Register GRAY8 image with cuGraphicsEGLRegisterImage

[michael_gruner]

Hi all

I’m trying to map a grayscale image to get a pointer to use with CUDA.

1. I get a FD for the HW buffer using ExtractFdFromNvBuffer
2. If I run NvBufferGetParams I can see that the format of this buffer is NvBufferColorFormat_GRAY8 (which is what I need).
3. Then I run NvEGLImageFromFd.
4. Finally I run cuGraphicsEGLRegisterImage.

This last step however returns CUDA_ERROR_NOT_SUPPORTED. Every other. Other formats such as RGBA or I420 work just fine. Is GRAY8 not supported?

Platform: Any Jetson board
Jetpack: 4.4
Multimedia API: 32.2.3

[njuffa]

Side remark: Jetson-specific question usually receive faster/better answer in the Jetson sub-forums

[michael_gruner]

Thanks @njuffa. For anyone else wondering the same, here’s a thread discussing the same which I didn’t find before. Basically GRAY8 is not supported (yet) in the EGL side.

cuGraphicsEGLRegisterImage and NvBufferColorFormat_GRAY8

Hi, Thanks for your question. Based on our document, there is no CUDA_ERROR_NOT_SUPPORTED return type in the cuGraphicsEGLRegisterImage. https://docs.nvidia.com/cuda/cuda-driver-api/group__CUDA__EGL.html#group__CUDA__EGL_1g9f9b026d175238be6f6e79048d6879c5 Would you mind to share a simple reproducible source so we can check it directly? Thanks.