glcopycolorsubtable(3)
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