Copying PGraphics to PImage using .get() or .copy() clears PGraphics object, if the renderer is P2D

Created by: agrshch

Description

An attempt of copying information from PGraphics to PImage using get() or copy() clears the PGraphics object if P2D renderer is used. It makes impossible many things, for example using PGraphics (or its copy) as a texture for the shader.

Expected Behavior

successful copying, like with default renderer

Current Behavior

both PGraphics and PImage are empty.

Steps to Reproduce

PGraphics img1;

void setup() {
size(300, 300, P2D);

img1 = createGraphics(200, 200, P2D);

img1.beginDraw();
img1.background(120);
img1.endDraw();

PImage img2 = img1.get(); // if comment out this line — grey rectangle appears
}

void draw() {
background(255);
image(img1, 100, 20);
}

Your Environment

• Processing version: 4.2
• Operating System and OS version: Mac OS 10.15.7
• Other information:

Comienza ejecutando el sketch P2D proporcionado y siguiendo los puntos de entrada get() y copy() de PGraphics en la biblioteca principal de Java. Compara el comportamiento de P2D con el renderizador predeterminado y comprueba por qué la fuente y el destino quedan vacíos. El trabajo estará terminado cuando la copia preserve el contenido de PGraphics y produzca una PImage con contenido bajo P2D.