예제 #1
0
        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);
            }
        }