glViewport — set the viewport
| ||GLint x,|
|GLsizei height |
Specify the lower left corner of the viewport rectangle, in pixels. The initial value is (0,0).
Specify the width and height of the viewport. When a GL context is first attached to a window,
height are set to the dimensions of that window.
glViewport specifies the affine transformation of and from normalized device coordinates to window coordinates. Let be normalized device coordinates. Then the window coordinates are computed as follows:
Viewport width and height are silently clamped to a range that depends on the implementation. To query this range, call glGet with argument
GL_INVALID_VALUE is generated if either
height is negative.
|OpenGL ES API Version|
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/.