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);
    }
}