diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00167722..4e19cb2d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - Implementation of the `ARRAYTOTEXT()` Excel Function
 - Support for [mitoteam/jpgraph](https://packagist.org/packages/mitoteam/jpgraph) implementation of
   JpGraph library to render charts added.
+- Charts: Add Gradients, Transparency, Hidden Axes, Rounded Corners, Trendlines.
 
 ### Changed
 
@@ -20,7 +21,12 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ### Deprecated
 
-- Nothing
+- Axis getLineProperty deprecated in favor of getLineColorProperty.
+- Moved majorGridlines and minorGridlines from Chart to Axis. Setting either in Chart constructor or through Chart methods, or getting either using Chart methods is deprecated.
+- Chart::EXCEL_COLOR_TYPE_* copied from Properties to ChartColor; use in Properties is deprecated.
+- ChartColor::EXCEL_COLOR_TYPE_ARGB deprecated in favor of EXCEL_COLOR_TYPE_RGB ("A" component was never allowed).
+- Misspelled Properties::LINE_STYLE_DASH_SQUERE_DOT deprecated in favor of LINE_STYLE_DASH_SQUARE_DOT.
+- Clone not permitted for Spreadsheet. Spreadsheet->copy() can be used instead.
 
 ### Removed
 
@@ -30,6 +36,14 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 - Fully flatten an array [Issue #2955](https://github.com/PHPOffice/PhpSpreadsheet/issues/2955) [PR #2956](https://github.com/PHPOffice/PhpSpreadsheet/pull/2956)
 - cellExists() and getCell() methods should support UTF-8 named cells [Issue #2987](https://github.com/PHPOffice/PhpSpreadsheet/issues/2987) [PR #2988](https://github.com/PHPOffice/PhpSpreadsheet/pull/2988)
+- Spreadsheet copy fixed, clone disabled. [PR #2951](https://github.com/PHPOffice/PhpSpreadsheet/pull/2951)
+- Fix PDF problems with text rotation and paper size. [Issue #1747](https://github.com/PHPOffice/PhpSpreadsheet/issues/1747) [Issue #1713](https://github.com/PHPOffice/PhpSpreadsheet/issues/1713) [PR #2960](https://github.com/PHPOffice/PhpSpreadsheet/pull/2960)
+- Limited support for chart titles as formulas [Issue #2965](https://github.com/PHPOffice/PhpSpreadsheet/issues/2965) [Issue #749](https://github.com/PHPOffice/PhpSpreadsheet/issues/749) [PR #2971](https://github.com/PHPOffice/PhpSpreadsheet/pull/2971)
+- Add Gradients, Transparency, and Hidden Axes to Chart [Issue #2257](https://github.com/PHPOffice/PhpSpreadsheet/issues/2257) [Issue #2229](https://github.com/PHPOffice/PhpSpreadsheet/issues/2929) [Issue #2935](https://github.com/PHPOffice/PhpSpreadsheet/issues/2935) [PR #2950](https://github.com/PHPOffice/PhpSpreadsheet/pull/2950)
+- Chart Support for Rounded Corners and Trendlines [Issue #2968](https://github.com/PHPOffice/PhpSpreadsheet/issues/2968) [Issue #2815](https://github.com/PHPOffice/PhpSpreadsheet/issues/2815) [PR #2976](https://github.com/PHPOffice/PhpSpreadsheet/pull/2976)
+- Add setName Method for Chart [Issue #2991](https://github.com/PHPOffice/PhpSpreadsheet/issues/2991) [PR #3001](https://github.com/PHPOffice/PhpSpreadsheet/pull/3001)
+- Eliminate partial dependency on php-intl in StringHelper [Issue #2982](https://github.com/PHPOffice/PhpSpreadsheet/issues/2982) [PR #2994](https://github.com/PHPOffice/PhpSpreadsheet/pull/2994)
+- Minor changes for Pdf [Issue #2999](https://github.com/PHPOffice/PhpSpreadsheet/issues/2999) [PR #3002](https://github.com/PHPOffice/PhpSpreadsheet/pull/3002) [PR #3006](https://github.com/PHPOffice/PhpSpreadsheet/pull/3006)
 
 ## 1.24.1 - 2022-07-18
 
diff --git a/composer.json b/composer.json
index 16991514..cda2dc96 100644
--- a/composer.json
+++ b/composer.json
@@ -81,20 +81,21 @@
         "dealerdirect/phpcodesniffer-composer-installer": "dev-master",
         "dompdf/dompdf": "^1.0 || ^2.0",
         "friendsofphp/php-cs-fixer": "^3.2",
-        "jpgraph/jpgraph": "^4.0",
+        "mitoteam/jpgraph": "^10.1",
         "mpdf/mpdf": "8.1.1",
         "phpcompatibility/php-compatibility": "^9.3",
         "phpstan/phpstan": "^1.1",
         "phpstan/phpstan-phpunit": "^1.0",
         "phpunit/phpunit": "^8.5 || ^9.0",
         "squizlabs/php_codesniffer": "^3.7",
-        "tecnickcom/tcpdf": "^6.4"
+        "tecnickcom/tcpdf": "6.5"
     },
     "suggest": {
+        "ext-intl": "PHP Internationalization Functions",
         "mpdf/mpdf": "Option for rendering PDF with PDF Writer",
-        "dompdf/dompdf": "Option for rendering PDF with PDF Writer (doesn't yet support PHP8)",
-        "tecnickcom/tcpdf": "Option for rendering PDF with PDF Writer (doesn't yet support PHP8)",
-        "jpgraph/jpgraph": "Option for rendering charts, or including charts with PDF or HTML Writers"
+        "dompdf/dompdf": "Option for rendering PDF with PDF Writer",
+        "tecnickcom/tcpdf": "Option for rendering PDF with PDF Writer",
+        "mitoteam/jpgraph": "Option for rendering charts, or including charts with PDF or HTML Writers"
     },
     "autoload": {
         "psr-4": {
diff --git a/composer.lock b/composer.lock
index 3f82754d..f54b9c58 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6cbb20f8d8f2daae0aeb72431cda0980",
+    "content-hash": "05bd955232ea7ceab5b849e990f593bd",
     "packages": [
         {
             "name": "ezyang/htmlpurifier",
@@ -1192,47 +1192,6 @@
             ],
             "time": "2021-12-11T16:25:08+00:00"
         },
-        {
-            "name": "jpgraph/jpgraph",
-            "version": "4.0.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/ztec/JpGraph.git",
-                "reference": "e82db7da6a546d3926c24c9a346226da7aa49094"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/ztec/JpGraph/zipball/e82db7da6a546d3926c24c9a346226da7aa49094",
-                "reference": "e82db7da6a546d3926c24c9a346226da7aa49094",
-                "shasum": ""
-            },
-            "type": "library",
-            "autoload": {
-                "classmap": [
-                    "lib/JpGraph.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "QPL 1.0"
-            ],
-            "authors": [
-                {
-                    "name": "JpGraph team"
-                }
-            ],
-            "description": "jpGraph, library to make graphs and charts",
-            "homepage": "http://jpgraph.net/",
-            "keywords": [
-                "chart",
-                "data",
-                "graph",
-                "jpgraph",
-                "pie"
-            ],
-            "abandoned": true,
-            "time": "2017-02-23T09:44:15+00:00"
-        },
         {
             "name": "masterminds/html5",
             "version": "2.7.5",
@@ -1298,6 +1257,49 @@
             ],
             "time": "2021-07-01T14:25:37+00:00"
         },
+        {
+            "name": "mitoteam/jpgraph",
+            "version": "10.1.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/mitoteam/jpgraph.git",
+                "reference": "425a2a0f0c97a28fe0aca60a4384ce85880e438a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/mitoteam/jpgraph/zipball/425a2a0f0c97a28fe0aca60a4384ce85880e438a",
+                "reference": "425a2a0f0c97a28fe0aca60a4384ce85880e438a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.5"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/MtJpGraph.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "QPL-1.0"
+            ],
+            "authors": [
+                {
+                    "name": "JpGraph team"
+                }
+            ],
+            "description": "Composer compatible version of JpGraph library with PHP 8.1 support",
+            "homepage": "https://github.com/mitoteam/jpgraph",
+            "keywords": [
+                "jpgraph"
+            ],
+            "support": {
+                "issues": "https://github.com/mitoteam/jpgraph/issues",
+                "source": "https://github.com/mitoteam/jpgraph/tree/10.1.3"
+            },
+            "time": "2022-07-05T16:46:34+00:00"
+        },
         {
             "name": "mpdf/mpdf",
             "version": "v8.1.1",
@@ -5082,16 +5084,16 @@
         },
         {
             "name": "tecnickcom/tcpdf",
-            "version": "6.4.4",
+            "version": "6.5.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/tecnickcom/TCPDF.git",
-                "reference": "42cd0f9786af7e5db4fcedaa66f717b0d0032320"
+                "reference": "cc54c1503685e618b23922f53635f46e87653662"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/tecnickcom/TCPDF/zipball/42cd0f9786af7e5db4fcedaa66f717b0d0032320",
-                "reference": "42cd0f9786af7e5db4fcedaa66f717b0d0032320",
+                "url": "https://api.github.com/repos/tecnickcom/TCPDF/zipball/cc54c1503685e618b23922f53635f46e87653662",
+                "reference": "cc54c1503685e618b23922f53635f46e87653662",
                 "shasum": ""
             },
             "require": {
@@ -5140,13 +5142,17 @@
                 "pdf417",
                 "qrcode"
             ],
+            "support": {
+                "issues": "https://github.com/tecnickcom/TCPDF/issues",
+                "source": "https://github.com/tecnickcom/TCPDF/tree/6.5.0"
+            },
             "funding": [
                 {
                     "url": "https://www.paypal.com/cgi-bin/webscr?cmd=_donations&currency_code=GBP&business=paypal@tecnick.com&item_name=donation%20for%20tcpdf%20project",
                     "type": "custom"
                 }
             ],
-            "time": "2021-12-31T08:39:24+00:00"
+            "time": "2022-08-12T07:50:54+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -5273,5 +5279,5 @@
         "ext-zlib": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "1.1.0"
+    "plugin-api-version": "2.2.0"
 }
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 92767872..5cac36a1 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -12,7 +12,6 @@ parameters:
     excludePaths:
         - src/PhpSpreadsheet/Chart/Renderer/JpGraph.php
         - src/PhpSpreadsheet/Chart/Renderer/JpGraphRendererBase.php
-        - src/PhpSpreadsheet/Chart/Renderer/MtJpGraphRenderer.php
     parallel:
         processTimeout: 300.0
     checkMissingIterableValueType: false
diff --git a/samples/Chart/32_Chart_read_write_HTML.php b/samples/Chart/32_Chart_read_write_HTML.php
index 5febbf93..90d61c5d 100644
--- a/samples/Chart/32_Chart_read_write_HTML.php
+++ b/samples/Chart/32_Chart_read_write_HTML.php
@@ -6,7 +6,8 @@ use PhpOffice\PhpSpreadsheet\Settings;
 require __DIR__ . '/../Header.php';
 
 // Change these values to select the Rendering library that you wish to use
-Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
+//Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
+Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\MtJpGraphRenderer::class);
 
 $inputFileType = 'Xlsx';
 $inputFileNames = __DIR__ . '/../templates/36write*.xlsx';
diff --git a/samples/Chart/32_Chart_read_write_PDF.php b/samples/Chart/32_Chart_read_write_PDF.php
index ee3ad0e0..214c3d38 100644
--- a/samples/Chart/32_Chart_read_write_PDF.php
+++ b/samples/Chart/32_Chart_read_write_PDF.php
@@ -8,7 +8,8 @@ require __DIR__ . '/../Header.php';
 IOFactory::registerWriter('Pdf', \PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf::class);
 
 // Change these values to select the Rendering library that you wish to use
-Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
+//Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
+Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\MtJpGraphRenderer::class);
 
 $inputFileType = 'Xlsx';
 $inputFileNames = __DIR__ . '/../templates/36write*.xlsx';
diff --git a/samples/Chart/35_Chart_render.php b/samples/Chart/35_Chart_render.php
index ebab16a7..2376008c 100644
--- a/samples/Chart/35_Chart_render.php
+++ b/samples/Chart/35_Chart_render.php
@@ -5,16 +5,13 @@ use PhpOffice\PhpSpreadsheet\Settings;
 
 require __DIR__ . '/../Header.php';
 
-if (PHP_VERSION_ID >= 80000) {
-    $helper->log('Jpgraph no longer runs against PHP8');
-    exit;
-}
-
 // Change these values to select the Rendering library that you wish to use
-Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
+//Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\JpGraph::class);
+Settings::setChartRenderer(\PhpOffice\PhpSpreadsheet\Chart\Renderer\MtJpGraphRenderer::class);
 
 $inputFileType = 'Xlsx';
 $inputFileNames = __DIR__ . '/../templates/32readwrite*[0-9].xlsx';
+//$inputFileNames = __DIR__ . '/../templates/32readwriteStockChart5.xlsx';
 
 if ((isset($argc)) && ($argc > 1)) {
     $inputFileNames = [];
@@ -24,6 +21,18 @@ if ((isset($argc)) && ($argc > 1)) {
 } else {
     $inputFileNames = glob($inputFileNames);
 }
+if (count($inputFileNames) === 1) {
+    $unresolvedErrors = [];
+} else {
+    $unresolvedErrors = [
+        '32readwriteBubbleChart2.xlsx',
+        '32readwritePieChart3.xlsx',
+        '32readwritePieChart4.xlsx',
+        '32readwritePieChart3D1.xlsx',
+        '32readwritePieChartExploded1.xlsx',
+        '32readwritePieChartExploded3D1.xlsx',
+    ];
+}
 foreach ($inputFileNames as $inputFileName) {
     $inputFileNameShort = basename($inputFileName);
 
@@ -32,6 +41,11 @@ foreach ($inputFileNames as $inputFileName) {
 
         continue;
     }
+    if (in_array($inputFileNameShort, $unresolvedErrors, true)) {
+        $helper->log('File ' . $inputFileNameShort . ' does not yet work with this script');
+
+        continue;
+    }
 
     $helper->log("Load Test from $inputFileType file " . $inputFileNameShort);
 
diff --git a/samples/Pdf/21a_Pdf.php b/samples/Pdf/21a_Pdf.php
index b5572afe..33b61c9f 100644
--- a/samples/Pdf/21a_Pdf.php
+++ b/samples/Pdf/21a_Pdf.php
@@ -12,6 +12,8 @@ $spreadsheet->getActiveSheet()->setShowGridLines(false);
 $helper->log('Set orientation to landscape');
 $spreadsheet->getActiveSheet()->getPageSetup()->setOrientation(PageSetup::ORIENTATION_LANDSCAPE);
 $spreadsheet->setActiveSheetIndex(0)->setPrintGridlines(true);
+// Issue 2299 - mpdf can't handle hide rows without kludge
+$spreadsheet->getActiveSheet()->getRowDimension(2)->setVisible(false);
 
 function changeGridlines(string $html): string
 {
diff --git a/src/PhpSpreadsheet/Chart/Chart.php b/src/PhpSpreadsheet/Chart/Chart.php
index 556b0eff..036338c6 100644
--- a/src/PhpSpreadsheet/Chart/Chart.php
+++ b/src/PhpSpreadsheet/Chart/Chart.php
@@ -188,6 +188,13 @@ class Chart
         return $this->name;
     }
 
+    public function setName(string $name): self
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
     /**
      * Get Worksheet.
      */
@@ -654,14 +661,10 @@ class Chart
 
     /**
      * Render the chart to given file (or stream).
-     * Unable to cover code until a usable current version of JpGraph
-     * is made available through Composer.
      *
      * @param string $outputDestination Name of the file render to
      *
      * @return bool true on success
-     *
-     * @codeCoverageIgnore
      */
     public function render($outputDestination = null)
     {
diff --git a/src/PhpSpreadsheet/Chart/Renderer/JpGraphRendererBase.php b/src/PhpSpreadsheet/Chart/Renderer/JpGraphRendererBase.php
index 4d5526b8..f0ce1f65 100644
--- a/src/PhpSpreadsheet/Chart/Renderer/JpGraphRendererBase.php
+++ b/src/PhpSpreadsheet/Chart/Renderer/JpGraphRendererBase.php
@@ -277,7 +277,8 @@ abstract class JpGraphRendererBase implements IRenderer
     {
         $grouping = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
 
-        $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex(0)->getPointCount();
+        $index = array_keys($this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotOrder())[0];
+        $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($index)->getPointCount();
         if ($labelCount > 0) {
             $datasetLabels = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getDataValues();
             $datasetLabels = $this->formatDataSetLabels($groupID, $datasetLabels, $labelCount);
@@ -294,8 +295,9 @@ abstract class JpGraphRendererBase implements IRenderer
 
         //    Loop through each data series in turn
         for ($i = 0; $i < $seriesCount; ++$i) {
-            $dataValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
-            $marker = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getPointMarker();
+            $index = array_keys($this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotOrder())[$i];
+            $dataValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($index)->getDataValues();
+            $marker = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($index)->getPointMarker();
 
             if ($grouping == 'percentStacked') {
                 $dataValues = $this->percentageAdjustValues($dataValues, $sumValues);
@@ -324,7 +326,7 @@ abstract class JpGraphRendererBase implements IRenderer
                 //    Set the appropriate plot marker
                 $this->formatPointMarker($seriesPlot, $marker);
             }
-            $dataLabel = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotLabelByIndex($i)->getDataValue();
+            $dataLabel = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotLabelByIndex($index)->getDataValue();
             $seriesPlot->SetLegend($dataLabel);
 
             $seriesPlots[] = $seriesPlot;
@@ -347,7 +349,8 @@ abstract class JpGraphRendererBase implements IRenderer
         }
         $grouping = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
 
-        $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex(0)->getPointCount();
+        $index = array_keys($this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotOrder())[0];
+        $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($index)->getPointCount();
         if ($labelCount > 0) {
             $datasetLabels = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getDataValues();
             $datasetLabels = $this->formatDataSetLabels($groupID, $datasetLabels, $labelCount, $rotation);
@@ -371,7 +374,8 @@ abstract class JpGraphRendererBase implements IRenderer
 
         //    Loop through each data series in turn
         for ($j = 0; $j < $seriesCount; ++$j) {
-            $dataValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($j)->getDataValues();
+            $index = array_keys($this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotOrder())[$j];
+            $dataValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($index)->getDataValues();
             if ($grouping == 'percentStacked') {
                 $dataValues = $this->percentageAdjustValues($dataValues, $sumValues);
             }
@@ -535,6 +539,10 @@ abstract class JpGraphRendererBase implements IRenderer
         $dataValues = [];
         //    Loop through each data series in turn and build the plot arrays
         foreach ($plotOrder as $i => $v) {
+            $dataValuesX = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($v);
+            if ($dataValuesX === false) {
+                continue;
+            }
             $dataValuesX = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($v)->getDataValues();
             foreach ($dataValuesX as $j => $dataValueX) {
                 $dataValues[$plotOrder[$i]][$j] = $dataValueX;
@@ -549,7 +557,7 @@ abstract class JpGraphRendererBase implements IRenderer
         $jMax = count($dataValues[0]);
         for ($j = 0; $j < $jMax; ++$j) {
             for ($i = 0; $i < $seriesCount; ++$i) {
-                $dataValuesPlot[] = $dataValues[$i][$j];
+                $dataValuesPlot[] = $dataValues[$i][$j] ?? null;
             }
         }
 
diff --git a/src/PhpSpreadsheet/Chart/Renderer/MtJpGraphRenderer.php b/src/PhpSpreadsheet/Chart/Renderer/MtJpGraphRenderer.php
index 3fef3b6e..e1f0f90a 100644
--- a/src/PhpSpreadsheet/Chart/Renderer/MtJpGraphRenderer.php
+++ b/src/PhpSpreadsheet/Chart/Renderer/MtJpGraphRenderer.php
@@ -9,8 +9,6 @@ namespace PhpOffice\PhpSpreadsheet\Chart\Renderer;
  * https://packagist.org/packages/mitoteam/jpgraph
  *
  * This package is up to date for August 2022 and has PHP 8.1 support.
- *
- * @codeCoverageIgnore
  */
 class MtJpGraphRenderer extends JpGraphRendererBase
 {
diff --git a/src/PhpSpreadsheet/Shared/StringHelper.php b/src/PhpSpreadsheet/Shared/StringHelper.php
index 030df66d..0fe10e4d 100644
--- a/src/PhpSpreadsheet/Shared/StringHelper.php
+++ b/src/PhpSpreadsheet/Shared/StringHelper.php
@@ -3,7 +3,6 @@
 namespace PhpOffice\PhpSpreadsheet\Shared;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
-use UConverter;
 
 class StringHelper
 {
@@ -334,26 +333,13 @@ class StringHelper
     public static function sanitizeUTF8(string $textValue): string
     {
         $textValue = str_replace(["\xef\xbf\xbe", "\xef\xbf\xbf"], "\xef\xbf\xbd", $textValue);
-        if (class_exists(UConverter::class)) {
-            $returnValue = UConverter::transcode($textValue, 'UTF-8', 'UTF-8');
-            if ($returnValue !== false) {
-                return $returnValue;
-            }
-        }
-        // @codeCoverageIgnoreStart
-        // I don't think any of the code below should ever be executed.
-        if (self::getIsIconvEnabled()) {
-            $returnValue = @iconv('UTF-8', 'UTF-8', $textValue);
-            if ($returnValue !== false) {
-                return $returnValue;
-            }
-        }
-
+        $subst = mb_substitute_character(); // default is question mark
+        mb_substitute_character(65533); // Unicode substitution character
         // Phpstan does not think this can return false.
         $returnValue = mb_convert_encoding($textValue, 'UTF-8', 'UTF-8');
+        mb_substitute_character($subst);
 
         return $returnValue;
-        // @codeCoverageIgnoreEnd
     }
 
     /**
diff --git a/src/PhpSpreadsheet/Writer/Html.php b/src/PhpSpreadsheet/Writer/Html.php
index 6e51b7a8..362eae00 100644
--- a/src/PhpSpreadsheet/Writer/Html.php
+++ b/src/PhpSpreadsheet/Writer/Html.php
@@ -54,7 +54,7 @@ class Html extends BaseWriter
      *
      * @var bool
      */
-    private $embedImages = false;
+    protected $embedImages = false;
 
     /**
      * Use inline CSS?
@@ -551,15 +551,10 @@ class Html extends BaseWriter
      * Extend Row if chart is placed after nominal end of row.
      * This code should be exercised by sample:
      * Chart/32_Chart_read_write_PDF.php.
-     * However, that test is suppressed due to out-of-date
-     * Jpgraph code issuing warnings. So, don't measure
-     * code coverage for this function till that is fixed.
      *
      * @param int $row Row to check for charts
      *
      * @return array
-     *
-     * @codeCoverageIgnore
      */
     private function extendRowsForCharts(Worksheet $worksheet, int $row)
     {
@@ -635,11 +630,12 @@ class Html extends BaseWriter
      *
      * @return string
      */
-    public static function winFileToUrl($filename)
+    public static function winFileToUrl($filename, bool $mpdf = false)
     {
         // Windows filename
         if (substr($filename, 1, 2) === ':\\') {
-            $filename = 'file:///' . str_replace('\\', '/', $filename);
+            $protocol = $mpdf ? '' : 'file:///';
+            $filename = $protocol . str_replace('\\', '/', $filename);
         }
 
         return $filename;
@@ -681,9 +677,9 @@ class Html extends BaseWriter
                 $filename = htmlspecialchars($filename, Settings::htmlEntityFlags());
 
                 $html .= PHP_EOL;
-                $imageData = self::winFileToUrl($filename);
+                $imageData = self::winFileToUrl($filename, $this->isMPdf);
 
-                if (($this->embedImages && !$this->isPdf) || substr($imageData, 0, 6) === 'zip://') {
+                if ($this->embedImages || substr($imageData, 0, 6) === 'zip://') {
                     $picture = @file_get_contents($filename);
                     if ($picture !== false) {
                         $imageDetails = getimagesize($filename);
@@ -725,11 +721,6 @@ class Html extends BaseWriter
      * Generate chart tag in cell.
      * This code should be exercised by sample:
      * Chart/32_Chart_read_write_PDF.php.
-     * However, that test is suppressed due to out-of-date
-     * Jpgraph code issuing warnings. So, don't measure
-     * code coverage for this function till that is fixed.
-     *
-     * @codeCoverageIgnore
      */
     private function writeChartInCell(Worksheet $worksheet, string $coordinates): string
     {
@@ -1170,9 +1161,9 @@ class Html extends BaseWriter
         $html = '';
         $id = $showid ? "id='sheet$sheetIndex'" : '';
         if ($showid) {
-            $html .= "<div style='page: page$sheetIndex'>\n";
+            $html .= "<div style='page: page$sheetIndex'>" . PHP_EOL;
         } else {
-            $html .= "<div style='page: page$sheetIndex' class='scrpgbrk'>\n";
+            $html .= "<div style='page: page$sheetIndex' class='scrpgbrk'>" . PHP_EOL;
         }
 
         $this->generateTableTag($worksheet, $id, $html, $sheetIndex);
@@ -1467,6 +1458,10 @@ class Html extends BaseWriter
         // Sheet index
         $sheetIndex = $worksheet->getParent()->getIndex($worksheet);
         $html = $this->generateRowStart($worksheet, $sheetIndex, $row);
+        $generateDiv = $this->isMPdf && $worksheet->getRowDimension($row + 1)->getVisible() === false;
+        if ($generateDiv) {
+            $html .= '<div style="visibility:hidden; display:none;">' . PHP_EOL;
+        }
 
         // Write cells
         $colNum = 0;
@@ -1514,6 +1509,9 @@ class Html extends BaseWriter
         }
 
         // Write row end
+        if ($generateDiv) {
+            $html .= '</div>' . PHP_EOL;
+        }
         $html .= '          </tr>' . PHP_EOL;
 
         // Return
@@ -1844,26 +1842,26 @@ class Html extends BaseWriter
             } elseif ($orientation === \PhpOffice\PhpSpreadsheet\Worksheet\PageSetup::ORIENTATION_PORTRAIT) {
                 $htmlPage .= 'size: portrait; ';
             }
-            $htmlPage .= "}\n";
+            $htmlPage .= '}' . PHP_EOL;
             ++$sheetId;
         }
-        $htmlPage .= <<<EOF
-.navigation {page-break-after: always;}
-.scrpgbrk, div + div {page-break-before: always;}
-@media screen {
-  .gridlines td {border: 1px solid black;}
-  .gridlines th {border: 1px solid black;}
-  body>div {margin-top: 5px;}
-  body>div:first-child {margin-top: 0;}
-  .scrpgbrk {margin-top: 1px;}
-}
-@media print {
-  .gridlinesp td {border: 1px solid black;}
-  .gridlinesp th {border: 1px solid black;}
-  .navigation {display: none;}
-}
-
-EOF;
+        $htmlPage .= implode(PHP_EOL, [
+            '.navigation {page-break-after: always;}',
+            '.scrpgbrk, div + div {page-break-before: always;}',
+            '@media screen {',
+            '  .gridlines td {border: 1px solid black;}',
+            '  .gridlines th {border: 1px solid black;}',
+            '  body>div {margin-top: 5px;}',
+            '  body>div:first-child {margin-top: 0;}',
+            '  .scrpgbrk {margin-top: 1px;}',
+            '}',
+            '@media print {',
+            '  .gridlinesp td {border: 1px solid black;}',
+            '  .gridlinesp th {border: 1px solid black;}',
+            '  .navigation {display: none;}',
+            '}',
+            '',
+        ]);
         $htmlPage .= $generateSurroundingHTML ? ('</style>' . PHP_EOL) : '';
 
         return $htmlPage;
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php b/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
index bf9e28cb..cd17cccf 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
@@ -7,6 +7,13 @@ use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
 class Dompdf extends Pdf
 {
+    /**
+     * embed images, or link to images.
+     *
+     * @var bool
+     */
+    protected $embedImages = true;
+
     /**
      * Gets the implementation of external PDF library that should be used.
      *
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php b/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
index d29d4764..aefc6b56 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
@@ -77,7 +77,7 @@ class Tcpdf extends Pdf
         $pdf->SetCreator($this->spreadsheet->getProperties()->getCreator());
 
         //  Write to file
-        fwrite($fileHandle, $pdf->output($filename, 'S'));
+        fwrite($fileHandle, $pdf->output('', 'S'));
 
         parent::restoreStateAfterSave();
     }
diff --git a/tests/PhpSpreadsheetTests/Chart/ChartMethodTest.php b/tests/PhpSpreadsheetTests/Chart/ChartMethodTest.php
index 027ddc53..5c3622ad 100644
--- a/tests/PhpSpreadsheetTests/Chart/ChartMethodTest.php
+++ b/tests/PhpSpreadsheetTests/Chart/ChartMethodTest.php
@@ -93,8 +93,9 @@ class ChartMethodTest extends TestCase
             $xAxis, // xAxis
             $yAxis // yAxis
         );
-        $chart2 = new Chart('chart1');
+        $chart2 = new Chart('xyz');
         $chart2
+            ->setName('chart1')
             ->setLegend($legend)
             ->setPlotArea($plotArea)
             ->setPlotVisibleOnly(true)
diff --git a/tests/PhpSpreadsheetTests/Chart/RenderTest.php b/tests/PhpSpreadsheetTests/Chart/RenderTest.php
new file mode 100644
index 00000000..f0eaffee
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Chart/RenderTest.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Xlsx;
+
+use PhpOffice\PhpSpreadsheet\Chart\Chart;
+use PHPUnit\Framework\TestCase;
+
+class RenderTest extends TestCase
+{
+    public function testNoRenderer(): void
+    {
+        $chart = new Chart('Chart1');
+        self::assertFalse($chart->render());
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Functional/StreamTest.php b/tests/PhpSpreadsheetTests/Functional/StreamTest.php
index a84a2490..05b87ab9 100644
--- a/tests/PhpSpreadsheetTests/Functional/StreamTest.php
+++ b/tests/PhpSpreadsheetTests/Functional/StreamTest.php
@@ -18,15 +18,9 @@ class StreamTest extends TestCase
             ['Html'],
             ['Mpdf'],
             ['Dompdf'],
+            ['Tcpdf'],
         ];
 
-        if (\PHP_VERSION_ID < 80000) {
-            $providerFormats = array_merge(
-                $providerFormats,
-                [['Tcpdf']]
-            );
-        }
-
         return $providerFormats;
     }
 
diff --git a/tests/PhpSpreadsheetTests/Helper/SampleTest.php b/tests/PhpSpreadsheetTests/Helper/SampleTest.php
index 50a650f8..a104e8ff 100644
--- a/tests/PhpSpreadsheetTests/Helper/SampleTest.php
+++ b/tests/PhpSpreadsheetTests/Helper/SampleTest.php
@@ -26,10 +26,13 @@ class SampleTest extends TestCase
     public function providerSample(): array
     {
         $skipped = [
-            'Chart/32_Chart_read_write_PDF.php', // Unfortunately JpGraph is not up to date for latest PHP and raise many warnings
-            'Chart/32_Chart_read_write_HTML.php', // idem
-            'Chart/35_Chart_render.php', // idem
         ];
+        if (PHP_VERSION_ID >= 80200) {
+            // Hopefully temporary. Continue to try
+            //  32_chart_read_write_PDF/HTML
+            // so as not to lose track of the problem.
+            $skipped[] = 'Chart/35_Chart_render.php';
+        }
 
         // Unfortunately some tests are too long to run with code-coverage
         // analysis on GitHub Actions, so we need to exclude them