method changes for hidpi/retina renderer changes in 3.0 #170

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1. scotthmurray

   added this to the 3.0 milestone on Nov 22, 2014
2. REAS

   self-assigned this

   on Sep 17, 2015
3. REAS

   added

   high priority

   on Jul 25, 2019
4. REAS commented on Jul 26, 2019

   

   REAS

   on Jul 26, 2019

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   OK, I tried to clarify this, mostly with added description in pixelDensity(), but with new examples in pixelWidth and pixelHeight. Some additions to pixels[] as well. Let's see how this goes.
5. REAS

   closed this as completedon Jul 26, 2019
6. Sgsethu commented on Sep 21, 2025

   

   Sgsethu

   on Sep 21, 2025

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   When using a retina/hidpi version of a PGraphics (or PImage, for that matter), all pixel operations happen in 2x space. This has an effect on:

   • updatePixels(...)
   • get(...)
   • set(...)
   • copy(...)
   • blend(...)

   The pixelFactor variable is 2 for retina, 1 normally. The pixelWidth and pixelHeight fields cover the actual size of the pixels[] array.