1 # Drawing ASCII text incrementally.
 2 #
 3 # To build a disk image:
 4 #   ./translate ex6.mu             # emits code.img
 5 # To run:
 6 #   qemu-system-i386 code.img
 7 # Or:
 8 #   bochs -f bochsrc               # bochsrc loads code.img
 9 #
10 # Expected output: a box and text that doesn't overflow it
11 
12 fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) {
13   # drawing text within a bounding box
14   draw-box-on-real-screen 0xf, 0x1f, 0x79, 0x51, 0x4
15   var x/eax: int <- copy 0x20
16   var y/ecx: int <- copy 0x20
17   x, y <- draw-text-wrapping-right-then-down screen, "hello ",     0x10/xmin, 0x20/ymin, 0x78/xmax, 0x50/ymax, x, y, 0xa/fg, 0/bg
18   x, y <- draw-text-wrapping-right-then-down screen, "from ",      0x10/xmin, 0x20/ymin, 0x78/xmax, 0x50/ymax, x, y, 0xa/fg, 0/bg
19   x, y <- draw-text-wrapping-right-then-down screen, "baremetal ", 0x10/xmin, 0x20/ymin, 0x78/xmax, 0x50/ymax, x, y, 0xa/fg, 0/bg
20   x, y <- draw-text-wrapping-right-then-down screen, "Mu!",        0x10/xmin, 0x20/ymin, 0x78/xmax, 0x50/ymax, x, y, 0xa/fg, 0/bg
21 
22   # drawing at the cursor in multiple directions
23   draw-text-wrapping-down-then-right-from-cursor-over-full-screen screen, "abc", 0xa/fg, 0/bg
24   draw-text-wrapping-right-then-down-from-cursor-over-full-screen screen, "def", 0xa/fg, 0/bg
25 
26   # test drawing near the edge
27   x <- draw-text-rightward screen, "R", 0x7f/x, 0x80/xmax=screen-width, 0x18/y, 0xa/fg, 0/bg
28   draw-text-wrapping-right-then-down-from-cursor-over-full-screen screen, "wrapped from R", 0xa/fg, 0/bg
29 
30   x <- draw-text-downward screen, "D", 0x20/x, 0x2f/y, 0x30/ymax=screen-height, 0xa/fg, 0/bg
31   draw-text-wrapping-down-then-right-from-cursor-over-full-screen screen, "wrapped from D", 0xa/fg, 0/bg
32 }