Revert "improve:pdf插入"

This reverts commit bad05f77b5.
2026-04-05 19:07:31 +08:00
parent ebbe018bae
commit d80a59556e
6 changed files with 3 additions and 337 deletions
@@ -1,62 +0,0 @@
-using System;
-using System.Threading.Tasks;
-using System.Windows.Media.Imaging;
-
-namespace Ink_Canvas.Helpers
-{
-    /// <summary>
-    /// PDF 页数与位图渲染：优先 <see cref="PdfWinRtHelper"/>（Windows.Data.Pdf），失败或无效结果时使用 PDFtoImage(MIT) 备用。
-    /// </summary>
-    internal static class PdfDocumentRenderHelper
-    {
-        public static async Task<uint> GetPageCountAsync(string pdfPath)
-        {
-            uint winRt = 0;
-            try
-            {
-                winRt = await PdfWinRtHelper.GetPageCountAsync(pdfPath).ConfigureAwait(false);
-            }
-            catch (Exception ex)
-            {
-                LogHelper.WriteLogToFile($"PDF WinRT 获取页数失败，将尝试 PDFtoImage(MIT): {ex.Message}", LogHelper.LogType.Warning);
-            }
-
-            if (winRt > 0)
-                return winRt;
-
-            try
-            {
-                return await Task.Run(() => PdfToImageMitHelper.GetPageCount(pdfPath)).ConfigureAwait(false);
-            }
-            catch (Exception ex)
-            {
-                LogHelper.WriteLogToFile($"PDFtoImage(MIT) 获取页数失败: {ex.Message}", LogHelper.LogType.Warning);
-                return 0;
-            }
-        }
-
-        public static async Task<BitmapSource> RenderPageToBitmapSourceAsync(string pdfPath, uint pageIndex)
-        {
-            try
-            {
-                BitmapSource win = await PdfWinRtHelper.RenderPageToBitmapSourceAsync(pdfPath, pageIndex).ConfigureAwait(false);
-                if (win != null)
-                    return win;
-            }
-            catch (Exception ex)
-            {
-                LogHelper.WriteLogToFile($"PDF WinRT 渲染失败，将尝试 PDFtoImage(MIT): {ex.Message}", LogHelper.LogType.Warning);
-            }
-
-            try
-            {
-                return await PdfToImageMitHelper.RenderPageToBitmapSourceAsync(pdfPath, pageIndex).ConfigureAwait(false);
-            }
-            catch (Exception ex)
-            {
-                LogHelper.WriteLogToFile($"PDFtoImage(MIT) 渲染失败: {ex.Message}", LogHelper.LogType.Warning);
-                return null;
-            }
-        }
-    }
-}
@@ -1,96 +0,0 @@
-using PDFtoImage;
-using SkiaSharp;
-using System;
-using System.IO;
-using System.Threading.Tasks;
-using System.Windows;
-using System.Windows.Media.Imaging;
-
-namespace Ink_Canvas.Helpers
-{
-    /// <summary>
-    /// 使用 NuGet「PDFtoImage」(MIT，基于 PDFium/SkiaSharp) 解析/渲染 PDF，作为 WinRT 不可用时的备用实现。
-    /// </summary>
-    internal static class PdfToImageMitHelper
-    {
-        public static uint GetPageCount(string pdfPath)
-        {
-            if (string.IsNullOrWhiteSpace(pdfPath) || !File.Exists(pdfPath))
-                return 0;
-
-            try
-            {
-                using (var fs = new FileStream(pdfPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
-                {
-                    int n = Conversion.GetPageCount(fs, leaveOpen: true, password: null);
-                    return n < 0 ? 0u : (uint)n;
-                }
-            }
-            catch
-            {
-                return 0;
-            }
-        }
-
-        /// <summary>
-        /// 在工作线程加载 PDF 页为 <see cref="SKBitmap"/>，在 UI 线程编码为 WPF <see cref="BitmapSource"/>。
-        /// </summary>
-        public static async Task<BitmapSource> RenderPageToBitmapSourceAsync(string pdfPath, uint pageIndex)
-        {
-            if (string.IsNullOrWhiteSpace(pdfPath) || !File.Exists(pdfPath))
-                return null;
-
-            int page = checked((int)pageIndex);
-
-            SKBitmap skBitmap = await Task.Run(() =>
-            {
-                try
-                {
-                    using (var fs = new FileStream(pdfPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
-                    {
-                        return Conversion.ToImage(fs, System.Index.FromStart(page), leaveOpen: true, password: null, options: default);
-                    }
-                }
-                catch
-                {
-                    return null;
-                }
-            }).ConfigureAwait(false);
-
-            if (skBitmap == null)
-                return null;
-
-            try
-            {
-                if (Application.Current?.Dispatcher == null)
-                    return null;
-
-                return await Application.Current.Dispatcher.InvokeAsync(() => EncodeSkBitmapToBitmapSource(skBitmap));
-            }
-            finally
-            {
-                skBitmap.Dispose();
-            }
-        }
-
-        private static BitmapSource EncodeSkBitmapToBitmapSource(SKBitmap bitmap)
-        {
-            using (var image = SKImage.FromBitmap(bitmap))
-            using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
-            {
-                var ms = new MemoryStream();
-                data.SaveTo(ms);
-                ms.Position = 0;
-
-                var bi = new BitmapImage();
-                bi.BeginInit();
-                bi.StreamSource = ms;
-                bi.CacheOption = BitmapCacheOption.OnLoad;
-                bi.EndInit();
-                bi.Freeze();
-                ms.Dispose();
-                return bi;
-            }
-        }
-    }
-}