public static string GetDecoderVersion()
{
uint v = (uint)LibwebpUtils.WebPGetDecoderVersion();
var revision = v % 256;
var minor = (v >> 8) % 256;
var major = (v >> 16) % 256;
return(major + "." + minor + "." + revision);
}
public Bitmap DecodeFromPointer(IntPtr data, long length)
{
int w = 0, h = 0;
//Validate header and determine size
if (LibwebpUtils.WebPGetInfo(data, (UIntPtr)length, ref w, ref h) == 0)
{
throw new Exception("Invalid WebP header detected");
}
bool success = false;
Bitmap b = null;
BitmapData bd = null;
try
{
//Allocate canvas
b = new Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
//Lock surface for writing
bd = b.LockBits(new Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
//Decode to surface
IntPtr result = LibwebpUtils.WebPDecodeBGRAInto(data, (UIntPtr)length, bd.Scan0, (UIntPtr)(bd.Stride * bd.Height), bd.Stride);
if (bd.Scan0 != result)
{
throw new Exception("Failed to decode WebP image with error " + (long)result);
}
success = true;
}
finally
{
//Unlock surface
if (bd != null && b != null)
{
b.UnlockBits(bd);
}
//Dispose of bitmap if anything went wrong
if (!success && b != null)
{
b.Dispose();
}
}
return(b);
}
