vcl/inc/opengl/BufferObject.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  */
  10
  11 #ifndef INCLUDED_VCL_INC_OPENGL_BUFFEROBJECT_H
  12 #define INCLUDED_VCL_INC_OPENGL_BUFFEROBJECT_H
  13
  14 namespace vcl
  15 {
  16
  17 template<typename TYPE, GLenum BUFFER_TYPE>
  18 class BufferObject
  19 {
  20 private:
  21     GLuint mId;
  22
  23 public:
  24     BufferObject()
  25         : mId(0)
  26     {
  27         glGenBuffers(1, &mId);
  28         CHECK_GL_ERROR();
  29     }
  30
  31     virtual ~BufferObject()
  32     {
  33         if (mId)
  34         {
  35             glDeleteBuffers(1, &mId);
  36             CHECK_GL_ERROR();
  37             mId = 0;
  38         }
  39     }
  40
  41     void bind()
  42     {
  43         if (mId)
  44         {
  45             glBindBuffer(BUFFER_TYPE, mId);
  46             CHECK_GL_ERROR();
  47         }
  48     }
  49
  50     void unbind()
  51     {
  52         if (mId)
  53         {
  54             glBindBuffer(BUFFER_TYPE, 0);
  55             CHECK_GL_ERROR();
  56         }
  57     }
  58
  59     void upload(const std::vector<TYPE>& rData)
  60     {
  61         if (mId)
  62         {
  63             bind();
  64             glBufferData(BUFFER_TYPE, sizeof(TYPE) * rData.size(), rData.data(), GL_STATIC_DRAW);
  65             CHECK_GL_ERROR();
  66         }
  67     }
  68
  69 };
  70
  71 template<typename TYPE>
  72 class VertexBufferObject : public BufferObject<TYPE, GL_ARRAY_BUFFER>
  73 {
  74 };
  75
  76 class IndexBufferObject : public BufferObject<GLuint, GL_ELEMENT_ARRAY_BUFFER>
  77 {
  78 };
  79
  80 } // end vcl
  81
  82 #endif // INCLUDED_VCL_INC_OPENGL_BUFFEROBJECT_H
  83
  84 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */