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fn draw-box screen: (addr screen), row1: int, col1: int, row2: int, col2: int {
draw-horizontal-line screen, row1, col1, col2
draw-vertical-line screen, row1, row2, col1
draw-horizontal-line screen, row2, col1, col2
draw-vertical-line screen, row1, row2, col2
draw-top-left-corner screen, row1, col1
draw-top-right-corner screen, row1, col2
draw-bottom-left-corner screen, row2, col1
draw-bottom-right-corner screen, row2, col2
}
fn draw-hatching screen: (addr screen), row1: int, col1: int, row2: int, col2: int {
var c/eax: int <- copy col1
var r1/ecx: int <- copy row1
r1 <- increment
c <- add 2
{
compare c, col2
break-if->=
draw-vertical-line screen, r1, row2, c
c <- add 2
loop
}
}
fn draw-horizontal-line screen: (addr screen), row: int, col1: int, col2: int {
var col/eax: int <- copy col1
move-cursor screen, row, col
{
compare col, col2
break-if->=
print-code-point screen, 0x2500
col <- increment
loop
}
}
fn draw-vertical-line screen: (addr screen), row1: int, row2: int, col: int {
var row/eax: int <- copy row1
{
compare row, row2
break-if->=
move-cursor screen, row, col
print-code-point screen, 0x2502
row <- increment
loop
}
}
fn draw-top-left-corner screen: (addr screen), row: int, col: int {
move-cursor screen, row, col
print-code-point screen, 0x250c
}
fn draw-top-right-corner screen: (addr screen), row: int, col: int {
move-cursor screen, row, col
print-code-point screen, 0x2510
}
fn draw-bottom-left-corner screen: (addr screen), row: int, col: int {
move-cursor screen, row, col
print-code-point screen, 0x2514
}
fn draw-bottom-right-corner screen: (addr screen), row: int, col: int {
move-cursor screen, row, col
print-code-point screen, 0x2518
}
# erase parts of screen the slow way
fn clear-rect screen: (addr screen), row1: int, col1: int, row2: int, col2: int {
var i/eax: int <- copy row1
{
compare i, row2
break-if->
var j/ecx: int <- copy col1
move-cursor screen, i, j
{
compare j, col2
break-if->
print-grapheme screen 0x20/space
j <- increment
loop
}
i <- increment
loop
}
}
fn clear-rect2 screen: (addr screen), row1: int, col1: int, w: int, h: int {
var i/eax: int <- copy 0
var curr-row/esi: int <- copy row1
{
compare i, w
break-if->=
move-cursor screen, curr-row, col1
var j/ecx: int <- copy 0
{
compare j, h
break-if->=
print-grapheme screen 0x20/space
j <- increment
loop
}
i <- increment
curr-row <- increment
loop
}
}
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