/// <summary>
/// Loads an image (of any format, including PNG or JPEG) from a file path.
/// </summary>
/// <param name="path">
/// The path to the image to load.
/// </param>
/// <returns>
/// A <see cref="Bitmap"/> instance that must be properly disposed to avoid leaking memory.
/// </returns>
public static Bitmap LoadImageFromFile(string path)
{
if (RuntimeInformation.FrameworkDescription.Contains(".NET Native"))
{
throw new PlatformNotSupportedException();
}
NativeMethods.IWICImagingFactory factory = (NativeMethods.IWICImagingFactory) new NativeMethods.WICImagingFactory();
NativeMethods.IWICBitmapDecoder decoder = factory.CreateBitmapFromFilename(path, desiredAccess: 0, options: NativeMethods.WICDecodeOptions.WICDecodeMetadataCacheOnDemand);
decoder.GetFrame(0, out NativeMethods.IWICBitmapFrameDecode frame);
return(LoadImageFromBitmapSource((NativeMethods.IWICBitmapSource)frame));
}
/// <summary>
/// Loads an image (of any format, including PNG or JPEG) that is embedded in a DLL.
/// </summary>
/// <param name="loader">
/// A <see cref="ResourceLoader"/> instance used to load the resource.
/// </param>
/// <param name="resourceTypeName">
/// The name of the resource type (for example, <c>IMAGE</c>).
/// </param>
/// <param name="resourceName">
/// The name (as used in the RC file) of the resource to load.
/// </param>
/// <returns>
/// A <see cref="Bitmap"/> instance that must be properly disposed to avoid leaking memory.
/// </returns>
public static Bitmap LoadImageFromResource(ResourceLoader loader, string resourceTypeName, string resourceName)
{
IntPtr hResInfo;
using (HGlobal namePtr = HGlobal.WithStringUni(resourceName))
{
hResInfo = NativeMethods.FindResourceW(loader.ModuleHandle, resourceTypeName, namePtr.Handle);
}
IntPtr hResData = NativeMethods.LoadResource(loader.ModuleHandle, hResInfo);
IntPtr data = NativeMethods.LockResource(hResData);
int size = NativeMethods.SizeofResource(loader.ModuleHandle, hResData);
if (RuntimeInformation.FrameworkDescription.Contains(".NET Native"))
{
throw new PlatformNotSupportedException();
}
else
{
byte[] buffer = new byte[size];
Marshal.Copy(data, buffer, 0, size);
IntPtr hMem = Marshal.AllocHGlobal(size);
Marshal.Copy(buffer, 0, hMem, size);
NativeMethods.IStream stream = null;
try
{
int hr = NativeMethods.CreateStreamOnHGlobal(hMem, true, out stream);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
NativeMethods.IWICImagingFactory factory = (NativeMethods.IWICImagingFactory) new NativeMethods.WICImagingFactory();
NativeMethods.IWICBitmapDecoder decoder = factory.CreateDecoderFromStream(stream, options: NativeMethods.WICDecodeOptions.WICDecodeMetadataCacheOnDemand);
decoder.GetFrame(0, out NativeMethods.IWICBitmapFrameDecode frame);
return(LoadImageFromBitmapSource((NativeMethods.IWICBitmapSource)frame));
}
finally
{
if (stream != null)
{
Marshal.ReleaseComObject(stream);
}
}
}
}
