Ensure non-ready tiles are painted with the page background color.

bug: 3465059
Change-Id: Ia6e5ec7e9f68d641f5bf0df34c04c5c9958a4046

4 files changed, 8 insertions, 1 deletions

diff --git a/WebCore/platform/graphics/android/BaseLayerAndroid.cpp b/WebCore/platform/graphics/android/BaseLayerAndroid.cpp
index 35c3b36..e760300 100644
--- a/WebCore/platform/graphics/android/BaseLayerAndroid.cpp
+++ b/WebCore/platform/graphics/android/BaseLayerAndroid.cpp
@@ -263,6 +263,7 @@ bool BaseLayerAndroid::drawGL(IntRect& viewRect, SkRect& visibleRect,
     XLOG("drawBasePicture drawGL() viewRect: %d, %d, %d, %d",
          left, top, width, height);
 
+    m_glWebViewState->setBackgroundColor(color);
     glClearColor((float)m_color.red() / 255.0,
                  (float)m_color.green() / 255.0,
                  (float)m_color.blue() / 255.0, 1);
diff --git a/WebCore/platform/graphics/android/BaseTile.cpp b/WebCore/platform/graphics/android/BaseTile.cpp
index e5275c6..acb500d 100644
--- a/WebCore/platform/graphics/android/BaseTile.cpp
+++ b/WebCore/platform/graphics/android/BaseTile.cpp
@@ -257,7 +257,7 @@ void BaseTile::paintBitmap()
     SkCanvas* canvas = texture->canvas();
 
     canvas->save();
-    canvas->drawARGB(0, 0, 0, 0, SkXfermode::kClear_Mode);
+    canvas->drawColor(tiledPage->glWebViewState()->getBackgroundColor());
     canvas->scale(scale, scale);
     canvas->translate(-x * w, -y * h);
 
diff --git a/WebCore/platform/graphics/android/GLWebViewState.cpp b/WebCore/platform/graphics/android/GLWebViewState.cpp
index 53d5c5e..a48bf72 100644
--- a/WebCore/platform/graphics/android/GLWebViewState.cpp
+++ b/WebCore/platform/graphics/android/GLWebViewState.cpp
@@ -68,6 +68,7 @@ GLWebViewState::GLWebViewState(android::Mutex* buttonMutex)
     , m_usePageA(true)
     , m_globalButtonMutex(buttonMutex)
     , m_baseLayerUpdate(true)
+    , m_backgroundColor(SK_ColorWHITE)
 {
     m_viewport.setEmpty();
     m_previousViewport.setEmpty();
diff --git a/WebCore/platform/graphics/android/GLWebViewState.h b/WebCore/platform/graphics/android/GLWebViewState.h
index d28c16a..32157b1 100644
--- a/WebCore/platform/graphics/android/GLWebViewState.h
+++ b/WebCore/platform/graphics/android/GLWebViewState.h
@@ -208,6 +208,9 @@ public:
     bool drawGL(IntRect& rect, SkRect& viewport,
                 float scale, SkColor color = SK_ColorWHITE);
 
+    void setBackgroundColor(SkColor color) { m_backgroundColor = color; }
+    SkColor getBackgroundColor() { return m_backgroundColor; }
+
 private:
     void inval(const IntRect& rect); // caller must hold m_baseLayerLock
 
@@ -247,6 +250,8 @@ private:
 
     bool m_baseLayerUpdate;
     IntRect m_invalidateRect;
+
+    SkColor m_backgroundColor;
 };
 
 } // namespace WebCore