GLVIEWPORT - Online Linux Manual Page

Section : 3G
Updated : 01/20/2022
Source : [FIXME: source]
Note : [FIXME: manual]

NAMEglViewport − set the viewport

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

PARAMETERSx, 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​.

DESCRIPTIONglViewport 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​.

ERRORSGL_INVALID_VALUE is generated if either width or height is negative​.

ASSOCIATED GETSglGet() with argument GL_VIEWPORT glGet() with argument GL_MAX_VIEWPORT_DIMS

VERSION SUPPORT
OpenGL Version
Function / Feature Name 2​.0 2​.1 3​.0 3​.1 3​.2 3​.3 4​.0 4​.1 4​.2 4​.3 4​.4 4​.5
glViewport

SEE ALSOglDepthRange()

COPYRIGHTCopyright © 1991−2006 Silicon Graphics, Inc​. Copyright © 2010−2014 Khronos Group​. This document is licensed under the SGI Free Software B License​. For details, see http://oss​.sgi​.com/projects/FreeB/​.

COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc.
Copyright © 2010-2014 Khronos Group
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