gistfile1.txt

commit a28a381123e2f9bcbe06de1353b2d8a86d43db4c
Author: Kenneth Rohde Christiansen <kenneth@webkit.org>
Date:   Mon Mar 5 14:12:48 2012 +0100

    Improve some of the comments in the tiled backing store.

diff --git a/Source/WebCore/platform/graphics/TiledBackingStore.cpp b/Source/WebCore/platform/graphics/TiledBackingStore.cpp
index 3ac5285..6922f91 100644
--- a/Source/WebCore/platform/graphics/TiledBackingStore.cpp
+++ b/Source/WebCore/platform/graphics/TiledBackingStore.cpp
@@ -260,6 +260,9 @@ void TiledBackingStore::createTiles()
     Vector<Tile::Coordinate> tilesToCreate;
     unsigned requiredTileCount = 0;
 
+    // Cover areas (in tiles) with minimum distance from the visible rect. If the visible rect is
+    // not covered already it will be covered first in one go, due to the distance being 0 for tiles
+    // inside the visible rect.
     Tile::Coordinate topLeft = tileCoordinateForPoint(coverRect.location());
     Tile::Coordinate bottomRight = tileCoordinateForPoint(innerBottomRight(coverRect));
     for (unsigned yCoordinate = topLeft.y(); yCoordinate <= bottomRight.y(); ++yCoordinate) {
@@ -268,7 +271,6 @@ void TiledBackingStore::createTiles()
             if (tileAt(currentCoordinate))
                 continue;
             ++requiredTileCount;
-            // Distance is 0 for all tiles inside the visibleRect.
             double distance = tileDistance(visibleRect, currentCoordinate);
             if (distance > shortestDistance)
                 continue;
@@ -288,7 +290,7 @@ void TiledBackingStore::createTiles()
     }
     requiredTileCount -= tilesToCreateCount;
 
-    // Paint the content of the newly created tiles.
+    // Paint the content of the newly created tiles or resized tiles.
     if (tilesToCreateCount || didResizeTiles)
         updateTileBuffers();