Comments (4)
Thanks! I'll close the issue so it doesn't keep around, and will research the reason of this not working as I think it should.
I'll post back if I ever find the correct way of doing this.
from docs.
Use drmModeAddFB2()
(see modeset-atomic.c for an example). This call allows specifying the encoding (well, also the color-space in a sense, but not exactly, since sRGB and friends need further configuration).
from docs.
This call allows specifying the encoding (well, also the color-space in a sense, but not exactly, since sRGB and friends need further configuration).
The issue is that I don't always know the correct encoding/colorspace beforehand, the idea is to find it out using any other drm api if it exists
For example, using fbdev, you could know it by checking the red/green/blue offsets
from docs.
I think the idea is that you specify which one to use and the hardware adapts, not the other way around. However, there is likely a way to query the crtc/encoders for the supported four-cc codes, but I am currently not sure about it. I recommend checking what the existing compositors do and how they decide what to use as argument to drmModeAddFB2
.
from docs.
Related Issues (12)
- about atomic mode setting HOT 3
- Can modeset example rending in YUV domain instead of RGB?
- Hot unplug display
- How to know the supported color formats HOT 3
- cannot set CRTC for connector 42 (22): Invalid argument HOT 1
- docs/drm-howto /modeset.c modeset_draw(): Not expected display Gradient color but Fixed color ? HOT 2
- CRT problems HOT 3
- DRM enable alpha channel
- modeset.c shows justa black screen in QEMU aarch64 -device virtio-gpu-pci HOT 2
- Invalid Argument under xilinx zcu102 platform HOT 3
- modeset output permission denied HOT 2
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from docs.