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
});
}
private void loadInfo(WicDecoder dec, WicProcessingContext ctx)
{
ContainerType = ctx.Decoder.ContainerFormat;
Frames = new FrameInfo[ctx.Decoder.FrameCount];
for (int i = 0; i < ctx.Decoder.FrameCount; i++)
{
ctx.Settings.FrameIndex = i;
var frm = new WicFrameReader(ctx);
WicTransforms.AddMetadataReader(ctx, basicOnly: true);
int width = (int)(frm.ExifOrientation.RequiresDimensionSwap() ? ctx.Source.Height : ctx.Source.Width);
int height = (int)(frm.ExifOrientation.RequiresDimensionSwap() ? ctx.Source.Width : ctx.Source.Height);
Frames[i] = new FrameInfo(width, height, ctx.Source.Format.AlphaRepresentation != PixelAlphaRepresentation.None, frm.ExifOrientation);
}
}
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);
}
}
