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Core in version 4.5
Core since version 3.2
Core ARB extension ARB_texture_multisample

glGetMultisamplefv: retrieve the location of a sample

Function Definition

 void glGetMultisamplefv(GLenum pname​, GLuint index​, GLfloat *val​);
Specifies the sample parameter name. pname​ must be GL_SAMPLE_POSITION.
Specifies the index of the sample whose position to query.
Specifies the address of an array to receive the position of the sample.


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 - 1.

If the multisample mode does not have fixed sample locations, the returned values may only reflect the locations of samples within some pixels.


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.

See Also

glBindFramebuffer, glTexImage2DMultisample, glTexImage3DMultisample, glRenderbufferStorageMultisample


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.