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GLVIEWPORTARRAY(3G)			  OpenGL Manual 		      GLVIEWPORTARRAY(3G)

NAME
       glViewportArray - set multiple viewports

C SPECIFICATION
       void glViewportArrayv(GLuint first, GLsizei count, const GLfloat *v);

PARAMETERS
       first
	   Specify the first viewport to set.

       count
	   Specify the number of viewports to set.

       v
	   Specify the address of an array containing the viewport parameters.

DESCRIPTION
       glViewportArrayv specifies the parameters for multiple viewports simulataneously.  first
       specifies the index of the first viewport to modify and count specifies the number of
       viewports to modify.  first must be less than the value of GL_MAX_VIEWPORTS, and first +
       count must be less than or equal to the value of GL_MAX_VIEWPORTS. Viewports whose indices
       lie outside the range [first, first + count) are not modified.  v contains the address of
       an array of floating point values specifying the left (x), bottom (y), width (w), and
       height (h) of each viewport, in that order.  x and y give the location of the viewport's
       lower left corner, and w and h give the width and height of the viewport, respectively.
       The viewport 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

       The location of the viewport's bottom left corner, given by (x, y) is clamped to be within
       the implementaiton-dependent viewport bounds range. The viewport bounds range [min, max]
       can be determined by calling glGet() with argument GL_VIEWPORT_BOUNDS_RANGE. 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.

       The precision with which the GL interprets the floating point viewport bounds is
       implementation-dependent and may be determined by querying the impementation-defined
       constant GL_VIEWPORT_SUBPIXEL_BITS.

ERRORS
       GL_INVALID_VALUE is generated if first is greater than or equal to the value of
       GL_MAX_VIEWPORTS.

       GL_INVALID_VALUE is generated if first + count is greater than or equal to the value of
       GL_MAX_VIEWPORTS.

       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

       glGet() with argument GL_VIEWPORT_BOUNDS_RANGE

       glGet() with argument GL_VIEWPORT_SUBPIXEL_BITS

SEE ALSO
       glDepthRange(), glViewport(), glViewportIndexed()

COPYRIGHT
       Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms
       and conditions set forth in the Open Publication License, v 1.0, 8 June 1999.
       http://opencontent.org/openpub/.

AUTHORS
       opengl.org

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