Improve scaling quality of Windows direct3d renderer

[rustyx]

On Windows, the default renderer is direct3d which is nice because it's much faster than opengl.
But unfortunately this renderer doesn't seem to support trilinear filtering as is evident from the log:

[server] INFO: Device: samsung SM-N910C (Android 6.0.1)
INFO: Renderer: direct3d
WARN: Trilinear filtering disabled (not an OpenGL renderer)
INFO: Initial texture: 1440x2560

Is there any chance of improving the jagged scaling with Direct3D? Tried forcing hardware-accelerated antialiasing via NVIDIA control panel to no avail.

Environment

• OS: Windows 10 x64
• scrcpy version: scrcpy 1.13
  dependencies:
• SDL 2.0.12
• libavcodec 58.54.100
• libavformat 58.29.100 - libavutil 56.31.100
• installation method: Windows release

[rom1v]

Ref: #1394 (comment)

[cjxgm]

@rustyx Are you sure about direct3d being much faster than opengl, even on NVIDIA hardware? I know that other vendors do not have good enough opengl drivers for Windows (thus direct3d support for trilinear filtering is still needed), but NVIDIA's opengl driver should be as fast as direct3d.

[rustyx]

@cjxgm yes, direct3d definitely feels more responsive and uses much less CPU, too:

• --max-fps=20 --render-driver=opengl : 80% of 1 CPU used
• --max-fps=20 --render-driver=direct3d: 1% of 1 CPU used

[cjxgm]

Wow that's unexpected and strange. Looks like bug to me (VSync issue?). Should probably open a new issue for that.

[JianYuhaha]

Do you fix the problem? I get it too.

[rom1v]

I submitted an issue on SDL few months ago: libsdl-org/SDL#4156