restore normal length optimization in dlists

8 files changed, 97 insertions, 13 deletions

diff --git a/src/mesa/tnl/t_context.c b/src/mesa/tnl/t_context.c
index e842bd1422..0acb9f9db2 100644
--- a/src/mesa/tnl/t_context.c
+++ b/src/mesa/tnl/t_context.c
@@ -1,4 +1,4 @@
-/* $Id: t_context.c,v 1.19 2001/06/04 16:09:28 keithw Exp $ */
+/* $Id: t_context.c,v 1.20 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -104,6 +104,7 @@ _tnl_CreateContext( GLcontext *ctx )
 
    tnl->NeedProjCoords = GL_TRUE;
    tnl->LoopbackDListCassettes = GL_FALSE;
+   tnl->CalcDListNormalLengths = GL_TRUE;
 
    /* Hook our functions into exec and compile dispatch tables.
     */
@@ -222,3 +223,12 @@ _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean mode )
       tnl->LoopbackDListCassettes = mode;
    }
 }
+
+void
+_tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean mode )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   if (tnl->CalcDListNormalLengths != mode) {
+      tnl->CalcDListNormalLengths = mode;
+   }
+}
diff --git a/src/mesa/tnl/t_context.h b/src/mesa/tnl/t_context.h
index 226b877d85..a7ecb346b7 100644
--- a/src/mesa/tnl/t_context.h
+++ b/src/mesa/tnl/t_context.h
@@ -1,4 +1,4 @@
-/* $Id: t_context.h,v 1.28 2001/06/04 16:09:28 keithw Exp $ */
+/* $Id: t_context.h,v 1.29 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -207,6 +207,7 @@ struct immediate
    GLfloat Color[IMM_SIZE][4];
    GLfloat Obj[IMM_SIZE][4];
    GLfloat Normal[IMM_SIZE][3];
+   GLfloat *NormalLengthPtr;
    GLfloat TexCoord0[IMM_SIZE][4];  /* just VERT_TEX0 */
    GLuint  Elt[IMM_SIZE];
    GLubyte EdgeFlag[IMM_SIZE];
@@ -256,6 +257,7 @@ typedef struct vertex_buffer
    GLubyte     ClipOrMask;	                /* VERT_CLIP (3) */
    GLubyte     *ClipMask;		        /* VERT_CLIP (4) */
    GLvector3f  *NormalPtr;	                /* VERT_NORM */
+   GLfloat     *NormalLengthPtr;	        /* VERT_NORM */
    GLboolean   *EdgeFlag;	                /* VERT_EDGE */
    GLvector4f  *TexCoordPtr[MAX_TEXTURE_UNITS];	/* VERT_TEX_0..n */
    GLvector1ui *IndexPtr[2];	                /* VERT_INDEX */
@@ -525,6 +527,7 @@ typedef struct {
     */
    GLboolean NeedProjCoords;
    GLboolean LoopbackDListCassettes;
+   GLboolean CalcDListNormalLengths;
 
    /* Derived state and storage for _tnl_eval_vb:
     */
diff --git a/src/mesa/tnl/t_imm_alloc.c b/src/mesa/tnl/t_imm_alloc.c
index 22bdb7a7bb..5cf0d1ea14 100644
--- a/src/mesa/tnl/t_imm_alloc.c
+++ b/src/mesa/tnl/t_imm_alloc.c
@@ -1,4 +1,4 @@
-/* $Id: t_imm_alloc.c,v 1.8 2001/05/09 13:53:36 keithw Exp $ */
+/* $Id: t_imm_alloc.c,v 1.9 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -57,6 +57,7 @@ static struct immediate *real_alloc_immediate( GLcontext *ctx )
    IM->MaterialMask = 0;
    IM->MaxTextureUnits = ctx->Const.MaxTextureUnits;
    IM->TexSize = 0;
+   IM->NormalLengthPtr = 0;
 
    IM->CopyTexSize = 0;
    IM->CopyStart = IM->Start;
@@ -96,6 +97,8 @@ static void real_free_immediate( struct immediate *IM )
    for (j = 1; j < IM->MaxTextureUnits; j++)
       ALIGN_FREE( IM->TexCoord[j] );
 
+   if (IM->NormalLengthPtr)
+      ALIGN_FREE( IM->NormalLengthPtr );
 
    ALIGN_FREE( IM );
    freed++;
diff --git a/src/mesa/tnl/t_imm_dlist.c b/src/mesa/tnl/t_imm_dlist.c
index 722d67b143..9c22ed3e7b 100644
--- a/src/mesa/tnl/t_imm_dlist.c
+++ b/src/mesa/tnl/t_imm_dlist.c
@@ -1,4 +1,4 @@
-/* $Id: t_imm_dlist.c,v 1.20 2001/06/04 16:09:28 keithw Exp $ */
+/* $Id: t_imm_dlist.c,v 1.21 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -66,6 +66,55 @@ static void execute_compiled_cassette( GLcontext *ctx, void *data );
 static void loopback_compiled_cassette( GLcontext *ctx, struct immediate *IM );
 
 
+static void build_normal_lengths( struct immediate *IM )
+{
+   GLuint i;
+   GLfloat len;
+   GLfloat (*data)[3] = IM->Normal + IM->Start;
+   GLfloat *dest = IM->NormalLengthPtr;
+   GLuint *flags = IM->Flag + IM->Start;
+   GLuint count = IM->Count - IM->Start;
+
+   if (!dest) {
+      dest = IM->NormalLengthPtr = ALIGN_MALLOC( IMM_SIZE*sizeof(GLfloat), 32 );
+      if (!dest) return;
+   }
+   dest += IM->Start;
+
+   len = (GLfloat) LEN_3FV( data[0] );
+   if (len > 0.0) len = 1.0/len;
+   
+   for (i = 0 ; i < count ; ) {
+      dest[i] = len;
+      if (flags[++i] & VERT_NORM) {
+	 len = (GLfloat) LEN_3FV( data[i] );
+	 if (len > 0.0) len = 1.0/len;
+      }
+   } 
+}
+
+static void fixup_normal_lengths( struct immediate *IM ) 
+{
+   GLuint i;
+   GLfloat len;
+   GLfloat (*data)[3] = IM->Normal;
+   GLfloat *dest = IM->NormalLengthPtr;
+   GLuint *flags = IM->Flag;
+
+   for (i = IM->CopyStart ; i <= IM->Start ; i++) {
+      len = (GLfloat) LEN_3FV( data[i] );
+      if (len > 0.0) len = 1.0/len;
+      dest[i] = len;
+   } 
+
+   while (!(flags[i] & (VERT_NORM|VERT_END_VB))) {
+      dest[i] = len;
+      i++;
+   }
+}
+
+
+
 /* Insert the active immediate struct onto the display list currently
  * being built.
  */
@@ -84,14 +133,14 @@ _tnl_compile_cassette( GLcontext *ctx, struct immediate *IM )
 
    _tnl_compute_orflag( IM, IM->Start );
 
-   /* Need to clear this flag, or fixup gets confused.  (The elements
-    * have been translated away by now.)  
+   /* Need to clear this flag, or fixup gets confused.  (The
+    * array-elements have been translated away by now, so it's ok to
+    * remove it.)
     */
    IM->OrFlag &= ~VERT_ELT;	
    IM->AndFlag &= ~VERT_ELT;	
 
    _tnl_fixup_input( ctx, IM );
-/*     _tnl_print_cassette( IM ); */
 
    node = (TNLvertexcassette *)
       _mesa_alloc_instruction(ctx,
@@ -113,6 +162,10 @@ _tnl_compile_cassette( GLcontext *ctx, struct immediate *IM )
    node->LastMaterial = im->LastMaterial;
    node->MaterialOrMask = im->MaterialOrMask;
    node->MaterialAndMask = im->MaterialAndMask;
+   
+   if (tnl->CalcDListNormalLengths) {
+      build_normal_lengths( im );
+   }
 
    if (ctx->ExecuteFlag) {
       execute_compiled_cassette( ctx, (void *)node );
@@ -308,6 +361,10 @@ execute_compiled_cassette( GLcontext *ctx, void *data )
 	    IM->Primitive[IM->LastPrimitive] & PRIM_MODE_MASK;
 
       _tnl_get_exec_copy_verts( ctx, IM );
+
+      if (IM->NormalLengthPtr) 
+	 fixup_normal_lengths( IM );
+      
       _tnl_run_cassette( ctx, IM );
 
       restore_compiled_primitives( ctx, IM );
@@ -365,6 +422,7 @@ _tnl_BeginCallList( GLcontext *ctx, GLuint list )
 void
 _tnl_EndCallList( GLcontext *ctx )
 {
+   (void) ctx;
 }
 
 
diff --git a/src/mesa/tnl/t_imm_exec.c b/src/mesa/tnl/t_imm_exec.c
index 37dd1597a5..547af43a39 100644
--- a/src/mesa/tnl/t_imm_exec.c
+++ b/src/mesa/tnl/t_imm_exec.c
@@ -1,4 +1,4 @@
-/* $Id: t_imm_exec.c,v 1.26 2001/05/16 09:28:32 keithw Exp $ */
+/* $Id: t_imm_exec.c,v 1.27 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -244,6 +244,7 @@ static void _tnl_vb_bind_immediate( GLcontext *ctx, struct immediate *IM )
    /* TexCoordPtr's are zeroed in loop below.
     */
    VB->NormalPtr = 0;
+   VB->NormalLengthPtr = 0;
    VB->FogCoordPtr = 0;
    VB->EdgeFlag = 0;
    VB->IndexPtr[0] = 0;
@@ -280,6 +281,8 @@ static void _tnl_vb_bind_immediate( GLcontext *ctx, struct immediate *IM )
       tmp->Normal.start = (GLfloat *)(IM->Normal + start);
       tmp->Normal.count = count;
       VB->NormalPtr = &tmp->Normal;
+      if (IM->NormalLengthPtr)
+	 VB->NormalLengthPtr = IM->NormalLengthPtr + start;
    }
 
    if (inputs & VERT_INDEX) {
diff --git a/src/mesa/tnl/t_imm_fixup.c b/src/mesa/tnl/t_imm_fixup.c
index 7f6ae40304..0336a9779e 100644
--- a/src/mesa/tnl/t_imm_fixup.c
+++ b/src/mesa/tnl/t_imm_fixup.c
@@ -1,4 +1,4 @@
-/* $Id: t_imm_fixup.c,v 1.21 2001/06/13 14:57:55 brianp Exp $ */
+/* $Id: t_imm_fixup.c,v 1.22 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -505,7 +505,8 @@ void _tnl_copy_immediate_vertices( GLcontext *ctx, struct immediate *next )
 
 /* Revive a compiled immediate struct - propogate new 'Current'
  * values.  Often this is redundant because the current values were
- * known and fixed up at compile time.
+ * known and fixed up at compile time (or in the first execution of
+ * the cassette).
  */
 void _tnl_fixup_compiled_cassette( GLcontext *ctx, struct immediate *IM )
 {
diff --git a/src/mesa/tnl/t_vb_normals.c b/src/mesa/tnl/t_vb_normals.c
index ce3f0b7b26..1a71b13be3 100644
--- a/src/mesa/tnl/t_vb_normals.c
+++ b/src/mesa/tnl/t_vb_normals.c
@@ -1,4 +1,4 @@
-/* $Id: t_vb_normals.c,v 1.8 2001/03/30 14:44:44 gareth Exp $ */
+/* $Id: t_vb_normals.c,v 1.9 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -65,10 +65,11 @@ static GLboolean run_normal_stage( GLcontext *ctx,
       store->NormalTransform( &ctx->ModelView,
 			      ctx->_ModelViewInvScale,
 			      VB->NormalPtr,
-			      0,
+			      VB->NormalLengthPtr,
 			      &store->normal );
 
    VB->NormalPtr = &store->normal;
+   VB->NormalLengthPtr = 0;	/* no longer valid */
    return GL_TRUE;
 }
 
diff --git a/src/mesa/tnl/tnl.h b/src/mesa/tnl/tnl.h
index 413864aba1..16470295f4 100644
--- a/src/mesa/tnl/tnl.h
+++ b/src/mesa/tnl/tnl.h
@@ -1,4 +1,4 @@
-/* $Id: tnl.h,v 1.7 2001/06/04 16:09:28 keithw Exp $ */
+/* $Id: tnl.h,v 1.8 2001/06/28 17:34:14 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -61,10 +61,15 @@ _tnl_wakeup_exec( GLcontext *ctx );
 extern void
 _tnl_wakeup_save_exec( GLcontext *ctx );
 
+/* Driver configuration options:
+ */
 extern void
 _tnl_need_projected_coords( GLcontext *ctx, GLboolean flag );
 
 extern void
 _tnl_need_dlist_loopback( GLcontext *ctx, GLboolean flag );
 
+extern void
+_tnl_need_dlist_norm_lengths( GLcontext *ctx, GLboolean flag );
+
 #endif