public WicImageEncoder(FileFormat format, IStream stm)
{
encoder = ComHandle.Wrap(Wic.Factory.CreateEncoder(formatMap.GetValueOrDefault(format, Consts.GUID_ContainerFormatPng), null));
encoder.ComObject.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
}
public WicImageEncoderFrame(PipelineContext ctx, WicImageEncoder encoder, PixelArea area = default)
{
var fmt = ctx.Settings.SaveFormat;
var encArea = area.IsEmpty ? ctx.Source.Area : area;
var colorMode = ctx.Settings.ColorProfileMode;
var bag = default(IPropertyBag2);
encoder.WicEncoder.CreateNewFrame(out var frame, ref bag);
encoderFrame = ComHandle.Wrap(frame);
using (var cbag = ComHandle.Wrap(bag))
{
if (fmt == FileFormat.Jpeg)
{
bag.Write("ImageQuality", ctx.Settings.JpegQuality / 100f);
}
if (fmt == FileFormat.Jpeg && ctx.Settings.JpegSubsampleMode != ChromaSubsampleMode.Default)
{
bag.Write("JpegYCrCbSubsampling", (byte)ctx.Settings.JpegSubsampleMode);
}
if (fmt == FileFormat.Tiff)
{
bag.Write("TiffCompressionMethod", (byte)WICTiffCompressionOption.WICTiffCompressionNone);
}
if (fmt == FileFormat.Bmp && ctx.Source.Format.AlphaRepresentation != PixelAlphaRepresentation.None)
{
bag.Write("EnableV5Header32bppBGRA", true);
}
frame.Initialize(bag);
}
frame.SetSize((uint)encArea.Width, (uint)encArea.Height);
frame.SetResolution(ctx.Settings.DpiX > 0d ? ctx.Settings.DpiX : ctx.ImageFrame.DpiX, ctx.Settings.DpiY > 0d ? ctx.Settings.DpiY : ctx.ImageFrame.DpiY);
bool copySourceMetadata = ctx.ImageFrame is WicImageFrame srcFrame && srcFrame.WicMetadataReader is not null && ctx.Settings.MetadataNames != Enumerable.Empty <string>();
bool writeOrientation = ctx.Settings.OrientationMode == OrientationMode.Preserve && ctx.ImageFrame.ExifOrientation != Orientation.Normal;
bool writeColorContext = colorMode == ColorProfileMode.NormalizeAndEmbed || colorMode == ColorProfileMode.Preserve || (colorMode == ColorProfileMode.Normalize && ctx.DestColorProfile != ColorProfile.sRGB && ctx.DestColorProfile != ColorProfile.sGrey);
if ((copySourceMetadata || writeOrientation) && frame.TryGetMetadataQueryWriter(out var metawriter))
{
using var cmeta = ComHandle.Wrap(metawriter);
if (copySourceMetadata)
{
var wicFrame = (WicImageFrame)ctx.ImageFrame;
foreach (string prop in ctx.Settings.MetadataNames)
{
if (wicFrame.WicMetadataReader !.TryGetMetadataByName(prop, out var pvar) && pvar.Value is not null)
{
metawriter.TrySetMetadataByName(prop, pvar);
}
}
}
if (writeOrientation)
{
string orientationPath = ctx.Settings.SaveFormat == FileFormat.Jpeg ? Wic.Metadata.OrientationJpeg : Wic.Metadata.OrientationExif;
metawriter.TrySetMetadataByName(orientationPath, new PropVariant((ushort)ctx.ImageFrame.ExifOrientation));
}
}
if (writeColorContext)
{
Debug.Assert(ctx.WicContext.DestColorContext is not null || ctx.DestColorProfile is not null);
var cc = ctx.WicContext.DestColorContext;
if (ctx.DestColorProfile == ColorProfile.sRGB)
{
cc = WicColorProfile.SrgbCompact.Value.WicColorContext;
}
else if (ctx.DestColorProfile == ColorProfile.sGrey)
{
cc = WicColorProfile.GreyCompact.Value.WicColorContext;
}
else if (ctx.DestColorProfile == ColorProfile.AdobeRgb)
{
cc = WicColorProfile.AdobeRgb.Value.WicColorContext;
}
else if (ctx.DestColorProfile == ColorProfile.DisplayP3)
{
cc = WicColorProfile.DisplayP3Compact.Value.WicColorContext;
}
frame.TrySetColorContexts(cc ?? ctx.WicContext.AddRef(WicColorProfile.CreateContextFromProfile(ctx.DestColorProfile !.ProfileBytes)));
}
}
