💿🐜 Antkeeper source code
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.6 KiB
99 lines
2.6 KiB
/*
|
|
* Copyright (C) 2021 Christopher J. Howard
|
|
*
|
|
* This file is part of Antkeeper source code.
|
|
*
|
|
* Antkeeper source code 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Antkeeper source code 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 Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "gl/vertex-array.hpp"
|
|
#include "gl/vertex-buffer.hpp"
|
|
#include <glad/glad.h>
|
|
#include <stdexcept>
|
|
#include <string>
|
|
|
|
namespace gl {
|
|
|
|
static constexpr GLenum vertex_attribute_type_lut[] =
|
|
{
|
|
GL_BYTE,
|
|
GL_UNSIGNED_BYTE,
|
|
GL_SHORT,
|
|
GL_UNSIGNED_SHORT,
|
|
GL_INT,
|
|
GL_UNSIGNED_INT,
|
|
GL_HALF_FLOAT,
|
|
GL_FLOAT,
|
|
GL_DOUBLE
|
|
};
|
|
|
|
vertex_array::vertex_array():
|
|
gl_array_id(0)
|
|
{
|
|
glGenVertexArrays(1, &gl_array_id);
|
|
}
|
|
|
|
vertex_array::~vertex_array()
|
|
{
|
|
glDeleteVertexArrays(1, &gl_array_id);
|
|
}
|
|
|
|
void vertex_array::bind(attribute_location_type location, const vertex_attribute& attribute)
|
|
{
|
|
if (attribute.buffer == nullptr)
|
|
{
|
|
throw std::invalid_argument("Cannot bind vertex attribute that has a null vertex buffer.");
|
|
}
|
|
|
|
if (attribute.components < 1 || attribute.components > 4)
|
|
{
|
|
throw std::invalid_argument("Cannot bind vertex attribute that has an unsupported number of components (" + std::to_string(attribute.components) + ")");
|
|
}
|
|
|
|
attributes[location] = attribute;
|
|
|
|
GLenum gl_type = vertex_attribute_type_lut[static_cast<std::size_t>(attribute.type)];
|
|
glBindVertexArray(gl_array_id);
|
|
glBindBuffer(GL_ARRAY_BUFFER, attribute.buffer->gl_buffer_id);
|
|
glVertexAttribPointer(
|
|
static_cast<GLuint>(location),
|
|
static_cast<GLint>(attribute.components),
|
|
gl_type,
|
|
GL_FALSE,
|
|
static_cast<GLsizei>(attribute.stride),
|
|
(const GLvoid*)attribute.offset);
|
|
glEnableVertexAttribArray(static_cast<GLuint>(location));
|
|
}
|
|
|
|
void vertex_array::unbind(attribute_location_type location)
|
|
{
|
|
if (auto it = attributes.find(location); it != attributes.end())
|
|
{
|
|
glBindVertexArray(gl_array_id);
|
|
glDisableVertexAttribArray(static_cast<GLuint>(location));
|
|
|
|
attributes.erase(it);
|
|
}
|
|
else
|
|
{
|
|
throw std::invalid_argument("Non-existent vertex attribute cannot be unbound.");
|
|
}
|
|
}
|
|
|
|
const typename vertex_array::attribute_map_type& vertex_array::get_attributes() const
|
|
{
|
|
return attributes;
|
|
}
|
|
|
|
} // namespace gl
|