[TexMap] REGRESSION(144183): It make negative delay tests fails

https://bugs.webkit.org/show_bug.cgi?id=110989

Reviewed by Noam Rosenthal.

Do not apply a negative offset to the animation starttime send to the GraphicLayerClient,
it needs the actual animation start not a virtual start.

* platform/graphics/texmap/GraphicsLayerTextureMapper.cpp:
(WebCore::GraphicsLayerTextureMapper::addAnimation):

Change-Id: I29824c949eb3975aa3ef56a966296e1fac436b50
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144204 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/Source/WebCore/platform/graphics/texmap/GraphicsLayerTextureMapper.cpp b/Source/WebCore/platform/graphics/texmap/GraphicsLayerTextureMapper.cpp
index 136dc2169..5ba109066 100644
--- a/Source/WebCore/platform/graphics/texmap/GraphicsLayerTextureMapper.cpp
+++ b/Source/WebCore/platform/graphics/texmap/GraphicsLayerTextureMapper.cpp
@@ -543,8 +543,13 @@ bool GraphicsLayerTextureMapper::addAnimation(const KeyframeValueList& valueList
     if (valueList.property() == AnimatedPropertyWebkitTransform)
         listsMatch = validateTransformOperations(valueList, hasBigRotation) >= 0;
 
-    m_animationStartTime = WTF::currentTime() - timeOffset;
-    m_animations.add(GraphicsLayerAnimation(keyframesName, valueList, boxSize, anim, m_animationStartTime, listsMatch));
+    const double currentTime = WTF::currentTime();
+    m_animations.add(GraphicsLayerAnimation(keyframesName, valueList, boxSize, anim, currentTime - timeOffset, listsMatch));
+    // m_animationStartTime is the time of the first real frame of animation, now or delayed by a negative offset.
+    if (timeOffset > 0)
+        m_animationStartTime = currentTime;
+    else
+        m_animationStartTime = currentTime - timeOffset;
     notifyChange(TextureMapperLayer::AnimationChange);
     m_animationStartedTimer.startOneShot(0);
     return true;