-extern void GLAPIENTRY
-_mesa_Scissor( GLint x, GLint y, GLsizei width, GLsizei height );
+extern void
+_mesa_drawbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint n, const GLenum *buffers,
+ const GLbitfield *destMask);
+
+extern void
+_mesa_readbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLenum buffer, GLint bufferIndex);
+
+extern void
+_mesa_update_draw_buffers(struct gl_context *ctx);
+
+
+extern void
+_mesa_read_buffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLenum buffer, const char *caller);