Updated Multiple copy issues (markdown)

Multiple-copy-issues.md

@@ -1,11 +1,37 @@
-- Context API TLS
+## Context API TLS
-- Gamma ramp restoration
+
-- Video mode restoration
+Each copy of GLFW assumes nothing else makes a context current and that the context API's TLS slot remains in sync with its own.
-- Cocoa menu bar
+
-- Cocoa application delegate
+## Gamma ramp restoration
-- Disabled cursor mode
+
-- Win32 cursor trails setting
+Each copy of GLFW saves the original gamma ramp of a monitor immediately before the first time it is set.  The original ramp is then restored at termination.  Depending on order of termination, a copy may overwrite the correctly restored ramp with values set by a different copy.
-- X11 wait events
+
-- Wayland wait events
+## Video mode restoration
-- X11 clipboard transfer
+
-- Cocoa current directory
+Each copy of GLFW saves the original video mode of a monitor immediately before the first time it is set.  The original ramp is then restored at window iconification, window destruction or termination.  Depending on the order of operations, a copy may overwrite the correctly restored video mode with one set by a different copy.
+
+## Cocoa menu bar
+## Cocoa application delegate
+
+The Cocoa application singleton has a single slot for a delegate object.  Only one copy can have its delegate set.
+
+## Disabled cursor mode
+## Win32 cursor trails setting
+
+The cursor trails accessibility feature is disabled when entering full screen mode as it severely impacted OpenGL performance.  It is restored to its original setting when restoring the video mode.  If multiple copies create full screen windows, cursor trails will become disabled.
+
+## X11 wait events
+
+Each copy of GLFW has its own connection to the X server and events are only sent to the connection that created the window.  If one copy blocks waiting for events, windows created by other copies will stop responding.
+
+## Wayland wait events
+
+Each copy of GLFW has its own connection to the Wayland compositor and events are only sent to the connection that created the window.  If one copy blocks waiting for events, windows created by other copies will stop responding.
+
+## X11 clipboard transfer
+
+X11 clipboard transfer is an async protocol coordinated via window properties (😱) and clipboard retrieval is implemented via a custom event loop. This does not allow other copies to process events, meaning clipboard transfer between copies would deadlock.
+
+## Cocoa current directory
+
+By default the current directory is set to the Resources directory of the application bundle at init.  The init hint that controls this only affects that copy.