The pdf page display is not clear when using PdfDocumentViewBuilder.file()

[paladinghub]

using PdfDocumentViewBuilder.file() to open a pdf file,the pdf page display is not clear.but when i open the same pdf file with PdfViewer.file(),it is very clear.And I found PdfPageView can set maximumDpi,but no matter how this parameter is set ,it does not work. So what should i do to Improve the display clarity of PDF pages using PdfDocumentViewBuilder.file?

[paladinghub]

another inforamtion

Flutter 3.27.0 • channel stable • https://github.com/flutter/flutter.git Framework • revision 8495dee1fd (3 weeks ago) • 2024-12-10 14:23:39 -0800 Engine • revision 83bacfc525 Tools • Dart 3.6.0 • DevTools 2.40.2

windows version Windows 11 pro 23H2

[paladinghub]

import 'package:flutter/material.dart';
import 'package:pdfrx/pdfrx.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: 'Pdfrx example',
      home: MainPage(),
    );
  }
}

class MainPage extends StatefulWidget {
  const MainPage({super.key});

  @override
  State<MainPage> createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          leading: IconButton(
            icon: const Icon(Icons.menu),
            onPressed: () {},
          ),
          title: const Text('Pdfrx example'),
        ),
        body: PdfDocumentViewBuilder.file(
          'D:/c.pdf',
          builder: (context, document) => ListView.builder(
            padding: const EdgeInsets.all(5),
            itemExtent: document?.pages.first.height ?? 800,
            itemCount: document?.pages.length ?? 0,
            // cacheExtent: 500,
            itemBuilder: (context, index) {
              return Container(
                height: document?.pages.first.height,
                width: document?.pages.first.width,
                child: PdfPageView(
                  document: document,
                  pageNumber: index + 1,
                  alignment: Alignment.center,
                ),
              );
            },
          ),
        )
        // PdfViewer.file(
        //   'D:/c.pdf',
        //   passwordProvider: () => 'test',
        // ),
        );
  }
}

c.pdf

[espresso3389]

Please note that the width/height returned by PdfPage.width/PdfPage.width, is points (height in pixels at 72 dpi), not in pixel.

And, if you want to calculate the PDF resolution by yourself, you can use PdfPageView.pageSizeCallback.

[paladinghub]

@espresso3389 Thanks for your generosity reminder . I noticed biggestSize and pageSize have a fixed proportional relationship and the calculation logic of PageSize in pdf_widgets.dart ,it helps me

[paladinghub]

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