--- /dev/null
+// Created on: 2013-09-16
+// Copyright (c) 2013 OPEN CASCADE SAS
+//
+// The content of this file is subject to the Open CASCADE Technology Public
+// License Version 6.5 (the "License"). You may not use the content of this file
+// except in compliance with the License. Please obtain a copy of the License
+// at http://www.opencascade.org and read it completely before using this file.
+//
+// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
+// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+//
+// The Original Code and all software distributed under the License is
+// distributed on an "AS IS" basis, without warranty of any kind, and the
+// Initial Developer hereby disclaims all such warranties, including without
+// limitation, any warranties of merchantability, fitness for a particular
+// purpose or non-infringement. Please see the License for the specific terms
+// and conditions governing the rights and limitations under the License.
+
+#include <Font_BRepFont.hxx>
+
+#include <BRep_Tool.hxx>
+#include <BRepBuilderAPI_MakeFace.hxx>
+#include <BRepBuilderAPI_MakeWire.hxx>
+#include <BRepLib_MakeEdge.hxx>
+#include <GCE2d_MakeSegment.hxx>
+#include <GC_MakeSegment.hxx>
+#include <Geom_BezierCurve.hxx>
+#include <Geom_BSplineCurve.hxx>
+#include <Geom_Plane.hxx>
+#include <Geom2d_BezierCurve.hxx>
+#include <Geom2d_BSplineCurve.hxx>
+#include <Geom2d_Line.hxx>
+#include <GeomAPI.hxx>
+#include <GeomAdaptor_HSurface.hxx>
+#include <GeomLib.hxx>
+#include <gp_Pln.hxx>
+#include <ShapeBuild_ReShape.hxx>
+#include <ShapeFix_Edge.hxx>
+#include <ShapeFix_Wire.hxx>
+#include <TColGeom2d_HSequenceOfBoundedCurve.hxx>
+#include <TCollection_AsciiString.hxx>
+#include <TCollection_HAsciiString.hxx>
+#include <TopExp.hxx>
+#include <TopExp_Explorer.hxx>
+#include <TopoDS.hxx>
+#include <TopoDS_Compound.hxx>
+#include <TopoDS_Vertex.hxx>
+
+#include FT_OUTLINE_H
+
+IMPLEMENT_STANDARD_HANDLE (Font_BRepFont, Font_FTFont)
+IMPLEMENT_STANDARD_RTTIEXT(Font_BRepFont, Font_FTFont)
+
+namespace
+{
+ // pre-defined font rendering options
+ static const unsigned int THE_FONT_SIZE = 72;
+ static const unsigned int THE_RESOLUTION_DPI = 4800;
+
+ // compute scaling factor for specified font size
+ inline Standard_Real getScale (const Standard_Real theSize)
+ {
+ return theSize / Standard_Real(THE_FONT_SIZE) * 72.0 / Standard_Real(THE_RESOLUTION_DPI);
+ }
+
+};
+
+// =======================================================================
+// function : Constructor
+// purpose :
+// =======================================================================
+Font_BRepFont::Font_BRepFont ()
+: myPrecision (Precision::Confusion()),
+ myScaleUnits (1.0),
+ myIsCompositeCurve (Standard_False),
+ my3Poles (1, 3),
+ my4Poles (1, 4)
+{
+ init();
+}
+
+// =======================================================================
+// function : init
+// purpose :
+// =======================================================================
+void Font_BRepFont::init()
+{
+ mySurface = new Geom_Plane (gp_Pln (gp::XOY()));
+ myCurve2dAdaptor = new Geom2dAdaptor_HCurve();
+ Handle(GeomAdaptor_HSurface) aSurfAdaptor = new GeomAdaptor_HSurface (mySurface);
+ myCurvOnSurf.Load (aSurfAdaptor);
+
+ myFixer.FixWireMode() = 1;
+ myFixer.FixOrientationMode() = 1;
+ myFixer.FixSplitFaceMode() = 1; // some glyphs might be composed from several faces
+ Handle(ShapeFix_Wire) aWireFixer = myFixer.FixWireTool();
+ aWireFixer->FixConnectedMode() = 1;
+ aWireFixer->ClosedWireMode() = Standard_True;
+ Handle(ShapeBuild_ReShape) aContext = new ShapeBuild_ReShape();
+ myFixer.SetContext (aContext);
+}
+
+// =======================================================================
+// function : Constructor
+// purpose :
+// =======================================================================
+Font_BRepFont::Font_BRepFont (const NCollection_String& theFontPath,
+ const Standard_Real theSize)
+: myPrecision (Precision::Confusion()),
+ myScaleUnits (1.0),
+ myIsCompositeCurve (Standard_False),
+ my3Poles (1, 3),
+ my4Poles (1, 4)
+{
+ init();
+ if (theSize <= myPrecision * 100.0)
+ {
+ return;
+ }
+
+ myScaleUnits = getScale (theSize);
+ Font_FTFont::Init (theFontPath, THE_FONT_SIZE, THE_RESOLUTION_DPI);
+}
+
+// =======================================================================
+// function : Constructor
+// purpose :
+// =======================================================================
+Font_BRepFont::Font_BRepFont (const NCollection_String& theFontName,
+ const Font_FontAspect theFontAspect,
+ const Standard_Real theSize)
+: myPrecision (Precision::Confusion()),
+ myScaleUnits (1.0),
+ myIsCompositeCurve (Standard_False),
+ my3Poles (1, 3),
+ my4Poles (1, 4)
+{
+ init();
+ if (theSize <= myPrecision * 100.0)
+ {
+ return;
+ }
+
+ myScaleUnits = getScale (theSize);
+ Font_FTFont::Init (theFontName, theFontAspect, THE_FONT_SIZE, THE_RESOLUTION_DPI);
+}
+
+// =======================================================================
+// function : Release
+// purpose :
+// =======================================================================
+void Font_BRepFont::Release()
+{
+ myCache.Clear();
+ Font_FTFont::Release();
+}
+
+// =======================================================================
+// function : SetCompositeCurveMode
+// purpose :
+// =======================================================================
+void Font_BRepFont::SetCompositeCurveMode (const Standard_Boolean theToConcatenate)
+{
+ if (myIsCompositeCurve != theToConcatenate)
+ {
+ myIsCompositeCurve = theToConcatenate;
+ myCache.Clear();
+ }
+}
+
+// =======================================================================
+// function : Init
+// purpose :
+// =======================================================================
+bool Font_BRepFont::Init (const NCollection_String& theFontPath,
+ const Standard_Real theSize)
+{
+ if (theSize <= myPrecision * 100.0)
+ {
+ return false;
+ }
+
+ myScaleUnits = getScale (theSize);
+ return Font_FTFont::Init (theFontPath, THE_FONT_SIZE, THE_RESOLUTION_DPI);
+}
+
+// =======================================================================
+// function : Init
+// purpose :
+// =======================================================================
+bool Font_BRepFont::Init (const NCollection_String& theFontName,
+ const Font_FontAspect theFontAspect,
+ const Standard_Real theSize)
+{
+ if (theSize <= myPrecision * 100.0)
+ {
+ return false;
+ }
+
+ myScaleUnits = getScale (theSize);
+ return Font_FTFont::Init (theFontName, theFontAspect, THE_FONT_SIZE, THE_RESOLUTION_DPI);
+}
+
+// =======================================================================
+// function : RenderGlyph
+// purpose :
+// =======================================================================
+TopoDS_Shape Font_BRepFont::RenderGlyph (const Standard_Utf32Char& theChar)
+{
+ TopoDS_Shape aShape;
+ Standard_Mutex::Sentry aSentry (myMutex);
+ renderGlyph (theChar, aShape);
+ return aShape;
+}
+
+// =======================================================================
+// function : to3d
+// purpose :
+// =======================================================================
+bool Font_BRepFont::to3d (const Handle(Geom2d_Curve) theCurve2d,
+ const GeomAbs_Shape theContinuity,
+ Handle(Geom_Curve)& theCurve3d)
+{
+ Standard_Real aMaxDeviation = 0.0;
+ Standard_Real anAverDeviation = 0.0;
+ myCurve2dAdaptor->ChangeCurve2d().Load (theCurve2d);
+ myCurvOnSurf.Load (myCurve2dAdaptor);
+ GeomLib::BuildCurve3d (myPrecision, myCurvOnSurf,
+ myCurve2dAdaptor->FirstParameter(), myCurve2dAdaptor->LastParameter(),
+ theCurve3d, aMaxDeviation, anAverDeviation, theContinuity);
+ return !theCurve3d.IsNull();
+}
+
+// =======================================================================
+// function : renderGlyph
+// purpose :
+// =======================================================================
+Standard_Boolean Font_BRepFont::renderGlyph (const Standard_Utf32Char theChar,
+ TopoDS_Shape& theShape)
+{
+ theShape.Nullify();
+ if (!loadGlyph (theChar)
+ || myFTFace->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
+ {
+ return Standard_False;
+ }
+ else if (myCache.Find (theChar, theShape))
+ {
+ return !theShape.IsNull();
+ }
+
+ TopLoc_Location aLoc;
+ TopoDS_Face aFaceDraft;
+ myBuilder.MakeFace (aFaceDraft, mySurface, myPrecision);
+ FT_Outline& anOutline = myFTFace->glyph->outline;
+ // Get orientation is useless since it doesn't retrieve any in-font information and just computes orientation.
+ // Because it fails in some cases - leave this to ShapeFix.
+ //const FT_Orientation anOrient = FT_Outline_Get_Orientation (&anOutline);
+ for (short aContour = 0, aStartIndex = 0; aContour < anOutline.n_contours; ++aContour)
+ {
+ const FT_Vector* aPntList = &anOutline.points[aStartIndex];
+ const char* aTags = &anOutline.tags[aStartIndex];
+ const short anEndIndex = anOutline.contours[aContour];
+ const short aPntsNb = (anEndIndex - aStartIndex) + 1;
+ aStartIndex = anEndIndex + 1;
+ if (aPntsNb < 3)
+ {
+ // closed contour can not be constructed from < 3 points
+ continue;
+ }
+
+ BRepBuilderAPI_MakeWire aWireMaker;
+
+ gp_XY aPntPrev;
+ gp_XY aPntCurr = readFTVec (aPntList[aPntsNb - 1]);
+ gp_XY aPntNext = readFTVec (aPntList[0]);
+
+ Standard_Integer aLinePnts = (FT_CURVE_TAG(aTags[aPntsNb - 1]) == FT_Curve_Tag_On) ? 1 : 0;
+ gp_XY aPntLine1 = aPntCurr;
+
+ // see http://freetype.sourceforge.net/freetype2/docs/glyphs/glyphs-6.html
+ // for a full description of FreeType tags.
+ for (short aPntId = 0; aPntId < aPntsNb; ++aPntId)
+ {
+ aPntPrev = aPntCurr;
+ aPntCurr = aPntNext;
+ aPntNext = readFTVec (aPntList[(aPntId + 1) % aPntsNb]);
+
+ // process tags
+ if (FT_CURVE_TAG(aTags[aPntId]) == FT_Curve_Tag_On)
+ {
+ if (aLinePnts < 1)
+ {
+ aPntLine1 = aPntCurr;
+ aLinePnts = 1;
+ continue;
+ }
+
+ const gp_XY aDirVec = aPntCurr - aPntLine1;
+ const Standard_Real aLen = aDirVec.Modulus();
+ if (aLen <= myPrecision)
+ {
+ aPntLine1 = aPntCurr;
+ aLinePnts = 1;
+ continue;
+ }
+
+ if (myIsCompositeCurve)
+ {
+ Handle(Geom2d_TrimmedCurve) aLine = GCE2d_MakeSegment (gp_Pnt2d (aPntLine1), gp_Pnt2d (aPntCurr));
+ myConcatMaker.Add (aLine, myPrecision);
+ }
+ else
+ {
+ Handle(Geom_Curve) aCurve3d;
+ Handle(Geom2d_Line) aCurve2d = new Geom2d_Line (gp_Pnt2d (aPntLine1), gp_Dir2d (aDirVec));
+ if (to3d (aCurve2d, GeomAbs_C1, aCurve3d))
+ {
+ TopoDS_Edge anEdge = BRepLib_MakeEdge (aCurve3d, 0.0, aLen);
+ myBuilder.UpdateEdge (anEdge, aCurve2d, mySurface, aLoc, myPrecision);
+ aWireMaker.Add (anEdge);
+ }
+ }
+ aPntLine1 = aPntCurr;
+ }
+ else if (FT_CURVE_TAG(aTags[aPntId]) == FT_Curve_Tag_Conic)
+ {
+ aLinePnts = 0;
+ gp_XY aPntPrev2 = aPntPrev;
+ gp_XY aPntNext2 = aPntNext;
+
+ // previous point is either the real previous point (an "on" point),
+ // or the midpoint between the current one and the previous "conic off" point
+ if (FT_CURVE_TAG(aTags[(aPntId - 1 + aPntsNb) % aPntsNb]) == FT_Curve_Tag_Conic)
+ {
+ aPntPrev2 = (aPntCurr + aPntPrev) * 0.5;
+ }
+
+ // next point is either the real next point or the midpoint
+ if (FT_CURVE_TAG(aTags[(aPntId + 1) % aPntsNb]) == FT_Curve_Tag_Conic)
+ {
+ aPntNext2 = (aPntCurr + aPntNext) * 0.5;
+ }
+
+ my3Poles.SetValue (1, aPntPrev2);
+ my3Poles.SetValue (2, aPntCurr);
+ my3Poles.SetValue (3, aPntNext2);
+ Handle(Geom2d_BezierCurve) aBezierArc = new Geom2d_BezierCurve (my3Poles);
+ if (myIsCompositeCurve)
+ {
+ myConcatMaker.Add (aBezierArc, myPrecision);
+ }
+ else
+ {
+ Handle(Geom_Curve) aCurve3d;
+ if (to3d (aBezierArc, GeomAbs_C1, aCurve3d))
+ {
+ TopoDS_Edge anEdge = BRepLib_MakeEdge (aCurve3d);
+ myBuilder.UpdateEdge (anEdge, aBezierArc, mySurface, aLoc, myPrecision);
+ aWireMaker.Add (anEdge);
+ }
+ }
+ }
+ else if (FT_CURVE_TAG(aTags[aPntId]) == FT_Curve_Tag_Cubic
+ && FT_CURVE_TAG(aTags[(aPntId + 1) % aPntsNb]) == FT_Curve_Tag_Cubic)
+ {
+ aLinePnts = 0;
+ my4Poles.SetValue (1, aPntPrev);
+ my4Poles.SetValue (2, aPntCurr);
+ my4Poles.SetValue (3, aPntNext);
+ my4Poles.SetValue (4, gp_Pnt2d(readFTVec (aPntList[(aPntId + 2) % aPntsNb])));
+ Handle(Geom2d_BezierCurve) aBezier = new Geom2d_BezierCurve (my4Poles);
+ if (myIsCompositeCurve)
+ {
+ myConcatMaker.Add (aBezier, myPrecision);
+ }
+ else
+ {
+ Handle(Geom_Curve) aCurve3d;
+ if (to3d (aBezier, GeomAbs_C1, aCurve3d))
+ {
+ TopoDS_Edge anEdge = BRepLib_MakeEdge (aCurve3d);
+ myBuilder.UpdateEdge (anEdge, aBezier, mySurface, aLoc, myPrecision);
+ aWireMaker.Add (anEdge);
+ }
+ }
+ }
+ }
+
+ if (myIsCompositeCurve)
+ {
+ Handle(Geom2d_BSplineCurve) aDraft2d = myConcatMaker.BSplineCurve();
+ if (aDraft2d.IsNull())
+ {
+ continue;
+ }
+
+ const gp_Pnt2d aFirstPnt = aDraft2d->StartPoint();
+ const gp_Pnt2d aLastPnt = aDraft2d->EndPoint();
+ if (!aFirstPnt.IsEqual (aLastPnt, myPrecision))
+ {
+ Handle(Geom2d_TrimmedCurve) aLine = GCE2d_MakeSegment (aLastPnt, aFirstPnt);
+ myConcatMaker.Add (aLine, myPrecision);
+ }
+
+ Handle(Geom2d_BSplineCurve) aCurve2d = myConcatMaker.BSplineCurve();
+ Handle(Geom_Curve) aCurve3d;
+ if (to3d (aCurve2d, GeomAbs_C0, aCurve3d))
+ {
+ TopoDS_Edge anEdge = BRepLib_MakeEdge (aCurve3d);
+ myBuilder.UpdateEdge (anEdge, aCurve2d, mySurface, aLoc, myPrecision);
+ aWireMaker.Add (anEdge);
+ }
+ myConcatMaker.Clear();
+ }
+ else
+ {
+ if (!aWireMaker.IsDone())
+ {
+ continue;
+ }
+
+ TopoDS_Vertex aFirstV, aLastV;
+ TopExp::Vertices (aWireMaker.Wire(), aFirstV, aLastV);
+ gp_Pnt aFirstPoint = BRep_Tool::Pnt (aFirstV);
+ gp_Pnt aLastPoint = BRep_Tool::Pnt (aLastV);
+ if (!aFirstPoint.IsEqual (aLastPoint, myPrecision))
+ {
+ aWireMaker.Add (BRepLib_MakeEdge (aFirstV, aLastV));
+ }
+ }
+
+ if (!aWireMaker.IsDone())
+ {
+ continue;
+ }
+
+ TopoDS_Wire aWireDraft = aWireMaker.Wire();
+ //if (anOrient == FT_ORIENTATION_FILL_LEFT)
+ //{
+ // According to the TrueType specification, clockwise contours must be filled
+ aWireDraft.Reverse();
+ //}
+ myBuilder.Add (aFaceDraft, aWireDraft);
+ }
+
+ myFixer.Init (aFaceDraft);
+ myFixer.Perform();
+ theShape = myFixer.Result();
+ if (!theShape.IsNull()
+ && theShape.ShapeType() != TopAbs_FACE)
+ {
+ // shape fix can not fix orientation within the single call
+ TopoDS_Compound aComp;
+ myBuilder.MakeCompound (aComp);
+ for (TopExp_Explorer aFaceIter (theShape, TopAbs_FACE); aFaceIter.More(); aFaceIter.Next())
+ {
+ TopoDS_Face aFace = TopoDS::Face (aFaceIter.Current());
+ myFixer.Init (aFace);
+ myFixer.Perform();
+ myBuilder.Add (aComp, myFixer.Result());
+ }
+ theShape = aComp;
+ }
+
+ myCache.Bind (theChar, theShape);
+ return !theShape.IsNull();
+}
+
+// =======================================================================
+// function : RenderText
+// purpose :
+// =======================================================================
+TopoDS_Shape Font_BRepFont::RenderText (const NCollection_String& theString)
+{
+ if (theString.IsEmpty())
+ {
+ return TopoDS_Shape();
+ }
+
+ gp_Trsf aTrsf;
+ gp_XYZ aPen;
+ Standard_Integer aLine = 0;
+ TopoDS_Shape aGlyphShape;
+ TopoDS_Compound aResult;
+ myBuilder.MakeCompound (aResult);
+ Standard_Mutex::Sentry aSentry (myMutex);
+ 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')
+ {
+ aPen.SetX (aPen.X() + AdvanceX (aCharCurr, aCharNext));
+ continue;
+ }
+ else if (aCharCurr == '\n')
+ {
+ ++aLine;
+ aPen.SetX (0.0);
+ aPen.SetY (-Standard_Real(aLine) * LineSpacing());
+ continue;
+ }
+
+ if (renderGlyph (aCharCurr, aGlyphShape))
+ {
+ aTrsf.SetTranslation (gp_Vec (aPen));
+ aGlyphShape.Move (aTrsf);
+ myBuilder.Add (aResult, aGlyphShape);
+ }
+ aPen.SetX (aPen.X() + AdvanceX (aCharCurr, aCharNext));
+ }
+ return aResult;
+}
projects / occt.git / blobdiff