From 95d3642122f48439e356b781f62649553f97c7ee Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Wed, 6 Aug 2008 16:29:10 -0600
Subject: mesa: glsl: additional error checking

---
 src/mesa/shader/slang/slang_link.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/mesa/shader/slang/slang_link.c')

diff --git a/src/mesa/shader/slang/slang_link.c b/src/mesa/shader/slang/slang_link.c
index 53de4232be..8f07406ee4 100644
--- a/src/mesa/shader/slang/slang_link.c
+++ b/src/mesa/shader/slang/slang_link.c
@@ -445,6 +445,18 @@ _slang_link(GLcontext *ctx,
          _mesa_problem(ctx, "unexpected shader target in slang_link()");
    }
 
+#if FEATURE_es2_glsl
+   /* must have both a vertex and fragment program for ES2 */
+   if (!vertProg) {
+      link_error(shProg, "missing vertex shader\n");
+      return;
+   }
+   if (!fragProg) {
+      link_error(shProg, "missing fragment shader\n");
+      return;
+   }
+#endif
+
    /*
     * Make copies of the vertex/fragment programs now since we'll be
     * changing src/dst registers after merging the uniforms and varying vars.
-- 
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