diff --git a/composer.json b/composer.json
index 199534f1..4c05ed40 100644
--- a/composer.json
+++ b/composer.json
@@ -27,6 +27,9 @@
             "php-cs-fixer fix --ansi --dry-run --diff",
             "phpcs --report-width=200 --report-summary  --report-full samples/ src/ tests/ --ignore=samples/Header.php --standard=PSR2 -n",
             "phpunit --color=always"
+        ],
+        "fix": [
+            "php-cs-fixer fix --ansi"
         ]
     },
     "require": {
diff --git a/docs/topics/migration-from-PHPExcel.md b/docs/topics/migration-from-PHPExcel.md
index 04374959..8a1eba77 100644
--- a/docs/topics/migration-from-PHPExcel.md
+++ b/docs/topics/migration-from-PHPExcel.md
@@ -124,13 +124,15 @@ autoloading mechanism.
 
 ## Writing PDF
 
-`PHPExcel_Settings::setPdfRenderer()` and `PHPExcel_Settings::setPdfRenderer()`
-were removed and PDF libraries must be installed via composer. So the only thing
-to do is to specify a renderer like so:
+`PHPExcel_Settings::getPdfRenderer()` and `PHPExcel_Settings::setPdfRenderer()`
+were removed. `PHPExcel_Settings::getPdfRendererName()` and
+`PHPExcel_Settings::setPdfRendererName()` were renamed as `setDefaultPdfWriter()`
+and `setDefaultPdfWriter()` respectively. And PDF libraries must be installed via
+composer. So the only thing to do is to specify a default writer class like so:
 
 ```php
-$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_MPDF;
-\PhpOffice\PhpSpreadsheet\Settings::setPdfRendererName($rendererName);
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF::class;
+\PhpOffice\PhpSpreadsheet\Settings::setDefaultPdfWriter($rendererName);
 ```
 
 ## PclZip and ZipArchive
diff --git a/docs/topics/reading-and-writing-to-file.md b/docs/topics/reading-and-writing-to-file.md
index 5bc05b74..b0ef11b1 100644
--- a/docs/topics/reading-and-writing-to-file.md
+++ b/docs/topics/reading-and-writing-to-file.md
@@ -745,11 +745,11 @@ of different libraries.
 
 Currently, the following libraries are supported:
 
-Library | Downloadable from                   | PhpSpreadsheet Internal Constant
---------|-------------------------------------|---------------------------------
-tcPDF   | https://github.com/tecnickcom/tcpdf | PDF_RENDERER_TCPDF
-mPDF    | https://github.com/mpdf/mpdf        | PDF_RENDERER_MPDF
-domPDF  | https://github.com/dompdf/dompdf    | PDF_RENDERER_DOMPDF
+Library | Downloadable from                   | PhpSpreadsheet writer
+--------|-------------------------------------|----------------------
+tcPDF   | https://github.com/tecnickcom/tcpdf | TcPdf
+mPDF    | https://github.com/mpdf/mpdf        | MPDF
+domPDF  | https://github.com/dompdf/dompdf    | DomPDF
 
 The different libraries have different strengths and weaknesses. Some
 generate better formatted output than others, some are faster or use
@@ -757,12 +757,19 @@ less memory than others, while some generate smaller .pdf files. It is
 the developers choice which one they wish to use, appropriate to their
 own circumstances.
 
-Before instantiating a Writer to generate PDF output, you will need to
-indicate which Rendering library you are using.
+Before instantiating a Writer via `IOFactory` to generate PDF output,
+you will need to indicate which writer you are using:
 
 ``` php
-$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_MPDF;
-\PhpOffice\PhpSpreadsheet\Settings::setPdfRendererName($rendererName);
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF::class;
+\PhpOffice\PhpSpreadsheet\Settings::setDefaultPdfWriter($rendererName);
+$writer = \PhpOffice\PhpSpreadsheet\IOFactory\IOFactory::createWriter($spreadsheet, 'Pdf');
+```
+
+Or you can instantiate directly the writer of your choice like so:
+
+``` php
+$writer = \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF($spreadsheet);
 ```
 
 #### Writing a spreadsheet
@@ -771,11 +778,11 @@ Once you have identified the Renderer that you wish to use for PDF
 generation, you can write a .pdf file using the following code:
 
 ``` php
-$writer = new \PhpOffice\PhpSpreadsheet\Writer\Pdf($spreadsheet);
+$writer = new \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF($spreadsheet);
 $writer->save("05featuredemo.pdf");
 ```
 
-Please note that \PhpOffice\PhpSpreadsheet\Writer\Pdf only outputs the
+Please note that `\PhpOffice\PhpSpreadsheet\Writer\Pdf` only outputs the
 first worksheet by default.
 
 #### Write all worksheets
@@ -803,7 +810,7 @@ This can be slow on large spreadsheets, and maybe even unwanted. You can
 however disable formula pre-calculation:
 
 ``` php
-$writer = new \PhpOffice\PhpSpreadsheet\Writer\Pdf($spreadsheet);
+$writer = new \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF($spreadsheet);
 $writer->setPreCalculateFormulas(false);
 
 $writer->save("05featuredemo.pdf");
diff --git a/samples/Basic/01_Simple_download_pdf.php b/samples/Basic/01_Simple_download_pdf.php
index 7f013194..7b53c4f2 100644
--- a/samples/Basic/01_Simple_download_pdf.php
+++ b/samples/Basic/01_Simple_download_pdf.php
@@ -16,9 +16,7 @@ if ($helper->isCli()) {
 
 //	Change these values to select the Rendering library that you wish to use
 //		and its directory location on your server
-//$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_TCPDF;
-$rendererName = Settings::PDF_RENDERER_MPDF;
-//$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_DOMPDF;
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF::class;
 
 // Create new Spreadsheet object
 $spreadsheet = new Spreadsheet();
@@ -51,7 +49,7 @@ $spreadsheet->getActiveSheet()->setShowGridLines(false);
 // Set active sheet index to the first sheet, so Excel opens this as the first sheet
 $spreadsheet->setActiveSheetIndex(0);
 
-Settings::setPdfRendererName($rendererName);
+Settings::setDefaultPdfWriter($rendererName);
 
 // Redirect output to a client’s web browser (PDF)
 header('Content-Type: application/pdf');
diff --git a/samples/Basic/26_Utf8.php b/samples/Basic/26_Utf8.php
index 89be2c94..45a9ad60 100644
--- a/samples/Basic/26_Utf8.php
+++ b/samples/Basic/26_Utf8.php
@@ -7,9 +7,7 @@ require __DIR__ . '/../Header.php';
 
 //	Change these values to select the PDF Rendering library that you wish to use
 //		and its directory location on your server
-//$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_TCPDF;
-//$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_MPDF;
-$rendererName = Settings::PDF_RENDERER_DOMPDF;
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\DomPDF::class;
 
 // Read from Xlsx (.xlsx) template
 $helper->log('Load Xlsx template file');
@@ -21,7 +19,7 @@ $helper->write($spreadsheet, __FILE__, ['Xlsx', 'Xls', 'Html']);
 
 // Export to PDF (.pdf)
 $helper->log('Write to PDF format');
-Settings::setPdfRendererName($rendererName);
+Settings::setDefaultPdfWriter($rendererName);
 $helper->write($spreadsheet, __FILE__, ['Pdf']);
 
 // Remove first two rows with field headers before exporting to CSV
diff --git a/samples/Chart/32_Chart_read_write_PDF.php b/samples/Chart/32_Chart_read_write_PDF.php
index c18ab872..987020ac 100644
--- a/samples/Chart/32_Chart_read_write_PDF.php
+++ b/samples/Chart/32_Chart_read_write_PDF.php
@@ -7,11 +7,9 @@ require __DIR__ . '/../Header.php';
 
 //	Change these values to select the Rendering library that you wish to use
 //		for PDF files, and its directory location on your server
-//$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_TCPDF;
-$rendererName = Settings::PDF_RENDERER_MPDF;
-//$rendererName = \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_DOMPDF;
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF::class;
 
-Settings::setPdfRendererName($rendererName);
+Settings::setDefaultPdfWriter($rendererName);
 
 //	Change these values to select the Rendering library that you wish to use
 //		for Chart images, and its directory location on your server
diff --git a/samples/Pdf/21_Pdf_Domdf.php b/samples/Pdf/21_Pdf_Domdf.php
index 6750da2f..4c6c7f07 100644
--- a/samples/Pdf/21_Pdf_Domdf.php
+++ b/samples/Pdf/21_Pdf_Domdf.php
@@ -12,9 +12,9 @@ $spreadsheet->getActiveSheet()->setShowGridLines(false);
 $helper->log('Set orientation to landscape');
 $spreadsheet->getActiveSheet()->getPageSetup()->setOrientation(PageSetup::ORIENTATION_LANDSCAPE);
 
-$rendererName = Settings::PDF_RENDERER_DOMPDF;
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\DomPDF::class;
 $helper->log("Write to PDF format using {$rendererName}");
-Settings::setPdfRendererName($rendererName);
+Settings::setDefaultPdfWriter($rendererName);
 
 // Save
 $helper->write($spreadsheet, __FILE__, ['Pdf']);
diff --git a/samples/Pdf/21_Pdf_TCPDF.php b/samples/Pdf/21_Pdf_TCPDF.php
index 683ba547..11c1d4fb 100644
--- a/samples/Pdf/21_Pdf_TCPDF.php
+++ b/samples/Pdf/21_Pdf_TCPDF.php
@@ -12,9 +12,9 @@ $spreadsheet->getActiveSheet()->setShowGridLines(false);
 $helper->log('Set orientation to landscape');
 $spreadsheet->getActiveSheet()->getPageSetup()->setOrientation(PageSetup::ORIENTATION_LANDSCAPE);
 
-$rendererName = Settings::PDF_RENDERER_TCPDF;
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\TcPDF::class;
 $helper->log("Write to PDF format using {$rendererName}");
-Settings::setPdfRendererName($rendererName);
+Settings::setDefaultPdfWriter($rendererName);
 
 // Save
 $helper->write($spreadsheet, __FILE__, ['Pdf']);
diff --git a/samples/Pdf/21_Pdf_mPDF.php b/samples/Pdf/21_Pdf_mPDF.php
index 1d455c5b..faad16fe 100644
--- a/samples/Pdf/21_Pdf_mPDF.php
+++ b/samples/Pdf/21_Pdf_mPDF.php
@@ -12,9 +12,9 @@ $spreadsheet->getActiveSheet()->setShowGridLines(false);
 $helper->log('Set orientation to landscape');
 $spreadsheet->getActiveSheet()->getPageSetup()->setOrientation(PageSetup::ORIENTATION_LANDSCAPE);
 
-$rendererName = Settings::PDF_RENDERER_MPDF;
+$rendererName = \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF::class;
 $helper->log("Write to PDF format using {$rendererName}");
-Settings::setPdfRendererName($rendererName);
+Settings::setDefaultPdfWriter($rendererName);
 
 // Save
 $helper->write($spreadsheet, __FILE__, ['Pdf']);
diff --git a/src/PhpSpreadsheet/Helper/Migrator.php b/src/PhpSpreadsheet/Helper/Migrator.php
index 51252d0b..7162d8d9 100644
--- a/src/PhpSpreadsheet/Helper/Migrator.php
+++ b/src/PhpSpreadsheet/Helper/Migrator.php
@@ -59,7 +59,7 @@ class Migrator
             'PHPExcel_Writer_OpenDocument_Styles' => \PhpOffice\PhpSpreadsheet\Writer\Ods\Styles::class,
             'PHPExcel_Writer_OpenDocument_Thumbnails' => \PhpOffice\PhpSpreadsheet\Writer\Ods\Thumbnails::class,
             'PHPExcel_Writer_OpenDocument_WriterPart' => \PhpOffice\PhpSpreadsheet\Writer\Ods\WriterPart::class,
-            'PHPExcel_Writer_PDF_Core' => \PhpOffice\PhpSpreadsheet\Writer\Pdf\Core::class,
+            'PHPExcel_Writer_PDF_Core' => \PhpOffice\PhpSpreadsheet\Writer\Pdf::class,
             'PHPExcel_Writer_PDF_DomPDF' => \PhpOffice\PhpSpreadsheet\Writer\Pdf\DomPDF::class,
             'PHPExcel_Writer_PDF_mPDF' => \PhpOffice\PhpSpreadsheet\Writer\Pdf\MPDF::class,
             'PHPExcel_Writer_PDF_tcPDF' => \PhpOffice\PhpSpreadsheet\Writer\Pdf\TcPDF::class,
diff --git a/src/PhpSpreadsheet/IOFactory.php b/src/PhpSpreadsheet/IOFactory.php
index 9b3a0f2d..941e1892 100644
--- a/src/PhpSpreadsheet/IOFactory.php
+++ b/src/PhpSpreadsheet/IOFactory.php
@@ -98,6 +98,15 @@ class IOFactory
         // Search type
         $searchType = 'IWriter';
 
+        if ($writerType === 'Pdf') {
+            $pdfWriter = Settings::getDefaultPdfWriter();
+            if ($pdfWriter === null) {
+                throw new Exception('PDF default writer has not been defined.');
+            }
+
+            return new $pdfWriter($spreadsheet);
+        }
+
         // Include class
         foreach (self::$searchLocations as $searchLocation) {
             if ($searchLocation['type'] == $searchType) {
diff --git a/src/PhpSpreadsheet/Settings.php b/src/PhpSpreadsheet/Settings.php
index b17b886a..1f71cda6 100644
--- a/src/PhpSpreadsheet/Settings.php
+++ b/src/PhpSpreadsheet/Settings.php
@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet;
 
 use PhpOffice\PhpSpreadsheet\Collection\Memory;
+use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 use Psr\SimpleCache\CacheInterface;
 
 class Settings
@@ -10,19 +11,9 @@ class Settings
     /**    Optional Chart Rendering libraries */
     const CHART_RENDERER_JPGRAPH = 'JpGraph';
 
-    /**    Optional PDF Rendering libraries */
-    const PDF_RENDERER_TCPDF = 'TcPDF';
-    const PDF_RENDERER_DOMPDF = 'DomPDF';
-    const PDF_RENDERER_MPDF = 'MPDF';
-
     private static $chartRenderers = [
         self::CHART_RENDERER_JPGRAPH,
     ];
-    private static $pdfRenderers = [
-        self::PDF_RENDERER_TCPDF,
-        self::PDF_RENDERER_DOMPDF,
-        self::PDF_RENDERER_MPDF,
-    ];
 
     /**
      * Name of the external Library used for rendering charts
@@ -47,7 +38,7 @@ class Settings
      *
      * @var string
      */
-    private static $pdfRendererName;
+    private static $defaultPdfWriter;
 
     /**
      * Default options for libxml loader.
@@ -152,33 +143,27 @@ class Settings
     }
 
     /**
-     * Identify to PhpSpreadsheet the external library to use for rendering PDF files.
+     * Identify to PhpSpreadsheet the default writer to use for PDF.
      *
-     * @param string $libraryName Internal reference name of the library
-     *     e.g. \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_TCPDF,
-     *          \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_DOMPDF
-     *       or \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_MPDF
+     * @param string $writerClassName Internal reference name of the library
      */
-    public static function setPdfRendererName($libraryName)
+    public static function setDefaultPdfWriter($writerClassName)
     {
-        if (!in_array($libraryName, self::$pdfRenderers)) {
-            throw new Exception('"' . $libraryName . '" is not a valid PDF library name');
+        if (!is_a($writerClassName, Pdf::class, true)) {
+            throw new Exception('"' . $writerClassName . '" is not a valid PDF writer class name');
         }
-        self::$pdfRendererName = $libraryName;
+        self::$defaultPdfWriter = $writerClassName;
     }
 
     /**
-     * Return the PDF Rendering Library that PhpSpreadsheet is currently configured to use (e.g. dompdf).
+     * Return the default PDF writer that PhpSpreadsheet is currently configured to use (e.g. dompdf).
      *
      * @return null|string Internal reference name of the PDF Rendering Library that PhpSpreadsheet is
      *     currently configured to use
-     * e.g. \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_TCPDF,
-     *       \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_DOMPDF
-     *    or \PhpOffice\PhpSpreadsheet\Settings::PDF_RENDERER_MPDF
      */
-    public static function getPdfRendererName()
+    public static function getDefaultPdfWriter()
     {
-        return self::$pdfRendererName;
+        return self::$defaultPdfWriter;
     }
 
     /**
diff --git a/src/PhpSpreadsheet/Writer/Pdf.php b/src/PhpSpreadsheet/Writer/Pdf.php
index 55e71953..93a03acd 100644
--- a/src/PhpSpreadsheet/Writer/Pdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf.php
@@ -2,58 +2,280 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer;
 
-use PhpOffice\PhpSpreadsheet\Settings;
+use PhpOffice\PhpSpreadsheet\Calculation;
+use PhpOffice\PhpSpreadsheet\Shared\File;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
+use PhpOffice\PhpSpreadsheet\Writer\Exception as WriterException;
 
-class Pdf implements IWriter
+abstract class Pdf extends Html implements IWriter
 {
     /**
-     * The wrapper for the requested PDF rendering engine.
+     * Temporary storage directory.
      *
-     * @var PDF\Core
+     * @var string
      */
-    private $renderer;
+    protected $tempDir = '';
 
     /**
-     * Instantiate a new renderer of the configured type within this container class.
+     * Font.
      *
-     * @param Spreadsheet $spreadsheet PhpSpreadsheet object
+     * @var string
+     */
+    protected $font = 'freesans';
+
+    /**
+     * Orientation (Over-ride).
      *
-     * @throws Exception when PDF library is not configured
+     * @var string
+     */
+    protected $orientation;
+
+    /**
+     * Paper size (Over-ride).
+     *
+     * @var int
+     */
+    protected $paperSize;
+
+    /**
+     * Temporary storage for Save Array Return type.
+     *
+     * @var string
+     */
+    private $saveArrayReturnType;
+
+    /**
+     * Paper Sizes xRef List.
+     *
+     * @var array
+     */
+    protected static $paperSizes = [
+        PageSetup::PAPERSIZE_LETTER => 'LETTER', //    (8.5 in. by 11 in.)
+        PageSetup::PAPERSIZE_LETTER_SMALL => 'LETTER', //    (8.5 in. by 11 in.)
+        PageSetup::PAPERSIZE_TABLOID => [792.00, 1224.00], //    (11 in. by 17 in.)
+        PageSetup::PAPERSIZE_LEDGER => [1224.00, 792.00], //    (17 in. by 11 in.)
+        PageSetup::PAPERSIZE_LEGAL => 'LEGAL', //    (8.5 in. by 14 in.)
+        PageSetup::PAPERSIZE_STATEMENT => [396.00, 612.00], //    (5.5 in. by 8.5 in.)
+        PageSetup::PAPERSIZE_EXECUTIVE => 'EXECUTIVE', //    (7.25 in. by 10.5 in.)
+        PageSetup::PAPERSIZE_A3 => 'A3', //    (297 mm by 420 mm)
+        PageSetup::PAPERSIZE_A4 => 'A4', //    (210 mm by 297 mm)
+        PageSetup::PAPERSIZE_A4_SMALL => 'A4', //    (210 mm by 297 mm)
+        PageSetup::PAPERSIZE_A5 => 'A5', //    (148 mm by 210 mm)
+        PageSetup::PAPERSIZE_B4 => 'B4', //    (250 mm by 353 mm)
+        PageSetup::PAPERSIZE_B5 => 'B5', //    (176 mm by 250 mm)
+        PageSetup::PAPERSIZE_FOLIO => 'FOLIO', //    (8.5 in. by 13 in.)
+        PageSetup::PAPERSIZE_QUARTO => [609.45, 779.53], //    (215 mm by 275 mm)
+        PageSetup::PAPERSIZE_STANDARD_1 => [720.00, 1008.00], //    (10 in. by 14 in.)
+        PageSetup::PAPERSIZE_STANDARD_2 => [792.00, 1224.00], //    (11 in. by 17 in.)
+        PageSetup::PAPERSIZE_NOTE => 'LETTER', //    (8.5 in. by 11 in.)
+        PageSetup::PAPERSIZE_NO9_ENVELOPE => [279.00, 639.00], //    (3.875 in. by 8.875 in.)
+        PageSetup::PAPERSIZE_NO10_ENVELOPE => [297.00, 684.00], //    (4.125 in. by 9.5 in.)
+        PageSetup::PAPERSIZE_NO11_ENVELOPE => [324.00, 747.00], //    (4.5 in. by 10.375 in.)
+        PageSetup::PAPERSIZE_NO12_ENVELOPE => [342.00, 792.00], //    (4.75 in. by 11 in.)
+        PageSetup::PAPERSIZE_NO14_ENVELOPE => [360.00, 828.00], //    (5 in. by 11.5 in.)
+        PageSetup::PAPERSIZE_C => [1224.00, 1584.00], //    (17 in. by 22 in.)
+        PageSetup::PAPERSIZE_D => [1584.00, 2448.00], //    (22 in. by 34 in.)
+        PageSetup::PAPERSIZE_E => [2448.00, 3168.00], //    (34 in. by 44 in.)
+        PageSetup::PAPERSIZE_DL_ENVELOPE => [311.81, 623.62], //    (110 mm by 220 mm)
+        PageSetup::PAPERSIZE_C5_ENVELOPE => 'C5', //    (162 mm by 229 mm)
+        PageSetup::PAPERSIZE_C3_ENVELOPE => 'C3', //    (324 mm by 458 mm)
+        PageSetup::PAPERSIZE_C4_ENVELOPE => 'C4', //    (229 mm by 324 mm)
+        PageSetup::PAPERSIZE_C6_ENVELOPE => 'C6', //    (114 mm by 162 mm)
+        PageSetup::PAPERSIZE_C65_ENVELOPE => [323.15, 649.13], //    (114 mm by 229 mm)
+        PageSetup::PAPERSIZE_B4_ENVELOPE => 'B4', //    (250 mm by 353 mm)
+        PageSetup::PAPERSIZE_B5_ENVELOPE => 'B5', //    (176 mm by 250 mm)
+        PageSetup::PAPERSIZE_B6_ENVELOPE => [498.90, 354.33], //    (176 mm by 125 mm)
+        PageSetup::PAPERSIZE_ITALY_ENVELOPE => [311.81, 651.97], //    (110 mm by 230 mm)
+        PageSetup::PAPERSIZE_MONARCH_ENVELOPE => [279.00, 540.00], //    (3.875 in. by 7.5 in.)
+        PageSetup::PAPERSIZE_6_3_4_ENVELOPE => [261.00, 468.00], //    (3.625 in. by 6.5 in.)
+        PageSetup::PAPERSIZE_US_STANDARD_FANFOLD => [1071.00, 792.00], //    (14.875 in. by 11 in.)
+        PageSetup::PAPERSIZE_GERMAN_STANDARD_FANFOLD => [612.00, 864.00], //    (8.5 in. by 12 in.)
+        PageSetup::PAPERSIZE_GERMAN_LEGAL_FANFOLD => 'FOLIO', //    (8.5 in. by 13 in.)
+        PageSetup::PAPERSIZE_ISO_B4 => 'B4', //    (250 mm by 353 mm)
+        PageSetup::PAPERSIZE_JAPANESE_DOUBLE_POSTCARD => [566.93, 419.53], //    (200 mm by 148 mm)
+        PageSetup::PAPERSIZE_STANDARD_PAPER_1 => [648.00, 792.00], //    (9 in. by 11 in.)
+        PageSetup::PAPERSIZE_STANDARD_PAPER_2 => [720.00, 792.00], //    (10 in. by 11 in.)
+        PageSetup::PAPERSIZE_STANDARD_PAPER_3 => [1080.00, 792.00], //    (15 in. by 11 in.)
+        PageSetup::PAPERSIZE_INVITE_ENVELOPE => [623.62, 623.62], //    (220 mm by 220 mm)
+        PageSetup::PAPERSIZE_LETTER_EXTRA_PAPER => [667.80, 864.00], //    (9.275 in. by 12 in.)
+        PageSetup::PAPERSIZE_LEGAL_EXTRA_PAPER => [667.80, 1080.00], //    (9.275 in. by 15 in.)
+        PageSetup::PAPERSIZE_TABLOID_EXTRA_PAPER => [841.68, 1296.00], //    (11.69 in. by 18 in.)
+        PageSetup::PAPERSIZE_A4_EXTRA_PAPER => [668.98, 912.76], //    (236 mm by 322 mm)
+        PageSetup::PAPERSIZE_LETTER_TRANSVERSE_PAPER => [595.80, 792.00], //    (8.275 in. by 11 in.)
+        PageSetup::PAPERSIZE_A4_TRANSVERSE_PAPER => 'A4', //    (210 mm by 297 mm)
+        PageSetup::PAPERSIZE_LETTER_EXTRA_TRANSVERSE_PAPER => [667.80, 864.00], //    (9.275 in. by 12 in.)
+        PageSetup::PAPERSIZE_SUPERA_SUPERA_A4_PAPER => [643.46, 1009.13], //    (227 mm by 356 mm)
+        PageSetup::PAPERSIZE_SUPERB_SUPERB_A3_PAPER => [864.57, 1380.47], //    (305 mm by 487 mm)
+        PageSetup::PAPERSIZE_LETTER_PLUS_PAPER => [612.00, 913.68], //    (8.5 in. by 12.69 in.)
+        PageSetup::PAPERSIZE_A4_PLUS_PAPER => [595.28, 935.43], //    (210 mm by 330 mm)
+        PageSetup::PAPERSIZE_A5_TRANSVERSE_PAPER => 'A5', //    (148 mm by 210 mm)
+        PageSetup::PAPERSIZE_JIS_B5_TRANSVERSE_PAPER => [515.91, 728.50], //    (182 mm by 257 mm)
+        PageSetup::PAPERSIZE_A3_EXTRA_PAPER => [912.76, 1261.42], //    (322 mm by 445 mm)
+        PageSetup::PAPERSIZE_A5_EXTRA_PAPER => [493.23, 666.14], //    (174 mm by 235 mm)
+        PageSetup::PAPERSIZE_ISO_B5_EXTRA_PAPER => [569.76, 782.36], //    (201 mm by 276 mm)
+        PageSetup::PAPERSIZE_A2_PAPER => 'A2', //    (420 mm by 594 mm)
+        PageSetup::PAPERSIZE_A3_TRANSVERSE_PAPER => 'A3', //    (297 mm by 420 mm)
+        PageSetup::PAPERSIZE_A3_EXTRA_TRANSVERSE_PAPER => [912.76, 1261.42], //    (322 mm by 445 mm)
+    ];
+
+    /**
+     * Create a new PDF Writer instance.
+     *
+     * @param Spreadsheet $spreadsheet Spreadsheet object
      */
     public function __construct(Spreadsheet $spreadsheet)
     {
-        $pdfLibraryName = Settings::getPdfRendererName();
-        if ($pdfLibraryName === null) {
-            throw new Exception('PDF Rendering library has not been defined.');
-        }
-
-        $rendererName = '\\PhpOffice\\PhpSpreadsheet\\Writer\\Pdf\\' . $pdfLibraryName;
-        $this->renderer = new $rendererName($spreadsheet);
+        parent::__construct($spreadsheet);
+        $this->setUseInlineCss(true);
+        $this->tempDir = File::sysGetTempDir();
     }
 
     /**
-     * Magic method to handle direct calls to the configured PDF renderer wrapper class.
+     * Get Font.
      *
-     * @param string $name Renderer library method name
-     * @param mixed[] $arguments Array of arguments to pass to the renderer method
-     *
-     * @return mixed Returned data from the PDF renderer wrapper method
+     * @return string
      */
-    public function __call($name, $arguments)
+    public function getFont()
     {
-        if ($this->renderer === null) {
-            throw new Exception('PDF Rendering library has not been defined.');
-        }
-
-        return call_user_func_array([$this->renderer, $name], $arguments);
+        return $this->font;
     }
 
     /**
-     * {@inheritdoc}
+     * Set font. Examples:
+     *      'arialunicid0-chinese-simplified'
+     *      'arialunicid0-chinese-traditional'
+     *      'arialunicid0-korean'
+     *      'arialunicid0-japanese'.
+     *
+     * @param string $fontName
      */
-    public function save($pFilename)
+    public function setFont($fontName)
     {
-        $this->renderer->save($pFilename);
+        $this->font = $fontName;
+
+        return $this;
+    }
+
+    /**
+     * Get Paper Size.
+     *
+     * @return int
+     */
+    public function getPaperSize()
+    {
+        return $this->paperSize;
+    }
+
+    /**
+     * Set Paper Size.
+     *
+     * @param string $pValue Paper size see PageSetup::PAPERSIZE_*
+     *
+     * @return self
+     */
+    public function setPaperSize($pValue)
+    {
+        $this->paperSize = $pValue;
+
+        return $this;
+    }
+
+    /**
+     * Get Orientation.
+     *
+     * @return string
+     */
+    public function getOrientation()
+    {
+        return $this->orientation;
+    }
+
+    /**
+     * Set Orientation.
+     *
+     * @param string $pValue Page orientation see PageSetup::ORIENTATION_*
+     *
+     * @return self
+     */
+    public function setOrientation($pValue)
+    {
+        $this->orientation = $pValue;
+
+        return $this;
+    }
+
+    /**
+     * Get temporary storage directory.
+     *
+     * @return string
+     */
+    public function getTempDir()
+    {
+        return $this->tempDir;
+    }
+
+    /**
+     * Set temporary storage directory.
+     *
+     * @param string $pValue Temporary storage directory
+     *
+     * @throws WriterException when directory does not exist
+     *
+     * @return self
+     */
+    public function setTempDir($pValue)
+    {
+        if (is_dir($pValue)) {
+            $this->tempDir = $pValue;
+        } else {
+            throw new WriterException("Directory does not exist: $pValue");
+        }
+
+        return $this;
+    }
+
+    /**
+     * Save Spreadsheet to PDF file, pre-save.
+     *
+     * @param string $pFilename Name of the file to save as
+     *
+     * @throws WriterException
+     */
+    protected function prepareForSave($pFilename)
+    {
+        //  garbage collect
+        $this->spreadsheet->garbageCollect();
+
+        $this->saveArrayReturnType = Calculation::getArrayReturnType();
+        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_VALUE);
+
+        //  Open file
+        $fileHandle = fopen($pFilename, 'w');
+        if ($fileHandle === false) {
+            throw new WriterException("Could not open file $pFilename for writing.");
+        }
+
+        //  Set PDF
+        $this->isPdf = true;
+        //  Build CSS
+        $this->buildCSS(true);
+
+        return $fileHandle;
+    }
+
+    /**
+     * Save PhpSpreadsheet to PDF file, post-save.
+     *
+     * @param resource $fileHandle
+     *
+     * @throws WriterException
+     */
+    protected function restoreStateAfterSave($fileHandle)
+    {
+        //  Close file
+        fclose($fileHandle);
+
+        Calculation::setArrayReturnType($this->saveArrayReturnType);
     }
 }
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Core.php b/src/PhpSpreadsheet/Writer/Pdf/Core.php
deleted file mode 100644
index 0f0a74c9..00000000
--- a/src/PhpSpreadsheet/Writer/Pdf/Core.php
+++ /dev/null
@@ -1,282 +0,0 @@
-<?php
-
-namespace PhpOffice\PhpSpreadsheet\Writer\Pdf;
-
-use PhpOffice\PhpSpreadsheet\Calculation;
-use PhpOffice\PhpSpreadsheet\Shared\File;
-use PhpOffice\PhpSpreadsheet\Spreadsheet;
-use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
-use PhpOffice\PhpSpreadsheet\Writer\Exception as WriterException;
-use PhpOffice\PhpSpreadsheet\Writer\Html;
-
-abstract class Core extends Html
-{
-    /**
-     * Temporary storage directory.
-     *
-     * @var string
-     */
-    protected $tempDir = '';
-
-    /**
-     * Font.
-     *
-     * @var string
-     */
-    protected $font = 'freesans';
-
-    /**
-     * Orientation (Over-ride).
-     *
-     * @var string
-     */
-    protected $orientation;
-
-    /**
-     * Paper size (Over-ride).
-     *
-     * @var int
-     */
-    protected $paperSize;
-
-    /**
-     * Temporary storage for Save Array Return type.
-     *
-     * @var string
-     */
-    private $saveArrayReturnType;
-
-    /**
-     * Paper Sizes xRef List.
-     *
-     * @var array
-     */
-    protected static $paperSizes = [
-        PageSetup::PAPERSIZE_LETTER => 'LETTER', //    (8.5 in. by 11 in.)
-        PageSetup::PAPERSIZE_LETTER_SMALL => 'LETTER', //    (8.5 in. by 11 in.)
-        PageSetup::PAPERSIZE_TABLOID => [792.00, 1224.00], //    (11 in. by 17 in.)
-        PageSetup::PAPERSIZE_LEDGER => [1224.00, 792.00], //    (17 in. by 11 in.)
-        PageSetup::PAPERSIZE_LEGAL => 'LEGAL', //    (8.5 in. by 14 in.)
-        PageSetup::PAPERSIZE_STATEMENT => [396.00, 612.00], //    (5.5 in. by 8.5 in.)
-        PageSetup::PAPERSIZE_EXECUTIVE => 'EXECUTIVE', //    (7.25 in. by 10.5 in.)
-        PageSetup::PAPERSIZE_A3 => 'A3', //    (297 mm by 420 mm)
-        PageSetup::PAPERSIZE_A4 => 'A4', //    (210 mm by 297 mm)
-        PageSetup::PAPERSIZE_A4_SMALL => 'A4', //    (210 mm by 297 mm)
-        PageSetup::PAPERSIZE_A5 => 'A5', //    (148 mm by 210 mm)
-        PageSetup::PAPERSIZE_B4 => 'B4', //    (250 mm by 353 mm)
-        PageSetup::PAPERSIZE_B5 => 'B5', //    (176 mm by 250 mm)
-        PageSetup::PAPERSIZE_FOLIO => 'FOLIO', //    (8.5 in. by 13 in.)
-        PageSetup::PAPERSIZE_QUARTO => [609.45, 779.53], //    (215 mm by 275 mm)
-        PageSetup::PAPERSIZE_STANDARD_1 => [720.00, 1008.00], //    (10 in. by 14 in.)
-        PageSetup::PAPERSIZE_STANDARD_2 => [792.00, 1224.00], //    (11 in. by 17 in.)
-        PageSetup::PAPERSIZE_NOTE => 'LETTER', //    (8.5 in. by 11 in.)
-        PageSetup::PAPERSIZE_NO9_ENVELOPE => [279.00, 639.00], //    (3.875 in. by 8.875 in.)
-        PageSetup::PAPERSIZE_NO10_ENVELOPE => [297.00, 684.00], //    (4.125 in. by 9.5 in.)
-        PageSetup::PAPERSIZE_NO11_ENVELOPE => [324.00, 747.00], //    (4.5 in. by 10.375 in.)
-        PageSetup::PAPERSIZE_NO12_ENVELOPE => [342.00, 792.00], //    (4.75 in. by 11 in.)
-        PageSetup::PAPERSIZE_NO14_ENVELOPE => [360.00, 828.00], //    (5 in. by 11.5 in.)
-        PageSetup::PAPERSIZE_C => [1224.00, 1584.00], //    (17 in. by 22 in.)
-        PageSetup::PAPERSIZE_D => [1584.00, 2448.00], //    (22 in. by 34 in.)
-        PageSetup::PAPERSIZE_E => [2448.00, 3168.00], //    (34 in. by 44 in.)
-        PageSetup::PAPERSIZE_DL_ENVELOPE => [311.81, 623.62], //    (110 mm by 220 mm)
-        PageSetup::PAPERSIZE_C5_ENVELOPE => 'C5', //    (162 mm by 229 mm)
-        PageSetup::PAPERSIZE_C3_ENVELOPE => 'C3', //    (324 mm by 458 mm)
-        PageSetup::PAPERSIZE_C4_ENVELOPE => 'C4', //    (229 mm by 324 mm)
-        PageSetup::PAPERSIZE_C6_ENVELOPE => 'C6', //    (114 mm by 162 mm)
-        PageSetup::PAPERSIZE_C65_ENVELOPE => [323.15, 649.13], //    (114 mm by 229 mm)
-        PageSetup::PAPERSIZE_B4_ENVELOPE => 'B4', //    (250 mm by 353 mm)
-        PageSetup::PAPERSIZE_B5_ENVELOPE => 'B5', //    (176 mm by 250 mm)
-        PageSetup::PAPERSIZE_B6_ENVELOPE => [498.90, 354.33], //    (176 mm by 125 mm)
-        PageSetup::PAPERSIZE_ITALY_ENVELOPE => [311.81, 651.97], //    (110 mm by 230 mm)
-        PageSetup::PAPERSIZE_MONARCH_ENVELOPE => [279.00, 540.00], //    (3.875 in. by 7.5 in.)
-        PageSetup::PAPERSIZE_6_3_4_ENVELOPE => [261.00, 468.00], //    (3.625 in. by 6.5 in.)
-        PageSetup::PAPERSIZE_US_STANDARD_FANFOLD => [1071.00, 792.00], //    (14.875 in. by 11 in.)
-        PageSetup::PAPERSIZE_GERMAN_STANDARD_FANFOLD => [612.00, 864.00], //    (8.5 in. by 12 in.)
-        PageSetup::PAPERSIZE_GERMAN_LEGAL_FANFOLD => 'FOLIO', //    (8.5 in. by 13 in.)
-        PageSetup::PAPERSIZE_ISO_B4 => 'B4', //    (250 mm by 353 mm)
-        PageSetup::PAPERSIZE_JAPANESE_DOUBLE_POSTCARD => [566.93, 419.53], //    (200 mm by 148 mm)
-        PageSetup::PAPERSIZE_STANDARD_PAPER_1 => [648.00, 792.00], //    (9 in. by 11 in.)
-        PageSetup::PAPERSIZE_STANDARD_PAPER_2 => [720.00, 792.00], //    (10 in. by 11 in.)
-        PageSetup::PAPERSIZE_STANDARD_PAPER_3 => [1080.00, 792.00], //    (15 in. by 11 in.)
-        PageSetup::PAPERSIZE_INVITE_ENVELOPE => [623.62, 623.62], //    (220 mm by 220 mm)
-        PageSetup::PAPERSIZE_LETTER_EXTRA_PAPER => [667.80, 864.00], //    (9.275 in. by 12 in.)
-        PageSetup::PAPERSIZE_LEGAL_EXTRA_PAPER => [667.80, 1080.00], //    (9.275 in. by 15 in.)
-        PageSetup::PAPERSIZE_TABLOID_EXTRA_PAPER => [841.68, 1296.00], //    (11.69 in. by 18 in.)
-        PageSetup::PAPERSIZE_A4_EXTRA_PAPER => [668.98, 912.76], //    (236 mm by 322 mm)
-        PageSetup::PAPERSIZE_LETTER_TRANSVERSE_PAPER => [595.80, 792.00], //    (8.275 in. by 11 in.)
-        PageSetup::PAPERSIZE_A4_TRANSVERSE_PAPER => 'A4', //    (210 mm by 297 mm)
-        PageSetup::PAPERSIZE_LETTER_EXTRA_TRANSVERSE_PAPER => [667.80, 864.00], //    (9.275 in. by 12 in.)
-        PageSetup::PAPERSIZE_SUPERA_SUPERA_A4_PAPER => [643.46, 1009.13], //    (227 mm by 356 mm)
-        PageSetup::PAPERSIZE_SUPERB_SUPERB_A3_PAPER => [864.57, 1380.47], //    (305 mm by 487 mm)
-        PageSetup::PAPERSIZE_LETTER_PLUS_PAPER => [612.00, 913.68], //    (8.5 in. by 12.69 in.)
-        PageSetup::PAPERSIZE_A4_PLUS_PAPER => [595.28, 935.43], //    (210 mm by 330 mm)
-        PageSetup::PAPERSIZE_A5_TRANSVERSE_PAPER => 'A5', //    (148 mm by 210 mm)
-        PageSetup::PAPERSIZE_JIS_B5_TRANSVERSE_PAPER => [515.91, 728.50], //    (182 mm by 257 mm)
-        PageSetup::PAPERSIZE_A3_EXTRA_PAPER => [912.76, 1261.42], //    (322 mm by 445 mm)
-        PageSetup::PAPERSIZE_A5_EXTRA_PAPER => [493.23, 666.14], //    (174 mm by 235 mm)
-        PageSetup::PAPERSIZE_ISO_B5_EXTRA_PAPER => [569.76, 782.36], //    (201 mm by 276 mm)
-        PageSetup::PAPERSIZE_A2_PAPER => 'A2', //    (420 mm by 594 mm)
-        PageSetup::PAPERSIZE_A3_TRANSVERSE_PAPER => 'A3', //    (297 mm by 420 mm)
-        PageSetup::PAPERSIZE_A3_EXTRA_TRANSVERSE_PAPER => [912.76, 1261.42], //    (322 mm by 445 mm)
-    ];
-
-    /**
-     * Create a new PDF Writer instance.
-     *
-     * @param Spreadsheet $spreadsheet Spreadsheet object
-     */
-    public function __construct(Spreadsheet $spreadsheet)
-    {
-        parent::__construct($spreadsheet);
-        $this->setUseInlineCss(true);
-        $this->tempDir = File::sysGetTempDir();
-    }
-
-    /**
-     * Get Font.
-     *
-     * @return string
-     */
-    public function getFont()
-    {
-        return $this->font;
-    }
-
-    /**
-     * Set font. Examples:
-     *      'arialunicid0-chinese-simplified'
-     *      'arialunicid0-chinese-traditional'
-     *      'arialunicid0-korean'
-     *      'arialunicid0-japanese'.
-     *
-     * @param string $fontName
-     */
-    public function setFont($fontName)
-    {
-        $this->font = $fontName;
-
-        return $this;
-    }
-
-    /**
-     * Get Paper Size.
-     *
-     * @return int
-     */
-    public function getPaperSize()
-    {
-        return $this->paperSize;
-    }
-
-    /**
-     * Set Paper Size.
-     *
-     * @param string $pValue Paper size see PageSetup::PAPERSIZE_*
-     *
-     * @return self
-     */
-    public function setPaperSize($pValue)
-    {
-        $this->paperSize = $pValue;
-
-        return $this;
-    }
-
-    /**
-     * Get Orientation.
-     *
-     * @return string
-     */
-    public function getOrientation()
-    {
-        return $this->orientation;
-    }
-
-    /**
-     * Set Orientation.
-     *
-     * @param string $pValue Page orientation see PageSetup::ORIENTATION_*
-     *
-     * @return self
-     */
-    public function setOrientation($pValue)
-    {
-        $this->orientation = $pValue;
-
-        return $this;
-    }
-
-    /**
-     * Get temporary storage directory.
-     *
-     * @return string
-     */
-    public function getTempDir()
-    {
-        return $this->tempDir;
-    }
-
-    /**
-     * Set temporary storage directory.
-     *
-     * @param string $pValue Temporary storage directory
-     *
-     * @throws WriterException when directory does not exist
-     *
-     * @return self
-     */
-    public function setTempDir($pValue)
-    {
-        if (is_dir($pValue)) {
-            $this->tempDir = $pValue;
-        } else {
-            throw new WriterException("Directory does not exist: $pValue");
-        }
-
-        return $this;
-    }
-
-    /**
-     * Save Spreadsheet to PDF file, pre-save.
-     *
-     * @param string $pFilename Name of the file to save as
-     *
-     * @throws WriterException
-     */
-    protected function prepareForSave($pFilename)
-    {
-        //  garbage collect
-        $this->spreadsheet->garbageCollect();
-
-        $this->saveArrayReturnType = Calculation::getArrayReturnType();
-        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_VALUE);
-
-        //  Open file
-        $fileHandle = fopen($pFilename, 'w');
-        if ($fileHandle === false) {
-            throw new WriterException("Could not open file $pFilename for writing.");
-        }
-
-        //  Set PDF
-        $this->isPdf = true;
-        //  Build CSS
-        $this->buildCSS(true);
-
-        return $fileHandle;
-    }
-
-    /**
-     * Save PhpSpreadsheet to PDF file, post-save.
-     *
-     * @param resource $fileHandle
-     *
-     * @throws WriterException
-     */
-    protected function restoreStateAfterSave($fileHandle)
-    {
-        //  Close file
-        fclose($fileHandle);
-
-        Calculation::setArrayReturnType($this->saveArrayReturnType);
-    }
-}
diff --git a/src/PhpSpreadsheet/Writer/Pdf/DomPDF.php b/src/PhpSpreadsheet/Writer/Pdf/DomPDF.php
index 0c4b39e9..363dd127 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/DomPDF.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/DomPDF.php
@@ -4,8 +4,9 @@ namespace PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
 use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
 use PhpOffice\PhpSpreadsheet\Writer\IWriter;
+use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
-class DomPDF extends Core implements IWriter
+class DomPDF extends Pdf implements IWriter
 {
     /**
      * Save Spreadsheet to file.
diff --git a/src/PhpSpreadsheet/Writer/Pdf/MPDF.php b/src/PhpSpreadsheet/Writer/Pdf/MPDF.php
index c97197bb..385eab6a 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/MPDF.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/MPDF.php
@@ -5,8 +5,9 @@ namespace PhpOffice\PhpSpreadsheet\Writer\Pdf;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
 use PhpOffice\PhpSpreadsheet\Writer\IWriter;
+use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
-class MPDF extends Core implements IWriter
+class MPDF extends Pdf implements IWriter
 {
     /**
      * Save Spreadsheet to file.
diff --git a/src/PhpSpreadsheet/Writer/Pdf/TcPDF.php b/src/PhpSpreadsheet/Writer/Pdf/TcPDF.php
index 42f577ed..e5e9d2e1 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/TcPDF.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/TcPDF.php
@@ -4,8 +4,9 @@ namespace PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
 use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
 use PhpOffice\PhpSpreadsheet\Writer\IWriter;
+use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
-class TcPDF extends Core implements IWriter
+class TcPDF extends Pdf implements IWriter
 {
     /**
      * Save Spreadsheet to file.