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