reactos/subsystems/win32/win32k/objects/gdibatch.c

   1
   2 #include <w32k.h>
   3
   4 #define NDEBUG
   5 #include <debug.h>
   6
   7
   8 //
   9 //
  10 // Gdi Batch Flush support functions.
  11 //
  12
  13 //
  14 // DoDeviceSync
  15 //
  16 // based on IntEngEnter from eng/engmisc.c
  17 //
  18 VOID
  19 FASTCALL
  20 DoDeviceSync( SURFOBJ *Surface, PRECTL Rect, FLONG fl)
  21 {
  22   PPDEVOBJ Device = (PDEVOBJ*)Surface->hdev;
  23 // No punting and "Handle to a surface, provided that the surface is device-managed.
  24 // Otherwise, dhsurf is zero".
  25   if (!(Device->flFlags & PDEV_DRIVER_PUNTED_CALL) && (Surface->dhsurf))
  26   {
  27      if (Device->DriverFunctions.SynchronizeSurface)
  28      {
  29        Device->DriverFunctions.SynchronizeSurface(Surface, Rect, fl);
  30      }
  31      else
  32      {
  33        if (Device->DriverFunctions.Synchronize)
  34        {
  35          Device->DriverFunctions.Synchronize(Surface->dhpdev, Rect);
  36        }
  37      }
  38   }
  39 }
  40
  41 VOID
  42 FASTCALL
  43 SynchonizeDriver(FLONG Flags)
  44 {
  45   SURFOBJ *SurfObj;
  46   PPDEVOBJ Device;
  47
  48   if (Flags & GCAPS2_SYNCFLUSH)
  49       Flags = DSS_FLUSH_EVENT;
  50   if (Flags & GCAPS2_SYNCTIMER)
  51       Flags = DSS_TIMER_EVENT;
  52
  53   Device = IntEnumHDev();
  54
  55   SurfObj = EngLockSurface( Device->pSurface );
  56   if(!SurfObj) return;
  57   DoDeviceSync( SurfObj, NULL, Flags);
  58   EngUnlockSurface(SurfObj);
  59   return;
  60 }
  61
  62 //
  63 // Process the batch.
  64 //
  65 ULONG
  66 FASTCALL
  67 GdiFlushUserBatch(PDC dc, PGDIBATCHHDR pHdr)
  68 {
  69   PDC_ATTR pdcattr = NULL;
  70
  71   if (dc)
  72   {
  73     pdcattr = dc->pdcattr;
  74   }
  75   // FYI! The thread is approaching the end of sunset.
  76   switch(pHdr->Cmd)
  77   {
  78      case GdiBCPatBlt: // Highest pri first!
  79         break;
  80      case GdiBCPolyPatBlt:
  81         break;
  82      case GdiBCTextOut:
  83         break;
  84      case GdiBCExtTextOut:
  85         break;
  86      case GdiBCSetBrushOrg:
  87      {
  88         PGDIBSSETBRHORG pgSBO;
  89         if(!dc) break;
  90         pgSBO = (PGDIBSSETBRHORG) pHdr;
  91         pdcattr->ptlBrushOrigin = pgSBO->ptlBrushOrigin;
  92         break;
  93      }
  94      case GdiBCExtSelClipRgn:
  95         break;
  96      case GdiBCSelObj:
  97      {
  98         PGDIBSOBJECT pgO;
  99         if(!dc) break;
 100         pgO = (PGDIBSOBJECT) pHdr;
 101         TextIntRealizeFont((HFONT) pgO->hgdiobj, NULL);
 102         pdcattr->ulDirty_ &= ~(DIRTY_CHARSET);
 103      }
 104      case GdiBCDelRgn:
 105         DPRINT("Delete Region Object!\n");
 106      case GdiBCDelObj:
 107      {
 108         PGDIBSOBJECT pgO = (PGDIBSOBJECT) pHdr;
 109         GreDeleteObject( pgO->hgdiobj );
 110         break;
 111      }
 112      default:
 113         break;
 114   }
 115
 116   return pHdr->Size; // Return the full size of the structure.
 117 }
 118
 119 /*
 120  * NtGdiFlush
 121  *
 122  * Flushes the calling thread's current batch.
 123  */
 124 VOID
 125 APIENTRY
 126 NtGdiFlush(VOID)
 127 {
 128   SynchonizeDriver(GCAPS2_SYNCFLUSH);
 129 }
 130
 131 /*
 132  * NtGdiFlushUserBatch
 133  *
 134  * Callback for thread batch flush routine.
 135  *
 136  * Think small & fast!
 137  */
 138 NTSTATUS
 139 APIENTRY
 140 NtGdiFlushUserBatch(VOID)
 141 {
 142   BOOL Hit;
 143   PTEB pTeb = NtCurrentTeb();
 144   ULONG GdiBatchCount = pTeb->GdiBatchCount;
 145
 146   if( (GdiBatchCount > 0) && (GdiBatchCount <= (GDIBATCHBUFSIZE/4)))
 147   {
 148     HDC hDC = (HDC) pTeb->GdiTebBatch.HDC;
 149
 150     /*  If hDC is zero and the buffer fills up with delete objects we need
 151         to run anyway.
 152      */
 153     if (hDC || GdiBatchCount)
 154     {
 155       PCHAR pHdr = (PCHAR)&pTeb->GdiTebBatch.Buffer[0];
 156       PDC pDC = NULL;
 157
 158       if (hDC && !IsObjectDead(hDC))
 159       {
 160           pDC = DC_LockDc(hDC);
 161       }
 162
 163        // No need to init anything, just go!
 164        for (Hit = FALSE; GdiBatchCount > 0; GdiBatchCount--)
 165        {   /*
 166               Looks like a hack,
 167               feels like a hack,
 168               you're right it's a hack,
 169               due to the lack,
 170               of kernel thread locking when it is in sunset!
 171             */
 172            _SEH2_TRY
 173            {
 174               ((PGDIBATCHHDR)pHdr)->Cmd = ((PGDIBATCHHDR)pHdr)->Cmd;
 175            }
 176            _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 177            {
 178               Hit = TRUE;
 179            }
 180            _SEH2_END;
 181
 182            if (Hit) break;
 183
 184            // Process Gdi Batch!
 185            pHdr += GdiFlushUserBatch(pDC, (PGDIBATCHHDR) pHdr);
 186        }
 187
 188        if (pDC)
 189        {
 190            DC_UnlockDc(pDC);
 191        }
 192
 193        // Exit and clear out for the next round.
 194        pTeb->GdiTebBatch.Offset = 0;
 195        pTeb->GdiBatchCount = 0;
 196        pTeb->GdiTebBatch.HDC = 0;
 197     }
 198   }
 199
 200   // FIXME: on xp the function returns &pTeb->RealClientId, maybe VOID?
 201   return STATUS_SUCCESS;
 202 }
 203
 204