--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/svgtopt/SVG/SVGImpl/src/SVGPathDataParser.cpp Wed Nov 03 18:56:10 2010 +0200
@@ -0,0 +1,409 @@
+/*
+* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: SVG Implementation source file
+ *
+*/
+
+
+#include "SVGPathDataParser.h"
+#include "SVGPointLexer.h"
+
+#include "GfxFloatFixPt.h"
+#include "GfxAffineTransform.h"
+#include "GfxFlatteningPathIterator.h"
+
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+void TSvgPathDataParser::ParsePathData( const TDesC& aData,
+ CGfxGeneralPath* aPath )
+ {
+
+ TRAPD( error, ParsePathDataL( aData, aPath ) );
+ if ( error != KErrNone )
+ {
+ // error processing
+ return;
+ }
+ }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+void TSvgPathDataParser::ParsePathDataL( const TDesC& aData,
+ CGfxGeneralPath* aPath )
+ {
+ TUint8 lPrevCom = '\0';
+ TFloatFixPt xy[6];
+ TInt32 rslt = ETrue;
+ TUint8 com;
+ TUint8 lPrevCom2 = '\0';
+
+ TSvgPointLexer svgplex( aData );
+
+ TFloatFixPt KZero;
+ TFloatFixPt KMinVal = 0.01f;
+ TFloatFixPt KOne( KFloatFixOne );
+
+ while ( svgplex.GetCommand ( com ) )
+ {
+
+ // Reset for command procesing
+ if( com == '\0' )
+ {
+ if( lPrevCom == 'z' ||lPrevCom == 'Z' )
+ {
+ aPath->Reset();
+ break ;
+ }
+ // As per 1.2 spec 8.3.2 The "moveto" commands
+ // If a 'moveto' is followed by multiple pairs of coordinates without explicit commands,
+ // the subsequent pairs shall be treated as implicit 'lineto' commands.
+
+ else if( lPrevCom == 'm')
+ {
+ com = 'l';
+ }
+ else if( lPrevCom == 'M' )
+ {
+ com = 'L';
+ }
+ else
+ {
+ com = lPrevCom;
+ }
+ }
+ else
+ {
+ lPrevCom = com;
+ }
+
+ switch ( com )
+ {
+ case 'M':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) );
+ if (rslt && lPrevCom2 == 'M')
+ {
+ //AJD do we want to remove this
+ // i.e. d="M 20 20 M 10 10 L 15 15
+ // has a bounding box of 5,5,10,10 or 10,10,10,10
+ //aPath->RemoveLastPathCommand();
+ }
+ if(rslt)
+ {
+ aPath->MoveToL( xy[0], xy[1], ETrue );
+ }
+ break;
+ case 'm':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) );
+ // added to change values from 0.0 to 0.01f if both the co-oridnates
+ // are having value 0.0.
+ // fix for bug "CGSR-78X9V2"
+ if(xy[0] == KZero && xy[1] == KZero)
+ {
+ xy[0] = KMinVal;
+ xy[1] = KMinVal;
+ }
+ if(rslt)
+ {
+ aPath->MoveToL( xy[0], xy[1], EFalse );
+ }
+
+ break;
+ case 'L':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) );
+ if(rslt)
+ {
+ aPath->LineToL( xy[0], xy[1], ETrue );
+ }
+ break;
+ case 'H':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) );
+ if(rslt)
+ {
+ aPath->HorizonToL( xy[0], ETrue );
+ }
+ break;
+ case 'V':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) );
+ if(rslt)
+ {
+ aPath->VertToL( xy[0], ETrue );
+ }
+ break;
+ case 'l':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) );
+ // added to change values from 0.0 to 0.01f if both the co-oridnates
+ // are having value 0.0.
+ // fix for bug "CGSR-78X9V2"
+ if(xy[0] == KZero && xy[1] == KZero)
+ {
+ xy[0] = KMinVal;
+ xy[1] = KMinVal;
+ }
+ if(rslt)
+ {
+ aPath->LineToL( xy[0], xy[1], EFalse );
+ }
+ break;
+ case 'h':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) );
+ // added to change values from 0.0 to 0.01f if both the co-oridnates
+ // are having value 0.0.
+ // fix for bug "CGSR-78X9V2"
+ if(xy[0] == KZero && xy[1] == KZero)
+ {
+ xy[0] = KMinVal;
+ xy[1] = KMinVal;
+ }
+ if(rslt)
+ {
+ aPath->HorizonToL( xy[0], EFalse );
+ }
+
+ break;
+ case 'v':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (1) );
+ // added to change values from 0.0 to 0.01f if both the co-oridnates
+ // are having value 0.0.
+ // fix for bug "CGSR-78X9V2"
+ if(xy[0] == KZero && xy[1] == KZero)
+ {
+ xy[0] = KMinVal;
+ xy[1] = KMinVal;
+ }
+ if(rslt)
+ {
+ aPath->VertToL( xy[0], EFalse );
+ }
+
+ break;
+ case 'C':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (6) );
+ if( rslt )
+ {
+ aPath->CubicToL( xy[0],
+ xy[1],
+ xy[2],
+ xy[3],
+ xy[4],
+ xy[5],
+ ETrue );
+ }
+ break;
+ case 'c':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (6) );
+ if(rslt)
+ {
+ aPath->CubicToL( xy[0],
+ xy[1],
+ xy[2],
+ xy[3],
+ xy[4],
+ xy[5],
+ EFalse );
+ }
+ break;
+ case 'S':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) );
+ if(rslt)
+ {
+ aPath->ShortCubicToL( xy[0],
+ xy[1],
+ xy[2],
+ xy[3],
+ ETrue );
+ }
+ break;
+ case 's':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) );
+ if(rslt)
+ {
+ aPath->ShortCubicToL( xy[0],
+ xy[1],
+ xy[2],
+ xy[3],
+ EFalse );
+ }
+ break;
+ case 'Q':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) );
+ if( rslt )
+ {
+ aPath->QuadToL( xy[0],
+ xy[1],
+ xy[2],
+ xy[3],
+ ETrue );
+ }
+ break;
+ case 'T':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) );
+ if(rslt)
+ {
+
+ // If there is no previous command or if
+ // the previous command was not a Q, q, T or t, the control point shall be current point.
+ if ( lPrevCom2 !='Q' && lPrevCom2 != 'q' && lPrevCom2 != 'T'
+ && lPrevCom2 != 't' )
+ {
+ aPath->QuadToLWithNoControlPoint( xy[0], xy[1] );
+ }
+ else
+ {
+ aPath->ShortQuadToL( xy[0], xy[1], ETrue );
+ }
+ }
+ break;
+ case 'q':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (4) );
+ if(rslt)
+ {
+ aPath->QuadToL( xy[0],
+ xy[1],
+ xy[2],
+ xy[3],
+ EFalse );
+ }
+ break;
+ case 't':
+ rslt = svgplex.GetNextWithNumOfPoints( xy ,TInt (2) );
+ if(xy[0] != KZero || xy[1] != KZero)
+ {
+ if(rslt)
+ {
+ aPath->ShortQuadToL( xy[0], xy[1], EFalse );
+ }
+ }
+ break;
+ case 'Z':
+ case 'z':
+ aPath->ClosePathL();
+ break;
+
+ default:
+ rslt=0;
+ break;
+
+ }// switch(lPrevCom)
+
+ if( !rslt )
+ {
+ // This is a failing path case reset.
+ aPath->Reset();
+ break ;
+ }
+
+ lPrevCom2 = com;
+ }
+ svgplex.Cleanup();
+ }
+
+//
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+void TSvgPathDataParser::ParsePointDataL( const TDesC& aData,
+ CGfxGeneralPath* aPath )
+ {
+ TSvgPointLexer svgplex( aData );
+ TBool first = ETrue;
+ while ( !svgplex.IsDone() )
+ {
+ TChar com;
+ TFloatFixPt x, y;
+ TInt32 rslt = svgplex.GetNextPoint( com, x, y );
+
+ if ( rslt != KErrNone )
+ {
+ aPath->Reset();
+ break;
+ }
+ if ( first )
+ {
+ aPath->MoveToL( x, y, ETrue );
+ first = EFalse;
+ }
+ else
+ {
+ aPath->LineToL( x, y, ETrue );
+ }
+ }
+ svgplex.Cleanup();
+ }
+
+//
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+TFloatFixPt TSvgPathDataParser::PathLengthL( CGfxGeneralPath* aPath )
+ {
+ CGfxFlatteningPathIterator* pitr;
+ TGfxAffineTransform ident;
+ pitr = CGfxFlatteningPathIterator::NewL( aPath, & ident, 3 );
+
+
+ CleanupStack::PushL( pitr );
+
+ TFloatFixPt len;
+ TFloatFixPt lx, ly;
+ TFloatFixPt dx, dy, int0x7f( KMAXFLOATFIX );
+ TFloatFixPt tmpcoords[6];
+ while ( !pitr->IsDone() )
+ {
+ switch ( pitr->CurrentSegment( tmpcoords ) )
+ {
+ case EGfxSegMoveTo:
+ lx = tmpcoords[0];
+ ly = tmpcoords[1];
+ break;
+ case EGfxSegLineTo:
+ dx = lx - tmpcoords[0];
+ dy = ly - tmpcoords[1];
+ if ( dx > int0x7f || dy > int0x7f )
+ {
+ // calculate as integer
+ TInt32 tmplen, tx, ty;
+ tx = ( TInt32 ) dx;
+ ty = ( TInt32 ) dy;
+ #ifdef SVG_FLOAT_BUILD
+ tmplen = TFloatFixPt::Sqrt(tx * tx + ty * ty);
+ #else
+ tmplen = TFloatFixPt::FixedSqrtGeneral( tx * tx + ty * ty, 0 );
+ #endif
+ len += TFloatFixPt( tmplen );
+ }
+ else
+ {
+ // calculate as TFixPt
+
+ len += TFloatFixPt::Sqrt( dx * dx + dy * dy );
+ }
+ lx = tmpcoords[0];
+ ly = tmpcoords[1];
+ break;
+ case EGfxSegClose:
+ ;// Not support multiple path length
+ break;
+ default:
+ break;
+ }
+ pitr->NextL();
+ }
+
+ CleanupStack::PopAndDestroy( 1 );
+
+ return len;
+ }