protected void transcode(Document document, String uri,
TranscoderOutput output)
throws TranscoderException {
if (!(document instanceof SVGOMDocument)) {
throw new TranscoderException(Messages.formatMessage("notsvg",
null));
}
SVGDocument svgDoc = (SVGDocument)document;
SVGSVGElement root = svgDoc.getRootElement();
// initialize the SVG document with the appropriate context
String parserClassname = (String)hints.get(KEY_XML_PARSER_CLASSNAME);
boolean stroke = true;
if (hints.containsKey(KEY_STROKE_TEXT)) {
stroke = ((Boolean)hints.get(KEY_STROKE_TEXT)).booleanValue();
}
// build the GVT tree
GVTBuilder builder = new GVTBuilder();
BridgeContext ctx = new BridgeContext(userAgent);
TextPainter textPainter = null;
textPainter = new StrokingTextPainter();
ctx.setTextPainter(textPainter);
PDFAElementBridge pdfAElementBridge = new PDFAElementBridge();
AffineTransform currentTransform = new AffineTransform(1, 0, 0, 1, 0, 0);
pdfAElementBridge.setCurrentTransform(currentTransform);
ctx.putBridge(pdfAElementBridge);
ctx.putBridge(new PDFImageElementBridge());
GraphicsNode gvtRoot;
try {
gvtRoot = builder.build(ctx, svgDoc);
} catch (BridgeException ex) {
throw new TranscoderException(ex);
}
// get the 'width' and 'height' attributes of the SVG document
float docWidth = (float)ctx.getDocumentSize().getWidth();
float docHeight = (float)ctx.getDocumentSize().getHeight();
ctx = null;
builder = null;
// compute the image's width and height according the hints
float imgWidth = -1;
if (hints.containsKey(ImageTranscoder.KEY_WIDTH)) {
imgWidth =
((Float)hints.get(ImageTranscoder.KEY_WIDTH)).floatValue();
}
float imgHeight = -1;
if (hints.containsKey(ImageTranscoder.KEY_HEIGHT)) {
imgHeight =
((Float)hints.get(ImageTranscoder.KEY_HEIGHT)).floatValue();
}
float width, height;
if (imgWidth > 0 && imgHeight > 0) {
width = imgWidth;
height = imgHeight;
} else if (imgHeight > 0) {
width = (docWidth * imgHeight) / docHeight;
height = imgHeight;
} else if (imgWidth > 0) {
width = imgWidth;
height = (docHeight * imgWidth) / docWidth;
} else {
width = docWidth;
height = docHeight;
}
// compute the preserveAspectRatio matrix
AffineTransform Px;
String ref = null;
try {
ref = new URL(uri).getRef();
} catch (MalformedURLException ex) {
// nothing to do, catched previously
}
try {
Px = ViewBox.getViewTransform(ref, root, width, height);
} catch (BridgeException ex) {
throw new TranscoderException(ex);
}
if (Px.isIdentity() && (width != docWidth || height != docHeight)) {
// The document has no viewBox, we need to resize it by hand.
// we want to keep the document size ratio
float d = Math.max(docWidth, docHeight);
float dd = Math.max(width, height);
float scale = dd / d;
Px = AffineTransform.getScaleInstance(scale, scale);
}
// take the AOI into account if any
if (hints.containsKey(ImageTranscoder.KEY_AOI)) {
Rectangle2D aoi = (Rectangle2D)hints.get(ImageTranscoder.KEY_AOI);
// transform the AOI into the image's coordinate system
aoi = Px.createTransformedShape(aoi).getBounds2D();
AffineTransform Mx = new AffineTransform();
double sx = width / aoi.getWidth();
double sy = height / aoi.getHeight();
Mx.scale(sx, sy);
double tx = -aoi.getX();
double ty = -aoi.getY();
Mx.translate(tx, ty);
// take the AOI transformation matrix into account
// we apply first the preserveAspectRatio matrix
Px.preConcatenate(Mx);
}
// prepare the image to be painted
int w = (int)width;
int h = (int)height;
PDFDocumentGraphics2D graphics;
try {
graphics = new PDFDocumentGraphics2D(stroke,
output.getOutputStream(), w, h);
} catch (FOPException ex) {
throw new TranscoderException(ex);
}
graphics.setSVGDimension(docWidth, docHeight);
currentTransform.setTransform(1, 0, 0, -1, 0, height);
if (!stroke) {
textPainter = new PDFTextPainter(graphics.getFontState());
ctx.setTextPainter(textPainter);
}
if (hints.containsKey(ImageTranscoder.KEY_BACKGROUND_COLOR)) {
graphics.setBackgroundColor((Color)hints.get(ImageTranscoder.KEY_BACKGROUND_COLOR));
}
graphics.setGraphicContext(new org.apache.batik.ext.awt.g2d.GraphicContext());
gvtRoot.paint(graphics);
try {
graphics.finish();
} catch (Exception ex) {
ex.printStackTrace();
throw new TranscoderException(ex);
}
}