extern void GLAPIENTRY
_mesa_NamedFramebufferDrawBuffer(GLuint framebuffer, GLenum buf);
-extern void
-_mesa_draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb,
- GLsizei n, const GLenum *buffers, const char *caller);
-
extern void GLAPIENTRY
_mesa_DrawBuffers(GLsizei n, const GLenum *buffers);