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.
GL_INVALID_VALUE is generated if either width or height is negative.
| 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 | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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