org.jitsi.impl.neomedia.imgstreaming

Interface DesktopInteract

All Known Implementing Classes:

DesktopInteractImpl

public interface DesktopInteract

Interface to capture desktop screen.

Author:

Sebastien Vincent

Method Summary

Modifier and Type	Method and Description
BufferedImage	captureScreen() Capture the full desktop screen.
boolean	captureScreen(int display, byte[] output) Capture the full desktop screen using native grabber.
BufferedImage	captureScreen(int x, int y, int width, int height) Capture a part of the desktop screen.
boolean	captureScreen(int display, int x, int y, int width, int height, byte[] output) Capture a part of the desktop screen using native grabber.
boolean	captureScreen(int display, int x, int y, int width, int height, long buffer, int bufferLength) Capture a part of the desktop screen using native grabber.
boolean	captureScreen(int display, long buffer, int bufferLength) Capture the full desktop screen using native grabber.

Method Detail

captureScreen

boolean captureScreen(int display,
                      byte[] output)

Capture the full desktop screen using native grabber. Contrary to other captureScreen method, it only returns raw bytes and not BufferedImage. It is done in order to limit slow operation such as converting ARGB images (uint32_t) to bytes especially for big big screen. For example a 1920x1200 desktop consumes 9 MB of memory for grabbing and another 9 MB array for conversion operation.

Parameters:

display - index of display

output - output buffer to store bytes in. Be sure that output length is sufficient

Returns:

true if success, false if JNI error or output length too short

captureScreen

boolean captureScreen(int display,
                      long buffer,
                      int bufferLength)

Capture the full desktop screen using native grabber. Contrary to other captureScreen method, it only returns raw bytes and not BufferedImage. It is done in order to limit slow operation such as converting ARGB images (uint32_t) to bytes especially for big big screen. For example a 1920x1200 desktop consumes 9 MB of memory for grabbing and another 9 MB array for conversion operation.

Parameters:

display - index of display

buffer - native output buffer to store bytes in. Be sure that output length is sufficient

bufferLength - length of native buffer

Returns:

true if success, false if JNI error or output length too short

captureScreen

boolean captureScreen(int display,
                      int x,
                      int y,
                      int width,
                      int height,
                      byte[] output)

Capture a part of the desktop screen using native grabber. Contrary to other captureScreen method, it only returns raw bytes and not BufferedImage. It is done in order to limit slow operation such as converting ARGB images (uint32_t) to bytes especially for big big screen. For example a 1920x1200 desktop consumes 9 MB of memory for grabbing and another 9 MB array for conversion operation.

Parameters:

display - index of display

x - x position to start capture

y - y position to start capture

width - capture width

height - capture height

output - output buffer to store bytes in. Be sure that output length is sufficient

Returns:

true if success, false if JNI error or output length too short

captureScreen

boolean captureScreen(int display,
                      int x,
                      int y,
                      int width,
                      int height,
                      long buffer,
                      int bufferLength)

Capture a part of the desktop screen using native grabber. Contrary to other captureScreen method, it only returns raw bytes and not BufferedImage. It is done in order to limit slow operation such as converting ARGB images (uint32_t) to bytes especially for big big screen. For example a 1920x1200 desktop consumes 9 MB of memory for grabbing and another 9 MB array for conversion operation.

Parameters:

display - index of display

x - x position to start capture

y - y position to start capture

width - capture width

height - capture height

buffer - native output buffer to store bytes in. Be sure that output length is sufficient

bufferLength - length of native buffer

Returns:

true if success, false if JNI error or output length too short

captureScreen

BufferedImage captureScreen()

Capture the full desktop screen.

Returns:

BufferedImage of the desktop screen

captureScreen

BufferedImage captureScreen(int x,
                            int y,
                            int width,
                            int height)

Capture a part of the desktop screen.

Parameters:

x - x position to start capture

y - y position to start capture

width - capture width

height - capture height

Returns:

BufferedImage of a part of the desktop screen or null if Robot problem