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
* Enabled GDB server, compile fix for MSVC, added GDB option to config
* GDB - 'vMustReplyEmpty' should not be explicitly handled, it is a test for how the target responds to unknown vpackets (which was incorrect)
* GDB wait for debugger option to allow debugging from bootstrap, and Event::Resume moved after renderer init so agent.interrupt() can pause the renderer
* Draw "Waiting for debugger", and fixed UI not rendering last frame before a state change
* Fixed GDB regs/mem endianness
When rendering happens after the render timeout (initial sega copyright
screen and more), the frame is never swapped and never displayed. Causes
a crash in vk since the acquired swapchain image is never
presented/released.
Refactor imgui backend code into imgui drivers for gl, vk, dx9
Generic GraphicsContext interface for gl/vk/dx9 contexts
Simplify graphics api switching code
dx9, gl(sdl): set swap interval based on monitor refresh rate.