vo=gpu-next does not use r16ui to map planes, so no yuv420p10 support (GLES)

[sfan5]

Important Information

• mpv v0.37.0-546-g474e213f52
• Android 14
• Mali-G68 w/ GLES 3.2

Reproduction steps

Play 10-bit video

Expected behavior

vo_gpu
gpu.txt

Actual behavior

vo_gpu_next
gpu2.txt
here mpv does a conversion to gbrpf32 because it's the only >8-bit format the VO reports. this results in playback becoming a slideshow.

[haasn]

Seems like we need to allow for an extra UINT correction scaling factor, like what vo_gpu does in copy_image.