NAME¶
glScissorArray - define the scissor box for multiple viewports
C SPECIFICATION¶
void
glScissorArrayv(GLuint first,
GLsizei count,
const GLint *v);
PARAMETERS¶
first
Specifies the index of the first viewport
whose scissor box to modify.
count
Specifies the number of scissor boxes to
modify.
v
Specifies the address of an array containing
the left, bottom, width and height of each scissor box, in that order.
DESCRIPTION¶
glScissorArrayv defines rectangles, called scissor boxes, in window
coordinates for each viewport.
first specifies the index of the first
scissor box to modify and
count specifies the number of scissor boxes
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.
v specifies the address
of an array containing integers specifying the lower left corner of the
scissor boxes, and the width and height of the scissor boxes, in that order.
To enable and disable the scissor test, call
glEnable() and
glDisable() with argument
GL_SCISSOR_TEST. The test is initially
disabled for all viewports. While the test is enabled, only pixels that lie
within the scissor box can be modified by drawing commands. Window coordinates
have integer values at the shared corners of frame buffer pixels.
glScissor(0,0,1,1) allows modification of only the lower left pixel in the
window, and glScissor(0,0,0,0) doesn't allow modification of any pixels in the
window.
When the scissor test is disabled, it is as though the scissor box includes the
entire window.
ERRORS¶
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 any width or height specified in the
array
v is negative.
ASSOCIATED GETS¶
glGet() with argument
GL_SCISSOR_BOX
glIsEnabled() with argument
GL_SCISSOR_TEST
SEE ALSO¶
glEnable(),
glViewport(),
glViewportIndexed(),
glViewportArray()
COPYRIGHT¶
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/.