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kmsdrm: Report the panel orientation hint property

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Queries the "panel orientation" property on the connector and reports it in degrees of clockwise rotation via the 'SDL.display.KMSDRM.panel_orientation' display property.

This is provided by the kernel as a hint to userspace applications, and the application itself is ultimately responsible for any required coordinate transformations needed to conform to the requested orientation.
This commit is contained in:
Frank Praznik
2024-05-05 11:05:15 -04:00
parent 0411633bb2
commit 7d47d16526
2 changed files with 91 additions and 4 deletions
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14
include/SDL3/SDL_video.h
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@@ -409,6 +409,13 @@ extern DECLSPEC SDL_DisplayID SDLCALL SDL_GetPrimaryDisplay(void);
* enabled, this will be 1.0. This property can change dynamically when
* SDL_EVENT_DISPLAY_HDR_STATE_CHANGED is sent.
*
* On KMS/DRM:
*
* - `SDL_PROP_DISPLAY_KMSDRM_ORIENTATION_NUMBER`: the "panel orientation" property
* for the display in degrees of clockwise rotation. Note that this is provided
* only as a hint, and the application is responsible for any coordinate transformations
* needed to conform to the requested display orientation.
*
* \param displayID the instance ID of the display to query
* \returns a valid property ID on success or 0 on failure; call
* SDL_GetError() for more information.
@@ -420,9 +427,10 @@ extern DECLSPEC SDL_DisplayID SDLCALL SDL_GetPrimaryDisplay(void);
*/
extern DECLSPEC SDL_PropertiesID SDLCALL SDL_GetDisplayProperties(SDL_DisplayID displayID);
#define SDL_PROP_DISPLAY_HDR_ENABLED_BOOLEAN "SDL.display.HDR_enabled"
#define SDL_PROP_DISPLAY_SDR_WHITE_POINT_FLOAT "SDL.display.SDR_white_point"
#define SDL_PROP_DISPLAY_HDR_HEADROOM_FLOAT "SDL.display.HDR_headroom"
#define SDL_PROP_DISPLAY_HDR_ENABLED_BOOLEAN "SDL.display.HDR_enabled"
#define SDL_PROP_DISPLAY_SDR_WHITE_POINT_FLOAT "SDL.display.SDR_white_point"
#define SDL_PROP_DISPLAY_HDR_HEADROOM_FLOAT "SDL.display.HDR_headroom"
#define SDL_PROP_DISPLAY_KMSDRM_PANEL_ORIENTATION_NUMBER "SDL.display.KMSDRM.panel_orientation"
/**
* Get the name of a display in UTF-8 encoding.