mkxp/src/global-ibo.h

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/*
** global-ibo.h
**
** This file is part of mkxp.
**
** Copyright (C) 2013 Jonas Kulla <Nyocurio@gmail.com>
**
** mkxp is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 2 of the License, or
** (at your option) any later version.
**
** mkxp is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GLOBALIBO_H
#define GLOBALIBO_H
#include "gl-util.h"
#include <vector>
#include <limits>
#include <assert.h>
#include <stdint.h>
typedef uint16_t index_t;
#define INDEX_T_MAX std::numeric_limits<index_t>::max()
#define _GL_INDEX_TYPE GL_UNSIGNED_SHORT
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struct GlobalIBO
{
IBO::ID ibo;
std::vector<index_t> buffer;
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GlobalIBO()
{
ibo = IBO::gen();
}
~GlobalIBO()
{
IBO::del(ibo);
}
void ensureSize(size_t quadCount)
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{
assert(quadCount*6 < INDEX_T_MAX);
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if (buffer.size() >= quadCount*6)
return;
size_t startInd = buffer.size() / 6;
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buffer.reserve(quadCount*6);
for (size_t i = startInd; i < quadCount; ++i)
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{
static const index_t indTemp[] = { 0, 1, 2, 2, 3, 0 };
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for (size_t j = 0; j < 6; ++j)
buffer.push_back(i * 4 + indTemp[j]);
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}
IBO::bind(ibo);
IBO::uploadData(buffer.size() * sizeof(index_t), dataPtr(buffer));
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IBO::unbind();
}
};
#endif // GLOBALIBO_H