Unicode C Requires Chilkat v11.7.0+

Deflate Compression Level When Optimizing a PDF

See more PDF Optimization Examples

Demonstrates compressionLevel, which is the deflate level (1 to 9, 9 by default) used for every stream the optimizer re-encodes. Level 9 is the smallest and the slowest; level 1 is the quickest. The difference is usually a percent or two, so level 9 is the right default for a file that will be downloaded many times, and a lower level is worth considering only when a server optimizes PDFs on the fly. A value outside 1 to 9 is an error. Unicode C

#include <C_CkFileAccessW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkPdfW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkFileAccessW fac;
    HCkJsonObjectW json;
    HCkJsonObjectW jsonOut;
    HCkPdfW pdf1;
    HCkPdfW pdf9;
    HCkPdfW pdfBad;

    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 watersense_accomplishments.pdf

    fac = CkFileAccessW_Create();
    json = CkJsonObjectW_Create();
    jsonOut = CkJsonObjectW_Create();

    pdf1 = CkPdfW_Create();
    success = CkPdfW_LoadFile(pdf1,L"qa_data/pdf/watersense_accomplishments.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf1));
        CkFileAccessW_Dispose(fac);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        CkPdfW_Dispose(pdf1);
        return;
    }

    CkJsonObjectW_UpdateInt(json,L"compressionLevel",1);
    success = CkPdfW_Optimize(pdf1,L"optimize",json,jsonOut);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf1));
        CkFileAccessW_Dispose(fac);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        CkPdfW_Dispose(pdf1);
        return;
    }

    success = CkPdfW_WriteFile(pdf1,L"qa_output/watersense_level1.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf1));
        CkFileAccessW_Dispose(fac);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        CkPdfW_Dispose(pdf1);
        return;
    }

    wprintf(L"level 1: %d\n",CkFileAccessW_FileSize(fac,L"qa_output/watersense_level1.pdf"));

    pdf9 = CkPdfW_Create();
    success = CkPdfW_LoadFile(pdf9,L"qa_data/pdf/watersense_accomplishments.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf9));
        CkFileAccessW_Dispose(fac);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        CkPdfW_Dispose(pdf1);
        CkPdfW_Dispose(pdf9);
        return;
    }

    CkJsonObjectW_UpdateInt(json,L"compressionLevel",9);
    success = CkPdfW_Optimize(pdf9,L"optimize",json,jsonOut);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf9));
        CkFileAccessW_Dispose(fac);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        CkPdfW_Dispose(pdf1);
        CkPdfW_Dispose(pdf9);
        return;
    }

    success = CkPdfW_WriteFile(pdf9,L"qa_output/watersense_level9.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf9));
        CkFileAccessW_Dispose(fac);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        CkPdfW_Dispose(pdf1);
        CkPdfW_Dispose(pdf9);
        return;
    }

    wprintf(L"level 9: %d\n",CkFileAccessW_FileSize(fac,L"qa_output/watersense_level9.pdf"));

    //  A level outside 1..9 fails, and LastErrorText says why.
    pdfBad = CkPdfW_Create();
    success = CkPdfW_LoadFile(pdfBad,L"qa_data/pdf/watersense_accomplishments.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdfBad));
        CkFileAccessW_Dispose(fac);
        CkJsonObjectW_Dispose(json);
        CkJsonObjectW_Dispose(jsonOut);
        CkPdfW_Dispose(pdf1);
        CkPdfW_Dispose(pdf9);
        CkPdfW_Dispose(pdfBad);
        return;
    }

    CkJsonObjectW_UpdateInt(json,L"compressionLevel",12);
    success = CkPdfW_Optimize(pdfBad,L"optimize",json,jsonOut);
    if (success == FALSE) {
        wprintf(L"compressionLevel 12 was refused, as it should be.\n");
    }



    CkFileAccessW_Dispose(fac);
    CkJsonObjectW_Dispose(json);
    CkJsonObjectW_Dispose(jsonOut);
    CkPdfW_Dispose(pdf1);
    CkPdfW_Dispose(pdf9);
    CkPdfW_Dispose(pdfBad);

    }