Get Layer Groups from C++ plugin

Within automation plugin we are traversing layer accessing them using index.

however to decide whether a layer is a real layer or just layer set start or stop we use following routine:

SPErr AMAutoPlugin::GetLayerSetInfo(int index, int * result)

{

    SPErr error = kSPNoError;

    char layertype[1024]="";

    char cdata1[1024]="";

    char cdata2[1024]="";

    DescriptorTypeID runtimeKeyID;

    uint32 data1;

    uint32 data2;

    error = sPSActionControl->StringIDToTypeID("layerSection", &runtimeKeyID);

    if (error) goto returnError;

    error = PIUGetInfoByIndex(index, classLayer,runtimeKeyID, &data1, &data2);

    if (error) goto returnError;

    error = sPSActionControl->TypeIDToStringID(data1,cdata1,255);

    if (error) goto returnError;

    error = sPSActionControl->TypeIDToStringID(data2,cdata2,255);

    if (error) goto returnError;

    if (strcmp(cdata1, "layerSectionStart")==0)*result=2;

    else if (strcmp(cdata1, "layerSectionEnd")==0)*result=1;

    else if (strcmp(cdata1, "layerSectionContent")==0)*result=0;

    else *result =-1;

returnError:

     return error;

}  

It is old and not to safe but i think you will get the picture.

To get layer bounds use something like (Part of the saving routine):

AUTO_ERROR AMAutoPlugin::SaveClipFromLayer(int LayerCounter, char* path_buffer, string &sErrorString )

{

    .......

    DescriptorTypeID runtimeKeyID;

    DescriptorTypeID runtimeClassID;

    DescriptorClassID descClass;

    PIActionDescriptor descLayer = NULL;

    PIActionDescriptor descPosition = NULL;

    double top= 0;

    double left= 0;

    double bottom= 0;

    double right= 0;

     AUTO_ERROR autoError =AUTO_OK;

    SPErr error =kSPNoError;

........

     error = sPSActionDescriptor->Make(&descLayer);

    if (error) goto returnAutoError;

    error = sPSActionDescriptor->Make(&descPosition);

    if (error) goto returnAutoError;

    error =SelectLayerByIndex( LayerCounter);

    if (error!=-1 && error!=0){

        autoError=ERR_SELECT_LAYER_BYINDEX;

        goto returnAutoError;

    }

     //

    // GET LAYER BOUNDS

    //

    error = PIUGetInfoByIndex(LayerCounter,classLayer,0,&descLayer,NULL);

    if (error) goto returnAutoError;

    error = sPSActionControl->StringIDToTypeID("bounds", &runtimeKeyID);

         if (error) goto returnAutoError;

    error = sPSActionControl->StringIDToTypeID("classRectangle", &runtimeClassID);

        if (error) goto returnAutoError;

    error = PIUGetSingleItemFromDescriptor(descLayer,runtimeKeyID,&descPosition,&descClass);

    if (error) goto returnAutoError;

    error = sPSActionDescriptor->GetFloat(descPosition, keyTop, &top);

    if (error) goto returnAutoError;

    error = sPSActionDescriptor->GetFloat(descPosition, keyLeft, &left);

    if (error) goto returnAutoError;

    error = sPSActionDescriptor->GetFloat(descPosition, keyBottom, &bottom);

    if (error) goto returnAutoError;

    error = sPSActionDescriptor->GetFloat(descPosition, keyRight, &right);

    if (error) goto returnAutoError;

......

returnAutoError:

     // do error handling in this case we are calling our AddErrorDescription function

     // clean something ...

    if (descLayer != NULL) sPSActionDescriptor->Free(descLayer);

    if (descPosition != NULL) sPSActionDescriptor->Free(descPosition);

    autoError=AddErrorDescription(sErrorString, autoError,LayerCounter, 2);

    return     autoError;   

...

}

Saving PNG (made from listner plugin)

SPErr AMAutoPlugin::SavePNGALPHA(char *FullPath, bool SaveAlpha)

{

     SPErr error = kSPNoError;

     PIActionDescriptor result = NULL;

     PIActionDescriptor FileDesc = NULL;

     PIActionDescriptor FileTypeDesc = NULL;    

     Handle aliasValue = NULL;

     error = sPSActionDescriptor->Make(&FileDesc);

     if (error) goto returnError;

     error = sPSActionDescriptor->Make(&FileTypeDesc);

     if (error) goto returnError;

     error = sPSActionDescriptor->PutEnumerated(FileTypeDesc, keyPNGInterlaceType, typePNGInterlaceType, enumPNGInterlaceNone);

     if (error) goto returnError;

     error = sPSActionDescriptor->PutEnumerated(FileTypeDesc, keyPNGFilter, typePNGFilter, enumPNGFilterAdaptive);

     if (error) goto returnError;

     error = sPSActionDescriptor->PutObject(FileDesc, keyAs, classPNGFormat, FileTypeDesc);

     if (error) goto returnError;

     FullPathToAlias(FullPath, aliasValue);

     error = sPSActionDescriptor->PutAlias(FileDesc, keyIn, aliasValue);

     if (error) goto returnError;

     error = sPSActionDescriptor->PutBoolean(FileDesc, keyCopy, true);

     if (error) goto returnError;

     error = sPSActionDescriptor->PutBoolean(FileDesc, keyLowerCase, true);

     if (error) goto returnError;

     error = sPSActionDescriptor->PutBoolean(FileDesc, keyAlphaChannels, SaveAlpha);

     if (error) goto returnError;

     error = sPSActionControl->Play(&result, eventSave, FileDesc, plugInDialogSilent);

     if (error) goto returnError;

returnError:

     if (result != NULL) sPSActionDescriptor->Free(result);

     if (FileDesc != NULL) sPSActionDescriptor->Free(FileDesc);

     if (FileTypeDesc != NULL) sPSActionDescriptor->Free(FileTypeDesc);

     if (aliasValue != NULL) sPSHandle->Dispose(aliasValue);

     return error;

}

Use getter plugin (its source is in SDK examples automation section) to se how PS stores info about everything in it

(ok not everything but close), it saves data in getter.log

buy the way it should be called putter because ... you will se from log file

Use listner (also automation plugin in SDK examples) to make  you a code for the command that you have

performed in PS

Hope this help.

Regards,

Momir Zecevic