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Make joystick platform code init on demand

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This makes joystick support initialize the first time a joystick
function is called, including those gamepad functions that are layered
on top of joystick functions.

Related to #1284.
Related to #1646.
This commit is contained in:
Camilla Löwy
2020-07-12 18:31:29 +02:00
parent f760b124ca
commit 782e6b6cef
19 changed files with 101 additions and 49 deletions
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docs/news.dox
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@@ -55,6 +55,21 @@ applications.
@subsection caveats_34 Caveats for version 3.4
@subsubsection joysticks_34 Joystick support is initialized on demand
The joystick part of GLFW is now initialized when first used, primarily to work
around faulty Windows drivers that cause DirectInput to take up to several
seconds to enumerate devices.
This change will usually not be observable. However, if your application waits
for events without having first called any joystick function or created any
visible windows, the wait may never unblock as GLFW may not yet have subscribed
to joystick related OS events.
To work around this, call any joystick function before waiting for events, for
example by setting a [joystick callback](@ref joystick_event).
@subsubsection standalone_34 Tests and examples are disabled when built as a sub-project
GLFW now does not build the tests and examples when it is added as