vcl/inc/opengl/texture.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  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_VCL_INC_OPENGL_TEXTURE_H
  21 #define INCLUDED_VCL_INC_OPENGL_TEXTURE_H
  22
  23 #include <GL/glew.h>
  24 #include <vcl/dllapi.h>
  25 #include <vcl/salgtype.hxx>
  26
  27 #include <tools/gen.hxx>
  28
  29 #include <memory>
  30 #include <vector>
  31
  32 class ImplOpenGLTexture
  33 {
  34 public:
  35     int    mnRefCount;
  36     GLuint mnTexture;
  37     int    mnWidth;
  38     int    mnHeight;
  39     GLenum mnFilter;
  40
  41     std::unique_ptr<std::vector<int>> mpSlotReferences;
  42     int mnFreeSlots;
  43
  44     ImplOpenGLTexture( int nWidth, int nHeight, bool bAllocate );
  45     ImplOpenGLTexture( int nWidth, int nHeight, int nFormat, int nType, void const * pData );
  46     ImplOpenGLTexture( int nX, int nY, int nWidth, int nHeight );
  47     ~ImplOpenGLTexture();
  48
  49     bool InsertBuffer(int nX, int nY, int nWidth, int nHeight, int nFormat, int nType, sal_uInt8* pData);
  50
  51     void IncreaseRefCount(int nSlotNumber)
  52     {
  53         mnRefCount++;
  54         if (mpSlotReferences && nSlotNumber >= 0)
  55         {
  56             if (mpSlotReferences->at(nSlotNumber) == 0)
  57                 mnFreeSlots--;
  58             mpSlotReferences->at(nSlotNumber)++;
  59         }
  60     }
  61
  62     void DecreaseRefCount(int nSlotNumber)
  63     {
  64         mnRefCount--;
  65         if (mpSlotReferences && nSlotNumber >= 0)
  66         {
  67             mpSlotReferences->at(nSlotNumber)--;
  68             if (mpSlotReferences->at(nSlotNumber) == 0)
  69                 mnFreeSlots++;
  70         }
  71     }
  72
  73     bool ExistRefs()
  74     {
  75         return mnRefCount > 0;
  76     }
  77
  78     bool InitializeSlots(int nSlotSize);
  79     int FindFreeSlot();
  80 };
  81
  82 class VCL_DLLPUBLIC OpenGLTexture
  83 {
  84 private:
  85     // if the rect size doesn't match the mpImpl one, this instance
  86     // is a sub-area from the real OpenGL texture
  87     Rectangle maRect;
  88     ImplOpenGLTexture* mpImpl;
  89     int mnSlotNumber;
  90
  91 public:
  92                     OpenGLTexture();
  93                     OpenGLTexture(ImplOpenGLTexture* pImpl, Rectangle aRectangle, int nSlotNumber = 0);
  94
  95                     OpenGLTexture( int nWidth, int nHeight, bool bAllocate = true );
  96                     OpenGLTexture( int nWidth, int nHeight, int nFormat, int nType, void const * pData );
  97                     OpenGLTexture( int nX, int nY, int nWidth, int nHeight );
  98                     OpenGLTexture( const OpenGLTexture& rTexture );
  99                     OpenGLTexture( const OpenGLTexture& rTexture, int nX, int nY, int nWidth, int nHeight );
 100     virtual         ~OpenGLTexture();
 101
 102     bool            IsUnique() const;
 103
 104     GLuint          Id() const;
 105     int             GetWidth() const;
 106     int             GetHeight() const;
 107     void            GetCoord( GLfloat* pCoord, const SalTwoRect& rPosAry, bool bInverted=false ) const;
 108     void            GetWholeCoord( GLfloat* pCoord ) const;
 109
 110     void            Bind();
 111     void            Unbind();
 112     bool            Draw();
 113     void            Read( GLenum nFormat, GLenum nType, sal_uInt8* pData );
 114
 115     GLenum          GetFilter() const;
 116     void            SetFilter( GLenum nFilter );
 117
 118                     operator bool() const;
 119     OpenGLTexture&  operator=( const OpenGLTexture& rTexture );
 120     bool            operator==( const OpenGLTexture& rTexture ) const;
 121     bool            operator!=( const OpenGLTexture& rTexture ) const;
 122 };
 123
 124 #endif // INCLUDED_VCL_INC_OPENGL_TEXTURE_H
 125
 126 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */