vcl/opengl/framebuffer.cxx

   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 #include <sal/log.hxx>
  11
  12 #include <opengl/framebuffer.hxx>
  13
  14 #include <vcl/opengl/OpenGLHelper.hxx>
  15
  16 OpenGLFramebuffer::OpenGLFramebuffer() :
  17     mnId( 0 ),
  18     mnWidth( 0 ),
  19     mnHeight( 0 ),
  20     mnAttachedTexture( 0 ),
  21     mpPrevFramebuffer( NULL ),
  22     mpNextFramebuffer( NULL )
  23 {
  24     glGenFramebuffers( 1, &mnId );
  25     VCL_GL_INFO( "vcl.opengl", "Created framebuffer " << (int)mnId );
  26 }
  27
  28 OpenGLFramebuffer::~OpenGLFramebuffer()
  29 {
  30     glDeleteFramebuffers( 1, &mnId );
  31 }
  32
  33 void OpenGLFramebuffer::Bind()
  34 {
  35     VCL_GL_INFO( "vcl.opengl", "Binding framebuffer " << (int)mnId );
  36     glBindFramebuffer( GL_FRAMEBUFFER, mnId );
  37     CHECK_GL_ERROR();
  38 }
  39
  40 void OpenGLFramebuffer::Unbind()
  41 {
  42     glBindFramebuffer( GL_FRAMEBUFFER, 0 );
  43     VCL_GL_INFO( "vcl.opengl", "Binding default framebuffer" );
  44     CHECK_GL_ERROR();
  45 }
  46
  47 bool OpenGLFramebuffer::IsFree() const
  48 {
  49     return !mnAttachedTexture;
  50 }
  51
  52 bool OpenGLFramebuffer::IsAttached( GLuint nTexture ) const
  53 {
  54     return mnAttachedTexture == nTexture;
  55 }
  56
  57 bool OpenGLFramebuffer::IsAttached( const OpenGLTexture& rTexture ) const
  58 {
  59     return mnAttachedTexture == rTexture.Id();
  60 }
  61
  62 void OpenGLFramebuffer::AttachTexture( const OpenGLTexture& rTexture )
  63 {
  64     if( rTexture.Id() == mnAttachedTexture )
  65         return;
  66
  67     VCL_GL_INFO( "vcl.opengl", "Attaching texture " << rTexture.Id() << " to framebuffer " << (int)mnId );
  68     mnAttachedTexture = rTexture.Id();
  69     mnWidth = rTexture.GetWidth();
  70     mnHeight = rTexture.GetHeight();
  71     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mnAttachedTexture, 0);
  72     if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
  73     {
  74         SAL_WARN("vcl.opengl", "Framebuffer incomplete");
  75     }
  76     CHECK_GL_ERROR();
  77 }
  78
  79 void OpenGLFramebuffer::DetachTexture()
  80 {
  81     if( mnAttachedTexture != 0 )
  82     {
  83         CHECK_GL_ERROR();
  84         mnAttachedTexture = 0;
  85         glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0 );
  86         CHECK_GL_ERROR();
  87     }
  88 }
  89
  90 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */