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0029830: STEPCAFControl_Reader poor performance - quadratic dependence

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Various performance improvements in STEP read/write algorithms:
- Search for the  label of a shape or component shape is improved using map mechanism instead of brute force iteration.
- Invariant FindEntities() is moved out of the loop in the method getStyledItem in STEPCAFControl/STEPCAFControl_Writer.cxx.
- A pointer to the end of binders chain is added in Transfer_Binder class to speed up adding a binder to the chain.
- Small fixes are added  to eliminate excess copying of handles, calls of handle DownCasts and so on.

Stack overflow is removed during destruction of STEP model with long chains of Transfer_Binder.
It is possible to use the Draw commands ReadStep and WriteStep to read/write from the session without accessing the disk file (use '.' for the file name).

Performance test cases for STEP reading/writing have been added.
This commit is contained in:
msv
2018-06-01 14:38:39 +03:00
committed by bugmaster
parent 0a96e0bbc4
commit 63cdf48ec1
17 changed files with 349 additions and 185 deletions
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26
src/StepVisual/StepVisual_StyledItem.cxx
View File

@@ -20,8 +20,6 @@
IMPLEMENT_STANDARD_RTTIEXT(StepVisual_StyledItem,StepRepr_RepresentationItem)
StepVisual_StyledItem::StepVisual_StyledItem () {}
void StepVisual_StyledItem::Init(
const Handle(TCollection_HAsciiString)& aName,
const Handle(StepVisual_HArray1OfPresentationStyleAssignment)& aStyles,
@@ -30,6 +28,7 @@ void StepVisual_StyledItem::Init(
// --- classe own fields ---
myStyles = aStyles;
myItem = aItem;
myReprItem = Handle(StepRepr_RepresentationItem)::DownCast(aItem);
// --- classe inherited fields ---
StepRepr_RepresentationItem::Init(aName);
}
@@ -39,35 +38,16 @@ void StepVisual_StyledItem::SetStyles(const Handle(StepVisual_HArray1OfPresentat
myStyles = aStyles;
}
Handle(StepVisual_HArray1OfPresentationStyleAssignment) StepVisual_StyledItem::Styles() const
{
return myStyles;
}
Handle(StepVisual_PresentationStyleAssignment) StepVisual_StyledItem::StylesValue(const Standard_Integer num) const
{
return myStyles->Value(num);
}
Standard_Integer StepVisual_StyledItem::NbStyles () const
{
if (myStyles.IsNull()) return 0;
return myStyles->Length();
}
void StepVisual_StyledItem::SetItem(const Handle(StepRepr_RepresentationItem)& aItem)
{
myItem = aItem;
myReprItem = aItem;
}
void StepVisual_StyledItem::SetItem(const StepVisual_StyledItemTarget& theItem)
{
myItem = theItem.Value();
}
Handle(StepRepr_RepresentationItem) StepVisual_StyledItem::Item() const
{
return Handle(StepRepr_RepresentationItem)::DownCast(myItem);
myReprItem = Handle(StepRepr_RepresentationItem)::DownCast(myItem);
}
StepVisual_StyledItemTarget StepVisual_StyledItem::ItemAP242() const

34
src/StepVisual/StepVisual_StyledItem.hxx
View File

@@ -40,21 +40,35 @@ public:
//! Returns a StyledItem
Standard_EXPORT StepVisual_StyledItem();
StepVisual_StyledItem()
{}
Standard_EXPORT void Init (const Handle(TCollection_HAsciiString)& aName, const Handle(StepVisual_HArray1OfPresentationStyleAssignment)& aStyles, const Handle(Standard_Transient)& aItem);
Standard_EXPORT void SetStyles (const Handle(StepVisual_HArray1OfPresentationStyleAssignment)& aStyles);
Standard_EXPORT Handle(StepVisual_HArray1OfPresentationStyleAssignment) Styles() const;
Standard_EXPORT Handle(StepVisual_PresentationStyleAssignment) StylesValue (const Standard_Integer num) const;
Standard_EXPORT Standard_Integer NbStyles() const;
const Handle(StepVisual_HArray1OfPresentationStyleAssignment)& Styles() const
{
return myStyles;
}
const Handle(StepVisual_PresentationStyleAssignment)& StylesValue
(const Standard_Integer num) const
{
return myStyles->Value(num);
}
Standard_Integer NbStyles() const
{
return myStyles.IsNull() ? 0 : myStyles->Length();
}
Standard_EXPORT void SetItem (const Handle(StepRepr_RepresentationItem)& aItem);
Standard_EXPORT Handle(StepRepr_RepresentationItem) Item() const;
const Handle(StepRepr_RepresentationItem)& Item() const
{
return myReprItem;
}
Standard_EXPORT void SetItem (const StepVisual_StyledItemTarget& aItem);
@@ -73,8 +87,10 @@ private:
Handle(StepVisual_HArray1OfPresentationStyleAssignment) myStyles;
// May be StepRepr_RepresentationItem for AP214(203) and StepVisual_StyledItemTarget for AP242
//! May be StepRepr_RepresentationItem for AP214(203) and StepVisual_StyledItemTarget for AP242
Handle(Standard_Transient) myItem;
//! This is downcasted from myItem
Handle(StepRepr_RepresentationItem) myReprItem;
};