glClear

Clear buffers to preset values.

   void glClear(GLbitfield mask)

mask: Bitwise OR of masks that indicate the buffers to be cleared. The only supported value for mask is GL_COLOR_BUFFER_BIT.

glClear sets the drawing area of the window to values previously selected by glClearColor.

The pixel ownership test and the scissor test affect the operation of glClear. The scissor box bounds the cleared region.

glClear takes a single argument that indicates which buffer to clear.

The only currently supported value of mask is:

GL_COLOR_BUFFER_BIT Indicates the buffers currently enabled for color writing.

If a buffer is not present, then a glClear directed at that buffer has no effect.

GL_INVALID_VALUE is generated if any bit other than GL_COLOR_BUFFER_BIT is set in mask.

glGet (GL_COLOR_CLEAR_VALUE)

Technical documentation