GLCOPYCOLORSUBTABLE

Section: Misc. Reference Manual Pages (3G)
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NAME

glCopyColorSubTable - respecify a portion of a color table

C SPECIFICATION

void glCopyColorSubTable( GLenum target,


                            GLsizei start,
                            GLint x,
                            GLint y,
                            GLsizei width )

PARAMETERS

target: Must be one of GL_COLOR_TABLE, GL_POST_CONVOLUTION_COLOR_TABLE, or GL_POST_COLOR_MATRIX_COLOR_TABLE.
start: The starting index of the portion of the color table to be replaced.
x, y: The window coordinates of the left corner of the row of pixels to be copied.
width: The number of table entries to replace.

DESCRIPTION

glCopyColorSubTable is used to respecify a contiguous portion of a color table previously defined using glColorTable. The pixels copied from the framebuffer replace the portion of the existing table from indices start to $"start"~+~"x"~-~1$, inclusive. This region may not include any entries outside the range of the color table, as was originally specified. It is not an error to specify a subtexture with width of 0, but such a specification has no effect.

NOTES

glCopyColorSubTable is present only if GL_ARB_imaging is returned when glGetString is called with an argument of GL_EXTENSIONS.

ERRORS

GL_INVALID_VALUE is generated if target is not a previously defined color table. GL_INVALID_VALUE is generated if target is not one of the allowable values. GL_INVALID_VALUE is generated if $"start"~+~"x"~>~width$. GL_INVALID_OPERATION is generated if glCopyColorSubTable is executed between the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS

glGetColorTable, glGetColorTableParameter