glGetMultisamplefv.3G - Man Page
retrieve the location of a sample
C Specification
void glGetMultisamplefv(GLenum pname, GLuint index, GLfloat *val);
Parameters
- pname
Specifies the sample parameter name. pname must be GL_SAMPLE_POSITION.
- index
Specifies the index of the sample whose position to query.
- val
Specifies the address of an array to receive the position of the sample.
Description
glGetMultisamplefv queries the location of a given sample. pname specifies the sample parameter to retrieve and must be GL_SAMPLE_POSITION. index corresponds to the sample for which the location should be returned. The sample location is returned as two floating-point values in val[0] and val[1], each between 0 and 1, corresponding to the x and y locations respectively in the GL pixel space of that sample. (0.5, 0.5) this corresponds to the pixel center. index must be between zero and the value of GL_SAMPLES minus one.
If the multisample mode does not have fixed sample locations, the returned values may only reflect the locations of samples within some pixels.
Errors
GL_INVALID_ENUM is generated if pname is not one GL_SAMPLE_POSITION.
GL_INVALID_VALUE is generated if index is greater than or equal to the value of GL_SAMPLES.
Version Support
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 |
glGetMultisamplefv | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
See Also
Copyright
Copyright © 2010-2014 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/.
Copyright
Copyright © 2010-2014 Khronos Group