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http://issues.apache.org/bugzilla/show_bug.cgi?id=27971 Bugs on the transformation of the linearGradient element for SVG to PDF Summary: Bugs on the transformation of the linearGradient element for SVG to PDF Product: Fop Version: 1.0dev Platform: PC OS/Version: Windows XP Status: NEW Severity: Major Priority: Other Component: svg AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] CC: [EMAIL PROTECTED] There's a bug found while converting an SVG file to PDF file with some functionalities of linearGradient and object translation, using the FOP version xml-fop_20040318232912.tar.gz The source SVG file contains two rect shapes, one is located from the origin, another is translated for some distance. Both of them are employed with a same linearGradient, names "linearGradient1", which is defined based on the origin of the SVG coordinate. However, in the converted PDF file, the translated rect object just displays a single color (the second stop color of the linearGradient), while the un-translated rect object displays normally. We found the root cause of this issue maybe the improper concatinating transformations implemented in the ApplyPaint() function of the class org.apache.fop.svg.PDFGraphics2D, omitting a necessary concatinating transform: ============================= //MultipleGradientPaint.CycleMethodEnum cycenum = gp.getCycleMethod(); //boolean cyclic = (cycenum == MultipleGradientPaint.REPEAT); AffineTransform transform = graphicsState.getTransform(); transform.concatenate(gp.getTransform()); transform.concatenate(getTransform()); ///Here the fixing ============================= The sample of SVG file is attached as below: =================================================================== <?xml version="1.0" standalone="no"?> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";> <svg width="800" height="600" viewBox="0 0 800 600" xmlns="http://www.w3.org/2000/svg"; version="1.1"> <desc>Example lingrad01 - fill a rectangle using a linear gradient paint server</desc> <g> <defs> <linearGradient x1="10" gradientUnits="userSpaceOnUse" x2="300" y1="10" y2="300" id="linearGradient1" spreadMethod="pad"> <stop style="stop-opacity:1; stop-color:blue;" offset="0%" /> <stop style="stop-opacity:1; stop-color:green;" offset="100%" /> </linearGradient> </defs> <!-- The rectangle is filled using a linear gradient paint server --> <rect x="10" y="10" width="290" style="fill:url(#linearGradient1); stroke:none;" height="290" /> <rect transform="translate(300,300)" x="10" y="10" width="290" style="fill:url (#linearGradient1); stroke:none;" height="290" /> <rect x="0" y="0" height="600" width="800" style="stroke:red; fill:none"/> </g> </svg> ============================================================================
