We are using the nppiAlphaComp_8u_AC4R_Ctx() API to merge a transparent background with a foreground image.
Intermittently, when the GPU is busy, the output image sometimes has an issue where the foreground image is missing in the rightmost region. The output image size is 190x190, and the issue occurs only in the rightmost 176px width region.
We are ensuring that the size-related parameters (such as step and ROI) passed to nppiAlphaComp_8u_AC4R_Ctx() are aligned to 4px horizontally and 2px vertically.
Given that the issue appears precisely at 176px on the right, we suspect that the required horizontal alignment might be 16px instead of 4px.
Could you clarify what the required alignment (multiple of which value) should be for the parameters passed to nppiAlphaComp_8u_AC4R_Ctx()?
Thank you in advance for your help!
