1 files changed, 44 insertions, 0 deletions
diff --git a/apps/tile/box.mu b/apps/tile/box.mu
new file mode 100644
index 00000000..7cb69206
--- /dev/null
+++ b/apps/tile/box.mu
@@ -0,0 +1,44 @@
+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
+}
+
+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 0, 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 0, row, col
+    print-code-point screen, 0x2502
+    row <- increment
+    loop
+  }
+}