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-rw-r--r--src/mesa/main/api_validate.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/src/mesa/main/api_validate.c b/src/mesa/main/api_validate.c
index 5c8955d7c8..42d1e579e0 100644
--- a/src/mesa/main/api_validate.c
+++ b/src/mesa/main/api_validate.c
@@ -87,11 +87,20 @@ check_valid_to_render(GLcontext *ctx, char *function)
return GL_FALSE;
}
- /* Always need vertex positions, unless a vertex program is in use */
- if (!ctx->VertexProgram._Current &&
- !ctx->Array.ArrayObj->Vertex.Enabled &&
+#if FEATURE_es2_glsl
+ /* For ES2, we can draw if any vertex array is enabled (and we should
+ * always have a vertex program/shader).
+ */
+ if (ctx->Array.ArrayObj->_Enabled == 0x0 || !ctx->VertexProgram._Current)
+ return GL_FALSE;
+#else
+ /* For regular OpenGL, only draw if we have vertex positions (regardless
+ * of whether or not we have a vertex program/shader).
+ */
+ if (!ctx->Array.ArrayObj->Vertex.Enabled &&
!ctx->Array.ArrayObj->VertexAttrib[0].Enabled)
return GL_FALSE;
+#endif
return GL_TRUE;
}