Issue #1619 - Convert Intrinsic Ratio to Float

https://bugzilla.mozilla.org/show_bug.cgi?id=1547792

Aspect Ratio handling simplified by using floating point integers:
- Multiplication of value (or inverse value) to a known side for Scaling
- No unequal equal values such as "4/3" vs "8/6" vs "20/15"
- Truly "Empty" aspect ratios, even if one dimension is not 0

1 files changed, 6 insertions, 7 deletions

diff --git a/layout/generic/nsImageFrame.cpp b/layout/generic/nsImageFrame.cpp
index 03fcbd8e3..68076ce1e 100644
--- a/layout/generic/nsImageFrame.cpp
+++ b/layout/generic/nsImageFrame.cpp
@@ -138,7 +138,6 @@ NS_IMPL_FRAMEARENA_HELPERS(nsImageFrame)
 nsImageFrame::nsImageFrame(nsStyleContext* aContext) :
   nsAtomicContainerFrame(aContext),
   mComputedSize(0, 0),
-  mIntrinsicRatio(0, 0),
   mDisplayingIcon(false),
   mFirstFrameComplete(false),
   mReflowCallbackPosted(false),
@@ -325,11 +324,11 @@ nsImageFrame::UpdateIntrinsicRatio(imgIContainer* aImage)
   if (!aImage)
     return false;
 
-  nsSize oldIntrinsicRatio = mIntrinsicRatio;
+  AspectRatio oldIntrinsicRatio = mIntrinsicRatio;
 
   // Set intrinsic ratio to match aImage's reported intrinsic ratio.
   if (NS_FAILED(aImage->GetIntrinsicRatio(&mIntrinsicRatio)))
-    mIntrinsicRatio.SizeTo(0, 0);
+    mIntrinsicRatio = AspectRatio();
 
   return mIntrinsicRatio != oldIntrinsicRatio;
 }
@@ -557,7 +556,7 @@ nsImageFrame::OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage)
     // Have to size to 0,0 so that GetDesiredSize recalculates the size.
     mIntrinsicSize.width.SetCoordValue(0);
     mIntrinsicSize.height.SetCoordValue(0);
-    mIntrinsicRatio.SizeTo(0, 0);
+    mIntrinsicRatio = AspectRatio();
     intrinsicSizeChanged = true;
   }
 
@@ -672,7 +671,7 @@ nsImageFrame::NotifyNewCurrentRequest(imgIRequest *aRequest,
     // Have to size to 0,0 so that GetDesiredSize recalculates the size
     mIntrinsicSize.width.SetCoordValue(0);
     mIntrinsicSize.height.SetCoordValue(0);
-    mIntrinsicRatio.SizeTo(0, 0);
+    mIntrinsicRatio = AspectRatio();
   }
 
   if (mState & IMAGE_GOTINITIALREFLOW) { // do nothing if we haven't gotten the initial reflow yet
@@ -808,7 +807,7 @@ nsImageFrame::EnsureIntrinsicSizeAndRatio()
               ICON_SIZE + (2 * (ICON_PADDING + ALT_BORDER_WIDTH)));
           mIntrinsicSize.width.SetCoordValue(edgeLengthToUse);
           mIntrinsicSize.height.SetCoordValue(edgeLengthToUse);
-          mIntrinsicRatio.SizeTo(1, 1);
+          mIntrinsicRatio = AspectRatio(1.0f);
         }
       }
     }
@@ -932,7 +931,7 @@ nsImageFrame::GetIntrinsicSize()
   return mIntrinsicSize;
 }
 
-/* virtual */ nsSize
+/* virtual */ AspectRatio
 nsImageFrame::GetIntrinsicRatio()
 {
   return mIntrinsicRatio;