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Date Posted: 14:30:34 06/13/00 Tue
Author: Bob Villiers
Subject: Re: Colour Depth Conversion
In reply to: Bob Villiers 's message, "Colour Depth Conversion" on 10:01:16 06/13/00 Tue

The message has now changed. Is there a simpler (more elegant) solution than below <g>.

Bob

bmpGraphic := TBitmapGraphic.Create;
try
bmpGraphic.AssignFromDibHandle(DibHandle);
st:= TMemoryStream.Create;
try
bmpGraphic.SaveToStream(st);
bmp:= TBitmap.Create;
try
st.seek(0,0);
bmp.LoadFromStream(st);
bmp.PixelFormat:= pf4bit;
// Clear memory stream
st.Clear;
bmp.SaveToStream(st);
// Clear tempory graphic
bmpGraphic.Clear;
st.seek(0,0);
bmpGraphic.LoadFromStream(st);

Graphic := TPngGraphic.Create;
try
Graphic.Assign(bmpGraphic);
Graphic.XDotsPerInch := XDpi;
Graphic.YDotsPerInch := YDpi;
Graphic.SaveToFile(string(CallBackData));
finally
Graphic.Free;
end;
finally
bmp.Free;
end;
finally
st.Free;
end;
finally
bmpGraphic.Free;
end;
end;

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