1GLVIEWPORT(3G)                  [FIXME: manual]                 GLVIEWPORT(3G)
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NAME

6       glViewport - set the viewport
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C SPECIFICATION

9       void glViewport(GLint x, GLint y, GLsizei width, GLsizei height);
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PARAMETERS

12       x, y
13           Specify the lower left corner of the viewport rectangle, in pixels.
14           The initial value is (0,0).
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16       width, height
17           Specify the width and height of the viewport. When a GL context is
18           first attached to a window, width and height are set to the
19           dimensions of that window.
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DESCRIPTION

22       glViewport specifies the affine transformation of x and y from
23       normalized device coordinates to window coordinates. Let x nd y nd be
24       normalized device coordinates. Then the window coordinates x w y w are
25       computed as follows:
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27       x w = x nd + 1 ⁢ width 2 + x
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29       y w = y nd + 1 ⁢ height 2 + y
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31       Viewport width and height are silently clamped to a range that depends
32       on the implementation. To query this range, call glGet() with argument
33       GL_MAX_VIEWPORT_DIMS.
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ERRORS

36       GL_INVALID_VALUE is generated if either width or height is negative.
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ASSOCIATED GETS

39       glGet() with argument GL_VIEWPORT
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41       glGet() with argument GL_MAX_VIEWPORT_DIMS
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VERSION SUPPORT

44       ┌───────────┬───────────────────────────────────────────────────────────────────────┐
45       │           │                OpenGL Version                                         │
46       ├───────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
47       │Function   │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
48       │/          │     │     │     │     │     │     │     │     │     │     │     │     │
49       │Feature    │     │     │     │     │     │     │     │     │     │     │     │     │
50       │Name       │     │     │     │     │     │     │     │     │     │     │     │     │
51       ├───────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
52       │glViewport │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
53       └───────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
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SEE ALSO

56       glDepthRange()
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59       Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014
60       Khronos Group. This document is licensed under the SGI Free Software B
61       License. For details, see http://oss.sgi.com/projects/FreeB/.
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64       Copyright © 1991-2006 Silicon Graphics, Inc.
65       Copyright © 2010-2014 Khronos Group
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69[FIXME: source]                   03/06/2019                    GLVIEWPORT(3G)
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