Adam Comella 786ccddd7b Fix rounding of negative numbers (#825) ...

Summary:
`YGRoundValueToPixelGrid` currently rounds negative numbers incorrectly. For example:

```
YGRoundValueToPixelGrid(-2.2, 1.0, /* ceil */ false, /* floor */ true) = -2.0
```

However, that operation is supposed to take the floor of the number so the result should acutally be `-3.0`.

There's a detailed comment in `YGRoundValueToPixelGrid` about the fix and why it works.

A symptom that manifested because of this bug is that text nodes could get smaller and smaller on each layout pass. For details see https://github.com/facebook/yoga/issues/824.

Fixes #824

Adam Comella
Microsoft Corp.
Pull Request resolved: https://github.com/facebook/yoga/pull/825

Reviewed By: priteshrnandgaonkar

Differential Revision: D10282064

Pulled By: shergin

fbshipit-source-id: 16ca966e6cb0cfc88b1dbf4ba31e7b1dbe1f2049

2018-10-11 18:21:49 -07:00

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YGAbsolutePositionTest.cpp

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YGAlignBaselineTest.cpp

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YGAlignContentTest.cpp

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YGAlignItemsTest.cpp

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YGAlignSelfTest.cpp

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YGAndroidNewsFeed.cpp

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YGAspectRatioTest.cpp

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YGBaselineFuncTest.cpp

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YGBorderTest.cpp

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YGComputedMarginTest.cpp

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YGComputedPaddingTest.cpp

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YGDefaultValuesTest.cpp

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YGDimensionTest.cpp

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YGDirtiedTest.cpp

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YGDirtyMarkingTest.cpp

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YGDisplayTest.cpp

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YGEdgeTest.cpp

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YGFlexDirectionTest.cpp

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YGFlexTest.cpp

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YGFlexWrapTest.cpp

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YGHadOverflowTest.cpp

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YGInfiniteHeightTest.cpp

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YGJustifyContentTest.cpp

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YGLayoutDiffingTest.cpp

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YGLoggerTest.cpp

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YGMarginTest.cpp

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YGMeasureCacheTest.cpp

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YGMeasureModeTest.cpp

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YGMeasureTest.cpp

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YGMinMaxDimensionTest.cpp

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YGNodeChildTest.cpp

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YGPaddingTest.cpp

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YGPercentageTest.cpp

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YGPersistenceTest.cpp

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YGRelayoutTest.cpp

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YGRoundingFunctionTest.cpp

Fix rounding of negative numbers (#825)

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YGRoundingMeasureFuncTest.cpp

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YGRoundingTest.cpp

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YGSizeOverflowTest.cpp

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YGStyleTest.cpp

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YGTraversalTest.cpp

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YGTreeMutationTest.cpp

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YGZeroOutLayoutRecursivlyTest.cpp

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