updating not all pixels but only within a region

NATALAN

Hello,

updatePixels() updates the pixels of the whole image, right? Is there any change to update only a section of an image to keep performance? I noticed a updatePixels(x,y,w,h) function, but it is "not available with this renderer", so did not work for me.

Thanks in advance and greetz!

jeremydouglass

@NATALAN: Which renderer are you using? Can you please provide a simple example sketch?

updatePixels() may already be optimized where possible -- have you checked the source?

• https://github.com/processing/processing/search?utf8=✓&q=updatepixels&type=

If further optimization is possible one idea might be to using image tiling (e.g. breaking your large image into multiple PImages) and only update a given tile. Whether this would have any practical speed-up effect or even be counter-productive partly depends on the size of your images.

For an example, the UnfoldingMaps library uses a tile system.

• http://unfoldingmaps.org/
• http://unfoldingmaps.org/tutorials/mapprovider-and-tiles.html