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<?php
# $Id: starter_layer.php,v 1.1.2.2 2008/02/11 20:10:28 rjs Exp $
# 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 7
# Required data: grayscale and RGB images
#
# This is where the data files are. Adjust as necessary.
$searchpath = "../data";
$title = "Starter Layer";
# create a new PDFlib object
$p = PDF_new();
$rgb = "nesrin.jpg";
$gray = "nesrin_gray.jpg";
PDF_set_parameter($p, "SearchPath", $searchpath);
# This means we must check return values of load_font() etc.
PDF_set_parameter($p, "errorpolicy", "return");
# Open the document with the "Layers" navigation tab visible
if (PDF_begin_document($p, "", "openmode=layers") == 0) {
die("Error: " . PDF_get_errmsg($p));
}
PDF_set_info($p, "Creator", "PDFlib Cookbook");
$buf = $title . ' $Revision: 1.1.2.2 $';
PDF_set_info($p, "Title", $buf);
# Load the font
$font = PDF_load_font($p, "Helvetica", "winansi", "");
if ($font == 0) {
die("Error: " . PDF_get_errmsg($p));
}
# Load the Grayscale image
$imageGray = PDF_load_image($p, "auto", $gray, "");
if ($imageGray == 0) {
die("Error: " . PDF_get_errmsg($p));
}
# Load the RGB image
$imageRGB = PDF_load_image($p, "auto", $rgb, "");
if ($imageRGB == 0) {
die("Error: " . PDF_get_errmsg($p));
}
# 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"
$layerRGB = PDF_define_layer($p, "RGB", "");
# Define the layer "Grayscale" which is hidden when opening the
# document or printing it.
$layerGray = PDF_define_layer($p, "Grayscale",
"initialviewstate=false initialprintstate=false");
# At most one of the "Grayscale" and "RGB" layers should be visible
$buf = "group={" . $layerGray . " " . $layerRGB . "}";
PDF_set_layer_dependency($p, "Radiobtn", $buf);
# Define the layer "English"
$layerEN = PDF_define_layer($p, "English", "");
# Define the layer "German" which is hidden when opening the document
# or printing it.
$layerDE = PDF_define_layer($p, "German",
"initialviewstate=false initialprintstate=false");
# At most one of the "English" and "German" layers should be visible
$buf = "group={" . $layerEN . " " . $layerDE . "}";
PDF_set_layer_dependency($p, "Radiobtn", $buf);
# Start page
PDF_begin_page_ext($p, 0, 0, "width=a4.width height=a4.height");
# Place the RGB image on the layer "RGB"
PDF_begin_layer($p, $layerRGB);
PDF_fit_image($p, $imageRGB, 100, 400,
"boxsize={400 300} fitmethod=meet");
# Place the Grayscale image on the layer "Grayscale"
PDF_begin_layer($p, $layerGray);
PDF_fit_image($p, $imageGray, 100, 400,
"boxsize={400 300} fitmethod=meet");
# Place an English image caption on the layer "English"
PDF_begin_layer($p, $layerEN);
$buf = "font=" . $font . " fontsize=20";
PDF_fit_textline($p, "This is the Nesrin image.", 100, 370, $buf);
# Place a German image caption on the layer "German".
PDF_begin_layer($p, $layerDE);
$buf = "font=" . $font . " fontsize=20";
PDF_fit_textline($p, "Das ist das Nesrin-Bild.", 100, 370, $buf);
PDF_end_layer($p);
PDF_end_page_ext($p, "");
PDF_end_document($p, "");
$buf = PDF_get_buffer($p);
$len = strlen($buf);
header("Content-type: application/pdf");
header("Content-Length: $len");
header("Content-Disposition: inline; filename=hello.pdf");
print $buf;
?>
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