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Bug 1121835: Deal with non-finite values in Path calls. r=bschouten

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This commit is contained in:
Milan Sreckovic 2015-01-19 14:19:25 -05:00
parent 158e29116c
commit a1bdbcfff9
2 changed files with 32 additions and 3 deletions
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10
gfx/2d/BasePoint.h
View File

@ -9,6 +9,8 @@
#include <cmath>
#include "mozilla/Attributes.h"
#include "mozilla/ToString.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/TypeTraits.h"
namespace mozilla {
namespace gfx {
@ -80,6 +82,14 @@ struct BasePoint {
return *static_cast<Sub*>(this);
}
// "Finite" means not inf and not NaN
bool IsFinite() const
{
typedef typename mozilla::Conditional<mozilla::IsSame<T, float>::value, float, double>::Type FloatType;
return (mozilla::IsFinite(FloatType(x)) && mozilla::IsFinite(FloatType(y)));
return true;
}
friend std::ostream& operator<<(std::ostream& stream, const BasePoint<T, Sub, Coord>& aPoint) {
return stream << '(' << aPoint.x << ',' << aPoint.y << ')';
}

25
gfx/2d/PathCG.cpp
View File

@ -20,12 +20,19 @@ PathBuilderCG::~PathBuilderCG()
void
PathBuilderCG::MoveTo(const Point &aPoint)
{
if (!aPoint.IsFinite()) {
return;
}
CGPathMoveToPoint(mCGPath, nullptr, aPoint.x, aPoint.y);
}
void
PathBuilderCG::LineTo(const Point &aPoint)
{
if (!aPoint.IsFinite()) {
return;
}
if (CGPathIsEmpty(mCGPath))
MoveTo(aPoint);
else
@ -37,6 +44,9 @@ PathBuilderCG::BezierTo(const Point &aCP1,
const Point &aCP2,
const Point &aCP3)
{
if (!aCP1.IsFinite() || !aCP2.IsFinite() || !aCP3.IsFinite()) {
return;
}
if (CGPathIsEmpty(mCGPath))
MoveTo(aCP1);
@ -49,13 +59,17 @@ PathBuilderCG::BezierTo(const Point &aCP1,
void
PathBuilderCG::QuadraticBezierTo(const Point &aCP1,
const Point &aCP2)
const Point &aCP2)
{
if (!aCP1.IsFinite() || !aCP2.IsFinite()) {
return;
}
if (CGPathIsEmpty(mCGPath))
MoveTo(aCP1);
CGPathAddQuadCurveToPoint(mCGPath, nullptr,
aCP1.x, aCP1.y,
aCP2.x, aCP2.y);
aCP1.x, aCP1.y,
aCP2.x, aCP2.y);
}
void
@ -69,6 +83,11 @@ void
PathBuilderCG::Arc(const Point &aOrigin, Float aRadius, Float aStartAngle,
Float aEndAngle, bool aAntiClockwise)
{
if (!aOrigin.IsFinite() || !IsFinite(aRadius) ||
!IsFinite(aStartAngle) || !IsFinite(aEndAngle)) {
return;
}
// Disabled for now due to a CG bug when using CGPathAddArc with stroke
// dashing and rotation transforms that are multiples of 90 degrees. See:
// https://bugzilla.mozilla.org/show_bug.cgi?id=949661#c8