void (*Uniform)(GLcontext *ctx, GLint location, GLsizei count,
const GLvoid *values, GLenum type);
void (*UniformMatrix)(GLcontext *ctx, GLint cols, GLint rows,
void (*Uniform)(GLcontext *ctx, GLint location, GLsizei count,
const GLvoid *values, GLenum type);
void (*UniformMatrix)(GLcontext *ctx, GLint cols, GLint rows,