public WicEncoder(IStream stm, WicProcessingContext ctx)
{
var frame = (IWICBitmapFrameEncode)null;
if (ctx.Settings.SaveFormat == FileFormat.Jpeg)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatJpeg, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
var bag = (IPropertyBag2)null;
Encoder.CreateNewFrame(out frame, ref bag);
AddRef(frame);
AddRef(bag);
if (ctx.Settings.JpegSubsampleMode != ChromaSubsampleMode.Default)
{
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "ImageQuality"
}, new PROPBAG2 {
pstrName = "JpegYCrCbSubsampling"
} };
bag.Write(2, props, new object[] { ctx.Settings.JpegQuality / 100f, (byte)ctx.Settings.JpegSubsampleMode });
}
else
{
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "ImageQuality"
} };
bag.Write(1, props, new object[] { ctx.Settings.JpegQuality / 100f });
}
frame.Initialize(bag);
}
else if (ctx.Settings.SaveFormat == FileFormat.Gif)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatGif, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
Encoder.SetPalette(ctx.DestPalette);
Encoder.CreateNewFrame(out frame, null);
AddRef(frame);
frame.Initialize(null);
}
else if (ctx.Settings.SaveFormat == FileFormat.Bmp)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatBmp, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
var bag = (IPropertyBag2)null;
Encoder.CreateNewFrame(out frame, ref bag);
AddRef(frame);
AddRef(bag);
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "EnableV5Header32bppBGRA"
} };
bag.Write(1, props, new object[] { ctx.PixelFormat == Consts.GUID_WICPixelFormat32bppBGRA });
frame.Initialize(bag);
}
else if (ctx.Settings.SaveFormat == FileFormat.Tiff)
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatTiff, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
var bag = (IPropertyBag2)null;
Encoder.CreateNewFrame(out frame, ref bag);
AddRef(frame);
AddRef(bag);
var props = new PROPBAG2[] { new PROPBAG2 {
pstrName = "TiffCompressionMethod"
} };
bag.Write(1, props, new object[] { (byte)WICTiffCompressionOption.WICTiffCompressionNone });
frame.Initialize(bag);
}
else
{
Encoder = AddRef(Wic.CreateEncoder(Consts.GUID_ContainerFormatPng, null));
Encoder.Initialize(stm, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache);
Encoder.CreateNewFrame(out frame, null);
AddRef(frame);
frame.Initialize(null);
}
frame.SetResolution(96d, 96d);
frame.SetSize(ctx.Width, ctx.Height);
if (ctx.Settings.IndexedColor && ctx.PixelFormat == Consts.GUID_WICPixelFormat8bppIndexed)
{
frame.SetPalette(ctx.DestPalette);
}
if (ctx.Metadata?.Count > 0)
{
var metawriter = frame.GetMetadataQueryWriterNoThrow();
if (metawriter != null)
{
AddRef(metawriter);
foreach (var nv in ctx.Metadata)
{
metawriter.SetMetadataByNameNoThrow(nv.Key, nv.Value);
}
}
}
// TODO setting
//if (ctx.DestColorContext != null)
// frame.SetColorContexts(1, new IWICColorContext[] { ctx.DestColorContext });
Frame = frame;
}