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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <sal/log.hxx>
#include <opengl/framebuffer.hxx>
#include <vcl/opengl/OpenGLHelper.hxx>
OpenGLFramebuffer::OpenGLFramebuffer() :
mnId( 0 ),
mnWidth( 0 ),
mnHeight( 0 ),
mnAttachedTexture( 0 ),
mpPrevFramebuffer( nullptr ),
mpNextFramebuffer( nullptr )
{
glGenFramebuffers( 1, &mnId );
CHECK_GL_ERROR();
VCL_GL_INFO( "Created framebuffer " << (int)mnId );
}
OpenGLFramebuffer::~OpenGLFramebuffer()
{
glDeleteFramebuffers( 1, &mnId );
CHECK_GL_ERROR();
}
void OpenGLFramebuffer::Bind()
{
VCL_GL_INFO( "Binding framebuffer " << (int)mnId );
glBindFramebuffer( GL_FRAMEBUFFER, mnId );
CHECK_GL_ERROR();
}
void OpenGLFramebuffer::Unbind()
{
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
CHECK_GL_ERROR();
VCL_GL_INFO( "Binding default framebuffer" );
}
bool OpenGLFramebuffer::IsFree() const
{
return !mnAttachedTexture;
}
bool OpenGLFramebuffer::IsAttached( GLuint nTexture ) const
{
return mnAttachedTexture == nTexture;
}
bool OpenGLFramebuffer::IsAttached( const OpenGLTexture& rTexture ) const
{
return mnAttachedTexture == rTexture.Id();
}
void OpenGLFramebuffer::AttachTexture( const OpenGLTexture& rTexture )
{
if( rTexture.Id() == mnAttachedTexture )
return;
VCL_GL_INFO( "Attaching texture " << rTexture.Id() << " to framebuffer " << (int)mnId );
mnAttachedTexture = rTexture.Id();
mnWidth = rTexture.GetWidth();
mnHeight = rTexture.GetHeight();
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mnAttachedTexture, 0);
CHECK_GL_ERROR();
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
CHECK_GL_ERROR();
if (status != GL_FRAMEBUFFER_COMPLETE)
{
SAL_WARN("vcl.opengl", "Framebuffer incomplete");
}
}
void OpenGLFramebuffer::DetachTexture()
{
if( mnAttachedTexture != 0 )
{
mnAttachedTexture = 0;
glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0 );
CHECK_GL_ERROR();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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