Linux Manual Pages

Free Software * Books

Source Code

Free Media

Linux

XSetClipOrigin

HOME

XSetClipOrigin

NAME
SYNTAX
ARGUMENTS
DESCRIPTION
DIAGNOSTICS
SEE ALSO

NAME

XSetClipOrigin, XSetClipMask, XSetClipRectangles − GC convenience routines

SYNTAX

	int XSetClipOrigin(Display *display, GC gc, int clip_x_origin, int clip_y_origin);
	int XSetClipMask(Display *display, GC gc, Pixmap pixmap);
	int XSetClipRectangles(Display *display, GC gc, int clip_x_origin, int clip_y_origin, XRectangle rectangles[], int n, int ordering);

ARGUMENTS


	display		Specifies the connection to the X server.

clip_x_origin
clip_y_origin

Specify the x and y coordinates of the clip-mask origin.

	gc		Specifies the GC.
	n		Specifies the number of rectangles.
	ordering		Specifies the ordering relations on the rectangles. You can pass Unsorted, YSorted, YXSorted, or YXBanded.
	pixmap		Specifies the pixmap or None.

rectangles

Specifies an array of rectangles that define the clip-mask.

DESCRIPTION

The XSetClipOrigin function sets the clip origin in the specified GC. The clip-mask origin is interpreted relative to the origin of whatever destination drawable is specified in the graphics request.

XSetClipOrigin can generate BadAlloc and BadGC errors.

The XSetClipMask function sets the clip-mask in the specified GC to the specified pixmap. If the clip-mask is set to None, the pixels are are always drawn (regardless of the clip-origin).

XSetClipMask can generate BadAlloc, BadGC, BadMatch, and BadValue errors.

The XSetClipRectangles function changes the clip-mask in the specified GC to the specified list of rectangles and sets the clip origin. The output is clipped to remain contained within the rectangles. The clip-origin is interpreted relative to the origin of whatever destination drawable is specified in a graphics request. The rectangle coordinates are interpreted relative to the clip-origin. The rectangles should be nonintersecting, or the graphics results will be undefined. Note that the list of rectangles can be empty, which effectively disables output. This is the opposite of passing None as the clip-mask in XCreateGC, XChangeGC, and XSetClipMask.

If known by the client, ordering relations on the rectangles can be specified with the ordering argument. This may provide faster operation by the server. If an incorrect ordering is specified, the X server may generate a BadMatch error, but it is not required to do so. If no error is generated, the graphics results are undefined. Unsorted means the rectangles are in arbitrary order. YSorted means that the rectangles are nondecreasing in their Y origin. YXSorted additionally constrains YSorted order in that all rectangles with an equal Y origin are nondecreasing in their X origin. YXBanded additionally constrains YXSorted by requiring that, for every possible Y scanline, all rectangles that include that scanline have an identical Y origins and Y extents.

XSetClipRectangles can generate BadAlloc, BadGC, BadMatch, and BadValue errors.

DIAGNOSTICS

	BadAlloc		The server failed to allocate the requested resource or server memory.
	BadGC		A value for a GContext argument does not name a defined GContext.
	BadMatch		Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request.
	BadValue		Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument’s type is accepted. Any argument defined as a set of alternatives can generate this error.

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.