Bug 48016 – [chromium] Linux: compositing test failures due to differently sized layers

• Component: Tools / Tests
• Status: RESOLVED WONTFIX

[Kenneth Russell]

There are a few failures of compositing/ layout tests when run on Linux in DRT / NRWT due to differently sized layers than on Windows. Since the layout code should be platform independent, it is unclear why these differences are present, and they need to be investigated.

compositing/geometry/limit-layer-bounds-positioned-transition.html
compositing/geometry/limit-layer-bounds-transformed.html
compositing/geometry/vertical-scroll-composited.html

[James Robinson]

How different are the values?  I don't think scrollbars are exactly the same size on windows vs linux.

[Kenneth Russell]

The values are very different, and indicate something like failure to clip the layer to the visible window or similar.

It's possible there were code changes between the times these two baselines were generated that would affect the results.

--- /usr/local/google/home/kbr/src/chrome6/src/webkit/Debug/layout-test-results/compositing/geometry/limit-layer-bounds-positioned-transition-expected.txt 
+++ /usr/local/google/home/kbr/src/chrome6/src/webkit/Debug/layout-test-results/compositing/geometry/limit-layer-bounds-positioned-transition-actual.txt 
@@ -1,9 +1,9 @@
 Text here
 (GraphicsLayer
-  (bounds 800.00 600.00)
+  (bounds 1429.00 585.00)
   (children 1
     (GraphicsLayer
-      (bounds 800.00 600.00)
+      (bounds 1429.00 585.00)
       (children 3
         (GraphicsLayer
           (position 29.00 29.00)

--- /usr/local/google/home/kbr/src/chrome6/src/webkit/Debug/layout-test-results/compositing/geometry/limit-layer-bounds-transformed-expected.txt 
+++ /usr/local/google/home/kbr/src/chrome6/src/webkit/Debug/layout-test-results/compositing/geometry/limit-layer-bounds-transformed-actual.txt 
@@ -1,9 +1,9 @@
 Text here
 (GraphicsLayer
-  (bounds 800.00 600.00)
+  (bounds 1329.00 585.00)
   (children 1
     (GraphicsLayer
-      (bounds 800.00 600.00)
+      (bounds 1329.00 585.00)
       (children 3
         (GraphicsLayer
           (position 129.00 29.00)

--- /usr/local/google/home/kbr/src/chrome6/src/webkit/Debug/layout-test-results/compositing/geometry/vertical-scroll-composited-expected.txt 
+++ /usr/local/google/home/kbr/src/chrome6/src/webkit/Debug/layout-test-results/compositing/geometry/vertical-scroll-composited-actual.txt 
@@ -1,4 +1,4 @@
-layer at (0,0) size 814x1014
+layer at (0,0) size 962x1122
   RenderView at (0,0) size 785x585
 layer at (0,0) size 785x616
   RenderBlock {HTML} at (0,0) size 785x616

[Stephen Chenney]

LayoutTest failures for Chromium are being marked WontFix. The Bug is still accessible and referenced from TestExpectations.