[Qt-interest] configure-flags: 3.3 vs 4.5 [embedded]

[Karl Krach]

Thanks for your answer!

I tried my best with the framebuffer example, but still don't know what my
problem can be. If you have a look at the following screenshot
http://www.bluespirit.la/tmp/framebuffer.jpg
you will see, that the "DD" is darker than the "BB". I looks like a 'little'
vs. 'big endian' problem, but it's not...

To sort the rectangles from dark to bright, I would say:

   014589CD  2367ABEF

The output of example says the following:

Fixed screen info:
        id:          SA1100
        smem_start:  0xc02c1000
        smem_len:    76800
        type:        0
        type_aux:    0
        visual:      3
        xpanstep:    0
        ypanstep:    0
        ywrapstep:   0
        line_length: 240
        mmio_start:  0x0
        mmio_len:    0
        accel:       0

The framebuffer device was mapped to memory successfully.

Was in graphics mode already. Skipping
Variable screen info:
        xres:           480
        yres:           320
        xres_virtual:   480
        yres_virtual:   320
        yoffset:        0
        xoffset:        0
        bits_per_pixel: 4
        grayscale: 1
        red:    offset:  0, length:  4, msb_right:  0
        green:  offset:  0, length:  4, msb_right:  0
        blue:   offset:  0, length:  4, msb_right:  0
        transp: offset:  0, length:  0, msb_right:  0
        nonstd:       0
        activate:     0
        height:       -1
        width:        -1
        accel_flags:  0x0
        pixclock:     675000
        left_margin:  2
        right_margin: 1
        upper_margin: 0
        lower_margin: 0
        hsync_len:    1
        vsync_len:    1
        sync:         3
        vmode:        0


Thanks,

Charly





Donal <donaloconnor at gmail.com> schrieb:
> If you compile the examples, there should be a frame buffer test
> application in /examples/qws/framebuffer
> 
> That gives you an idea of bit arrangements.
> 
> I had a problem with 16bit color where in fact it was 15 bits
> with one used for alpha but this bit was placed in a none
> standard location, right in the middle of the bit arrangements
> rather than the MSB or LSB.
> While QT 3.3 didn't support these bits, it just worked normally
> using the alpha bit as a least significant green bit and that
> worked as it was supposed to be used like that.
> However, in QT 4.x, it tried to use the alpha bit but in wrong
> place and display came out all wrong.
> 
> I don't know if you have similar problem but seems to look like
> it, though only 4 bits of color.
> 
> Regards,
> Donal
>