private static ProcessImageResult processImage(PipelineContext ctx, Stream ostm)
{
var frame = (WicImageFrame)ctx.ImageContainer.GetFrame(ctx.Settings.FrameIndex);
ctx.AddFrameDisposer();
ctx.ImageFrame = frame;
ctx.Source = frame.Source;
MagicTransforms.AddGifFrameBuffer(ctx);
ctx.FinalizeSettings();
WicTransforms.AddColorProfileReader(ctx);
WicTransforms.AddNativeScaler(ctx);
WicTransforms.AddExifFlipRotator(ctx);
WicTransforms.AddCropper(ctx);
WicTransforms.AddPixelFormatConverter(ctx);
WicTransforms.AddHybridScaler(ctx);
WicTransforms.AddScaler(ctx);
WicTransforms.AddColorspaceConverter(ctx);
MagicTransforms.AddMatte(ctx);
MagicTransforms.AddPad(ctx);
WicTransforms.AddIndexedColorConverter(ctx);
using var enc = new WicImageEncoder(ctx.Settings.SaveFormat, ostm);
using var frm = new WicImageEncoderFrame(ctx, enc);
frm.WriteSource(ctx);
enc.Commit();
return(new ProcessImageResult(ctx.UsedSettings, ctx.Stats));
}
private static ProcessImageResult processImage(WicDecoder dec, WicProcessingContext ctx, Stream ostm)
{
var frm = new WicFrameReader(ctx);
WicTransforms.AddMetadataReader(ctx);
ctx.FinalizeSettings();
WicTransforms.AddNativeScaler(ctx);
WicTransforms.AddExifRotator(ctx);
WicTransforms.AddConditionalCache(ctx);
WicTransforms.AddCropper(ctx);
WicTransforms.AddPixelFormatConverter(ctx);
WicTransforms.AddScaler(ctx);
WicTransforms.AddColorspaceConverter(ctx);
MagicTransforms.AddMatte(ctx);
MagicTransforms.AddPad(ctx);
WicTransforms.AddIndexedColorConverter(ctx);
var enc = new WicEncoder(ctx, ostm.AsIStream());
enc.WriteSource(ctx);
return(new ProcessImageResult {
Settings = ctx.UsedSettings, Stats = ctx.Stats
});
}
internal ProcessingPipeline(WicProcessingContext ctx)
{
Context = ctx;
source = new Lazy <IPixelSource>(() => {
MagicTransforms.AddExternalFormatConverter(Context);
WicTransforms.AddPixelFormatConverter(Context, false);
return(Context.Source.AsIPixelSource());
});
}
#pragma warning restore 1573
internal static ProcessImageResult WriteOutput(PipelineContext ctx, Stream ostm)
{
MagicTransforms.AddExternalFormatConverter(ctx);
WicTransforms.AddIndexedColorConverter(ctx);
var enc = new WicEncoder(ctx, ostm.AsIStream());
enc.WriteSource(ctx);
return(new ProcessImageResult(ctx.UsedSettings, ctx.Stats));
}
private static ProcessImageResult executePipeline(WicProcessingContext ctx, Stream ostm)
{
MagicTransforms.AddExternalFormatConverter(ctx);
WicTransforms.AddIndexedColorConverter(ctx);
var enc = new WicEncoder(ctx, ostm.AsIStream());
enc.WriteSource(ctx);
return(new ProcessImageResult {
Settings = ctx.UsedSettings, Stats = ctx.Stats
});
}
/// <summary>Adds a new transform filter to the pipeline. Because a filter may alter dimensions or pixel format of an image, filters may not be added once the <see cref="PixelSource" /> has been retrieved.</summary>
/// <param name="transform">The <see cref="IPixelTransform" /> that implements the filter.</param>
public void AddTransform(IPixelTransform transform)
{
if (source.IsValueCreated)
{
throw new NotSupportedException("A Transform cannot be added once the Pipeline Source is materialized");
}
if (transform is IPixelTransformInternal tint)
{
tint.Init(Context);
return;
}
MagicTransforms.AddExternalFormatConverter(Context);
transform.Init(Context.Source.AsIPixelSource());
Context.Source = transform.AsPixelSource();
}
private static void buildPipeline(WicProcessingContext ctx, bool outputPlanar = true)
{
var frm = new WicFrameReader(ctx, EnablePlanarPipeline);
WicTransforms.AddMetadataReader(ctx);
ctx.FinalizeSettings();
ctx.Settings.UnsharpMask = ctx.UsedSettings.UnsharpMask;
ctx.Settings.JpegQuality = ctx.UsedSettings.JpegQuality;
ctx.Settings.JpegSubsampleMode = ctx.UsedSettings.JpegSubsampleMode;
if (ctx.DecoderFrame.SupportsPlanarPipeline)
{
bool savePlanar = outputPlanar &&
ctx.Settings.SaveFormat == FileFormat.Jpeg &&
ctx.Settings.InnerRect == ctx.Settings.OuterRect &&
ctx.SourceColorContext is null;
WicTransforms.AddExifRotator(ctx);
WicTransforms.AddPlanarCache(ctx);
MagicTransforms.AddHighQualityScaler(ctx);
MagicTransforms.AddUnsharpMask(ctx);
MagicTransforms.AddExternalFormatConverter(ctx);
ctx.SwitchPlanarSource(WicPlane.Chroma);
if (savePlanar)
{
var subsample = ctx.Settings.JpegSubsampleMode;
if (subsample == ChromaSubsampleMode.Subsample420)
{
ctx.Settings.InnerRect.Height = (int)Math.Ceiling(ctx.Settings.InnerRect.Height / 2d);
}
if (subsample == ChromaSubsampleMode.Subsample420 || subsample == ChromaSubsampleMode.Subsample422)
{
ctx.Settings.InnerRect.Width = (int)Math.Ceiling(ctx.Settings.InnerRect.Width / 2d);
}
}
MagicTransforms.AddHighQualityScaler(ctx);
MagicTransforms.AddExternalFormatConverter(ctx);
ctx.SwitchPlanarSource(WicPlane.Luma);
if (!savePlanar)
{
WicTransforms.AddPlanarConverter(ctx);
MagicTransforms.AddColorspaceConverter(ctx);
MagicTransforms.AddPad(ctx);
}
}
else
{
WicTransforms.AddNativeScaler(ctx);
WicTransforms.AddExifRotator(ctx);
WicTransforms.AddConditionalCache(ctx);
WicTransforms.AddCropper(ctx);
MagicTransforms.AddHighQualityScaler(ctx, true);
WicTransforms.AddPixelFormatConverter(ctx);
WicTransforms.AddScaler(ctx, true);
MagicTransforms.AddHighQualityScaler(ctx);
MagicTransforms.AddColorspaceConverter(ctx);
MagicTransforms.AddMatte(ctx);
MagicTransforms.AddUnsharpMask(ctx);
MagicTransforms.AddPad(ctx);
}
}
unsafe public void WriteAnimatedGif(PipelineContext ctx)
{
var cnt = ctx.ImageContainer as WicGifContainer ?? throw new NotSupportedException("Source must be a GIF");
using (var decmeta = ComHandle.Wrap(cnt.WicDecoder.GetMetadataQueryReader()))
using (var encmeta = ComHandle.Wrap(WicEncoder.GetMetadataQueryWriter()))
{
if (decmeta.ComObject.TryGetMetadataByName(Wic.Metadata.Gif.AppExtension, out var appext))
{
encmeta.ComObject.SetMetadataByName(Wic.Metadata.Gif.AppExtension, appext);
}
if (decmeta.ComObject.TryGetMetadataByName(Wic.Metadata.Gif.AppExtensionData, out var appdata))
{
encmeta.ComObject.SetMetadataByName(Wic.Metadata.Gif.AppExtensionData, appdata);
}
if (decmeta.ComObject.TryGetMetadataByName(Wic.Metadata.Gif.PixelAspectRatio, out var aspect))
{
encmeta.ComObject.SetMetadataByName(Wic.Metadata.Gif.PixelAspectRatio, aspect);
}
}
using var buffer = new FrameBufferSource(ctx.Source.Width, ctx.Source.Height, ctx.Source.Format);
var bspan = buffer.Span;
var lastSource = ctx.Source;
var wicBuffer = buffer.AsIWICBitmapSource();
var anictx = cnt.AnimationContext ??= new GifAnimationContext();
for (int i = 0; i < ctx.ImageContainer.FrameCount; i++)
{
if (i > 0)
{
ctx.Settings.FrameIndex = i;
ctx.ImageFrame.Dispose();
ctx.ImageFrame = ctx.ImageContainer.GetFrame(ctx.Settings.FrameIndex);
if (ctx.ImageFrame is WicImageFrame wicFrame)
{
ctx.Source = wicFrame.WicSource.AsPixelSource(nameof(IWICBitmapFrameDecode), true);
}
else
{
ctx.Source = ctx.ImageFrame.PixelSource.AsPixelSource();
}
MagicTransforms.AddGifFrameBuffer(ctx, false);
if (lastSource is ChainedPixelSource chain)
{
chain.ReInit(ctx.Source);
ctx.Source = chain;
}
}
fixed(byte *pbuff = bspan)
{
ctx.Source.CopyPixels(ctx.Source.Area, buffer.Stride, bspan.Length, (IntPtr)pbuff);
var curFormat = ctx.Source.Format;
var newFormat = PixelFormat.Indexed8Bpp;
bool alpha = curFormat.AlphaRepresentation != PixelAlphaRepresentation.None;
using var pal = ComHandle.Wrap(Wic.Factory.CreatePalette());
pal.ComObject.InitializeFromBitmap(wicBuffer, 256u, alpha);
ctx.WicContext.DestPalette = pal.ComObject;
using var conv = ComHandle.Wrap(Wic.Factory.CreateFormatConverter());
conv.ComObject.Initialize(wicBuffer, newFormat.FormatGuid, WICBitmapDitherType.WICBitmapDitherTypeErrorDiffusion, pal.ComObject, 10.0, WICBitmapPaletteType.WICBitmapPaletteTypeCustom);
ctx.Source = conv.ComObject.AsPixelSource($"{nameof(IWICFormatConverter)}: {curFormat.Name}->{newFormat.Name}", false);
using var frm = new WicImageEncoderFrame(ctx, this);
var srcmeta = ((WicImageFrame)ctx.ImageFrame).WicMetadataReader !;
using (var frmmeta = ComHandle.Wrap(frm.WicEncoderFrame.GetMetadataQueryWriter()))
{
var disp = srcmeta.TryGetMetadataByName(Wic.Metadata.Gif.FrameDisposal, out var fdisp) && (byte)fdisp.Value ! == (byte)GifDisposalMethod.RestoreBackground ? GifDisposalMethod.RestoreBackground : GifDisposalMethod.Undefined;
frmmeta.ComObject.SetMetadataByName(Wic.Metadata.Gif.FrameDisposal, new PropVariant((byte)disp));
if (srcmeta.TryGetMetadataByName(Wic.Metadata.Gif.FrameDelay, out var delay))
{
frmmeta.ComObject.SetMetadataByName(Wic.Metadata.Gif.FrameDelay, delay);
}
if (alpha)
{
frmmeta.ComObject.SetMetadataByName(Wic.Metadata.Gif.TransparencyFlag, new PropVariant(true));
frmmeta.ComObject.SetMetadataByName(Wic.Metadata.Gif.TransparentColorIndex, new PropVariant((byte)(pal.ComObject.GetColorCount() - 1)));
}
}
frm.WriteSource(ctx);
}
}
}
private static void buildPipeline(PipelineContext ctx, bool outputPlanar = true)
{
ctx.ImageFrame = ctx.ImageContainer.GetFrame(ctx.Settings.FrameIndex);
bool processPlanar = false;
var wicFrame = ctx.ImageFrame as WicImageFrame;
if (wicFrame != null)
{
processPlanar = EnablePlanarPipeline && wicFrame.SupportsPlanarProcessing && ctx.Settings.Interpolation.WeightingFunction.Support >= 0.5;
bool profilingPassThrough = processPlanar || (wicFrame.SupportsNativeScale && ctx.Settings.HybridScaleRatio > 1);
ctx.Source = wicFrame.WicSource.AsPixelSource(nameof(IWICBitmapFrameDecode), !profilingPassThrough);
}
else if (ctx.ImageFrame is IYccImageFrame planarFrame)
{
processPlanar = true;
outputPlanar = outputPlanar && planarFrame.IsFullRange && planarFrame.RgbYccMatrix.IsRouglyEqualTo(YccMatrix.Rec601);
ctx.PlanarContext = new PipelineContext.PlanarPipelineContext(planarFrame.PixelSource.AsPixelSource(), planarFrame.PixelSourceCb.AsPixelSource(), planarFrame.PixelSourceCr.AsPixelSource());
ctx.Source = ctx.PlanarContext.SourceY;
}
MagicTransforms.AddColorProfileReader(ctx);
ctx.FinalizeSettings();
ctx.Settings.UnsharpMask = ctx.UsedSettings.UnsharpMask;
ctx.Settings.JpegQuality = ctx.UsedSettings.JpegQuality;
ctx.Settings.JpegSubsampleMode = ctx.UsedSettings.JpegSubsampleMode;
var subsample = ctx.Settings.JpegSubsampleMode;
if (processPlanar)
{
if (wicFrame != null && !ctx.Settings.AutoCrop && ctx.Settings.HybridScaleRatio == 1)
{
var orCrop = PixelArea.FromGdiRect(ctx.Settings.Crop).DeOrient(ctx.Orientation, ctx.Source.Width, ctx.Source.Height);
if (wicFrame.ChromaSubsampling.IsSubsampledX() && ((orCrop.X & 1) != 0 || (orCrop.Width & 1) != 0))
{
processPlanar = false;
}
if (wicFrame.ChromaSubsampling.IsSubsampledY() && ((orCrop.Y & 1) != 0 || (orCrop.Height & 1) != 0))
{
processPlanar = false;
}
}
if (ctx.Settings.SaveFormat == FileFormat.Jpeg && ctx.Orientation.SwapsDimensions())
{
if (subsample.IsSubsampledX() && (ctx.Settings.InnerSize.Width & 1) != 0)
{
outputPlanar = false;
}
if (subsample.IsSubsampledY() && (ctx.Settings.InnerSize.Height & 1) != 0)
{
outputPlanar = false;
}
}
}
if (processPlanar)
{
bool savePlanar = outputPlanar &&
ctx.Settings.SaveFormat == FileFormat.Jpeg &&
ctx.Settings.OuterSize == ctx.Settings.InnerSize &&
ctx.DestColorProfile == ctx.SourceColorProfile;
if (wicFrame != null)
{
WicTransforms.AddPlanarCache(ctx);
}
MagicTransforms.AddPlanarCropper(ctx);
MagicTransforms.AddPlanarHybridScaler(ctx);
MagicTransforms.AddPlanarHighQualityScaler(ctx, savePlanar ? subsample : ChromaSubsampleMode.Subsample444);
MagicTransforms.AddUnsharpMask(ctx);
if (savePlanar)
{
MagicTransforms.AddPlanarExifFlipRotator(ctx);
MagicTransforms.AddPlanarExternalFormatConverter(ctx);
}
else
{
MagicTransforms.AddPlanarConverter(ctx);
MagicTransforms.AddColorspaceConverter(ctx);
MagicTransforms.AddExifFlipRotator(ctx);
MagicTransforms.AddPad(ctx);
}
}
else
{
WicTransforms.AddNativeScaler(ctx);
MagicTransforms.AddCropper(ctx);
MagicTransforms.AddHybridScaler(ctx);
WicTransforms.AddPixelFormatConverter(ctx);
MagicTransforms.AddHybridScaler(ctx);
MagicTransforms.AddHighQualityScaler(ctx);
MagicTransforms.AddColorspaceConverter(ctx);
MagicTransforms.AddMatte(ctx);
MagicTransforms.AddUnsharpMask(ctx);
MagicTransforms.AddExifFlipRotator(ctx);
MagicTransforms.AddPad(ctx);
}
}
