public static ComPtr <IDiaSymbol> GetSymbol(this IDiaSymbol symbol, SymTagEnum symTag, string name, Predicate <IDiaSymbol> filter = null)
{
ComPtr <IDiaSymbol> result = new ComPtr <IDiaSymbol>();
symbol.findChildren(symTag, name, 1, out IDiaEnumSymbols enumSymbols);
using (ComPtr.Create(enumSymbols))
{
int n = enumSymbols.count;
if (n == 0)
{
Debug.Fail("Symbol '" + name + "' was not found.");
throw new ArgumentException();
}
try
{
for (int i = 0; i < n; ++i)
{
using (ComPtr <T> item = ComPtr.Create(enumSymbols.Item((uint)i)))
{
if (filter == null || filter(item.Object))
{
if (result.Object == null)
{
result = item.Detach();
}
else
{
Debug.Fail("Found more than one symbol named '" + name + "' and matching the filter.");
throw new ArgumentException();
}
}
}
}
}
catch
{
result.Dispose();
throw;
}
}
return(result);
}
public WicImageFrame(WicImageContainer decoder, uint index)
{
Container = decoder;
using var frame = default(ComPtr <IWICBitmapFrameDecode>);
HRESULT.Check(decoder.WicDecoder->GetFrame(index, frame.GetAddressOf()));
using var source = new ComPtr <IWICBitmapSource>((IWICBitmapSource *)frame.Get());
double dpix, dpiy;
HRESULT.Check(frame.Get()->GetResolution(&dpix, &dpiy));
(DpiX, DpiY) = (dpix, dpiy);
uint frameWidth, frameHeight;
HRESULT.Check(frame.Get()->GetSize(&frameWidth, &frameHeight));
using var metareader = default(ComPtr <IWICMetadataQueryReader>);
if (SUCCEEDED(frame.Get()->GetMetadataQueryReader(metareader.GetAddressOf())))
{
string orientationPath =
MagicImageProcessor.EnableXmpOrientation ? Wic.Metadata.OrientationWindowsPolicy :
Container.ContainerFormat == FileFormat.Jpeg ? Wic.Metadata.OrientationJpeg :
Wic.Metadata.OrientationExif;
ExifOrientation = ((Orientation)metareader.GetValueOrDefault <ushort>(orientationPath)).Clamp();
WicMetadataReader = metareader.Detach();
}
using var preview = default(ComPtr <IWICBitmapSource>);
if (decoder.IsRawContainer && index == 0 && SUCCEEDED(decoder.WicDecoder->GetPreview(preview.GetAddressOf())))
{
uint pw, ph;
HRESULT.Check(preview.Get()->GetSize(&pw, &ph));
if (pw == frameWidth && ph == frameHeight)
{
source.Attach(preview.Detach());
}
}
using var transform = default(ComPtr <IWICBitmapSourceTransform>);
if (SUCCEEDED(source.Get()->QueryInterface(__uuidof <IWICBitmapSourceTransform>(), (void **)transform.GetAddressOf())))
{
uint tw = 1, th = 1;
HRESULT.Check(transform.Get()->GetClosestSize(&tw, &th));
SupportsNativeScale = tw < frameWidth || th < frameHeight;
}
using var ptransform = default(ComPtr <IWICPlanarBitmapSourceTransform>);
if (SUCCEEDED(source.Get()->QueryInterface(__uuidof <IWICPlanarBitmapSourceTransform>(), (void **)ptransform.GetAddressOf())))
{
var fmts = WicTransforms.PlanarPixelFormats;
var desc = stackalloc WICBitmapPlaneDescription[fmts.Length];
fixed(Guid *pfmt = fmts)
{
uint tw = frameWidth, th = frameHeight, st = 0;
HRESULT.Check(ptransform.Get()->DoesSupportTransform(
&tw, &th,
WICBitmapTransformOptions.WICBitmapTransformRotate0, WICPlanarOptions.WICPlanarOptionsDefault,
pfmt, desc, (uint)fmts.Length, (int *)&st
));
SupportsPlanarProcessing = st != 0;
}
ChromaSubsampling =
desc[1].Width < desc[0].Width && desc[1].Height < desc[0].Height ? WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsampling420 :
desc[1].Width < desc[0].Width ? WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsampling422 :
desc[1].Height < desc[0].Height ? WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsampling440 :
WICJpegYCrCbSubsamplingOption.WICJpegYCrCbSubsampling444;
}
var guid = default(Guid);
HRESULT.Check(source.Get()->GetPixelFormat(&guid));
if (PixelFormat.FromGuid(guid).NumericRepresentation == PixelNumericRepresentation.Indexed)
{
var newFormat = PixelFormat.Bgr24Bpp;
if (Container.ContainerFormat == FileFormat.Gif && Container.FrameCount > 1)
{
newFormat = PixelFormat.Bgra32Bpp;
}
else
{
using var pal = default(ComPtr <IWICPalette>);
HRESULT.Check(Wic.Factory->CreatePalette(pal.GetAddressOf()));
HRESULT.Check(source.Get()->CopyPalette(pal));
int bval;
if (SUCCEEDED(pal.Get()->HasAlpha(&bval)) && bval != 0)
{
newFormat = PixelFormat.Bgra32Bpp;
}
else if ((SUCCEEDED(pal.Get()->IsGrayscale(&bval)) && bval != 0) || (SUCCEEDED(pal.Get()->IsBlackWhite(&bval)) && bval != 0))
{
newFormat = PixelFormat.Grey8Bpp;
}
}
var nfmt = newFormat.FormatGuid;
using var conv = default(ComPtr <IWICFormatConverter>);
HRESULT.Check(Wic.Factory->CreateFormatConverter(conv.GetAddressOf()));
HRESULT.Check(conv.Get()->Initialize(source, &nfmt, WICBitmapDitherType.WICBitmapDitherTypeNone, null, 0.0, WICBitmapPaletteType.WICBitmapPaletteTypeCustom));
source.Attach((IWICBitmapSource *)conv.Detach());
}
WicFrame = frame.Detach();
WicSource = source.Detach();
}