Setting a negative custom viewport Y makes the screen black on Vulkan

General
#1

I recently played with the custom viewport settings, and noticed on several different computers (Intel and AMD Ryzen CPUs) that if I try to set a negative value for the Y custom viewport with the Vulkan renderer, I get a black screen. The bug does not occur on GLcore, only on Vulkan. Tested on Linux every time, Retroarch 1.9.4.

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#2

yeah, anything that makes the image go off the screen blanks it completely with Vulkan for me.

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#3

As a work-around, you could use the Basic Mega Bezel shader preset to do the scaling and cropping.

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