*/
sample_count_error = _mesa_check_sample_count(ctx, GL_RENDERBUFFER,
internalFormat, samples);
+
+ /* Section 2.5 (GL Errors) of OpenGL 3.0 specification, page 16:
+ *
+ * "If a negative number is provided where an argument of type sizei or
+ * sizeiptr is specified, the error INVALID VALUE is generated."
+ */
+ if (samples < 0) {
+ sample_count_error = GL_INVALID_VALUE;
+ }
+
if (sample_count_error != GL_NO_ERROR) {
_mesa_error(ctx, sample_count_error, "%s(samples)", func);
return;