Hi Anshul,
I made a few changes to make this work. First, I used a modified technique
to scale the image to the right dimensions. I also used the PDFBox
JPEGFactory instead of ImageIO to read the image. Lastly, I wrapped
everything in try-with-resources blocks to make sure what you open is
closed even if there is an exception.
public void convertImgToPDF(String imagePath, String fileName, String
destDir)
throws IOException {
try (PDDocument document = new PDDocument();
InputStream in = new FileInputStream(imagePath)) {
PDImageXObject img = JPEGFactory.createFromStream(document, in);
Dimension scaledSize = getScaledDimension(img.getWidth(),
img.getHeight());
PDPage page = new PDPage(new
PDRectangle(scaledSize.width, scaledSize.height));
document.addPage(page);
try (PDPageContentStream contentStream = new
PDPageContentStream(document, page)) {
contentStream.drawImage(img, 0, 0, scaledSize.width,
scaledSize.height);
}
document.save(destDir + "/" + fileName + ".pdf");
}
}
// 8.5" * 72 points per inch, PDF Units
private static final int MIN_BOUNDARY = 612;
/**
* Using this method to scale images to PDF units, maintaining orientation
as
* landscape or portrait.
*
* Inspired by a stack overflow post
* http://stackoverflow.com/questions/23223716/scaled-
image-blurry-in-pdfbox
*/
private Dimension getScaledDimension(final int originalWidth, final
int originalHeight) {
int newWidth;
int newHeight;
if (originalWidth < originalHeight) {
newWidth = MIN_BOUNDARY;
// scale height to maintain aspect ratio
newHeight = (newWidth * originalHeight) / originalWidth;
}
else {
newHeight = MIN_BOUNDARY;
// scale width to maintain aspect ratio
newWidth = (newHeight * originalWidth) / originalHeight;
}
return new Dimension(newWidth, newHeight);
}
I hope that helps,
Doug
--
http://dougsmithdev.com
On Mon, Oct 10, 2016 at 12:49 PM, Anshul Kayastha <
[email protected]>
wrote:
I am using PDFBox v2 to convert jpg images to PDF. JPG image is already
on
the filesystem, so I just pick it up and convert it to PDF. Below is my
code
public void convertImgToPDF(String imagePath, String fileName, String
destDir) throws IOException {
PDDocument document = new PDDocument();
InputStream in = new FileInputStream(imagePath);
BufferedImage bimg = ImageIO.read(in);
float width = bimg.getWidth();
float height = bimg.getHeight();
PDPage page = new PDPage(new PDRectangle(width, height));
document.addPage(page);
PDImageXObject img = PDImageXObject.createFromFile(imagePath,
document);
PDPageContentStream contentStream = new
PDPageContentStream(document, page);
contentStream.drawImage(img, 0, 0);
contentStream.close();
in.close();
document.save(destDir + "/" + fileName + ".pdf");
document.close();
}
This code does the conversion just fine. However, I have observed the
following in converted PDFs
1. When I open a converted PDF, it opens very slowly (in Acrobat
reader). It seems as it PDF is opening pixel by pixel. If I open any
other
PDF, it opens fine.
2. The default size in acrobat reader is shown as a smaller value
(like 15% or 26%, screenshot attached) for converted PDFs. Even
though it
covers 100% of the screen (15% should have implied that I see a much
smaller image, but that is not the case). When I change the size to
100%, I
see a highly blurred image which is much larger than the actual image
and I
have to scroll left/right and top/down to see the complete image.
Both these observations make me feel that for some reason the PDF that is
getting generated is a much higher resolution than it should have been.
Would that be a fair statement? If so, how can I correct this?
Also, attached is a sample image that I am trying to convert.
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