run QML APP on linux device : transparent the background ,then it will display all black or white

Alex_wang

ApplicationWindow
{
    id : mainWindow

    visible: true
    width: 1280
    height: 720

    flags: Qt.FramelessWindowHint
    color : "transparent"
}

run the QML APP , then the screen will display all white or black....

why ?

Eeli K

@Alex_wang Give your hardware, OS and graphics driver specs.

Alex_wang

@Eeli-K
hi,
I am running the QML APP on TI DM8168/AM389x,with the arch ArmV7-a8.
The linux kernel version : Linux version 2.6.37+
graphics driver : TI Graphics_SDK_4_03_00_02
so, it is not clear for graphics driver specs

Alex_wang

@Alex_wang

the error is caused by the frame buffer setting :
Alpha : 255 represents a fully transparent color, while 0 represents a fully opaque color

but the Qt5 is different :
Alpha : 0 represents a fully transparent color, while 255 represents a fully opaque color

so,I need to change the frame buffer setting for alpha;

anyone ideas ?