Updated comment when rendered image is too large

[IntraCherche]

Size image involves w * h * scale squared

[THausherr]

why squared?

[IntraCherche]

Because the code checks if ((long) widthPx * (long) heightPx > Integer.MAX_VALUE) and widthPx and heightPx are defined as

int widthPx = (int) Math.max(Math.floor(widthPt * scale), 1);
int heightPx = (int) Math.max(Math.floor(heightPt * scale), 1);

But then the error message uses widthPt and heightPt (not widthPx and heightPx as in the if check). So if you rewrite the the if check (just to understand) with widthPt and heightPt instead of widthPx and heightPx, you get :
widthPx * heightPx = widthPt * scale * heightPt * scale which in turn yields to widthPt * heightPt * scale * scale or widthPt * heightPt * scale ^ 2 which is the proposed update.

[THausherr]

Of course 😂
Good observation!