0024131: TKOpenGL redesign GPU memory management for markers presentation

Introduce Point Sprites usage.
Graphic3d_Group - drop Marker(),MarkerSet() methods - markers should be drawn using AddPrimitiveArray.
Added new Draw Harness commands vcaps, vmarkerstest.

src/OpenGl/OpenGl_PointSprite.hxx

@@ -0,0 +1,65 @@
+// Created by: Kirill GAVRILOV
+// Copyright (c) 2013 OPEN CASCADE SAS
+//
+// The content of this file is subject to the Open CASCADE Technology Public
+// License Version 6.5 (the "License"). You may not use the content of this file
+// except in compliance with the License. Please obtain a copy of the License
+// at http://www.opencascade.org and read it completely before using this file.
+//
+// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
+// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+//
+// The Original Code and all software distributed under the License is
+// distributed on an "AS IS" basis, without warranty of any kind, and the
+// Initial Developer hereby disclaims all such warranties, including without
+// limitation, any warranties of merchantability, fitness for a particular
+// purpose or non-infringement. Please see the License for the specific terms
+// and conditions governing the rights and limitations under the License.
+
+#ifndef _OpenGl_PointSprite_H__
+#define _OpenGl_PointSprite_H__
+
+#include <OpenGl_Texture.hxx>
+#include <Handle_OpenGl_PointSprite.hxx>
+
+//! Point sprite resource. On modern hardware it will be texture with extra parameters.
+//! On ancient hardware sprites will be drawn using bitmaps.
+class OpenGl_PointSprite : public OpenGl_Texture
+{
+
+public:
+
+  //! Create uninitialized resource.
+  Standard_EXPORT OpenGl_PointSprite();
+
+  //! Destroy object.
+  Standard_EXPORT virtual ~OpenGl_PointSprite();
+
+  //! Destroy object - will release GPU memory if any.
+  Standard_EXPORT virtual void Release (const OpenGl_Context* theCtx);
+
+  //! @return true if this is display list bitmap
+  inline Standard_Boolean IsDisplayList() const
+  {
+    return myBitmapList != 0;
+  }
+
+  //! Draw sprite using glBitmap.
+  //! Please call glRasterPos3fv() before to setup sprite position.
+  Standard_EXPORT void DrawBitmap (const Handle(OpenGl_Context)& theCtx) const;
+
+  //! Initialize point sprite as display list
+  Standard_EXPORT void SetDisplayList (const Handle(OpenGl_Context)& theCtx,
+                                       const GLuint                  theBitmapList);
+
+protected:
+
+  GLuint myBitmapList; //!< if of display list to draw sprite using glBitmap (for backward compatibility)
+
+public:
+
+  DEFINE_STANDARD_RTTI(OpenGl_PointSprite) // Type definition
+
+};
+
+#endif // _OpenGl_PointSprite_H__