How to export contents of a artset as png?

[poortip87]

Hi

I want to export the contents of a artset as jpg. I am rasterizing the artset and then exporting it as JPG. But nothing happens.

Here is the code,

AIRasterizeSettings rastSettings;
AIArtHandle tempRaster = 0;
AIArtHandle layerGroup = 0;
error = sAIArtSet->IndexArtSet(artSet, 0, &layerGroup);
AIRealRect bounds;
error = sAIRasterize->ComputeArtBounds(artSet, &bounds, false);
rastSettings.type = kRasterizeRGB;
rastSettings.resolution = 72;
rastSettings.antialiasing = 2;
rastSettings.options = kRasterizeOptionsNone;
error = sAIRasterize->Rasterize(artSet, &rastSettings, &bounds, kPlaceInsideOnTop, layerGroup, &tempRaster, 0);
ai::FilePath ioFilePath(ai::UnicodeString("D:\\Samples\\TestSample\\export\\1.png"));
AIDataFilter* dstfilter = NULL;
AIDataFilter* filter = NULL;
error = sAIDataFilter->NewFileDataFilter(ioFilePath, "write", 'prw', 'PNGf', &filter);
error = sAIDataFilter->LinkDataFilter(dstfilter, filter);
dstfilter = filter;
AIImageOptPNGParams2 params;
params.versionOneSuiteParams.interlaced = true;
params.versionOneSuiteParams.transparentIndex = 0;
params.versionOneSuiteParams.resolution = 300;
params.versionOneSuiteParams.outAlpha = false;
params.antialias = 0;
params.cropBox = bounds;
params.backgroundIsTransparent = true;
error = sAIImageOpt->MakePNG24(tempRaster, dstfilter, params, NULL);

I get an exception in the last line "MakePNG24".

What am I missing?

[btempleton1982]

What's the value of error?

[poortip87]

I get 1346458189 value in error.

Can it be possible that if any value in bounds is negative, then it gives error?

[tomr11694738]

shouldnt all "versionOneSuiteParams" be filled?

params.versionOneSuiteParams.interlaced = ;

params.versionOneSuiteParams.numberOfColors = ;

params.versionOneSuiteParams.transparentIndex = ;

params.versionOneSuiteParams.resolution = ;

params.versionOneSuiteParams.outAlpha = ;

params.versionOneSuiteParams.outWidth = ;

params.versionOneSuiteParams.outHeight = ; 

params.antialias = ;

[btempleton1982]

1346458189 is 'PARM'. It looks like 'tempRaster' might not be initialized. I'm not sure if the RasterizeSuite->Rasterize(...) does that for you. Passing a null art handle in there is likely to cause problems.

[btempleton1982]

Also can't tell from that code snippet if you're initializing your ArtSet correctly. Perhaps MakePNG24(...) doesn't like being passed a NULL parameter for AIRasterizeProgressProc?

[tomr11694738]

Mr Big Templeton is absolutely right. AIRasterizeProgressProc shouldnt  be null or nil or 0 etc.

static AIBoolean progressProc(long current, long total)

{

return true;

}