GLGETINTERNALFORMATI(3G)

    .SH "NAME" glGetInternalformativ - retrieve information about implementation-dependent support for internal formats
    .SH "C SPECIFICATION"

            .HP u void glGetInternalformativ(GLenum target, GLenum internalformat, GLenum pname, GLsizei bufSize, GLint *params);

    .SH "PARAMETERS"

        .PP target

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

            .RE
            .PP internalformat

                        Specifies the internal format about which to retrieve information.

                .RE
                .PP pname

                            Specifies the type of information to query.

                    .RE
                    .PP bufSize

                                Specifies the maximum number of integers that may be written to params by the function.

                        .RE
                        .PP params

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

                            .RE

                        .SH "DESCRIPTION"
                            .PP 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.
                            .PP internalformat specifies the internal format about which to retrieve information and must be a color-renderable, depth-renderable or stencil-renderable format.
                            .PP The information retrieved will be written to memory addressed by the pointer specified in params. No more than bufSize integers will be written to this memory.
                            .PP 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.
                            .PP 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:

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

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

                                •
                                                    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

                                    •
                                                        The value of GL_MAX_SAMPLES.
                                                    .RE

                                        .SH "ERRORS"
                                            .PP GL_INVALID_VALUE is generated if bufSize is negative.
                                            .PP GL_INVALID_ENUM is generated if pname is not GL_SAMPLES or GL_NUM_SAMPLE_COUNTS.
                                            .PP GL_INVALID_ENUM is generated if internalformat is not color-, depth-, or stencil-renderable.
                                            .PP GL_INVALID_ENUM is generated if target is not GL_RENDERBUFFER, GL_TEXTURE_2D_MULTISAMPLE, or GL_TEXTURE_2D_MULTISAMPLE_ARRAY.

                                        .SH "API VERSION SUPPORT"

                                            .TS allbox tab(:); l l l l l. T{ glGetInternalformativ T}:T{ T}:T{ T}:T{ T}:T{ T}

                                        .SH "SEE ALSO"
                                            .PP glGet()

                                        .SH "COPYRIGHT"
                                            .PP Copyright © 2011-2015 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 © 2011-2015 Khronos Group.