Bug 360830

Currently, pages are scaled with what appears to be bilinear filtering. While fast, this can often result in a blurry picture. While this isn't too much of an issue when reading a PDF document, it can be pretty annoying when reading small text in a CBZ that's zoomed in to fit the page width.

Examples for scaling filters can be found in mpv's documentation: https://mpv.io/manual/stable/#video-output-drivers-bilinear

I'd suggest Mitchell-Netravali, here's a PDF of the paper I found: www.cs.utexas.edu/users/fussell/courses/cs384g/lectures/mitchell/Mitchell.pdf

Additionally, the current bilinear interpolation should be done using GPU accelaration if available, if this isn't already the case, for performance and power saving purposes.

Reproducible: Always