path: root/baremetal/ex6.mu

# Drawing ASCII text incrementally.
#
# To build a disk image:
#   ./translate_mu_baremetal baremetal/ex6.mu     # emits disk.img
# To run:
#   qemu-system-i386 disk.img
# Or:
#   bochs -f baremetal/boot.bochsrc               # boot.bochsrc loads disk.img
#
# Expected output: a box and text that doesn't overflow it

fn main {
  # drawing text within a bounding box
  draw-box-on-real-screen 0xf, 0x1f, 0x79, 0x51, 0x4
  var x/eax: int <- copy 0x20
  var y/ecx: int <- copy 0x20
  x, y <- draw-text-wrapping-right-then-down 0, "hello ",     0x10, 0x20, 0x78, 0x50, x, y, 0xa  # (0x10, 0x20) -> (0x78, 0x50)
  x, y <- draw-text-wrapping-right-then-down 0, "from ",      0x10, 0x20, 0x78, 0x50, x, y, 0xa
  x, y <- draw-text-wrapping-right-then-down 0, "baremetal ", 0x10, 0x20, 0x78, 0x50, x, y, 0xa
  x, y <- draw-text-wrapping-right-then-down 0, "Mu!",        0x10, 0x20, 0x78, 0x50, x, y, 0xa

  # drawing at the cursor in multiple directions
  draw-text-wrapping-down-then-right-from-cursor-over-full-screen 0, "abc", 0xa
  draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, "def", 0xa

  # test drawing near the edge
  x <- draw-text-rightward 0, "R", 0x3f8, 0x400, 0x100, 0xa  # 0x400 = screen-width
  draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0, "wrapped from R", 0xa

  x <- draw-text-downward 0, "D", 0x100, 0x2f0, 0x300, 0xa  # 0x300 = screen-height
  draw-text-wrapping-down-then-right-from-cursor-over-full-screen 0, "wrapped from D", 0xa
}