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GLVIEWPORT(3G) | [FIXME: manual] | GLVIEWPORT(3G) |
NAME¶
glViewport - set the viewportC SPECIFICATION¶
void glViewport(GLint x,
GLint y, GLsizei width,
GLsizei height);
PARAMETERS¶
x, ySpecify 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_DIMSVERSION 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 ALSO¶
glDepthRange()COPYRIGHT¶
Copyright © 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.08/26/2014 | [FIXME: source] |