mesa: move fixed function vertex program builder from tnl to core mesa

Also unify caching of fragment and vertex programs in shader/prog_cache.c`

Brought across from gallium-0.2

1 files changed, 66 insertions, 32 deletions

diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index d60b9a13d8b..3323887cb02 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -62,6 +62,7 @@
 #if FEATURE_EXT_framebuffer_object
 #include "fbobject.h"
 #endif
+#include "ffvertex_prog.h"
 #include "framebuffer.h"
 #include "hint.h"
 #include "histogram.h"
@@ -951,13 +952,12 @@ update_arrays( GLcontext *ctx )
 }
 
 
-/**
- * Update derived vertex/fragment program state.
- */
 static void
 update_program(GLcontext *ctx)
 {
    const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
+   const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;
+   const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current;
 
    /* These _Enabled flags indicate if the program is enabled AND valid. */
    ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled
@@ -969,13 +969,18 @@ update_program(GLcontext *ctx)
 
    /*
     * Set the ctx->VertexProgram._Current and ctx->FragmentProgram._Current
-    * pointers to the programs that should be enabled/used.
+    * pointers to the programs that should be enabled/used.  These will only
+    * be NULL if we need to use the fixed-function code.
     *
     * These programs may come from several sources.  The priority is as
     * follows:
     *   1. OpenGL 2.0/ARB vertex/fragment shaders
     *   2. ARB/NV vertex/fragment programs
     *   3. Programs derived from fixed-function state.
+    *
+    * Note: it's possible for a vertex shader to get used with a fragment
+    * program (and vice versa) here, but in practice that shouldn't ever
+    * come up, or matter.
     */
 
    _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
@@ -991,23 +996,6 @@ update_program(GLcontext *ctx)
                                shProg->FragmentProgram);
    }
    else {
-      if (ctx->VertexProgram._Enabled) {
-         /* use user-defined vertex program */
-         _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
-                                  ctx->VertexProgram.Current);
-      }
-      else if (ctx->VertexProgram._MaintainTnlProgram) {
-         /* Use vertex program generated from fixed-function state.
-          * The _Current pointer will get set in
-          * _tnl_UpdateFixedFunctionProgram() later if appropriate.
-          */
-         _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);
-      }
-      else {
-         /* no vertex program */
-         _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);
-      }
-
       if (ctx->FragmentProgram._Enabled) {
          /* use user-defined vertex program */
          _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
@@ -1015,15 +1003,38 @@ update_program(GLcontext *ctx)
       }
       else if (ctx->FragmentProgram._MaintainTexEnvProgram) {
          /* Use fragment program generated from fixed-function state.
-          * The _Current pointer will get set in _mesa_UpdateTexEnvProgram()
-          * later if appropriate.
           */
-         _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
+         _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
+                                  _mesa_get_fixed_func_fragment_program(ctx));
+         _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram,
+                                  ctx->FragmentProgram._Current);
       }
       else {
          /* no fragment program */
          _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
       }
+
+      /* Examine vertex program after fragment program as
+       * _mesa_get_fixed_func_vertex_program() needs to know active
+       * fragprog inputs.
+       */
+      if (ctx->VertexProgram._Enabled) {
+         /* use user-defined vertex program */
+         _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
+                                  ctx->VertexProgram.Current);
+      }
+      else if (ctx->VertexProgram._MaintainTnlProgram) {
+         /* Use vertex program generated from fixed-function state.
+          */
+         _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
+                                  _mesa_get_fixed_func_vertex_program(ctx));
+         _mesa_reference_vertprog(ctx, &ctx->VertexProgram._TnlProgram,
+                                  ctx->VertexProgram._Current);
+      }
+      else {
+         /* no vertex program */
+         _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);
+      }
    }
 
    if (ctx->VertexProgram._Current)
@@ -1032,12 +1043,28 @@ update_program(GLcontext *ctx)
       assert(ctx->FragmentProgram._Current->Base.Parameters);
 
 
+   /* XXX: get rid of _Active flag.
+    */
+#if 1
    ctx->FragmentProgram._Active = ctx->FragmentProgram._Enabled;
    if (ctx->FragmentProgram._MaintainTexEnvProgram &&
        !ctx->FragmentProgram._Enabled) {
       if (ctx->FragmentProgram._UseTexEnvProgram)
 	 ctx->FragmentProgram._Active = GL_TRUE;
    }
+#endif
+
+   /* Let the driver know what's happening:
+    */
+   if (ctx->FragmentProgram._Current != prevFP && ctx->Driver.BindProgram) {
+      ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
+                              (struct gl_program *) ctx->FragmentProgram._Current);
+   }
+   
+   if (ctx->VertexProgram._Current != prevVP && ctx->Driver.BindProgram) {
+      ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
+                              (struct gl_program *) ctx->VertexProgram._Current);
+   }
 }
 
 
@@ -1197,13 +1224,11 @@ void
 _mesa_update_state_locked( GLcontext *ctx )
 {
    GLbitfield new_state = ctx->NewState;
+   GLbitfield prog_flags = _NEW_PROGRAM;
 
    if (MESA_VERBOSE & VERBOSE_STATE)
       _mesa_print_state("_mesa_update_state", new_state);
 
-   if (new_state & _NEW_PROGRAM)
-      update_program( ctx );
-
    if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
       _mesa_update_modelview_project( ctx, new_state );
 
@@ -1249,11 +1274,6 @@ _mesa_update_state_locked( GLcontext *ctx )
       update_tricaps( ctx, new_state );
 #endif
 
-   if (ctx->FragmentProgram._MaintainTexEnvProgram) {
-      if (new_state & (_NEW_TEXTURE | _DD_NEW_SEPARATE_SPECULAR | _NEW_FOG))
-	 _mesa_UpdateTexEnvProgram(ctx);
-   }
-
    /* ctx->_NeedEyeCoords is now up to date.
     *
     * If the truth value of this variable has changed, update for the
@@ -1266,6 +1286,20 @@ _mesa_update_state_locked( GLcontext *ctx )
    if (new_state & _MESA_NEW_NEED_EYE_COORDS) 
       _mesa_update_tnl_spaces( ctx, new_state );
 
+   if (ctx->FragmentProgram._MaintainTexEnvProgram) {
+      prog_flags |= (_NEW_TEXTURE | _NEW_FOG | _DD_NEW_SEPARATE_SPECULAR);
+   }
+   if (ctx->VertexProgram._MaintainTnlProgram) {
+      prog_flags |= (_NEW_ARRAY | _NEW_TEXTURE | _NEW_TEXTURE_MATRIX |
+                     _NEW_TRANSFORM | _NEW_POINT |
+                     _NEW_FOG | _NEW_LIGHT |
+                     _MESA_NEW_NEED_EYE_COORDS);
+   }
+   if (new_state & prog_flags)
+      update_program( ctx );
+
+
+
    /*
     * Give the driver a chance to act upon the new_state flags.
     * The driver might plug in different span functions, for example.