Frame buffer - what is it for?

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Tomas Hamouz

• February 10, 2023 11:55

In Release Notes for CW 4.10.0 there is a mention about frame buffer.

>Added support for ARGB32, RGB16, RGB888, RGB666, RGB555, RGB444 and >monochrome formats to
>frame buffer window.

What is frame buffer in Crossworks for? There is no other mention in the manual about ït, only Height/Width/Tooltips. 

 

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  Jon Elliott

  • February 10, 2023 12:31

  The frame buffer window is similar to the memory window. Instead of displaying the memory as data values or text as the memory window does, it displays the memory as an image encoded in the selected format.

  Click View > Other Windows > Frame Buffer to open the window.

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  Tomas Hamouz

  • February 10, 2023 13:30

  Great!

  Trying various formats, does RGB16 mean RGB565? By eye it seems so, but I am not sure. I would prefer name it RGB565, it is coherent with other formats.

  And if I can kindly ask for improvement, add Save as (BMP, PNG...)

  But again, it is GREAT feature! Thanks!

   

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  Jon Elliott

  • February 17, 2023 10:17

  Yes, RGB16 does mean RGB565.

  The latest daily snapshot build now has "Save As" and "Copy To Clipboard" commands.

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  Tomas Hamouz

  • March 22, 2023 10:23

  Small bug in framebuffer Save As:

   - focus code editor

   - right click frame buffer

  - Save xxxxx.x As... appears, where xxxxx.x is current file in editor

  If other window has focus, both Copy and Save As are disabled, but e.g zoom in/out are enabled and working (but not Reset zoom).

   

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  Jon Elliott

  • March 24, 2023 08:39

  Thanks, this issue should be fixed in the latest daily snapshot build.

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  Tomas Hamouz

  • October 25, 2023 10:29

  Hi,

  found another small bug in framebuffer window.

  Format Mono (both MSB and LSB) rounds line length to 4 bytes.

  My example: buffer 176 px wide x 264 px high. The line length is 22 bytes. Buffer address 0x20006ED0, second line should start at 0x20006EE6, but it starts at 0x20006EE8. i.e line length is rounded to 24 bytes. The same is for the rest of the scanlines.

   

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  Jon Elliott

  • October 27, 2023 16:04

  Thanks Tomas, this issue should be fixed in the latest daily snapshot build.

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  Tomas Hamouz

  • February 13, 2026 11:08

  Hi, 
  a kind request after 2 years of using this feature: Nice improvement to the frame buffer viewer could be a possibility to rotate the view. We are using a display which can't rotate the view in the controller, so we have to rotate the data written to the frame buffer. But in the viewer the content is upside down now.

  Thanks in advance

   

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  Jon Elliott

  • February 16, 2026 17:57

  Thanks for the suggestion Tomas - the frame buffer window in the latest 5.4.1 daily snapshot build now has options in the context menu to rotate and/or flip the view.

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