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65 lines
2.9 KiB
C#
65 lines
2.9 KiB
C#
//! \file WebPCodec.cs
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//! \date Sun Apr 12 2026
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//! \brief Google WebP image format.
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//
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// Copyright (C) 2016 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.ComponentModel;
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using System.IO;
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using System.Reflection;
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using System.Runtime.InteropServices;
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namespace GameRes.Formats
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{
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public class WebPCodec
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{
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[DllImport("libwebp.dll", EntryPoint = "WebPGetInfo", CallingConvention = CallingConvention.Cdecl)]
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public static extern int WebPGetInfo ([MarshalAs(UnmanagedType.LPArray)] byte[] data, UIntPtr data_size, ref int width, ref int height);
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[DllImport("libwebp.dll", EntryPoint = "WebPDecodeBGRAInto", CallingConvention = CallingConvention.Cdecl)]
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public static extern IntPtr WebPDecodeBGRAInto ([MarshalAs(UnmanagedType.LPArray)] byte[] data, UIntPtr data_size, IntPtr output_buffer, UIntPtr output_buffer_size, int output_stride);
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[DllImport("kernel32.dll", SetLastError = true, CallingConvention = CallingConvention.StdCall)]
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static extern IntPtr LoadLibraryEx (string lpFileName, IntPtr hReservedNull, uint dwFlags);
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static bool loaded = false;
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const uint LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR = 0x00000100;
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const uint LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800;
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public static void Load ()
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{
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if (loaded)
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return;
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var dir = Path.GetDirectoryName (Assembly.GetExecutingAssembly ().Location);
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dir = Path.Combine (dir, (IntPtr.Size == 4) ? "x86" : "x64");
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var path = Path.Combine (dir, "libwebp.dll");
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path = Path.GetFullPath (path);
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var lib = LoadLibraryEx (path, IntPtr.Zero, LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR | LOAD_LIBRARY_SEARCH_SYSTEM32);
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if (IntPtr.Zero == lib)
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throw new Win32Exception (Marshal.GetLastWin32Error ());
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loaded = true;
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}
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}
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}
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