How to get started with QEMU internals for a custom Android emulator (GUI and I/O modification)?

18 hours ago 2
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I am working on building a custom Android emulator (similar to BlueStacks) and I’ve decided to use QEMU as the underlying virtualization engine.

However, after reviewing the official documentation, I find it more focused on usage rather than internal architecture. My goal is to deeply understand how QEMU works internally so I can modify it—specifically the interface/GUI layer and how it handles input/output for the guest OS—to make the emulator "feature-complete" for gaming.

I would like to know:

Source Code Structure: Where should I start looking in the QEMU source tree to understand the display and UI initialization (e.g., GTK, SDL, or VirtIO-GPU implementations)?

Internal Architecture: Are there any recommended resources (books, whitepapers, or specific developer wikis) that explain the interaction between the TCG (Tiny Code Generator) and the hardware abstraction layer?

Modification Workflow: For someone looking to add custom features to the emulator's shell/interface, what is the standard approach for extending QEMU's frontend?

Any guidance on which specific modules handle the graphical output and user interaction would be greatly appreciated.

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