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GLVIEWPORT(3G)				  OpenGL Manual 			   GLVIEWPORT(3G)

NAME
       glViewport - set the viewport

C SPECIFICATION
       void glViewport(GLint x, GLint y, GLsizei width, GLsizei height);

PARAMETERS
       x, y
	   Specify the lower left corner of the viewport rectangle, in pixels. The initial value
	   is (0,0).

       width, height
	   Specify the width and height of the viewport. When a GL context is first attached to a
	   window, width and height are set to the dimensions of that window.

DESCRIPTION
       glViewport specifies the affine transformation of x and y from normalized device
       coordinates to window coordinates. Let x nd y nd be normalized device coordinates. Then
       the window coordinates x w y w are computed as follows:

       x w = x nd + 1  width 2 + x

       y w = y nd + 1  height 2 + y

       Viewport width and height are silently clamped to a range that depends on the
       implementation. To query this range, call glGet() with argument GL_MAX_VIEWPORT_DIMS.

ERRORS
       GL_INVALID_VALUE is generated if either width or height is negative.

ASSOCIATED GETS
       glGet() with argument GL_VIEWPORT

       glGet() with argument GL_MAX_VIEWPORT_DIMS

SEE ALSO
       glDepthRange()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org				    06/10/2014				   GLVIEWPORT(3G)
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