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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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fpvectorial-svg: Implements support for reading PNG raster images inside SVG
git-svn-id: trunk@42309 -
This commit is contained in:
sekelsenmat
parent
fe0a06d109
commit
9230dae80f
@ -26,6 +26,7 @@ uses
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{$ifdef USE_LCL_CANVAS}
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Graphics, LCLIntf, LCLType,
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{$endif}
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base64,
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fpvectorial, fpimage, zstream;
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type
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@ -65,8 +66,11 @@ function SolveNumericallyAngle(ANumericalEquation: TNumericalEquation;
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// Compression/Decompression
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procedure DeflateBytes(var ASource, ADest: TFPVUByteArray);
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procedure DeflateStream(ASource, ADest: TStream);
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// ASCII85
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// Binary to Text encodings
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procedure DecodeASCII85(ASource: string; var ADest: TFPVUByteArray);
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procedure DecodeBase64(ASource: string; ADest: TStream);
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// Byte array to stream conversion
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procedure ByteArrayToStream(ASource: TFPVUByteArray; ADest: TStream);
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// Debug
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procedure FPVUDebug(AStr: string);
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procedure FPVUDebugLn(AStr: string);
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@ -577,6 +581,29 @@ begin
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end;
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end;
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procedure DecodeBase64(ASource: string; ADest: TStream);
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var
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lSourceStream: TStringStream;
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lDecoder: TBase64DecodingStream;
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begin
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lSourceStream := TStringStream.Create(ASource);
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lDecoder := TBase64DecodingStream.Create(lSourceStream);
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try
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ADest.CopyFrom(lDecoder, lDecoder.Size);
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finally
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lDecoder.Free;
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lSourceStream.Free;
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end;
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end;
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procedure ByteArrayToStream(ASource: TFPVUByteArray; ADest: TStream);
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var
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i: Integer;
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begin
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for i := 0 to Length(ASource)-1 do
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ADest.WriteByte(ASource[i]);
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end;
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procedure FPVUDebug(AStr: string);
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begin
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FPVDebugBuffer := FPVDebugBuffer + AStr;
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@ -16,6 +16,8 @@ interface
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uses
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Classes, SysUtils, math,
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fpimage, fpcanvas, laz2_xmlread, laz2_dom, fgl,
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// image data formats
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fpreadpng,
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fpvectorial, fpvutils, lazutf8, TypInfo;
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type
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@ -78,10 +80,11 @@ type
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function ReadSVGPenStyleWithKeyAndValue(AKey, AValue: string; ADestEntity: TvEntityWithPen): TvSetPenBrushAndFontElements;
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function ReadSVGBrushStyleWithKeyAndValue(AKey, AValue: string; ADestEntity: TvEntityWithPenAndBrush): TvSetPenBrushAndFontElements;
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function ReadSVGFontStyleWithKeyAndValue(AKey, AValue: string; ADestEntity: TvEntityWithPenBrushAndFont): TvSetPenBrushAndFontElements;
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function ReadSVGGeneralStyleWithKeyAndValue(AKey, AValue: string; ADestEntity: TvEntityWithPen): TvSetPenBrushAndFontElements;
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function ReadSVGGeneralStyleWithKeyAndValue(AKey, AValue: string; ADestEntity: TvEntity): TvSetPenBrushAndFontElements;
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function IsAttributeFromStyle(AStr: string): Boolean;
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procedure ApplyLayerStyles(ADestEntity: TvEntity);
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function ReadSpaceSeparatedFloats(AInput: string): TDoubleArray;
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function ReadSpaceSeparatedFloats(AInput: string; AOtherSeparators: string): TDoubleArray;
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function ReadSpaceSeparatedStrings(AInput: string; AOtherSeparators: string): TStringList;
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procedure ReadSVGTransformationMatrix(AMatrix: string; out AA, AB, AC, AD, AE, AF: Double);
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//
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procedure ReadDefsFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument);
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@ -89,6 +92,7 @@ type
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function ReadEntityFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument): TvEntity;
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function ReadCircleFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument): TvEntity;
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function ReadEllipseFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument): TvEntity;
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function ReadImageFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument): TvEntity;
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procedure ReadLayerFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument);
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function ReadLineFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument): TvEntity;
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function ReadPathFromNode(ANode: TDOMNode; AData: TvVectorialPage; ADoc: TvVectorialDocument): TvEntity;
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@ -923,7 +927,7 @@ begin
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end;
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function TvSVGVectorialReader.ReadSVGGeneralStyleWithKeyAndValue(AKey,
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AValue: string; ADestEntity: TvEntityWithPen): TvSetPenBrushAndFontElements;
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AValue: string; ADestEntity: TvEntity): TvSetPenBrushAndFontElements;
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var
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// transform
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MA, MB, MC, MD, ME, MF: Double;
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@ -949,7 +953,7 @@ begin
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begin
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lFunctionName := lTokenizer.Tokens.Items[i].StrValue;
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lParamStr := lTokenizer.Tokens.Items[i+1].StrValue;
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lMatrixElements := ReadSpaceSeparatedFloats(lParamStr);
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lMatrixElements := ReadSpaceSeparatedFloats(lParamStr, ',');
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if lFunctionName = 'matrix' then
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begin
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@ -1024,17 +1028,25 @@ begin
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end;
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end;
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function TvSVGVectorialReader.ReadSpaceSeparatedFloats(AInput: string
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): TDoubleArray;
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function TvSVGVectorialReader.ReadSpaceSeparatedFloats(AInput: string;
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AOtherSeparators: string): TDoubleArray;
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var
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lStrings: TStringList;
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lInputStr: string;
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lMatrixElements: array of Double;
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i: Integer;
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begin
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lStrings := TStringList.Create;
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try
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lStrings.Delimiter := ' ';
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lStrings.DelimitedText := AInput;
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// now other separator too
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lInputStr := AInput;
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for i := 1 to Length(AOtherSeparators) do
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begin
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lInputStr := StringReplace(lInputStr, AOtherSeparators[i], ' ', [rfReplaceAll]);
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end;
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//
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lStrings.DelimitedText := lInputStr;
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SetLength(lMatrixElements, lStrings.Count);
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for i := 0 to lStrings.Count-1 do
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begin
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@ -1047,6 +1059,24 @@ begin
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end;
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end;
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function TvSVGVectorialReader.ReadSpaceSeparatedStrings(AInput: string;
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AOtherSeparators: string): TStringList;
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var
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i: Integer;
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lInputStr: String;
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begin
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Result := TStringList.Create;
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Result.Delimiter := ' ';
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// now other separator too
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lInputStr := AInput;
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for i := 1 to Length(AOtherSeparators) do
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begin
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lInputStr := StringReplace(lInputStr, AOtherSeparators[i], ' ', [rfReplaceAll]);
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end;
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//
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Result.DelimitedText := lInputStr;
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end;
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// transform="matrix(0.860815 0 -0 1.07602 354.095 482.177)"=>matrix(a, b, c, d, e, f)
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// See http://apike.ca/prog_svg_transform.html
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procedure TvSVGVectorialReader.ReadSVGTransformationMatrix(
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@ -1054,7 +1084,7 @@ procedure TvSVGVectorialReader.ReadSVGTransformationMatrix(
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var
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lMatrixElements: array of Double;
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begin
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lMatrixElements := ReadSpaceSeparatedFloats(AMatrix);
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lMatrixElements := ReadSpaceSeparatedFloats(AMatrix, '');
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AA := lMatrixElements[0];
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AB := lMatrixElements[1];
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@ -1177,6 +1207,7 @@ begin
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'circle': Result := ReadCircleFromNode(ANode, AData, ADoc);
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'ellipse': Result := ReadEllipseFromNode(ANode, AData, ADoc);
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'g': ReadLayerFromNode(ANode, AData, ADoc);
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'image': Result := ReadImageFromNode(ANode, AData, ADoc);
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'line': Result := ReadLineFromNode(ANode, AData, ADoc);
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'path': Result := ReadPathFromNode(ANode, AData, ADoc);
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'polygon', 'polyline': Result := ReadPolyFromNode(ANode, AData, ADoc);
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@ -1192,7 +1223,7 @@ var
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cx, cy, cr, dtmp: double;
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lCircle: TvCircle;
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i: Integer;
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lNodeName: DOMString;
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lNodeName, lNodeValue: DOMString;
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begin
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cx := 0.0;
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cy := 0.0;
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@ -1210,21 +1241,22 @@ begin
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for i := 0 to ANode.Attributes.Length - 1 do
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begin
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lNodeName := ANode.Attributes.Item[i].NodeName;
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lNodeValue := ANode.Attributes.Item[i].NodeName;
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if lNodeName = 'cx' then
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cx := StringWithUnitToFloat(ANode.Attributes.Item[i].NodeValue)
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cx := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'cy' then
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cy := StringWithUnitToFloat(ANode.Attributes.Item[i].NodeValue)
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cy := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'r' then
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cr := StringWithUnitToFloat(ANode.Attributes.Item[i].NodeValue)
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cr := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'id' then
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lCircle.Name := ANode.Attributes.Item[i].NodeValue
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lCircle.Name := lNodeValue
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else if lNodeName = 'style' then
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ReadSVGStyle(ANode.Attributes.Item[i].NodeValue, lCircle)
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ReadSVGStyle(lNodeValue, lCircle)
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else if IsAttributeFromStyle(lNodeName) then
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begin
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ReadSVGPenStyleWithKeyAndValue(lNodeName, ANode.Attributes.Item[i].NodeValue, lCircle);
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ReadSVGBrushStyleWithKeyAndValue(lNodeName, ANode.Attributes.Item[i].NodeValue, lCircle);
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ReadSVGGeneralStyleWithKeyAndValue(lNodeName, ANode.Attributes.Item[i].NodeValue, lCircle);
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ReadSVGPenStyleWithKeyAndValue(lNodeName, lNodeValue, lCircle);
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ReadSVGBrushStyleWithKeyAndValue(lNodeName, lNodeValue, lCircle);
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ReadSVGGeneralStyleWithKeyAndValue(lNodeName, lNodeValue, lCircle);
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end;
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end;
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@ -1242,7 +1274,7 @@ var
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cx, cy, crx, cry: double;
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lEllipse: TvEllipse;
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i: Integer;
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lNodeName: DOMString;
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lNodeName, lNodeValue: DOMString;
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begin
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cx := 0.0;
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cy := 0.0;
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@ -1261,23 +1293,24 @@ begin
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for i := 0 to ANode.Attributes.Length - 1 do
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begin
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lNodeName := ANode.Attributes.Item[i].NodeName;
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lNodeValue := ANode.Attributes.Item[i].NodeName;
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if lNodeName = 'cx' then
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cx := StringWithUnitToFloat(ANode.Attributes.Item[i].NodeValue)
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cx := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'cy' then
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cy := StringWithUnitToFloat(ANode.Attributes.Item[i].NodeValue)
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cy := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'rx' then
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crx := StringWithUnitToFloat(ANode.Attributes.Item[i].NodeValue)
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crx := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'ry' then
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cry := StringWithUnitToFloat(ANode.Attributes.Item[i].NodeValue)
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cry := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'id' then
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lEllipse.Name := ANode.Attributes.Item[i].NodeValue
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else if lNodeName = 'style' then
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ReadSVGStyle(ANode.Attributes.Item[i].NodeValue, lEllipse)
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ReadSVGStyle(lNodeValue, lEllipse)
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else if IsAttributeFromStyle(lNodeName) then
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begin
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ReadSVGPenStyleWithKeyAndValue(lNodeName, ANode.Attributes.Item[i].NodeValue, lEllipse);
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ReadSVGBrushStyleWithKeyAndValue(lNodeName, ANode.Attributes.Item[i].NodeValue, lEllipse);
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ReadSVGGeneralStyleWithKeyAndValue(lNodeName, ANode.Attributes.Item[i].NodeValue, lEllipse);
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ReadSVGPenStyleWithKeyAndValue(lNodeName, lNodeValue, lEllipse);
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ReadSVGBrushStyleWithKeyAndValue(lNodeName, lNodeValue, lEllipse);
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ReadSVGGeneralStyleWithKeyAndValue(lNodeName, lNodeValue, lEllipse);
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end;
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end;
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@ -1289,6 +1322,95 @@ begin
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Result := lEllipse;
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end;
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// <image width="92.5" x="0" y="0" height="76.0429"
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// xlink:href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKMAAACGCAYAA
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// ACxDToF......" clip-path="url(#Clip0)" transform="matrix(1 0 0 1 0 0)"/>
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function TvSVGVectorialReader.ReadImageFromNode(ANode: TDOMNode;
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AData: TvVectorialPage; ADoc: TvVectorialDocument): TvEntity;
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var
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lImage: TvRasterImage;
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lx, ly, lw, lh: Double;
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i: Integer;
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lNodeName, lNodeValue: DOMString;
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lImageDataParts: TStringList;
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lImageDataBase64: string;
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lImageData: array of Byte;
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lImageDataStream: TMemoryStream;
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lImageReader: TFPCustomImageReader;
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begin
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lImage := TvRasterImage.Create;
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lx := 0;
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ly := 0;
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lw := 0;
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lh := 0;
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// Apply the layer style
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//ApplyLayerStyles(lEllipse);
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// read the attributes
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for i := 0 to ANode.Attributes.Length - 1 do
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begin
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lNodeName := ANode.Attributes.Item[i].NodeName;
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lNodeValue := ANode.Attributes.Item[i].NodeValue;
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if lNodeName = 'x' then
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lx := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'y' then
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ly := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'width' then
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lw := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'height' then
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lh := StringWithUnitToFloat(lNodeValue)
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else if lNodeName = 'xlink:href' then
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begin
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lImageDataParts := ReadSpaceSeparatedStrings(lNodeValue, ':;,');
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try
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if (lImageDataParts.Strings[0] = 'data') and
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(lImageDataParts.Strings[1] = 'image/png') and
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(lImageDataParts.Strings[2] = 'base64') then
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begin
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lImageReader := TFPReaderPNG.Create;
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lImageDataStream := TMemoryStream.Create;
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try
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lImageDataBase64 := lImageDataParts.Strings[3];
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DecodeBase64(lImageDataBase64, lImageDataStream);
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lImageDataStream.Position := 0;
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lImage.CreateRGB888Image(10, 10);
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lImage.RasterImage.LoadFromStream(lImageDataStream, lImageReader);
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finally
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lImageDataStream.Free;
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lImageReader.Free;
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end;
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end
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else
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raise Exception.Create('[TvSVGVectorialReader.ReadImageFromNode] Unimplemented image format');
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finally
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lImageDataParts.Free;
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end;
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end
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else if lNodeName = 'id' then
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lImage.Name := lNodeValue
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{ else if lNodeName = 'style' then
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ReadSVGStyle(lNodeValue, lImage)}
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else if IsAttributeFromStyle(lNodeName) then
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begin
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//ReadSVGPenStyleWithKeyAndValue(lNodeName, lNodeValue, lImage);
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//ReadSVGBrushStyleWithKeyAndValue(lNodeName, lNodeValue, lImage);
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ReadSVGGeneralStyleWithKeyAndValue(lNodeName, lNodeValue, lImage);
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end;
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end;
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// Record translate data
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lx := lx + lImage.X;
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ly := ly + lImage.Y;
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ConvertSVGCoordinatesToFPVCoordinates(
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AData, lx, ly, lImage.X, lImage.Y);
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ConvertSVGDeltaToFPVDelta(
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AData, lw, lh, lImage.Width, lImage.Height);
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Result := lImage;
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end;
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procedure TvSVGVectorialReader.ReadLayerFromNode(ANode: TDOMNode;
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AData: TvVectorialPage; ADoc: TvVectorialDocument);
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var
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@ -2037,7 +2159,7 @@ var
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lXLink: DOMString = '';
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lInsertedEntity: TvEntity;
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i: Integer;
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lNodeName: DOMString;
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lNodeName, lNodeValue: DOMString;
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begin
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Result := nil;
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@ -2061,6 +2183,24 @@ begin
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lInsert := TvInsert.Create;
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lInsert.InsertEntity := lInsertedEntity;
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// Apply the styles
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// read the attributes
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for i := 0 to ANode.Attributes.Length - 1 do
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begin
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lNodeName := ANode.Attributes.Item[i].NodeName;
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lNodeValue := ANode.Attributes.Item[i].NodeValue;
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{if lNodeName = 'style' then
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ReadSVGStyle(lNodeValue, lText)
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else} if IsAttributeFromStyle(lNodeName) then
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begin
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{ReadSVGPenStyleWithKeyAndValue(lNodeName, lNodeValue, lText);
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ReadSVGBrushStyleWithKeyAndValue(lNodeName, lNodeValue, lText);
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ReadSVGFontStyleWithKeyAndValue(lNodeName, lNodeValue, lText);}
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ReadSVGGeneralStyleWithKeyAndValue(lNodeName, lNodeValue, lInsert);
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end;
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end;
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Result := lInsert;
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end;
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@ -2175,7 +2315,7 @@ var
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{$ifdef SVG_MERGE_LAYER_STYLES}
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lLayerStyleKeys, lLayerStyleValues: TStringList;
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{$endif}
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lNodeName: DOMString;
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lNodeName, lNodeValue: DOMString;
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ANode: TDOMElement;
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i: Integer;
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lCurEntity: TvEntity;
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@ -2200,23 +2340,24 @@ begin
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for i := 0 to ANode.Attributes.Length - 1 do
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begin
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lNodeName := ANode.Attributes.Item[i].NodeName;
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lNodeValue := ANode.Attributes.Item[i].NodeValue;
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if lNodeName = 'viewBox' then
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begin
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lViewBox := ReadSpaceSeparatedFloats(ANode.Attributes.Item[i].NodeValue);
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lViewBox := ReadSpaceSeparatedFloats(lNodeValue, '');
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AData.Width := lViewBox[2] - lViewBox[0];
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AData.Height := lViewBox[3] - lViewBox[1];
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end
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else if lNodeName = 'style' then
|
||||
begin
|
||||
{$ifdef SVG_MERGE_LAYER_STYLES}
|
||||
ReadSVGStyleToStyleLists(ANode.Attributes.Item[i].NodeValue, lLayerStyleKeys, lLayerStyleValues);
|
||||
ReadSVGStyleToStyleLists(lNodeValue, lLayerStyleKeys, lLayerStyleValues);
|
||||
{$endif}
|
||||
end
|
||||
else if IsAttributeFromStyle(lNodeName) then
|
||||
begin
|
||||
{$ifdef SVG_MERGE_LAYER_STYLES}
|
||||
lLayerStyleKeys.Add(lNodeName);
|
||||
lLayerStyleValues.Add(ANode.Attributes.Item[i].NodeValue);
|
||||
lLayerStyleValues.Add(lNodeValue);
|
||||
{$endif}
|
||||
end;
|
||||
end;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user