P2b9 : PImage scaling not working on retina MBP

[robotconscience]

Steps to reproduce:

• make a 1024x768 window
• load a 200x200 image
• draw image w/ image(myImage, 0, 0, width, height);

Expected behavior:

• Image scales to screen

What happens:

• Image draws at its actual size anchored to bottom right of screen

Works like a charm on non-retina Macbook Pro!

[datguy]

Can you provide any more detail? I tried to reproduce it with the following sketch and the attached image, and it worked as expected.

size(1024,768);
PImage img = loadImage("image.jpg");
image(img,0,0,width,height);

[robotconscience]

Sorry, just looked at my post and I misspoke! It was actually specific to a PGraphics object. I (mistakenly) assumed the bug would be with PImages as well.

[REAS]

@robotconscience Please post a simple, short example that shows the problem so we can test it easily.

[robotconscience]

Sure! After digging into the code a bit (my error was specifically with using the Syphon lib) the bug is much more specific. A texture drawn to a PGraphics object via PGraphicsOpenGL does not scale, although the rest of the PGraphics seems to. It's very specific, but pops up immediately with the Syphon library (and behaves as expected on non Retina Macbooks). Hope this helps!

PGraphics dest;
PImage img;

void setup()
{
  size(800, 600, OPENGL);
  img = loadImage("test.jpeg");
  image(img,0,0);
  dest = createGraphics(img.width, img.height, PConstants.P2D);

  println(img.width +":"+ img.height);

  PGraphicsOpenGL destpg = (PGraphicsOpenGL)dest;

  destpg.beginDraw();
  Texture tex = destpg.getTexture(img);
  destpg.background(255,0,0);
  destpg.drawTexture(tex.glTarget, tex.glName, tex.glWidth, tex.glHeight, 
                     0, 0, tex.glWidth, tex.glHeight);
  destpg.endDraw();
}

void draw() {
  image( dest, 0,0,width, height);
}

[codeanticode]

Hi-Dpi Mode is not supported yet by the underlying opengl-java bindings (JOGL in the default OpenGL renderer):

http://forum.jogamp.org/Retina-support-in-OSX-td4029248.html#a4029251

so this might have something to do with this issue (and possibly with #1699 as well), however if that's the case the solution depends on JOGL adding support for Retina.

[benfry]

There is also no "Texture" API supported in Processing. No getTexture(), drawTexture(), etc. You're filing bugs against undocumented features that are not supported.

[robotconscience]

Ok! No problem; it looks like it'd be better to submit it against Syphon, then. Thanks!

[github-actions]

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