Keep points on edges crossing w=0 under kInfiniteCoordinate.

This adds half of std::numeric_limits<float>::epsilon() (FLT_EPSILON), which is the smallest representable difference for a float at 1.0, so that the code to shift t away from the point where w=0 will move it enough so that the result is less than kInfiniteCoordinate. Bug: 1224066 Change-Id: I7df134c277f280987405d0d0c2d47de15d3ef55d Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3002270 Reviewed-by: Robert Flack <flackr@chromium.org> Commit-Queue: David Baron <dbaron@chromium.org> Cr-Commit-Position: refs/heads/master@{#898172}
web-platform-tests · Jul 2, 2021 · 4282133 · 4282133
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commit 4282133
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diff --git a/css/css-transforms/crashtests/preserve3d-scene-001.html b/css/css-transforms/crashtests/preserve3d-scene-001.html
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+<!DOCTYPE HTML>
+<title>CSS Test (Transforms): Very large values in matrix3d()</title>
+<link rel="author" title="L. David Baron" href="https://dbaron.org/">
+<link rel="author" title="Google" href="http://www.google.com/">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1224066">
+<meta name="assert" content="This should not crash.">
+<style>
+
+.outer {
+  column-count:16384;
+  -webkit-mask-box-image: url('?') 10% 90% repeat;
+}
+
+.middle {
+  -webkit-transform-style:preserve-3d;
+  display:list-item;
+}
+
+table {
+  height:7.1px;
+  padding-right:4em;
+  transform:matrix3d(0,7.8,+9,+2,-3.6,3.4,6,8.8,9.5,7,7.3,5.3,6.4,3.7,8.3,8);
+  border-left: medium black solid;
+}
+
+tbody {
+  font:icon;
+}
+
+</style>
+
+<div class="outer"><div class="middle"><table>