graphics/starter_layer
Define several layers, output images and text into them and define particular layers to be visible when opening the document.
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<?php
/*
* Starter layer:
* Define several layers, output images and text to them and define
* particular layers to be visible when opening the document
*
* Define two layers for RGB or Grayscale images and two layers for English or
* German image captions. Output images and text on the various layers and
* open the document with the RGB images and English captions visible.
*
* Required software: PDFlib/PDFlib+PDI/PPS 10
* Required data: grayscale and RGB images
*/
/* This is where the data files are. Adjust as necessary. */
$searchpath = dirname(__FILE__,3)."/input";
$outfile = "";
$title = "Starter Layer";
$rgb = "nesrin.jpg";
$gray = "nesrin_gray.jpg";
try {
$p = new pdflib();
$p->set_option("searchpath={" . $searchpath . "}");
/* This means we must check return values of load_font() etc. */
$p->set_option("errorpolicy=return");
/* Open the document with the "Layers" navigation tab visible */
if ($p->begin_document($outfile, "openmode=layers") == 0)
throw new Exception("Error: " . $p->get_errmsg());
$p->set_info("Creator", "PDFlib Cookbook");
$p->set_info("Title", $title );
/* Load the Grayscale image */
$imageGray = $p->load_image("auto", $gray, "");
if ($imageGray == 0)
throw new Exception("Error: " . $p->get_errmsg());
/* Load the RGB image */
$imageRGB = $p->load_image("auto", $rgb, "");
if ($imageRGB == 0)
throw new Exception("Error: " . $p->get_errmsg());
/* Define all layers which will be used, and their relationships. This
* should be done before the first page if the layers are used on more
* than one page.
*/
/* Define the layer "RGB" */
$layerRGB = $p->define_layer("RGB", "");
/* Define the layer "Grayscale" which is hidden when opening the
* document or printing it.
*/
$layerGray = $p->define_layer("Grayscale", "initialviewstate=false " .
"initialprintstate=false");
/* At most one of the "Grayscale" and "RGB" layers should be visible */
$p->set_layer_dependency("Radiobtn", "group={" . $layerGray . " " .
$layerRGB . "}");
/* Define the layer "English" */
$layerEN = $p->define_layer("English", "");
/* Define the layer "German" which is hidden when opening the document
* or printing it.
*/
$layerDE = $p->define_layer("German", "initialviewstate=false " .
"initialprintstate=false");
/* At most one of the "English" and "German" layers should be visible */
$p->set_layer_dependency("Radiobtn", "group={" . $layerEN . " " .
$layerDE . "}");
/* Start the page */
$p->begin_page_ext(0, 0, "width=a4.width height=a4.height");
/* Place the RGB image on the "RGB" layer */
$p->begin_layer($layerRGB);
$p->fit_image($imageRGB, 100, 400, "boxsize={400 300} fitmethod=meet");
/* Place the Grayscale image on the "Grayscale" layer */
$p->begin_layer($layerGray);
$p->fit_image($imageGray, 100, 400, "boxsize={400 300} fitmethod=meet");
/* Place an English image caption on the "English" layer */
$p->begin_layer($layerEN);
$p->fit_textline("This is the Nesrin image.", 100, 370,
"fontname=NotoSerif-Regular fontsize=20");
/* Place a German image caption on the "German" layer */
$p->begin_layer($layerDE);
$p->fit_textline("Das ist das Nesrin-Bild.", 100, 370,
"fontname=NotoSerif-Regular fontsize=20");
$p->end_layer();
$p->end_page_ext("");
$p->end_document("");
$buf = $p->get_buffer();
$len = strlen($buf);
header("Content-type: application/pdf");
header("Content-Length: $len");
header("Content-Disposition: inline; filename=starter_layer.pdf");
print $buf;
} catch (PDFlibException $e){
echo("PDFlib exception occurred:\n" .
"[" . $e->get_errnum() . "] " . $e->get_apiname() .
": " . $e->get_errmsg() . "\n");
exit(1);
} catch (Throwable $e) {
echo("PHP exception occurred: " . $e->getMessage() . "\n");
exit(1);
}
$p = 0;
?>