Amaryllis Kulla
ab24f0fc74
Keep information on first file creation year, and update my email address yet again.
127 lines
2.5 KiB
C++
127 lines
2.5 KiB
C++
/*
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** quadarray.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 - 2021 Amaryllis Kulla <ancurio@mapleshrine.eu>
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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 QUADARRAY_H
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#define QUADARRAY_H
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#include "vertex.h"
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#include "gl-util.h"
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#include "gl-meta.h"
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#include "sharedstate.h"
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#include "global-ibo.h"
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#include "shader.h"
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#include <vector>
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#include <stdint.h>
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template<class VertexType>
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struct QuadArray
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{
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std::vector<VertexType> vertices;
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VBO::ID vbo;
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GLMeta::VAO vao;
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size_t quadCount;
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GLsizeiptr vboSize;
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QuadArray()
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: quadCount(0),
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vboSize(-1)
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{
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vbo = VBO::gen();
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GLMeta::vaoFillInVertexData<VertexType>(vao);
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vao.vbo = vbo;
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vao.ibo = shState->globalIBO().ibo;
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GLMeta::vaoInit(vao);
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}
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~QuadArray()
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{
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GLMeta::vaoFini(vao);
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VBO::del(vbo);
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}
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void resize(size_t size)
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{
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vertices.resize(size * 4);
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quadCount = size;
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}
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void clear()
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{
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vertices.clear();
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quadCount = 0;
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}
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/* This needs to be called after the final 'append()' call
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* and previous to the first 'draw()' call. */
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void commit()
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{
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VBO::bind(vbo);
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GLsizeiptr size = vertices.size() * sizeof(VertexType);
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if (size > vboSize)
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{
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/* New data exceeds already allocated size.
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* Reallocate VBO. */
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VBO::uploadData(size, dataPtr(vertices), GL_DYNAMIC_DRAW);
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vboSize = size;
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shState->ensureQuadIBO(quadCount);
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}
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else
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{
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/* New data fits in allocated size */
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VBO::uploadSubData(0, size, dataPtr(vertices));
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}
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VBO::unbind();
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}
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void draw(size_t offset, size_t count)
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{
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GLMeta::vaoBind(vao);
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const char *_offset = (const char*) 0 + offset * 6 * sizeof(index_t);
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gl.DrawElements(GL_TRIANGLES, count * 6, _GL_INDEX_TYPE, _offset);
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GLMeta::vaoUnbind(vao);
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}
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void draw()
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{
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draw(0, quadCount);
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}
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size_t count() const
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{
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return quadCount;
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}
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};
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typedef QuadArray<Vertex> ColorQuadArray;
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typedef QuadArray<SVertex> SimpleQuadArray;
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#endif // QUADARRAY_H
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