XvGetStill
XvGetStill
NAMESYNOPSIS
ARGUMENTS
DESCRIPTION
RETURN VALUES
DIAGNOSTICS
SEE ALSO
NAME
XvGetStill − capture a single frame of video from a drawable
SYNOPSIS
#include <X11/extensions/Xvlib.h>
int
XvGetStill(Display *dpy, XvPortID
port, Drawable d, GC
gc,
int vx, int vy, unsigned int
vw, unsigned int vh,
int dx, int dy, unsigned int
dw, unsigned int dh);
ARGUMENTS
|
dpy |
Specifies the connection to the X server. | ||
|
port |
Defines the port to which the still is output. | ||
|
d |
Defines the drawable from which the still is to be captured. Pixmaps are currently not supported. | ||
|
gc |
Defines the graphical context. GC components are: subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask. | ||
|
vx,vy,vw,vh |
Define the location and size of the destination video region into which the still is to be written. vx and vy define the xand y coordinates of the upper-left corner of the video region; vwand vh define the width and height, in pixels, of the video region. | ||
|
dx,dy,dw,dh |
Define the location and size of the source drawable from which the still image is to be captured. dxand dy define the xand y coordinates of the upper-left corner of the drawable region; dwand dh define the width and height, in pixels, of the drawable region. |
DESCRIPTION
captures a single frame of video from a drawable. The position and size of the destination (video) rectangle is specified by vx, vy, vw, and vh. The position and size of the source (drawable) rectangle is specified by dx, dy, dw, and dh.
Drawable data is clipped to the bounds of the drawable, scaled to the requested video region size (or the closest size supported) and clipped to the bounds of the video encoding. The contents of any region not updated with drawable data is undefined.
If the port is grabbed by another client, this request is ignored, and an XvVideoNotify event with detail XvBusy is generated for the drawable.
RETURN VALUES
[Success]
Returned if XvGetStill(3) completed successfully.
[XvBadExtension]
Returned if the Xv extension is unavailable.
[XvBadAlloc]
Returned if XvGetStill(3) failed to allocate memory to process the request.
DIAGNOSTICS
[XvBadPort]
Generated if the requested port does not exist.
[BadDrawable]
Generated if the requested drawable does not exist.
|
[BadGC] |
Generated if the requested graphics context does not exist. |
[BadAlloc]
Generated if there were insufficient resources to process the request.
SEE ALSO
XvPutStill(3), XvGetVideo(3), XvPutVideo(3), XvVideoNotify(3)
Opportunity
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
Free Books
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Education
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.
