ableos/sysdata/programs/render_example/src/examples/text.hb

.{memory, log, string} := @use("../../../../libraries/stn/src/lib.hb")
render := @use("../../../../libraries/render/src/lib.hb")

/* expected result:
   trash notepad app, colours should change with r,g,b,w keys */

psf := @embed("../../../../consolefonts/tamsyn/10x20r.psf")

send_byte := fn(byte: u8): u8 {
	memory.outb(96, byte)
	return memory.inb(96)
}

example := fn(): void {
	screen := render.init(true)
	font := render.text.font_from_psf2(@bitcast(&psf), false)

	msg := "ableboard (tm) (patent pending):\n\0"
	msg_len := string.length(msg)

	buf := memory.alloc(u8, 4096)

	@inline(memory.copy, u8, msg, buf, msg_len)
	cursor := buf + msg_len

	if font == null {
		return
	}

	_ = send_byte(238)
	log.info("PS/2 Driver Loaded\0")
	if send_byte(238) == 238 {
		log.info("PS/2 Keyboard Echoed\0")
	}
	if send_byte(244) == 250 {
		log.info("Enabled scanning\0")
	}

	color := render.white

	prev_input := 250

	loop {
		input := memory.inb(96)
		if input != prev_input {
			prev_input = input
			char := map_keys(input)
			if char != 0 {
				if char == 0xA {
					*cursor = 32
					cursor += 1;
					*cursor = 92
					cursor += 1
				} else if char == 0x72 {
					color = render.red
				} else if char == 0x67 {
					color = render.green
				} else if char == 0x62 {
					color = render.blue
				} else if char == 0x77 {
					color = render.white
				};
				*cursor = char
				cursor += 1
			}
		}
		render.clear(screen, render.black)
		render.put_text(screen, font, .(0, 0), color, buf)
		render.sync(screen)
	}

	return
}

map_keys := fn(inp: u8): u8 {
	if inp == 0x29 {
		return 0x7E
	} else if inp == 0x2 {
		return 0x31
	} else if inp == 0x3 {
		return 0x32
	} else if inp == 0x4 {
		return 0x33
	} else if inp == 0x5 {
		return 0x34
	} else if inp == 0x6 {
		return 0x35
	} else if inp == 0x7 {
		return 0x36
	} else if inp == 0x8 {
		return 0x37
	} else if inp == 0x9 {
		return 0x38
	} else if inp == 0xA {
		return 0x39
	} else if inp == 0xB {
		return 0x30
	} else if inp == 0xC {
		return 0x2D
	} else if inp == 0xD {
		return 0x3D
	} else if inp == 0x1C {
		return 0xA
	} else if inp == 0x10 {
		return 0x71
	} else if inp == 0x11 {
		return 0x77
	} else if inp == 0x12 {
		return 0x65
	} else if inp == 0x13 {
		return 0x72
	} else if inp == 0x14 {
		return 0x74
	} else if inp == 0x15 {
		return 0x79
	} else if inp == 0x16 {
		return 0x75
	} else if inp == 0x17 {
		return 0x69
	} else if inp == 0x18 {
		return 0x6F
	} else if inp == 0x19 {
		return 0x70
	} else if inp == 0x1E {
		return 0x61
	} else if inp == 0x1F {
		return 0x73
	} else if inp == 0x20 {
		return 0x64
	} else if inp == 0x21 {
		return 0x66
	} else if inp == 0x22 {
		return 0x67
	} else if inp == 0x23 {
		return 0x68
	} else if inp == 0x24 {
		return 0x6A
	} else if inp == 0x25 {
		return 0x6B
	} else if inp == 0x26 {
		return 0x6C
	} else if inp == 0x2C {
		return 0x7A
	} else if inp == 0x2D {
		return 0x78
	} else if inp == 0x2E {
		return 0x63
	} else if inp == 0x2F {
		return 0x76
	} else if inp == 0x30 {
		return 0x62
	} else if inp == 0x31 {
		return 0x6E
	} else if inp == 0x32 {
		return 0x6D
	} else if inp == 0x2B {
		return 0x5C
	} else if inp == 0x39 {
		return 32
	} else {
		return 0
	}
}