/**
* Helperfunction to extract an image from an imagereference. If the image is contained as
* java.awt.Image object only, the image is recoded into an PNG-Image.
*
* @param reference the image reference.
* @return an image.
* @throws com.lowagie.text.DocumentException if no PDFImageElement could be created using the
* given ImageReference.
* @throws java.io.IOException if the image could not be read.
*/
public Image getImage(final ImageContainer reference) throws DocumentException, IOException {
if (reference == null) {
throw new NullPointerException();
}
Object identity = null;
java.awt.Image image = null;
if (reference instanceof URLImageContainer) {
final URLImageContainer urlImageContainer = (URLImageContainer) reference;
final ResourceKey url = urlImageContainer.getResourceKey();
if (url != null && urlImageContainer.isLoadable()) {
identity = url;
final Image cached = (Image) cachedImages.get(identity);
if (cached != null) {
return cached;
}
try {
final ResourceData resourceData = resourceManager.load(url);
final byte[] data = resourceData.getResource(resourceManager);
final Image itextimage = Image.getInstance(data);
cachedImages.put(identity, itextimage);
return itextimage;
} catch (ResourceException re) {
RTFImageCache.logger.info("Caught illegal Image, will recode to PNG instead", re);
} catch (BadElementException be) {
RTFImageCache.logger.info("Caught illegal Image, will recode to PNG instead", be);
} catch (IOException ioe) {
RTFImageCache.logger.info(
"Unable to read the raw-data, will try to recode image-data.", ioe);
}
try {
final Resource resource = resourceManager.create(url, null, Image.class);
image = (java.awt.Image) resource.getResource();
} catch (ResourceException re) {
RTFImageCache.logger.info("Caught illegal Image, will try to find local instance", re);
}
}
}
if (reference instanceof LocalImageContainer && image == null) {
final LocalImageContainer localImageContainer = (LocalImageContainer) reference;
image = localImageContainer.getImage();
if (image != null) {
// check, if the content was cached ...
identity = localImageContainer.getIdentity();
if (identity != null) {
final Image cachedImage = (Image) cachedImages.get(identity);
if (cachedImage != null) {
return cachedImage;
}
}
}
}
if (image == null) {
return null;
}
final WaitingImageObserver obs = new WaitingImageObserver(image);
obs.waitImageLoaded();
try {
final byte[] data = RenderUtility.encodeImage(image);
final Image itextimage = Image.getInstance(data);
if (identity != null) {
cachedImages.put(identity, itextimage);
}
return itextimage;
} catch (UnsupportedEncoderException uee) {
logger.warn("Assertation-Failure: PNG encoding failed.", uee);
return null;
}
}
protected void drawReplacedContent(final RenderableReplacedContentBox content) {
final Graphics2D g2 = getGraphics();
final Object o = content.getContent().getRawObject();
if (o instanceof DrawableWrapper) {
final DrawableWrapper drawableWrapper = (DrawableWrapper) o;
if (drawDrawable(content, g2, drawableWrapper)) {
drawImageMap(content);
}
return;
}
if (o instanceof Image) {
if (drawImage(content, (Image) o)) {
drawImageMap(content);
}
return;
}
if (o instanceof URLImageContainer) {
final URLImageContainer imageContainer = (URLImageContainer) o;
if (imageContainer.isLoadable() == false) {
PdfLogicalPageDrawable.logger.info(
"URL-image cannot be rendered, as it was declared to be not loadable: "
+ imageContainer.getSourceURLString());
} else {
final ResourceKey resource = imageContainer.getResourceKey();
if (resource == null) {
PdfLogicalPageDrawable.logger.info(
"URL-image cannot be rendered, as it did not return a valid URL.");
} else {
try {
final ResourceManager resourceManager = getResourceManager();
final com.lowagie.text.Image instance;
final com.lowagie.text.Image maybeImage = imageCache.get(resource);
if (maybeImage != null) {
instance = maybeImage;
} else {
final ResourceData data = resourceManager.load(resource);
instance = com.lowagie.text.Image.getInstance(data.getResource(resourceManager));
imageCache.put(resource, instance);
}
final Resource imageWrapped = resourceManager.create(resource, null, Image.class);
final Image image = (Image) imageWrapped.getResource();
if (drawImage(content, image, instance)) {
drawImageMap(content);
}
return;
} catch (InvalidReportStateException re) {
throw re;
} catch (Exception e) {
PdfLogicalPageDrawable.logger.info(
"URL-image cannot be rendered, as the image was not loadable.", e);
}
}
}
}
if (o instanceof LocalImageContainer) {
final LocalImageContainer imageContainer = (LocalImageContainer) o;
final Image image = imageContainer.getImage();
if (drawImage(content, image)) {
drawImageMap(content);
}
} else {
PdfLogicalPageDrawable.logger.debug("Unable to handle " + o);
}
}