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);
}
}
