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<?php
/**
* E037_image_methods.php
*
* @since 2017-05-08
* @category Library
* @package Pdf
* @author Nicola Asuni <info@tecnick.com>
* @copyright 2002-2026 Nicola Asuni - Tecnick.com LTD
* @license https://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE.TXT)
* @link https://github.com/tecnickcom/tc-lib-pdf
*
* This file is part of tc-lib-pdf software library.
*/
// NOTE: run make deps fonts in the project root to generate the dependencies and example fonts.
// autoloader when using Composer
require __DIR__ . '/../vendor/autoload.php';
\define('OUTPUT_FILE', \realpath(__DIR__ . '/../target') . '/example.pdf');
// define fonts directory
\define('K_PATH_FONTS', \realpath(__DIR__ . '/../vendor/tecnickcom/tc-lib-pdf-font/target/fonts'));
// autoloader when using RPM or DEB package installation
//require ('/usr/share/php/Com/Tecnick/Pdf/autoload.php');
// main TCPDF object
$pdf = new \Com\Tecnick\Pdf\Tcpdf(
unit: 'mm',
isunicode: true,
subsetfont: false,
compress: true,
mode: '',
objEncrypt: null,
);
// ----------
$pdf->setCreator('tc-lib-pdf');
$pdf->setAuthor('Nicola Asuni');
$pdf->setSubject('tc-lib-pdf example: 037');
$pdf->setTitle('Image Methods');
$pdf->setKeywords('TCPDF tc-lib-pdf image methods jpeg png svg placement scaling');
$pdf->setPDFFilename('037_image_methods.pdf');
$pdf->setViewerPreferences(['DisplayDocTitle' => true]);
$pdf->enableDefaultPageContent();
// ----------
// Insert fonts
$bfont1 = $pdf->font->insert($pdf->pon, 'helvetica', '', 12);
// test images directory
$imgdir = \realpath(__DIR__ . '/../vendor/tecnickcom/tc-lib-pdf-image/test/images/');
// ----------
// Add first page
$page01 = $pdf->addPage();
$html = <<<HTML
<h1 style="font-size:16pt; color:#003366;">Image Methods</h1>
<p style="font-size:9pt; color:#333333;">
This example shows how to place JPEG and PNG images with different color models and transparency.
</p>
HTML;
$pdf->addHTMLCell(html: $html, posx: 15, posy: 15, width: 180);
$posx = 5;
$posy = 40;
// Cell grid geometry: 5 columns, each sample rendered $cellw units wide.
$cellw = 40;
$rowh = 20;
$cols = 5;
// Sample images exercising different color models and transparency.
$samples = [
'200x100_CMYK.jpg', // CMYK JPEG sample.
'200x100_GRAY.jpg', // Grayscale JPEG sample.
'200x100_GRAY.png', // Grayscale PNG sample.
'200x100_INDEX16.png', // Indexed-color PNG with a 16-color palette.
'200x100_INDEX256.png', // Indexed-color PNG with a 256-color palette.
'200x100_INDEXALPHA.png', // Indexed-color PNG with alpha transparency.
'200x100_RGB.jpg', // RGB JPEG sample.
'200x100_RGB.png', // RGB PNG sample.
'200x100_RGBALPHA.png', // RGB PNG with alpha transparency.
'200x100_RGBICC.jpg', // RGB JPEG carrying an ICC color profile.
'200x100_RGBICC.png', // RGB PNG carrying an ICC color profile.
'200x100_RGBINT.png', // RGB PNG variant (alternate RGB image path).
];
// Add Images
//
// Each sample is rendered preserving its original aspect ratio: only the target
// width is provided and the matching height is computed directly from the
// intrinsic image size by image->getImageDimensionsByKey().
foreach ($samples as $index => $name) {
$file = $imgdir . '/' . $name;
// Import the image; add() returns the image instance ID used for placement.
$iid = $pdf->image->add($file);
// Resolve the cache key for the imported image.
$key = $pdf->image->getKey($file);
// Derive the rendered dimensions from the intrinsic image size: a single
// target side (width) is given and the other (height) is computed to
// preserve the original aspect ratio.
$dim = $pdf->image->getImageDimensionsByKey($key, $cellw);
$col = $index % $cols;
$row = \intdiv($index, $cols);
$imgx = $posx + ($col * $cellw);
$imgy = $posy + ($row * $rowh);
$out = $pdf->image->getSetImage($iid, $imgx, $imgy, $dim['width'], $dim['height'], $page01['height']);
$pdf->page->addContent($out);
}
// getImageDimensionsByKey() supports additional resolution modes, for example:
// $pdf->image->getImageDimensionsByKey($key); // original pixel size
// $pdf->image->getImageDimensionsByKey($key, 0, 30); // derive width from height
// $pdf->image->getImageDimensionsByKey($key, 40, 40, true); // scale to fit a 40x40 box
// =============================================================
// ----------
// get PDF document as raw string
$rawpdf = $pdf->getOutPDFString();
// ----------
// Various output modes:
//$pdf->savePDF(\dirname(__DIR__).'/target', $rawpdf);
$pdf->renderPDF(rawpdf: $rawpdf);
//$pdf->downloadPDF($rawpdf);
//echo $pdf->getMIMEAttachmentPDF($rawpdf);