gdi32: Avoid making a copy of the device clipping region in the DIB driver.

dlls/gdi32/dibdrv/bitblt.c

@@ -929,7 +929,7 @@ DWORD dibdrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *info
     struct clipped_rects clipped_rects;
     DWORD ret;
     dib_info src_dib;
-    HRGN saved_clip = NULL;
+    HRGN tmp_rgn = 0;
     dibdrv_physdev *pdev = NULL;
 
     TRACE( "%p %p %p\n", dev, hbitmap, info );
@@ -972,8 +972,13 @@ DWORD dibdrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *info
 
     if (!hbitmap)
     {
-        if (clip) saved_clip = add_extra_clipping_region( pdev, clip );
-        clip = pdev->clip;
+        if (clip && pdev->clip)
+        {
+            tmp_rgn = CreateRectRgn( 0, 0, 0, 0 );
+            CombineRgn( tmp_rgn, clip, pdev->clip, RGN_AND );
+            clip = tmp_rgn;
+        }
+        else if (!clip) clip = pdev->clip;
     }
 
     if (!get_clipped_rects( dib, &dst->visrect, clip, &clipped_rects ))
@@ -1000,7 +1005,7 @@ update_format:
     ret = ERROR_BAD_FORMAT;
 
 done:
-    if (saved_clip) restore_clipping_region( pdev, saved_clip );
+    if (tmp_rgn) DeleteObject( tmp_rgn );
     if (hbitmap) GDI_ReleaseObj( hbitmap );
     return ret;
 }

dlls/gdi32/dibdrv/dc.c

@@ -298,33 +298,6 @@ int get_clipped_rects( const dib_info *dib, const RECT *rc, HRGN clip, struct cl
     return clip_rects->count;
 }
 
-/***********************************************************************
- *           add_extra_clipping_region
- *
- * Temporarily add a region to the current clipping region.
- * The returned region must be restored with restore_clipping_region.
- */
-HRGN add_extra_clipping_region( dibdrv_physdev *pdev, HRGN rgn )
-{
-    HRGN ret, clip;
-
-    if (!(clip = CreateRectRgn( 0, 0, 0, 0 ))) return 0;
-    CombineRgn( clip, pdev->clip, rgn, RGN_AND );
-    ret = pdev->clip;
-    pdev->clip = clip;
-    return ret;
-}
-
-/***********************************************************************
- *           restore_clipping_region
- */
-void restore_clipping_region( dibdrv_physdev *pdev, HRGN rgn )
-{
-    if (!rgn) return;
-    DeleteObject( pdev->clip );
-    pdev->clip = rgn;
-}
-
 /**********************************************************************
  *	     dibdrv_CreateDC
  */
@@ -334,11 +307,6 @@ static BOOL dibdrv_CreateDC( PHYSDEV *dev, LPCWSTR driver, LPCWSTR device,
     dibdrv_physdev *pdev = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*pdev) );
 
     if (!pdev) return FALSE;
-    if (!(pdev->clip = CreateRectRgn(0, 0, 0, 0)))
-    {
-        HeapFree( GetProcessHeap(), 0, pdev );
-        return FALSE;
-    }
     clear_dib_info(&pdev->dib);
     clear_dib_info(&pdev->brush_dib);
     push_dc_driver( dev, &pdev->dev, &dib_driver );
@@ -352,7 +320,6 @@ static BOOL dibdrv_DeleteDC( PHYSDEV dev )
 {
     dibdrv_physdev *pdev = get_dibdrv_pdev(dev);
     TRACE("(%p)\n", dev);
-    DeleteObject(pdev->clip);
     free_pattern_brush(pdev);
     HeapFree( GetProcessHeap(), 0, pdev );
     return TRUE;
@@ -409,8 +376,7 @@ static void dibdrv_SetDeviceClipping( PHYSDEV dev, HRGN rgn )
     dibdrv_physdev *pdev = get_dibdrv_pdev(dev);
     TRACE("(%p, %p)\n", dev, rgn);
 
-    SetRectRgn( pdev->clip, 0, 0, pdev->dib.width, pdev->dib.height );
-    if (rgn) CombineRgn( pdev->clip, pdev->clip, rgn, RGN_AND );
+    pdev->clip = rgn;
     return next->funcs->pSetDeviceClipping( next, rgn );
 }
 

dlls/gdi32/dibdrv/dibdrv.h

@@ -232,8 +232,6 @@ extern COLORREF make_rgb_colorref( HDC hdc, dib_info *dib, COLORREF color, BOOL
 extern DWORD get_pixel_color(dibdrv_physdev *pdev, COLORREF color, BOOL mono_fixup) DECLSPEC_HIDDEN;
 extern BOOL brush_rect( dibdrv_physdev *pdev, const RECT *rect ) DECLSPEC_HIDDEN;
 extern int get_clipped_rects( const dib_info *dib, const RECT *rc, HRGN clip, struct clipped_rects *clip_rects ) DECLSPEC_HIDDEN;
-extern HRGN add_extra_clipping_region( dibdrv_physdev *pdev, HRGN rgn ) DECLSPEC_HIDDEN;
-extern void restore_clipping_region( dibdrv_physdev *pdev, HRGN rgn ) DECLSPEC_HIDDEN;
 extern int clip_line(const POINT *start, const POINT *end, const RECT *clip,
                      const bres_params *params, POINT *pt1, POINT *pt2) DECLSPEC_HIDDEN;