Boot logo and wallpaper for a car head unit

Easiest by model: the Teyes CC3, SPRO Plus, CC2 Plus and X1 are 1280×720, the CC3 2K and CC4 Pro are 2000×1200, the first SPRO and CC2 are 1024×600. Unbranded 7–10 inch Android units are usually 1024×600 or 1280×720, wide BMW and Mercedes screens are 1920×720, and their factory stretched screens are 1280×480. If the model cannot be pinned down, «All sizes» builds six variants and the right one becomes clear after the first install.

Because that is how the FYT firmware loader reads it — the platform behind Teyes and most Android head units: it looks for a file called LOGO.bmp with 24-bit color at exactly the screen resolution. A JPG renamed to .bmp is not recognized, and a browser cannot write BMP at all, so the file is encoded separately, byte for byte to the format. For older WinCE units that take the logo from a memory card there is JPG.

Tick «Remove the field around the logo». The tool takes the color of the picture’s corners and makes everything close to it transparent with a soft edge, so no white box is left on a black boot screen. If the badge is dark and gets lost on black afterwards, one tick turns it white.

The share of the interface zones where a white icon has at least 3:1 contrast against the background — the WCAG threshold for large elements such as dock icons and the clock. It is measured on the frame as you have fitted it, with the current blur, so moving the picture changes the result just as darkening does. «Suggest» finds the least darkening at which icons read on 90 % of the area, so the photo is not made darker than necessary.

Yes, the «Animation» format in logo mode builds a bootanimation.zip: the logo and caption fade in and stay until booting finishes, the archive is uncompressed and desc.txt follows the Android standard. This feature is part of Premium. Installing needs root, and on the Teyes CC3 2K and CC4 Pro the animation partition is write-protected on stock firmware — there only LOGO.bmp will do.

No. The guides, the time and icon mock-up and the daylight and night simulation exist only on the tool’s screen. The file gets the clean image with the frame, darkening and blur you chose.