Changeset 60676 in webkit

Timestamp:

Jun 4, 2010 5:05:04 AM (14 years ago)

Author:

eric@webkit.org

Message:

2010-06-04 Vangelis Kokkevis <​vangelis@chromium.org>

Reviewed by Dimitri Glazkov.

[chromium] Fix scrolling bug with pages using accelerated compositing.
​https://bugs.webkit.org/show_bug.cgi?id=40037

• platform/graphics/chromium/LayerRendererChromium.cpp: (WebCore::LayerRendererChromium::LayerRendererChromium): (WebCore::LayerRendererChromium::drawLayers):

Location:

trunk/WebCore

Files:

• ChangeLog (modified) (1 diff)
• platform/graphics/chromium/LayerRendererChromium.cpp (modified) (2 diffs)

trunk/WebCore/ChangeLog

@@ +1 @@
+2010-06-04  Vangelis Kokkevis  <vangelis@chromium.org>
+
+        Reviewed by Dimitri Glazkov.
+
+        [chromium] Fix scrolling bug with pages using accelerated compositing.
+        https://bugs.webkit.org/show_bug.cgi?id=40037
+
+        * platform/graphics/chromium/LayerRendererChromium.cpp:
+        (WebCore::LayerRendererChromium::LayerRendererChromium):
+        (WebCore::LayerRendererChromium::drawLayers):
+
 2010-06-04  Matthew Delaney  <mdelaney@apple.com>
 

trunk/WebCore/platform/graphics/chromium/LayerRendererChromium.cpp

@@ -174 +174 @@
     , m_rootLayerTextureWidth(0)
     , m_rootLayerTextureHeight(0)
+    , m_scrollPosition(IntPoint(-1, -1))
 {
     m_quadVboIds[Vertices] = m_quadVboIds[LayerElements] = 0;
@@ -284 +285 @@
     glDisable(GL_DEPTH_TEST);
     glDisable(GL_CULL_FACE);
+
+    if (m_scrollPosition == IntPoint(-1, -1))
+        m_scrollPosition = scrollPosition;
 
     IntPoint scrollDelta = toPoint(scrollPosition - m_scrollPosition);