[poppler] Performance of the wrappers

[Kristian Høgsberg]

Frank Meerkoetter wrote:
> Hi,
> 
> in the current CVS all wrappers are dead slow when copying the bitmap
> data of the finished pdf. The reason for this is that they no longer use
> a memcpy but two nested getPixel()/setPixel() loops.
> 
> The splash output mode "ModeRGB8" used to have 4 bytes and could be copied
> directly into a QPixmap or an QImage. Currently "ModeRGB8" uses
> 3 bytes and QT does not support 24bit Images or Pixmaps.
> 
> I assumed we will need 32bit data in every case. So i tried other
> splash modes. ABGR8 worked strangly enough (i expected the colors would be
> wrong). The drawback with ABGR8 is that its implementation is incomplete
> (can't display images).
> 
> What should be done? Implementing a mode RGB8A? Fixing ABGR8?
> 
> Has anyone thought about how to solve this issue?

Is this actually something that shows up on a profile?  I'd think that 
actually rendering the PDF page would be much more time consuming than 
just copying the contents, even if the copying wasn't implemented optimally.

cheers,
Kristian