Is there a "no display and no I/O or port use" option so that U8g2 just renders to a buffer?

[Bodmer]

Reason for asking:
To easily port complex legacy Arduino sketches to a different display technology, e.g. TFT, by reading the display buffer and plotting to a screen. The monochrome out is fine btw. The aim is to not allocate ports or GPIO.

At the moment I use a constructor like this:

U8G2_SSD1306_128X64_NONAME_F_4W_SW_SPI u8g2(U8G2_R0, /* clock=*/ -1, /* data=*/ -1, /* cs=*/ -1, /* dc=*/ -1, /* reset=*/ -1);

Which works as all pins are set to -1, but is not very elegant.

Such an option is not obvious from examining the code for a while. I know about U8g2_for_Adafruit_GFX etc, but that is not what I need.

[olikraus]

No, there is no "null" driver for Arduino. I assume your approach is already the best what you could do.