Bug 170082 – [Mac] Remove backing store for layers that are outside the viewport

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[Andreas Kling]

<rdar://problem/31245009>

On iOS we already detach backing stores for compositing layers outside of the tiling coverage rect.
Let's bring this feature Back to the Mac(tm)!

[Andreas Kling]

Created attachment 305333 [details]
Proposed patch

[Build Bot]

Attachment 305333 [details] did not pass style-queue:


ERROR: Source/WebCore/testing/Internals.h:282:  enum members should use InterCaps with an initial capital letter or initial 'k' for C-style enums.  [readability/enum_casing] [4]
ERROR: LayoutTests/ChangeLog:1:  ChangeLog entry has no bug number  [changelog/bugnumber] [5]
Total errors found: 2 in 17 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Andreas Kling]

Created attachment 305335 [details]
Proposed patch

[Build Bot]

Attachment 305335 [details] did not pass style-queue:


ERROR: Source/WebCore/testing/Internals.h:282:  enum members should use InterCaps with an initial capital letter or initial 'k' for C-style enums.  [readability/enum_casing] [4]
Total errors found: 1 in 17 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Simon Fraser (smfr)]

Comment on attachment 305335 [details]
Proposed patch

View in context: https://bugs.webkit.org/attachment.cgi?id=305335&action=review

> LayoutTests/ChangeLog:4
> +        <https://webkit.org/b/170082>

This isn't the format that webkit-patch uses.

[Build Bot]

Comment on attachment 305335 [details]
Proposed patch

Attachment 305335 [details] did not pass mac-wk2-ews (mac-wk2):
Output: http://webkit-queues.webkit.org/results/3406479

New failing tests:
fast/text-autosizing/text-size-adjust-inline-style.html
fast/hidpi/filters-and-image-buffer-resolution.html

[Build Bot]

Created attachment 305345 [details]
Archive of layout-test-results from ews105 for mac-elcapitan-wk2

The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews.
Bot: ews105  Port: mac-elcapitan-wk2  Platform: Mac OS X 10.11.6

[Build Bot]

Comment on attachment 305335 [details]
Proposed patch

Attachment 305335 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: http://webkit-queues.webkit.org/results/3406508

New failing tests:
compositing/backing-store-attachment-1.html

[Build Bot]

Created attachment 305351 [details]
Archive of layout-test-results from ews123 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews123  Port: ios-simulator-wk2  Platform: Mac OS X 10.11.6

[Andreas Kling]

Created attachment 311790 [details]
Proposed patch

- Fix the layout test failures by simply never detaching backing stores for scroll control layers.
- Add iOS baseline for the new test.

[Build Bot]

Attachment 311790 [details] did not pass style-queue:


ERROR: Source/WebCore/testing/Internals.h:297:  enum members should use InterCaps with an initial capital letter or initial 'k' for C-style enums.  [readability/enum_casing] [4]
Total errors found: 1 in 19 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Simon Fraser (smfr)]

Comment on attachment 311790 [details]
Proposed patch

View in context: https://bugs.webkit.org/attachment.cgi?id=311790&action=review

> Source/WebCore/platform/graphics/GraphicsLayer.h:552
> +    bool mayDetachBackingStore() const { return m_mayDetachBackingStore; }

canDetach? setNeverDetach?

[Andreas Kling]

Created attachment 311797 [details]
Patch for landing

Sure, let's go with canDetach.

[WebKit Commit Bot]

Comment on attachment 311797 [details]
Patch for landing

Rejecting attachment 311797 [details] from commit-queue.

New failing tests:
compositing/backing-store-attachment-1.html
Full output: http://webkit-queues.webkit.org/results/3857545

[WebKit Commit Bot]

Created attachment 311799 [details]
Archive of layout-test-results from webkit-cq-01 for mac-elcapitan

The attached test failures were seen while running run-webkit-tests on the commit-queue.
Bot: webkit-cq-01  Port: mac-elcapitan  Platform: Mac OS X 10.11.6

[Andreas Kling]

Created attachment 311800 [details]
Patch for landing

Oops, I messed up a bool condition while playing with "canDetach" vs "neverDetach" :|
thx2cq for catching it.

[Build Bot]

Attachment 311800 [details] did not pass style-queue:


ERROR: Source/WebCore/testing/Internals.h:297:  enum members should use InterCaps with an initial capital letter or initial 'k' for C-style enums.  [readability/enum_casing] [4]
Total errors found: 1 in 19 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[WebKit Commit Bot]

Comment on attachment 311800 [details]
Patch for landing

Clearing flags on attachment: 311800

Committed r217696: <http://trac.webkit.org/changeset/217696>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.