ImGuiCreateContext

ImGuiCreateContext is a fundamental function within the Dear ImGui library. Its primary purpose is to initialize a new Dear ImGui context. This context acts as a central repository for all the global state and data associated with an ImGui instance. When you create a context, you are essentially setting up the necessary internal structures that ImGui needs to manage its user interface elements, drawing commands, and internal state like mouse input, keyboard input, and font handling.

Calling ImGuiCreateContext is typically the very first step in using Dear ImGui within an application. It allocates the memory for the context and initializes its various members to default values. After creating the context, other ImGui functions can be called to begin building the UI. It's important to note that an application can have multiple ImGui contexts, allowing for independent UI instances, though typically only one is used in most applications.

Following the use of ImGui, it is equally important to properly clean up the resources allocated by the context. This is achieved by calling the ImGuiDestroyContext function. Failing to destroy the context can lead to memory leaks. The creation and destruction of the context form the lifecycle management for a Dear ImGui instance.