private bool CheckConvertion(MainForm form, IWICFormatConverterInfo info, Guid from, Guid to)
{
if (from == to)
{
return(true);
}
IWICImagingFactory factory = (IWICImagingFactory) new WICImagingFactory();
IWICPalette palette = factory.CreatePalette();
palette.InitializePredefined(WICBitmapPaletteType.WICBitmapPaletteTypeFixedBW, false);
IWICBitmap bitmap = null;
IWICFormatConverter converter = null;
try
{
try
{
converter = info.CreateInstance();
}
catch (Exception e)
{
form.Add(this, e.TargetSite.ToString(Resources._0_Failed), new DataEntry(e));
return(false);
}
try
{
bitmap = factory.CreateBitmap(1, 1, from, WICBitmapCreateCacheOption.WICBitmapCacheOnLoad);
bitmap.SetPalette(palette);
}
catch (Exception e)
{
form.Add(this, e.TargetSite.ToString(Resources._0_Failed), new DataEntry(e), new DataEntry(Resources.PixelFormat, from));
return(false);
}
try
{
converter.Initialize(bitmap, to, WICBitmapDitherType.WICBitmapDitherTypeNone, palette, 0, WICBitmapPaletteType.WICBitmapPaletteTypeCustom);
}
catch (Exception e)
{
form.CheckHRESULT(this, WinCodecError.WINCODEC_ERR_UNSUPPORTEDPIXELFORMAT, e, new DataEntry(Resources.Source, from), new DataEntry(Resources.Destination, to));
return(false);
}
return(true);
}
finally
{
palette.ReleaseComObject();
converter.ReleaseComObject();
bitmap.ReleaseComObject();
factory.ReleaseComObject();
}
}
public static IWICBitmap ToWic(IWICComponentFactory factory, Bitmap bit)
{
Guid pixelFormat = ConversionUtils.FromPixelFormat(bit.PixelFormat);
if (pixelFormat == Guid.Empty)
{
throw new NotSupportedException("PixelFormat " + bit.PixelFormat.ToString() + " not supported.");
}
BitmapData bd = bit.LockBits(new Rectangle(0, 0, bit.Width, bit.Height), ImageLockMode.ReadOnly, bit.PixelFormat);
IWICBitmap b = null;
IWICPalette p = null;
try {
//Create WIC bitmap directly from unmanaged memory
long result = CreateBitmapFromMemory(factory, (uint)bit.Width, (uint)bit.Height, ref pixelFormat, (uint)bd.Stride, (uint)(bd.Stride * bd.Height), bd.Scan0, out b);
//b = factory.CreateBitmapFromMemory((uint)bit.Width, (uint)bit.Height, ConversionUtils.FromPixelFormat(bit.PixelFormat), (uint)bd.Stride, (uint)(bd.Stride * bd.Height), bd.Scan0);
if (result == 0x80070057)
{
throw new ArgumentException();
}
if (result < 0)
{
throw new Exception("HRESULT " + result);
}
//Copy the bitmap palette if it exists
var sPalette = bit.Palette;
if (sPalette.Entries.Length > 0)
{
p = factory.CreatePalette();
uint[] colors = new uint[sPalette.Entries.Length];
for (int i = 0; i < sPalette.Entries.Length; i++)
{
colors[i] = (uint)(((sPalette.Entries[i].A << 24) | (sPalette.Entries[i].R << 16) | (sPalette.Entries[i].G << 8) | sPalette.Entries[i].B) & 0xffffffffL);
}
p.InitializeCustom(colors, (uint)colors.Length);
b.SetPalette(p);
}
return(b);
} finally {
bit.UnlockBits(bd);
if (p != null)
{
Marshal.ReleaseComObject(p);
}
}
}
