void (GLAPIENTRY *qglViewport)(GLint x, GLint y, GLsizei width, GLsizei height);
+void (GLAPIENTRY *qglGetPointerv)(GLenum pname, GLvoid** params);
void (GLAPIENTRY *qglReadPixels)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels);
void (GLAPIENTRY *qglStencilFunc)(GLenum func, GLint ref, GLuint mask);