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SaiKDot/Program.cs

Forked from bruceburge/Program.cs
Last active December 27, 2020 05:32
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Single file example of how to extract a higher resolution (256x256) png from windows file extension, note for this to compile, "allow unsafe code" flag will have to be checked [credit to : http://stackoverflow.com/a/28530403/1572750]
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Program.cs
using System;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;
namespace ExtractBase64ExtIcon
{
class Program
{
//Working example as of 2017/05/19 on windows 10 x64
//example found here.
//http://stackoverflow.com/a/28530403/1572750
public string Extract(string extension)
{
var ext = extension;
IntPtr hIcon = GetJumboIcon(GetIconIndex("*." + ext));
// from native to managed
using (Icon ico = (Icon)Icon.FromHandle(hIcon).Clone())
{
ImageConverter vert = new ImageConverter();
byte[] data = (byte[])vert.ConvertTo(ico.ToBitmap(), typeof(byte[]));
iconImage = Convert.ToBase64String(data);
}
Shell32.DestroyIcon(hIcon); // don't forget to cleanup
return iconImage;
}
static int GetIconIndex(string pszFile)
{
SHFILEINFO sfi = new SHFILEINFO();
Shell32.SHGetFileInfo(pszFile
, 0
, ref sfi
, (uint)System.Runtime.InteropServices.Marshal.SizeOf(sfi)
, (uint)(SHGFI.SysIconIndex | SHGFI.LargeIcon | SHGFI.UseFileAttributes));
return sfi.iIcon;
}
// 256*256
static IntPtr GetJumboIcon(int iImage)
{
IImageList spiml = null;
Guid guil = new Guid(IID_IImageList2);//or IID_IImageList
Shell32.SHGetImageList(Shell32.SHIL_JUMBO, ref guil, ref spiml);
IntPtr hIcon = IntPtr.Zero;
spiml.GetIcon(iImage, Shell32.ILD_TRANSPARENT | Shell32.ILD_IMAGE, ref hIcon);
return hIcon;
}
const string IID_IImageList = "46EB5926-582E-4017-9FDF-E8998DAA0950";
const string IID_IImageList2 = "192B9D83-50FC-457B-90A0-2B82A8B5DAE1";
public static class Shell32
{
public const int SHIL_LARGE = 0x0;
public const int SHIL_SMALL = 0x1;
public const int SHIL_EXTRALARGE = 0x2;
public const int SHIL_SYSSMALL = 0x3;
public const int SHIL_JUMBO = 0x4;
public const int SHIL_LAST = 0x4;
public const int ILD_TRANSPARENT = 0x00000001;
public const int ILD_IMAGE = 0x00000020;
[DllImport("shell32.dll", EntryPoint = "#727")]
public extern static int SHGetImageList(int iImageList, ref Guid riid, ref IImageList ppv);
[DllImport("user32.dll", EntryPoint = "DestroyIcon", SetLastError = true)]
public static unsafe extern int DestroyIcon(IntPtr hIcon);
[DllImport("shell32.dll")]
public static extern uint SHGetIDListFromObject([MarshalAs(UnmanagedType.IUnknown)] object iUnknown, out IntPtr ppidl);
[DllImport("Shell32.dll")]
public static extern IntPtr SHGetFileInfo(
string pszPath,
uint dwFileAttributes,
ref SHFILEINFO psfi,
uint cbFileInfo,
uint uFlags
);
}
[Flags]
enum SHGFI : uint
{
/// <summary>get icon</summary>
Icon = 0x000000100,
/// <summary>get display name</summary>
DisplayName = 0x000000200,
/// <summary>get type name</summary>
TypeName = 0x000000400,
/// <summary>get attributes</summary>
Attributes = 0x000000800,
/// <summary>get icon location</summary>
IconLocation = 0x000001000,
/// <summary>return exe type</summary>
ExeType = 0x000002000,
/// <summary>get system icon index</summary>
SysIconIndex = 0x000004000,
/// <summary>put a link overlay on icon</summary>
LinkOverlay = 0x000008000,
/// <summary>show icon in selected state</summary>
Selected = 0x000010000,
/// <summary>get only specified attributes</summary>
Attr_Specified = 0x000020000,
/// <summary>get large icon</summary>
LargeIcon = 0x000000000,
/// <summary>get small icon</summary>
SmallIcon = 0x000000001,
/// <summary>get open icon</summary>
OpenIcon = 0x000000002,
/// <summary>get shell size icon</summary>
ShellIconSize = 0x000000004,
/// <summary>pszPath is a pidl</summary>
PIDL = 0x000000008,
/// <summary>use passed dwFileAttribute</summary>
UseFileAttributes = 0x000000010,
/// <summary>apply the appropriate overlays</summary>
AddOverlays = 0x000000020,
/// <summary>Get the index of the overlay in the upper 8 bits of the iIcon</summary>
OverlayIndex = 0x000000040,
}
[StructLayout(LayoutKind.Sequential)]
public struct SHFILEINFO
{
public const int NAMESIZE = 80;
public IntPtr hIcon;
public int iIcon;
public uint dwAttributes;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
public string szDisplayName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)]
public string szTypeName;
};
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int left, top, right, bottom;
}
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
int x;
int y;
}
[StructLayout(LayoutKind.Sequential)]
public struct IMAGELISTDRAWPARAMS
{
public int cbSize;
public IntPtr himl;
public int i;
public IntPtr hdcDst;
public int x;
public int y;
public int cx;
public int cy;
public int xBitmap; // x offest from the upperleft of bitmap
public int yBitmap; // y offset from the upperleft of bitmap
public int rgbBk;
public int rgbFg;
public int fStyle;
public int dwRop;
public int fState;
public int Frame;
public int crEffect;
}
[StructLayout(LayoutKind.Sequential)]
public struct IMAGEINFO
{
public IntPtr hbmImage;
public IntPtr hbmMask;
public int Unused1;
public int Unused2;
public RECT rcImage;
}
[ComImportAttribute()]
[GuidAttribute("46EB5926-582E-4017-9FDF-E8998DAA0950")]
[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
public interface IImageList
{
[PreserveSig]
int Add(
IntPtr hbmImage,
IntPtr hbmMask,
ref int pi);
[PreserveSig]
int ReplaceIcon(
int i,
IntPtr hicon,
ref int pi);
[PreserveSig]
int SetOverlayImage(
int iImage,
int iOverlay);
[PreserveSig]
int Replace(
int i,
IntPtr hbmImage,
IntPtr hbmMask);
[PreserveSig]
int AddMasked(
IntPtr hbmImage,
int crMask,
ref int pi);
[PreserveSig]
int Draw(
ref IMAGELISTDRAWPARAMS pimldp);
[PreserveSig]
int Remove(int i);
[PreserveSig]
int GetIcon(
int i,
int flags,
ref IntPtr picon);
[PreserveSig]
int GetImageInfo(
int i,
ref IMAGEINFO pImageInfo);
[PreserveSig]
int Copy(
int iDst,
IImageList punkSrc,
int iSrc,
int uFlags);
[PreserveSig]
int Merge(
int i1,
IImageList punk2,
int i2,
int dx,
int dy,
ref Guid riid,
ref IntPtr ppv);
[PreserveSig]
int Clone(
ref Guid riid,
ref IntPtr ppv);
[PreserveSig]
int GetImageRect(
int i,
ref RECT prc);
[PreserveSig]
int GetIconSize(
ref int cx,
ref int cy);
[PreserveSig]
int SetIconSize(
int cx,
int cy);
[PreserveSig]
int GetImageCount(ref int pi);
[PreserveSig]
int SetImageCount(
int uNewCount);
[PreserveSig]
int SetBkColor(
int clrBk,
ref int pclr);
[PreserveSig]
int GetBkColor(
ref int pclr);
[PreserveSig]
int BeginDrag(
int iTrack,
int dxHotspot,
int dyHotspot);
[PreserveSig]
int EndDrag();
[PreserveSig]
int DragEnter(
IntPtr hwndLock,
int x,
int y);
[PreserveSig]
int DragLeave(
IntPtr hwndLock);
[PreserveSig]
int DragMove(
int x,
int y);
[PreserveSig]
int SetDragCursorImage(
ref IImageList punk,
int iDrag,
int dxHotspot,
int dyHotspot);
[PreserveSig]
int DragShowNolock(
int fShow);
[PreserveSig]
int GetDragImage(
ref POINT ppt,
ref POINT pptHotspot,
ref Guid riid,
ref IntPtr ppv);
[PreserveSig]
int GetItemFlags(
int i,
ref int dwFlags);
[PreserveSig]
int GetOverlayImage(
int iOverlay,
ref int piIndex);
};
}
}
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