Add IntEngAlphaBlend and NtGdiAlphaBlend functions, EngAlphaBlend (the
real implementation) is still missing.
Modified: trunk/reactos/subsys/win32k/eng/bitblt.c
Modified: trunk/reactos/subsys/win32k/include/inteng.h
Modified: trunk/reactos/subsys/win32k/objects/bitmaps.c
_____
Modified: trunk/reactos/subsys/win32k/eng/bitblt.c
--- trunk/reactos/subsys/win32k/eng/bitblt.c 2005-10-30 22:14:11 UTC
(rev 18895)
+++ trunk/reactos/subsys/win32k/eng/bitblt.c 2005-10-30 22:16:30 UTC
(rev 18896)
@@ -889,6 +889,62 @@
return ret;
}
+BOOL STDCALL
+IntEngAlphaBlend(IN SURFOBJ *Dest,
+ IN SURFOBJ *Source,
+ IN CLIPOBJ *Clip,
+ IN XLATEOBJ *ColorTranslation,
+ IN PRECTL DestRect,
+ IN PRECTL SourceRect,
+ IN BLENDOBJ *BlendObj)
+{
+ BOOL ret = FALSE;
+ BITMAPOBJ *DestObj;
+ BITMAPOBJ *SourceObj;
+
+ ASSERT(Dest);
+ DestObj = CONTAINING_RECORD(Dest, BITMAPOBJ, SurfObj);
+ ASSERT(DestObj);
+
+ ASSERT(Source);
+ SourceObj = CONTAINING_RECORD(Source, BITMAPOBJ, SurfObj);
+ ASSERT(SourceObj);
+
+ ASSERT(DestRect);
+ ASSERT(SourceRect);
+
+ BITMAPOBJ_LockBitmapBits(DestObj);
+ MouseSafetyOnDrawStart(Dest, DestRect->left, DestRect->top,
+ DestRect->right, DestRect->bottom);
+
+ if (Source != Dest)
+ BITMAPOBJ_LockBitmapBits(SourceObj);
+ MouseSafetyOnDrawStart(Source, SourceRect->left,
SourceRect->top,
+ SourceRect->right, SourceRect->bottom);
+
+ /* Call the driver's DrvAlphaBlend if available */
+ if (DestObj->flHooks & HOOK_ALPHABLEND)
+ {
+ ret = GDIDEVFUNCS(Dest).AlphaBlend(
+ Dest, Source, Clip, ColorTranslation,
+ DestRect, SourceRect, BlendObj);
+ }
+
+ if (! ret)
+ {
+ ret = EngAlphaBlend(Dest, Source, Clip,
ColorTranslation,
+ DestRect, SourceRect, BlendObj);
+ }
+
+ MouseSafetyOnDrawEnd(Source);
+ if (Source != Dest)
+ BITMAPOBJ_UnlockBitmapBits(SourceObj);
+ MouseSafetyOnDrawEnd(Dest);
+ BITMAPOBJ_UnlockBitmapBits(DestObj);
+
+ return ret;
+}
+
/**** REACTOS FONT RENDERING CODE
*********************************************/
/* renders the alpha mask bitmap */
_____
Modified: trunk/reactos/subsys/win32k/include/inteng.h
--- trunk/reactos/subsys/win32k/include/inteng.h 2005-10-30
22:14:11 UTC (rev 18895)
+++ trunk/reactos/subsys/win32k/include/inteng.h 2005-10-30
22:16:30 UTC (rev 18896)
@@ -162,5 +162,14 @@
IN LONG y,
IN RECTL *prcl);
+BOOL STDCALL
+IntEngAlphaBlend(IN SURFOBJ *Dest,
+ IN SURFOBJ *Source,
+ IN CLIPOBJ *Clip,
+ IN XLATEOBJ *ColorTranslation,
+ IN PRECTL DestRect,
+ IN PRECTL SourceRect,
+ IN BLENDOBJ *BlendObj);
+
#endif /* _WIN32K_INTENG_H */
_____
Modified: trunk/reactos/subsys/win32k/objects/bitmaps.c
--- trunk/reactos/subsys/win32k/objects/bitmaps.c 2005-10-30
22:14:11 UTC (rev 18895)
+++ trunk/reactos/subsys/win32k/objects/bitmaps.c 2005-10-30
22:16:30 UTC (rev 18896)
@@ -1284,6 +1284,145 @@
return Status;
}
+BOOL STDCALL
+NtGdiAlphaBlend(
+ HDC hDCDest,
+ INT XOriginDest,
+ INT YOriginDest,
+ INT WidthDest,
+ INT HeightDest,
+ HDC hDCSrc,
+ INT XOriginSrc,
+ INT YOriginSrc,
+ INT WidthSrc,
+ INT HeightSrc,
+ BLENDFUNCTION BlendFunc)
+{
+ PDC DCDest = NULL;
+ PDC DCSrc = NULL;
+ BITMAPOBJ *BitmapDest, *BitmapSrc;
+ RECTL DestRect, SourceRect;
+ BOOL Status;
+ XLATEOBJ *XlateObj;
+ BLENDOBJ BlendObj = {BlendFunc};
+ HPALETTE SourcePalette = 0, DestPalette = 0;
+
+ DCDest = DC_LockDc(hDCDest);
+ if (NULL == DCDest)
+ {
+ DPRINT1("Invalid destination dc handle (0x%08x) passed
to NtGdiAlphaBlend\n", hDCDest);
+ SetLastWin32Error(ERROR_INVALID_HANDLE);
+ return FALSE;
+ }
+ if (DCDest->IsIC)
+ {
+ DC_UnlockDc(DCDest);
+ /* Yes, Windows really returns TRUE in this case */
+ return TRUE;
+ }
+
+ if (hDCSrc != hDCDest)
+ {
+ DCSrc = DC_LockDc(hDCSrc);
+ if (NULL == DCSrc)
+ {
+ DC_UnlockDc(DCDest);
+ DPRINT1("Invalid source dc handle (0x%08x)
passed to NtGdiBitBlt\n", hDCSrc);
+ SetLastWin32Error(ERROR_INVALID_HANDLE);
+ return FALSE;
+ }
+ if (DCSrc->IsIC)
+ {
+ DC_UnlockDc(DCSrc);
+ DC_UnlockDc(DCDest);
+ /* Yes, Windows really returns TRUE in this case
*/
+ return TRUE;
+ }
+ }
+ else
+ {
+ DCSrc = DCDest;
+ }
+
+ /* Offset the destination and source by the origin of their DCs.
*/
+ XOriginDest += DCDest->w.DCOrgX;
+ YOriginDest += DCDest->w.DCOrgY;
+ XOriginSrc += DCSrc->w.DCOrgX;
+ YOriginSrc += DCSrc->w.DCOrgY;
+
+ DestRect.left = XOriginDest;
+ DestRect.top = YOriginDest;
+ DestRect.right = XOriginDest + WidthDest;
+ DestRect.bottom = YOriginDest + HeightDest;
+
+ SourceRect.left = XOriginSrc;
+ SourceRect.top = YOriginSrc;
+ SourceRect.right = XOriginSrc + WidthSrc;
+ SourceRect.bottom = YOriginSrc + HeightSrc;
+
+ /* Determine surfaces to be used in the bitblt */
+ BitmapDest = BITMAPOBJ_LockBitmap(DCDest->w.hBitmap);
+ if (DCSrc->w.hBitmap == DCDest->w.hBitmap)
+ BitmapSrc = BitmapDest;
+ else
+ BitmapSrc = BITMAPOBJ_LockBitmap(DCSrc->w.hBitmap);
+
+ /* Create the XLATEOBJ. */
+ if (DCDest->w.hPalette != 0)
+ DestPalette = DCDest->w.hPalette;
+ if (DCSrc->w.hPalette != 0)
+ SourcePalette = DCSrc->w.hPalette;
+
+ /* KB41464 details how to convert between mono and color */
+ if (DCDest->w.bitsPerPixel == 1 && DCSrc->w.bitsPerPixel == 1)
+ {
+ XlateObj = NULL;
+ }
+ else
+ {
+ if (DCDest->w.bitsPerPixel == 1)
+ {
+ XlateObj = IntEngCreateMonoXlate(0, DestPalette,
SourcePalette, DCSrc->w.backgroundColor);
+ }
+ else if (DCSrc->w.bitsPerPixel == 1)
+ {
+ XlateObj = IntEngCreateSrcMonoXlate(DestPalette,
DCSrc->w.backgroundColor, DCSrc->w.textColor);
+ }
+ else
+ {
+ XlateObj = IntEngCreateXlate(0, 0, DestPalette,
SourcePalette);
+ }
+ if (NULL == XlateObj)
+ {
+ BITMAPOBJ_UnlockBitmap(BitmapDest);
+ if (BitmapSrc != BitmapDest)
+ BITMAPOBJ_UnlockBitmap(BitmapSrc);
+ DC_UnlockDc(DCDest);
+ if (hDCSrc != hDCDest)
+ DC_UnlockDc(DCSrc);
+ SetLastWin32Error(ERROR_NO_SYSTEM_RESOURCES);
+ return FALSE;
+ }
+ }
+
+ /* Perform the alpha blend operation */
+ Status = IntEngAlphaBlend(&BitmapDest->SurfObj,
&BitmapSrc->SurfObj,
+ DCDest->CombinedClip, XlateObj,
+ &DestRect, &SourceRect, &BlendObj);
+
+ if (XlateObj != NULL)
+ EngDeleteXlate(XlateObj);
+
+ BITMAPOBJ_UnlockBitmap(BitmapDest);
+ if (BitmapSrc != BitmapDest)
+ BITMAPOBJ_UnlockBitmap(BitmapSrc);
+ DC_UnlockDc(DCDest);
+ if (hDCSrc != hDCDest)
+ DC_UnlockDc(DCSrc);
+
+ return Status;
+}
+
/* Internal Functions */
INT FASTCALL