Mesa (master): glsl: Make sure shader source isn't NULL.

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: a09a8ec12d76e1fb1583fa99cf9f48246c108d7b
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a09a8ec12d76e1fb1583fa99cf9f48246c108d7b

Author: Kenneth Graunke <kenneth at whitecape.org>
Date:   Tue Sep  7 16:25:53 2010 -0700

glsl: Make sure shader source isn't NULL.

This should only occur if glCompileShader is called without a prior call
to glShaderSource.  An empty source program should be the empty string.

---

 src/mesa/program/ir_to_mesa.cpp |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 1a260c7..4f6535f 100644
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -2755,6 +2755,14 @@ _mesa_glsl_compile_shader(GLcontext *ctx, struct gl_shader *shader)
       new(shader) _mesa_glsl_parse_state(ctx, shader->Type, shader);
 
    const char *source = shader->Source;
+   /* Check if the user called glCompileShader without first calling
+    * glShaderSource.  This should fail to compile, but not raise a GL_ERROR.
+    */
+   if (source == NULL) {
+      shader->CompileStatus = GL_FALSE;
+      return;
+   }
+
    state->error = preprocess(state, &source, &state->info_log,
 			     &ctx->Extensions);