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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2008-2018 NVIDIA Corporation. All rights reserved.
#include "GLES2RendererIndexBuffer.h"
#if defined(RENDERER_ENABLE_GLES2)
#include <RendererIndexBufferDesc.h>
namespace SampleRenderer
{
GLES2RendererIndexBuffer::GLES2RendererIndexBuffer(const RendererIndexBufferDesc &desc) :
RendererIndexBuffer(desc)
{
m_indexSize = getFormatByteSize(getFormat());
RENDERER_ASSERT(GLEW_ARB_vertex_buffer_object, "Vertex Buffer Objects not supported on this machine!");
if(GLEW_ARB_vertex_buffer_object)
{
RENDERER_ASSERT(desc.maxIndices > 0 && desc.maxIndices > 0, "Cannot create zero size Index Buffer.");
if(desc.maxIndices > 0 && desc.maxIndices > 0)
{
GLenum usage = GL_STATIC_DRAW_ARB;
if(getHint() == HINT_DYNAMIC)
{
usage = GL_DYNAMIC_DRAW_ARB;
}
glGenBuffersARB(1, &m_ibo);
RENDERER_ASSERT(m_ibo, "Failed to create Index Buffer.");
if(m_ibo)
{
m_maxIndices = desc.maxIndices;
const PxU32 bufferSize = m_indexSize * m_maxIndices;
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, m_ibo);
glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferSize, 0, usage);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
}
}
}
GLES2RendererIndexBuffer::~GLES2RendererIndexBuffer(void)
{
if(m_ibo)
{
glDeleteBuffersARB(1, &m_ibo);
}
}
void *GLES2RendererIndexBuffer::lock(void)
{
void *buffer = 0;
if(m_ibo)
{
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, m_ibo);
buffer = glMapBufferOES(GL_ELEMENT_ARRAY_BUFFER_ARB, GL_WRITE_ONLY);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
return buffer;
}
void GLES2RendererIndexBuffer::unlock(void)
{
if(m_ibo)
{
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, m_ibo);
glUnmapBufferOES(GL_ELEMENT_ARRAY_BUFFER_ARB);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
}
void GLES2RendererIndexBuffer::bind(void) const
{
if(m_ibo)
{
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, m_ibo);
}
}
void GLES2RendererIndexBuffer::unbind(void) const
{
if(m_ibo)
{
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
}
}
}
#endif // #if defined(RENDERER_ENABLE_GLES2)
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