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    Contents of /trunk/xorg-server/patches/xorg-server-1.17.1-mi-partial-pie-slice-filled-arcs-may-need-more-space.patch

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    Mon Jun 15 12:22:48 2015 UTC (8 years, 11 months ago) by niro
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    -serveral upstream patches
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    51 <div class='path'>path: <a href='/svntogit/packages.git/tree/?h=packages/xorg-server'>root</a>/<a href='/svntogit/packages.git/tree/trunk?h=packages/xorg-server'>trunk</a>/<a href='/svntogit/packages.git/tree/trunk/0001-mi-Partial-pie-slice-filled-arcs-may-need-more-space.patch?h=packages/xorg-server'>0001-mi-Partial-pie-slice-filled-arcs-may-need-more-space.patch</a></div><div class='content'>blob: 668ae21ba31bd4279d05cd762c43737737e8109d (<a href='/svntogit/packages.git/plain/trunk/0001-mi-Partial-pie-slice-filled-arcs-may-need-more-space.patch?h=packages/xorg-server'>plain</a>)
    52 <table summary='blob content' class='blob'>
    53 <tr><td class='linenumbers'><pre><a id='n1' href='#n1'>1</a>
    54 <a id='n2' href='#n2'>2</a>
    55 <a id='n3' href='#n3'>3</a>
    56 <a id='n4' href='#n4'>4</a>
    57 <a id='n5' href='#n5'>5</a>
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    75 <a id='n23' href='#n23'>23</a>
    76 <a id='n24' href='#n24'>24</a>
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    80 <a id='n28' href='#n28'>28</a>
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    85 <a id='n33' href='#n33'>33</a>
    86 <a id='n34' href='#n34'>34</a>
    87 <a id='n35' href='#n35'>35</a>
    88 <a id='n36' href='#n36'>36</a>
    89 <a id='n37' href='#n37'>37</a>
    90 <a id='n38' href='#n38'>38</a>
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    92 <a id='n40' href='#n40'>40</a>
    93 <a id='n41' href='#n41'>41</a>
    94 <a id='n42' href='#n42'>42</a>
    95 </pre></td>
    96 <td class='lines'><pre><code>From 41932dfbc841a1adc6512d41085ea3f8ebecb42c Mon Sep 17 00:00:00 2001
    97 From: Keith Packard &lt;keithp&#64;keithp.com&gt;
    98 Date: Wed, 8 Apr 2015 07:45:28 -0700
    99 Subject: [PATCH] mi: Partial pie-slice filled arcs may need more space for
    100 spans
    101
    102 The mi filled arc code estimates that a filled arc will produce no
    103 more spans than the arc is tall. This is true for most arcs except
    104 for pie-slice arcs strictly between 180 and 360 degrees where the missing
    105 portion of the arc faces up or down such that we get two spans on some
    106 scanlines.
    107
    108 For those, we need to reserve room for another height/2 spans. This
    109 patch just does it for all partial pie-sliced arcs to make the test
    110 easier to understand; it's just over-allocating a bit of memory, so
    111 that's safe.
    112
    113 Signed-off-by: Keith Packard &lt;keithp&#64;keithp.com&gt;
    114 Reviewed-by: Adam Jackson &lt;ajax&#64;redhat.com&gt;
    115 <span class="hl kwb">---</span>
    116 mi/mifillarc.c | 5 +++++
    117 1 file changed, 5 insertions(+)
    118
    119 diff --git a/mi/mifillarc.c b/mi/mifillarc.c
    120 index 246d70f..888519e 100644
    121 <span class="hl kwb">--- a/mi/mifillarc.c</span>
    122 <span class="hl kwa">+++ b/mi/mifillarc.c</span>
    123 &#64;&#64; -660,6 +660,11 &#64;&#64; miPolyFillArc(DrawablePtr pDraw, GCPtr pGC, int narcs_all, xArc * parcs)
    124 if (narcs &amp;&amp; nspans + arc-&gt;height &gt; MAX_SPANS_PER_LOOP)
    125 break;
    126 nspans += arc-&gt;height;
    127 <span class="hl kwa">+</span>
    128 <span class="hl kwa">+ /* A pie-slice arc may add another pile of spans */</span>
    129 <span class="hl kwa">+ if (pGC-&gt;arcMode == ArcPieSlice &amp;&amp;</span>
    130 <span class="hl kwa">+ (-FULLCIRCLE &lt; arc-&gt;angle2 &amp;&amp; arc-&gt;angle2 &lt; FULLCIRCLE))</span>
    131 <span class="hl kwa">+ nspans += (arc-&gt;height + 1) &gt;&gt; 1;</span>
    132 }
    133
    134 pts = points = malloc (sizeof (DDXPointRec) * nspans +
    135 <span class="hl kwb">-- </span>
    136 2.3.5
    137
    138 </code></pre></td></tr></table>
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