323 lines
9.4 KiB
C
323 lines
9.4 KiB
C
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/******************************Module*Header*******************************\
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* Module Name: glgenwin.h
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*
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* Client side replacement for WNDOBJ. Tracks window state (size, location,
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* clip region, etc.).
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*
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* Created: 12-Jan-1995 00:31:42
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* Author: Gilman Wong [gilmanw]
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*
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* Copyright (c) 1994 Microsoft Corporation
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*
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\**************************************************************************/
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#ifndef _GLGENWIN_H_
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#define _GLGENWIN_H_
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// Tracks lock/unlock calls on windows if defined. This is always
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// on for checked builds.
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#define TRACK_WINCRIT
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#if DBG && !defined(TRACK_WINCRIT)
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#define TRACK_WINCRIT
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#endif
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// Not defined in NT 3.51!
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typedef ULONG FLONG;
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/*
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* GLGENscan structure
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*
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* Represents a single scan of a region. Consists of a top, a bottom
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* and an even number of walls.
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*
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* Part of the GLGENscanData structure.
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*/
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typedef struct GLGENscanRec GLGENscan;
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typedef struct GLGENscanRec
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{
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// Accelerator points to next GLGENscan in the array (we could compute).
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GLGENscan *pNext;
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ULONG cWalls;
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LONG top;
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LONG bottom;
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#ifdef _IA64_
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LONG pad;
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#endif
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LONG alWalls[1]; // array of walls
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} GLGENscan;
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/*
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* GLGENscanData structure
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*
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* Scan line oriented version of the visible region info in the RGNDATA
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* structure.
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*/
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typedef struct GLGENscanDataRec
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{
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ULONG cScans;
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GLGENscan aScans[1]; // array of scans
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} GLGENscanData;
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/*
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* GLGENlayerInfo structure
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*
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* Information about an overlay/underlay.
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*/
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typedef struct GLGENlayerInfo
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{
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LONG cPalEntries;
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COLORREF pPalEntries[1];
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} GLGENlayerInfo;
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/*
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* GLGENlayers structure
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*
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*
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*/
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typedef struct GLGENlayers
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{
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GLGENlayerInfo *overlayInfo[15];
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GLGENlayerInfo *underlayInfo[15];
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} GLGENlayers;
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/*
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* Identifying information for a window
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*/
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#define GLWID_ERROR 0
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#define GLWID_HWND 1
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#define GLWID_HDC 2
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#define GLWID_DDRAW 3
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typedef struct IDirectDrawSurface *LPDIRECTDRAWSURFACE;
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typedef struct _GLWINDOWID
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{
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int iType;
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HWND hwnd;
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HDC hdc;
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LPDIRECTDRAWSURFACE pdds;
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} GLWINDOWID;
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#define CLC_TRIVIAL 0
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#define CLC_RECT 1
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#define CLC_COMPLEX 2
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/*
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* GLGENwindows structure
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*
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* Substitute for the NT DDI's WNDOBJ service. This structure is used to
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* track the current state of a window (size, location, clipping). A
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* semaphore protected linked list of these is kept globally per-process.
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*/
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typedef struct GLGENwindowRec GLGENwindow;
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typedef struct GLGENwindowRec
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{
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struct __GLGENbuffersRec *buffers; // Buffer information
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int clipComplexity; // Clipping area complexity
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RECTL rclBounds; // Clip area bounds
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RECTL rclClient; // Window client rect
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GLGENwindow *pNext; // linked list
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GLWINDOWID gwid; // Identifying information
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int ipfd; // pixel format assigned to this window
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int ipfdDevMax; // max. device pixel format
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WNDPROC pfnOldWndProc; // original WndProc function
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ULONG ulPaletteUniq; // uniq palette id
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ULONG ulFlags;
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// These fields are used for direct screen access
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LPDIRECTDRAWCLIPPER pddClip;// DirectDraw clipper assocated with window
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UINT cjrgndat; // size of RGNDATA struct
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RGNDATA *prgndat; // pointer to RGNDATA struct
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// Scan version of RGNDATA.
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UINT cjscandat; // size of GLGENscanData struct
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GLGENscanData *pscandat; // pointer to GLGENscanData struct
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// Installable client drivers ONLY.
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PVOID pvDriver; // pointer to GLDRIVER for window
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// Layer palettes for MCD drivers ONLY.
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GLGENlayers *plyr; // pointer to GLGENlayers for window
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// non-NULL only if overlays for MCD are
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// actively in use
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// DirectDraw surface vtbl pointer for doing DDraw surface validation
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void *pvSurfaceVtbl;
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// DirectDraw surface locked if DIRECTSCREEN is set
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LPDIRECTDRAWSURFACE pddsDirectScreen;
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void *pvDirectScreen;
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void *pvDirectScreenLock;
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// MCD server-side handle for this window
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ULONG_PTR dwMcdWindow;
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//
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// Reference counting and serialization.
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//
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// Count of things holding a pointer to this window.
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LONG lUsers;
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// All accesses to this window's data must occur under this lock.
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CRITICAL_SECTION sem;
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// Context that is currently holding this window's lock.
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struct __GLGENcontextRec *gengc;
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// Thread that is currently holding this window's lock and
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// recursion count on this window's lock. This information may
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// be in the critical section but to be cross-platform we
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// maintain it ourselves.
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DWORD owningThread;
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DWORD lockRecursion;
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} GLGENwindow;
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/*
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* GLGENwindow::ulFlags
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*
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* GLGENWIN_DIRECTSCREEN Direct screen access locks are held
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* GLGENWIN_OTHERPROCESS The window handle is from another process
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* GLGENWIN_DRIVERSET pvDriver has been set
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*/
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#define GLGENWIN_DIRECTSCREEN 0x00000001
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#define GLGENWIN_OTHERPROCESS 0x00000002
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#define GLGENWIN_DRIVERSET 0x00000004
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/*
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* Global header node for the linked list of GLGENwindow structures.
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* The semaphore in the header node is used as the list access semaphore.
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*/
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extern GLGENwindow gwndHeader;
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/*
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* GLGENwindow list management functions.
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*/
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// Retrieves the GLGENwindow that corresponds to the specified HWND.
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// NULL if failure.
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// Increments lUsers
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extern GLGENwindow * APIENTRY pwndGetFromHWND(HWND hwnd);
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// Retrieves the GLGENwindow that corresponds to the specified HDC.
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// NULL if failure.
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// Increments lUsers
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extern GLGENwindow * APIENTRY pwndGetFromMemDC(HDC hdc);
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// Retrieves the GLGENwindow that corresponds to the specified DDraw surface.
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// NULL if failure.
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// Increments lUsers
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GLGENwindow *pwndGetFromDdraw(LPDIRECTDRAWSURFACE pdds);
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// General retrieval
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// NULL if failure.
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// Increments lUsers
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extern GLGENwindow * APIENTRY pwndGetFromID(GLWINDOWID *pgwid);
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// Allocates a new GLGENwindow structure and puts it into the linked list.
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// NULL if failure.
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// Starts lUsers at 1
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extern GLGENwindow * APIENTRY pwndNew(GLGENwindow *pwndInit);
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// Creates a GLGENwindow for the given information
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extern GLGENwindow * APIENTRY CreatePwnd(GLWINDOWID *pgwid, int ipfd,
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int ipfdDevMax, DWORD dwObjectType,
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RECTL *prcl, BOOL *pbNew);
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// Cleans up resources for a GLGENwindow
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// NULL if success; pointer to GLGENwindow structure if failure.
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extern GLGENwindow * APIENTRY pwndFree(GLGENwindow *pwnd,
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BOOL bExitProcess);
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// Removes an active GLGENwindow from the window list and
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// waits for a safe time to clean it up, then pwndFrees it
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extern void APIENTRY pwndCleanup(GLGENwindow *pwnd);
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// Decrements lUsers
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#if DBG
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extern void APIENTRY pwndRelease(GLGENwindow *pwnd);
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#else
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#define pwndRelease(pwnd) \
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InterlockedDecrement(&(pwnd)->lUsers)
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#endif
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// Unlocks pwnd->sem and does pwndRelease
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extern void APIENTRY pwndUnlock(GLGENwindow *pwnd,
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struct __GLGENcontextRec *gengc);
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// Removes and deletes all GLGENwindow structures from the linked list.
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// Must *ONLY* be called from process detach (GLUnInitializeProcess).
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extern VOID APIENTRY vCleanupWnd(VOID);
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// Retrieves layer information for the specified layer of the pwnd.
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// Allocates if necessary.
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extern GLGENlayerInfo * APIENTRY plyriGet(GLGENwindow *pwnd, HDC hdc, int iLayer);
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void APIENTRY WindowIdFromHdc(HDC hdc, GLWINDOWID *pgwid);
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//
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// Begin/end direct screen access
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//
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extern BOOL BeginDirectScreenAccess(struct __GLGENcontextRec *gengc,
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GLGENwindow *pwnd,
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PIXELFORMATDESCRIPTOR *ppfd);
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extern VOID EndDirectScreenAccess(GLGENwindow *pwnd);
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//
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// Debugging support for tracking lock/unlock on a window.
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//
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#if DBG || defined(TRACK_WINCRIT)
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// Don't use ASSERTOPENGL so this can be used on free builds.
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#define ASSERT_WINCRIT(pwnd) \
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if ((pwnd)->owningThread != GetCurrentThreadId()) \
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{ \
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DbgPrint("Window 0x%08lX owned by 0x%X, not 0x%X\n", \
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(pwnd), (pwnd)->owningThread, GetCurrentThreadId()); \
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DebugBreak(); \
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}
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#define ASSERT_NOT_WINCRIT(pwnd) \
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if ((pwnd)->owningThread == GetCurrentThreadId()) \
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{ \
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DbgPrint("Window 0x%08lX already owned by 0x%X\n", \
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(pwnd), (pwnd)->owningThread); \
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DebugBreak(); \
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}
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// Asserts that the current thread can recursively take the given
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// wincrit. For this to be true it must be unowned or owned by
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// the same thread.
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#define ASSERT_COMPATIBLE_WINCRIT(pwnd) \
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if ((pwnd)->owningThread != 0 && \
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(pwnd)->owningThread != GetCurrentThreadId()) \
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{ \
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DbgPrint("Window 0x%08lX owned by 0x%X, not 0x%X\n", \
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(pwnd), (pwnd)->owningThread, GetCurrentThreadId()); \
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DebugBreak(); \
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}
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#else
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#define ASSERT_WINCRIT(pwnd)
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#define ASSERT_NOT_WINCRIT(pwnd)
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#define ASSERT_COMPATIBLE_WINCRIT(pwnd)
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#endif
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// Use both GC and non-GC forms so it's possible to write macros
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// for both cases if we want to in the future.
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void ENTER_WINCRIT_GC(GLGENwindow *pwnd, struct __GLGENcontextRec *gengc);
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void LEAVE_WINCRIT_GC(GLGENwindow *pwnd, struct __GLGENcontextRec *gengc);
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#define ENTER_WINCRIT(pwnd) ENTER_WINCRIT_GC(pwnd, NULL)
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#define LEAVE_WINCRIT(pwnd) LEAVE_WINCRIT_GC(pwnd, NULL)
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#endif //_GLGENWIN_H_
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