glViewport — set the viewport
void glViewport( | GLint x, |
GLint y, | |
GLsizei width, | |
GLsizei height) ; |
x
, 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.
glViewport
specifies the affine transformation of
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
.
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