Buffers

// create buffer
GLuint _buffer { 0 };
glCreateBuffers(1, std::addressof(_buffer));
// store buffer data
glNamedBufferStorage(_buffer, sizeof(data), data, 0 /*flags*/);
    

VAO

// create and bind vao
GLuint _vao { 0 };
glCreateVertexArray(1, std::addressof(_vao));
glBindVertexArray(_vao);

// set up attribute
glEnableVertexArrayAttrib(_vao, 0);
glVertexArrayAttribFormat(_vao, 0, 3 /* size */, GL_FLOAT, false, 0 /* stride */);
glVertexArrayAttribBinding(_vao, 0, 0);

// set buffer for vao
glVertexArrayVertexBuffer(_vao, 0, _buffer, 0 /* offset */, sizeof(float) * 3 /* stride */);
// set index buffer for vao
glVertexArrayElementBuffer(_vao, buffer);

// draw vao
glBindVertexArray(_vao);
// unindexed
glDrawArrays(GL_TRIANGLES, 0, sizeof(vertices) / sizeof(float));
// indexed
glDrawElements(GL_TRIANGLES, count, indices_format, ind_offset);
    

Textures

// create texture
GLuint _texture { 0 };
glCreateTextures(GL_TEXTURE_2D /* target */, 1, std::addressof(_texture));

// set parameters
glTextureParameteri(_texture, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

// upload data to texture
glTextureStorage2D(_texture, 1, GL_RGBA9, width, height);
glTextureSubImage2D(_texture, 0, 0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);

// bind texture
glBindTextureUnit(1, _texture);
    

Framebuffers

// create framebuffer
GLuint _fb { 0 };
glCreateFramebuffers(1, std::addressof(_fb));

glNamedFramebufferTexture(_fb, GL_COLOR_ATTACHMENT0, tex, 0);
glNamedFramebufferTexture(_fb, GL_DEPTH_ATTACHMENT, depth_tex, 0);

if (glCheckNamedFramebufferStatus(_fb, GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
  // handle error
}

// blit framebuffers
glBlitNamedFramebuffer(_fb_src, _fb_dest, src_x, src_y, src_w, src_h, dest_x, dest_y, dest_w, dest_h, GL_COLOR_BUFFER_BIT, GL_LINEAR);

// clear buffer (0 is name for default framebuffer)
glClearNamedFramebufferfv(_fb, GL_COLOR, col_buf_idx, std::addressof(rgba));
glClearNamedFramebufferfv(_fb, GL_DEPTH, 0, std::addressof(depth));
    

Debug Output

// set debug callback
glEnable(GL_DEBUG_OUTPUT);
// message_callback = void (GLenum src, GLenum type, GLuint id, GLenum severity, GLsizei len, GLchar const* msg, void const* userparam)
glDebugMessageCallback(message_callback, nullptr /* user param */);

// filter debug messages
glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DEBUG_SEVERITY_NOTIFICATION, 0, nullptr, GL_FALSE);