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 template <typename TYPE, GLenum BUFFER_TYPE> class BufferObject
  17 {
  18 private:
  19     GLuint mId;
  20
  21 public:
  22     BufferObject()
  23         : mId(0)
  24     {
  25         glGenBuffers(1, &mId);
  26         CHECK_GL_ERROR();
  27     }
  28
  29     virtual ~BufferObject()
  30     {
  31         if (mId)
  32         {
  33             glDeleteBuffers(1, &mId);
  34             CHECK_GL_ERROR();
  35             mId = 0;
  36         }
  37     }
  38
  39     void bind()
  40     {
  41         if (mId)
  42         {
  43             glBindBuffer(BUFFER_TYPE, mId);
  44             CHECK_GL_ERROR();
  45         }
  46     }
  47
  48     void unbind()
  49     {
  50         if (mId)
  51         {
  52             glBindBuffer(BUFFER_TYPE, 0);
  53             CHECK_GL_ERROR();
  54         }
  55     }
  56
  57     void upload(const std::vector<TYPE>& rData)
  58     {
  59         if (mId)
  60         {
  61             bind();
  62             glBufferData(BUFFER_TYPE, sizeof(TYPE) * rData.size(), rData.data(), GL_STATIC_DRAW);
  63             CHECK_GL_ERROR();
  64         }
  65     }
  66 };
  67
  68 template <typename TYPE> class VertexBufferObject final : public BufferObject<TYPE, GL_ARRAY_BUFFER>
  69 {
  70 };
  71
  72 class IndexBufferObject final : public BufferObject<GLuint, GL_ELEMENT_ARRAY_BUFFER>
  73 {
  74 };
  75
  76 } // end vcl
  77
  78 #endif // INCLUDED_VCL_INC_OPENGL_BUFFEROBJECT_H
  79
  80 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */