public WicImageFrame(WicImageContainer decoder, uint index)
{
if (index >= (uint)decoder.FrameCount)
{
throw new IndexOutOfRangeException("Frame index does not exist");
}
WicFrame = comHandles.AddRef(decoder.WicDecoder.GetFrame(index));
WicSource = WicFrame;
WicFrame.GetSize(out uint frameWidth, out uint frameHeight);
container = decoder;
if (decoder.IsRawContainer && index == 0 && decoder.WicDecoder.TryGetPreview(out var preview))
{
using var pvwSource = new ComHandle <IWICBitmapSource>(preview);
preview.GetSize(out uint pw, out uint ph);
if (pw == frameWidth && ph == frameHeight)
{
WicSource = comHandles.AddOwnRef(preview);
}
}
WicFrame.GetResolution(out double dpix, out double dpiy);
DpiX = dpix;
DpiY = dpiy;
if (PixelFormat.FromGuid(WicSource.GetPixelFormat()).NumericRepresentation == PixelNumericRepresentation.Indexed)
{
var pal = comHandles.AddRef(Wic.Factory.CreatePalette());
WicSource.CopyPalette(pal);
var newFormat = Consts.GUID_WICPixelFormat24bppBGR;
if (pal.HasAlpha())
{
newFormat = Consts.GUID_WICPixelFormat32bppBGRA;
}
else if (pal.IsGrayscale() || pal.IsBlackWhite())
{
newFormat = Consts.GUID_WICPixelFormat8bppGray;
}
var conv = comHandles.AddRef(Wic.Factory.CreateFormatConverter());
conv.Initialize(WicSource, newFormat, WICBitmapDitherType.WICBitmapDitherTypeNone, null, 0.0, WICBitmapPaletteType.WICBitmapPaletteTypeCustom);
WicSource = conv;
}
if (WicSource is IWICBitmapSourceTransform trans)
{
uint pw = 1, ph = 1;
trans.GetClosestSize(ref pw, ref ph);
SupportsNativeScale = pw < frameWidth || ph < frameHeight;
SupportsNativeTransform = trans.DoesSupportTransform(WICBitmapTransformOptions.WICBitmapTransformRotate270);
}
if (WicSource is IWICPlanarBitmapSourceTransform ptrans)
{
var desc = ArrayPool <WICBitmapPlaneDescription> .Shared.Rent(WicTransforms.PlanarPixelFormats.Length);
SupportsPlanarProcessing = ptrans.DoesSupportTransform(ref frameWidth, ref frameHeight, WICBitmapTransformOptions.WICBitmapTransformRotate0, WICPlanarOptions.WICPlanarOptionsDefault, WicTransforms.PlanarPixelFormats, desc, (uint)WicTransforms.PlanarPixelFormats.Length);
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;
ArrayPool <WICBitmapPlaneDescription> .Shared.Return(desc);
}
if (WicFrame.TryGetMetadataQueryReader(out var metareader))
{
WicMetadataReader = comHandles.AddRef(metareader);
string orientationPath =
MagicImageProcessor.EnableXmpOrientation ? Wic.Metadata.OrientationWindowsPolicy :
decoder.ContainerFormat == FileFormat.Jpeg ? Wic.Metadata.OrientationJpegPath :
Wic.Metadata.OrientationExifPath;
if (metareader.TryGetMetadataByName(orientationPath, out var pvorient) && pvorient.UnmanagedType == VarEnum.VT_UI2)
{
ExifOrientation = (Orientation)Math.Min(Math.Max((ushort)Orientation.Normal, (ushort)pvorient.Value !), (ushort)Orientation.Rotate270);
}
}
}
public WicImageFrame(WicImageContainer decoder, uint index)
{
WicFrame = comHandles.AddRef(decoder.WicDecoder.GetFrame(index));
WicSource = WicFrame;
Container = decoder;
WicFrame.GetResolution(out double dpix, out double dpiy);
DpiX = dpix;
DpiY = dpiy;
WicFrame.GetSize(out uint frameWidth, out uint frameHeight);
if (WicFrame.TryGetMetadataQueryReader(out var metareader))
{
WicMetadataReader = comHandles.AddRef(metareader);
string orientationPath =
MagicImageProcessor.EnableXmpOrientation ? Wic.Metadata.OrientationWindowsPolicy :
Container.ContainerFormat == FileFormat.Jpeg ? Wic.Metadata.OrientationJpeg :
Wic.Metadata.OrientationExif;
ExifOrientation = ((Orientation)metareader.GetValueOrDefault <ushort>(orientationPath)).Clamp();
}
if (decoder.IsRawContainer && index == 0 && decoder.WicDecoder.TryGetPreview(out var preview))
{
using var pvwSource = ComHandle.Wrap(preview);
preview.GetSize(out uint pw, out uint ph);
if (pw == frameWidth && ph == frameHeight)
{
WicSource = comHandles.AddOwnRef(preview);
}
}
if (WicSource is IWICBitmapSourceTransform trans)
{
uint pw = 1, ph = 1;
trans.GetClosestSize(ref pw, ref ph);
SupportsNativeScale = pw < frameWidth || ph < frameHeight;
}
if (WicSource is IWICPlanarBitmapSourceTransform ptrans)
{
var desc = ArrayPool <WICBitmapPlaneDescription> .Shared.Rent(WicTransforms.PlanarPixelFormats.Length);
uint twidth = frameWidth, theight = frameHeight;
SupportsPlanarProcessing = ptrans.DoesSupportTransform(
ref twidth, ref theight,
WICBitmapTransformOptions.WICBitmapTransformRotate0, WICPlanarOptions.WICPlanarOptionsDefault,
WicTransforms.PlanarPixelFormats, desc, (uint)WicTransforms.PlanarPixelFormats.Length
);
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;
ArrayPool <WICBitmapPlaneDescription> .Shared.Return(desc);
}
if (PixelFormat.FromGuid(WicSource.GetPixelFormat()).NumericRepresentation == PixelNumericRepresentation.Indexed)
{
var newFormat = PixelFormat.Bgr24Bpp;
if (Container.ContainerFormat == FileFormat.Gif && Container.FrameCount > 1)
{
newFormat = PixelFormat.Bgra32Bpp;
}
else
{
using var wicpal = ComHandle.Wrap(Wic.Factory.CreatePalette());
var pal = wicpal.ComObject;
WicSource.CopyPalette(pal);
if (pal.HasAlpha())
{
newFormat = PixelFormat.Bgra32Bpp;
}
else if (pal.IsGrayscale() || pal.IsBlackWhite())
{
newFormat = PixelFormat.Grey8Bpp;
}
}
var conv = comHandles.AddRef(Wic.Factory.CreateFormatConverter());
conv.Initialize(WicSource, newFormat.FormatGuid, WICBitmapDitherType.WICBitmapDitherTypeNone, null, 0.0, WICBitmapPaletteType.WICBitmapPaletteTypeCustom);
WicSource = conv;
}
}