Add screen orientation support for Linux framebuffer

[ThadHouse]

Add screen orientation support for Linux DRM applications.

This is being continued on from #18658 to solve all the review comments from that PR, and change to a method that isn't Skia dependent and should work with any 2D backend.

Thanks @aguahombre for the initial implementation, I left your commits in here. I'm working on a project that needs this, so am willing to help push it across the finish line.

What does the pull request do?

Implement screen rotation for Linux kiosk applications for situations where the Linux drivers do not support all orientations of the display screen.
Supports 0, 90, 180 and 270 degree rotation of the display.
The touch screen input coordinates are also rotated to match the screen orientation.
Implemented in the output backend for DRM using an OpenGL shader and offscreen framebuffer. Only in the pipeline if there is a rotation requested, so no cost for no rotation.
Dynamic changing is not supported, must be set at DRM initialization time.
The names of the enum match the Android names and values to allow for a potential unification in the future.
The ControlCatalog program was updated to allow testing the functionality.

What is the current behavior?

See #18535 and #14241
Attempts to implement display rotation at the application level using RotateTransform on the MainView or EmbeddedRoutControl fail as any Combo and Popup menus appear unrotated and in the wrong position. Also, scrolling via touch input does not work for rotated views.

What is the updated/expected behavior with this PR?

Create a kiosk app with DrmOutputOptions Orientation set to one of the four SurfaceOrientation enum values to rotate the display output and touch input.

This has been tested on a Raspberry Pi 5 running a Raspberry Pi Touch Display 2.

How was the solution implemented (if it's not obvious)?

A 2nd framebuffer is created in DrmOutput when a rotation is requested to handle rotating the image into the DRM framebuffer.

Checklist

• Added unit tests (if possible)?
• Added XML documentation to any related classes?
• Consider submitting a PR to https://github.com/AvaloniaUI/avalonia-docs with user documentation

Breaking changes

No breaking changes, the scope is very limited and there should be no code differences with Rotation0 set.

Obsoletions / Deprecations

None

Fixed issues

Fixes #18535 and #14241

API Changes

 namespace Avalonia.Platform
 {
+    public enum SurfaceOrientation
+    {
+        Rotation0,
+        Rotation90,
+        Rotation180,
+        Rotation270,
+    }
}

 namespace Avalonia.LinuxFramebuffer
 {
     public class DrmOutputOptions
     {
+        public SurfaceOrientation Orientation { get; set; }
     }
 }

One big question is adding SurfaceOrientation to Avalonia.Platform going to be too big of a change to Android apps? Since it also has its own instance of SurfaceOrientation? The way #18658 was implemented, that enum needed to cross project boundaries, but with how this is implemented its entirely contained in the Framebuffer project. So we could move it completely into the Framebuffer project and namespace if that makes things easier.

[ThadHouse]

The failures are due to the API Change on IScreenInfoProvider and IOutputBackend. There is a way we can make this not breaking, but due to the change from 11 to 12 it kind of makes more sense to me to do the change, and doing it without breaking is a bit more ugly. But I'm fine doing it the non breaking way.

Removed the breaking changes so I could use the test builds.

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1 out of 2 committers have signed the CLA.

• @ThadHouse
• @aguahombre

[ThadHouse]

@cla-avalonia agree

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