Xojo Plugin 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. Xojo Plugin

Dim success As Boolean
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

Dim pdf As New Chilkat.Pdf
success = pdf.LoadFile("qa_data/pdf/grand_canyon_hiking_guide.pdf")
If (success = False) Then
    System.DebugLog(pdf.LastErrorText)
    Return
End If

//  Ask for the two options that are reserved for a later release.
Dim json As New Chilkat.JsonObject
success = json.UpdateBool("mergeFontSubsets",True)
success = json.UpdateBool("compactType1Fonts",True)

Dim jsonOut As New Chilkat.JsonObject
success = pdf.Optimize("audit",json,jsonOut)
If (success = False) Then
    System.DebugLog(pdf.LastErrorText)
    Return
End If

Dim i As Int32
i = 0
Dim numSkipped As Int32
numSkipped = jsonOut.SizeOfArray("skipped")
System.DebugLog("skipped: " + Str(numSkipped))
While i < numSkipped
    jsonOut.I = i
    System.DebugLog("   " + jsonOut.StringOf("skipped[i].option") + " - " + jsonOut.StringOf("skipped[i].reason"))
    i = i + 1
Wend

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