDEOINFOHOSTEVENTS *pHostEvents;
71
72 /** The framebuffer has default format and must be updates immediately. */
73 bool fDefaultFormat;
74
75 struct
76 {
77 /* The rectangle that includes all dirty rectangles. */
78 int32_t xLeft;
79 int32_t xRight;
80 int32_t yTop;
81 int32_t yBottom;
82 } dirtyRect;
83
84#ifdef VBOX_WITH_HGSMI
85 bool fVBVAEnabled;
86 bool fVBVAForceResize;
87 bool fRenderThreadMode;
88 PVBVAHOSTFLAGS pVBVAHostFlags;
89#endif /* VBOX_WITH_HGSMI */
90
91#ifdef VBOX_WITH_CROGL
92 struct
93 {
94 bool fPending;
95 ULONG x;
96 ULONG y;
97 ULONG width;
98 ULONG height;
99 } pendingViewportInfo;
100#endif /* VBOX_WITH_CROGL */
101} DISPLAYFBINFO;
102
103class DisplayMouseInterface
104{
105public:
106 virtual int getScreenResolution(uint32_t cScreen, ULONG *pcx,
107 ULONG *pcy, ULONG *pcBPP, LONG *pXOrigin, LONG *pYOrigin) = 0;
108 virtual void getFramebufferDimensions(int32_t *px1, int32_t *py1,
109 int32_t *px2, int32_t *py2) = 0;
110};
111
112class VMMDev;
113
114class ATL_NO_VTABLE Display :
115 public VirtualBoxBase,
116 VBOX_SCRIPTABLE_IMPL(IEventListener),
117 VBOX_SCRIPTABLE_IMPL(IDisplay),
118 public DisplayMouseInterface
119{
120public:
121
122 VIRTUALBOXBASE_ADD_ERRORINFO_SUPPORT(Display, IDisplay)
123
124 DECLARE_NOT_AGGREGATABLE(Display)
125
126 DECLARE_PROTECT_FINAL_CONSTRUCT()
127
128 BEGIN_COM_MAP(Display)
129 VBOX_DEFAULT_INTERFACE_ENTRIES(IDisplay)
130 COM_INTERFACE_ENTRY(IEventListener)
131 END_COM_MAP()
132
133 DECLARE_EMPTY_CTOR_DTOR(Display)
134
135 HRESULT FinalConstruct();
136 void FinalRelease();
137
138 // public initializer/uninitializer for internal purposes only
139 HRESULT init(Console *aParent);
140 void uninit();
141 int registerSSM(PUVM pUVM);
142
143 // public methods only for internal purposes
144 int handleDisplayResize(unsigned uScreenId, uint32_t bpp, void *pvVRAM, uint32_t cbLine, uint32_t w, uint32_t h, uint16_t flags);
145 void handleDisplayUpdateLegacy(int x, int y, int cx, int cy);
146 void handleDisplayUpdate(unsigned uScreenId, int x, int y, int w, int h);
147#ifdef VBOX_WITH_VIDEOHWACCEL
148 int handleVHWACommandProcess(PVBOXVHWACMD pCommand);
149#endif
150#ifdef VBOX_WITH_CRHGSMI
151 void handleCrHgsmiCommandCompletion(int32_t result, uint32_t u32Function, PVBOXHGCMSVCPARM pParam);
152 void handleCrHgsmiControlCompletion(int32_t result, uint32_t u32Function, PVBOXHGCMSVCPARM pParam);
153 void handleCrHgsmiCommandProcess(PVBOXVDMACMD_CHROMIUM_CMD pCmd, uint32_t cbCmd);
154 void handleCrHgsmiControlProcess(PVBOXVDMACMD_CHROMIUM_CTL pCtl, uint32_t cbCtl);
155#endif
156#if defined(VBOX_WITH_HGCM) && defined(VBOX_WITH_CROGL)
157 int handleCrHgcmCtlSubmit(struct VBOXCRCMDCTL* pCmd, uint32_t cbCmd,
158 PFNCRCTLCOMPLETION pfnCompletion,
159 void *pvCompletion);
160 void handleCrVRecScreenshotPerform(uint32_t uScreen,
161 uint32_t x, uint32_t y, uint32_t uPixelFormat, uint32_t uBitsPerPixel,
162 uint32_t uBytesPerLine, uint32_t uGuestWidth, uint32_t uGuestHeight,
163 uint8_t *pu8BufferAddress, uint64_t u64TimeStamp);
164 bool handleCrVRecScreenshotBegin(uint32_t uScreen, uint64_t u64TimeStamp);
165 void handleCrVRecScreenshotEnd(uint32_t uScreen, uint64_t u64TimeStamp);
166 void handleVRecCompletion(int32_t result, uint32_t u32Function, PVBOXHGCMSVCPARM pParam, void *pvContext);
167#endif
168
169 int notifyCroglResize(const PVBVAINFOVIEW pView, const PVBVAINFOSCREEN pScreen, void *pvVRAM);
170
171 void getFramebufferDimensions(int32_t *px1, int32_t *py1, int32_t *px2, int32_t *py2);
172 int getScreenResolution(uint32_t cScreen, ULONG *pcx, ULONG *pcy,
173 ULONG *pcBPP, LONG *pXOrigin, LONG *pYOrigin)
174 {
175 return GetScreenResolution(cScreen, pcx, pcy, pcBPP, pXOrigin, pYOrigin);
176 }
177
178 int handleSetVisibleRegion(uint32_t cRect, PRTRECT pRect);
179 int handleQueryVisibleRegion(uint32_t *pcRect, PRTRECT pRect);
180
181 int VideoAccelEnable(bool fEnable, VBVAMEMORY *pVbvaMemory);
182 void VideoAccelFlush(void);
183 bool VideoAccelAllowed(void);
184 void VideoAccelVRDP(bool fEnable);
185
186 int VideoCaptureStart();
187 void VideoCaptureStop();
188 int VideoCaptureEnableScreens(ComSafeArrayIn(BOOL, aScreens));
189
190 void notifyPowerDown(void);
191
192 // IEventListener methods
193 STDMETHOD(HandleEvent)(IEvent * aEvent);
194
195 // IDisplay methods
196 STDMETHOD(GetScreenResolution)(ULONG aScreenId, ULONG *aWidth, ULONG *aHeight, ULONG *aBitsPerPixel, LONG *aXOrigin, LONG *aYOrigin);
197 STDMETHOD(AttachFramebuffer)(ULONG aScreenId,
198 IFramebuffer *aFramebuffer);
199 STDMETHOD(DetachFramebuffer)(ULONG aScreenId);
200 STDMETHOD(QueryFramebuffer)(ULONG aScreenId,
201 IFramebuffer **aFramebuffer);
202 STDMETHOD(SetVideoModeHint)(ULONG aDisplay, BOOL aEnabled, BOOL aChangeOrigin, LONG aOriginX, LONG aOriginY, ULONG aWidth, ULONG aHeight, ULONG aBitsPerPixel);
203 STDMETHOD(TakeScreenShot)(ULONG aScreenId, BYTE *address, ULONG width, ULONG height);
204 STDMETHOD(TakeScreenShotToArray)(ULONG aScreenId, ULONG width, ULONG height, ComSafeArrayOut(BYTE, aScreenData));
205 STDMETHOD(TakeScreenShotPNGToArray)(ULONG aScreenId, ULONG width, ULONG height, ComSafeArrayOut(BYTE, aScreenData));
206 STDMETHOD(DrawToScreen)(ULONG aScreenId, BYTE *address, ULONG x, ULONG y, ULONG width, ULONG height);
207 STDMETHOD(InvalidateAndUpdate)();
208 STDMETHOD(SetSeamlessMode)(BOOL enabled);
209
210 STDMETHOD(CompleteVHWACommand)(BYTE *pCommand);
211
212 STDMETHOD(ViewportChanged)(ULONG aScreenId, ULONG x, ULONG y, ULONG width, ULONG height);
213 STDMETHOD(QuerySourceBitmap)(ULONG aScreenId,
214 IDisplaySourceBitmap **aDisplaySourceBitmap);
215 STDMETHOD(SetFramebufferUpdateMode)(ULONG aScreenId,
216 FramebufferUpdateMode_T aFramebufferUpdateMode);
217
218 static const PDMDRVREG DrvReg;
219
220private:
221
222#ifdef VBOX_WITH_CRHGSMI
223 void setupCrHgsmiData(void);
224 void destructCrHgsmiData(void);
225#endif
226
227#if defined(VBOX_WITH_HGCM) && defined(VBOX_WITH_CROGL)
228 int crViewportNotify(ULONG aScreenId, ULONG x, ULONG y, ULONG width, ULONG height);
229#endif
230
231 static DECLCALLBACK(void*) drvQueryInterface(PPDMIBASE pInterface, const char *pszIID);
232 static DECLCALLBACK(int) drvConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags);
233 static DECLCALLBACK(void) drvDestruct(PPDMDRVINS pDrvIns);
234 static DECLCALLBACK(int) displayResizeCallback(PPDMIDISPLAYCONNECTOR pInterface, uint32_t bpp, void *pvVRAM, uint32_t cbLine, uint32_t cx, uint32_t cy);
235 static DECLCALLBACK(void) displayUpdateCallback(PPDMIDISPLAYCONNECTOR pInterface,
236 uint32_t x, uint32_t y, uint32_t cx, uint32_t cy);
237 static DECLCALLBACK(void) displayRefreshCallback(PPDMIDISPLAYCONNECTOR pInterface);
238 static DECLCALLBACK(void) displayResetCallback(PPDMIDISPLAYCONNECTOR pInterface);
239 static DECLCALLBACK(void) displayLFBModeChangeCallback(PPDMIDISPLAYCONNECTOR pInterface, bool fEnabled);
240 static DECLCALLBACK(void) displayProcessAdapterDataCallback(PPDMIDISPLAYCONNECTOR pInterface, void *pvVRAM, uint32_t u32VRAMSize);
241 static DECLCALLBACK(void) displayProcessDisplayDataCallback(PPDMIDISPLAYCONNECTOR pInterface, void *pvVRAM, unsigned uScreenId);
242
243#ifdef VBOX_WITH_VIDEOHWACCEL
244 static DECLCALLBACK(int) displayVHWACommandProcess(PPDMIDISPLAYCONNECTOR pInterface, PVBOXVHWACMD pCommand);
245#endif
246
247#ifdef VBOX_WITH_CRHGSMI
248 static DECLCALLBACK(void) displayCrHgsmiCommandProcess(PPDMIDISPLAYCONNECTOR pInterface, PVBOXVDMACMD_CHROMIUM_CMD pCmd, uint32_t cbCmd);
249 static DECLCALLBACK(void) displayCrHgsmiControlProcess(PPDMIDISPLAYCONNECTOR pInterface, PVBOXVDMACMD_CHROMIUM_CTL pCtl, uint32_t cbCtl);
250
251 static DECLCALLBACK(void) displayCrHgsmiCommandCompletion(int32_t result, uint32_t u32Function, PVBOXHGCMSVCPARM pParam, void *pvContext);
252 static DECLCALLBACK(void) displayCrHgsmiControlCompletion(int32_t result, uint32_t u32Function, PVBOXHGCMSVCPARM pParam, void *pvContext);
253#endif
254#if defined(VBOX_WITH_HGCM) && defined(VBOX_WITH_CROGL)
255 static DECLCALLBACK(int) displayCrHgcmCtlSubmit(PPDMIDISPLAYCONNECTOR pInterface,
256 struct VBOXCRCMDCTL* pCmd, uint32_t cbCmd,
257 PFNCRCTLCOMPLETION pfnCompletion,
258 void *pvCompletion);
259 static DECLCALLBACK(void) displayCrHgcmCtlSubmitCompletion(int32_t result, uint32_t u32Function, PVBOXHGCMSVCPARM pParam, void *pvContext);
260#endif
261#ifdef VBOX_WITH_HGSMI
262 static DECLCALLBACK(int) displayVBVAEnable(PPDMIDISPLAYCONNECTOR pInterface, unsigned uScreenId, PVBVAHOSTFLAGS pHostFlags, bool fRenderThreadMode);
263 static DECLCALLBACK(void) displayVBVADisable(PPDMIDISPLAYCONNECTOR pInterface, unsigned uScreenId);
264 static DECLCALLBACK(void) displayVBVAUpdateBegin(PPDMIDISPLAYCONNECTOR pInterface, unsigned uScreenId);
265 static DECLCALLBACK(void) displayVBVAUpdateProcess(PPDMIDISPLAYCONNECTOR pInterface, unsigned uScreenId, const PVBVACMDHDR pCmd, size_t cbCmd);
266 static DECLCALLBACK(void) displayVBVAUpdateEnd(PPDMIDISPLAYCONNECTOR pInterface, unsigned uScreenId, int32_t x, int32_t y, uint32_t cx, uint32_t cy);
267 static DECLCALLBACK(int) displayVBVAResize(PPDMIDISPLAYCONNECTOR pInterface, const PVBVAINFOVIEW pView, const PVBVAINFOSCREEN pScreen, void *pvVRAM);
268 static DECLCALLBACK(int) displayVBVAMousePointerShape(PPDMIDISPLAYCONNECTOR pInterface, bool fVisible, bool fAlpha, uint32_t xHot, uint32_t yHot, uint32_t cx, uint32_t cy, const void *pvShape);
269#endif
270
271#if defined(VBOX_WITH_HGCM) && defined(VBOX_WITH_CROGL)
272 static DECLCALLBACK(void) displayCrVRecScreenshotPerform(void *pvCtx, uint32_t uScreen,
273 uint32_t x, uint32_t y,
274 uint32_t uBitsPerPixel, uint32_t uBytesPerLine,
275 uint32_t uGuestWidth, uint32_t uGuestHeight,
276 uint8_t *pu8BufferAddress, uint64_t u64TimeStamp);
277 static DECLCALLBACK(bool) displayCrVRecScreenshotBegin(void *pvCtx, uint32_t uScreen, uint64_t u64TimeStamp);
278 static DECLCALLBACK(void) displayCrVRecScreenshotEnd(void *pvCtx, uint32_t uScreen, uint64_t u64TimeStamp);
279
280 static DECLCALLBACK(void) displayVRecCompletion(int32_t result, uint32_t u32Function, PVBOXHGCMSVCPARM pParam, void *pvContext);
281#endif
282 static DECLCALLBACK(void) displayCrCmdFree(struct VBOXCRCMDCTL* pCmd, uint32_t cbCmd, int rc, void *pvCompletion);
283
284 static DECLCALLBACK(void) displaySSMSaveScreenshot(PSSMHANDLE pSSM, void *pvUser);
285 static DECLCALLBACK(int) displaySSMLoadScreenshot(PSSMHANDLE pSSM, void *pvUser, uint32_t uVersion, uint32_t uPass);
286 static DECLCALLBACK(void) displaySSMSave(PSSMHANDLE pSSM, void *pvUser);
287 static DECLCALLBACK(int) displaySSMLoad(PSSMHANDLE pSSM, void *pvUser, uint32_t uVersion, uint32_t uPass);
288
289 Console * const mParent;
290 /** Pointer to the associated display driver. */
291 struct DRVMAINDISPLAY *mpDrv;
292 /** Pointer to the device instance for the VMM Device. */
293 PPDMDEVINS mpVMMDev;
294 /** Set after the first attempt to find the VMM Device. */
295 bool mfVMMDevInited;
296
297 unsigned mcMonitors;
298 DISPLAYFBINFO maFramebuffers[SchemaDefs::MaxGuestMonitors];
299
300 bool mfSourceBitmapEnabled;
301 bool volatile fVGAResizing;
302
303 VBVAMEMORY *mpVbvaMemory;
304 bool mfVideoAccelEnabled;
305 bool mfVideoAccelVRDP;
306 uint32_t mfu32SupportedOrders;
307
308 int32_t volatile mcVideoAccelVRDPRefs;
309
310 VBVAMEMORY *mpPendingVbvaMemory;
311 bool mfPendingVideoAccelEnable;
312 bool mfMachineRunning;
313#ifdef VBOX_WITH_CROGL
314 bool mfCrOglDataHidden;
315#endif
316
317 uint8_t *mpu8VbvaPartial;
318 uint32_t mcbVbvaPartial;
319
320#ifdef VBOX_WITH_CRHGSMI
321 /* for fast host hgcm calls */
322 HGCMCVSHANDLE mhCrOglSvc;
323 RTCRITSECTRW mCrOglLock;
324#endif
325#ifdef VBOX_WITH_CROGL
326 CR_MAIN_INTERFACE mCrOglCallbacks;
327 volatile uint32_t mfCrOglVideoRecState;
328 CRVBOXHGCMTAKESCREENSHOT mCrOglScreenshotData;
329 VBOXCRCMDCTL_HGCM mCrOglScreenshotCtl;
330#endif
331
332 bool vbvaFetchCmd(VBVACMDHDR **ppHdr, uint32_t *pcbCmd);
333 void vbvaReleaseCmd(VBVACMDHDR *pHdr, int32_t cbCmd);
334
335 void handleResizeCompletedEMT(unsigned uScreenId, BOOL fResizeContext);
336
337 RTCRITSECT mVBVALock;
338 volatile uint32_t mfu32PendingVideoAccelDisable;
339
340 int vbvaLock(void);
341 void vbvaUnlock(void);
342
343public:
344 static int displayTakeScreenshotEMT(Display *pDisplay, ULONG aScreenId, uint8_t **ppu8Data, size_t *pcbData, uint32_t *pu32Width, uint32_t *pu32Height);
345
346#if defined(VBOX_WITH_HGCM) && defined(VBOX_WITH_CROGL)
347 static BOOL displayCheckTakeScreenshotCrOgl(Display *pDisplay, ULONG aScreenId, uint8_t *pu8Data, uint32_t u32Width, uint32_t u32Height);
348 int crCtlSubmit(struct VBOXCRCMDCTL* pCmd, uint32_t cbCmd, PFNCRCTLCOMPLETION pfnCompletion, void *pvCompletion);
349 int crCtlSubmitSync(struct VBOXCRCMDCTL* pCmd, uint32_t cbCmd);
350 /* copies the given command and submits it asynchronously,
351 * i.e. the pCmd data may be discarded right after the call returns */
352 int crCtlSubmitAsyncCmdCopy(struct VBOXCRCMDCTL* pCmd, uint32_t cbCmd);
353 /* performs synchronous request processing if 3D backend has something to display
354 * this is primarily to work-around 3d<->main thread deadlocks on OSX
355 * in case of async completion, the command is coppied to the allocated buffer,
356 * freeded on command completion
357 * can be used for "notification" commands, when client is not interested in command result,
358 * that must synchronize with 3D backend only when some 3D data is displayed.
359 * The routine does NOT provide any info on whether command is processed asynchronously or not */
360 int crCtlSubmitSyncIfHasDataForScreen(uint32_t u32ScreenID, struct VBOXCRCMDCTL* pCmd, uint32_t cbCmd);
361#endif
362
363private:
364 static void InvalidateAndUpdateEMT(Display *pDisplay, unsigned uId, bool fUpdateAll);
365 static int drawToScreenEMT(Display *pDisplay, ULONG aScreenId, BYTE *address, ULONG x, ULONG y, ULONG width, ULONG height);
366
367 int videoAccelRefreshProcess(void);
368
369 /* Functions run under VBVA lock. */
370 int videoAccelEnable(bool fEnable, VBVAMEMORY *pVbvaMemory);
371 void videoAccelFlush(void);
372
373#if defined(VBOX_WITH_HGCM) && defined(VBOX_WITH_CROGL)
374 int crOglWindowsShow(bool fShow);
375#endif
376
377#ifdef VBOX_WITH_HGSMI
378 volatile uint32_t mu32UpdateVBVAFlags;
379#endif
380
381#ifdef VBOX_WITH_VPX
382 VIDEORECCONTEXT *mpVideoRecCtx;
383 bool maVideoRecEnabled[SchemaDefs::MaxGuestMonitors];
384#endif
385};
386
387void gdImageCopyResampled(uint8_t *dst, uint8_t *src,
388 int dstX, int dstY, int srcX, int srcY,
389 int dstW, int dstH, int srcW, int srcH);
390
391void BitmapScale32(uint8_t *dst, int dstW, int dstH,
392 const uint8_t *src, int iDeltaLine, int srcW, int srcH);
393
394int DisplayMakePNG(uint8_t *pu8Data, uint32_t cx, uint32_t cy,
395 uint8_t **ppu8PNG, uint32_t *pcbPNG, uint32_t *pcxPNG, uint32_t *pcyPNG,
396 uint8_t fLimitSize);
397
398class ATL_NO_VTABLE DisplaySourceBitmap:
399 public DisplaySourceBitmapWrap
400{
401public:
402
403 DECLARE_EMPTY_CTOR_DTOR(DisplaySourceBitmap)
404
405 HRESULT FinalConstruct();
406 void FinalRelease();
407
408 /* Public initializer/uninitializer for internal purposes only. */
409 HRESULT init(ComObjPtr<Display> pDisplay, unsigned uScreenId, DISPLAYFBINFO *pFBInfo);
410 void uninit();
411
412 bool usesVRAM(void) { return m.pu8Allocated == NULL; }
413
414private:
415 // wrapped IDisplaySourceBitmap properties
416 virtual HRESULT getScreenId(ULONG *aScreenId);
417
418 // wrapped IDisplaySourceBitmap methods
419 virtual HRESULT queryBitmapInfo(BYTE **aAddress,
420 ULONG *aWidth,
421 ULONG *aHeight,
422 ULONG *aBitsPerPixel,
423 ULONG *aBytesPerLine,
424 ULONG *aPixelFormat);
425
426 int initSourceBitmap(unsigned aScreenId, DISPLAYFBINFO *pFBInfo);
427
428 struct Data
429 {
430 ComObjPtr<Display> pDisplay;
431 unsigned uScreenId;
432 DISPLAYFBINFO *pFBInfo;
433
434 uint8_t *pu8Allocated;
435
436 uint8_t *pu8Address;
437 ULONG ulWidth;
438 ULONG ulHeight;
439 ULONG ulBitsPerPixel;
440 ULONG ulBytesPerLine;
441 ULONG ulPixelFormat;
442 };
443
444 Data m;
445};
446
447#endif // ____H_DISPLAYIMPL
448/* vi: set tabstop=4 shiftwidth=4 expandtab: */
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