mirror of
https://github.com/cyanfish/naps2.git
synced 2024-09-11 15:26:55 +03:00
155 lines
5.8 KiB
C#
155 lines
5.8 KiB
C#
using System.Runtime.InteropServices;
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using NAPS2.Util;
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using toff_t = System.IntPtr;
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using tsize_t = System.IntPtr;
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using thandle_t = System.IntPtr;
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using tdata_t = System.IntPtr;
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namespace NAPS2.Images.Gtk;
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internal static class LibTiff
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{
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private const int RTLD_LAZY = 1;
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private const int RTLD_GLOBAL = 8;
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private static readonly Dictionary<Type, object> FuncCache = new();
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private static readonly Lazy<IntPtr> LibraryHandle = new(() =>
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{
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var handle = dlopen("libtiff.so.5", RTLD_LAZY | RTLD_GLOBAL);
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if (handle == IntPtr.Zero)
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{
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handle = dlopen("libtiff.so.6", RTLD_LAZY | RTLD_GLOBAL);
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}
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if (handle == IntPtr.Zero)
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{
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var error = dlerror();
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throw new InvalidOperationException($"Could not load library: \"libtiff\". Error: {error}");
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}
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return handle;
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});
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public static T Load<T>()
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{
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return (T) FuncCache.Get(typeof(T), () => Marshal.GetDelegateForFunctionPointer<T>(LoadFunc<T>())!);
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}
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private static IntPtr LoadFunc<T>()
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{
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var symbol = typeof(T).Name.Split("_")[0];
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var ptr = dlsym(LibraryHandle.Value, symbol);
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if (ptr == IntPtr.Zero)
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{
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var error = dlerror();
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throw new InvalidOperationException($"Could not load symbol: \"{symbol}\". Error: {error}");
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}
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return ptr;
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}
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public delegate IntPtr TIFFOpen_d(string filename, string mode);
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public static TIFFOpen_d TIFFOpen => Load<TIFFOpen_d>();
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public delegate IntPtr TIFFSetErrorHandler_d(TIFFErrorHandler handler);
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public static TIFFSetErrorHandler_d TIFFSetErrorHandler => Load<TIFFSetErrorHandler_d>();
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public delegate IntPtr TIFFSetWarningHandler_d(TIFFErrorHandler handler);
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public static TIFFSetWarningHandler_d TIFFSetWarningHandler => Load<TIFFSetWarningHandler_d>();
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate void TIFFErrorHandler(string x, string y, IntPtr va_args);
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public delegate IntPtr TIFFClientOpen_d(string filename, string mode, IntPtr clientdata,
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TIFFReadWriteProc readproc, TIFFReadWriteProc writeproc, TIFFSeekProc seekproc, TIFFCloseProc closeproc,
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TIFFSizeProc sizeproc, TIFFMapFileProc mapproc, TIFFUnmapFileProc unmapproc);
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public static TIFFClientOpen_d TIFFClientOpen => Load<TIFFClientOpen_d>();
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate tsize_t TIFFReadWriteProc(thandle_t clientdata, tdata_t data, tsize_t size);
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate toff_t TIFFSeekProc(thandle_t clientdata, toff_t off, int c);
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate int TIFFCloseProc(thandle_t clientdata);
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate toff_t TIFFSizeProc(thandle_t clientdata);
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate int TIFFMapFileProc(thandle_t clientdata, ref tdata_t a, ref toff_t b);
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate void TIFFUnmapFileProc(thandle_t clientdata, tdata_t a, toff_t b);
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public delegate IntPtr TIFFClose_d(IntPtr tiff);
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public static TIFFClose_d TIFFClose => Load<TIFFClose_d>();
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public delegate short TIFFNumberOfDirectories_d(IntPtr tiff);
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public static TIFFNumberOfDirectories_d TIFFNumberOfDirectories => Load<TIFFNumberOfDirectories_d>();
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public delegate int TIFFReadDirectory_d(IntPtr tiff);
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public static TIFFReadDirectory_d TIFFReadDirectory => Load<TIFFReadDirectory_d>();
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public delegate int TIFFWriteDirectory_d(IntPtr tiff);
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public static TIFFWriteDirectory_d TIFFWriteDirectory => Load<TIFFWriteDirectory_d>();
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public delegate int TIFFGetField_d1(IntPtr tiff, TiffTag tag, out int field);
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public static TIFFGetField_d1 TIFFGetFieldInt => Load<TIFFGetField_d1>();
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public delegate int TIFFGetField_d2(IntPtr tiff, TiffTag tag, out float field);
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public static TIFFGetField_d2 TIFFGetFieldFloat => Load<TIFFGetField_d2>();
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public delegate int TIFFGetField_d3(IntPtr tiff, TiffTag tag, out double field);
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public static TIFFGetField_d3 TIFFGetFieldDouble => Load<TIFFGetField_d3>();
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public delegate int TIFFSetField_d1(IntPtr tiff, TiffTag tag, int field);
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public static TIFFSetField_d1 TIFFSetFieldInt => Load<TIFFSetField_d1>();
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public delegate int TIFFSetField_d2(IntPtr tiff, TiffTag tag, float field);
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public static TIFFSetField_d2 TIFFSetFieldFloat => Load<TIFFSetField_d2>();
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public delegate int TIFFSetField_d3(IntPtr tiff, TiffTag tag, double field);
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public static TIFFSetField_d3 TIFFSetFieldDouble => Load<TIFFSetField_d3>();
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public delegate int TIFFSetField_d4(IntPtr tiff, TiffTag tag, short field, short[] array);
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public static TIFFSetField_d4 TIFFSetFieldShortArray => Load<TIFFSetField_d4>();
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public delegate int TIFFWriteScanline_d(
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IntPtr tiff, tdata_t buf, int row, short sample);
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public static TIFFWriteScanline_d TIFFWriteScanline => Load<TIFFWriteScanline_d>();
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public delegate int TIFFReadRGBAImage_d(
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IntPtr tiff, int w, int h, IntPtr raster, int stopOnError);
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public static TIFFReadRGBAImage_d TIFFReadRGBAImage => Load<TIFFReadRGBAImage_d>();
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public delegate int TIFFReadRGBAImageOriented_d(
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IntPtr tiff, int w, int h, IntPtr raster, int orientation, int stopOnError);
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public static TIFFReadRGBAImageOriented_d TIFFReadRGBAImageOriented => Load<TIFFReadRGBAImageOriented_d>();
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[DllImport("libdl.so.2")]
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public static extern IntPtr dlopen(string filename, int flags);
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[DllImport("libdl.so.2")]
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public static extern string dlerror();
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[DllImport("libdl.so.2")]
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public static extern IntPtr dlsym(IntPtr handle, string symbol);
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} |