GraphicalFunctions.php 120 KB
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<?php
namespace TYPO3\CMS\Core\Imaging;

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/*
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 * This file is part of the TYPO3 CMS project.
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 *
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 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
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 *
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 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
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 *
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 * The TYPO3 project - inspiring people to share!
 */
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use TYPO3\CMS\Core\Cache\CacheManager;
use TYPO3\CMS\Core\Charset\CharsetConverter;
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use TYPO3\CMS\Core\Utility\ArrayUtility;
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use TYPO3\CMS\Core\Utility\CommandUtility;
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use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
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use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Utility\MathUtility;

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/**
 * Standard graphical functions
 *
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 * Class contains a bunch of cool functions for manipulating graphics with GDlib/Freetype and ImageMagick.
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 * VERY OFTEN used with gifbuilder that extends this class and provides a TypoScript API to using these functions
 */
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class GraphicalFunctions
{
    /**
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     * If set, the frame pointer is appended to the filenames.
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     *
     * @var bool
     */
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    public $addFrameSelection = true;
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    /**
     * This should be changed to 'png' if you want this class to read/make PNG-files instead!
     *
     * @var string
     */
    public $gifExtension = 'gif';

    /**
     * File formats supported by gdlib. This variable get's filled in "init" method
     *
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     * @var array
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     */
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    protected $gdlibExtensions = [];
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    /**
     * defines the RGB colorspace to use
     *
     * @var string
     */
    protected $colorspace = 'RGB';

    /**
     * colorspace names allowed
     *
     * @var array
     */
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    protected $allowedColorSpaceNames = [
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        'CMY',
        'CMYK',
        'Gray',
        'HCL',
        'HSB',
        'HSL',
        'HWB',
        'Lab',
        'LCH',
        'LMS',
        'Log',
        'Luv',
        'OHTA',
        'Rec601Luma',
        'Rec601YCbCr',
        'Rec709Luma',
        'Rec709YCbCr',
        'RGB',
        'sRGB',
        'Transparent',
        'XYZ',
        'YCbCr',
        'YCC',
        'YIQ',
        'YCbCr',
        'YUV'
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    ];
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    /**
     * 16777216 Colors is the maximum value for PNG, JPEG truecolor images (24-bit, 8-bit / Channel)
     *
     * @var int
     */
    public $truecolorColors = 16777215;

    /**
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     * Allowed file extensions perceived as images by TYPO3.
     * List should be set to 'gif,png,jpeg,jpg' if IM is not available.
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     *
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     * @var array
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     */
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    protected $imageFileExt = ['gif', 'jpg', 'jpeg', 'png', 'tif', 'bmp', 'tga', 'pcx', 'ai', 'pdf'];
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    /**
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     * Web image extensions (can be shown by a webbrowser)
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     *
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     * @var array
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     */
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    protected $webImageExt = ['gif', 'jpg', 'jpeg', 'png'];
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    /**
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     * Enable ImageMagick effects, disabled by default as IM5+ effects slow down the image generation
     *
     * @var bool
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     */
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    protected $processorEffectsEnabled = false;
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    /**
     * @var array
     */
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    public $cmds = [
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        'jpg' => '',
        'jpeg' => '',
        'gif' => '',
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        'png' => ''
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    ];
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    /**
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     * @var bool
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     */
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    protected $NO_IMAGE_MAGICK = false;
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    /**
     * @var bool
     */
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    protected $mayScaleUp = true;
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    /**
     * Filename prefix for images scaled in imageMagickConvert()
     *
     * @var string
     */
    public $filenamePrefix = '';

    /**
     * Forcing the output filename of imageMagickConvert() to this value. However after calling imageMagickConvert() it will be set blank again.
     *
     * @var string
     */
    public $imageMagickConvert_forceFileNameBody = '';

    /**
     * This flag should always be FALSE. If set TRUE, imageMagickConvert will always write a new file to the tempdir! Used for debugging.
     *
     * @var bool
     */
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    public $dontCheckForExistingTempFile = false;
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    /**
     * Prevents imageMagickConvert() from compressing the gif-files with self::gifCompress()
     *
     * @var bool
     */
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    public $dontCompress = false;
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    /**
     * For debugging only.
     * Filenames will not be based on mtime and only filename (not path) will be used.
     * This key is also included in the hash of the filename...
     *
     * @var string
     */
    public $alternativeOutputKey = '';

    /**
     * All ImageMagick commands executed is stored in this array for tracking. Used by the Install Tools Image section
     *
     * @var array
     */
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    public $IM_commands = [];
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    /**
     * @var array
     */
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    public $workArea = [];
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    /**
     * Preserve the alpha transparency layer of read PNG images
     *
     * @var bool
     */
    protected $saveAlphaLayer = false;

    /**
     * ImageMagick scaling command; "-geometry" or "-sample". Used in makeText() and imageMagickConvert()
     *
     * @var string
     */
    public $scalecmd = '-geometry';

    /**
     * Used by v5_blur() to simulate 10 continuous steps of blurring
     *
     * @var string
     */
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    protected $im5fx_blurSteps = '1x2,2x2,3x2,4x3,5x3,5x4,6x4,7x5,8x5,9x5';
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    /**
     * Used by v5_sharpen() to simulate 10 continuous steps of sharpening.
     *
     * @var string
     */
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    protected $im5fx_sharpenSteps = '1x2,2x2,3x2,2x3,3x3,4x3,3x4,4x4,4x5,5x5';
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    /**
     * This is the limit for the number of pixels in an image before it will be rendered as JPG instead of GIF/PNG
     *
     * @var int
     */
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    protected $pixelLimitGif = 10000;
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    /**
     * Array mapping HTML color names to RGB values.
     *
     * @var array
     */
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    protected $colMap = [
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        'aqua' => [0, 255, 255],
        'black' => [0, 0, 0],
        'blue' => [0, 0, 255],
        'fuchsia' => [255, 0, 255],
        'gray' => [128, 128, 128],
        'green' => [0, 128, 0],
        'lime' => [0, 255, 0],
        'maroon' => [128, 0, 0],
        'navy' => [0, 0, 128],
        'olive' => [128, 128, 0],
        'purple' => [128, 0, 128],
        'red' => [255, 0, 0],
        'silver' => [192, 192, 192],
        'teal' => [0, 128, 128],
        'yellow' => [255, 255, 0],
        'white' => [255, 255, 255]
    ];
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    /**
     * Charset conversion object:
     *
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     * @var CharsetConverter
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     */
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    protected $csConvObj;
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    /**
     * @var int
     */
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    protected $jpegQuality = 85;
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    /**
     * @var string
     */
    public $map = '';

    /**
     * This holds the operational setup.
     * Basically this is a TypoScript array with properties.
     *
     * @var array
     */
    public $setup = [];

    /**
     * @var int
     */
    public $w = 0;

    /**
     * @var int
     */
    public $h = 0;

    /**
     * @var array
     */
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    protected $OFFSET;
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    /**
     * @var resource
     */
    protected $im;

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    /**
     * Init function. Must always call this when using the class.
     * This function will read the configuration information from $GLOBALS['TYPO3_CONF_VARS']['GFX'] can set some values in internal variables.
     */
    public function init()
    {
        $gfxConf = $GLOBALS['TYPO3_CONF_VARS']['GFX'];
        if (function_exists('imagecreatefromjpeg') && function_exists('imagejpeg')) {
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            $this->gdlibExtensions[] = 'jpg';
            $this->gdlibExtensions[] = 'jpeg';
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        }
        if (function_exists('imagecreatefrompng') && function_exists('imagepng')) {
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            $this->gdlibExtensions[] = 'png';
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        }
        if (function_exists('imagecreatefromgif') && function_exists('imagegif')) {
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            $this->gdlibExtensions[] = 'gif';
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        }

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        if ($gfxConf['processor_colorspace'] && in_array($gfxConf['processor_colorspace'], $this->allowedColorSpaceNames, true)) {
            $this->colorspace = $gfxConf['processor_colorspace'];
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        }

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        if (!$gfxConf['processor_enabled']) {
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            $this->NO_IMAGE_MAGICK = true;
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        }
        // Setting default JPG parameters:
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        $this->jpegQuality = MathUtility::forceIntegerInRange($gfxConf['jpg_quality'], 10, 100, 85);
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        $this->addFrameSelection = (bool)$gfxConf['processor_allowFrameSelection'];
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        if ($gfxConf['gdlib_png']) {
            $this->gifExtension = 'png';
        }
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        $this->imageFileExt = GeneralUtility::trimExplode(',', $gfxConf['imagefile_ext']);
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        // Boolean. This is necessary if using ImageMagick 5+.
        // Effects in Imagemagick 5+ tends to render very slowly!!
        // - therefore must be disabled in order not to perform sharpen, blurring and such.
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        $this->cmds['jpg'] = $this->cmds['jpeg'] = '-colorspace ' . $this->colorspace . ' -quality ' . $this->jpegQuality;
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        // ... but if 'processor_effects' is set, enable effects
        if ($gfxConf['processor_effects']) {
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            $this->processorEffectsEnabled = true;
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            $this->cmds['jpg'] .= $this->v5_sharpen(10);
            $this->cmds['jpeg'] .= $this->v5_sharpen(10);
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        }
        // Secures that images are not scaled up.
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        $this->mayScaleUp = (bool)$gfxConf['processor_allowUpscaling'];
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        $this->csConvObj = GeneralUtility::makeInstance(CharsetConverter::class);
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    }

    /*************************************************
     *
     * Layering images / "IMAGE" GIFBUILDER object
     *
     *************************************************/
    /**
     * Implements the "IMAGE" GIFBUILDER object, when the "mask" property is TRUE.
     * It reads the two images defined by $conf['file'] and $conf['mask'] and copies the $conf['file'] onto the input image pointer image using the $conf['mask'] as a grayscale mask
     * The operation involves ImageMagick for combining.
     *
     * @param resource $im GDlib image pointer
     * @param array $conf TypoScript array with configuration for the GIFBUILDER object.
     * @param array $workArea The current working area coordinates.
     * @see \TYPO3\CMS\Frontend\Imaging\GifBuilder::make()
     */
    public function maskImageOntoImage(&$im, $conf, $workArea)
    {
        if ($conf['file'] && $conf['mask']) {
            $imgInf = pathinfo($conf['file']);
            $imgExt = strtolower($imgInf['extension']);
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            if (!in_array($imgExt, $this->gdlibExtensions, true)) {
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                $BBimage = $this->imageMagickConvert($conf['file'], $this->gifExtension);
            } else {
                $BBimage = $this->getImageDimensions($conf['file']);
            }
            $maskInf = pathinfo($conf['mask']);
            $maskExt = strtolower($maskInf['extension']);
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            if (!in_array($maskExt, $this->gdlibExtensions, true)) {
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                $BBmask = $this->imageMagickConvert($conf['mask'], $this->gifExtension);
            } else {
                $BBmask = $this->getImageDimensions($conf['mask']);
            }
            if ($BBimage && $BBmask) {
                $w = imagesx($im);
                $h = imagesy($im);
                $tmpStr = $this->randomName();
                $theImage = $tmpStr . '_img.' . $this->gifExtension;
                $theDest = $tmpStr . '_dest.' . $this->gifExtension;
                $theMask = $tmpStr . '_mask.' . $this->gifExtension;
                // Prepare overlay image
                $cpImg = $this->imageCreateFromFile($BBimage[3]);
                $destImg = imagecreatetruecolor($w, $h);
                // Preserve alpha transparency
                if ($this->saveAlphaLayer) {
                    imagesavealpha($destImg, true);
                    $Bcolor = imagecolorallocatealpha($destImg, 0, 0, 0, 127);
                    imagefill($destImg, 0, 0, $Bcolor);
                } else {
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                    $Bcolor = imagecolorallocate($destImg, 0, 0, 0);
                    imagefilledrectangle($destImg, 0, 0, $w, $h, $Bcolor);
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                }
                $this->copyGifOntoGif($destImg, $cpImg, $conf, $workArea);
                $this->ImageWrite($destImg, $theImage);
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                imagedestroy($cpImg);
                imagedestroy($destImg);
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                // Prepare mask image
                $cpImg = $this->imageCreateFromFile($BBmask[3]);
                $destImg = imagecreatetruecolor($w, $h);
                if ($this->saveAlphaLayer) {
                    imagesavealpha($destImg, true);
                    $Bcolor = imagecolorallocatealpha($destImg, 0, 0, 0, 127);
                    imagefill($destImg, 0, 0, $Bcolor);
                } else {
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                    $Bcolor = imagecolorallocate($destImg, 0, 0, 0);
                    imagefilledrectangle($destImg, 0, 0, $w, $h, $Bcolor);
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                }
                $this->copyGifOntoGif($destImg, $cpImg, $conf, $workArea);
                $this->ImageWrite($destImg, $theMask);
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                imagedestroy($cpImg);
                imagedestroy($destImg);
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                // Mask the images
                $this->ImageWrite($im, $theDest);
                // Let combineExec handle maskNegation
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                $this->combineExec($theDest, $theImage, $theMask, $theDest);
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                // The main image is loaded again...
                $backIm = $this->imageCreateFromFile($theDest);
                // ... and if nothing went wrong we load it onto the old one.
                if ($backIm) {
                    if (!$this->saveAlphaLayer) {
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                        imagecolortransparent($backIm, -1);
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                    }
                    $im = $backIm;
                }
                // Unlink files from process
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                unlink($theDest);
                unlink($theImage);
                unlink($theMask);
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            }
        }
    }

    /**
     * Implements the "IMAGE" GIFBUILDER object, when the "mask" property is FALSE (using only $conf['file'])
     *
     * @param resource $im GDlib image pointer
     * @param array $conf TypoScript array with configuration for the GIFBUILDER object.
     * @param array $workArea The current working area coordinates.
     * @see \TYPO3\CMS\Frontend\Imaging\GifBuilder::make(), maskImageOntoImage()
     */
    public function copyImageOntoImage(&$im, $conf, $workArea)
    {
        if ($conf['file']) {
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            if (!in_array($conf['BBOX'][2], $this->gdlibExtensions, true)) {
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                $conf['BBOX'] = $this->imageMagickConvert($conf['BBOX'][3], $this->gifExtension);
                $conf['file'] = $conf['BBOX'][3];
            }
            $cpImg = $this->imageCreateFromFile($conf['file']);
            $this->copyGifOntoGif($im, $cpImg, $conf, $workArea);
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            imagedestroy($cpImg);
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        }
    }

    /**
     * Copies two GDlib image pointers onto each other, using TypoScript configuration from $conf and the input $workArea definition.
     *
     * @param resource $im GDlib image pointer, destination (bottom image)
     * @param resource $cpImg GDlib image pointer, source (top image)
     * @param array $conf TypoScript array with the properties for the IMAGE GIFBUILDER object. Only used for the "tile" property value.
     * @param array $workArea Work area
     * @access private
     */
    public function copyGifOntoGif(&$im, $cpImg, $conf, $workArea)
    {
        $cpW = imagesx($cpImg);
        $cpH = imagesy($cpImg);
        $tile = GeneralUtility::intExplode(',', $conf['tile']);
        $tile[0] = MathUtility::forceIntegerInRange($tile[0], 1, 20);
        $tile[1] = MathUtility::forceIntegerInRange($tile[1], 1, 20);
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        $cpOff = $this->objPosition($conf, $workArea, [$cpW * $tile[0], $cpH * $tile[1]]);
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        for ($xt = 0; $xt < $tile[0]; $xt++) {
            $Xstart = $cpOff[0] + $cpW * $xt;
            // If this image is inside of the workArea, then go on
            if ($Xstart + $cpW > $workArea[0]) {
                // X:
                if ($Xstart < $workArea[0]) {
                    $cpImgCutX = $workArea[0] - $Xstart;
                    $Xstart = $workArea[0];
                } else {
                    $cpImgCutX = 0;
                }
                $w = $cpW - $cpImgCutX;
                if ($Xstart > $workArea[0] + $workArea[2] - $w) {
                    $w = $workArea[0] + $workArea[2] - $Xstart;
                }
                // If this image is inside of the workArea, then go on
                if ($Xstart < $workArea[0] + $workArea[2]) {
                    // Y:
                    for ($yt = 0; $yt < $tile[1]; $yt++) {
                        $Ystart = $cpOff[1] + $cpH * $yt;
                        // If this image is inside of the workArea, then go on
                        if ($Ystart + $cpH > $workArea[1]) {
                            if ($Ystart < $workArea[1]) {
                                $cpImgCutY = $workArea[1] - $Ystart;
                                $Ystart = $workArea[1];
                            } else {
                                $cpImgCutY = 0;
                            }
                            $h = $cpH - $cpImgCutY;
                            if ($Ystart > $workArea[1] + $workArea[3] - $h) {
                                $h = $workArea[1] + $workArea[3] - $Ystart;
                            }
                            // If this image is inside of the workArea, then go on
                            if ($Ystart < $workArea[1] + $workArea[3]) {
                                $this->imagecopyresized($im, $cpImg, $Xstart, $Ystart, $cpImgCutX, $cpImgCutY, $w, $h, $w, $h);
                            }
                        }
                    }
                }
            }
        }
    }

    /**
     * Alternative function for using the similar PHP function imagecopyresized(). Used for GD2 only.
     *
     * OK, the reason for this stupid fix is the following story:
     * GD1.x was capable of copying two images together and combining their palettes! GD2 is apparently not.
     * With GD2 only the palette of the dest-image is used which mostly results in totally black images when trying to
     * copy a color-ful image onto the destination.
     * The GD2-fix is to
     * 1) Create a blank TRUE-COLOR image
     * 2) Copy the destination image onto that one
     * 3) Then do the actual operation; Copying the source (top image) onto that
     * 4) ... and return the result pointer.
     * 5) Reduce colors (if we do not, the result may become strange!)
     * It works, but the resulting images is now a true-color PNG which may be very large.
     * So, why not use 'imagetruecolortopalette ($im, TRUE, 256)' - well because it does NOT WORK! So simple is that.
     *
     * @param resource $dstImg Destination image
     * @param resource $srcImg Source image
     * @param int $dstX Destination x-coordinate
     * @param int $dstY Destination y-coordinate
     * @param int $srcX Source x-coordinate
     * @param int $srcY Source y-coordinate
     * @param int $dstWidth Destination width
     * @param int $dstHeight Destination height
     * @param int $srcWidth Source width
     * @param int $srcHeight Source height
     * @access private
     */
    public function imagecopyresized(&$dstImg, $srcImg, $dstX, $dstY, $srcX, $srcY, $dstWidth, $dstHeight, $srcWidth, $srcHeight)
    {
        if (!$this->saveAlphaLayer) {
            // Make true color image
            $tmpImg = imagecreatetruecolor(imagesx($dstImg), imagesy($dstImg));
            // Copy the source image onto that
            imagecopyresized($tmpImg, $dstImg, 0, 0, 0, 0, imagesx($dstImg), imagesy($dstImg), imagesx($dstImg), imagesy($dstImg));
            // Then copy the source image onto that (the actual operation!)
            imagecopyresized($tmpImg, $srcImg, $dstX, $dstY, $srcX, $srcY, $dstWidth, $dstHeight, $srcWidth, $srcHeight);
            // Set the destination image
            $dstImg = $tmpImg;
        } else {
            imagecopyresized($dstImg, $srcImg, $dstX, $dstY, $srcX, $srcY, $dstWidth, $dstHeight, $srcWidth, $srcHeight);
        }
    }

    /********************************
     *
     * Text / "TEXT" GIFBUILDER object
     *
     ********************************/
    /**
     * Implements the "TEXT" GIFBUILDER object
     *
     * @param resource $im GDlib image pointer
     * @param array $conf TypoScript array with configuration for the GIFBUILDER object.
     * @param array $workArea The current working area coordinates.
     * @see \TYPO3\CMS\Frontend\Imaging\GifBuilder::make()
     */
    public function makeText(&$im, $conf, $workArea)
    {
        // Spacing
        list($spacing, $wordSpacing) = $this->calcWordSpacing($conf);
        // Position
        $txtPos = $this->txtPosition($conf, $workArea, $conf['BBOX']);
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        $theText = $conf['text'];
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        if ($conf['imgMap'] && is_array($conf['imgMap.'])) {
            $this->addToMap($this->calcTextCordsForMap($conf['BBOX'][2], $txtPos, $conf['imgMap.']), $conf['imgMap.']);
        }
        if (!$conf['hideButCreateMap']) {
            // Font Color:
            $cols = $this->convertColor($conf['fontColor']);
            // NiceText is calculated
            if (!$conf['niceText']) {
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                $Fcolor = imagecolorallocate($im, $cols[0], $cols[1], $cols[2]);
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                // antiAliasing is setup:
                $Fcolor = $conf['antiAlias'] ? $Fcolor : -$Fcolor;
                for ($a = 0; $a < $conf['iterations']; $a++) {
                    // If any kind of spacing applys, we use this function:
                    if ($spacing || $wordSpacing) {
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                        $this->SpacedImageTTFText($im, $conf['fontSize'], $conf['angle'], $txtPos[0], $txtPos[1], $Fcolor, GeneralUtility::getFileAbsFileName($conf['fontFile']), $theText, $spacing, $wordSpacing, $conf['splitRendering.']);
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                    } else {
                        $this->renderTTFText($im, $conf['fontSize'], $conf['angle'], $txtPos[0], $txtPos[1], $Fcolor, $conf['fontFile'], $theText, $conf['splitRendering.'], $conf);
                    }
                }
            } else {
                // NICETEXT::
                // options anti_aliased and iterations is NOT available when doing this!!
                $w = imagesx($im);
                $h = imagesy($im);
                $tmpStr = $this->randomName();
                $fileMenu = $tmpStr . '_menuNT.' . $this->gifExtension;
                $fileColor = $tmpStr . '_colorNT.' . $this->gifExtension;
                $fileMask = $tmpStr . '_maskNT.' . $this->gifExtension;
                // Scalefactor
                $sF = MathUtility::forceIntegerInRange($conf['niceText.']['scaleFactor'], 2, 5);
                $newW = ceil($sF * imagesx($im));
                $newH = ceil($sF * imagesy($im));
                // Make mask
                $maskImg = imagecreatetruecolor($newW, $newH);
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                $Bcolor = imagecolorallocate($maskImg, 255, 255, 255);
                imagefilledrectangle($maskImg, 0, 0, $newW, $newH, $Bcolor);
                $Fcolor = imagecolorallocate($maskImg, 0, 0, 0);
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                // If any kind of spacing applies, we use this function:
                if ($spacing || $wordSpacing) {
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                    $this->SpacedImageTTFText($maskImg, $conf['fontSize'], $conf['angle'], $txtPos[0], $txtPos[1], $Fcolor, GeneralUtility::getFileAbsFileName($conf['fontFile']), $theText, $spacing, $wordSpacing, $conf['splitRendering.'], $sF);
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                } else {
                    $this->renderTTFText($maskImg, $conf['fontSize'], $conf['angle'], $txtPos[0], $txtPos[1], $Fcolor, $conf['fontFile'], $theText, $conf['splitRendering.'], $conf, $sF);
                }
                $this->ImageWrite($maskImg, $fileMask);
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                imagedestroy($maskImg);
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                // Downscales the mask
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                if (!$this->processorEffectsEnabled) {
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                    $command = trim($this->scalecmd . ' ' . $w . 'x' . $h . '! -negate');
                } else {
                    $command = trim($conf['niceText.']['before'] . ' ' . $this->scalecmd . ' ' . $w . 'x' . $h . '! ' . $conf['niceText.']['after'] . ' -negate');
                    if ($conf['niceText.']['sharpen']) {
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                        $command .= $this->v5_sharpen($conf['niceText.']['sharpen']);
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                    }
                }
                $this->imageMagickExec($fileMask, $fileMask, $command);
                // Make the color-file
                $colorImg = imagecreatetruecolor($w, $h);
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                $Ccolor = imagecolorallocate($colorImg, $cols[0], $cols[1], $cols[2]);
                imagefilledrectangle($colorImg, 0, 0, $w, $h, $Ccolor);
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                $this->ImageWrite($colorImg, $fileColor);
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                imagedestroy($colorImg);
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                // The mask is applied
                // The main pictures is saved temporarily
                $this->ImageWrite($im, $fileMenu);
                $this->combineExec($fileMenu, $fileColor, $fileMask, $fileMenu);
                // The main image is loaded again...
                $backIm = $this->imageCreateFromFile($fileMenu);
                // ... and if nothing went wrong we load it onto the old one.
                if ($backIm) {
                    if (!$this->saveAlphaLayer) {
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                        imagecolortransparent($backIm, -1);
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                    }
                    $im = $backIm;
                }
                // Deleting temporary files;
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                unlink($fileMenu);
                unlink($fileColor);
                unlink($fileMask);
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            }
        }
    }

    /**
     * Calculates text position for printing the text onto the image based on configuration like alignment and workarea.
     *
     * @param array $conf TypoScript array for the TEXT GIFBUILDER object
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     * @param array $workArea Work area definition
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     * @param array $BB Bounding box information, was set in \TYPO3\CMS\Frontend\Imaging\GifBuilder::start()
     * @return array [0]=x, [1]=y, [2]=w, [3]=h
     * @access private
     * @see makeText()
     */
    public function txtPosition($conf, $workArea, $BB)
    {
        $angle = (int)$conf['angle'] / 180 * pi();
        $conf['angle'] = 0;
        $straightBB = $this->calcBBox($conf);
        // offset, align, valign, workarea
        // [0]=x, [1]=y, [2]=w, [3]=h
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        $result = [];
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        $result[2] = $BB[0];
        $result[3] = $BB[1];
        $w = $workArea[2];
        switch ($conf['align']) {
            case 'right':

            case 'center':
                $factor = abs(cos($angle));
                $sign = cos($angle) < 0 ? -1 : 1;
                $len1 = $sign * $factor * $straightBB[0];
                $len2 = $sign * $BB[0];
                $result[0] = $w - ceil(($len2 * $factor + (1 - $factor) * $len1));
                $factor = abs(sin($angle));
                $sign = sin($angle) < 0 ? -1 : 1;
                $len1 = $sign * $factor * $straightBB[0];
                $len2 = $sign * $BB[1];
                $result[1] = ceil($len2 * $factor + (1 - $factor) * $len1);
                break;
        }
        switch ($conf['align']) {
            case 'right':
                break;
            case 'center':
                $result[0] = round($result[0] / 2);
                $result[1] = round($result[1] / 2);
                break;
            default:
                $result[0] = 0;
                $result[1] = 0;
        }
        $result = $this->applyOffset($result, GeneralUtility::intExplode(',', $conf['offset']));
        $result = $this->applyOffset($result, $workArea);
        return $result;
    }

    /**
     * Calculates bounding box information for the TEXT GIFBUILDER object.
     *
     * @param array $conf TypoScript array for the TEXT GIFBUILDER object
     * @return array Array with three keys [0]/[1] being x/y and [2] being the bounding box array
     * @access private
     * @see txtPosition(), \TYPO3\CMS\Frontend\Imaging\GifBuilder::start()
     */
    public function calcBBox($conf)
    {
        $sF = $this->getTextScalFactor($conf);
        list($spacing, $wordSpacing) = $this->calcWordSpacing($conf, $sF);
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        $theText = $conf['text'];
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        $charInf = $this->ImageTTFBBoxWrapper($conf['fontSize'], $conf['angle'], $conf['fontFile'], $theText, $conf['splitRendering.'], $sF);
        $theBBoxInfo = $charInf;
        if ($conf['angle']) {
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            $xArr = [$charInf[0], $charInf[2], $charInf[4], $charInf[6]];
            $yArr = [$charInf[1], $charInf[3], $charInf[5], $charInf[7]];
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            $x = max($xArr) - min($xArr);
            $y = max($yArr) - min($yArr);
        } else {
            $x = $charInf[2] - $charInf[0];
            $y = $charInf[1] - $charInf[7];
        }
        // Set original lineHeight (used by line breaks):
        $theBBoxInfo['lineHeight'] = $y;
        // If any kind of spacing applys, we use this function:
        if ($spacing || $wordSpacing) {
            $x = 0;
            if (!$spacing && $wordSpacing) {
                $bits = explode(' ', $theText);
                foreach ($bits as $word) {
                    $word .= ' ';
                    $wordInf = $this->ImageTTFBBoxWrapper($conf['fontSize'], $conf['angle'], $conf['fontFile'], $word, $conf['splitRendering.'], $sF);
                    $wordW = $wordInf[2] - $wordInf[0];
                    $x += $wordW + $wordSpacing;
                }
            } else {
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                $utf8Chars = $this->csConvObj->utf8_to_numberarray($theText);
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                // For each UTF-8 char, do:
                foreach ($utf8Chars as $char) {
                    $charInf = $this->ImageTTFBBoxWrapper($conf['fontSize'], $conf['angle'], $conf['fontFile'], $char, $conf['splitRendering.'], $sF);
                    $charW = $charInf[2] - $charInf[0];
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                    $x += $charW + ($char === ' ' ? $wordSpacing : $spacing);
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                }
            }
        } elseif (isset($conf['breakWidth']) && $conf['breakWidth'] && $this->getRenderedTextWidth($conf['text'], $conf) > $conf['breakWidth']) {
            $maxWidth = 0;
            $currentWidth = 0;
            $breakWidth = $conf['breakWidth'];
            $breakSpace = $this->getBreakSpace($conf, $theBBoxInfo);
            $wordPairs = $this->getWordPairsForLineBreak($conf['text']);
            // Iterate through all word pairs:
            foreach ($wordPairs as $index => $wordPair) {
                $wordWidth = $this->getRenderedTextWidth($wordPair, $conf);
                if ($index == 0 || $currentWidth + $wordWidth <= $breakWidth) {
                    $currentWidth += $wordWidth;
                } else {
                    $maxWidth = max($maxWidth, $currentWidth);
                    $y += $breakSpace;
                    // Restart:
                    $currentWidth = $wordWidth;
                }
            }
            $x = max($maxWidth, $currentWidth) * $sF;
        }
        if ($sF > 1) {
            $x = ceil($x / $sF);
            $y = ceil($y / $sF);
            if (is_array($theBBoxInfo)) {
                foreach ($theBBoxInfo as &$value) {
                    $value = ceil($value / $sF);
                }
                unset($value);
            }
        }
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        return [$x, $y, $theBBoxInfo];
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    }

    /**
     * Adds an <area> tag to the internal variable $this->map which is used to accumulate the content for an ImageMap
     *
     * @param array $cords Coordinates for a polygon image map as created by ->calcTextCordsForMap()
     * @param array $conf Configuration for "imgMap." property of a TEXT GIFBUILDER object.
     * @access private
     * @see makeText(), calcTextCordsForMap()
     */
    public function addToMap($cords, $conf)
    {
        $this->map .= '<area' . ' shape="poly"' . ' coords="' . implode(',', $cords) . '"'
            . ' href="' . htmlspecialchars($conf['url']) . '"'
            . ($conf['target'] ? ' target="' . htmlspecialchars($conf['target']) . '"' : '')
            . ((string)$conf['titleText'] !== '' ? ' title="' . htmlspecialchars($conf['titleText']) . '"' : '')
            . ' alt="' . htmlspecialchars($conf['altText']) . '" />';
    }

    /**
     * Calculating the coordinates for a TEXT string on an image map. Used in an <area> tag
     *
     * @param array $cords Coordinates (from BBOX array)
     * @param array $offset Offset array
     * @param array $conf Configuration for "imgMap." property of a TEXT GIFBUILDER object.
     * @return array
     * @access private
     * @see makeText(), calcTextCordsForMap()
     */
    public function calcTextCordsForMap($cords, $offset, $conf)
    {
        $pars = GeneralUtility::intExplode(',', $conf['explode'] . ',');
        $newCords[0] = $cords[0] + $offset[0] - $pars[0];
        $newCords[1] = $cords[1] + $offset[1] + $pars[1];
        $newCords[2] = $cords[2] + $offset[0] + $pars[0];
        $newCords[3] = $cords[3] + $offset[1] + $pars[1];
        $newCords[4] = $cords[4] + $offset[0] + $pars[0];
        $newCords[5] = $cords[5] + $offset[1] - $pars[1];
        $newCords[6] = $cords[6] + $offset[0] - $pars[0];
        $newCords[7] = $cords[7] + $offset[1] - $pars[1];
        return $newCords;
    }

    /**
     * Printing text onto an image like the PHP function imageTTFText does but in addition it offers options for spacing of letters and words.
     * Spacing is done by printing one char at a time and this means that the spacing is rather uneven and probably not very nice.
     * See
     *
     * @param resource $im (See argument for PHP function imageTTFtext())
     * @param int $fontSize (See argument for PHP function imageTTFtext())
     * @param int $angle (See argument for PHP function imageTTFtext())
     * @param int $x (See argument for PHP function imageTTFtext())
     * @param int $y (See argument for PHP function imageTTFtext())
     * @param int $Fcolor (See argument for PHP function imageTTFtext())
     * @param string $fontFile (See argument for PHP function imageTTFtext())
     * @param string $text (See argument for PHP function imageTTFtext()). UTF-8 string, possibly with entities in.
     * @param int $spacing The spacing of letters in pixels
     * @param int $wordSpacing The spacing of words in pixels
     * @param array $splitRenderingConf Array
     * @param int $sF Scale factor
     * @access private
     */
    public function SpacedImageTTFText(&$im, $fontSize, $angle, $x, $y, $Fcolor, $fontFile, $text, $spacing, $wordSpacing, $splitRenderingConf, $sF = 1)
    {
        $spacing *= $sF;
        $wordSpacing *= $sF;
        if (!$spacing && $wordSpacing) {
            $bits = explode(' ', $text);
            foreach ($bits as $word) {
                $word .= ' ';
                $wordInf = $this->ImageTTFBBoxWrapper($fontSize, $angle, $fontFile, $word, $splitRenderingConf, $sF);
                $wordW = $wordInf[2] - $wordInf[0];
                $this->ImageTTFTextWrapper($im, $fontSize, $angle, $x, $y, $Fcolor, $fontFile, $word, $splitRenderingConf, $sF);
                $x += $wordW + $wordSpacing;
            }
        } else {
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            $utf8Chars = $this->csConvObj->utf8_to_numberarray($text);
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            // For each UTF-8 char, do:
            foreach ($utf8Chars as $char) {
                $charInf = $this->ImageTTFBBoxWrapper($fontSize, $angle, $fontFile, $char, $splitRenderingConf, $sF);
                $charW = $charInf[2] - $charInf[0];
                $this->ImageTTFTextWrapper($im, $fontSize, $angle, $x, $y, $Fcolor, $fontFile, $char, $splitRenderingConf, $sF);
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                $x += $charW + ($char === ' ' ? $wordSpacing : $spacing);
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            }
        }
    }

    /**
     * Function that finds the right fontsize that will render the textstring within a certain width
     *
     * @param array $conf The TypoScript properties of the TEXT GIFBUILDER object
     * @return int The new fontSize
     * @access private
     * @see \TYPO3\CMS\Frontend\Imaging\GifBuilder::start()
     */
    public function fontResize($conf)
    {
        // You have to use +calc options like [10.h] in 'offset' to get the right position of your text-image, if you use +calc in XY height!!!!
        $maxWidth = (int)$conf['maxWidth'];
        list($spacing, $wordSpacing) = $this->calcWordSpacing($conf);
        if ($maxWidth) {
            // If any kind of spacing applys, we use this function:
            if ($spacing || $wordSpacing) {
                return $conf['fontSize'];
            }
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            do {
                // Determine bounding box.
                $bounds = $this->ImageTTFBBoxWrapper($conf['fontSize'], $conf['angle'], $conf['fontFile'], $conf['text'], $conf['splitRendering.']);
                if ($conf['angle'] < 0) {
                    $pixelWidth = abs($bounds[4] - $bounds[0]);
                } elseif ($conf['angle'] > 0) {
                    $pixelWidth = abs($bounds[2] - $bounds[6]);
                } else {
                    $pixelWidth = abs($bounds[4] - $bounds[6]);
                }
                // Size is fine, exit:
                if ($pixelWidth <= $maxWidth) {
                    break;
                }
                $conf['fontSize']--;
            } while ($conf['fontSize'] > 1);
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        }
        return $conf['fontSize'];
    }

    /**
     * Wrapper for ImageTTFBBox
     *
     * @param int $fontSize (See argument for PHP function ImageTTFBBox())
     * @param int $angle (See argument for PHP function ImageTTFBBox())
     * @param string $fontFile (See argument for PHP function ImageTTFBBox())
     * @param string $string (See argument for PHP function ImageTTFBBox())
     * @param array $splitRendering Split-rendering configuration
     * @param int $sF Scale factor
     * @return array Information array.
     */
    public function ImageTTFBBoxWrapper($fontSize, $angle, $fontFile, $string, $splitRendering, $sF = 1)
    {
        // Initialize:
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        $offsetInfo = [];
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        $stringParts = $this->splitString($string, $splitRendering, $fontSize, $fontFile);
        // Traverse string parts:
        foreach ($stringParts as $strCfg) {
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            $fontFile = GeneralUtility::getFileAbsFileName($strCfg['fontFile']);
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            if (is_readable($fontFile)) {
                /**
                 * Calculate Bounding Box for part.
                 * Due to a PHP bug, we must retry if $calc[2] is negative.
                 *
                 * @see https://bugs.php.net/bug.php?id=51315
                 * @see https://bugs.php.net/bug.php?id=22513
                 */
                $try = 0;
                do {
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                    $calc = imagettfbbox($this->compensateFontSizeiBasedOnFreetypeDpi($sF * $strCfg['fontSize']), $angle, $fontFile, $strCfg['str']);
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                } while ($calc[2] < 0 && $try++ < 10);
                // Calculate offsets:
                if (empty($offsetInfo)) {
                    // First run, just copy over.
                    $offsetInfo = $calc;
                } else {
                    $offsetInfo[2] += $calc[2] - $calc[0] + (int)$splitRendering['compX'] + (int)$strCfg['xSpaceBefore'] + (int)$strCfg['xSpaceAfter'];
                    $offsetInfo[3] += $calc[3] - $calc[1] - (int)$splitRendering['compY'] - (int)$strCfg['ySpaceBefore'] - (int)$strCfg['ySpaceAfter'];
                    $offsetInfo[4] += $calc[4] - $calc[6] + (int)$splitRendering['compX'] + (int)$strCfg['xSpaceBefore'] + (int)$strCfg['xSpaceAfter'];
                    $offsetInfo[5] += $calc[5] - $calc[7] - (int)$splitRendering['compY'] - (int)$strCfg['ySpaceBefore'] - (int)$strCfg['ySpaceAfter'];
                }
            } else {
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                debug('cannot read file: ' . $fontFile, self::class . '::ImageTTFBBoxWrapper()');
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            }
        }
        return $offsetInfo;
    }

    /**
     * Wrapper for ImageTTFText
     *
     * @param resource $im (See argument for PHP function imageTTFtext())
     * @param int $fontSize (See argument for PHP function imageTTFtext())
     * @param int $angle (See argument for PHP function imageTTFtext())
     * @param int $x (See argument for PHP function imageTTFtext())
     * @param int $y (See argument for PHP function imageTTFtext())
     * @param int $color (See argument for PHP function imageTTFtext())
     * @param string $fontFile (See argument for PHP function imageTTFtext())
     * @param string $string (See argument for PHP function imageTTFtext()). UTF-8 string, possibly with entities in.
     * @param array $splitRendering Split-rendering configuration
     * @param int $sF Scale factor
     */
    public function ImageTTFTextWrapper($im, $fontSize, $angle, $x, $y, $color, $fontFile, $string, $splitRendering, $sF = 1)
    {
        // Initialize:
        $stringParts = $this->splitString($string, $splitRendering, $fontSize, $fontFile);
        $x = ceil($sF * $x);
        $y = ceil($sF * $y);
        // Traverse string parts:
        foreach ($stringParts as $i => $strCfg) {
            // Initialize:
            $colorIndex = $color;
            // Set custom color if any (only when niceText is off):
            if ($strCfg['color'] && $sF == 1) {
                $cols = $this->convertColor($strCfg['color']);
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                $colorIndex = imagecolorallocate($im, $cols[0], $cols[1], $cols[2]);
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                $colorIndex = $color >= 0 ? $colorIndex : -$colorIndex;
            }
            // Setting xSpaceBefore
            if ($i) {
                $x += (int)$strCfg['xSpaceBefore'];
                $y -= (int)$strCfg['ySpaceBefore'];