Jpg to Stream ,and Stream to Bmp ... Fail ? why

image1(link to a jpg)

i use image1.picture.bitmap.writetostream(m);

an use image2.picture.bitmap.loadfromstream(m);

but fail why?




~3homer~
Thanx,very much.

[andyho]

Writing the JPEG into the stream fails because the JPEG is not available as bitmap (bitmap is only available if the image contains a BMP), but as graphic:

image1.picture.graphic.savetostream()

Loading a bmp from stream is only working in your code if there is already something in bitmap - but if you have a JPEG inside that image before it will fail. Then you have to do like this:

var
h: TBitmap;
begin
h:=NIL;
try
h:=TBitmap.Create;
h.loadfromstream(m);
image1.picture.graphic.assign(h);
finally
h.free;
end;
end;


Bye,
Andy

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