GLbitfield mask, GLenum filter);
extern void
-_swrast_Clear( GLcontext *ctx, GLbitfield mask, GLboolean all,
- GLint x, GLint y, GLint width, GLint height );
+_swrast_Clear(GLcontext *ctx, GLbitfield buffers);
extern void
_swrast_Accum(GLcontext *ctx, GLenum op, GLfloat value);