I'm trying to convert the first page of a PHP generated PDF to an image, and have done so with the following code:
exec("convert http://####.com/tcpdf/examples/example_009.php[0] -resize 100 sample.jpeg");
However I don't want to save the image, I'm looking for a way of including the command in a PHP script in place of an image, e.g: <img src="display_image_script.php?pdf=dynamic_pdf.php">
Is there a way to get ImageMagick to return the image within the PHP page using header('Content-Type: image/jpeg')?
Untested, but try:
header('Content-type: image/jpeg');
passthru("convert somePdfFile.pdf jpeg:-");
You need the passthru to stream the binary back to the browser and the jpeg:- in the command string converts pdf to jpeg and returns the jpeg binary on stdout.
Related
Using strictly the gmagick or imagick libraries for PHP I am trying to convert jpeg2000 data to browser-compatible jpeg. The jp2 works fine, but trying to convert to jpeg seems to just return the same data, no conversion being done.
$image = new Gmagick($_img->getImageBlob());
$image->setImageFormat("jpeg");
Header("Content-type: image/jpeg");
echo $image;
$_img contains the input jp2 data. I want to avoid using exec for conversion using the system library to make this platform independent.
I have a script which takes a base64 string and converts it into a png image. I then use Imagick to to convert the png into a pdf which uses a AdobeRGB1998 icc profile. This all works as expected and creates a color pdf.
$data = str_replace("data:image/png;base64,","",$_POST["rsa"]);
$save = $path.$_POST["pdfname"].".png";
$imagick = new Imagick();
$decoded = base64_decode($data);
$imagick->readimageblob($decoded);
$imagick->writeImage($save);
$imagick->clear();
$imagick->destroy();
exec("convert $path.$_POST["pdfname"].".png -profile AdobeRGB1998.icc -density 300 ".$path.".$_POST["pdfname"].".pdf", $array);
However, when I then use Ghostscript to merge a bunch of these PDFs together using the below code it outputs in grayscale and I'm not sure why.
function getPDFs($e)
{
return $path.$e['pdffilename'].".pdf ";
}
$fileArray = array_map("getPDFs(", $_POST['item']);
$outputName = $path."LatestDispatch.pdf";
$cmd = "gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=$outputName ";
foreach($fileArray as $file) {
$cmd .= $file." ";
}
$result = shell_exec($cmd);
I switched to using Ghostscript as opposed to imagick to merge pdfs. Imagick returned a merged color pdf but seemed to hit a limit as to how many PDF's imagick was able to merge at once. Ghostscript doesn't have any problems or limits as to how many PDFs it merges so would like to continue with this method as opposed to Imagick, however I need to resolve this issue of PDF's outputting in grayscale, not color. Can anyone help please?
Thanks!
First; Ghostscript doesn't 'merge' PDF files. When you present it with a list of PDF files as input, and use the pdfwrite device to output a single PDF file, it isn't 'merging' the PDF files.
What happens is that each PDF file is fully interpreted to produce a sequence of marking operations, these operations are then passed to the device. For rendering devices they render a bitmap. For PDF output, they are emitted as PDF equivalent operations.
So the content of the output PDF file bears no relation to the content of the input files. The appearance should be the same, but its not 'merging'.
You haven't said what version of Ghostscript you are using, or where you sourced it from (or even what OS you are using, but I guess some flavour of Linux). There's nothing obviously wrong with the command line, but if I were you I'd start by not using a script. Just use Ghostscript manually from the shell to see what happens. If that works, ans the script doesn't, then there's something wrong with the script, and you aren't mimicking it properly from teh shell. Have the script print out the precise command line and try to see if there's some difference in what you typed at the shell.
If it behaves the same, then its puzzling. But without some example to look at, there's little I can advise.
How can I make a screenshot from every page of PDF file and save result as images in PHP? Is it possible?
Maybe the "make a screenshot" can be replaced for your purpose by "create a raster image" for each PDF page?
In this case you could use ImageMagick and/or one of its PHP-enabled libraries. Here is a command line representation:
convert some.pdf[15-19] some.png
This will convert not all pages, but the page range 16--20 (page counting here is zero-based (not intuitive, I know...). To convert all pages, just skip the [15-19] part.
The output PNG names will be some-0.png, some-1.png, ... some-4.png.
To create JPEG or GIF instead of PNG, simply use one of these:
convert some.pdf[15-19] some.jpg
convert some.pdf[15-19] some.gif
By default ImageMagick will use a resolution of 72 PPI. This will indirectly determine the image dimensions of the PNG/JPEG/GIF output. Should you need other output dimensions than the defaults, you have different options, for example:
either add -density
or add -resize
to the command line:
convert -density 200 some.pdf some.png
convert some.pdf -resize 50% some.png
I am using ImageMagik to try and convert the contents of a PDF to JPG, but keep getting an empty jpg. I have made sure the perms are 777 on everything for testing so I am a little lost how to continue.
Here is the script I am running
<?php
exec('convert testfile.pdf output.jpg', $output, $return_var);
?>
Try this.
<?php
$pdf = 'testfile.pdf';
$save = 'output.jpg';
exec('convert "'.$pdf.'" -colorspace RGB -resize 800 "'.$save.'"', $output, $return_var);
?>
Use the absolute path to the binary, like this:
exec('/usr/bin/convert testfile.pdf output.jpg', $output, $return_var);
But make sure your convert binary is actually on /usr/bin you can check that out with the following command:
which convert
convert -normalize yourfile.pdf[0] yourdestination.jpg
ImageMagick internally use GhostScript and Generally the conversion of ImageMagick is slow Comparing to Ghoastscript, so If you are only interested on getting convert pdf to images then Ghostscript gs command is faster.
below is an sample wrapper around Ghostscript which I wrote few days back.
PDFLib-Php
$pdflib = new ImalH\PDFLib\PDFLib();
$pdflib->setPdfPath($pdf_file_path);
$pdflib->setOutputPath($folder_path_for_images);
$pdflib->setImageQuality(95);
$pdflib->setDPI(300);
$pdflib->setPageRange(1,$pdflib->getNumberOfPages());
$pdflib->convert();
Here you have my solution. Use Imagick directly in your php code.
Convert all PDF pages to JPG
// create Imagick object
$imagick = new Imagick();
// Reads image from PDF
$imagick->readImage('file.pdf');
// Writes an image
$imagick->writeImages('converted.jpg', false);
Convert specific PDF page to JPG
// create Imagick object
$imagick = new Imagick();
// Read image from PDF
$imagick->readImage('test.pdf[0]');
// Writes an image
$imagick->writeImages('converted_page_one.jpg');
Another way to deal with this problem is to use spatie/pdf-to-image library.
Cheers!
I am using imagemagick on a pdf file on my server, the conversion works correctly however when I look at the jpb that was converted only shows some of the items in the first page of the pdf. However it is missing the complete image in the back.
/usr/local/bin/convert -size 250x350 testimage.pdf[0] testimage.jpg
this is my php code I am using to convert the pdf to jpg.
This is what it should look like
However it looks like this
It looks like a layer try:
/usr/local/bin/convert testimage.pdf[0] -flatten testimage.jpg
Why did you have the -size 250x350 in the code?