Monitor can send data to the GPU. Using it directly in the shader should be faster than through the CPU.
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What’s the problem? The qestion is about Vulkan and SPIR-V.
He said “Posting Guideline 4”: “Clearly state your problem in your text”.
Also, odds are good that this is just a restatement of this SO question from earlier, which asks about directly accessing line data from the display device cable from within the “GPU”.
The answer hasn’t changed: you can’t.