Mesa (master): mesa: assert that key->fragprog_inputs_read value isn' t too large

[Brian Paul]

Module: Mesa
Branch: master
Commit: 0d61f879a1f2e6bb37368731a29d5267e1c25195
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0d61f879a1f2e6bb37368731a29d5267e1c25195

Author: Brian Paul <brianp at vmware.com>
Date:   Sun Nov  4 16:43:44 2012 -0700

mesa: assert that key->fragprog_inputs_read value isn't too large

fragprog_inputs_read is a 12-bit bitfield so check the assigned value.
MSVC warns on the assignment.  Not easy to fix but let's do a sanity check.

Reviewed-by: Jose Fonseca <jfonseca at vmware.com>

---

 src/mesa/main/ffvertex_prog.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c
index efdca01..4cdec21 100644
--- a/src/mesa/main/ffvertex_prog.c
+++ b/src/mesa/main/ffvertex_prog.c
@@ -160,6 +160,8 @@ static void make_state_key( struct gl_context *ctx, struct state_key *key )
 
    key->need_eye_coords = ctx->_NeedEyeCoords;
 
+   /* Make sure fp->Base.InputsRead fits in a 12-bit field */
+   assert(fp->Base.InputsRead < (1 << 12));
    key->fragprog_inputs_read = fp->Base.InputsRead;
    key->varying_vp_inputs = ctx->varying_vp_inputs;