getSnapshot without displaying picture? (MMAPI - JSR 135)

[mkukec]

Is it possible to getSnapshot without displaying picture on any Canvas? I've tried many possible combinatons but allways ends up with black rectangle if i don't display image on Canvas (make video canvas current)?

Here are some parts of application. First, camera is initialized

player1 = Manager.createPlayer ("capture://video");
player1.realize ();
vc1 = (VideoControl)player1.getControl ("VideoControl");
vc1.initDisplayMode (VideoControl.USE_DIRECT_VIDEO, videoCanvas);
vc1.setDisplayFullScreen(false);
vc1.setVisible(true);

player1.start();


after that I try to capture pictures in separate Thread.

while(true) {
disp.setCurrent(videoCanvas);
capture();
disp.setCurrent(appCanvas);
appCanvas.repaint();
}

I would like to do that without

disp.setCurrent(videoCanvas);


in upper code. If I comment out this line then all I get is black rectangle..

[r2j7]

Hello mkukec,

first, you've defined with

vc1.initDisplayMode (VideoControl.USE_DIRECT_VIDEO, videoCanvas);

that you're using canvas in the first place. So leaving it out means not showing it on the display at all. More specific about this:

"java.lang.Object initDisplayMode(int mode, java.lang.Object arg)
...
When USE_DIRECT_VIDEO is specified for initDisplayMode, the arg argument must not be null and must be a javax.microedition.lcdui.Canvas or a subclass of it."

Source: http://java.sun.com/javame/reference...eoControl.html

Regards,
r2j7

[mkukec]

Thanks for answering. I've read you answer few times and then I've realized that I haven’t put question precise enough. I don't want to show picture from camera on any Form or Canvas. I don't want to show picture from camera on Display. I want to take picture (getSnapshot) without displaying what currently camera is showing, save picture in some Image and then maybe latter display it using Form or Canvas.

I don't know if that would be possible because in API documentation for getSnapshot says "Get a snapshot of the displayed content."

Is there any other way to get pixels/image from camera ther than using getSnapshot?

[mkukec]

ROTFLMAO

vc1.setDisplayLocation(-150,-150);

hehe...Works beautifully on N70