I am upgrading batik-1.7 to 1.11 and fop-0.94 to 2.2. I am using PDFTranscoder of fop to convert SVG to PDF in my application. stroke-opacity is applied to text in svg. Before upgrading pdf looks good and result is as expected with opacity. But after upgrading stroke-opacity is not being applied to text.
Below is the code used to convert svg to pdf:
Transcoder transcoder = new PDFTranscoder();
TranscoderInput input = new TranscoderInput(svgFile.toURI().toString());
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
TranscoderOutput output = new TranscoderOutput(outStream);
transcoder.transcode(input, output);
svg file used:
<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" height="418" viewBox="0,0 65416,45424" width="816" xml:space="preserve">
<defs>
<style type="text/css"><![CDATA[
.P{
font-family:"Arial";
font-weight:normal;
font-size:247px;
font-family:"Lucida Sans";
font-style:normal;
stroke:#000;
stroke-width:16px;
stroke-dasharray:none;
stroke-linejoin:miter;
stroke-miterlimit:10;
stroke-width:0.5px;
stroke-linecap:square;
stroke-opacity:1.0;
fill:none;
fill-opacity:0.0;
fill-rule:evenodd;
}
.M{
font-family:"Arial";
font-weight:normal;
font-size:282px;
font-style:normal;
stroke:#00F;
stroke-dasharray:none;
stroke-linejoin:miter;
stroke-miterlimit:10;
stroke-width:2px;
stroke-linecap:square;
stroke-opacity:1.0;
fill:#00F;
fill-rule:evenodd;
fill-opacity:1.0;
}
.dimmed{
stroke-opacity:0.5;
fill-opacity:0.0;
}
]]></style>
</defs>
<g>
<g>
<path class="dimmed P" d="M7964,25320h5669m-5669,0v1905m0,-1401h5669m-5669,467h5669m-5669,467h5669m-5669,467h5669m-4968,-1401v1401m934,-1401v1401m785,-1401v1401m743,-1401v1401m1295,-1401v1401m1210,-1905v1905"/>
<text class="dimmed M" x="10258" y="25695">CONN3</text>
<text class="M" x="8054" y="26172">Cav</text>
</g>
</g>
</svg>
Stroke-opacity in "dimmed" class is not showing any effect on the text "CONN3" after upgrading batik and fop.
The above error occured because stroke -opacity of text is assigned as "1" by default. So whatever the value we pass to stroke-oppacity attribute it does not have any effect.
I have solved the issue by modifying the "applyColorAndPaint" of PDFTextPainter.java in fop source code and rebuilt the jar.
private void applyColorAndPaint(TextPaintInfo tpi) {
Paint fillPaint = tpi.fillPaint;
Paint strokePaint = tpi.strokePaint;
Stroke stroke = tpi.strokeStroke;
int fillAlpha = PDFGraphics2D.OPAQUE;
int strokeAlpha = PDFGraphics2D.OPAQUE;
if (fillPaint instanceof Color) {
Color col = (Color) fillPaint;
pdf.applyColor(col, true);
fillAlpha = col.getAlpha();
}
if (strokePaint instanceof Color) {
Color col = (Color) strokePaint;
pdf.applyColor(col, false);
strokeAlpha = col.getAlpha();
}
pdf.applyPaint(fillPaint, true);
pdf.applyStroke(stroke);
if (strokePaint != null){
pdf.applyPaint(strokePaint, false);
}
pdf.applyAlpha(fillAlpha, strokeAlpha);
}