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Merge pull request #2359 from krisgiesing/scaling_quality

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Use bilinear interpolation when scaling images
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krisgiesing 2016-03-02 16:34:28 -08:00
commit 59ba45ef4d
1 changed files with 6 additions and 0 deletions
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6
packages/flutter/lib/src/painting/box_painter.dart
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@ -560,6 +560,12 @@ void paintImage({
Paint paint = new Paint()..isAntiAlias = false;
if (colorFilter != null)
paint.colorFilter = colorFilter;
if (sourceSize != destinationSize) {
// Use the "low" quality setting to scale the image, which corresponds to
// bilinear interpolation, rather than the default "none" which corresponds
// to nearest-neighbor.
paint.filterQuality = FilterQuality.low;
}
double dx = (outputSize.width - destinationSize.width) * (alignX ?? 0.5);
double dy = (outputSize.height - destinationSize.height) * (alignY ?? 0.5);
Point destinationPosition = rect.topLeft + new Offset(dx, dy);