Changeset 215507 in webkit

Timestamp:

Apr 19, 2017, 5:15:37 AM (8 years ago)

Author:

Antti Koivisto

Message:

Avoid repaints for invisible animations on tumblr.com/search/aww
​https://bugs.webkit.org/show_bug.cgi?id=170986
<rdar://problem/28644580>

Reviewed by Andreas Kling.

Source/WebCore:

Test: fast/repaint/mutate-non-visible.html

• rendering/style/RenderStyle.cpp:

(WebCore::requiresPainting):
(WebCore::RenderStyle::changeRequiresRepaint):

If an element is invisible it does not require repaint even if something else changes.

LayoutTests:

• fast/repaint/mutate-non-visible-expected.txt: Added.
• fast/repaint/mutate-non-visible.html: Added.

Location:

trunk

Files:

• LayoutTests/ChangeLog (modified) (1 diff)
• LayoutTests/fast/repaint/mutate-non-visible-expected.txt (added)
• LayoutTests/fast/repaint/mutate-non-visible.html (added)
• Source/WebCore/ChangeLog (modified) (1 diff)
• Source/WebCore/rendering/style/RenderStyle.cpp (modified) (1 diff)

trunk/LayoutTests/ChangeLog

@@ +1 @@
+2017-04-19  Antti Koivisto  <antti@apple.com>
+
+        Avoid repaints for invisible animations on tumblr.com/search/aww
+        https://bugs.webkit.org/show_bug.cgi?id=170986
+        <rdar://problem/28644580>
+
+        Reviewed by Andreas Kling.
+
+        * fast/repaint/mutate-non-visible-expected.txt: Added.
+        * fast/repaint/mutate-non-visible.html: Added.
+
 2017-04-18  John Wilander  <wilander@apple.com>
 

trunk/Source/WebCore/ChangeLog

@@ +1 @@
+2017-04-19  Antti Koivisto  <antti@apple.com>
+
+        Avoid repaints for invisible animations on tumblr.com/search/aww
+        https://bugs.webkit.org/show_bug.cgi?id=170986
+        <rdar://problem/28644580>
+
+        Reviewed by Andreas Kling.
+
+        Test: fast/repaint/mutate-non-visible.html
+
+        * rendering/style/RenderStyle.cpp:
+        (WebCore::requiresPainting):
+        (WebCore::RenderStyle::changeRequiresRepaint):
+
+            If an element is invisible it does not require repaint even if something else changes.
+
 2017-04-19  Dean Jackson  <dino@apple.com>
 

trunk/Source/WebCore/rendering/style/RenderStyle.cpp

@@ -844 +844 @@
 }
 
+static bool requiresPainting(const RenderStyle& style)
+{
+    if (style.visibility() == HIDDEN)
+        return false;
+    if (!style.opacity())
+        return false;
+    return true;
+}
+
 bool RenderStyle::changeRequiresRepaint(const RenderStyle& other, unsigned& changedContextSensitiveProperties) const
 {
+    if (!requiresPainting(*this) && !requiresPainting(other))
+        return false;
+
     if (m_inheritedFlags.visibility != other.m_inheritedFlags.visibility
         || m_inheritedFlags.printColorAdjust != other.m_inheritedFlags.printColorAdjust