Go Requires Chilkat v11.7.0+

Why a PDF Optimization Was Skipped

See more PDF Optimization Examples

Demonstrates the "skipped" array, which lists the options that were asked for but not applied, each with a reason and, where it is page-specific, the pages. An option is skipped when it is reserved for a later release (mergeFontSubsets, compactType1Fonts), when the rules of the file forbid it (objectStreams in a PDF/A-1 file), or when the content could not be parsed safely (tidyContent and coalesceContent on a page whose content stream the parser does not understand). Nothing is ever changed on a guess: an option that cannot be applied safely is skipped and reported. Go

    success := false

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  The PDF used in this example is available at grand_canyon_hiking_guide.pdf

    pdf := chilkat.NewPdf()
    success = pdf.LoadFile("qa_data/pdf/grand_canyon_hiking_guide.pdf")
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        return
    }

    //  Ask for the two options that are reserved for a later release.
    json := chilkat.NewJsonObject()
    json.UpdateBool("mergeFontSubsets",true)
    json.UpdateBool("compactType1Fonts",true)

    jsonOut := chilkat.NewJsonObject()
    success = pdf.Optimize("audit",json,jsonOut)
    if success == false {
        fmt.Println(pdf.LastErrorText())
        pdf.DisposePdf()
        json.DisposeJsonObject()
        jsonOut.DisposeJsonObject()
        return
    }

    i := 0
    numSkipped := jsonOut.SizeOfArray("skipped")
    fmt.Println("skipped: ", numSkipped)
    for i < numSkipped {
        jsonOut.SetI(i)
        fmt.Println("   ", *jsonOut.StringOf("skipped[i].option"), " - ", *jsonOut.StringOf("skipped[i].reason"))
        i = i + 1
    }

    //  A skipped option is not a failure: Optimize returns true, the other options are applied, and the
    //  report says exactly what was left undone.

    pdf.DisposePdf()
    json.DisposeJsonObject()
    jsonOut.DisposeJsonObject()