debian man page for glgetinternalformativ

GLGETINTERNALFORMATI(3G)					  [FIXME: manual]					  GLGETINTERNALFORMATI(3G)

NAME
       glGetInternalFormativ - retrieve information about implementation-dependent support for internal formats

C SPECIFICATION
       void glGetInternalFormativ(GLenum target, GLenum internalformat, GLenum pname, GLsizei bufSize, GLint *params);

PARAMETERS
       target
	   Indicates the usage of the internal format.	target must be GL_RENDERBUFFER, GL_TEXTURE_2D_MULTISAMPLE or
	   GL_TEXTURE_2D_MULTISAMPLE_ARRAY.

       internalformat
	   Specifies the internal format about which to retrieve information.

       pname
	   Specifies the type of information to query.

       bufSize
	   Specifies the maximum number of basic machine units that may be written to params by the function.

       params
	   Specifies the address of a variable into which to write the retrieved information.

DESCRIPTION
       glGetInternalFormativ retrieves information about implementation-dependent support for internal formats.  target indicates the target with
       which the internal format will be used and must be one of GL_RENDERBUFFER, GL_TEXTURE_2D_MULTISAMPLE, or GL_TEXTURE_2D_MULTISAMPLE_ARRAY,
       corresponding to usage as a renderbuffer, two-dimensional multisample texture or two-dimensional multisample array texture, respectively.

       internalformat specifies the internal format about which to retrieve information and must be a color-renderable, depth-renderable or
       stencil-renderable format.

       The information retrieved will be written to memory addressed by the pointer specified in params. No more than bufSize basic machine units
       will be written to this memory.

       If pname is GL_NUM_SAMPLE_COUNTS, the number of sample counts that would be returned by querying GL_SAMPLES will be returned in params.

       If pname is GL_SAMPLES, the sample counts supported for internalformat and target are written into params in descending numeric order. Only
       positive values are returned. Querying GL_SAMPLES with bufSize of one will return just the maximum supported number of samples for this
       format. The maximum value in GL_SAMPLES is guaranteed to be at least the lowest of the following:

       o   The value of GL_MAX_INTEGER_SAMPLES if internalformat is a signed or unsigned integer format..RE

	   o   The value of GL_MAX_DEPTH_TEXTURE_SAMPLES if internalformat is a depth- or stencil-renderable format and
			       target is GL_TEXTURE_2D_MULTISAMPLE, GL_TEXTURE_2D_MULTISAMPLE_ARRAY..RE

	       o   The value of GL_MAX_COLOR_TEXTURE_SAMPLES if internalformat is a color-renderable format and
				   target is GL_TEXTURE_2D_MULTISAMPLE or GL_TEXTURE_2D_MULTISAMPLE_ARRAY..RE

		   o   The value of GL_MAX_SAMPLES..RE

NOTES
       glGetInternalFormativ is available only if the GL version is 4.2 or higher.

ERRORS
       GL_INVALID_VALUE is generated if bufSize is negative.

       GL_INVALID_ENUM is generated if pname is not GL_SAMPLES or GL_NUM_SAMPLE_COUNTS.

       GL_INVALID_ENUM is generated if internalformat is not color-, depth-, or stencil-renderable.

       GL_INVALID_ENUM is generated if target is not one of GL_TEXTURE_2D_MULTISAMPLE, GL_TEXTURE_2D_MULTISAMPLE_ARRAY or GL_RENDERBUFFER.

SEE ALSO
       glGet()

COPYRIGHT
       Copyright (C) 2011 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/.

[FIXME: source] 						    05/30/2012						  GLGETINTERNALFORMATI(3G)