Bug 87985 – [Cairo] Implementation of GraphicsContext does not save/restore ImageInterpolation correctly

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Mario Sanchez Prada]

After the patch for bug 87853, layout test fast/canvas/canvas-imageSmoothingEnabled.html has been consistently failing in the bots, with the following diff:

--- /home/slave/webkitgtk/gtk-linux-64-release/build/layout-test-results/fast/canvas/canvas-imageSmoothingEnabled-expected.txt 
+++ /home/slave/webkitgtk/gtk-linux-64-release/build/layout-test-results/fast/canvas/canvas-imageSmoothingEnabled-actual.txt 
@@ -23,9 +23,9 @@
 PASS left_of_center_pixel.data[1] !== 0 is true
 PASS left_of_center_pixel.data[2] !== 0 is true
 Test that restoring actually changes smoothing and not just the attribute value. We are restoring to a point where imageSmoothingEnabled is set to false.
-PASS left_of_center_pixel.data[0] is 0
-PASS left_of_center_pixel.data[1] is 0
-PASS left_of_center_pixel.data[2] is 0
+FAIL left_of_center_pixel.data[0] should be 0. Was 63.
+FAIL left_of_center_pixel.data[1] should be 0. Was 63.
+FAIL left_of_center_pixel.data[2] should be 0. Was 63.
 PASS successfullyParsed is true

 TEST COMPLETE

See two comments by Stephen White in that bug for some hints on what could be going on:
https://bugs.webkit.org/show_bug.cgi?id=87853#c8
https://bugs.webkit.org/show_bug.cgi?id=87853#c9

Adding to test_expectations.txt in the meanwhile

[Raphael Kubo da Costa (:rakuco)]

Since this seems to be an issue with the cairo backend, I'm retitling it to indicate so, as the EFL port is having the same issue.

[Dominik Röttsches (drott)]

will upload patch soon.

[Dominik Röttsches (drott)]

Created attachment 145544 [details]
Patch

[WebKit Review Bot]

Comment on attachment 145544 [details]
Patch

Clearing flags on attachment: 145544

Committed r119392: <http://trac.webkit.org/changeset/119392>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.