| Index: third_party/WebKit/Source/core/paint/TextPainter.h
|
| diff --git a/third_party/WebKit/Source/core/paint/TextPainter.h b/third_party/WebKit/Source/core/paint/TextPainter.h
|
| index caedf3547520327a0b98b181cbd10b23432f74dd..0b58bd98bdea51645ede7b13ef30645d8d04fbd9 100644
|
| --- a/third_party/WebKit/Source/core/paint/TextPainter.h
|
| +++ b/third_party/WebKit/Source/core/paint/TextPainter.h
|
| @@ -124,13 +124,17 @@ inline AffineTransform TextPainter::rotation(
|
| RotationDirection rotationDirection) {
|
| // Why this matrix is correct: consider the case of a clockwise rotation.
|
|
|
| - // Let the corner points that define |boxRect| be ABCD, where A is top-left and B is bottom-left.
|
| + // Let the corner points that define |boxRect| be ABCD, where A is top-left
|
| + // and B is bottom-left.
|
|
|
| - // 1. We want B to end up at the same pixel position after rotation as A is before rotation.
|
| + // 1. We want B to end up at the same pixel position after rotation as A is
|
| + // before rotation.
|
| // 2. Before rotation, B is at (x(), maxY())
|
| - // 3. Rotating clockwise by 90 degrees places B at the coordinates (-maxY(), x()).
|
| + // 3. Rotating clockwise by 90 degrees places B at the coordinates
|
| + // (-maxY(), x()).
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| // 4. Point A before rotation is at (x(), y())
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| - // 5. Therefore the translation from (3) to (4) is (x(), y()) - (-maxY(), x()) = (x() + maxY(), y() - x())
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| + // 5. Therefore the translation from (3) to (4) is (x(), y()) - (-maxY(), x())
|
| + // = (x() + maxY(), y() - x())
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|
|
| // A similar argument derives the counter-clockwise case.
|
| return rotationDirection == Clockwise
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|
|