Question

Is there a pushMatrix()/popMatrix() analog to this processing code that tries to assign custom attributes to text?

pushMatrix();
textAlign(CENTER);
fill(0, 255, 0);
text("Hello world.", 0, 0);
popMatrix();

This code does not work; the popMatrix() does not undo the attribute assignments. Any text typed after popMatrix() is still center-aligned and green.

Answer 1

Yes, there is, and it applies to all styles(fill(),stroke(),etc.) , not just text attributes: have a look at pushStyle()

From docs:

The pushStyle() function saves the current style settings and
popStyle() restores the prior settings. Note that these functions are
always used together. They allow you to change the style settings and
later return to what you had. When a new style is started with
pushStyle(), it builds on the current style information. The
pushStyle() and popStyle() functions can be embedded to provide more
control (see the second example above for a demonstration.)

The style information controlled by the following functions are
included in the style: fill(), stroke(), tint(), strokeWeight(),
strokeCap(), strokeJoin(), imageMode(), rectMode(), ellipseMode(),
shapeMode(), colorMode(), textAlign(), textFont(), textMode(),
textSize(), textLeading(), emissive(), specular(), shininess(),
ambient()