generated from jric11/baseProject
579 lines
17 KiB
PHP
579 lines
17 KiB
PHP
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<?php
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declare(strict_types=1);
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/**
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* Output.php
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*
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* @since 2011-05-23
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* @category Library
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* @package PdfImage
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* @author Nicola Asuni <info@tecnick.com>
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* @copyright 2011-2026 Nicola Asuni - Tecnick.com LTD
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* @license https://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE)
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* @link https://github.com/tecnickcom/tc-lib-pdf-image
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*
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* This file is part of tc-lib-pdf-image software library.
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*/
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namespace Com\Tecnick\Pdf\Image;
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use Com\Tecnick\File\File as ObjFile;
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use Com\Tecnick\Pdf\Encrypt\Encrypt;
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use Com\Tecnick\Pdf\Image\Exception as ImageException;
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/**
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* Com\Tecnick\Pdf\Image\Output
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*
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* @since 2011-05-23
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* @category Library
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* @package PdfImage
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* @author Nicola Asuni <info@tecnick.com>
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* @copyright 2011-2026 Nicola Asuni - Tecnick.com LTD
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* @license https://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE)
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* @link https://github.com/tecnickcom/tc-lib-pdf-image
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*
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* @phpstan-type TFileOptions array{
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* allowedHosts?: array<string>,
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* maxRemoteSize?: int,
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* curlopts?: array<int, bool|int|string>,
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* defaultCurlOpts?: array<int, bool|int|string>,
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* fixedCurlOpts?: array<int, bool|int|string>
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* }
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*
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* @phpstan-import-type ImageBaseData from \Com\Tecnick\Pdf\Image\Import
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* @phpstan-import-type ImageRawData from \Com\Tecnick\Pdf\Image\Import
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*
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* @SuppressWarnings("PHPMD.ExcessiveClassComplexity")
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*/
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abstract class Output
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{
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/**
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* Current PDF object number.
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*/
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protected int $pon;
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/**
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* Store image object IDs for the XObject Dictionary.
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*
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* @var array<string, int>
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*/
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protected array $xobjdict = [];
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/**
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* Stack of added images.
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*
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* @var array<int, array{
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* 'iid': int,
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* 'key': string,
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* 'width': int,
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* 'height': int,
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* 'defprint': bool,
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* 'altimgs'?: array<int, int>,
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* }>
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*/
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protected array $image = [];
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/**
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* Cache used to store imported image data.
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* The same image data can be reused multiple times.
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*
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* @var array<string, ImageRawData>
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*/
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protected array $cache = [];
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/**
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* Initialize images data.
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*
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* @param float $kunit Unit of measure conversion ratio.
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* @param Encrypt $encrypt Encrypt object.
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* @param ObjFile $fileHelper File helper for image loading and writing.
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* @param bool $pdfa True if we are in PDF/A mode.
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* @param bool $compress Set to false to disable stream compression.
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* @param ?ImageCacheInterface $imageCache Optional external cache to persist processed image
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* data across instances and processes (null = disabled).
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*/
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public function __construct(
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protected float $kunit,
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protected Encrypt $encrypt,
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protected ObjFile $fileHelper,
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protected bool $pdfa = false,
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protected bool $compress = true,
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protected ?ImageCacheInterface $imageCache = null,
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) {
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$this->fileHelper = $fileHelper;
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}
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/**
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* Returns current PDF object number.
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*/
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public function getObjectNumber(): int
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{
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return $this->pon;
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}
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/**
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* Run a callback with a temporary file helper.
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*
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* @template TResult
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*
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* @param ObjFile $fileHelper Temporary file helper to use while the callback executes.
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* @param callable(): TResult $callback Callback executed with the temporary file helper.
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*
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* @return TResult
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*/
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public function withFileHelper(ObjFile $fileHelper, callable $callback): mixed
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{
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$previousFileHelper = $this->fileHelper;
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$this->fileHelper = $fileHelper;
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try {
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return $callback();
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} finally {
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$this->fileHelper = $previousFileHelper;
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}
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}
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/**
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* Get the PDF output string to print the specified image ID.
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*
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* @param int $iid Image ID.
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* @param float $xpos Abscissa (X coordinate) of the upper-left Image corner in user units.
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* @param float $ypos Ordinate (Y coordinate) of the upper-left Image corner in user units.
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* @param float $width Image width in user units.
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* @param float $height Image height in user units.
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* @param float $pageheight Page height in user units.
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*
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* @return string Image PDF page content.
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*
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* @throws \Com\Tecnick\Pdf\Image\Exception If the image ID is not found.
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*/
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public function getSetImage(
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int $iid,
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float $xpos,
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float $ypos,
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float $width,
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float $height,
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float $pageheight,
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): string {
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$img = $this->image[$iid] ?? null;
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if ($img === null) {
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throw new ImageException('Unknown image ID: ' . $iid);
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}
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$out = 'q';
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$out .= \sprintf(
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' %F 0 0 %F %F %F cm',
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$width * $this->kunit,
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$height * $this->kunit,
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$xpos * $this->kunit,
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($pageheight - $ypos - $height) * $this->kunit, // reverse coordinate
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);
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if (!isset($this->cache[$img['key']]['mask'])) {
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return $out . ' /IMG' . $iid . ' Do Q' . "\n";
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}
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if (!isset($this->cache[$img['key']]['plain'])) {
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return $out . ' /IMGmask' . $iid . ' Do Q' . "\n";
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}
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return $out . ' /IMGplain' . $iid . ' Do Q' . "\n";
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}
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/**
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* Get the PDF output string for Images.
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*
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* @param int $pon Current PDF Object Number.
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*
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* @return string PDF code for the images block.
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*
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* @throws \Com\Tecnick\Pdf\Encrypt\Exception If image object encryption fails.
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*/
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public function getOutImagesBlock(int $pon): string
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{
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$this->pon = $pon;
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$out = '';
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foreach ($this->image as $iid => $img) {
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if (!isset($this->cache[$img['key']]['out'])) {
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if (isset($this->cache[$img['key']]['mask'])) {
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/** @var ImageRawData $mask */
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$mask = &$this->cache[$img['key']]['mask'];
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$out .= $this->getOutImage($img, $mask, 'mask');
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if (isset($this->cache[$img['key']]['plain'])) {
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/** @var ImageRawData $plain */
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$plain = &$this->cache[$img['key']]['plain'];
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$out .= $this->getOutImage($img, $plain, 'plain');
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}
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}
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if (!isset($this->cache[$img['key']]['mask'])) {
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$out .= $this->getOutImage($img, $this->cache[$img['key']]);
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}
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unset($mask, $plain);
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$this->image[$iid] = $img;
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}
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if (($this->cache[$img['key']]['mask']['obj'] ?? 0) === 0) {
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$this->xobjdict['IMG' . $img['iid']] = $this->cache[$img['key']]['obj'];
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} else {
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$maskData = $this->cache[$img['key']]['mask'] ?? null;
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if ($maskData === null) {
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$this->xobjdict['IMG' . $img['iid']] = $this->cache[$img['key']]['obj'];
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continue;
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}
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$plainData = $this->cache[$img['key']]['plain'] ?? null;
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if (($plainData['obj'] ?? 0) === 0) {
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$this->xobjdict['IMGmask' . $img['iid']] = (int) $maskData['obj'];
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} elseif ($plainData !== null) {
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$this->xobjdict['IMGplain' . $img['iid']] = (int) $plainData['obj'];
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}
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}
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}
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return $out;
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}
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/**
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* Get the PDF output string for Image object.
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*
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* @param array{
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* 'iid': int,
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* 'key': string,
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* 'width': int,
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* 'height': int,
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* 'defprint': bool,
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* 'altimgs'?: array<int, int>,
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* } $img Image reference.
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* @param ImageRawData $data Image raw data.
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* @param string $sub Sub image ('mask', 'plain' or empty string).
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*
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* @return string PDF Image object.
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*
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* @throws \Com\Tecnick\Pdf\Encrypt\Exception If image data encryption fails.
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*/
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protected function getOutImage(array &$img, array &$data, string $sub = ''): string
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{
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$out = $this->getOutIcc($data) . $this->getOutPalette($data) . $this->getOutAltImages($img, $data, $sub);
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$data['obj'] = ++$this->pon;
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$out .=
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$data['obj']
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. ' 0 obj'
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. "\n"
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. '<<'
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. ' /Type /XObject'
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. ' /Subtype /Image'
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. ' /Width '
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. $data['width']
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. ' /Height '
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. $data['height']
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. $this->getOutColorInfo($data);
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if ($data['exturl']) {
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// external stream
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$out .=
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' /Length 0 /F'
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. ' <<'
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. ' /FS /URL /F '
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. $this->encrypt->escapeDataString('true', $this->pon)
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. ' >>';
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if ($data['filter'] !== '') {
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$out .= ' /FFilter /' . $data['filter'];
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}
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$out .= ' >>' . "\n";
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} else {
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if ($data['filter'] !== '') {
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$out .= ' /Filter /' . $data['filter'];
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}
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if ($data['parms'] !== '') {
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$out .= ' ' . $data['parms'];
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}
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// Colour Key Masking
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if ($data['trns'] !== []) {
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$trns = $this->getOutTransparency($data);
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if ($trns !== '') {
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$out .= ' /Mask [ ' . $trns . ']';
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}
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}
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$stream = $this->encrypt->encryptString($data['data'], $this->pon);
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$out .= ' /Length ' . \strlen($stream) . '>> stream' . "\n" . $stream . "\n" . 'endstream' . "\n";
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}
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$out .= 'endobj' . "\n";
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$this->cache[$img['key']]['out'] = true; // mark this as done
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return $out;
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}
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/**
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* Return XObjects Dictionary portion for the images.
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*/
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public function getXobjectDict(): string
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{
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$out = '';
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foreach ($this->xobjdict as $iid => $objid) {
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$out .= ' /' . $iid . ' ' . $objid . ' 0 R';
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}
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return $out;
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||
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}
|
||
|
|
|
||
|
|
/**
|
||
|
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* Return XObjects Dictionary.
|
||
|
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*
|
||
|
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* @param array<int> $keys Image IDs.
|
||
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*/
|
||
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public function getXobjectDictByKeys(array $keys): string
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||
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{
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||
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if ($keys === []) {
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return '';
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||
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}
|
||
|
|
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||
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$out = '';
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||
|
|
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foreach ($keys as $iid) {
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$key = 'IMG' . $iid;
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if (isset($this->xobjdict[$key])) {
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$out .= ' /' . $key . ' ' . $this->xobjdict[$key] . ' 0 R';
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continue;
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}
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$key = 'IMGplain' . $iid;
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||
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if (isset($this->xobjdict[$key])) {
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||
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$out .= ' /' . $key . ' ' . $this->xobjdict[$key] . ' 0 R';
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||
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continue;
|
||
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}
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||
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$key = 'IMGmask' . $iid;
|
||
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if (isset($this->xobjdict[$key])) {
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||
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$out .= ' /' . $key . ' ' . $this->xobjdict[$key] . ' 0 R';
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||
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continue;
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||
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}
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||
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}
|
||
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||
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return $out;
|
||
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}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the PDF output string for ICC object.
|
||
|
|
*
|
||
|
|
* @param ImageRawData $data Image raw data.
|
||
|
|
*
|
||
|
|
* @throws \Com\Tecnick\Pdf\Encrypt\Exception If ICC profile encryption fails.
|
||
|
|
*/
|
||
|
|
protected function getOutIcc(array &$data): string
|
||
|
|
{
|
||
|
|
if ($data['icc'] === '') {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
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$data['obj_icc'] = ++$this->pon;
|
||
|
|
$out =
|
||
|
|
$data['obj_icc']
|
||
|
|
. ' 0 obj'
|
||
|
|
. "\n"
|
||
|
|
. '<<'
|
||
|
|
. ' /N '
|
||
|
|
. $data['channels']
|
||
|
|
. ' /Alternate /'
|
||
|
|
. $data['colspace'];
|
||
|
|
$icc = $data['icc'];
|
||
|
|
if ($this->compress) {
|
||
|
|
$out .= ' /Filter /FlateDecode';
|
||
|
|
$cicc = \gzcompress($icc);
|
||
|
|
if ($cicc !== false) {
|
||
|
|
$icc = $cicc;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$stream = $this->encrypt->encryptString($icc, $this->pon);
|
||
|
|
return (
|
||
|
|
$out . (
|
||
|
|
' /Length '
|
||
|
|
. \strlen($stream)
|
||
|
|
. ' >>'
|
||
|
|
. ' stream'
|
||
|
|
. "\n"
|
||
|
|
. $stream
|
||
|
|
. "\n"
|
||
|
|
. 'endstream'
|
||
|
|
. "\n"
|
||
|
|
. 'endobj'
|
||
|
|
. "\n"
|
||
|
|
)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the PDF output string for Indexed palette object.
|
||
|
|
*
|
||
|
|
* @param ImageRawData $data Image raw data.
|
||
|
|
*
|
||
|
|
* @throws \Com\Tecnick\Pdf\Encrypt\Exception If palette encryption fails.
|
||
|
|
*/
|
||
|
|
protected function getOutPalette(array &$data): string
|
||
|
|
{
|
||
|
|
if ($data['colspace'] !== 'Indexed') {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
$data['obj_pal'] = ++$this->pon;
|
||
|
|
$out = $data['obj_pal'] . ' 0 obj' . "\n" . '<<';
|
||
|
|
$pal = $data['pal'];
|
||
|
|
if ($this->compress) {
|
||
|
|
$out .= '/Filter /FlateDecode';
|
||
|
|
$cpal = \gzcompress($pal);
|
||
|
|
if ($cpal !== false) {
|
||
|
|
$pal = $cpal;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$stream = $this->encrypt->encryptString($pal, $this->pon);
|
||
|
|
return (
|
||
|
|
$out . (
|
||
|
|
' /Length '
|
||
|
|
. \strlen($stream)
|
||
|
|
. '>>'
|
||
|
|
. ' stream'
|
||
|
|
. "\n"
|
||
|
|
. $stream
|
||
|
|
. "\n"
|
||
|
|
. 'endstream'
|
||
|
|
. "\n"
|
||
|
|
. 'endobj'
|
||
|
|
. "\n"
|
||
|
|
)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the PDF output string for color and mask information.
|
||
|
|
*
|
||
|
|
* @param ImageRawData $data Image raw data.
|
||
|
|
*/
|
||
|
|
protected function getOutColorInfo(array $data): string
|
||
|
|
{
|
||
|
|
$out = '';
|
||
|
|
// set color space
|
||
|
|
if ($data['obj_icc'] !== 0) {
|
||
|
|
// ICC Colour Space
|
||
|
|
$out .= ' /ColorSpace [/ICCBased ' . $data['obj_icc'] . ' 0 R]';
|
||
|
|
} elseif ($data['obj_pal'] !== 0) {
|
||
|
|
// Indexed Colour Space
|
||
|
|
$out .=
|
||
|
|
' /ColorSpace [/Indexed /DeviceRGB '
|
||
|
|
. ((\strlen($data['pal']) / 3) - 1)
|
||
|
|
. ' '
|
||
|
|
. $data['obj_pal']
|
||
|
|
. ' 0 R]';
|
||
|
|
} else {
|
||
|
|
// Device Colour Space
|
||
|
|
$out .= ' /ColorSpace /' . $data['colspace'];
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($data['colspace'] === 'DeviceCMYK') {
|
||
|
|
$out .= ' /Decode [1 0 1 0 1 0 1 0]';
|
||
|
|
}
|
||
|
|
|
||
|
|
$out .= ' /BitsPerComponent ' . $data['bits'];
|
||
|
|
|
||
|
|
$maskobj = (int) ($this->cache[$data['key']]['mask']['obj'] ?? 0);
|
||
|
|
if (!$data['ismask'] && $maskobj > 0) {
|
||
|
|
$out .= ' /SMask ' . $maskobj . ' 0 R';
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($data['obj_alt'] !== 0) {
|
||
|
|
// reference to alternate images dictionary
|
||
|
|
$out .= ' /Alternates ' . $data['obj_alt'] . ' 0 R';
|
||
|
|
}
|
||
|
|
|
||
|
|
return $out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the PDF output string for Alternate images object.
|
||
|
|
*
|
||
|
|
* @param array{
|
||
|
|
* 'iid': int,
|
||
|
|
* 'key': string,
|
||
|
|
* 'width': int,
|
||
|
|
* 'height': int,
|
||
|
|
* 'defprint': bool,
|
||
|
|
* 'altimgs'?: array<int, int>,
|
||
|
|
* } $img Image reference.
|
||
|
|
* @param ImageRawData $data Image raw data.
|
||
|
|
* @param string $sub Sub image ('mask', 'plain' or empty string).
|
||
|
|
*/
|
||
|
|
protected function getOutAltImages(array $img, array &$data, string $sub = ''): string
|
||
|
|
{
|
||
|
|
if ($this->pdfa || !isset($img['altimgs']) || $img['altimgs'] === [] || $sub === 'mask') {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
$data['obj_alt'] = ++$this->pon;
|
||
|
|
|
||
|
|
$out = $this->pon . ' 0 obj' . "\n" . '[';
|
||
|
|
foreach ($img['altimgs'] as $iid) {
|
||
|
|
$altimg = $this->image[$iid] ?? null;
|
||
|
|
if ($altimg === null) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
$altobj = (int) ($this->cache[$altimg['key']]['obj'] ?? 0);
|
||
|
|
if ($altobj === 0) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
$out .=
|
||
|
|
' << /Image '
|
||
|
|
. $altobj
|
||
|
|
. ' 0 R'
|
||
|
|
. ' /DefaultForPrinting '
|
||
|
|
. ($altimg['defprint'] ? 'true' : 'false')
|
||
|
|
. ' >>';
|
||
|
|
}
|
||
|
|
|
||
|
|
return $out . (' ]' . "\n" . 'endobj' . "\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the PDF output string for color transparency.
|
||
|
|
*
|
||
|
|
* @param ImageRawData $data Image raw data.
|
||
|
|
*/
|
||
|
|
protected function getOutTransparency(array $data): string
|
||
|
|
{
|
||
|
|
$trns = '';
|
||
|
|
|
||
|
|
if ($data['colspace'] === 'Indexed') {
|
||
|
|
// Indexed: trns holds one alpha byte per palette entry; mask the
|
||
|
|
// fully-transparent entries (alpha 0) by their palette index.
|
||
|
|
foreach ($data['trns'] as $idx => $val) {
|
||
|
|
if ($val !== 0) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
$trns .= $idx . ' ' . $idx . ' ';
|
||
|
|
}
|
||
|
|
|
||
|
|
return $trns;
|
||
|
|
}
|
||
|
|
|
||
|
|
// DeviceRGB / DeviceGray: trns holds the transparent colour sample
|
||
|
|
// values themselves, emitted as single-value colour-key ranges.
|
||
|
|
foreach ($data['trns'] as $val) {
|
||
|
|
$trns .= $val . ' ' . $val . ' ';
|
||
|
|
}
|
||
|
|
|
||
|
|
return $trns;
|
||
|
|
}
|
||
|
|
}
|