When in singlesurfacemode, resist switching out - DO NOT MERGE

[android-x86/external-webkit.git] / Source / WebCore / platform / graphics / android / GLWebViewState.cpp

diff --git a/Source/WebCore/platform/graphics/android/GLWebViewState.cpp b/Source/WebCore/platform/graphics/android/GLWebViewState.cpp
index 273c478..2cc2d85 100644 (file)
--- a/Source/WebCore/platform/graphics/android/GLWebViewState.cpp
+++ b/Source/WebCore/platform/graphics/android/GLWebViewState.cpp
@@ -132,6 +132,7 @@ void GLWebViewState::setBaseLayer(BaseLayerAndroid* layer, const SkRegion& inval
         // TODO: move this into TreeManager
         m_tiledPageA->discardTextures();
         m_tiledPageB->discardTextures();
+        m_layersRenderingMode = kAllTextures;
     }
     if (layer) {
         XLOG("new base layer %p, (inval region empty %d) with child %p", layer, inval.isEmpty(), layer->getChild(0));
@@ -376,6 +377,12 @@ bool GLWebViewState::setLayersRenderingMode(TexturesResult& nbTexturesNeeded)
     int maxTextures = TilesManager::instance()->maxLayerTextureCount();
     LayersRenderingMode layersRenderingMode = m_layersRenderingMode;
 
+    if (m_layersRenderingMode == kSingleSurfaceRendering) {
+        // only switch out of SingleSurface mode, if we have 2x needed textures
+        // to avoid changing too often
+        maxTextures /= 2;
+    }
+
     m_layersRenderingMode = kSingleSurfaceRendering;
     if (nbTexturesNeeded.fixed < maxTextures)
         m_layersRenderingMode = kFixedLayers;