I want a GPU feature that lets me do multiple pixel shader passes with a single vertex shader. Each pass would get blended together. The goal being composable pixel shaders.
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Note also that subpasses are different from plain renderpasses, where vertex shaders execute one to one with fragment shaders. This sub renderpass behavior could also be implementation dependent, not sure if descrete graphics behave the same way as mobile.
Hm. Indeed, my understanding appears wrong. I'm going to have to dig into this. Thank you for pointing me in this direction!
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Separate draw call always makes the GPU go through the full pipeline, irrelevant of whether or not they’re a part of the same subpass or not, so no, you can’t really skip the vs. The way rps are built can benefit tiler archs, in that the rasterized tile data needs not be flushed
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every subpass for attachments that are reused across SPs. That’s why you have subpassLoad() and input attachments.
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So in retrospect, you might actually be correct in thinking subrenderpasses potentially call VS multiple times, like
@DomWitczak was saying.Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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