Qt example "textures" cannot render images on QNX x86 virtual machine

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Hi Everyone,
　I built and deployed the Qt4.8 example "textures", and ran it on QNX6.5.0 x86 virtual machine, but it only left black spaces where supposed to be images. (The Qt version I built on Ubuntu20.04 virtual machine with "-egl -opengl es2" options.)
　Does anyone know how to configure on the Qt side or the QNX side to make this example run normally? Thank you in advance!