问不作为文档的iText7图像质量优化器

EN

        LicenseKey.LoadLicenseFile("license-key-path.xml");

        PdfOptimizer optimizer = new PdfOptimizer();

        /* Here we instantiate a FileReportBuilder which we can use as a log of the efficacy of
            our optimization.  Security level configuration possible.                          */

        FileReportPublisher publisher = new FileReportPublisher(new FileInfo("report.txt"));
        FileReportBuilder builder = new FileReportBuilder(SeverityLevel.INFO, publisher);
        optimizer.SetReportBuilder(builder);

        optimizer.AddOptimizationHandler(new FontDuplicationOptimizer());
        optimizer.AddOptimizationHandler(new FontSubsettingOptimizer());

        /* Scales down and compresses Image objects. In this case, we scale and compress a
             Tiff image by 50% */
        ImageQualityOptimizer tiff_optimizer = new ImageQualityOptimizer();
        tiff_optimizer.SetTiffProcessor(new BitmapCompressor(.05f, .05f));
        optimizer.AddOptimizationHandler(new ImageQualityOptimizer());
        optimizer.AddOptimizationHandler(new CompressionOptimizer());

        ColorSpaceConverter RGB_to_CMYK_Converter = new ColorSpaceConverter();
        CsConverterProperties csConversionProperties = new CsConverterProperties(ColorConversionMode.NORMAL);
        RGB_to_CMYK_Converter.SetCsConverter(new RgbToCmykCsConverter(csConversionProperties));
        optimizer.AddOptimizationHandler(RGB_to_CMYK_Converter);

        // Document is optimized according to defined handlers and written out to file.
        optimizer.Optimize(
                new FileInfo(@"D:\sample-input\ImageQuality_Optimization_Input.pdf"),
                new FileInfo(@"D:\sample-input\ImageQuality_Optimization_Input_OPT.pdf"));

[INFO] PdfOptimizer/FontDuplicationOptimizer: No font duplication found
[INFO] PdfOptimizer/FontSubsettingOptimizer: Glyphs in document were found successfully.
[INFO] PdfOptimizer/ColorSpaceConverter: Color space of the content stream with reference 5 0 R was converted.
[INFO] PdfOptimizer/ColorSpaceConverter: Color space of the content stream resources was converted.