How to retrieve a view thumbnail (AcDbViewTableRecord::getThumbnail)?

[maisoui]

Hi,

I'm trying to retrieve the preview of a view using the function AcDbViewTableRecord::getThumbnail. I get a BITMAPINFO object and I'm trying to create a HBITMAP from it :

BITMAPINFO * pBitmapInfo = NULL;
if((es = pRecord->getThumbnail(pBitmapInfo)) == Acad::eOk)
{
	void * pBuffer = NULL;
	HBITMAP hBitmap;
	if((hBitmap = CreateDIBSection(NULL, pBitmapInfo, DIB_RGB_COLORS, &pBuffer, NULL, 0)) != NULL)
	{
		...
	}

	delete pBitmapInfo;
}

The problem is that the result is an image of 128x85 pixels all black.Maybe it's more a problem using Windows methods? Does anybody have an example?

Best regards,

Jonathan

[fenton.webb]

You know, it's much easier in .NET - could you consider that?

[maisoui]

Hi,

Thank you for your suggestion, but I use only C++. I've finally found a solution : it's possible to loop on bmiColors array of the BITMAPINFO to retrieve the pixels values. I use Qt Framework, and with the code below I was able to create my QImage :

QImage image(pBitmapInfo->bmiHeader.biWidth, pBitmapInfo->bmiHeader.biHeight, QImage::Format_ARGB32_Premultiplied);
for(int i=0; i<pBitmapInfo->bmiHeader.biWidth * pBitmapInfo->bmiHeader.biHeight; ++i)
{
	image.setPixel(i % pBitmapInfo->bmiHeader.biWidth, i / pBitmapInfo->bmiHeader.biWidth, qRgb(pBitmapInfo->bmiColors[i].rgbRed, pBitmapInfo->bmiColors[i].rgbGreen, pBitmapInfo->bmiColors[i].rgbBlue));
}

Maybe it's not the best solution, so I keep this topic unresolved.

Regards,

Jonathan