incorrect uniform resolution

[AhmedMagedC]

Resolves#1063

Changes

correctly set the uniform resolution to reflect the changes in pixelDensity

Why?

when pixelDensity is set to 2 either implicitly (starting from Processing 4.4.3 version) ,or when called when creating a sketch
the physical resolution (width and height) is doubled, but that isn't reflected on the uniform resolution (the rendering resolution)
so for example in conway.glsl this piece of code vec2 position = ( gl_FragCoord.xy / resolution.xy ); results in inconsistent position (wrong scaling) because uniform resolution still uses the logical resolution specificed in size() function

Tests
i tested all shaders examples, and everything seems fine except for two examples

1. deform, mouseX and mouseY also isn't reflected the change of pixelDensity
   a simple solution is to multiple mouseX and mouseY by pixelDensity to reflect the correct position

2. DemoProjection this one is missed up, but i think it's related to the code written in sketch not sure about that

[AhmedMagedC]

Hi @Stefterv, how are you?
if you could please provide your feedback on this PR
for the DemoProjection example, it uses other uniforms like transform and modelView, so maybe more investigation is required of how these are being set and if they adapt the change of pixel density or not
so what do you think?

[tychedelia]

I'm not 100% sure about the other implications here, but viewports are typically expressed in terms of physical pixels. We may want to change PGraphicsOpenGL.setViewport to account for pixelDensity instead of only when writing the resolution uniform buffer. It loos like the only other uniform that uses this is the viewport uniform itself.