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Use more stringent criteria for entering warp emulation mode

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Require more than one warp to the window center within a certain timespan (currently 30ms, but can be tweaked) to better avoid erroneously entering warp emulation mode.

This also correctly resets the warp emulation mode activation if the window loses and regains focus.
This commit is contained in:
Frank Praznik
2024-08-06 12:36:26 -04:00
committed by Sam Lantinga
parent 1a57ea7fba
commit ae8065e1ec
4 changed files with 55 additions and 22 deletions
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8
include/SDL3/SDL_hints.h
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@@ -2309,7 +2309,8 @@ extern "C" {
* A variable controlling whether warping a hidden mouse cursor will activate
* relative mouse mode.
*
* When this hint is set and the mouse cursor is hidden, SDL will emulate
* When this hint is set, the mouse cursor is hidden, and multiple warps to
* the window center occur within a short time period, SDL will emulate
* mouse warps using relative mouse mode. This can provide smoother and more
* reliable mouse motion for some older games, which continuously calculate
* the distance travelled by the mouse pointer and warp it back to the center
@@ -2318,9 +2319,8 @@ extern "C" {
* Note that relative mouse mode may have different mouse acceleration
* behavior than pointer warps.
*
* If your game or application needs to warp the mouse cursor while hidden for
* other purposes, such as drawing a software cursor, it should disable this
* hint.
* If your application needs to repeatedly warp the hidden mouse cursor at a
* high-frequency for other purposes, it should disable this hint.
*
* The variable can be set to the following values:
*