Evgeniy Boltik <bstsoft@narod.ru>

- Move clipping from StretchBlt to Eng.
- Add ROP support to StretchBlt.
- Fix alphablend support (alphablend.exe produces same result as tested on Windows XP).

See issue #4156 for more details.

svn path=/trunk/; revision=40048

reactos/subsystems/win32/win32k/dib/dib.c

@@ -224,10 +224,12 @@ BOOLEAN Dummy_BitBlt(PBLTINFO BltInfo)
 }
 
 BOOLEAN Dummy_StretchBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
+                         SURFOBJ *PatternSurface,
                          RECTL*  DestRect,  RECTL  *SourceRect,
                          POINTL* MaskOrigin, BRUSHOBJ* Brush,
-                         POINTL* BrushOrign, CLIPOBJ *ClipRegion, 
-                         XLATEOBJ *ColorTranslation, ROP4 Rop)
+                         POINTL* BrushOrign,
+                         XLATEOBJ *ColorTranslation,
+                         XLATEOBJ *XlatePatternToDest, ROP4 Rop)
 {
   return FALSE;
 }

reactos/subsystems/win32/win32k/dib/dib.h

@@ -41,7 +41,7 @@ typedef ULONG (*PFN_DIB_GetPixel)(SURFOBJ*,LONG,LONG);
 typedef VOID (*PFN_DIB_HLine)(SURFOBJ*,LONG,LONG,LONG,ULONG);
 typedef VOID (*PFN_DIB_VLine)(SURFOBJ*,LONG,LONG,LONG,ULONG);
 typedef BOOLEAN (*PFN_DIB_BitBlt)(PBLTINFO);
-typedef BOOLEAN (*PFN_DIB_StretchBlt)(SURFOBJ*,SURFOBJ*,RECTL*,RECTL*,POINTL*,BRUSHOBJ*,POINTL*,CLIPOBJ*,XLATEOBJ*,ROP4);
+typedef BOOLEAN (*PFN_DIB_StretchBlt)(SURFOBJ*,SURFOBJ*,SURFOBJ*,RECTL*,RECTL*,POINTL*,BRUSHOBJ*,POINTL*,XLATEOBJ*,XLATEOBJ*,ROP4);
 typedef BOOLEAN (*PFN_DIB_TransparentBlt)(SURFOBJ*,SURFOBJ*,RECTL*,POINTL*,XLATEOBJ*,ULONG);
 typedef BOOLEAN (*PFN_DIB_ColorFill)(SURFOBJ*, RECTL*, ULONG);
 typedef BOOLEAN (*PFN_DIB_AlphaBlend)(SURFOBJ*, SURFOBJ*, RECTL*, RECTL*, CLIPOBJ*, XLATEOBJ*, BLENDOBJ*);
@@ -67,7 +67,7 @@ ULONG Dummy_GetPixel(SURFOBJ*,LONG,LONG);
 VOID Dummy_HLine(SURFOBJ*,LONG,LONG,LONG,ULONG);
 VOID Dummy_VLine(SURFOBJ*,LONG,LONG,LONG,ULONG);
 BOOLEAN Dummy_BitBlt(PBLTINFO);
-BOOLEAN Dummy_StretchBlt(SURFOBJ*,SURFOBJ*,RECTL*,RECTL*,POINTL*,BRUSHOBJ*,POINTL*,CLIPOBJ*,XLATEOBJ*,ROP4);
+BOOLEAN Dummy_StretchBlt(SURFOBJ*,SURFOBJ*,SURFOBJ*,RECTL*,RECTL*,POINTL*,BRUSHOBJ*,POINTL*,XLATEOBJ*,XLATEOBJ*,ROP4);
 BOOLEAN Dummy_TransparentBlt(SURFOBJ*,SURFOBJ*,RECTL*,POINTL*,XLATEOBJ*,ULONG);
 BOOLEAN Dummy_ColorFill(SURFOBJ*, RECTL*, ULONG);
 BOOLEAN Dummy_AlphaBlend(SURFOBJ*, SURFOBJ*, RECTL*, RECTL*, CLIPOBJ*, XLATEOBJ*, BLENDOBJ*);
@@ -132,7 +132,7 @@ BOOLEAN DIB_32BPP_TransparentBlt(SURFOBJ*,SURFOBJ*,RECTL*,POINTL*,XLATEOBJ*,ULON
 BOOLEAN DIB_32BPP_ColorFill(SURFOBJ*, RECTL*, ULONG);
 BOOLEAN DIB_32BPP_AlphaBlend(SURFOBJ*, SURFOBJ*, RECTL*, RECTL*, CLIPOBJ*, XLATEOBJ*, BLENDOBJ*);
 
-BOOLEAN DIB_XXBPP_StretchBlt(SURFOBJ*,SURFOBJ*,RECTL*,RECTL*,POINTL*,BRUSHOBJ*,POINTL*,CLIPOBJ*,XLATEOBJ*,ROP4);
+BOOLEAN DIB_XXBPP_StretchBlt(SURFOBJ*,SURFOBJ*,SURFOBJ*,RECTL*,RECTL*,POINTL*,BRUSHOBJ*,POINTL*,XLATEOBJ*,XLATEOBJ*,ROP4);
 
 extern unsigned char notmask[2];
 extern unsigned char altnotmask[2];

reactos/subsystems/win32/win32k/dib/dibXXbpp.c

@@ -23,42 +23,33 @@
 #include <debug.h>
 
 BOOLEAN DIB_XXBPP_StretchBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
+                            SURFOBJ *PatternSurface,
                             RECTL *DestRect, RECTL *SourceRect,
                             POINTL *MaskOrigin, BRUSHOBJ *Brush,
-                            POINTL *BrushOrigin, CLIPOBJ *ClipRegion, 
-                            XLATEOBJ *ColorTranslation, ROP4 ROP)
+                            POINTL *BrushOrigin, XLATEOBJ *ColorTranslation,
+                            XLATEOBJ *XlatePatternToDest, ROP4 ROP)
 {
-    LONG SrcSizeY;
-    LONG SrcSizeX;
-    LONG DesSizeY;
-    LONG DesSizeX;
     LONG sx = 0;
     LONG sy = 0;
     LONG DesX;
     LONG DesY;
 
-    LONG SrcZoomXHight;
-    LONG SrcZoomXLow;
-    LONG SrcZoomYHight;
-    LONG SrcZoomYLow;
+    LONG DstHeight;
+    LONG DstWidth;
+    LONG SrcHeight;
+    LONG SrcWidth;
 
-    LONG sy_dec = 0;
-    LONG sy_max;
-
-    LONG sx_dec = 0;
-    LONG sx_max;
-    ULONG color;
+    ULONG Color;
     ULONG Dest, Source = 0, Pattern = 0;
     ULONG xxBPPMask;
+    BOOLEAN CanDraw;
 
     PFN_DIB_GetPixel fnSource_GetPixel = NULL;
     PFN_DIB_GetPixel fnDest_GetPixel = NULL;
     PFN_DIB_PutPixel fnDest_PutPixel = NULL;
+    PFN_DIB_GetPixel fnPattern_GetPixel = NULL;
 
-    RECT_ENUM RectEnum;
-    BOOL EnumMore;
-    unsigned i;
-    RECTL OutputRect;
+    ULONG PatternX = 0, PatternY = 0;
 
     BOOL UsesSource = ROP4_USES_SOURCE(ROP);
     BOOL UsesPattern = ROP4_USES_PATTERN(ROP);
@@ -76,30 +67,12 @@ BOOLEAN DIB_XXBPP_StretchBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
             BitsPerFormat(SourceSurf->iBitmapFormat), SourceRect->left, SourceRect->top, SourceRect->right, SourceRect->bottom);
     }
 
-    /* Calc the Zoom height of Source */
-    SrcSizeY = SourceRect->bottom - SourceRect->top;
+    DstHeight = DestRect->bottom - DestRect->top;
+    DstWidth = DestRect->right - DestRect->left;
+    SrcHeight = SourceRect->bottom - SourceRect->top;
+    SrcWidth = SourceRect->right - SourceRect->left;
 
-    /* Calc the Zoom Width of Source */
-    SrcSizeX = SourceRect->right - SourceRect->left;
-
-    /* Calc the Zoom height of Destinations */
-    DesSizeY = DestRect->bottom - DestRect->top;
-
-    /* Calc the Zoom width of Destinations */
-    DesSizeX = DestRect->right - DestRect->left;
-
-    /* Calc the zoom factor of source height */
-    SrcZoomYHight = SrcSizeY / DesSizeY;
-    SrcZoomYLow = SrcSizeY - (SrcZoomYHight * DesSizeY);
-
-    /* Calc the zoom factor of source width */
-    SrcZoomXHight = SrcSizeX / DesSizeX;
-    SrcZoomXLow = SrcSizeX - (SrcZoomXHight * DesSizeX);
-
-    sx_max = DesSizeX;
-    sy_max = DesSizeY;
-
-    /* FIXME :  MaskOrigin, BrushOrigin? */
+    /* FIXME :  MaskOrigin? */
 
     switch(DestSurf->iBitmapFormat)
     {
@@ -114,73 +87,76 @@ BOOLEAN DIB_XXBPP_StretchBlt(SURFOBJ *DestSurf, SURFOBJ *SourceSurf,
 
     if (UsesPattern)
     {
-        DPRINT1("StretchBlt does not support pattern ROPs yet\n");
-        return TRUE;
-    }
-    
-    CLIPOBJ_cEnumStart(ClipRegion, FALSE, CT_RECTANGLES, CD_ANY, 0);
-    do
-    {
-        EnumMore = CLIPOBJ_bEnum(ClipRegion,(ULONG) sizeof(RectEnum), (PVOID) &RectEnum);
-
-        for (i = 0; i < RectEnum.c; i++)
+        if (PatternSurface)
         {
-            OutputRect.left = RectEnum.arcl[i].left;
-            OutputRect.right = RectEnum.arcl[i].right;
-            OutputRect.top = RectEnum.arcl[i].top;
-            OutputRect.bottom = RectEnum.arcl[i].bottom;
-                
-            sy = SourceRect->top;
-            sy_dec = 0;
-            for (DesY=DestRect->top; DesY<DestRect->bottom; DesY++)
+            PatternY = (DestRect->top - BrushOrigin->y) % PatternSurface->sizlBitmap.cy;
+            if (PatternY < 0)
             {
-                sx = SourceRect->left;
-                sx_dec = 0;
-
-                for (DesX=DestRect->left; DesX<DestRect->right; DesX++)
-                {
-                    /* Check if inside clip region */
-                    if (DesX >= OutputRect.left &&
-                        DesX < OutputRect.right &&
-                        DesY >= OutputRect.top &&
-                        DesY < OutputRect.bottom)
-                    {
-                        if (UsesSource) 
-                        {
-                            Source = XLATEOBJ_iXlate(ColorTranslation, fnSource_GetPixel(SourceSurf, sx, sy));
-                        }
-
-                        if (UsesPattern)
-                        {
-                            /* TBD as soon as BRUSHOBJ is available */
-                        }
-
-                        Dest = fnDest_GetPixel(DestSurf, DesX, DesY);
-                        color = DIB_DoRop(ROP, Dest, Source, Pattern) & xxBPPMask;
-
-                        fnDest_PutPixel(DestSurf, DesX, DesY, color);
-
-                    }
-                    sx += SrcZoomXHight;
-                    sx_dec += SrcZoomXLow;
-                    if (sx_dec >= sx_max)
-                    {
-                        sx++;
-                        sx_dec -= sx_max;
-                    }
-                }
-
-                sy += SrcZoomYHight;
-                sy_dec += SrcZoomYLow;
-                if (sy_dec >= sy_max)
-                {
-                    sy++;
-                    sy_dec -= sy_max;
-                }
+                PatternY += PatternSurface->sizlBitmap.cy;
             }
+            fnPattern_GetPixel = DibFunctionsForBitmapFormat[PatternSurface->iBitmapFormat].DIB_GetPixel;
+        }
+        else
+        {
+            if (Brush)
+                Pattern = Brush->iSolidColor;
+        }
+    }
+
+
+    for (DesY = DestRect->top; DesY < DestRect->bottom; DesY++)
+    {
+        if (PatternSurface)
+        {
+            PatternX = (DestRect->left - BrushOrigin->x) % PatternSurface->sizlBitmap.cx;
+            if (PatternX < 0)
+            {
+                PatternX += PatternSurface->sizlBitmap.cx;
+            }
+        }
+        if (UsesSource)
+          sy = SourceRect->top+(DesY - DestRect->top) * SrcHeight / DstHeight;
+
+        for (DesX = DestRect->left; DesX < DestRect->right; DesX++)
+        {
+            CanDraw = TRUE;
+            if (UsesSource)
+            {
+                sx = SourceRect->left+(DesX - DestRect->left) * SrcWidth / DstWidth;
+                if (sx >= 0 && sy >= 0 &&
+                    SourceSurf->sizlBitmap.cx > sx && SourceSurf->sizlBitmap.cy > sy)
+                {
+                     Source = XLATEOBJ_iXlate(ColorTranslation, fnSource_GetPixel(SourceSurf, sx, sy));
+                }
+                else 
+                {
+                     Source = 0;
+                     CanDraw = (ROP3_TO_ROP4(SRCCOPY) != ROP);
+                }
+            }
+
+            if (CanDraw)
+            {
+                if (PatternSurface)
+                {
+                    Pattern = XLATEOBJ_iXlate(XlatePatternToDest, fnPattern_GetPixel(PatternSurface, PatternX, PatternY));
+                    PatternX++;
+                    PatternX %= PatternSurface->sizlBitmap.cx;
+                }
+
+                Dest = fnDest_GetPixel(DestSurf, DesX, DesY);
+                Color = DIB_DoRop(ROP, Dest, Source, Pattern) & xxBPPMask;
+
+                fnDest_PutPixel(DestSurf, DesX, DesY, Color);
+            }
+        }
+
+        if (PatternSurface)
+        {
+            PatternY++;
+            PatternY %= PatternSurface->sizlBitmap.cy;
         }
     }
-    while (EnumMore);
 
     return TRUE;
 }

reactos/subsystems/win32/win32k/eng/bitblt.c

@@ -45,7 +45,6 @@ typedef BOOLEAN (APIENTRY *PBLTRECTFUNC)(SURFOBJ* OutputObj,
 typedef BOOLEAN (APIENTRY *PSTRETCHRECTFUNC)(SURFOBJ* OutputObj,
                                             SURFOBJ* InputObj,
                                             SURFOBJ* Mask,
-                                            CLIPOBJ* ClipRegion,
                                             XLATEOBJ* ColorTranslation,
                                             RECTL* OutputRect,
                                             RECTL* InputRect,
@@ -737,7 +736,6 @@ static BOOLEAN APIENTRY
 CallDibStretchBlt(SURFOBJ* psoDest,
                   SURFOBJ* psoSource,
                   SURFOBJ* Mask,
-                  CLIPOBJ* ClipRegion,
                   XLATEOBJ* ColorTranslation,
                   RECTL* OutputRect,
                   RECTL* InputRect,
@@ -747,6 +745,11 @@ CallDibStretchBlt(SURFOBJ* psoDest,
                   ROP4 Rop4)
 {
     POINTL RealBrushOrigin;
+    SURFACE* psurfPattern;
+    PGDIBRUSHINST GdiBrush = NULL;
+    SURFOBJ* PatternSurface = NULL;
+    XLATEOBJ* XlatePatternToDest = NULL;
+
     if (BrushOrigin == NULL)
     {
         RealBrushOrigin.x = RealBrushOrigin.y = 0;
@@ -755,8 +758,37 @@ CallDibStretchBlt(SURFOBJ* psoDest,
     {
         RealBrushOrigin = *BrushOrigin;
     }
+
+    /* Pattern brush */
+    if (ROP4_USES_PATTERN(Rop4) && Brush && Brush->iSolidColor == 0xFFFFFFFF)
+    {
+        GdiBrush = CONTAINING_RECORD(Brush, GDIBRUSHINST, BrushObject);
+        psurfPattern = SURFACE_LockSurface(GdiBrush->GdiBrushObject->hbmPattern);
+        if (psurfPattern)
+        {
+            PatternSurface = &psurfPattern->SurfObj;
+        }
+        else
+        {
+            /* FIXME - What to do here? */
+        }
+        XlatePatternToDest = GdiBrush->XlateObject;
+    }
+    else
+    {
+        psurfPattern = NULL;
+    }
+
     return DibFunctionsForBitmapFormat[psoDest->iBitmapFormat].DIB_StretchBlt(
-               psoDest, psoSource, OutputRect, InputRect, MaskOrigin, Brush, &RealBrushOrigin, ClipRegion, ColorTranslation, Rop4);
+               psoDest, psoSource, PatternSurface, 
+               OutputRect, InputRect, MaskOrigin, Brush, &RealBrushOrigin, 
+               ColorTranslation, XlatePatternToDest, Rop4);
+
+    /* Pattern brush */
+    if (psurfPattern)
+    {
+        SURFACE_UnlockSurface(psurfPattern);
+    }
 }
 
 
@@ -836,10 +868,34 @@ EngStretchBltROP(
     SURFOBJ*           psoInput;
     SURFOBJ*           psoOutput;
     PSTRETCHRECTFUNC   BltRectFunc;
-    BOOLEAN            Ret;
+    BOOLEAN            Ret = TRUE;
     POINTL             AdjustedBrushOrigin;
     BOOL               UsesSource = ROP4_USES_SOURCE(ROP4);
 
+    BYTE               clippingType;
+    RECTL              ClipRect;
+    RECT_ENUM          RectEnum;
+    BOOL               EnumMore;
+    ULONG              Direction;
+    RECTL              CombinedRect;
+    RECTL              InputToCombinedRect;
+    unsigned           i;
+
+    LONG DstHeight;
+    LONG DstWidth;
+    LONG SrcHeight;
+    LONG SrcWidth;
+
+    /* Determine clipping type */
+    if (ClipRegion == (CLIPOBJ *) NULL)
+    {
+        clippingType = DC_TRIVIAL;
+    }
+    else
+    {
+        clippingType = ClipRegion->iDComplexity;
+    }
+
     if (ROP4 == R4_NOOP)
     {
         /* Copy destination onto itself: nop */
@@ -866,18 +922,6 @@ EngStretchBltROP(
             return FALSE;
         }
 
-        /* Make sure we don't try to copy anything outside the valid source region */
-        if (InputRect.left < 0)
-        {
-            OutputRect.left -= InputRect.left;
-            InputRect.left = 0;
-        }
-        if (InputRect.top < 0)
-        {
-            OutputRect.top -= InputRect.top;
-            InputRect.top = 0;
-        }
-
         if (! IntEngEnter(&EnterLeaveSource, psoSource, &InputRect, TRUE,
                           &Translate, &psoInput))
         {
@@ -965,9 +1009,88 @@ EngStretchBltROP(
         BltRectFunc = CallDibStretchBlt;
     }
 
-    Ret = (*BltRectFunc)(psoOutput, psoInput, Mask, ClipRegion,
+    DstHeight = OutputRect.bottom - OutputRect.top;
+    DstWidth = OutputRect.right - OutputRect.left;
+    SrcHeight = InputRect.bottom - InputRect.top;
+    SrcWidth = InputRect.right - InputRect.left;
+    switch (clippingType)
+    {
+        case DC_TRIVIAL:
+            Ret = (*BltRectFunc)(psoOutput, psoInput, Mask, 
                          ColorTranslation, &OutputRect, &InputRect, MaskOrigin,
                          Brush, &AdjustedBrushOrigin, ROP4);
+            break;
+        case DC_RECT:
+            // Clip the blt to the clip rectangle 
+            ClipRect.left = ClipRegion->rclBounds.left + Translate.x;
+            ClipRect.right = ClipRegion->rclBounds.right + Translate.x;
+            ClipRect.top = ClipRegion->rclBounds.top + Translate.y;
+            ClipRect.bottom = ClipRegion->rclBounds.bottom + Translate.y;
+            if (EngIntersectRect(&CombinedRect, &OutputRect, &ClipRect))
+            {
+                InputToCombinedRect.top = InputRect.top + (CombinedRect.top - OutputRect.top) * SrcHeight / DstHeight;
+                InputToCombinedRect.bottom = InputRect.top + (CombinedRect.bottom - OutputRect.top) * SrcHeight / DstHeight;
+                InputToCombinedRect.left = InputRect.left + (CombinedRect.left - OutputRect.left) * SrcWidth / DstWidth;
+                InputToCombinedRect.right = InputRect.left + (CombinedRect.right - OutputRect.left) * SrcWidth / DstWidth;
+                Ret = (*BltRectFunc)(psoOutput, psoInput, Mask, 
+                           ColorTranslation, 
+                           &CombinedRect,
+                           &InputToCombinedRect,
+                           MaskOrigin,
+                           Brush, 
+                           &AdjustedBrushOrigin, 
+                           ROP4);
+            }
+            break;
+        case DC_COMPLEX:
+            if (psoOutput == psoInput)
+            {
+                if (OutputRect.top < InputRect.top)
+                {
+                    Direction = OutputRect.left < InputRect.left ?
+                                CD_RIGHTDOWN : CD_LEFTDOWN;
+                }
+                else
+                {
+                    Direction = OutputRect.left < InputRect.left ?
+                                CD_RIGHTUP : CD_LEFTUP;
+                }
+            }
+            else
+            {
+                Direction = CD_ANY;
+            }
+            CLIPOBJ_cEnumStart(ClipRegion, FALSE, CT_RECTANGLES, Direction, 0);
+            do
+            {
+                EnumMore = CLIPOBJ_bEnum(ClipRegion,(ULONG) sizeof(RectEnum),
+                                         (PVOID) &RectEnum);
+                for (i = 0; i < RectEnum.c; i++)
+                {
+                    ClipRect.left = RectEnum.arcl[i].left + Translate.x;
+                    ClipRect.right = RectEnum.arcl[i].right + Translate.x;
+                    ClipRect.top = RectEnum.arcl[i].top + Translate.y;
+                    ClipRect.bottom = RectEnum.arcl[i].bottom + Translate.y;
+                    if (EngIntersectRect(&CombinedRect, &OutputRect, &ClipRect))
+                    {
+                        InputToCombinedRect.top = InputRect.top + (CombinedRect.top - OutputRect.top) * SrcHeight / DstHeight;
+                        InputToCombinedRect.bottom = InputRect.top + (CombinedRect.bottom - OutputRect.top) * SrcHeight / DstHeight;
+                        InputToCombinedRect.left = InputRect.left + (CombinedRect.left - OutputRect.left) * SrcWidth / DstWidth;
+                        InputToCombinedRect.right = InputRect.left + (CombinedRect.right - OutputRect.left) * SrcWidth / DstWidth;
+                        Ret = (*BltRectFunc)(psoOutput, psoInput, Mask, 
+                           ColorTranslation, 
+                           &CombinedRect,
+                           &InputToCombinedRect,
+                           MaskOrigin,
+                           Brush, 
+                           &AdjustedBrushOrigin, 
+                           ROP4);
+                    }
+                }
+            }
+            while (EnumMore);
+            break;
+    }
 
     IntEngLeave(&EnterLeaveDest);
     if (UsesSource)
@@ -1061,18 +1184,6 @@ IntEngStretchBlt(SURFOBJ *psoDest,
         }
         InputRect = *SourceRect;
  
-        /* Make sure we don't try to copy anything outside the valid source region */
-        if (InputRect.left < 0)
-        {
-            InputClippedRect.left -= InputRect.left;
-            InputRect.left = 0;
-        }
-        if (InputRect.top < 0)
-        {
-            InputClippedRect.top -= InputRect.top;
-            InputRect.top = 0;
-        }
-
         if (InputClippedRect.right < InputClippedRect.left ||
                 InputClippedRect.bottom < InputClippedRect.top)
         {
@@ -1129,19 +1240,18 @@ IntEngStretchBlt(SURFOBJ *psoDest,
     /* Prepare color adjustment */
 
     /* Call the driver's DrvStretchBlt if available */
-    if (psurfDest->flHooks & HOOK_STRETCHBLT)
+    if (psurfDest->flHooks & HOOK_STRETCHBLTROP)
     {
-        /* Drv->StretchBlt (look at http://www.osr.com/ddk/graphics/ddifncs_3ew7.htm ) */
+        /* Drv->StretchBltROP (look at http://www.osronline.com/ddkx/graphics/ddifncs_0z3b.htm ) */
         // FIXME: MaskOrigin is always NULL !
-        ret = GDIDEVFUNCS(psoDest).StretchBlt(
-                  psoDest, (UsesSource) ? psoSource : NULL, MaskSurf, ClipRegion, ColorTranslation,
-                  &ca, BrushOrigin, &OutputRect, &InputRect, NULL, ROP);
+        ret = GDIDEVFUNCS(psoDest).StretchBltROP(psoDest, (UsesSource) ? psoSource : NULL, MaskSurf, ClipRegion, ColorTranslation,
+                  &ca, BrushOrigin, &OutputRect, &InputRect, NULL, COLORONCOLOR, Brush, ROP);
     }
 
     if (! ret)
     {
         // FIXME: see previous fixme
-        ret = EngStretchBltROP(psoDest, psoSource, MaskSurf, ClipRegion, ColorTranslation,
+        ret = EngStretchBltROP(psoDest, (UsesSource) ? psoSource : NULL, MaskSurf, ClipRegion, ColorTranslation,
                             &ca, BrushOrigin, &OutputRect, &InputRect, NULL, COLORONCOLOR, Brush, ROP);
     }