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MUPDF/DGJPP test release! (Users)

posted by travolter(R), 21.02.2011, 19:50

> > request: could be posible add other resize mode options for low CPU
> users
> > or people that need to render each image constantly cause they display
> the
> > images zoomed-in and need to scroll down very often?
> I belive it could be possible but this would require go deep inside MuPDF
> sources. I have no idea how they inperpolate. I think it's done during
> rasterization of vector fonts and graphics so the rasterizer would need to
> be rewritten. Main application only tell target DPI and the engine will
> provide pointer to target bitmat that I simply draw (internal
> representation is 32bit truecolor BGRA so if you have 32bpp mode it is
> fitted 1:1 without any recalc. If you have 24/16/8bpp mode, recalculation
> is needed but also output data are smaller so less PCI bus load to fill the
> framebuffer...)

Oh I understand.. change the interpolation mode have to be difficult. Each time I watch the rendered images of Mupdf I dont notice any aliasing... all the curves are perfectly smooth.. so I imagine that they are using a high quaility interpolation resize that requires extra cpu. The bpp really not affect so much to the speed.. almost similar speed at 32 or lower.

There is any other setting to change the quality of the output rendered image so maybe it can be generated/displayed faster?


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