Setting number of tiles to render

[peto2006]

Hi,

Would it be possible to add setting of number of tiles to render? (Increasing it would probably consume more battery, so don't change default setting.)

Possible uses:

• When you are using vector maps and scrolling too look at neighboring areas, it is really slow. Higher setting would make moving map much nicer experience if surrounding areas are pre-rendered.
  
• I sometimes change zoom level to higher number (like 15 or 16), and lower "percentage zoom", so I can see big area with extreme detail. But when I zoom out to less than 50 percent, borders of screen are not covered with map.
  

Improvements on this idea (some of these are maybe overkill, but some would be nice):

• rectangular "render areas" (taking screen rotation into account) - because phones don't have square screens
  
• automatic option to fill screen + user set border (in %)
  
• render tiles in direction of moving screen first