//-------------------------------------------------------------------------------
//
// ReadScriptParameters
//
// See if we were called by the Photoshop scripting system and return the value
// in displayDialog if the user wants to see our dialog.
//
//-------------------------------------------------------------------------------
OSErr ReadScriptParameters(Boolean* displayDialog)
{
OSErr err = noErr;
PIReadDescriptor token = NULL;
DescriptorKeyID key = 0;
DescriptorTypeID type = 0;
int32 flags = 0;
DescriptorKeyIDArray array = { keyPSGamma, keyPSInvert, 0 };
double gamma;
Boolean invert;
if (displayDialog != NULL)
*displayDialog = gData->queryForParameters;
else
return errMissingParameter;
if (!*displayDialog)
{
PIDescriptorParameters* descParams = gFilterRecord->descriptorParameters;
if (descParams == NULL) return err;
ReadDescriptorProcs* readProcs = gFilterRecord->descriptorParameters->readDescriptorProcs;
if (readProcs == NULL) return err;
if (descParams->descriptor != NULL)
{
token = readProcs->openReadDescriptorProc(descParams->descriptor, array);
if (token != NULL)
{
while(readProcs->getKeyProc(token, &key, &type, &flags) && !err)
{
switch (key)
{
case keyPSGamma:
err = readProcs->getFloatProc(token, &gamma);
if (!err)
gParams->gamma = gamma;
break;
case keyPSInvert:
err = readProcs->getBooleanProc(token, &invert);
if (!err)
gParams->invert = invert != FALSE;
break;
default:
err = readErr;
break;
}
}
err = readProcs->closeReadDescriptorProc(token);
gFilterRecord->handleProcs->disposeProc(descParams->descriptor);
descParams->descriptor = NULL;
}
*displayDialog = descParams->playInfo == plugInDialogDisplay;
}
}
return err;
}
