glCopyColorSubTable

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 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