Printing: Use FPDF_RenderPage instead of FPDF_RenderPageBitmap to allow vector graphics

2026-08-10 18:35:49 +02:00
parent f13a836ebd
commit 20b19775b1
6 changed files with 365 additions and 118 deletions
@@ -0,0 +1,38 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Elwig.Helpers.Printing {
+    internal partial class PdfiumNative {
+
+        public const int FPDF_ANNOT = 0x01;
+        public const int FPDF_PRINTING = 0x800;
+
+        [LibraryImport("pdfium.dll")]
+        public static partial void FPDF_InitLibrary();
+
+        [LibraryImport("pdfium.dll")]
+        public static partial void FPDF_DestroyLibrary();
+
+        [LibraryImport("pdfium.dll", StringMarshalling = StringMarshalling.Utf8)]
+        public static partial IntPtr FPDF_LoadDocument(string filePath, string? password);
+
+        [LibraryImport("pdfium.dll")]
+        public static partial void FPDF_CloseDocument(IntPtr document);
+
+        [LibraryImport("pdfium.dll")]
+        public static partial int FPDF_GetPageCount(IntPtr document);
+
+        [LibraryImport("pdfium.dll")]
+        public static partial IntPtr FPDF_LoadPage(IntPtr document, int pageIndex);
+
+        [LibraryImport("pdfium.dll")]
+        public static partial void FPDF_ClosePage(IntPtr page);
+
+        [LibraryImport("pdfium.dll")]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        public static partial bool FPDF_GetPageSizeByIndex(IntPtr document, int pageIndex, out double width, out double height);
+
+        [LibraryImport("pdfium.dll")]
+        public static partial void FPDF_RenderPage(IntPtr hdc, IntPtr page, int startX, int startY, int sizeX, int sizeY, int rotate, int flags);
+    }
+}