rendervulkan: Add PIXEL filter (band-limited pixel filter) #974
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…ammas Fixes blending of PQ/HDR10 and 10-bit sRGB surfaces
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Adds a "pixel" filter which is a band-limited pixel filter based on https://github.com/Themaister/Granite/blob/master/assets/shaders/inc/bandlimited_pixel_filter.h by Hans-Kristian. Closes: #712
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Adds a "Sharp" filter which is a band-limited pixel filter based on
https://github.com/Themaister/Granite/blob/master/assets/shaders/inc/bandlimited_pixel_filter.h
by Hans-Kristian.
Also emulates bilinear sampling for HDR10 PQ content to blend in the right space.
Closes: #712