glViewportArray — set multiple viewports
void glViewportArrayv( | GLuint first, |
GLsizei count, | |
const GLfloat *v) ; |
first
Specify the first viewport to set.
count
Specify the number of viewports to set.
v
Specify the address of an array containing the viewport parameters.
glViewportArrayv
specifies the parameters for multiple viewports
simulataneously. first
specifies the index of the first viewport
to modify and count
specifies the number of viewports to modify.
first
must be less than the value of GL_MAX_VIEWPORTS
,
and first
+ count
must be less than or equal to
the value of GL_MAX_VIEWPORTS
. Viewports whose indices lie outside
the range [first
, first
+ count
)
are not modified. v
contains the address of an array of floating
point values specifying the
left (
The location of the viewport's bottom left corner, given by
(GL_VIEWPORT_BOUNDS_RANGE
.
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
.
The precision with which the GL interprets the floating point viewport bounds is implementation-dependent
and may be determined by querying the impementation-defined constant GL_VIEWPORT_SUBPIXEL_BITS
.
GL_INVALID_VALUE
is generated if first
is greater than or equal to
the value of GL_MAX_VIEWPORTS
.
GL_INVALID_VALUE
is generated if first
+ count
is greater than or equal to the value of GL_MAX_VIEWPORTS
.
GL_INVALID_VALUE
is generated if either width
or height
is negative.
glGet with argument GL_VIEWPORT
glGet with argument GL_MAX_VIEWPORT_DIMS
glGet with argument GL_VIEWPORT_BOUNDS_RANGE
glGet with argument GL_VIEWPORT_SUBPIXEL_BITS
Copyright © 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.