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@vmware.com>

diff --git a/src/mesa/main/ffvertex_prog.c b/src/mesa/main/ffvertex_prog.c
index efdca015e99c7407a3c5d2a2cf08ba9dfa58359c..4cdec216696245c4a33dca000e19bbf30c975910 100644 (file)
--- 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;