mesa: add misc tessellation shader support

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/program/program.c

@@ -365,6 +365,16 @@ _mesa_new_program(struct gl_context *ctx, GLenum target, GLuint id)
                                          CALLOC_STRUCT(gl_geometry_program),
                                          target, id);
       break;
+   case GL_TESS_CONTROL_PROGRAM_NV:
+      prog = _mesa_init_tess_ctrl_program(ctx,
+                                          CALLOC_STRUCT(gl_tess_ctrl_program),
+                                          target, id);
+      break;
+   case GL_TESS_EVALUATION_PROGRAM_NV:
+      prog = _mesa_init_tess_eval_program(ctx,
+                                         CALLOC_STRUCT(gl_tess_eval_program),
+                                         target, id);
+      break;
    case GL_COMPUTE_PROGRAM_NV:
       prog = _mesa_init_compute_program(ctx,
                                         CALLOC_STRUCT(gl_compute_program),
@@ -586,6 +596,23 @@ _mesa_clone_program(struct gl_context *ctx, const struct gl_program *prog)
          gpc->UsesStreams = gp->UsesStreams;
       }
       break;
+   case GL_TESS_CONTROL_PROGRAM_NV:
+      {
+         const struct gl_tess_ctrl_program *tcp = gl_tess_ctrl_program_const(prog);
+         struct gl_tess_ctrl_program *tcpc = gl_tess_ctrl_program(clone);
+         tcpc->VerticesOut = tcp->VerticesOut;
+      }
+      break;
+   case GL_TESS_EVALUATION_PROGRAM_NV:
+      {
+         const struct gl_tess_eval_program *tep = gl_tess_eval_program_const(prog);
+         struct gl_tess_eval_program *tepc = gl_tess_eval_program(clone);
+         tepc->PrimitiveMode = tep->PrimitiveMode;
+         tepc->Spacing = tep->Spacing;
+         tepc->VertexOrder = tep->VertexOrder;
+         tepc->PointMode = tep->PointMode;
+      }
+      break;
    default:
       _mesa_problem(NULL, "Unexpected target in _mesa_clone_program");
    }

src/mesa/program/program.h

@@ -157,6 +157,25 @@ _mesa_reference_compprog(struct gl_context *ctx,
                            (struct gl_program *) prog);
 }
 
+
+static inline void
+_mesa_reference_tesscprog(struct gl_context *ctx,
+                         struct gl_tess_ctrl_program **ptr,
+                         struct gl_tess_ctrl_program *prog)
+{
+   _mesa_reference_program(ctx, (struct gl_program **) ptr,
+                           (struct gl_program *) prog);
+}
+
+static inline void
+_mesa_reference_tesseprog(struct gl_context *ctx,
+                         struct gl_tess_eval_program **ptr,
+                         struct gl_tess_eval_program *prog)
+{
+   _mesa_reference_program(ctx, (struct gl_program **) ptr,
+                           (struct gl_program *) prog);
+}
+
 extern struct gl_program *
 _mesa_clone_program(struct gl_context *ctx, const struct gl_program *prog);
 
@@ -167,6 +186,20 @@ _mesa_clone_vertex_program(struct gl_context *ctx,
    return (struct gl_vertex_program *) _mesa_clone_program(ctx, &prog->Base);
 }
 
+static inline struct gl_tess_ctrl_program *
+_mesa_clone_tess_ctrl_program(struct gl_context *ctx,
+                             const struct gl_tess_ctrl_program *prog)
+{
+   return (struct gl_tess_ctrl_program *) _mesa_clone_program(ctx, &prog->Base);
+}
+
+static inline struct gl_tess_eval_program *
+_mesa_clone_tess_eval_program(struct gl_context *ctx,
+                             const struct gl_tess_eval_program *prog)
+{
+   return (struct gl_tess_eval_program *) _mesa_clone_program(ctx, &prog->Base);
+}
+
 static inline struct gl_geometry_program *
 _mesa_clone_geometry_program(struct gl_context *ctx,
                              const struct gl_geometry_program *prog)
@@ -262,7 +295,9 @@ _mesa_shader_stage_to_program(unsigned stage)
 }
 
 
-/* Cast wrappers from gl_program to gl_vertex/geometry/fragment_program */
+/* Cast wrappers from gl_program to derived program types.
+ * (e.g. gl_vertex_program)
+ */
 
 static inline struct gl_fragment_program *
 gl_fragment_program(struct gl_program *prog)
@@ -315,6 +350,31 @@ gl_compute_program_const(const struct gl_program *prog)
    return (const struct gl_compute_program *) prog;
 }
 
+static inline struct gl_tess_ctrl_program *
+gl_tess_ctrl_program(struct gl_program *prog)
+{
+   return (struct gl_tess_ctrl_program *) prog;
+}
+
+static inline const struct gl_tess_ctrl_program *
+gl_tess_ctrl_program_const(const struct gl_program *prog)
+{
+   return (const struct gl_tess_ctrl_program *) prog;
+}
+
+
+static inline struct gl_tess_eval_program *
+gl_tess_eval_program(struct gl_program *prog)
+{
+   return (struct gl_tess_eval_program *) prog;
+}
+
+static inline const struct gl_tess_eval_program *
+gl_tess_eval_program_const(const struct gl_program *prog)
+{
+   return (const struct gl_tess_eval_program *) prog;
+}
+
 
 #ifdef __cplusplus
 } /* extern "C" */