Hi,

with Qt3 I have done this a lot, and now I need to convert and display 16bit gray scale.
But what ever I tried so far either gives me a uniform gray image (even if the buffer is empty) or no image at all.
I am a bit lost, maybe one of you can see what it is I am missing?
Efficiency is not an issue.
I just want to see the image.
The buffer is checked, and is valid, with a valid image (saved to file through grabbing lib). plus, I see in the debugger the contents.
I never get a black image even if the buffer is all full with '0'.
After setting the data in to the image, my QImage object returns false on isNull().
So I am quite sure my problem is format issue, not data issue.

Here is my code :
Qt Code: 
  1. QImage  convert16to8mono(unsigned short *inBuff, int sizeBytes, unsigned char *outBuff)
  2. {
  3.        //convert 16 to 8 bit
  4. 	for(int i=0; i<sizeBytes/2; i++)
  5. 		outBuff[i] = (((double)inBuff[i]) / 0xFFFF) * 255;
  6.  
  7. 	QImage qimage(1280,960,QImage::Format_Indexed8);
  8. 	qimage.setNumColors(256);
  9. 	for(int i=0; i<256; i++)
  10. 		qimage.setColor(i,qRgb(i,i,i));
  11.  
  12.  //trail 1
  13.  //qimage.loadFromData(outBuff,sizeBytes/2,0/*BMP*/); //this is raw data, so there are no format specific headers etc.
  14.     //trail 2
  15. 	memcpy(qimage.bits(),outBuff,sizeBytes/2);
  16.  
  17. 	//trail 3 :
  18.   //  for(int y=0,i=0;y<960; y++)
  19. 	//	for(int x=0; x<1280; x++,i++)
  20. 	//		qimage.setPixel(x,y,outBuff[i]);
  21.  
  22. 	return qimage;
  23. }
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P.S
the contents of outBuff is also checked, and it has plausible values.