SQL Server Requires Chilkat v11.7.0+

PDF Object Streams: generate, preserve or disable

See more PDF Optimization Examples

Demonstrates the objectStreams option. An object stream packs many small objects (dictionaries, not stream data) into one compressed stream, which is usually a worthwhile saving in a document with many pages or tags. "generate" (the default) packs them and writes a cross-reference stream; "preserve" keeps the file as it is -- packed if it already was, not packed if it was not; "disable" writes every object on its own with a classic cross-reference table, which is what a PDF 1.4 reader needs. Object streams require PDF 1.5 and are skipped for PDF/A-1. SQL Server

--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @iTmp1 int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    --  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

    DECLARE @fac int
    EXEC @hr = sp_OACreate 'Chilkat.FileAccess', @fac OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    DECLARE @jsonOut int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonOut OUT

    --  generate: pack the objects (the default).
    DECLARE @pdf1 int
    EXEC @hr = sp_OACreate 'Chilkat.Pdf', @pdf1 OUT

    EXEC sp_OAMethod @pdf1, 'LoadFile', @success OUT, 'qa_data/pdf/grand_canyon_hiking_guide.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        RETURN
      END
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'objectStreams', 'generate'
    EXEC sp_OAMethod @pdf1, 'Optimize', @success OUT, 'optimize', @json, @jsonOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        RETURN
      END
    EXEC sp_OAMethod @pdf1, 'WriteFile', @success OUT, 'qa_output/grand_canyon_objstm_generate.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf1, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        RETURN
      END

    EXEC sp_OAMethod @fac, 'FileSize', @iTmp0 OUT, 'qa_output/grand_canyon_objstm_generate.pdf'

    EXEC sp_OAMethod @jsonOut, 'IntOf', @iTmp1 OUT, 'actions.objectStreams.count'
    PRINT 'generate: ' + @iTmp0 + ' bytes, objects packed: ' + @iTmp1

    --  disable: every object on its own, with a classic cross-reference table.
    DECLARE @pdf2 int
    EXEC @hr = sp_OACreate 'Chilkat.Pdf', @pdf2 OUT

    EXEC sp_OAMethod @pdf2, 'LoadFile', @success OUT, 'qa_data/pdf/grand_canyon_hiking_guide.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        RETURN
      END
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'objectStreams', 'disable'
    EXEC sp_OAMethod @pdf2, 'Optimize', @success OUT, 'optimize', @json, @jsonOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        RETURN
      END
    EXEC sp_OAMethod @pdf2, 'WriteFile', @success OUT, 'qa_output/grand_canyon_objstm_disable.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf2, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        RETURN
      END

    EXEC sp_OAMethod @fac, 'FileSize', @iTmp0 OUT, 'qa_output/grand_canyon_objstm_disable.pdf'

    PRINT 'disable:  ' + @iTmp0 + ' bytes'

    --  preserve: leave the file's own structure alone.  Use it when the output must stay readable by
    --  whatever reads the input today.
    DECLARE @pdf3 int
    EXEC @hr = sp_OACreate 'Chilkat.Pdf', @pdf3 OUT

    EXEC sp_OAMethod @pdf3, 'LoadFile', @success OUT, 'qa_data/pdf/grand_canyon_hiking_guide.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf3, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        EXEC @hr = sp_OADestroy @pdf3
        RETURN
      END
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'objectStreams', 'preserve'
    EXEC sp_OAMethod @pdf3, 'Optimize', @success OUT, 'optimize', @json, @jsonOut
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf3, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        EXEC @hr = sp_OADestroy @pdf3
        RETURN
      END
    EXEC sp_OAMethod @pdf3, 'WriteFile', @success OUT, 'qa_output/grand_canyon_objstm_preserve.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf3, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @jsonOut
        EXEC @hr = sp_OADestroy @pdf1
        EXEC @hr = sp_OADestroy @pdf2
        EXEC @hr = sp_OADestroy @pdf3
        RETURN
      END

    EXEC sp_OAMethod @fac, 'FileSize', @iTmp0 OUT, 'qa_output/grand_canyon_objstm_preserve.pdf'

    PRINT 'preserve: ' + @iTmp0 + ' bytes'

    EXEC @hr = sp_OADestroy @fac
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @jsonOut
    EXEC @hr = sp_OADestroy @pdf1
    EXEC @hr = sp_OADestroy @pdf2
    EXEC @hr = sp_OADestroy @pdf3


END
GO