This file lists the values of the framebuffer parameters that UI Core (Screen) is using.
The win-0 file in /dev/screen/0/ shows the configurations of the framebuffers that UI Core (Screen) is currently using.
From your target, you can see the configurations of the framebuffer that UI Core (Screen) is currently using by looking at the win-0 file in /dev/screen/0/win-0. The values you see from this file are the values that are currently used at the moment when you cat the file.
For example, you can use this command from your shell:
# cat /dev/screen/0/win-0/win-0
to see the framebuffer parameters currently used:
type = SCREEN_ROOT_WINDOW autonomous = 1 status = WIN_STATUS_REALIZED replaced = 0 references = 1 id string = display id = 1 plane id = 4 parent = (none) children = (none) window above = (none) window below = (none) alternate window = (none) insert id = 0 reclip = 0 updates = 0 locked = 0 valid = 0x00000008 class = framebuffer flags = WIN_FLAG_VISIBLE WIN_FLAG_FLOATING buffer size = 1280x720 format = SCREEN_FORMAT_RGBA8888 usage = SCREEN_USAGE_DISPLAY order = 0 sensitivity = SCREEN_SENSITIVITY_TEST swap interval = 1 holes = (none) regions = (none) flip = 0 mirror = 0 source viewport = (0,0 1280x720) source clip rectangle = (0,0;1280,720) clipped source viewport = (0,0;1280,720 1280x720) destination rectangle = (0,0 1280x720) destination clip rectangle = (0,0;1280,720) clipped destination rectangle = (0,0;1280,720 1280x720) rotation = 0 clipped rotation = 0 transparency = SCREEN_TRANSPARENCY_SOURCE_OVER global alpha = 255 -> 255 brightness = 0 contrast = 0 hue = 0 saturation = 0 scale quality = 0 idle mode = normal page viewport = (none) protection_enable = off cbabc mode = SCREEN_CBABC_MODE_NONE rcvids = (none) metrics.total.updates.count = 1 metrics.total.updates.pixels = 921600 pixels metrics.total.updates.reads = 0 bytes metrics.total.updates.writes = 3 Mbytes metrics.delta.updates.count = 1 metrics.delta.updates.pixels = 921600 pixels metrics.delta.updates.reads = 0 bytes metrics.delta.updates.writes = 3 Mbytes