mkxp/src/quadarray.h

128 lines
2.5 KiB
C++

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