+void set_uniform_vec2_array(GLuint glsl_program_num, const string &prefix, const string &key, const float *values, size_t num_values)
+{
+ GLint location = get_uniform_location(glsl_program_num, prefix, key);
+ if (location == -1) {
+ return;
+ }
+ check_error();
+ glUniform2fv(location, num_values, values);
+ check_error();
+}
+