gl_utils

A small library to provide the RAII principle to OpenGL.

It does not intend to provide any window creation or user input helpers.

Pseudocode Example

Textures

// #include "gl_utils/Texture.h"

gl::Texture2D texture;
const auto a = scope_bind(texture);
glTexImage2D(texture.target, 0, GL_RGBA8, windowWidth, windowHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);

Static vertex buffer

// #include "gl_utils/BufferObjects.h"

gl::StaticVbo vbo;
const auto b = scope_bind(vbo);
// do gl stuff

Vertex array object

// #include "gl_utils/VertexArrayObject.h"

gl::VertexArrayObject vao;
const auto c = scope_bind(vao);
// do gl stuff

Mesh

// #include "gl_utils/Mesh.h"
// #include <tuple>

typedef std::tuple<float, float, float> Position;
typedef std::tuple<float, float> UV;
typedef std::tuple<Position, UV> Vertex;

// describing the layout of the buffer.
const gl::VertexAttributeDescriptors vertexDescriptors { gl::describe<Position>(3, GL_FLOAT), gl::describe<UV>(2, GL_FLOAT) };

// the buffer itself
const float z = 1;
const std::vector<Vertex> vertices = { Vertex { Position { -1, -1, z }, UV { 0, 0 } }, //
                Vertex { Position { -1, 1, z }, UV { 0, 1 } }, //
                Vertex { Position { 1, 1, z }, UV { 1, 1 } }, //
                Vertex { Position { 1, -1, z }, UV { 1, 0 } } };

gl::Mesh mesh(GL_TRIANGLE_FAN, vertexDescriptors, vertices.data(), vertices.size());
auto bound = scope_bind(mesh);
mesh.draw();

License

see LICENSE file