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2025-09-12 02:09:05 +00:00 · 2017-04-29 21:42:37 +03:00
parent a5442faa12
commit f5d9dc3e14
56 changed files with 5308 additions and 288 deletions
--- a/QuickLook.Plugin/QuickLook.Plugin.PDFViewer/PdfFile.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.PDFViewer/PdfFile.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Drawing;
+using Size = System.Windows.Size;
+
+namespace QuickLook.Plugin.PDFViewer
+{
+    public class PdfFile : IDisposable
+    {
+        private readonly IntPtr _ctx;
+        private readonly IntPtr _doc;
+        private readonly IntPtr _stm;
+
+        public PdfFile(string path)
+        {
+            _ctx = LibMuPdf.NativeMethods.NewContext();
+            _stm = LibMuPdf.NativeMethods.OpenFile(_ctx, path);
+            _doc = LibMuPdf.NativeMethods.OpenDocumentStream(_ctx, _stm);
+
+            TotalPages = LibMuPdf.NativeMethods.CountPages(_doc);
+        }
+
+        public int TotalPages { get; }
+
+        public void Dispose()
+        {
+            LibMuPdf.NativeMethods.CloseDocument(_doc);
+            LibMuPdf.NativeMethods.CloseStream(_stm);
+            LibMuPdf.NativeMethods.FreeContext(_ctx);
+        }
+
+        public bool IsLastPage(int pageId)
+        {
+            return pageId >= TotalPages;
+        }
+
+        public Size GetPageSize(int pageId, double zoomFactor)
+        {
+            if (pageId < 0 || pageId >= TotalPages)
+                throw new OverflowException(
+                    $"Page id {pageId} should greater or equal than 0 and less than total page count {TotalPages}.");
+
+            var p = LibMuPdf.NativeMethods.LoadPage(_doc, pageId);
+
+            var realSize = new LibMuPdf.Rectangle();
+            LibMuPdf.NativeMethods.BoundPage(_doc, p, ref realSize);
+
+            var size = new Size
+            {
+                Width = realSize.Right * zoomFactor,
+                Height = realSize.Bottom * zoomFactor
+            };
+
+            LibMuPdf.NativeMethods.FreePage(_doc, p);
+
+            return size;
+        }
+
+        public Bitmap GetPage(int pageId, double zoomFactor)
+        {
+            if (pageId < 0 || pageId >= TotalPages)
+                throw new OverflowException(
+                    $"Page id {pageId} should greater or equal than 0 and less than total page count {TotalPages}.");
+
+            var p = LibMuPdf.NativeMethods.LoadPage(_doc, pageId);
+
+            var bmp = LibMuPdf.RenderPage(_ctx, _doc, p, zoomFactor);
+
+            LibMuPdf.NativeMethods.FreePage(_doc, p);
+
+            return bmp;
+        }
+    }
+}