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Merge "Improve comparison of fractions"

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Treehugger Robot
2019-10-01 17:30:17 +00:00
committed by Gerrit Code Review
parent c75cf96f72 f2539c3bac
commit 0517cd144f
1 changed files with 6 additions and 19 deletions
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25
libs/hwui/pipeline/skia/LayerDrawable.cpp
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@@ -43,41 +43,28 @@ static bool shouldFilterRect(const SkMatrix& matrix, const SkRect& srcRect, cons
if (!matrix.rectStaysRect()) return true;
SkRect dstDevRect = matrix.mapRect(dstRect);
float dstW, dstH;
bool requiresIntegerTranslate = false;
if (MathUtils::isZero(matrix.getScaleX()) && MathUtils::isZero(matrix.getScaleY())) {
// Has a 90 or 270 degree rotation, although total matrix may also have scale factors
// in m10 and m01. Those scalings are automatically handled by mapRect so comparing
// dimensions is sufficient, but swap width and height comparison.
dstW = dstDevRect.height();
dstH = dstDevRect.width();
requiresIntegerTranslate = true;
} else {
// Handle H/V flips or 180 rotation matrices. Axes may have been mirrored, but
// dimensions are still safe to compare directly.
dstW = dstDevRect.width();
dstH = dstDevRect.height();
requiresIntegerTranslate =
matrix.getScaleX() < -NON_ZERO_EPSILON || matrix.getScaleY() < -NON_ZERO_EPSILON;
}
if (!(MathUtils::areEqual(dstW, srcRect.width()) &&
MathUtils::areEqual(dstH, srcRect.height()))) {
return true;
}
if (requiresIntegerTranslate) {
// Device rect and source rect should be integer aligned to ensure there's no difference
// in how nearest-neighbor sampling is resolved.
return !(isIntegerAligned(srcRect.x()) &&
isIntegerAligned(srcRect.y()) &&
isIntegerAligned(dstDevRect.x()) &&
isIntegerAligned(dstDevRect.y()));
} else {
// As long as src and device rects are translated by the same fractional amount,
// filtering won't be needed
return !(MathUtils::areEqual(SkScalarFraction(srcRect.x()),
SkScalarFraction(dstDevRect.x())) &&
MathUtils::areEqual(SkScalarFraction(srcRect.y()),
SkScalarFraction(dstDevRect.y())));
}
// Device rect and source rect should be integer aligned to ensure there's no difference
// in how nearest-neighbor sampling is resolved.
return !(isIntegerAligned(srcRect.x()) &&
isIntegerAligned(srcRect.y()) &&
isIntegerAligned(dstDevRect.x()) &&
isIntegerAligned(dstDevRect.y()));
}
bool LayerDrawable::DrawLayer(GrContext* context, SkCanvas* canvas, Layer* layer,