/*===========================================================================*/
void NULLSetColor( GLcontext *ctx, GLubyte r, GLubyte g, GLubyte b, GLubyte a );
void NULLClearColor( GLcontext *ctx, GLubyte r, GLubyte g, GLubyte b, GLubyte a );
-GLboolean NULLSetBuffer( GLcontext *ctx, GLenum mode );
+GLboolean NULLSetBuffer( GLcontext *ctx, GLframebuffer *buffer, GLuint bit );
void NULLGetBufferSize( GLcontext *ctx, GLuint *width, GLuint *height );
GLbitfield NULLClearBuffers( GLcontext *ctx, GLbitfield m, GLboolean a, GLint x, GLint y, GLint w, GLint h );
void NULLWrSpRGB( const GLcontext* ctx, GLuint n, GLint x, GLint y, const GLubyte r[][3], const GLubyte m[] );