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132 lines
3.8 KiB
C++
132 lines
3.8 KiB
C++
/*
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* Copyright 1993-2015 NVIDIA Corporation. All rights reserved.
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*
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* Please refer to the NVIDIA end user license agreement (EULA) associated
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* with this source code for terms and conditions that govern your use of
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* this software. Any use, reproduction, disclosure, or distribution of
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* this software and related documentation outside the terms of the EULA
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* is strictly prohibited.
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*
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*/
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/*
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Copyright (c) 2005,
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Aaron Lefohn (lefohn@cs.ucdavis.edu)
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Adam Moerschell (atmoerschell@ucdavis.edu)
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All rights reserved.
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This software is licensed under the BSD open-source license. See
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http://www.opensource.org/licenses/bsd-license.php for more detail.
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*************************************************************
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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conditions are met:
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Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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Neither the name of the University of California, Davis nor the names of
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the contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#define HELPERGL_EXTERN_GL_FUNC_IMPLEMENTATION
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#include <helper_gl.h>
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#include "renderbuffer.h"
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#include <iostream>
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using namespace std;
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Renderbuffer::Renderbuffer()
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: m_bufId(_CreateBufferId())
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{}
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Renderbuffer::Renderbuffer(GLenum internalFormat, int width, int height)
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: m_bufId(_CreateBufferId())
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{
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Set(internalFormat, width, height);
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}
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Renderbuffer::~Renderbuffer()
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{
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glDeleteRenderbuffersEXT(1, &m_bufId);
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}
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void Renderbuffer::Bind()
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{
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, m_bufId);
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}
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void Renderbuffer::Unbind()
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{
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
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}
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void Renderbuffer::Set(GLenum internalFormat, int width, int height)
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{
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int maxSize = Renderbuffer::GetMaxSize();
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if (width > maxSize || height > maxSize)
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{
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cerr << "Renderbuffer::Renderbuffer() ERROR:\n\t"
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<< "Size too big (" << width << ", " << height << ")\n";
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return;
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}
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// Guarded bind
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GLint savedId = 0;
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glGetIntegerv(GL_RENDERBUFFER_BINDING_EXT, &savedId);
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if (savedId != (GLint)m_bufId)
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{
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Bind();
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}
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// Allocate memory for renderBuffer
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glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, internalFormat, width, height);
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// Guarded unbind
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if (savedId != (GLint)m_bufId)
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{
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, savedId);
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}
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}
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GLuint Renderbuffer::GetId() const
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{
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return m_bufId;
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}
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GLint Renderbuffer::GetMaxSize()
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{
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GLint maxAttach = 0;
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glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE_EXT, &maxAttach);
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return maxAttach;
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}
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GLuint Renderbuffer::_CreateBufferId()
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{
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GLuint id = 0;
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glGenRenderbuffersEXT(1, &id);
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return id;
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}
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