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[occt.git] / src / OpenGl / OpenGl_TextBuilder.hxx
1 // Created on: 2015-06-18
2 // Created by: Ilya SEVRIKOV
3 // Copyright (c) 2015 OPEN CASCADE SAS
4 //
5 // This file is part of Open CASCADE Technology software library.
6 //
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
12 //
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
15
16 #ifndef OpenGl_TextBuilder_Header
17 #define OpenGl_TextBuilder_Header
18
19 #include <OpenGl_Context.hxx>
20 #include <OpenGl_Font.hxx>
21 #include <OpenGl_VertexBuffer.hxx>
22 #include <OpenGl_VertexBufferEditor.hxx>
23 #include <OpenGl_Vec.hxx>
24
25 #include <NCollection_Vector.hxx>
26 #include <NCollection_Handle.hxx>
27
28 class Font_TextFormatter;
29
30 //! This class generates primitive array required for rendering textured text using OpenGl_Font instance.
31 class OpenGl_TextBuilder
32 {
33 public:
34
35   //! Creates empty object.
36   Standard_EXPORT OpenGl_TextBuilder();
37
38   //! Creates texture quads for the given text.
39   Standard_EXPORT void Perform (const Handle(Font_TextFormatter)&                theFormatter,
40                                 const Handle(OpenGl_Context)&                    theContext,
41                                 OpenGl_Font&                                     theFont,
42                                 NCollection_Vector<GLuint>&                      theTextures,
43                                 NCollection_Vector<Handle(OpenGl_VertexBuffer)>& theVertsPerTexture,
44                                 NCollection_Vector<Handle(OpenGl_VertexBuffer)>& theTCrdsPerTexture);
45
46 protected: //! @name class auxillary methods
47
48   Standard_EXPORT void createGlyphs (const Handle(Font_TextFormatter)&                                              theFormatter,
49                                      const Handle(OpenGl_Context)&                                                  theCtx,
50                                      OpenGl_Font&                                                                   theFont,
51                                      NCollection_Vector<GLuint>&                                                    theTextures,
52                                      NCollection_Vector< NCollection_Handle < NCollection_Vector <OpenGl_Vec2> > >& theVertsPerTexture,
53                                      NCollection_Vector< NCollection_Handle < NCollection_Vector <OpenGl_Vec2> > >& theTCrdsPerTexture);
54
55 protected: //! @name class auxillary fields
56
57   NCollection_Vector<OpenGl_Font::Tile>  myTileRects;
58   OpenGl_VertexBufferEditor<OpenGl_Vec2> myVboEditor;
59 };
60
61 #endif // OpenGl_TextBuilder_Header