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Issue #1754 - Fix clip path overflow.

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Resolves #1754.
This commit is contained in:
Moonchild 2021-03-26 17:19:27 +00:00 • committed by roytam1
commit a10c0bceab
4 changed files with 44 additions and 3 deletions
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10
layout/svg/nsCSSClipPathInstance.cpp
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@ -12,6 +12,7 @@
#include "mozilla/gfx/PathHelpers.h"
#include "nsCSSRendering.h"
#include "nsIFrame.h"
#include "nsMathUtils.h"
#include "nsRenderingContext.h"
#include "nsRuleNode.h"
@ -135,8 +136,6 @@ nsCSSClipPathInstance::CreateClipPathCircle(DrawTarget* aDrawTarget,
const nsTArray<nsStyleCoord>& coords = basicShape->Coordinates();
MOZ_ASSERT(coords.Length() == 1, "wrong number of arguments");
float referenceLength = sqrt((aRefBox.width * aRefBox.width +
aRefBox.height * aRefBox.height) / 2.0);
nscoord r = 0;
if (coords[0].GetUnit() == eStyleUnit_Enumerated) {
nscoord horizontal, vertical;
@ -150,7 +149,12 @@ nsCSSClipPathInstance::CreateClipPathCircle(DrawTarget* aDrawTarget,
r = horizontal < vertical ? horizontal : vertical;
}
} else {
r = nsRuleNode::ComputeCoordPercentCalc(coords[0], referenceLength);
// We resolve percent <shape-radius> value for circle() as defined here:
// https://drafts.csswg.org/css-shapes/#funcdef-circle
const double sqrt2 = std::sqrt(2.0);
double referenceLength = NS_hypot(aRefBox.width, aRefBox.height) / sqrt2;
r = nsRuleNode::ComputeCoordPercentCalc(coords[0],
NSToCoordRound(referenceLength));
}
nscoord appUnitsPerDevPixel =