Add WidgetWraper ImageProvider

 # Changelog
 # Changelog
 
 
-## 4.0.1
+## 4.1.0
 
 
 - Remove useless files
 - Remove useless files
+- Add WidgetWraper ImageProvider and deprecate wrapWidget()
 
 
 ## 4.0.0
 ## 4.0.0
 
 

@@ -15,13 +15,16 @@
  */
  */
 
 
 import 'dart:async';
 import 'dart:async';
+import 'dart:typed_data';
 import 'dart:ui' as ui;
 import 'dart:ui' as ui;
 
 
 import 'package:flutter/material.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/rendering.dart';
 import 'package:pdf/pdf.dart';
 import 'package:pdf/pdf.dart';
+import 'package:pdf/widgets.dart' as pw;
 
 
 /// Wrap a Flutter Widget identified by a GlobalKey to a PdfImage.
 /// Wrap a Flutter Widget identified by a GlobalKey to a PdfImage.
+@Deprecated('Use WidgetWraper.fromKey() instead')
 Future<PdfImage> wrapWidget(
 Future<PdfImage> wrapWidget(
   PdfDocument document, {
   PdfDocument document, {
   @required GlobalKey key,
   @required GlobalKey key,
@@ -40,3 +43,85 @@ Future<PdfImage> wrapWidget(
   return PdfImage(document,
   return PdfImage(document,
       image: imageData, width: image.width, height: image.height);
       image: imageData, width: image.width, height: image.height);
 }
 }
+
+/// ImageProvider that draws a Flutter Widget on a PDF document
+class WidgetWraper extends pw.ImageProvider {
+  WidgetWraper._(
+    this.bytes,
+    int width,
+    int height,
+    PdfImageOrientation orientation,
+    double dpi,
+  ) : super(width, height, orientation, dpi);
+
+  /// Wrap a Flutter Widget identified by a GlobalKey to an ImageProvider.
+  ///
+  /// Use it with a RepaintBoundary:
+  /// ```
+  /// final rb = GlobalKey();
+  ///
+  /// @override
+  /// Widget build(BuildContext context) {
+  ///   return RepaintBoundary(
+  ///       key: rb,
+  ///       child: FlutterLogo()
+  ///   );
+  /// }
+  ///
+  /// Future<Uint8List> _generatePdf(PdfPageFormat format) async {
+  ///   final pdf = pw.Document();
+  ///
+  ///   final image = await WidgetWraper.fromKey(key: rb);
+  ///
+  ///   pdf.addPage(
+  ///     pw.Page(
+  ///       build: (context) {
+  ///         return pw.Center(
+  ///           child: pw.Image(image),
+  ///         );
+  ///       },
+  ///     ),
+  ///   );
+  ///
+  ///   return pdf.save();
+  /// }
+  /// ```
+  static Future<WidgetWraper> fromKey({
+    @required GlobalKey key,
+    int width,
+    int height,
+    double pixelRatio = 1.0,
+    PdfImageOrientation orientation,
+    double dpi,
+  }) async {
+    assert(key != null);
+    assert(pixelRatio != null && pixelRatio > 0);
+
+    final RenderRepaintBoundary wrappedWidget =
+        key.currentContext.findRenderObject();
+    final image = await wrappedWidget.toImage(pixelRatio: pixelRatio);
+    final byteData = await image.toByteData(format: ui.ImageByteFormat.rawRgba);
+    final imageData = byteData.buffer.asUint8List();
+    return WidgetWraper._(
+      imageData,
+      image.width,
+      image.height,
+      orientation ?? PdfImageOrientation.topLeft,
+      dpi,
+    );
+  }
+
+  /// The image data
+  final Uint8List bytes;
+
+  @override
+  PdfImage buildImage(pw.Context context, {int width, int height}) {
+    return PdfImage(
+      context.document,
+      image: bytes,
+      width: width ?? this.width,
+      height: height ?? this.height,
+      orientation: orientation,
+    );
+  }
+}

@@ -4,7 +4,7 @@ description: Plugin that allows Flutter apps to generate and print documents to
 homepage: https://github.com/DavBfr/dart_pdf/tree/master/printing
 homepage: https://github.com/DavBfr/dart_pdf/tree/master/printing
 repository: https://github.com/DavBfr/dart_pdf
 repository: https://github.com/DavBfr/dart_pdf
 issue_tracker: https://github.com/DavBfr/dart_pdf/issues
 issue_tracker: https://github.com/DavBfr/dart_pdf/issues
-version: 4.0.1
+version: 4.1.0
 
 
 environment:
 environment:
   sdk: ">=2.3.0 <3.0.0"
   sdk: ">=2.3.0 <3.0.0"