XwdXwd Xwd In the X Window System, the program xwd (X Window dump) captures the content of a screen or of a window and optionally saves it into a file. codice_1 runs in one of two ways: if a user specifies the whole screen or the name or identifier of a window as an argument, the program captures the content of the window; otherwise, it changes the shape of the cursor and waits for the user to click in a window, whose content is then captured. Operation. At the X Window core protocol level, xwd uses the fact that any X  client can request the content of an arbitrary window, including ones it did not create, using the codice_2 request (this is done by the codice_3 function in the Xlib library). The content of the whole screen is obtained by requesting the content of the root window. The file generated by xwd can then be read by various other X utilities such as "xwud", "sxwd", xv, and the GIMP, or converted to other formats; the netpbm suite allows the construction of a useful pipeline: The dumps are larger in size than files in most image file formats – not only compressed formats  such as PNG, but also uncompressed bitmap formats like BMP. Image format. Various image viewers and tools support the X11 codice_4 format, among others the GIMP, ImageMagick, Netpbm, and XnView. In version 2.1.4 FFmpeg supported pixel formats "bgra, rgba, argb, abgr, rgb24, bgr24, rgb565be, rgb565le, bgr565be, bgr565le, rgb555be, rgb555le, bgr555be, bgr555le, rgb8, bgr8, rgb4_byte, bgr4_byte, pal8, gray," and "monow." In these abbreviations "555" means 32768=32×32×32 colors, "565" means 65536 colors (6 bits for green), "rgba" is red-green-blue-alpha, "4" or "8" stands for 16 or 256 colors, "le" or "be" is the endianness, "pal" is an input palette , etc. as listed by codice_5. Details of the codice_4 format in codice_7 depend on the platform, therefore it is unsuited for cross-platform applications and has no MIME image type. Xwd In the X Window System, the program xwd (X Window dump) captures the content of a screen or of a window and optionally saves it into a file. codice_1 runs in one of two ways: if a user specifies the whole screen or the name or identifier of a window as an argument, the program captures the content of the window; otherwise, it changes the shape of the cursor