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computing bounding box of Font_BRepFont

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This commit is contained in:
apl
2015-08-12 15:27:19 +03:00
parent 0e01187e94
commit 5dfa7e9a81
2 changed files with 109 additions and 68 deletions
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129
src/AIS/AIS_Dimension.cxx
View File

@@ -84,8 +84,8 @@ namespace
static const TCollection_AsciiString THE_UNDEFINED_UNITS;
// default text margin and resolution
static const Standard_Real THE_3D_TEXT_MARGIN = 0.1;
static const unsigned int THE_2D_TEXT_RESOLUTION = 72;
static const Standard_Real THE_3D_TEXT_MARGIN = 0.1;
static const unsigned int THE_FONT_RESOLUTION = 96;
// default selection priorities
static const Standard_Integer THE_NEUTRAL_SEL_PRIORITY = 5;
@@ -409,45 +409,61 @@ Standard_Real AIS_Dimension::ValueToDisplayUnits() const
}
// =======================================================================
// function : getWidthAndHeight
// function : getLabelSizes
// purpose :
// =======================================================================
void AIS_Dimension::getLabelSizes (const TCollection_ExtendedString& theLabel,
Standard_Real& theWidth, Standard_Real& theHeight,
Standard_Real& theSymbolWidth, Standard_Real& theSymbolHeight
) const
Standard_Real& theWidth,
Standard_Real& theHeight,
Standard_Real& theSymbolWidth,
Standard_Real& theSymbolHeight) const
{
theWidth = 0;
theHeight = 0;
theSymbolWidth = 0;
theSymbolHeight = 0;
Handle(Prs3d_DimensionAspect) anAspect = myDrawer->DimensionAspect();
Handle(Prs3d_TextAspect) aTextAspect = myDrawer->DimensionAspect()->TextAspect();
Standard_Real aFontHeight = aTextAspect->Height();
const Handle(Prs3d_TextAspect)& aTextAspect = myDrawer->DimensionAspect()->TextAspect();
const Handle(Graphic3d_AspectText3d)& anAspectText = aTextAspect->Aspect();
Quantity_Color aColor;
Standard_CString aFontName;
Standard_Real anExpFactor, aSpace;
anAspectText->Values (aColor, aFontName, anExpFactor, aSpace);
aTextAspect->Aspect()->Values (aColor, aFontName, anExpFactor, aSpace);
// Initialize font with specific settings.
Font_FTFont aFont;
aFont.Init (aFontName, anAspectText->GetTextFontAspect(), aTextAspect->Height(), 96);
Font_FTFont::Rect aBndBox;
if (myDisplaySpecialSymbol != AIS_DSS_No)
NCollection_String aText ((Standard_Utf16Char*) theLabel.ToExtString());
NCollection_String aSymbol;
if (DisplaySpecialSymbol() != AIS_DSS_No)
{
const NCollection_String aString ((Standard_Utf16Char*) TCollection_ExtendedString (mySpecialSymbol).ToExtString());
aBndBox = aFont.BoundingBox (aString.ToCString(), Graphic3d_HTA_LEFT, Graphic3d_VTA_TOP);
theSymbolWidth = aBndBox.Width();
theSymbolHeight = aBndBox.Height();
aSymbol.FromUnicode ((Standard_Utf16Char*) TCollection_ExtendedString (mySpecialSymbol).ToExtString());
}
// Compute bounding box for the main text of label
const NCollection_String aString ((Standard_Utf16Char*) theLabel.ToExtString());
aBndBox = aFont.BoundingBox (aString.ToCString(), Graphic3d_HTA_LEFT, Graphic3d_VTA_TOP);
theWidth = aBndBox.Width();
theHeight = aBndBox.Height();
Font_FTFont::Rect aTextBox;
Font_FTFont::Rect aSymbolBox;
if (!anAspect->IsText3d())
{
Font_FTFont aFont;
aFont.Init (aFontName,
aTextAspect->Aspect()->GetTextFontAspect(),
static_cast<Standard_Integer> (aFontHeight),
THE_FONT_RESOLUTION);
aTextBox = aFont.BoundingBox (aText, Graphic3d_HTA_LEFT, Graphic3d_VTA_TOP);
if (!aSymbol.IsEmpty())
{
aSymbolBox = aFont.BoundingBox (aSymbol, Graphic3d_HTA_LEFT, Graphic3d_VTA_TOP);
}
}
else
{
Font_BRepFont aFont (aFontName, aTextAspect->Aspect()->GetTextFontAspect(), aFontHeight);
aTextBox = aFont.BoundingBox (aText);
if (!aSymbol.IsEmpty())
{
aSymbolBox = aFont.BoundingBox (aSymbol);
}
}
theWidth = aTextBox.Width();
theHeight = aTextBox.Height();
theSymbolWidth = aSymbolBox.Width();
theSymbolHeight = aSymbolBox.Height();
}
//=======================================================================
@@ -528,19 +544,14 @@ void AIS_Dimension::DrawText (const Handle(Prs3d_Presentation)& thePresentation,
Font_FontAspect aFontAspect = anAspectText3d->GetTextFontAspect();
const Standard_Real aFontHeight = aTextAspect->Height();
Font_FTFont aFont;
aFont.Init (aFontName, anAspectText3d->GetTextFontAspect(), aFontHeight, 96);
const Standard_Real aHeightOfLine = aFont.LineSpacing();
// Text sizes
Standard_Real aWidth = 0.0;
Standard_Real aWidth = 0.0;
Standard_Real aHeight = 0.0;
Standard_Real aSymbolWidth = 0.0;
Standard_Real aSymbolHeight = 0.0;
getLabelSizes (theText, aWidth, aHeight, aSymbolWidth, aSymbolHeight);
aWidth += aSymbolWidth;
// Compute label offsets
// Compute label offsets
Standard_Real aMarginSize = aFontHeight * THE_3D_TEXT_MARGIN;
Standard_Real aCenterHOffset = 0.0;
Standard_Real aCenterVOffset = 0.0;
@@ -563,16 +574,17 @@ void AIS_Dimension::DrawText (const Handle(Prs3d_Presentation)& thePresentation,
aSymbolShape = aFont.RenderText (anUTFSymbol);
}
// Formating text position in XOY plane
Standard_Integer aHLabelPos = theLabelPosition & LabelPosition_HMask;
switch (aHLabelPos)
{
case LabelPosition_HCenter : aCenterHOffset = 0.0; break;
case LabelPosition_Right : aCenterHOffset = aWidth / 2.0 + aMarginSize; break;
case LabelPosition_Right : aCenterHOffset = aWidth / 2.0 + aMarginSize; break;
case LabelPosition_Left : aCenterHOffset = -aWidth / 2.0 - aMarginSize; break;
}
const Standard_Real aHeightOfLine = aFont.LineSpacing();
switch (aVLabelPos)
{
case LabelPosition_FirstLine:
@@ -643,8 +655,6 @@ void AIS_Dimension::DrawText (const Handle(Prs3d_Presentation)& thePresentation,
aTextPlaneTrsf.SetTransformation (aTextCoordSystem, gp_Ax3 (gp::XOY()));
aTextShape.Move (aTextPlaneTrsf);
if (!aSymbolShape.IsNull())
{
aSymbolVOffset += aYalign - aHeight / 2.0;
@@ -655,7 +665,6 @@ void AIS_Dimension::DrawText (const Handle(Prs3d_Presentation)& thePresentation,
aSymbolShape.Move (aTextPlaneTrsf);
}
// Set text flipping anchors
gp_Trsf aCenterOffsetTrsf;
gp_Pnt aCenterOffset (aCenterHOffset, aCenterVOffset, 0.0);
@@ -707,25 +716,18 @@ void AIS_Dimension::DrawText (const Handle(Prs3d_Presentation)& thePresentation,
gp_Pnt aTextPos = theTextPos;
Font_FTFont aFont;
aFont.Init (aFontName,
anAspectText3d->GetTextFontAspect(),
static_cast<Standard_Integer>(aFontHeight),
THE_FONT_RESOLUTION);
const Standard_Real aHeightOfLine = aFont.LineSpacing();
switch (aVLabelPos)
{
case LabelPosition_FirstLine:
{
if (myTypeOfLabel == TOL_Text && aHeight > aHeightOfLine)
{
//aTextPos.SetY (aTextPos.Y() + aHeight / 2.0 - aHeightOfLine);
}
break;
}
case LabelPosition_LastLine:
{
if (myTypeOfLabel == TOL_Text && aHeight > aHeightOfLine)
{
//aTextPos.SetY (aTextPos.Y() + aHeightOfLine - aHeight / 2.0);
}
break;
}
case LabelPosition_VCenter : break;
case LabelPosition_FirstLine: break;
case LabelPosition_LastLine : break;
case LabelPosition_VCenter : break;
case LabelPosition_Above:
{
if (myTypeOfLabel == TOL_Text && aHeight > aHeightOfLine)
@@ -794,11 +796,6 @@ void AIS_Dimension::DrawExtension (const Handle(Prs3d_Presentation)& thePresenta
? (myTextDir*theExtensionDir < 0 ? -myTextDir : myTextDir)
: theExtensionDir;
Standard_Boolean isShortLine = !myDrawer->DimensionAspect()->IsText3d()
|| theLabelPosition & LabelPosition_VCenter;
// Compute graphical primitives and sensitives for extension line
gp_Pnt anExtStart = theExtensionStart;
gp_Pnt anExtEnd = !hasLabel || !(theLabelPosition & LabelPosition_Above || theLabelPosition & LabelPosition_Below)
@@ -834,7 +831,6 @@ void AIS_Dimension::DrawExtension (const Handle(Prs3d_Presentation)& thePresenta
return;
}
// Add graphical primitives
Handle(Graphic3d_ArrayOfSegments) anExtPrimitive = new Graphic3d_ArrayOfSegments ((hasLabel && myLeaderSegmentLength > 0 && myIsTextAligned) ? 4 : 2);
anExtPrimitive->AddVertex (anExtStart);
@@ -846,9 +842,6 @@ void AIS_Dimension::DrawExtension (const Handle(Prs3d_Presentation)& thePresenta
anExtPrimitive->AddVertex (aSegmentPoint);
}
// Add selection primitives
SelectionGeometry::Curve& aSensitiveCurve = mySelectionGeom.NewCurve();
aSensitiveCurve.Append (anExtStart);

48
src/Font/Font_BRepFont.cxx
View File

@@ -516,3 +516,51 @@ TopoDS_Shape Font_BRepFont::RenderText (const NCollection_String& theString)
}
return aResult;
}
// =======================================================================
// function : BoundingBox
// purpose :
// =======================================================================
Font_FTFont::Rect Font_BRepFont::BoundingBox (const NCollection_String& theString)
{
Rect aBox;
aBox.Left = 0.f;
aBox.Right = 0.f;
aBox.Bottom = 0.f;
aBox.Top = static_cast<float> (Ascender());
Standard_Integer aLine = 0;
Standard_Real aCurrWidth = 0.;
for (NCollection_Utf8Iter anIter = theString.Iterator(); *anIter != 0;)
{
const Standard_Utf32Char aCharCurr = *anIter;
const Standard_Utf32Char aCharNext = *++anIter;
if (aCharCurr == '\x0D' // CR (carriage return)
|| aCharCurr == '\a' // BEL (alarm)
|| aCharCurr == '\f' // FF (form feed) NP (new page)
|| aCharCurr == '\b' // BS (backspace)
|| aCharCurr == '\v') // VT (vertical tab)
{
continue; // skip unsupported carriage control codes
}
else if (aCharCurr == ' ' || aCharCurr == '\t')
{
aCurrWidth += AdvanceX (aCharCurr, aCharNext);
continue;
}
else if (aCharCurr == '\n')
{
aBox.Right = Max (aBox.Right, static_cast<float> (aCurrWidth));
aCurrWidth = 0;
++aLine;
continue;
}
aCurrWidth += AdvanceX (aCharCurr, aCharNext);
}
aBox.Right = Max (aBox.Right, static_cast<float> (aCurrWidth));
aBox.Bottom = aBox.Top - static_cast<float> (LineSpacing() * Standard_Real (aLine + 1));
return aBox;
}