html/apps/ex6.mu.html


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<title>Mu - apps/ex6.mu</title>
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<a href='https://github.com/akkartik/mu/blob/main/apps/ex6.mu'>https://github.com/akkartik/mu/blob/main/apps/ex6.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muComment"># Drawing ASCII text incrementally.</span>
<span id="L2" class="LineNr"> 2 </span><span class="muComment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="muComment"># To build a disk image:</span>
<span id="L4" class="LineNr"> 4 </span><span class="muComment">#   ./translate apps/ex6.mu        # emits code.img</span>
<span id="L5" class="LineNr"> 5 </span><span class="muComment"># To run:</span>
<span id="L6" class="LineNr"> 6 </span><span class="muComment">#   qemu-system-i386 code.img</span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment">#</span>
<span id="L8" class="LineNr"> 8 </span><span class="muComment"># Expected output: a box and text that doesn't overflow it</span>
<span id="L9" class="LineNr"> 9 </span>
<span id="L10" class="LineNr">10 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='ex6.mu.html#L10'>main</a></span> <a href='../500fake-screen.mu.html#L16'>screen</a>: (addr <a href='../500fake-screen.mu.html#L16'>screen</a>), keyboard: (addr keyboard), data-disk: (addr disk) <span class="Delimiter">{</span>
<span id="L11" class="LineNr">11 </span>  <span class="muComment"># drawing text within a bounding box</span>
<span id="L12" class="LineNr">12 </span>  <a href='../503manhattan-line.mu.html#L1'>draw-box-on-real-screen</a> <span class="Constant">0xf</span>, <span class="Constant">0x1f</span>, <span class="Constant">0x79</span>, <span class="Constant">0x51</span>, <span class="Constant">0x4</span>
<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> x/eax: int <span class="Special">&lt;-</span> copy <span class="Constant">0x20</span>
<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> y/<span class="muRegEcx">ecx</span>: int <span class="Special">&lt;-</span> copy <span class="Constant">0x20</span>
<span id="L15" class="LineNr">15 </span>  x, y <span class="Special">&lt;-</span> <a href='../501draw-text.mu.html#L181'>draw-text-wrapping-right-then-down</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;hello &quot;</span>,     <span class="Constant">0x10</span>/xmin, <span class="Constant">0x20</span>/ymin, <span class="Constant">0x78</span>/xmax, <span class="Constant">0x50</span>/ymax, x, y, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L16" class="LineNr">16 </span>  x, y <span class="Special">&lt;-</span> <a href='../501draw-text.mu.html#L181'>draw-text-wrapping-right-then-down</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;from &quot;</span>,      <span class="Constant">0x10</span>/xmin, <span class="Constant">0x20</span>/ymin, <span class="Constant">0x78</span>/xmax, <span class="Constant">0x50</span>/ymax, x, y, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L17" class="LineNr">17 </span>  x, y <span class="Special">&lt;-</span> <a href='../501draw-text.mu.html#L181'>draw-text-wrapping-right-then-down</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;baremetal &quot;</span>, <span class="Constant">0x10</span>/xmin, <span class="Constant">0x20</span>/ymin, <span class="Constant">0x78</span>/xmax, <span class="Constant">0x50</span>/ymax, x, y, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L18" class="LineNr">18 </span>  x, y <span class="Special">&lt;-</span> <a href='../501draw-text.mu.html#L181'>draw-text-wrapping-right-then-down</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;Mu!&quot;</span>,        <span class="Constant">0x10</span>/xmin, <span class="Constant">0x20</span>/ymin, <span class="Constant">0x78</span>/xmax, <span class="Constant">0x50</span>/ymax, x, y, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L19" class="LineNr">19 </span>
<span id="L20" class="LineNr">20 </span>  <span class="muComment"># drawing at the cursor in multiple directions</span>
<span id="L21" class="LineNr">21 </span>  <a href='../501draw-text.mu.html#L552'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;abc&quot;</span>, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L22" class="LineNr">22 </span>  <a href='../501draw-text.mu.html#L332'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;def&quot;</span>, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L23" class="LineNr">23 </span>
<span id="L24" class="LineNr">24 </span>  <span class="muComment"># test drawing near the edge</span>
<span id="L25" class="LineNr">25 </span>  x <span class="Special">&lt;-</span> <a href='../501draw-text.mu.html#L106'>draw-text-rightward</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;R&quot;</span>, <span class="Constant">0x7f</span>/x, <span class="Constant">0x80</span>/xmax=screen-width, <span class="Constant">0x18</span>/y, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L26" class="LineNr">26 </span>  <a href='../501draw-text.mu.html#L332'>draw-text-wrapping-right-then-down-from-cursor-over-full-screen</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;wrapped from R&quot;</span>, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L27" class="LineNr">27 </span>
<span id="L28" class="LineNr">28 </span>  x <span class="Special">&lt;-</span> <a href='../501draw-text.mu.html#L454'>draw-text-downward</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;D&quot;</span>, <span class="Constant">0x20</span>/x, <span class="Constant">0x2f</span>/y, <span class="Constant">0x30</span>/ymax=screen-height, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L29" class="LineNr">29 </span>  <a href='../501draw-text.mu.html#L552'>draw-text-wrapping-down-then-right-from-cursor-over-full-screen</a> <a href='../500fake-screen.mu.html#L16'>screen</a>, <span class="Constant">&quot;wrapped from D&quot;</span>, <span class="Constant">0xa</span>/fg, <span class="Constant">0</span>/bg
<span id="L30" class="LineNr">30 </span><span class="Delimiter">}</span>
</pre>
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