0023457: Slow text rendering

Added class Font_FTFont wrapper over FreeType face

Unify collections methods NCollection_Array1, NCollection_Sequence, NCollection_Vector:
declare Upper, Lower, First, Last, ChangeFirst, ChangeLast methods for all these collections.

Added method NCollection_DataMap::Find() with check key is bound + retrieve value within single call interface.

OpenGl_Context::ReleaseResource() method now supports lazy release of shared resources.

Added class OpenGl_Font which implements textured fonts support.
Added class OpenGl_TextFormatter for text formatting using OpenGl_Font.

OpenGl_Text was redesigned to use OpenGl_FontFormatter.

OpenGl_FontMgr class was removed.
All methods related to text rendered removed from OpenGl_Display class.

OpenGl_Trihedron and OpenGl_GraduatedTrihedron classes were redesigned
to use OpenGl_Text.

OpenGl_PrinterContext instance was moved to OpenGl_GraphicDriver fields
(eliminated usage of global instance).

Added test cases into 3rdparty/fonts grid to check different font styles
and perform FPS tests (no automated results - requires manual analysis
or snapshots comparisons).

Removed unused CSF_FTGL dependency.
OpenGl_Text::setupMatrix - do not apply floor for myWinZ

src/Font/Font_FTLibrary.hxx

@@ -0,0 +1,73 @@
+// Created on: 2013-01-28
+// 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 _Font_FTLibrary_H__
+#define _Font_FTLibrary_H__
+
+#include <Standard_DefineHandle.hxx>
+#include <Standard_Transient.hxx>
+#include <Handle_Standard_Transient.hxx>
+
+// inclusion template for FreeType
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+//! Wrapper over FT_Library. Provides access to FreeType library.
+class Font_FTLibrary : public Standard_Transient
+{
+
+public:
+
+  //! Initialize new FT_Library instance.
+  Standard_EXPORT Font_FTLibrary();
+
+  //! Release FT_Library instance.
+  Standard_EXPORT ~Font_FTLibrary();
+
+  //! This method should always return true.
+  //! @return true if FT_Library instance is valid.
+  bool IsValid() const
+  {
+    return myFTLib != NULL;
+  }
+
+  //! Access FT_Library instance.
+  FT_Library Instance() const
+  {
+    return myFTLib;
+  }
+
+private:
+
+  FT_Library myFTLib;
+
+private:
+
+  Font_FTLibrary            (const Font_FTLibrary& );
+  Font_FTLibrary& operator= (const Font_FTLibrary& );
+
+public:
+
+  DEFINE_STANDARD_RTTI(Font_FTLibrary) // Type definition
+
+};
+
+DEFINE_STANDARD_HANDLE(Font_FTLibrary, Standard_Transient)
+
+#endif // _Font_FTLibrary_H__