Major rework of tnl module

New array_cache module
Support 8 texture units in core mesa (now support 8 everywhere)
Rework core mesa statechange operations to avoid flushing on many
noop statechanges.

1 files changed, 685 insertions, 0 deletions

diff --git a/src/mesa/tnl/t_vb_texgen.c b/src/mesa/tnl/t_vb_texgen.c
new file mode 100644
index 0000000000..e975665e8a
--- /dev/null
+++ b/src/mesa/tnl/t_vb_texgen.c
@@ -0,0 +1,685 @@
+/* $Id: t_vb_texgen.c,v 1.1 2000/12/26 05:09:33 keithw Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.5
+ *
+ * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Brian Paul <brian@valinux.com>
+ *    Keith Whitwell <keithw@valinux.com>
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "macros.h"
+#include "mmath.h"
+#include "mem.h"
+#include "mtypes.h"
+
+#include "math/m_xform.h"
+
+#include "t_context.h"
+#include "t_pipeline.h"
+
+
+/***********************************************************************
+ * Automatic texture coordinate generation (texgen) code.
+ */
+
+
+struct texgen_stage_data;
+
+typedef void (*texgen_func)( GLcontext *ctx,
+			     struct texgen_stage_data *store,
+			     GLuint unit);
+
+
+struct texgen_stage_data {
+
+   /* Per-texunit derived state.
+    */
+   GLuint TexgenSize[MAX_TEXTURE_UNITS];
+   GLuint TexgenHoles[MAX_TEXTURE_UNITS];
+   texgen_func TexgenFunc[MAX_TEXTURE_UNITS];
+
+   /* Temporary values used in texgen.
+    */
+   GLfloat (*tmp_f)[3];
+   GLfloat *tmp_m;
+
+   /* Buffered outputs of the stage.
+    */
+   GLvector4f texcoord[MAX_TEXTURE_UNITS];
+};
+
+
+#define TEXGEN_STAGE_DATA(stage) ((struct texgen_stage_data *)stage->private)
+
+
+
+
+static GLuint all_bits[5] = {
+   0,
+   VEC_SIZE_1,
+   VEC_SIZE_2,
+   VEC_SIZE_3,
+   VEC_SIZE_4,
+};
+
+#define VEC_SIZE_FLAGS (VEC_SIZE_1|VEC_SIZE_2|VEC_SIZE_3|VEC_SIZE_4)
+
+/* 
+ */
+static void build_m3(GLfloat f[][3], GLfloat m[],
+		     const GLvector3f *normal, 
+		     const GLvector4f *eye )
+{
+   GLuint stride = eye->stride;
+   GLfloat *coord = (GLfloat *)eye->start;
+   GLuint count = eye->count;
+   const GLfloat *norm = normal->start;
+   GLuint i;
+
+
+   /* KW: Had to rearrange this loop to avoid a compiler bug with gcc
+    *     2.7.3.1 at -O3 optimization.  Using -fno-strength-reduce
+    *     also fixed the bug - is this generally necessary?  
+    */
+   for (i=0;i<count;i++,STRIDE_F(coord,stride)) {
+      GLfloat u[3], two_nu, fx, fy, fz;
+      COPY_3V( u, coord ); 
+      NORMALIZE_3FV( u );
+      two_nu = 2.0F * DOT3(norm,u);
+      fx = f[i][0] = u[0] - norm[0] * two_nu;
+      fy = f[i][1] = u[1] - norm[1] * two_nu;
+      fz = f[i][2] = u[2] - norm[2] * two_nu;
+      m[i] = fx * fx + fy * fy + (fz + 1.0F) * (fz + 1.0F);
+      if (m[i] != 0.0F) {
+	 m[i] = 0.5F / (GLfloat) GL_SQRT(m[i]);
+      }
+
+      STRIDE_F(norm, normal->stride);
+   }
+}
+
+
+
+static void build_m2(GLfloat f[][3], GLfloat m[],
+		     const GLvector3f *normal, 
+		     const GLvector4f *eye )
+{
+   GLuint stride = eye->stride;
+   GLfloat *coord = eye->start;
+   GLuint count = eye->count;
+
+   GLfloat *norm = normal->start;
+   GLuint i;
+
+   for (i=0;i<count;i++,STRIDE_F(coord,stride)) {
+
+      GLfloat u[3], two_nu, fx, fy, fz;
+      COPY_2V( u, coord ); 
+      u[2] = 0;
+      NORMALIZE_3FV( u );
+      two_nu = 2.0F * DOT3(norm,u);
+      fx = f[i][0] = u[0] - norm[0] * two_nu;
+      fy = f[i][1] = u[1] - norm[1] * two_nu;
+      fz = f[i][2] = u[2] - norm[2] * two_nu;
+      m[i] = fx * fx + fy * fy + (fz + 1.0F) * (fz + 1.0F);
+      if (m[i] != 0.0F) {
+	 m[i] = 0.5F / (GLfloat) GL_SQRT(m[i]);
+      }
+
+      STRIDE_F(norm, normal->stride);
+   }
+}
+
+
+
+typedef void (*build_m_func)(GLfloat f[][3],
+			     GLfloat m[],
+			     const GLvector3f *normal,
+			     const GLvector4f *eye );
+
+
+
+static build_m_func build_m_tab[5] = {
+   0,
+   0,
+   build_m2,
+   build_m3,
+   build_m3
+};
+
+
+/* This is unusual in that we respect the stride of the output vector
+ * (f).  This allows us to pass in either a texcoord vector4f, or a
+ * temporary vector3f.  
+ */
+static void build_f3( GLfloat *f, 
+		      GLuint fstride,
+		      const GLvector3f *normal,
+		      const GLvector4f *eye )
+{
+   GLuint stride = eye->stride;
+   GLfloat *coord = eye->start;
+   GLuint count = eye->count;
+
+   GLfloat *norm = normal->start;
+   GLuint i;
+
+   for (i=0;i<count;i++) {
+      GLfloat u[3], two_nu;
+      COPY_3V( u, coord ); 
+      NORMALIZE_3FV( u );
+      two_nu = 2.0F * DOT3(norm,u);
+      f[0] = u[0] - norm[0] * two_nu;
+      f[1] = u[1] - norm[1] * two_nu;
+      f[2] = u[2] - norm[2] * two_nu;
+      STRIDE_F(coord,stride);
+      STRIDE_F(f,fstride); 
+      STRIDE_F(norm, normal->stride);
+   }
+}
+
+
+static void build_f2( GLfloat *f, 
+		      GLuint fstride,
+		      const GLvector3f *normal,
+		      const GLvector4f *eye )
+{
+   GLuint stride = eye->stride;
+   GLfloat *coord = eye->start;
+   GLuint count = eye->count;
+   GLfloat *norm = normal->start;
+   GLuint i;
+
+   for (i=0;i<count;i++) {
+
+      GLfloat u[3], two_nu;
+      COPY_2V( u, coord ); 
+      u[2] = 0;
+      NORMALIZE_3FV( u );
+      two_nu = 2.0F * DOT3(norm,u);
+      f[0] = u[0] - norm[0] * two_nu;
+      f[1] = u[1] - norm[1] * two_nu;
+      f[2] = u[2] - norm[2] * two_nu;
+
+      STRIDE_F(coord,stride);
+      STRIDE_F(f,fstride);
+      STRIDE_F(norm, normal->stride);
+   }
+}
+
+typedef void (*build_f_func)( GLfloat *f,
+			      GLuint fstride,
+			      const GLvector3f *normal_vec,
+			      const GLvector4f *eye );
+
+
+
+/* Just treat 4-vectors as 3-vectors. 
+ */
+static build_f_func build_f_tab[5] = {
+   0,
+   0,
+   build_f2,
+   build_f3,
+   build_f3		
+};
+
+
+/* Special case texgen functions.
+ */
+static void texgen_reflection_map_nv( GLcontext *ctx,
+				      struct texgen_stage_data *store,
+				      GLuint unit )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   GLvector4f *in = VB->TexCoordPtr[unit];
+   GLvector4f *out = &store->texcoord[unit];
+
+   build_f_tab[VB->EyePtr->size]( out->start,
+				  out->stride,
+				  VB->NormalPtr, 
+				  VB->EyePtr ); 
+   
+   if (in) {
+      out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
+      out->count = in->count;
+      out->size = MAX2(in->size, 3);
+      if (in->size == 4) 
+	 gl_copy_tab[0][0x8](out, in, 0);
+   } 
+   else {
+      out->flags |= VEC_SIZE_3;
+      out->size = 3;
+      out->count = in->count;
+   }
+   
+}
+
+
+
+static void texgen_normal_map_nv( GLcontext *ctx,
+				  struct texgen_stage_data *store,
+				  GLuint unit )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   GLvector4f *in = VB->TexCoordPtr[unit];
+   GLvector4f *out = &store->texcoord[unit];
+   GLvector3f *normal = VB->NormalPtr;   
+   GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->start;
+   GLuint count = VB->Count;
+   GLuint i;
+   const GLfloat *norm = normal->start;
+
+   for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
+      texcoord[i][0] = norm[0];
+      texcoord[i][1] = norm[1];
+      texcoord[i][2] = norm[2];
+   }
+
+
+   if (in) {
+      out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
+      out->count = in->count;
+      out->size = MAX2(in->size, 3);
+      if (in->size == 4) 
+	 gl_copy_tab[0][0x8](out, in, 0);
+   } 
+   else {
+      out->flags |= VEC_SIZE_3;
+      out->size = 3;
+      out->count = in->count;
+   }
+}
+
+
+static void texgen_sphere_map( GLcontext *ctx,
+			       struct texgen_stage_data *store,
+			       GLuint unit )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   GLvector4f *in = VB->TexCoordPtr[unit];
+   GLvector4f *out = &store->texcoord[unit];
+   GLfloat (*texcoord)[4] = (GLfloat (*)[4]) out->start;
+   GLuint count = VB->Count;
+   GLuint i;
+   GLfloat (*f)[3] = store->tmp_f;
+   GLfloat *m = store->tmp_m;
+
+   (build_m_tab[VB->EyePtr->size])( store->tmp_f, 
+				    store->tmp_m, 
+				    VB->NormalPtr, 
+				    VB->EyePtr ); 
+
+   for (i=0;i<count;i++) {
+      texcoord[i][0] = f[i][0] * m[i] + 0.5F;
+      texcoord[i][1] = f[i][1] * m[i] + 0.5F;
+   }
+
+   if (in) {
+      out->size = MAX2(in->size,2);
+      out->count = in->count;
+      out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_2;
+      if (in->size > 2) 
+	 gl_copy_tab[0][all_bits[in->size] & ~0x3](out, in, 0);
+   } else {
+      out->size = 2;
+      out->flags |= VEC_SIZE_2;
+      out->count = in->count;
+   }
+}
+
+
+
+static void texgen( GLcontext *ctx, 
+		    struct texgen_stage_data *store,
+		    GLuint unit )
+{
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &tnl->vb;
+   GLvector4f *in = VB->TexCoordPtr[unit];
+   GLvector4f *out = &store->texcoord[unit];
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+   const GLvector4f *obj = VB->ObjPtr;
+   const GLvector4f *eye = VB->EyePtr;
+   const GLvector3f *normal = VB->NormalPtr;
+   GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->data;
+   GLfloat *indata;
+   GLuint count = VB->Count;
+   GLfloat (*f)[3] = store->tmp_f;
+   GLfloat *m = store->tmp_m;
+
+
+   if (texUnit->_GenFlags & TEXGEN_NEED_M) {
+      build_m_tab[in->size]( store->tmp_f, store->tmp_m, normal, eye ); 
+   } else if (texUnit->_GenFlags & TEXGEN_NEED_F) {
+      build_f_tab[in->size]( (GLfloat *)store->tmp_f, 3, normal, eye ); 
+   }
+
+   if (in != out) {
+      GLuint copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
+      if (copy)
+	 gl_copy_tab[0][copy](out, in, 0);
+   }
+
+   if (store->TexgenHoles[unit])
+   {
+      GLuint holes = (~all_bits[in->size] & store->TexgenHoles[unit]);
+      if (holes) {
+	 if (holes & VEC_DIRTY_2) gl_vector4f_clean_elem(out, count, 2);
+	 if (holes & VEC_DIRTY_1) gl_vector4f_clean_elem(out, count, 1);
+	 if (holes & VEC_DIRTY_0) gl_vector4f_clean_elem(out, count, 0);
+      }
+   }
+
+   out->size = MAX2(in->size, store->TexgenSize[unit]);
+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | texUnit->TexGenEnabled;
+   out->count = in->count;
+
+   if (texUnit->TexGenEnabled & S_BIT) {
+      GLuint i;
+      switch (texUnit->GenModeS) {
+      case GL_OBJECT_LINEAR:
+	 (gl_dotprod_tab[0][obj->size])((GLfloat *)out->data,
+					sizeof(out->data[0]), obj, 
+					texUnit->ObjectPlaneS, 0);
+	 break;
+      case GL_EYE_LINEAR:
+	 (gl_dotprod_tab[0][eye->size])((GLfloat *)out->data, 
+					sizeof(out->data[0]), eye,
+					texUnit->EyePlaneS, 0);
+	 break;
+      case GL_SPHERE_MAP: 
+	 for (indata=in->start,i=0 ; i<count ; i++, STRIDE_F(indata,in->stride))
+	    texcoord[i][0] = indata[0] * m[i] + 0.5F;
+	 break;
+      case GL_REFLECTION_MAP_NV: 
+	 for (i=0;i<count;i++) 
+	     texcoord[i][0] = f[i][0];
+	 break;
+      case GL_NORMAL_MAP_NV: {
+	 const GLfloat *norm = normal->start;
+	 for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
+	     texcoord[i][0] = norm[0];
+	 }
+	 break;
+      }
+      default:
+	 gl_problem(ctx, "Bad S texgen");
+      }
+   } 
+
+   if (texUnit->TexGenEnabled & T_BIT) {
+      GLuint i;
+      switch (texUnit->GenModeT) {
+      case GL_OBJECT_LINEAR:
+	 (gl_dotprod_tab[0][obj->size])(&(out->data[0][1]), 
+					sizeof(out->data[0]), obj, 
+					texUnit->ObjectPlaneT, 0);
+	 break;
+      case GL_EYE_LINEAR:
+	 (gl_dotprod_tab[0][eye->size])(&(out->data[0][1]), 
+					sizeof(out->data[0]), eye, 
+					texUnit->EyePlaneT, 0);
+	 break; 
+      case GL_SPHERE_MAP: 
+	 for (indata=in->start,i=0; i<count ;i++,STRIDE_F(indata,in->stride)) 
+	     texcoord[i][1] = indata[1] * m[i] + 0.5F;
+	 break;      
+      case GL_REFLECTION_MAP_NV: 
+	 for (i=0;i<count;i++) 
+	     texcoord[i][0] = f[i][0];
+	 break;
+      case GL_NORMAL_MAP_NV: {
+	 const GLfloat *norm = normal->start;
+	 for (i=0;i<count;i++, STRIDE_F(norm, normal->stride)) {
+	     texcoord[i][1] = norm[1];
+	 }
+	 break;
+      }
+      default:
+	 gl_problem(ctx, "Bad T texgen");
+      }
+   }
+
+   if (texUnit->TexGenEnabled & R_BIT) {
+      GLuint i;
+      switch (texUnit->GenModeR) {
+      case GL_OBJECT_LINEAR:
+	 (gl_dotprod_tab[0][obj->size])(&(out->data[0][2]), 
+					sizeof(out->data[0]), obj, 
+					texUnit->ObjectPlaneR, 0);
+	 break;
+      case GL_EYE_LINEAR:
+	 (gl_dotprod_tab[0][eye->size])(&(out->data[0][2]), 
+					sizeof(out->data[0]), eye,
+					texUnit->EyePlaneR, 0);
+	 break;
+      case GL_REFLECTION_MAP_NV: 
+	 for (i=0;i<count;i++) 
+	     texcoord[i][2] = f[i][2];
+	 break;
+      case GL_NORMAL_MAP_NV: {
+	 const GLfloat *norm = normal->start;
+	 for (i=0;i<count;i++,STRIDE_F(norm, normal->stride)) {
+	     texcoord[i][2] = norm[2];
+	 }
+	 break;
+      }
+      default:
+	 gl_problem(ctx, "Bad R texgen");
+      }
+   }
+
+   if (texUnit->TexGenEnabled & Q_BIT) {
+      switch (texUnit->GenModeQ) {
+      case GL_OBJECT_LINEAR:
+	 (gl_dotprod_tab[0][obj->size])(&(out->data[0][3]), 
+					sizeof(out->data[0]), obj, 
+					texUnit->ObjectPlaneQ, 0);
+	 break;
+      case GL_EYE_LINEAR:
+	 (gl_dotprod_tab[0][eye->size])(&(out->data[0][3]), 
+					sizeof(out->data[0]), eye,
+					texUnit->EyePlaneQ, 0);
+	 break;
+      default:
+	 gl_problem(ctx, "Bad Q texgen");
+      }
+   }
+}
+
+
+
+static GLboolean run_texgen_stage( GLcontext *ctx, 
+				   struct gl_pipeline_stage *stage )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; 
+   struct texgen_stage_data *store = TEXGEN_STAGE_DATA( stage );
+   GLuint i;
+
+   for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++) 
+      if (ctx->_Enabled & ENABLE_TEXGEN(i)) {
+	 if (stage->changed_inputs & (VERT_EYE | VERT_NORM | VERT_TEX(i)))
+	    store->TexgenFunc[i]( ctx, store, i );
+
+	 VB->TexCoordPtr[i] = &store->texcoord[i];
+      }
+
+   return GL_TRUE;
+}
+
+
+
+
+static GLboolean run_validate_texgen_stage( GLcontext *ctx, 
+					    struct gl_pipeline_stage *stage )
+{
+   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
+   GLuint i;
+
+   for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++) {
+      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
+
+      if (texUnit->TexGenEnabled) {
+	 GLuint sz;
+
+	 if (texUnit->TexGenEnabled & R_BIT)
+	    sz = 4;
+	 else if (texUnit->TexGenEnabled & Q_BIT)
+	    sz = 3;
+	 else if (texUnit->TexGenEnabled & T_BIT)
+	    sz = 2;
+	 else
+	    sz = 1;
+	
+	 store->TexgenSize[i] = sz;
+	 store->TexgenHoles[i] = (all_bits[sz] & ~texUnit->TexGenEnabled);
+	 store->TexgenFunc[i] = texgen;
+	
+	 if (texUnit->TexGenEnabled == (S_BIT|T_BIT|R_BIT)) {
+	    if (texUnit->_GenFlags == TEXGEN_REFLECTION_MAP_NV) {
+	       store->TexgenFunc[i] = texgen_reflection_map_nv;
+	    }
+	    else if (texUnit->_GenFlags == TEXGEN_NORMAL_MAP_NV) {
+	       store->TexgenFunc[i] = texgen_normal_map_nv;
+	    }
+	 }
+	 else if (texUnit->TexGenEnabled == (S_BIT|T_BIT) &&
+		  texUnit->_GenFlags == TEXGEN_SPHERE_MAP) {
+	    store->TexgenFunc[i] = texgen_sphere_map;
+	 }
+      }
+   }
+
+   stage->run = run_texgen_stage;
+   return stage->run( ctx, stage );
+}
+
+
+static void check_texgen( GLcontext *ctx, struct gl_pipeline_stage *stage )
+{
+   GLuint i;
+   stage->active = 0;
+
+   if (ctx->_Enabled & ENABLE_TEXGEN_ANY) {
+      GLuint inputs = 0;
+      GLuint outputs = 0;
+
+      if (ctx->Texture._GenFlags & TEXGEN_NEED_VERTICES)
+	 inputs |= VERT_EYE;
+
+      if (ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS)
+	 inputs |= VERT_NORM;
+
+      for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++) 
+	 if (ctx->_Enabled & ENABLE_TEXGEN(i)) 
+	 {
+	    outputs |= VERT_TEX(i);
+
+	    /* Need the original input in case it contains a Q coord:
+	     * (sigh)
+	     */
+	    if ((ctx->Texture.Unit[i]._ReallyEnabled|Q_BIT) &
+		~ctx->Texture.Unit[i].TexGenEnabled)
+	       inputs |= VERT_TEX(i);
+
+	    /* Something for Feedback? */
+	 }
+
+      if (stage->private)
+	 stage->run = run_validate_texgen_stage;
+      stage->active = 1;
+      stage->inputs = inputs;
+      stage->outputs = outputs;
+   }
+}
+ 
+
+
+
+/* Called the first time stage->run() is invoked.
+ */
+static GLboolean alloc_texgen_data( GLcontext *ctx, 
+				    struct gl_pipeline_stage *stage )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; 
+   struct texgen_stage_data *store;
+   GLuint i;
+
+   stage->private = CALLOC(sizeof(*store));
+   store = TEXGEN_STAGE_DATA(stage);
+   if (!store)
+      return GL_FALSE;
+
+   for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
+      gl_vector4f_alloc( &store->texcoord[i], 0, VB->Size, 32 );
+
+   store->tmp_f = (GLfloat (*)[3]) MALLOC(VB->Size * sizeof(GLfloat) * 3);
+   store->tmp_m = (GLfloat *) MALLOC(VB->Size * sizeof(GLfloat));
+
+   /* Now validate and run the stage.
+    */
+   stage->run = run_validate_texgen_stage;
+   return stage->run( ctx, stage );
+}
+
+
+static void free_texgen_data( struct gl_pipeline_stage *stage )
+
+{
+   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
+   GLuint i;
+
+   if (store) {
+      for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++)
+	 if (store->texcoord[i].data) 
+	    gl_vector4f_free( &store->texcoord[i] );
+
+      
+      if (store->tmp_f) FREE( store->tmp_f );
+      if (store->tmp_m) FREE( store->tmp_m );
+      FREE( store );
+      stage->private = 0;
+   }
+}
+
+
+   
+const struct gl_pipeline_stage _tnl_texgen_stage = 
+{ 
+   "texgen",
+   _NEW_TEXTURE,		/* when to call check() */
+   _NEW_TEXTURE,		/* when to invalidate stored data */
+   0,0,0,			/* active, inputs, outputs */
+   0,0,				/* changed_inputs, private */
+   free_texgen_data,		/* destructor */
+   check_texgen,		/* check */
+   alloc_texgen_data		/* run -- initially set to alloc data */
+};
+
+