* in FillRegion(), check if the current drawing mode is B_OP_INVERT,

and then use hardware acceleration... found out this is what our
  BTextView is actually using, that's why it never used hardware
  acceleration for invert rect/region before. Have not tested this on
  real hardware yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21843 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/drawing/DrawingEngine.cpp

@@ -853,6 +853,11 @@ DrawingEngine::FillRegion(BRegion& r)
 										  fSuspendSyncLevel == 0
 										  || cursorTouched);
 				doInSoftware = false;
+			} else if (fAvailableHWAccleration & HW_ACC_INVERT_REGION
+					   && fPainter->Pattern() == B_SOLID_HIGH
+					   && fPainter->DrawingMode() == B_OP_INVERT) {
+				r.IntersectWith(fPainter->ClippingRegion());
+				fGraphicsCard->InvertRegion(r);
 			}
 		}