PDFlib & PHP - (4) fit_image from XML/URL

Here I'm going to add to the previous blog-post-code by adding an image tag on the same level as the: name, genre, and favoriteSong (+ image, now). While I'm having difficulty sharing the XML, I think nesting bulleted lists may be a good visual representation.

• bands [singular parent]
  • band [multiple children]
    • name
    • genre
    • favoriteSong
    • image

There is the best I can do to share the XML. The point of this post is the journey to loading and placing an image in a somewhat templated manner, i.e. I'm going to grab a pic of each of the three bands in my own XML, add the web-location of this picture, and I'm guessing they won't be the same size, but then I'll place them on the page(s) respectively.

NOTE: The crux of the code will be the few lines added to the (3) XML it! post to add the image. This is noted in comments.

try{

	# image tag of xml has url to image like so:

	#   http://img.karaoke-lyrics.net/img/artists/32670/the-pogues-164114.jpg

	$xml = new SimpleXMLElement($xmlstr);

	# number reflect an A4 sized document.

	$doc_width = 595;

	$doc_height = 842;

	# create a new instance of PDFlib.

	$p = new PDFlib();

	$p->set_parameter("logging", "filename {PDFlib.log}");

	$p->set_parameter("errorpolicy", "exception");

	# set textformat

	$p->set_parameter("textformat", "utf8");

	# SPACES are important here, at end of concatenated lines.

	# all we really need for example to work are the groups and labels chunk.

	$optlist = "groups={title toc content index} ".

			"labels={{group=title prefix=title} ".

			"{group=toc prefix={toc } start=1 style=r} ".

			"{group=content start=1 style=D} ".

			"{group=index prefix={index } start=1 style=r} } ".

			"destination={ type=fixed zoom=.5 } " .

            "viewerpreferences={displaydoctitle=true direction=l2r} ".

			"openmode=thumbnails ".

			"pagelayout=twocolumnleft ";

	if ($p->begin_document("", $optlist) == 0) 

	   throw new Exception("Error@begin_document: " . $p->get_errmsg());

	# add some meta data on file

	$p->set_info("Creator", "Neil Lindberg");

    $p->set_info("Title", "SVM User Guide (2.1)");

	# loading font (that most will have)

	$font = $p->load_font("Helvetica", "unicode", "");

	$p->begin_page_ext($doc_width, $doc_height, "group=title");

	if ($p->setfont($font, 24) == 0) 

	   throw new Exception("Error@setfont: " . $p->get_errmsg());

	# add line of text, to center of page, approximately :)

	$message = "Bands XML Breakdown";

	$message_width = $p->stringwidth($message, $font, 24);

	$p->show_xy($message, ($doc_width*.5)-($message_width*.5), $doc_height*.5);

	#

	$p->end_page_ext("");

	# make page per band... suspend to later add page footer/num.

	$num_bands = count($xml->band);

	$count = 0;

	foreach($xml->band as $x){

		$count++;

		$p->begin_page_ext($doc_width, $doc_height, "group=content");

		if ($p->setfont($font, 24) == 0) 

	   		throw new Exception("Error@setfont: " . $p->get_errmsg());

	   	# put name of band in upper left-aligned corner.

		$message = $x->name;

		$p->show_xy($message, 24, $doc_height-48);

		if ($p->setfont($font, 12) == 0) 

	   		throw new Exception("Error@setfont: " . $p->get_errmsg());

	   	# add band info in a rectangular container, align center.

	   	$band_info = "Genre: $x->genre\nFavorite song: $x->favoriteSong";

	   	# NOTE: using fillcolor rather than ->setcolor does

	   	#   not require setting back to black.

	   	$band_info_font = "font=$font fontsize=12 alignment=center ".

	   	"fillcolor={spotname {PANTONE 222 U} 1}";

	   	$textflow = $p->create_textflow($band_info, $band_info_font);

	   	$p->fit_textflow($textflow, 50, 120, 550, 720, "");

	   	############### new image stuff ###########

	   	# loading image from url is a bit more work. this section is that...

	   	# we will load it and then put it in a temp pvf file

	   	$image_data = file_get_contents($x->image);

	   	$p->create_pvf("/pvf/image", $image_data, "");

	   	# load image. auto == automatically detect type. could be jpeg, etc.

	   	# NOTE: if image were local none of the pvf would be needed.

	   	#  instead the "/pvf/image" would be the image local name...

	   	$image = $p->load_image("auto", "/pvf/image", "");

	   	# temp pvf used, clear it for next run.

	   	$p->delete_pvf("/pvf/image");

	   	# finally place image.

	   	$matchbox_name = $count."_image";

	   	# options say: matchbox (for future access), boxsize for w/h, and finally,

	   	#  boxsize wouldn't work w/o some fitmethod. meet == scale to boxsize.

	   	$fit_image_opts = "matchbox={name=$matchbox_name} ".

	   	"boxsize={200 200} fitmethod=meet";

	   	$p->fit_image($image, 200, 400, $fit_image_opts);

	   	$p->close_image($image);

	   	# add the url to the bottom of image using matchbox

	   	if($p->info_matchbox($matchbox_name, 1, "exists")){

	   		# x1, y1 = lower left. x2, y2 = lower right, etc.

	   		$lower_left_x = $p->info_matchbox($matchbox_name, 1, "x1");

	   		$lower_left_y = $p->info_matchbox($matchbox_name, 1, "y1");

	   		$image_nm = explode("/", $x->image);

	   		$p->show_xy($image_nm[count($image_nm)-1], 

		   		$lower_left_x, 

		   		$lower_left_y-12);

	   	}

	   	############### end new image stuff #######

	   	# add page n of E.

	   	$message = "Page $count of $num_bands";

		$message_width = $p->stringwidth($message, $font, 12);

		# cause to right-align in bottom corner.

		$page_num_x = ($doc_width-$message_width)-24;

		$page_num_y = $doc_height-($doc_height-24);

	   	$p->show_xy($message, 

		   	$page_num_x, 

		   	$page_num_y);

		$p->end_page_ext("");

	}

	#

	$p->end_document("");

	# get and send buffer

	$buf = $p->get_buffer();

	$len = strlen($buf);

	header("Content-type: application/pdf");

	header("Content-Length: $len");

	header("Content-Disposition: inline; filename=blog_4.pdf");

	print $buf;

} catch (PDFlibException $e) {

	die("PDFlib exception occurred:\n".

	"[" . $e->get_errnum() . "] " . $e->get_apiname() .

	": " . $e->get_errmsg() . "\n");

} catch (Exception $e) {

	die($e->getMessage());

}