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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<title>Mu - apps/tile/surface.mu</title>
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+<meta name="plugin-version" content="vim8.1_v1">
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+* { font-size:12pt; font-size: 1em; }
+.CommentedCode { color: #8a8a8a; }
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+.Delimiter { color: #c000c0; }
+.muFunction { color: #af5f00; text-decoration: underline; }
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+-->
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+<a href='https://github.com/akkartik/mu/blob/master/apps/tile/surface.mu'>https://github.com/akkartik/mu/blob/master/apps/tile/surface.mu</a>
+<pre id='vimCodeElement'>
+<span id="L1" class="LineNr">  1 </span><span class="muComment"># A surface is a large 2-D grid that you can only see a subset of through the</span>
+<span id="L2" class="LineNr">  2 </span><span class="muComment"># screen.</span>
+<span id="L3" class="LineNr">  3 </span><span class="muComment"># Imagine a pin going through both surface and screen. As we update the</span>
+<span id="L4" class="LineNr">  4 </span><span class="muComment"># surface contents, the pinned point stays fixed, providing a sense of</span>
+<span id="L5" class="LineNr">  5 </span><span class="muComment"># stability.</span>
+<span id="L6" class="LineNr">  6 </span>
+<span id="L7" class="LineNr">  7 </span><span class="PreProc">type</span> <a href='surface.mu.html#L7'>surface</a> <span class="Delimiter">{</span>
+<span id="L8" class="LineNr">  8 </span>  <a href='../../405screen.mu.html#L9'>screen</a>: (handle <a href='../../405screen.mu.html#L9'>screen</a>)
+<span id="L9" class="LineNr">  9 </span>  data: (handle array <a href='../../405screen.mu.html#L20'>screen-cell</a>)
+<span id="L10" class="LineNr"> 10 </span>  nrows: int
+<span id="L11" class="LineNr"> 11 </span>  ncols: int
+<span id="L12" class="LineNr"> 12 </span>  screen-nrows: int
+<span id="L13" class="LineNr"> 13 </span>  screen-ncols: int
+<span id="L14" class="LineNr"> 14 </span>  pin-row: int  <span class="muComment"># 1-indexed</span>
+<span id="L15" class="LineNr"> 15 </span>  pin-col: int  <span class="muComment"># 1-indexed</span>
+<span id="L16" class="LineNr"> 16 </span>  pin-screen-row: int  <span class="muComment"># 1-indexed</span>
+<span id="L17" class="LineNr"> 17 </span>  pin-screen-col: int  <span class="muComment"># 1-indexed</span>
+<span id="L18" class="LineNr"> 18 </span><span class="Delimiter">}</span>
+<span id="L19" class="LineNr"> 19 </span>
+<span id="L20" class="LineNr"> 20 </span><span class="muComment"># intended mostly for tests; could be slow</span>
+<span id="L21" class="LineNr"> 21 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L21'>initialize-surface-with</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), in: (addr array byte) <span class="Delimiter">{</span>
+<span id="L22" class="LineNr"> 22 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L23" class="LineNr"> 23 </span>  <span class="muComment"># fill in nrows, ncols</span>
+<span id="L24" class="LineNr"> 24 </span>  <span class="PreProc">var</span> nrows/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> <a href='surface.mu.html#L265'>num-lines</a> in
+<span id="L25" class="LineNr"> 25 </span>  <span class="PreProc">var</span> dest/<span class="Constant">eax</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, nrows
+<span id="L26" class="LineNr"> 26 </span>  copy-to *dest, nrows
+<span id="L27" class="LineNr"> 27 </span>  <span class="PreProc">var</span> ncols/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> <a href='surface.mu.html#L282'>first-line-length</a> in  <span class="muComment"># assume all lines are the same length</span>
+<span id="L28" class="LineNr"> 28 </span>  dest <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, ncols
+<span id="L29" class="LineNr"> 29 </span>  copy-to *dest, ncols
+<span id="L30" class="LineNr"> 30 </span>  <span class="muComment"># fill in data</span>
+<span id="L31" class="LineNr"> 31 </span>  <span class="PreProc">var</span> len/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy nrows
+<span id="L32" class="LineNr"> 32 </span>  len <span class="SpecialChar">&lt;-</span> multiply ncols
+<span id="L33" class="LineNr"> 33 </span>  <span class="PreProc">var</span> out/<span class="Constant">edi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L34" class="LineNr"> 34 </span>  <span class="PreProc">var</span> data/<span class="Constant">eax</span>: (addr handle array <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> out, data
+<span id="L35" class="LineNr"> 35 </span>  populate data, len
+<span id="L36" class="LineNr"> 36 </span>  <span class="PreProc">var</span> data-addr/<span class="Constant">eax</span>: (addr array <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *data
+<span id="L37" class="LineNr"> 37 </span>  <a href='surface.mu.html#L299'>fill-in</a> data-addr, in
+<span id="L38" class="LineNr"> 38 </span>  <span class="muComment"># fill in screen-nrows, screen-ncols</span>
+<span id="L39" class="LineNr"> 39 </span>  <span class="Delimiter">{</span>
+<span id="L40" class="LineNr"> 40 </span>    <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L41" class="LineNr"> 41 </span>    <span class="PreProc">var</span> _screen-addr/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L42" class="LineNr"> 42 </span>    <span class="PreProc">var</span> screen-addr/<span class="Constant">edi</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> copy _screen-addr
+<span id="L43" class="LineNr"> 43 </span>    <span class="PreProc">var</span> nrows/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L44" class="LineNr"> 44 </span>    <span class="PreProc">var</span> ncols/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L45" class="LineNr"> 45 </span>    nrows, ncols <span class="SpecialChar">&lt;-</span> <a href='../../405screen.mu.html#L60'>screen-size</a> screen-addr
+<span id="L46" class="LineNr"> 46 </span>    <span class="PreProc">var</span> dest/<span class="Constant">edi</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, screen-nrows
+<span id="L47" class="LineNr"> 47 </span>    copy-to *dest, nrows
+<span id="L48" class="LineNr"> 48 </span>    dest <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, screen-ncols
+<span id="L49" class="LineNr"> 49 </span>    copy-to *dest, ncols
+<span id="L50" class="LineNr"> 50 </span>  <span class="Delimiter">}</span>
+<span id="L51" class="LineNr"> 51 </span><span class="Delimiter">}</span>
+<span id="L52" class="LineNr"> 52 </span>
+<span id="L53" class="LineNr"> 53 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L53'>pin-surface-at</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), r: int, c: int <span class="Delimiter">{</span>
+<span id="L54" class="LineNr"> 54 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L55" class="LineNr"> 55 </span>  <span class="PreProc">var</span> dest/<span class="Constant">ecx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-row
+<span id="L56" class="LineNr"> 56 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy r
+<span id="L57" class="LineNr"> 57 </span>  copy-to *dest, tmp
+<span id="L58" class="LineNr"> 58 </span>  dest <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-col
+<span id="L59" class="LineNr"> 59 </span>  tmp <span class="SpecialChar">&lt;-</span> copy c
+<span id="L60" class="LineNr"> 60 </span>  copy-to *dest, tmp
+<span id="L61" class="LineNr"> 61 </span><span class="Delimiter">}</span>
+<span id="L62" class="LineNr"> 62 </span>
+<span id="L63" class="LineNr"> 63 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L63'>pin-surface-to</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), sr: int, sc: int <span class="Delimiter">{</span>
+<span id="L64" class="LineNr"> 64 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L65" class="LineNr"> 65 </span>  <span class="PreProc">var</span> dest/<span class="Constant">ecx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-screen-row
+<span id="L66" class="LineNr"> 66 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy sr
+<span id="L67" class="LineNr"> 67 </span>  copy-to *dest, tmp
+<span id="L68" class="LineNr"> 68 </span>  dest <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-screen-col
+<span id="L69" class="LineNr"> 69 </span>  tmp <span class="SpecialChar">&lt;-</span> copy sc
+<span id="L70" class="LineNr"> 70 </span>  copy-to *dest, tmp
+<span id="L71" class="LineNr"> 71 </span><span class="Delimiter">}</span>
+<span id="L72" class="LineNr"> 72 </span>
+<span id="L73" class="LineNr"> 73 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L73'>render-surface</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="Delimiter">{</span>
+<span id="L74" class="LineNr"> 74 </span><span class="CommentedCode">#?   print-string-to-real-screen &quot;render-surface\n&quot;</span>
+<span id="L75" class="LineNr"> 75 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L76" class="LineNr"> 76 </span>  <span class="muComment"># clear screen</span>
+<span id="L77" class="LineNr"> 77 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L78" class="LineNr"> 78 </span>  <span class="PreProc">var</span> <a href='../../405screen.mu.html#L9'>screen</a>/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L79" class="LineNr"> 79 </span>  <a href='../../405screen.mu.html#L80'>clear-screen</a> <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L80" class="LineNr"> 80 </span>  <span class="muComment">#</span>
+<span id="L81" class="LineNr"> 81 </span>  <span class="PreProc">var</span> nrows/<span class="Constant">edx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, screen-nrows
+<span id="L82" class="LineNr"> 82 </span>  <span class="PreProc">var</span> ncols/<span class="Constant">ebx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, screen-ncols
+<span id="L83" class="LineNr"> 83 </span>  <span class="PreProc">var</span> screen-row/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">1</span>
+<span id="L84" class="LineNr"> 84 </span>  <span class="Delimiter">{</span>
+<span id="L85" class="LineNr"> 85 </span>    compare screen-row, *nrows
+<span id="L86" class="LineNr"> 86 </span>    <span class="PreProc">break-if-&gt;</span>
+<span id="L87" class="LineNr"> 87 </span>    <span class="PreProc">var</span> screen-col/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">1</span>
+<span id="L88" class="LineNr"> 88 </span>    <span class="Delimiter">{</span>
+<span id="L89" class="LineNr"> 89 </span>      compare screen-col, *ncols
+<span id="L90" class="LineNr"> 90 </span>      <span class="PreProc">break-if-&gt;</span>
+<span id="L91" class="LineNr"> 91 </span><span class="CommentedCode">#?       print-string-to-real-screen &quot;X&quot;</span>
+<span id="L92" class="LineNr"> 92 </span>      <a href='surface.mu.html#L102'>print-surface-cell-at</a> self, screen-row, screen-col
+<span id="L93" class="LineNr"> 93 </span>      screen-col <span class="SpecialChar">&lt;-</span> increment
+<span id="L94" class="LineNr"> 94 </span>      <span class="PreProc">loop</span>
+<span id="L95" class="LineNr"> 95 </span>    <span class="Delimiter">}</span>
+<span id="L96" class="LineNr"> 96 </span><span class="CommentedCode">#?     print-string-to-real-screen &quot;\n&quot;</span>
+<span id="L97" class="LineNr"> 97 </span>    screen-row <span class="SpecialChar">&lt;-</span> increment
+<span id="L98" class="LineNr"> 98 </span>    <span class="PreProc">loop</span>
+<span id="L99" class="LineNr"> 99 </span>  <span class="Delimiter">}</span>
+<span id="L100" class="LineNr">100 </span><span class="Delimiter">}</span>
+<span id="L101" class="LineNr">101 </span>
+<span id="L102" class="LineNr">102 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L102'>print-surface-cell-at</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), screen-row: int, screen-col: int <span class="Delimiter">{</span>
+<span id="L103" class="LineNr">103 </span>$print-surface-cell-at:body: <span class="Delimiter">{</span>
+<span id="L104" class="LineNr">104 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L105" class="LineNr">105 </span>  <span class="PreProc">var</span> row/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> <a href='surface.mu.html#L196'>screen-row-to-surface</a> self, screen-row
+<span id="L106" class="LineNr">106 </span>  <span class="PreProc">var</span> col/<span class="Constant">edx</span>: int <span class="SpecialChar">&lt;-</span> <a href='surface.mu.html#L237'>screen-col-to-surface</a> self, screen-col
+<span id="L107" class="LineNr">107 </span>  <span class="PreProc">var</span> data-ah/<span class="Constant">edi</span>: (addr handle array <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, data
+<span id="L108" class="LineNr">108 </span>  <span class="PreProc">var</span> _data-addr/<span class="Constant">eax</span>: (addr array <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *data-ah
+<span id="L109" class="LineNr">109 </span>  <span class="PreProc">var</span> data-addr/<span class="Constant">edi</span>: (addr array <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> copy _data-addr
+<span id="L110" class="LineNr">110 </span>  <span class="PreProc">var</span> idx/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> <a href='surface.mu.html#L169'>surface-screen-cell-index</a> self, row, col
+<span id="L111" class="LineNr">111 </span>  <span class="muComment"># if out of bounds, print ' '</span>
+<span id="L112" class="LineNr">112 </span>  compare idx, <span class="Constant">0</span>
+<span id="L113" class="LineNr">113 </span>  <span class="Delimiter">{</span>
+<span id="L114" class="LineNr">114 </span>    <span class="PreProc">break-if-&gt;=</span>
+<span id="L115" class="LineNr">115 </span>    <span class="PreProc">var</span> space/<span class="Constant">ecx</span>: grapheme <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0x20</span>
+<span id="L116" class="LineNr">116 </span>    <span class="PreProc">var</span> screen-ah/<span class="Constant">edi</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L117" class="LineNr">117 </span>    <span class="PreProc">var</span> <a href='../../405screen.mu.html#L9'>screen</a>/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L118" class="LineNr">118 </span>    <a href='../../405screen.mu.html#L206'>print-grapheme</a> <a href='../../405screen.mu.html#L9'>screen</a>, space
+<span id="L119" class="LineNr">119 </span>    <span class="PreProc">break</span> $print-surface-cell-at:body
+<span id="L120" class="LineNr">120 </span>  <span class="Delimiter">}</span>
+<span id="L121" class="LineNr">121 </span>  <span class="muComment"># otherwise print the appropriate screen-cell</span>
+<span id="L122" class="LineNr">122 </span>  <span class="PreProc">var</span> offset/<span class="Constant">ecx</span>: (offset <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> compute-offset data-addr, idx
+<span id="L123" class="LineNr">123 </span>  <span class="PreProc">var</span> src/<span class="Constant">ecx</span>: (addr <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> index data-addr, offset
+<span id="L124" class="LineNr">124 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">edi</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L125" class="LineNr">125 </span>  <span class="PreProc">var</span> <a href='../../405screen.mu.html#L9'>screen</a>/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L126" class="LineNr">126 </span>  <a href='surface.mu.html#L131'>print-screen-cell</a> <a href='../../405screen.mu.html#L9'>screen</a>, src
+<span id="L127" class="LineNr">127 </span><span class="Delimiter">}</span>
+<span id="L128" class="LineNr">128 </span><span class="Delimiter">}</span>
+<span id="L129" class="LineNr">129 </span>
+<span id="L130" class="LineNr">130 </span><span class="muComment"># print a cell with all its formatting at the cursor location</span>
+<span id="L131" class="LineNr">131 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L131'>print-screen-cell</a></span> <a href='../../405screen.mu.html#L9'>screen</a>: (addr <a href='../../405screen.mu.html#L9'>screen</a>), _cell: (addr <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="Delimiter">{</span>
+<span id="L132" class="LineNr">132 </span>  <span class="PreProc">var</span> cell/<span class="Constant">esi</span>: (addr <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> copy _cell
+<span id="L133" class="LineNr">133 </span>  <a href='../../405screen.mu.html#L496'>reset-formatting</a> <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L134" class="LineNr">134 </span>  <span class="PreProc">var</span> fg/<span class="Constant">eax</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> cell, color
+<span id="L135" class="LineNr">135 </span>  <span class="PreProc">var</span> bg/<span class="Constant">ecx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> cell, background-color
+<span id="L136" class="LineNr">136 </span>  <a href='../../405screen.mu.html#L518'>start-color</a> <a href='../../405screen.mu.html#L9'>screen</a>, *fg, *bg
+<span id="L137" class="LineNr">137 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr boolean) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> cell, bold?
+<span id="L138" class="LineNr">138 </span>  <span class="Delimiter">{</span>
+<span id="L139" class="LineNr">139 </span>    compare *tmp, <span class="Constant">0</span>
+<span id="L140" class="LineNr">140 </span>    <span class="PreProc">break-if-=</span>
+<span id="L141" class="LineNr">141 </span>    <a href='../../405screen.mu.html#L541'>start-bold</a> <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L142" class="LineNr">142 </span>  <span class="Delimiter">}</span>
+<span id="L143" class="LineNr">143 </span>  <span class="Delimiter">{</span>
+<span id="L144" class="LineNr">144 </span>    tmp <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> cell, underline?
+<span id="L145" class="LineNr">145 </span>    compare *tmp, <span class="Constant">0</span>
+<span id="L146" class="LineNr">146 </span>    <span class="PreProc">break-if-=</span>
+<span id="L147" class="LineNr">147 </span>    <a href='../../405screen.mu.html#L560'>start-underline</a> <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L148" class="LineNr">148 </span>  <span class="Delimiter">}</span>
+<span id="L149" class="LineNr">149 </span>  <span class="Delimiter">{</span>
+<span id="L150" class="LineNr">150 </span>    tmp <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> cell, reverse?
+<span id="L151" class="LineNr">151 </span>    compare *tmp, <span class="Constant">0</span>
+<span id="L152" class="LineNr">152 </span>    <span class="PreProc">break-if-=</span>
+<span id="L153" class="LineNr">153 </span>    <a href='../../405screen.mu.html#L579'>start-reverse-video</a> <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L154" class="LineNr">154 </span>  <span class="Delimiter">}</span>
+<span id="L155" class="LineNr">155 </span>  <span class="Delimiter">{</span>
+<span id="L156" class="LineNr">156 </span>    tmp <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> cell, blink?
+<span id="L157" class="LineNr">157 </span>    compare *tmp, <span class="Constant">0</span>
+<span id="L158" class="LineNr">158 </span>    <span class="PreProc">break-if-=</span>
+<span id="L159" class="LineNr">159 </span>    <a href='../../405screen.mu.html#L598'>start-blinking</a> <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L160" class="LineNr">160 </span>  <span class="Delimiter">}</span>
+<span id="L161" class="LineNr">161 </span>  <span class="PreProc">var</span> g/<span class="Constant">eax</span>: (addr grapheme) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> cell, data
+<span id="L162" class="LineNr">162 </span>  <a href='../../405screen.mu.html#L206'>print-grapheme</a> <a href='../../405screen.mu.html#L9'>screen</a>, *g
+<span id="L163" class="LineNr">163 </span><span class="CommentedCode">#?   var g2/eax: grapheme &lt;- copy *g</span>
+<span id="L164" class="LineNr">164 </span><span class="CommentedCode">#?   var g3/eax: int &lt;- copy g2</span>
+<span id="L165" class="LineNr">165 </span><span class="CommentedCode">#?   print-int32-hex-to-real-screen g3</span>
+<span id="L166" class="LineNr">166 </span><span class="CommentedCode">#?   print-string-to-real-screen &quot;\n&quot;</span>
+<span id="L167" class="LineNr">167 </span><span class="Delimiter">}</span>
+<span id="L168" class="LineNr">168 </span>
+<span id="L169" class="LineNr">169 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L169'>surface-screen-cell-index</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), row: int, col: int<span class="PreProc"> -&gt; </span>result/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
+<span id="L170" class="LineNr">170 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L171" class="LineNr">171 </span><span class="CommentedCode">#?   print-int32-hex-to-real-screen row</span>
+<span id="L172" class="LineNr">172 </span><span class="CommentedCode">#?   print-string-to-real-screen &quot;, &quot;</span>
+<span id="L173" class="LineNr">173 </span><span class="CommentedCode">#?   print-int32-hex-to-real-screen col</span>
+<span id="L174" class="LineNr">174 </span><span class="CommentedCode">#?   print-string-to-real-screen &quot;\n&quot;</span>
+<span id="L175" class="LineNr">175 </span>  result <span class="SpecialChar">&lt;-</span> copy <span class="Constant">-1</span>
+<span id="L176" class="LineNr">176 </span>  compare row, <span class="Constant">1</span>
+<span id="L177" class="LineNr">177 </span>  <span class="PreProc">break-if-&lt;</span>
+<span id="L178" class="LineNr">178 </span>  compare col, <span class="Constant">1</span>
+<span id="L179" class="LineNr">179 </span>  <span class="PreProc">break-if-&lt;</span>
+<span id="L180" class="LineNr">180 </span>  <span class="PreProc">var</span> nrows-addr/<span class="Constant">ecx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, nrows
+<span id="L181" class="LineNr">181 </span>  <span class="PreProc">var</span> nrows/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy *nrows-addr
+<span id="L182" class="LineNr">182 </span>  compare row, nrows
+<span id="L183" class="LineNr">183 </span>  <span class="PreProc">break-if-&gt;</span>
+<span id="L184" class="LineNr">184 </span>  <span class="PreProc">var</span> ncols-addr/<span class="Constant">ecx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, ncols
+<span id="L185" class="LineNr">185 </span>  <span class="PreProc">var</span> ncols/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy *ncols-addr
+<span id="L186" class="LineNr">186 </span>  compare col, ncols
+<span id="L187" class="LineNr">187 </span>  <span class="PreProc">break-if-&gt;</span>
+<span id="L188" class="LineNr">188 </span><span class="CommentedCode">#?   print-string-to-real-screen &quot;!\n&quot;</span>
+<span id="L189" class="LineNr">189 </span>  result <span class="SpecialChar">&lt;-</span> copy row
+<span id="L190" class="LineNr">190 </span>  result <span class="SpecialChar">&lt;-</span> subtract <span class="Constant">1</span>
+<span id="L191" class="LineNr">191 </span>  result <span class="SpecialChar">&lt;-</span> multiply ncols
+<span id="L192" class="LineNr">192 </span>  result <span class="SpecialChar">&lt;-</span> add col
+<span id="L193" class="LineNr">193 </span>  result <span class="SpecialChar">&lt;-</span> subtract <span class="Constant">1</span>
+<span id="L194" class="LineNr">194 </span><span class="Delimiter">}</span>
+<span id="L195" class="LineNr">195 </span>
+<span id="L196" class="LineNr">196 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L196'>screen-row-to-surface</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), screen-row: int<span class="PreProc"> -&gt; </span>result/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
+<span id="L197" class="LineNr">197 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L198" class="LineNr">198 </span>  result <span class="SpecialChar">&lt;-</span> copy screen-row
+<span id="L199" class="LineNr">199 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-row
+<span id="L200" class="LineNr">200 </span>  result <span class="SpecialChar">&lt;-</span> add *tmp
+<span id="L201" class="LineNr">201 </span>  tmp <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-screen-row
+<span id="L202" class="LineNr">202 </span>  result <span class="SpecialChar">&lt;-</span> subtract *tmp
+<span id="L203" class="LineNr">203 </span><span class="Delimiter">}</span>
+<span id="L204" class="LineNr">204 </span>
+<span id="L205" class="LineNr">205 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L205'>max</a></span> a: int, b: int<span class="PreProc"> -&gt; </span>result/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
+<span id="L206" class="LineNr">206 </span>$max:body: <span class="Delimiter">{</span>
+<span id="L207" class="LineNr">207 </span>  <span class="PreProc">var</span> a2/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy a
+<span id="L208" class="LineNr">208 </span>  compare a2, b
+<span id="L209" class="LineNr">209 </span>  <span class="Delimiter">{</span>
+<span id="L210" class="LineNr">210 </span>    <span class="PreProc">break-if-&gt;</span>
+<span id="L211" class="LineNr">211 </span>    result <span class="SpecialChar">&lt;-</span> copy b
+<span id="L212" class="LineNr">212 </span>    <span class="PreProc">break</span> $max:body
+<span id="L213" class="LineNr">213 </span>  <span class="Delimiter">}</span>
+<span id="L214" class="LineNr">214 </span>  <span class="Delimiter">{</span>
+<span id="L215" class="LineNr">215 </span>    <span class="PreProc">break-if-&lt;=</span>
+<span id="L216" class="LineNr">216 </span>    result <span class="SpecialChar">&lt;-</span> copy a2
+<span id="L217" class="LineNr">217 </span>  <span class="Delimiter">}</span>
+<span id="L218" class="LineNr">218 </span><span class="Delimiter">}</span>
+<span id="L219" class="LineNr">219 </span><span class="Delimiter">}</span>
+<span id="L220" class="LineNr">220 </span>
+<span id="L221" class="LineNr">221 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L221'>min</a></span> a: int, b: int<span class="PreProc"> -&gt; </span>result/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
+<span id="L222" class="LineNr">222 </span>$min:body: <span class="Delimiter">{</span>
+<span id="L223" class="LineNr">223 </span>  <span class="PreProc">var</span> a2/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy a
+<span id="L224" class="LineNr">224 </span>  compare a2, b
+<span id="L225" class="LineNr">225 </span>  <span class="Delimiter">{</span>
+<span id="L226" class="LineNr">226 </span>    <span class="PreProc">break-if-&gt;</span>
+<span id="L227" class="LineNr">227 </span>    result <span class="SpecialChar">&lt;-</span> copy a2
+<span id="L228" class="LineNr">228 </span>    <span class="PreProc">break</span> $min:body
+<span id="L229" class="LineNr">229 </span>  <span class="Delimiter">}</span>
+<span id="L230" class="LineNr">230 </span>  <span class="Delimiter">{</span>
+<span id="L231" class="LineNr">231 </span>    <span class="PreProc">break-if-&lt;=</span>
+<span id="L232" class="LineNr">232 </span>    result <span class="SpecialChar">&lt;-</span> copy b
+<span id="L233" class="LineNr">233 </span>  <span class="Delimiter">}</span>
+<span id="L234" class="LineNr">234 </span><span class="Delimiter">}</span>
+<span id="L235" class="LineNr">235 </span><span class="Delimiter">}</span>
+<span id="L236" class="LineNr">236 </span>
+<span id="L237" class="LineNr">237 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L237'>screen-col-to-surface</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), screen-col: int<span class="PreProc"> -&gt; </span>result/<span class="Constant">edx</span>: int <span class="Delimiter">{</span>
+<span id="L238" class="LineNr">238 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L239" class="LineNr">239 </span>  result <span class="SpecialChar">&lt;-</span> copy screen-col
+<span id="L240" class="LineNr">240 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-col
+<span id="L241" class="LineNr">241 </span>  result <span class="SpecialChar">&lt;-</span> add *tmp
+<span id="L242" class="LineNr">242 </span>  tmp <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-screen-col
+<span id="L243" class="LineNr">243 </span>  result <span class="SpecialChar">&lt;-</span> subtract *tmp
+<span id="L244" class="LineNr">244 </span><span class="Delimiter">}</span>
+<span id="L245" class="LineNr">245 </span>
+<span id="L246" class="LineNr">246 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L246'>surface-row-to-screen</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), row: int<span class="PreProc"> -&gt; </span>result/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
+<span id="L247" class="LineNr">247 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L248" class="LineNr">248 </span>  result <span class="SpecialChar">&lt;-</span> copy row
+<span id="L249" class="LineNr">249 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-screen-row
+<span id="L250" class="LineNr">250 </span>  result <span class="SpecialChar">&lt;-</span> add *tmp
+<span id="L251" class="LineNr">251 </span>  tmp <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-row
+<span id="L252" class="LineNr">252 </span>  result <span class="SpecialChar">&lt;-</span> subtract *tmp
+<span id="L253" class="LineNr">253 </span><span class="Delimiter">}</span>
+<span id="L254" class="LineNr">254 </span>
+<span id="L255" class="LineNr">255 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L255'>surface-col-to-screen</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), col: int<span class="PreProc"> -&gt; </span>result/<span class="Constant">edx</span>: int <span class="Delimiter">{</span>
+<span id="L256" class="LineNr">256 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L257" class="LineNr">257 </span>  result <span class="SpecialChar">&lt;-</span> copy col
+<span id="L258" class="LineNr">258 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-screen-col
+<span id="L259" class="LineNr">259 </span>  result <span class="SpecialChar">&lt;-</span> add *tmp
+<span id="L260" class="LineNr">260 </span>  tmp <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, pin-col
+<span id="L261" class="LineNr">261 </span>  result <span class="SpecialChar">&lt;-</span> subtract *tmp
+<span id="L262" class="LineNr">262 </span><span class="Delimiter">}</span>
+<span id="L263" class="LineNr">263 </span>
+<span id="L264" class="LineNr">264 </span><span class="muComment"># assumes last line doesn't end in '\n'</span>
+<span id="L265" class="LineNr">265 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L265'>num-lines</a></span> in: (addr array byte)<span class="PreProc"> -&gt; </span>result/<span class="Constant">ecx</span>: int <span class="Delimiter">{</span>
+<span id="L266" class="LineNr">266 </span>  <span class="PreProc">var</span> s: (stream byte <span class="Constant">0x100</span>)
+<span id="L267" class="LineNr">267 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address s
+<span id="L268" class="LineNr">268 </span>  <a href='../../108write.subx.html#L24'>write</a> s-addr, in
+<span id="L269" class="LineNr">269 </span>  result <span class="SpecialChar">&lt;-</span> copy <span class="Constant">1</span>
+<span id="L270" class="LineNr">270 </span>  <span class="Delimiter">{</span>
+<span id="L271" class="LineNr">271 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="SpecialChar">&lt;-</span> <a href='../../309stream.subx.html#L6'>stream-empty?</a> s-addr
+<span id="L272" class="LineNr">272 </span>    compare done?, <span class="Constant">0</span>  <span class="muComment"># false</span>
+<span id="L273" class="LineNr">273 </span>    <span class="PreProc">break-if-!=</span>
+<span id="L274" class="LineNr">274 </span>    <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='../../403unicode.mu.html#L160'>read-grapheme</a> s-addr
+<span id="L275" class="LineNr">275 </span>    compare g, <span class="Constant">0xa</span>  <span class="muComment"># newline</span>
+<span id="L276" class="LineNr">276 </span>    <span class="PreProc">loop-if-!=</span>
+<span id="L277" class="LineNr">277 </span>    result <span class="SpecialChar">&lt;-</span> increment
+<span id="L278" class="LineNr">278 </span>    <span class="PreProc">loop</span>
+<span id="L279" class="LineNr">279 </span>  <span class="Delimiter">}</span>
+<span id="L280" class="LineNr">280 </span><span class="Delimiter">}</span>
+<span id="L281" class="LineNr">281 </span>
+<span id="L282" class="LineNr">282 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L282'>first-line-length</a></span> in: (addr array byte)<span class="PreProc"> -&gt; </span>result/<span class="Constant">edx</span>: int <span class="Delimiter">{</span>
+<span id="L283" class="LineNr">283 </span>  <span class="PreProc">var</span> s: (stream byte <span class="Constant">0x100</span>)
+<span id="L284" class="LineNr">284 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address s
+<span id="L285" class="LineNr">285 </span>  <a href='../../108write.subx.html#L24'>write</a> s-addr, in
+<span id="L286" class="LineNr">286 </span>  result <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L287" class="LineNr">287 </span>  <span class="Delimiter">{</span>
+<span id="L288" class="LineNr">288 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="SpecialChar">&lt;-</span> <a href='../../309stream.subx.html#L6'>stream-empty?</a> s-addr
+<span id="L289" class="LineNr">289 </span>    compare done?, <span class="Constant">0</span>  <span class="muComment"># false</span>
+<span id="L290" class="LineNr">290 </span>    <span class="PreProc">break-if-!=</span>
+<span id="L291" class="LineNr">291 </span>    <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='../../403unicode.mu.html#L160'>read-grapheme</a> s-addr
+<span id="L292" class="LineNr">292 </span>    compare g, <span class="Constant">0xa</span>  <span class="muComment"># newline</span>
+<span id="L293" class="LineNr">293 </span>    <span class="PreProc">break-if-=</span>
+<span id="L294" class="LineNr">294 </span>    result <span class="SpecialChar">&lt;-</span> increment
+<span id="L295" class="LineNr">295 </span>    <span class="PreProc">loop</span>
+<span id="L296" class="LineNr">296 </span>  <span class="Delimiter">}</span>
+<span id="L297" class="LineNr">297 </span><span class="Delimiter">}</span>
+<span id="L298" class="LineNr">298 </span>
+<span id="L299" class="LineNr">299 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L299'>fill-in</a></span> _out: (addr array <a href='../../405screen.mu.html#L20'>screen-cell</a>), in: (addr array byte) <span class="Delimiter">{</span>
+<span id="L300" class="LineNr">300 </span>  <span class="PreProc">var</span> s: (stream byte <span class="Constant">0x100</span>)
+<span id="L301" class="LineNr">301 </span>  <span class="PreProc">var</span> out/<span class="Constant">edi</span>: (addr array <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> copy _out
+<span id="L302" class="LineNr">302 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr stream byte) <span class="SpecialChar">&lt;-</span> address s
+<span id="L303" class="LineNr">303 </span>  <a href='../../108write.subx.html#L24'>write</a> s-addr, in
+<span id="L304" class="LineNr">304 </span>  <span class="PreProc">var</span> idx/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
+<span id="L305" class="LineNr">305 </span>  <span class="Delimiter">{</span>
+<span id="L306" class="LineNr">306 </span>    <span class="PreProc">var</span> done?/<span class="Constant">eax</span>: boolean <span class="SpecialChar">&lt;-</span> <a href='../../309stream.subx.html#L6'>stream-empty?</a> s-addr
+<span id="L307" class="LineNr">307 </span>    compare done?, <span class="Constant">0</span>  <span class="muComment"># false</span>
+<span id="L308" class="LineNr">308 </span>    <span class="PreProc">break-if-!=</span>
+<span id="L309" class="LineNr">309 </span>    <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar">&lt;-</span> <a href='../../403unicode.mu.html#L160'>read-grapheme</a> s-addr
+<span id="L310" class="LineNr">310 </span>    compare g, <span class="Constant">0xa</span>  <span class="muComment"># newline</span>
+<span id="L311" class="LineNr">311 </span>    <span class="PreProc">loop-if-=</span>
+<span id="L312" class="LineNr">312 </span>    <span class="PreProc">var</span> offset/<span class="Constant">edx</span>: (offset <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> compute-offset out, idx
+<span id="L313" class="LineNr">313 </span>    <span class="PreProc">var</span> dest/<span class="Constant">edx</span>: (addr <a href='../../405screen.mu.html#L20'>screen-cell</a>) <span class="SpecialChar">&lt;-</span> index out, offset
+<span id="L314" class="LineNr">314 </span>    <span class="PreProc">var</span> dest2/<span class="Constant">edx</span>: (addr grapheme) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> dest, data
+<span id="L315" class="LineNr">315 </span>    copy-to *dest2, g
+<span id="L316" class="LineNr">316 </span>    idx <span class="SpecialChar">&lt;-</span> increment
+<span id="L317" class="LineNr">317 </span>    <span class="PreProc">loop</span>
+<span id="L318" class="LineNr">318 </span>  <span class="Delimiter">}</span>
+<span id="L319" class="LineNr">319 </span><span class="Delimiter">}</span>
+<span id="L320" class="LineNr">320 </span>
+<span id="L321" class="LineNr">321 </span><span class="muComment"># pin (1, 1) to (1, 1) on screen</span>
+<span id="L322" class="LineNr">322 </span><span class="PreProc">fn</span> <span class="muTest"><a href='surface.mu.html#L322'>test-surface-pin-at-origin</a></span> <span class="Delimiter">{</span>
+<span id="L323" class="LineNr">323 </span>  <span class="PreProc">var</span> s: <a href='surface.mu.html#L7'>surface</a>
+<span id="L324" class="LineNr">324 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> address s
+<span id="L325" class="LineNr">325 </span>  <span class="muComment"># surface contents are a fixed grid with 8 rows and 6 columns</span>
+<span id="L326" class="LineNr">326 </span>  <span class="muComment"># (strip vowels second time around to break vertical alignment of letters)</span>
+<span id="L327" class="LineNr">327 </span>  <a href='surface.mu.html#L408'>initialize-surface-with-fake-screen</a> s-addr, <span class="Constant">3</span>, <span class="Constant">4</span>, <span class="Constant">&quot;abcdef\nghijkl\nmnopqr\nstuvwx\nyzabcd\nfghjkl\nmnpqrs\ntvwxyz&quot;</span>
+<span id="L328" class="LineNr">328 </span>  <a href='surface.mu.html#L53'>pin-surface-at</a> s-addr, <span class="Constant">1</span>, <span class="Constant">1</span>  <span class="muComment"># surface row and column</span>
+<span id="L329" class="LineNr">329 </span>  <a href='surface.mu.html#L63'>pin-surface-to</a> s-addr, <span class="Constant">1</span>, <span class="Constant">1</span>  <span class="muComment"># screen row and column</span>
+<span id="L330" class="LineNr">330 </span>  <a href='surface.mu.html#L73'>render-surface</a> s-addr
+<span id="L331" class="LineNr">331 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> s-addr, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L332" class="LineNr">332 </span>  <span class="PreProc">var</span> screen-addr/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L333" class="LineNr">333 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">1</span>, <span class="Constant">&quot;abcd&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-at-origin&quot;</span>
+<span id="L334" class="LineNr">334 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">2</span>, <span class="Constant">&quot;ghij&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-at-origin&quot;</span>
+<span id="L335" class="LineNr">335 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">3</span>, <span class="Constant">&quot;mnop&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-at-origin&quot;</span>
+<span id="L336" class="LineNr">336 </span><span class="Delimiter">}</span>
+<span id="L337" class="LineNr">337 </span>
+<span id="L338" class="LineNr">338 </span><span class="muComment"># pin (1, 1) to (2, 1) on screen; screen goes past edge of the universe</span>
+<span id="L339" class="LineNr">339 </span><span class="PreProc">fn</span> <span class="muTest"><a href='surface.mu.html#L339'>test-surface-pin-2</a></span> <span class="Delimiter">{</span>
+<span id="L340" class="LineNr">340 </span>  <span class="PreProc">var</span> s: <a href='surface.mu.html#L7'>surface</a>
+<span id="L341" class="LineNr">341 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> address s
+<span id="L342" class="LineNr">342 </span>  <span class="muComment"># surface contents are a fixed grid with 8 rows and 6 columns</span>
+<span id="L343" class="LineNr">343 </span>  <span class="muComment"># (strip vowels second time around to break vertical alignment of letters)</span>
+<span id="L344" class="LineNr">344 </span>  <a href='surface.mu.html#L408'>initialize-surface-with-fake-screen</a> s-addr, <span class="Constant">3</span>, <span class="Constant">4</span>, <span class="Constant">&quot;abcdef\nghijkl\nmnopqr\nstuvwx\nyzabcd\nfghjkl\nmnpqrs\ntvwxyz&quot;</span>
+<span id="L345" class="LineNr">345 </span>  <a href='surface.mu.html#L53'>pin-surface-at</a> s-addr, <span class="Constant">1</span>, <span class="Constant">1</span>  <span class="muComment"># surface row and column</span>
+<span id="L346" class="LineNr">346 </span>  <a href='surface.mu.html#L63'>pin-surface-to</a> s-addr, <span class="Constant">2</span>, <span class="Constant">1</span>  <span class="muComment"># screen row and column</span>
+<span id="L347" class="LineNr">347 </span>  <a href='surface.mu.html#L73'>render-surface</a> s-addr
+<span id="L348" class="LineNr">348 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> s-addr, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L349" class="LineNr">349 </span>  <span class="PreProc">var</span> screen-addr/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L350" class="LineNr">350 </span>  <span class="muComment"># surface edge reached (should seldom happen in the app)</span>
+<span id="L351" class="LineNr">351 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">1</span>, <span class="Constant">&quot;    &quot;</span>, <span class="Constant">&quot;F - test-surface-pin-2&quot;</span>
+<span id="L352" class="LineNr">352 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">2</span>, <span class="Constant">&quot;abcd&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-2&quot;</span>
+<span id="L353" class="LineNr">353 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">3</span>, <span class="Constant">&quot;ghij&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-2&quot;</span>
+<span id="L354" class="LineNr">354 </span><span class="Delimiter">}</span>
+<span id="L355" class="LineNr">355 </span>
+<span id="L356" class="LineNr">356 </span><span class="muComment"># pin (2, 1) to (1, 1) on screen</span>
+<span id="L357" class="LineNr">357 </span><span class="PreProc">fn</span> <span class="muTest"><a href='surface.mu.html#L357'>test-surface-pin-3</a></span> <span class="Delimiter">{</span>
+<span id="L358" class="LineNr">358 </span>  <span class="PreProc">var</span> s: <a href='surface.mu.html#L7'>surface</a>
+<span id="L359" class="LineNr">359 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> address s
+<span id="L360" class="LineNr">360 </span>  <span class="muComment"># surface contents are a fixed grid with 8 rows and 6 columns</span>
+<span id="L361" class="LineNr">361 </span>  <span class="muComment"># (strip vowels second time around to break vertical alignment of letters)</span>
+<span id="L362" class="LineNr">362 </span>  <a href='surface.mu.html#L408'>initialize-surface-with-fake-screen</a> s-addr, <span class="Constant">3</span>, <span class="Constant">4</span>, <span class="Constant">&quot;abcdef\nghijkl\nmnopqr\nstuvwx\nyzabcd\nfghjkl\nmnpqrs\ntvwxyz&quot;</span>
+<span id="L363" class="LineNr">363 </span>  <a href='surface.mu.html#L53'>pin-surface-at</a> s-addr, <span class="Constant">2</span>, <span class="Constant">1</span>  <span class="muComment"># surface row and column</span>
+<span id="L364" class="LineNr">364 </span>  <a href='surface.mu.html#L63'>pin-surface-to</a> s-addr, <span class="Constant">1</span>, <span class="Constant">1</span>  <span class="muComment"># screen row and column</span>
+<span id="L365" class="LineNr">365 </span>  <a href='surface.mu.html#L73'>render-surface</a> s-addr
+<span id="L366" class="LineNr">366 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> s-addr, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L367" class="LineNr">367 </span>  <span class="PreProc">var</span> screen-addr/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L368" class="LineNr">368 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">1</span>, <span class="Constant">&quot;ghij&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-3&quot;</span>
+<span id="L369" class="LineNr">369 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">2</span>, <span class="Constant">&quot;mnop&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-3&quot;</span>
+<span id="L370" class="LineNr">370 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">3</span>, <span class="Constant">&quot;stuv&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-3&quot;</span>
+<span id="L371" class="LineNr">371 </span><span class="Delimiter">}</span>
+<span id="L372" class="LineNr">372 </span>
+<span id="L373" class="LineNr">373 </span><span class="muComment"># pin (1, 1) to (1, 2) on screen; screen goes past edge of the universe</span>
+<span id="L374" class="LineNr">374 </span><span class="PreProc">fn</span> <span class="muTest"><a href='surface.mu.html#L374'>test-surface-pin-4</a></span> <span class="Delimiter">{</span>
+<span id="L375" class="LineNr">375 </span>  <span class="PreProc">var</span> s: <a href='surface.mu.html#L7'>surface</a>
+<span id="L376" class="LineNr">376 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> address s
+<span id="L377" class="LineNr">377 </span>  <span class="muComment"># surface contents are a fixed grid with 8 rows and 6 columns</span>
+<span id="L378" class="LineNr">378 </span>  <span class="muComment"># (strip vowels second time around to break vertical alignment of letters)</span>
+<span id="L379" class="LineNr">379 </span>  <a href='surface.mu.html#L408'>initialize-surface-with-fake-screen</a> s-addr, <span class="Constant">3</span>, <span class="Constant">4</span>, <span class="Constant">&quot;abcdef\nghijkl\nmnopqr\nstuvwx\nyzabcd\nfghjkl\nmnpqrs\ntvwxyz&quot;</span>
+<span id="L380" class="LineNr">380 </span>  <a href='surface.mu.html#L53'>pin-surface-at</a> s-addr, <span class="Constant">1</span>, <span class="Constant">1</span>  <span class="muComment"># surface row and column</span>
+<span id="L381" class="LineNr">381 </span>  <a href='surface.mu.html#L63'>pin-surface-to</a> s-addr, <span class="Constant">1</span>, <span class="Constant">2</span>  <span class="muComment"># screen row and column</span>
+<span id="L382" class="LineNr">382 </span>  <a href='surface.mu.html#L73'>render-surface</a> s-addr
+<span id="L383" class="LineNr">383 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> s-addr, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L384" class="LineNr">384 </span>  <span class="PreProc">var</span> screen-addr/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L385" class="LineNr">385 </span>  <span class="muComment"># surface edge reached (should seldom happen in the app)</span>
+<span id="L386" class="LineNr">386 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">1</span>, <span class="Constant">&quot; abc&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-4&quot;</span>
+<span id="L387" class="LineNr">387 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">2</span>, <span class="Constant">&quot; ghi&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-4&quot;</span>
+<span id="L388" class="LineNr">388 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">3</span>, <span class="Constant">&quot; mno&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-4&quot;</span>
+<span id="L389" class="LineNr">389 </span><span class="Delimiter">}</span>
+<span id="L390" class="LineNr">390 </span>
+<span id="L391" class="LineNr">391 </span><span class="muComment"># pin (1, 2) to (1, 1) on screen</span>
+<span id="L392" class="LineNr">392 </span><span class="PreProc">fn</span> <span class="muTest"><a href='surface.mu.html#L392'>test-surface-pin-5</a></span> <span class="Delimiter">{</span>
+<span id="L393" class="LineNr">393 </span>  <span class="PreProc">var</span> s: <a href='surface.mu.html#L7'>surface</a>
+<span id="L394" class="LineNr">394 </span>  <span class="PreProc">var</span> s-addr/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> address s
+<span id="L395" class="LineNr">395 </span>  <span class="muComment"># surface contents are a fixed grid with 8 rows and 6 columns</span>
+<span id="L396" class="LineNr">396 </span>  <span class="muComment"># (strip vowels second time around to break vertical alignment of letters)</span>
+<span id="L397" class="LineNr">397 </span>  <a href='surface.mu.html#L408'>initialize-surface-with-fake-screen</a> s-addr, <span class="Constant">3</span>, <span class="Constant">4</span>, <span class="Constant">&quot;abcdef\nghijkl\nmnopqr\nstuvwx\nyzabcd\nfghjkl\nmnpqrs\ntvwxyz&quot;</span>
+<span id="L398" class="LineNr">398 </span>  <a href='surface.mu.html#L53'>pin-surface-at</a> s-addr, <span class="Constant">1</span>, <span class="Constant">2</span>  <span class="muComment"># surface row and column</span>
+<span id="L399" class="LineNr">399 </span>  <a href='surface.mu.html#L63'>pin-surface-to</a> s-addr, <span class="Constant">1</span>, <span class="Constant">1</span>  <span class="muComment"># screen row and column</span>
+<span id="L400" class="LineNr">400 </span>  <a href='surface.mu.html#L73'>render-surface</a> s-addr
+<span id="L401" class="LineNr">401 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> s-addr, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L402" class="LineNr">402 </span>  <span class="PreProc">var</span> screen-addr/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L403" class="LineNr">403 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">1</span>, <span class="Constant">&quot;bcde&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-5&quot;</span>
+<span id="L404" class="LineNr">404 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">2</span>, <span class="Constant">&quot;hijk&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-5&quot;</span>
+<span id="L405" class="LineNr">405 </span>  <a href='../../405screen.mu.html#L657'>check-screen-row</a> screen-addr, <span class="Constant">3</span>, <span class="Constant">&quot;nopq&quot;</span>, <span class="Constant">&quot;F - test-surface-pin-5&quot;</span>
+<span id="L406" class="LineNr">406 </span><span class="Delimiter">}</span>
+<span id="L407" class="LineNr">407 </span>
+<span id="L408" class="LineNr">408 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='surface.mu.html#L408'>initialize-surface-with-fake-screen</a></span> _self: (addr <a href='surface.mu.html#L7'>surface</a>), nrows: int, ncols: int, in: (addr array byte) <span class="Delimiter">{</span>
+<span id="L409" class="LineNr">409 </span>  <span class="PreProc">var</span> self/<span class="Constant">esi</span>: (addr <a href='surface.mu.html#L7'>surface</a>) <span class="SpecialChar">&lt;-</span> copy _self
+<span id="L410" class="LineNr">410 </span>  <span class="muComment"># fill in screen</span>
+<span id="L411" class="LineNr">411 </span>  <span class="PreProc">var</span> screen-ah/<span class="Constant">eax</span>: (addr handle <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../131table.subx.html#L26'>get</a> self, <a href='../../405screen.mu.html#L9'>screen</a>
+<span id="L412" class="LineNr">412 </span>  <a href='../../120allocate.subx.html#L66'>allocate</a> screen-ah
+<span id="L413" class="LineNr">413 </span>  <span class="PreProc">var</span> screen-addr/<span class="Constant">eax</span>: (addr <a href='../../405screen.mu.html#L9'>screen</a>) <span class="SpecialChar">&lt;-</span> <a href='../../120allocate.subx.html#L256'>lookup</a> *screen-ah
+<span id="L414" class="LineNr">414 </span>  <a href='../../405screen.mu.html#L30'>initialize-screen</a> screen-addr, nrows, ncols
+<span id="L415" class="LineNr">415 </span>  <span class="muComment"># fill in everything else</span>
+<span id="L416" class="LineNr">416 </span>  <a href='surface.mu.html#L21'>initialize-surface-with</a> self, in
+<span id="L417" class="LineNr">417 </span><span class="Delimiter">}</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->