The repository contains a script which can convert Dear ImGUI library to use an explicit context as argument of every API instead of a global context as it is today.

// Implict API
bool state;
ImGui::Begin("My Window"e);
ImGui::Button("My Button", &state);
ImGui::End();
// Explicit API
ImGuiContext* ctx = ImGui::CreateContext();
bool state;
ImGui::Begin(ctx, "My Window"e);
ImGui::Button(ctx, "My Button", &state);
ImGui::End(ctx);

https://github.com/Dragnalith/imgui contains two branches master-explicit and docking-explicit which are respectively the convert to explicit API of master and docking from https://github.com/ocornut/imgui

Most of the conversion is made automatically using the make_explicit_imgui.py script in this repository. But still some commit has been written by hands.

Those two branches are made of 3 kind of commit:

• Some pre-generation commits. Those commits are written by hand and are expected to be merge into the master branch of Dear ImGui.
• One commit generated using make_explicit_imgui.py convert commands. This commit message of the generated commit starts with a "[generated]" tag.
• Some post-generation commits. Those commits are written by hand to fix and finish the conversion.

Rebasing master-explicit and docking-explicit simply using git rebase leads to too many conflicts. Instead the strategy is to rebase only pre-generation and post-generation commits, but to regenerate the generated commit each time.

pre-generation and post-generation commits are very small compared to the generated one. They are expected to be cheap to maintain, i.e conflicting with upstream branches very rarely.

• As a prerequisite, you need to install libclang. Do so with pip:

pip install libclang

• To rebase master-explicit branch on top of the most recent master run this command:

python make_explicit_imgui.py rebase <path-to-imgui> --branch master-explicit --base origin/master

• To rebase docking-explicit branch on top of the most recent docking run this command:

python make_explicit_imgui.py rebase <path-to-imgui> --branch docking-explicit --base origin/docking