[css-filters]: Migrate effect-reference-lighting-no-light.html to WPT

Original CL: https://codereview.chromium.org/1375793003 BUG=1063749 R=fs@opera.com Change-Id: I5b01b83b412ce0b3ad9f4391f0248241a02a36f4 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2138221 Commit-Queue: Antonio Gomes <tonikitoo@igalia.com> Reviewed-by: Fredrik Söderquist <fs@opera.com> Cr-Commit-Position: refs/heads/master@{#757177}

[css-filters]: Migrate effect-reference-lighting-no-light.html to WPT
Original CL: https://codereview.chromium.org/1375793003 BUG=1063749 R=fs@opera.com Change-Id: I5b01b83b412ce0b3ad9f4391f0248241a02a36f4 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2138221 Commit-Queue: Antonio Gomes <tonikitoo@igalia.com> Reviewed-by: Fredrik Söderquist <fs@opera.com> Cr-Commit-Position: refs/heads/master@{#757177}
0f1d2213 · Antonio Gomes · Commit Bot · d6f810ff · 0f1d2213 · 0f1d2213
Commit 0f1d2213 authored Apr 07, 2020 by Antonio Gomes Committed by Commit Bot Apr 07, 2020
2 changed files
--- a/third_party/blink/web_tests/css3/filters/effect-reference-lighting-no-light.html
+++ b/third_party/blink/web_tests/css3/filters/effect-reference-lighting-no-light.html
 <!DOCTYPE html>
+<title>CSS Filters: feDiffuseLighting and feSpecularLighting error handling.</title>
+<link rel="help" href="https://drafts.fxtf.org/filter-effects/#feDiffuseLightingElement">
+<link rel="help" href="https://drafts.fxtf.org/filter-effects/#feSpecularLightingElement">
+<link rel="match" href="reference/effect-reference-lighting-no-light.tentative-ref.html">
+<meta name="assert" content="This test ensures that invalid parameters to both feDiffuseLighting and feSpecularLighting produce transparent black."/>
 <style>
 .target {
  display: inline-block;
@@ -12,8 +17,12 @@
 <svg height="0" color-interpolation-filters="sRGB">
  <filter id="noLightDiffuse" x="0" y="0" width="1" height="1">
    <feDiffuseLighting lighting-color="blue"/>
+    <!-- Using 0.5 on the matrices below can cause in different engines
+     an off-by-one difference (127 vs. 128), when rounding 127.5 (255 * 0.5)
+     either up or downwards.
+     Hence, the test uses 0.502 (~128/255) to avoid this tie-break. -->
    <feColorMatrix values="1 0 0 0 0,
-                           0 1 0 0 0.5,
+                           0 1 0 0 0.502,
                           0 0 1 0 0,
                           0 0 0 1 1"/>
  </filter>
@@ -21,7 +30,7 @@
  <filter id="noLightSpecular" x="0" y="0" width="1" height="1">
    <feSpecularLighting lighting-color="blue"/>
    <feColorMatrix values="1 0 0 0 0,
-                           0 1 0 0 0.5,
+                           0 1 0 0 0.502,
                           0 0 1 0 0,
                           0 0 0 1 1"/>
  </filter>

--- a/third_party/blink/web_tests/css3/filters/effect-reference-lighting-no-light-expected.html
+++ b/third_party/blink/web_tests/css3/filters/effect-reference-lighting-no-light-expected.html