glScissorIndexed — define the scissor box for a specific viewport
void glScissorIndexed(
|
GLuint index, |
| GLint left, | |
| GLint bottom, | |
| GLsizei width, | |
GLsizei height); |
void glScissorIndexedv(
|
GLuint index, |
const GLint *v); |
index
Specifies the index of the viewport whose scissor box to modify.
left,
bottom
Specify the coordinate of the bottom left corner of the scissor box, in pixels.
width,
height
Specify ths dimensions of the scissor box, in pixels.
v
For glScissorIndexedv, specifies the address of an array containing the left, bottom, width and height of each
scissor box, in that order.
glScissorIndexed defines the scissor box for a specified viewport.
index specifies the index of scissor box to modify.
index must be less than the value of GL_MAX_VIEWPORTS.
For glScissorIndexed, left, bottom,
width and height specify the left, bottom, width
and height of the scissor box, in pixels, respectively.
For glScissorIndexedv, v specifies the address of an
array containing integers specifying the lower left corner of the scissor box, and the width and
height of the scissor box, 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.
GL_INVALID_VALUE is generated if index 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.
| 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 |
glScissorIndexed
|
- | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ |
glScissorIndexedv
|
- | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ |
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