diff options
| -rw-r--r-- | src/mesa/tnl/t_vb_arbprogram.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/src/mesa/tnl/t_vb_arbprogram.c b/src/mesa/tnl/t_vb_arbprogram.c index 30364ceb781..14011f43db0 100644 --- a/src/mesa/tnl/t_vb_arbprogram.c +++ b/src/mesa/tnl/t_vb_arbprogram.c @@ -91,7 +91,10 @@ static GLfloat RoughApproxExp2(GLfloat t) static GLfloat RoughApproxPower(GLfloat x, GLfloat y) { - return RoughApproxExp2(y * RoughApproxLog2(x)); + if (x == 0.0 && y == 0.0) + return 1.0; /* spec requires this */ + else + return RoughApproxExp2(y * RoughApproxLog2(x)); } @@ -336,17 +339,15 @@ static void do_LIT( struct arb_vp_machine *m, union instruction op ) GLfloat tmp[4]; tmp[0] = 1.0; - tmp[1] = 0.0; - tmp[2] = 0.0; - tmp[3] = 1.0; - + tmp[1] = arg0[0]; if (arg0[0] > 0.0) { - tmp[1] = arg0[0]; - - if (arg0[1] > 0.0) { - tmp[2] = RoughApproxPower(arg0[1], arg0[3]); - } + tmp[2] = RoughApproxPower(arg0[1], arg0[3]); } + else { + tmp[2] = 0.0; + } + tmp[3] = 1.0; + COPY_4V(result, tmp); } @@ -1485,7 +1486,7 @@ const struct tnl_pipeline_stage _tnl_arb_vertex_program_stage = void _tnl_program_string(GLcontext *ctx, GLenum target, struct program *program) { - if (target == GL_VERTEX_PROGRAM_ARB) { + if (program->Target == GL_VERTEX_PROGRAM_ARB) { /* free any existing tnl data hanging off the program */ struct vertex_program *vprog = (struct vertex_program *) program; if (vprog->TnlData) { |