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terminal: Only draw the line upon LF or when requested

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Ry 2022-11-25 17:20:03 -08:00
parent 8b977f9f9e
commit 7f6eeb10c7
1 changed files with 24 additions and 3 deletions
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27
terminal/text.asm
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@ -6,6 +6,11 @@ const TERMINAL_Y_SIZE: 25
const TEXT_COLOR: 0xFFFFFFFF
const BACKGROUND_COLOR: 0xFF000000
const FILL_TERM: 0xF0
const MOVE_CURSOR: 0xF1
const REDRAW_LINE: 0xFE
const REDRAW: 0xFF
; print a single character to the terminal
; inputs:
; r0: ASCII character or control character
@ -61,6 +66,8 @@ print_character_to_terminal_cr:
mov.8 [terminal_x], 0
jmp print_character_to_terminal_end
print_character_to_terminal_lf:
; draw the line
call redraw_terminal_line
; return to the beginning of the line and increment the line
mov.8 [terminal_x], 0
inc.8 [terminal_y]
@ -73,7 +80,6 @@ print_character_to_terminal_bs:
cmp.8 [terminal_x], 0
ifnz dec.8 [terminal_x]
print_character_to_terminal_end:
call redraw_terminal_line
pop r2
pop r1
pop r0
@ -98,13 +104,21 @@ handle_control_character:
ifz mov.8 [terminal_state], 0
; fill terminal
cmp.8 [terminal_control_char], 0xF0
cmp.8 [terminal_control_char], FILL_TERM
ifz jmp handle_control_character_fill_term
; set cursor position
cmp.8 [terminal_control_char], 0xF1
cmp.8 [terminal_control_char], MOVE_CURSOR
ifz jmp handle_control_character_set_cursor_pos
; redraw line
cmp.8 [terminal_control_char], REDRAW_LINE
ifz jmp handle_control_character_redraw_line
; redraw
cmp.8 [terminal_control_char], REDRAW
ifz jmp handle_control_character_redraw
ret
handle_control_character_fill_term:
push r0
@ -120,9 +134,16 @@ handle_control_character_fill_term_loop:
pop r0
ret
handle_control_character_set_cursor_pos:
call redraw_terminal_line
mov.8 [terminal_x], [terminal_control_parameter_1]
mov.8 [terminal_y], [terminal_control_parameter_2]
ret
handle_control_character_redraw_line:
call redraw_terminal_line
ret
handle_control_character_redraw:
call redraw_terminal
ret
; scroll the terminal
; inputs: