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Mouse coordinates are floating point

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You can get sub-pixel mouse coordinates and motion depending on the platform and display scaling.

Fixes https://github.com/libsdl-org/SDL/issues/2999
This commit is contained in:
Sam Lantinga
2022-12-29 19:31:12 -08:00
parent 8c3239dee5
commit cefbeb582f
52 changed files with 564 additions and 654 deletions
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6
docs/README-migration.md
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@@ -82,6 +82,8 @@ The timestamp_us member of the sensor events has been renamed sensor_timestamp a
You should set the event.common.timestamp field before passing an event to SDL_PushEvent(). If the timestamp is 0 it will be filled in with SDL_GetTicksNS().
Mouse events use floating point values for mouse coordinates and relative motion values. You can get sub-pixel motion depending on the platform and display scaling.
The SDL_DISPLAYEVENT_* events have been moved to top level events, and SDL_DISPLAYEVENT has been removed. In general, handling this change just means checking for the individual events instead of first checking for SDL_DISPLAYEVENT and then checking for display events. You can compare the event >= SDL_DISPLAYEVENT_FIRST and <= SDL_DISPLAYEVENT_LAST if you need to see whether it's a display event.
The SDL_WINDOWEVENT_* events have been moved to top level events, and SDL_WINDOWEVENT has been removed. In general, handling this change just means checking for the individual events instead of first checking for SDL_WINDOWEVENT and then checking for window events. You can compare the event >= SDL_WINDOWEVENT_FIRST and <= SDL_WINDOWEVENT_LAST if you need to see whether it's a window event.
@@ -411,6 +413,8 @@ used by additional platforms that didn't have a SDL_RunApp-like function before)
SDL_ShowCursor() has been split into three functions: SDL_ShowCursor(), SDL_HideCursor(), and SDL_CursorVisible()
SDL_GetMouseState(), SDL_GetGlobalMouseState(), SDL_GetRelativeMouseState(), SDL_WarpMouseInWindow(), and SDL_WarpMouseGlobal() all use floating point mouse positions, to provide sub-pixel precision on platforms that support it.
The following functions have been renamed:
* SDL_FreeCursor() => SDL_DestroyCursor()
@@ -463,6 +467,8 @@ which index is the "opengl" or whatnot driver, you can just pass that string dir
here, now. Passing NULL is the same as passing -1 here in SDL2, to signify you want SDL
to decide for you.
SDL_RenderWindowToLogical() and SDL_RenderLogicalToWindow() take floating point coordinates in both directions.
The following functions have been renamed:
* SDL_RenderCopy() => SDL_RenderTexture()
* SDL_RenderCopyEx() => SDL_RenderTextureRotated()