0031458: Visualization - refine classes across Prs3d and StdPrs packages
[occt.git] / src / SelectMgr / SelectMgr_SelectionImageFiller.hxx
diff --git a/src/SelectMgr/SelectMgr_SelectionImageFiller.hxx b/src/SelectMgr/SelectMgr_SelectionImageFiller.hxx
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+// Copyright (c) 2020 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#ifndef _SelectMgr_SelectionImageFiller_HeaderFile
+#define _SelectMgr_SelectionImageFiller_HeaderFile
+
+#include <Image_PixMap.hxx>
+#include <math_BullardGenerator.hxx>
+#include <NCollection_Map.hxx>
+#include <StdSelect_TypeOfSelectionImage.hxx>
+#include <Quantity_ColorHasher.hxx>
+
+class SelectMgr_ViewerSelector;
+
+//! Abstract class for filling pixel with color.
+//! This is internal tool for SelectMgr_ViewerSelector3d::ToPixMap().
+class SelectMgr_SelectionImageFiller : public Standard_Transient
+{
+public:
+  //! Create filler of specified type.
+  static Handle(SelectMgr_SelectionImageFiller) CreateFiller (Image_PixMap& thePixMap,
+                                                              SelectMgr_ViewerSelector* theSelector,
+                                                              StdSelect_TypeOfSelectionImage theType);
+
+public:
+
+  //! Main constructor.
+  SelectMgr_SelectionImageFiller (Image_PixMap& thePixMap,
+                                  SelectMgr_ViewerSelector* theSelector)
+  : myImage  (&thePixMap),
+    myMainSel(theSelector) {}
+
+  //! Fill pixel at specified position.
+  virtual void Fill (const Standard_Integer theCol,
+                     const Standard_Integer theRow,
+                     const Standard_Integer thePicked) = 0;
+
+  //! Flush results into final image.
+  virtual void Flush() {}
+
+protected:
+
+  //! Find the new unique random color.
+  void randomPastelColor (Quantity_Color& theColor)
+  {
+    for (;;)
+    {
+      nextRandomPastelColor (theColor);
+      if (myUniqueColors.Add (theColor))
+      {
+        return;
+      }
+    }
+  }
+
+  //! Fills the given color as random.
+  void nextRandomPastelColor (Quantity_Color& theColor)
+  {
+    theColor = Quantity_Color (Standard_Real(myBullardGenerator.NextInt() % 256) / 255.0,
+                               Standard_Real(myBullardGenerator.NextInt() % 256) / 255.0,
+                               Standard_Real(myBullardGenerator.NextInt() % 256) / 255.0,
+                               Quantity_TOC_sRGB);
+  }
+
+protected:
+  Image_PixMap*             myImage;
+  SelectMgr_ViewerSelector* myMainSel;
+  math_BullardGenerator     myBullardGenerator;
+  NCollection_Map<Quantity_Color, Quantity_ColorHasher> myUniqueColors;
+};
+
+#endif