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by hal9K
Mon Apr 25, 2016 1:48 pm
Forum: Graphics programming
Topic: OMX.broadcom.image_decode to vc_dispmanx
Replies: 0
Views: 789

OMX.broadcom.image_decode to vc_dispmanx

The OMX.video_render can't handle transparency in still images. I would like use vc_dispmanx instead, but i am not sure how to connect the output of the image_decode component to vc_dispmanx. Can i save the output of the image_decode component to a buffer and pass that buffer to vc_dispmanx (using v...
by hal9K
Sat Apr 09, 2016 7:58 pm
Forum: Camera board
Topic: OMX_CONFIG_CAMERASENSORMODETYPE
Replies: 2
Views: 263

Re: OMX_CONFIG_CAMERASENSORMODETYPE

Thanks a lot for the quick response. I am just curious what they mean since i couldn't figure it out on my own. I am writing a program using the ilclient and openmax in order to get a direct camera port 70 (preview port) to video_render port 90 pipeline and stumbled across those variables i asked ab...
by hal9K
Sat Apr 09, 2016 7:02 pm
Forum: Camera board
Topic: OMX_CONFIG_CAMERASENSORMODETYPE
Replies: 2
Views: 263

OMX_CONFIG_CAMERASENSORMODETYPE

When reading the OMX_CONFIG_CAMERASENSORMODETYPE (using OMX_IndexConfigCameraSensorModes) the numbers stored in the variables nFrameRateMax and nFrameRateMin do not make any sense to me, since I expected values in the usual fps range. Can anybody tell me, what these variables (nFrameRateMax & nFrame...
by hal9K
Mon Mar 21, 2016 11:30 am
Forum: Graphics programming
Topic: dispmanx: src_rect and dst_rect
Replies: 2
Views: 994

Re: dispmanx: src_rect and dst_rect

Thank you for the explanation Jamesh.
by hal9K
Sun Mar 20, 2016 9:51 pm
Forum: Graphics programming
Topic: dispmanx: src_rect and dst_rect
Replies: 2
Views: 994

dispmanx: src_rect and dst_rect

The dispmanx API is using source and destination rectangles, which (as far as i know) can be used to do hardware scaling of images and setting their position on screen. Is that all they are supposed to do or is there anything else we should know about those structs? Another thing i can't figure out ...
by hal9K
Sun Mar 20, 2016 12:43 pm
Forum: Graphics programming
Topic: Question regarding "pitch"
Replies: 6
Views: 1218

Re: Question regarding "pitch"

Hi Andy, raspidmx is already my primary source for information - your pngviewer actually was my starting point to dig into libpng. Thank you for all the effort you put in there - i think it's quite impressive that you got so far without any serious documentation. I did look at the Weston repository ...
by hal9K
Sat Mar 19, 2016 7:16 pm
Forum: Graphics programming
Topic: Question regarding "pitch"
Replies: 6
Views: 1218

Re: Question regarding "pitch"

Thank you very much for that detailed answer to my question - it helps a lot since useful and reliable information on the dispmanx api is rare and sometimes hard to find. Keep up the great work!
by hal9K
Sat Mar 19, 2016 5:59 pm
Forum: Graphics programming
Topic: Question regarding "pitch"
Replies: 6
Views: 1218

Re: Question regarding "pitch"

Thank you, Peter. Sounds like it's nothing to worry about.
by hal9K
Sat Mar 19, 2016 2:32 pm
Forum: Graphics programming
Topic: Question regarding "pitch"
Replies: 6
Views: 1218

Question regarding "pitch"

I am playing around with the dispmanx API example (hello_dispmanx) and have some trouble to grasp the concept of pitch. According to Jamesh: Pitch is the number of bytes to go from one row to the same X position on the next. Pitch will need to be a multiple of 16 (so even a width of %16 != 0 will st...
by hal9K
Tue Mar 08, 2016 6:49 am
Forum: Troubleshooting
Topic: gcc ARM options
Replies: 20
Views: 5908

Re: gcc ARM options

Thank you very much for your detailed explanation and for posting a bug report.
by hal9K
Mon Mar 07, 2016 7:51 pm
Forum: Troubleshooting
Topic: gcc ARM options
Replies: 20
Views: 5908

gcc ARM options

Hi, i am trying to use the command gcc -mcpu=native -march=native -Q --help=target on my RasPi 3 with gcc version 4.9.2 (Raspbian 4.9.2-10) and the following message appears: *** Error in `gcc': double free or corruption (top): 0x01099c18 *** As far as I know these compiler flags should be supported...

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