- Enable VGA/FB to output box drawing characters while maintaining VT100
character set for serial. Shorten and simplify the screen setup code.
- Track the background color to decide if the serial output needs to be
inverted. Remove no longer needed logic for known areas of the screen that
need to be inverted. As a bonus - popup menu can now be also inverted on
serial.
- Reduce the amount of data sent to serial by using CR+LF when possible
instead of always relying on absolute positioning. Add tty_print()
for positioning the cursor, remove no longer needed tty_print().
- Remove no longer needed "LF -> LF+CR" logic from serial_echo_print().
Before (gcc-11.3.0-x86_64):
text data bss total filename
929 357 64 1350 system/serial.o
3517 1356 54 4927 app/display.o
After (gcc-11.3.0-x86_64):
text data bss total filename
907 336 64 1307 system/serial.o
3442 1242 54 4738 app/display.o
Co-authored-by: Sam Demeulemeester <38105886+x86fr@users.noreply.github.com>
* Add preliminary support for TTY Serial/UART (#15)
* Use shadow_buffer instead of VGA buffer to get a framebuffer-agnostic TTY supprot
* Added menu browsing & inputs from Serial TTY (#15)
* Add fix for degree symbol on TTY. Correct serial.c & serial.h file created with CRLF (#15)
* Move tty_error_redraw() to insure correct redraw when a error occurs
* Many reindent / cleanup
* Various optimization from @martinwhitaker comments
