Backout bug 768775 for now

layout/base/nsCSSRendering.cpp

@@ -1997,7 +1997,6 @@ nsCSSRendering::PaintGradient(nsPresContext* aPresContext,
 
   // Create the gradient pattern.
   nsRefPtr<gfxPattern> gradientPattern;
-  bool forceRepeatToCoverTiles = false;
   if (aGradient->mShape == NS_STYLE_GRADIENT_SHAPE_LINEAR) {
     // Compute the actual gradient line ends we need to pass to cairo after
     // stops have been normalized.
@@ -2016,16 +2015,6 @@ nsCSSRendering::PaintGradient(nsPresContext* aPresContext,
 
     gradientPattern = new gfxPattern(gradientStart.x, gradientStart.y,
                                      gradientEnd.x, gradientEnd.y);
-
-    // When the gradient line is parallel to the x axis from the left edge
-    // to the right edge of a tile, then we can repeat by just repeating the
-    // gradient.
-    if ((gradientStart.y == gradientEnd.y && gradientStart.x == 0 &&
-         gradientEnd.x == oneCellArea.width) ||
-        (gradientStart.x == gradientEnd.x && gradientStart.y == 0 &&
-         gradientEnd.y == oneCellArea.height)) {
-      forceRepeatToCoverTiles = true;
-    }
   } else {
     NS_ASSERTION(firstStop >= 0.0,
                  "Negative stops not allowed for radial gradients");
@@ -2076,7 +2065,7 @@ nsCSSRendering::PaintGradient(nsPresContext* aPresContext,
   }
 
   // Set repeat mode. Default cairo extend mode is PAD.
-  if (aGradient->mRepeating || forceRepeatToCoverTiles) {
+  if (aGradient->mRepeating) {
     gradientPattern->SetExtend(gfxPattern::EXTEND_REPEAT);
   }
 
@@ -2095,9 +2084,8 @@ nsCSSRendering::PaintGradient(nsPresContext* aPresContext,
   // xStart/yStart are the top-left corner of the top-left tile.
   nscoord xStart = FindTileStart(dirty.x, aOneCellArea.x, aOneCellArea.width);
   nscoord yStart = FindTileStart(dirty.y, aOneCellArea.y, aOneCellArea.height);
-  nscoord xEnd = forceRepeatToCoverTiles ? xStart + aOneCellArea.width : dirty.XMost();
-  nscoord yEnd = forceRepeatToCoverTiles ? yStart + aOneCellArea.height : dirty.YMost();
-
+  nscoord xEnd = dirty.XMost();
+  nscoord yEnd = dirty.YMost();
   // x and y are the top-left corner of the tile to draw
   for (nscoord y = yStart; y < yEnd; y += aOneCellArea.height) {
     for (nscoord x = xStart; x < xEnd; x += aOneCellArea.width) {
@@ -2107,8 +2095,7 @@ nsCSSRendering::PaintGradient(nsPresContext* aPresContext,
                       appUnitsPerPixel);
       // The actual area to fill with this tile is the intersection of this
       // tile with the overall area we're supposed to be filling
-      gfxRect fillRect =
-        forceRepeatToCoverTiles ? areaToFill : tileRect.Intersect(areaToFill);
+      gfxRect fillRect = tileRect.Intersect(areaToFill);
       ctx->NewPath();
       ctx->Translate(tileRect.TopLeft());
       ctx->SetPattern(gradientPattern);

layout/reftests/image-element/reftest.list

@@ -35,8 +35,8 @@ random-if(d2d) == element-paint-transform-02.html element-paint-transform-02-ref
 random-if(!cocoaWidget) == gradient-html-03.html gradient-html-03-ref.svg
 == gradient-html-04.html gradient-html-04-ref.html
 == gradient-html-05.html gradient-html-05-ref.html
-fuzzy(1,9627) random-if(!cocoaWidget) == gradient-html-06a.html gradient-html-06b.html
-fuzzy(1,9627) random-if(!cocoaWidget) == gradient-html-06b.html gradient-html-06c.html
+random-if(!cocoaWidget) == gradient-html-06a.html gradient-html-06b.html
+random-if(!cocoaWidget) == gradient-html-06b.html gradient-html-06c.html
 == gradient-html-06c.html gradient-html-06d.html
 == gradient-html-06d.html gradient-html-06e.html
 random-if(!cocoaWidget) == gradient-html-07a.html gradient-html-07b.html