Framebuffer swap should only be called when a new frame has been
rendered.
ANR when stopping the emulator in single-threaded mode: race condition
causes stopRequested to not be handled, and Pause event is never sent.
Race condition when starting then stopping the render thread:
mainui_enabled isn't set until after the thread has started. If stopped
during that time, it will hang.
Auto save state in a background thread to avoid ANR.
Retrieve last frame rgb data (gl, vk, dx9, dx11).
Specific save screenshot code for android, iOS and UWP.
Add Save Screenshot emu key (F12 by default)
vk: defer deletion of in-flight textures when texture cache is cleared.
vk: fix issue when updating imgui textures after a render pass has begun
(achievements)
vk: palette texture not updated after a state has been loaded.
gl: Move opengl-specific stuff into opengl imgui driver.
savestate: Add non compressed header, following by screenshot png data,
before actual savestate.
Issue #842
Flyinghead