How to add a image in the DocSign example

Question

Hi,
I am struggling to add a image to the DocSign example instead of text. If somebody could give me a few hints it would be much appretiated.
I am currently modifying the CreateN2XObject function.
My situation is as follows:
I am drawing a image using the wxWidget library. From this a save the raw pixel data to a file. The pixel data is an array of unsigned chars where the first RGB triplet corresponds to the pixel first pixel of the first row, the second one to the second pixel of the first row and so on until the end of the first row; and so on...
In the CreateN2XObject I create an ASStm to read this file.
I create an attribute dictionary for this image
And then a new cos stream from the ASStm and dictionary
When I return from the function the plugin says that it is successfully signed, but I see nothing on the screen.
When I open the 'signed' document in a text editor I see:
<</Subtype/Form/Length 16038/Name/PROS/BitsPerComponent 8/Matrix[1.00011 0.0 0.0 1.00011 0.0000305176 0.0000305176]/ColorSpace/DeviceRGB/Width 54/Height 99/Type/XObject/BBox[0 76 238 0]/FormType 1>>stream
the data in the file
endstream
Below is the code I use to make the image i.e. CreateN2XObject:
     DSAPXObjEntryRec signRec;
     memset(&signRec, 0, sizeof(DSAPXObjEntryRec));
     signRec.rect = *pBBoxRec;
     signRec.bDestroy = true;
     AVDevRect rcDev = { (int)ASFixedToFloat(pBBoxRec->left), (int)ASFixedToFloat(pBBoxRec->top), (int)ASFixedToFloat(pBBoxRec->right), (int)ASFixedToFloat(pBBoxRec->bottom) };
     const char* baseDirectory = "C:/temp/data";
     ASPathName exampleFilePathName = ASPathFromPlatformPath ((char*)baseDirectory);
     ASFile theFile;
     ASInt32 retVal = ASFileSysOpenFile(NULL,exampleFilePathName, ASFILE_READ, &theFile);
     int len = 16038;
     ASStm inStm = ASFileStmRdOpen(theFile,len);
     char tmpsize[255];
     sprintf(tmpsize,"%d",len);
     AVAlertNote("tmpsize");
     AVAlertNote(tmpsize);
     //sprintf_s(buf, 125, "1 0 0 RG %i %i m %i %i l S", rcDev.left, rcDev.top, rcDev.right, rcDev.bottom);
     //ASArraySize len = strlen(buf);
     //int len = 19758;
     //ASStm inStm = ASMemStmRdOpen(buf, len);
     CosObj attrDict = CosNewDict(cosDoc, false, 1);
     CosDictPutKeyString(attrDict, "Type", CosNewNameFromString(cosDoc, false, "XObject"));
     CosDictPutKeyString(attrDict, "Subtype", CosNewNameFromString(cosDoc, false, "Image"));
     CosDictPutKeyString(attrDict, "Width", CosNewInteger(cosDoc, false, 54));
     CosDictPutKeyString(attrDict, "Height", CosNewInteger(cosDoc, false, 99));
     CosDictPutKeyString(attrDict, "ColorSpace", CosNewNameFromString(cosDoc, false, "DeviceRGB"));
     CosDictPutKeyString(attrDict, "BitsPerComponent", CosNewInteger(cosDoc, false, 8));
     CosDictPutKeyString(attrDict, "Name", CosNewNameFromString(cosDoc, false, "PROS"));
     CosDictPutKeyString(attrDict, "Length", CosNewInteger(cosDoc, false, len));
     CosObj cBBoxObj = CosNewArray(cosDoc, false, 4);
     CosArrayInsert(cBBoxObj, 0, CosNewInteger(cosDoc, false, rcDev.left));
     CosArrayInsert(cBBoxObj, 1, CosNewInteger(cosDoc, false, rcDev.top));
     CosArrayInsert(cBBoxObj, 2, CosNewInteger(cosDoc, false, rcDev.right));
     CosArrayInsert(cBBoxObj, 3, CosNewInteger(cosDoc, false, rcDev.bottom));
     CosDictPutKeyString(attrDict, "BBox", cBBoxObj);
     AVAlertNote("Creating cos stream");
     CosObj cStmObj = CosNewStream(cosDoc, true, inStm, 0, true, attrDict, CosNewNull(), len);
     AVAlertNote("Finished creating cos stream");
     ASStmClose(inStm);
     signRec.xobj = cStmObj;
     AFPDWidgetBorderRec border;
     AFPDWidgetGetBorder(PDAnnotFromCosObj(sigAnnot), &border);
     AVAlertNote("Returning DigSigAPXObjectFromXObjList");
     return DigSigAPXObjectFromXObjList(cosDoc, pBBoxRec, &signRec, 0, 0, &border, kDSMerge);
Regards,
Magda

Answer 1

Thanks!
So, even though I am spesifically telling it to create an Image type with CosDictPutKeyString(attrDict, "Subtype", CosNewNameFromString(cosDoc, false, "Image"));
I must still create a Form object around it?