extern void
-_swrast_read_rgba_span( GLcontext *ctx, struct gl_renderbuffer *rb,
- GLuint n, GLint x, GLint y, GLchan rgba[][4] );
+_swrast_read_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ GLuint n, GLint x, GLint y, GLenum type, GLvoid *rgba);
extern void
_swrast_read_index_span( GLcontext *ctx, struct gl_renderbuffer *rb,