[Buildroot] QT application display problem
herve Bourricaud
herve.bourricaud at iaca-electronique.com
Fri Oct 26 15:42:01 UTC 2012
Hi zoltan
yes I'have compiled testapp and QT sample framebuffer app myself !
( just running the right qMake and then make with the right compiler :-)
running it I have 3 beautifuls rectangles Red,gree,blue on my LCD !
and this output on my console
# ./framebuffer
The framebuffer device was opened successfully.
Fixed screen info:
id:
smem_start: 0x23940000
smem_len: 261120
type: 0
type_aux: 0
visual: 2
xpanstep: 0
ypanstep: 1
ywrapstep: 0
line_length: 960
mmio_start: 0x700000
mmio_len: 4096
accel: 0
The framebuffer device was mapped to memory successfully.
Successfully switched to graphics mode.
Variable screen info:
xres: 480
yres: 272
xres_virtual: 480
yres_virtual: 272
yoffset: 0
xoffset: 0
bits_per_pixel: 16
grayscale: 0
red: offset: 0, length: 5, msb_right: 0
green: offset: 5, length: 6, msb_right: 0
blue: offset: 11, length: 5, msb_right: 0
transp: offset: 0, length: 0, msb_right: 0
nonstd: 0
activate: 0
height: 0
width: 0
accel_flags: 0x0
pixclock: 120816
left_margin: 2
right_margin: 2
upper_margin: 2
lower_margin: 2
hsync_len: 41
vsync_len: 10
sync: 3
vmode: 0
Frame Buffer Performance test...
Average: 6083 usecs
Bandwidth: 40.938 MByte/Sec
Max. FPS: 164.393 fps
Will draw 3 rectangles on the screen,
they should be colored red, green and blue (in that order).
Done.
#
so I suppose bit per pixels for frame buffer is 16 !
else how to check the frame buffer configuration ?
in buildroot
-> Package Selection for the target
│ -> Graphic libraries and applications (graphic/text)
│ -> Qt (BR2_PACKAGE_QT [=y])
│ -> Gui Module (BR2_PACKAGE_QT_GUI_MODULE [=y])
│ -> Pixel depths selected 8/15/16
must I only select 16 ?
thanks for your help !
hervé.
--
View this message in context: http://buildroot-busybox.2317881.n4.nabble.com/QT-application-display-problem-tp33619p33621.html
Sent from the Buildroot (busybox) mailing list archive at Nabble.com.
More information about the buildroot
mailing list