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(Unicode C) Update a String Property in XMPDemonstrates how to open a JPG or TIF image file, access the XMP metadata, and update the value of a string property. (If the string property does not already exist, it is created.)
#include <C_CkXmpW.h> #include <C_CkXmlW.h> void ChilkatSample(void) { HCkXmpW xmp; BOOL success; HCkXmlW xml; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. xmp = CkXmpW_Create(); // Load a JPG or TIF image file. success = CkXmpW_LoadAppFile(xmp,L"qa_data/xmp/AJ_123642_1511.tif"); if (success != TRUE) { wprintf(L"%s\n",CkXmpW_lastErrorText(xmp)); CkXmpW_Dispose(xmp); return; } wprintf(L"Num embedded XMP docs: %d\n",CkXmpW_getNumEmbedded(xmp)); // This example assumes that XMP metadata is already present in the image file. if (CkXmpW_getNumEmbedded(xmp) == 0) { wprintf(L"No XMP metadata already exists..\n"); CkXmpW_Dispose(xmp); return; } // Get the XMP metadata. xml = CkXmpW_GetEmbedded(xmp,0); // Show the XML: wprintf(L"%s\n",CkXmlW_getXml(xml)); // Update (overwrite) a string property. CkXmpW_AddSimpleStr(xmp,xml,L"NumberofTimes",L"123"); success = CkXmpW_SaveAppFile(xmp,L"qa_output/updated.tif"); if (success != TRUE) { wprintf(L"%s\n",CkXmpW_lastErrorText(xmp)); CkXmpW_Dispose(xmp); return; } wprintf(L"Success.\n"); CkXmpW_Dispose(xmp); } |
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