xserver and mesa git update 28-12-2010

1 files changed, 609 insertions, 609 deletions

diff --git a/mesalib/src/mesa/tnl/t_vb_texgen.c b/mesalib/src/mesa/tnl/t_vb_texgen.c
index 950e0f54e..228808461 100644
--- a/mesalib/src/mesa/tnl/t_vb_texgen.c
+++ b/mesalib/src/mesa/tnl/t_vb_texgen.c
@@ -1,609 +1,609 @@
-/*
- * Mesa 3-D graphics library
- * Version:  6.5
- *
- * Copyright (C) 1999-2006  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
- *    Keith Whitwell <keith@tungstengraphics.com>
- */
-
-/*
- * Regarding GL_NV_texgen_reflection:
- *
- * Portions of this software may use or implement intellectual
- * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims
- * any and all warranties with respect to such intellectual property,
- * including any use thereof or modifications thereto.
- */
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "main/macros.h"
-#include "main/imports.h"
-#include "main/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_COORD_UNITS];
-   texgen_func TexgenFunc[MAX_TEXTURE_COORD_UNITS];
-
-   /* Temporary values used in texgen.
-    */
-   GLfloat (*tmp_f)[3];
-   GLfloat *tmp_m;
-
-   /* Buffered outputs of the stage.
-    */
-   GLvector4f texcoord[MAX_TEXTURE_COORD_UNITS];
-};
-
-
-#define TEXGEN_STAGE_DATA(stage) ((struct texgen_stage_data *)stage->privatePtr)
-
-
-
-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)
-
-#define TEXGEN_NEED_M            (TEXGEN_SPHERE_MAP)
-#define TEXGEN_NEED_F            (TEXGEN_SPHERE_MAP        | \
-				  TEXGEN_REFLECTION_MAP_NV)
-
-
-
-static void build_m3( GLfloat f[][3], GLfloat m[],
-		      const GLvector4f *normal,
-		      const GLvector4f *eye )
-{
-   GLuint stride = eye->stride;
-   GLfloat *coord = (GLfloat *)eye->start;
-   GLuint count = eye->count;
-   const GLfloat *norm = normal->start;
-   GLuint i;
-
-   for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(norm,normal->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 * _mesa_inv_sqrtf(m[i]);
-      }
-   }
-}
-
-
-
-static void build_m2( GLfloat f[][3], GLfloat m[],
-		      const GLvector4f *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),STRIDE_F(norm,normal->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 * _mesa_inv_sqrtf(m[i]);
-      }
-   }
-}
-
-
-
-typedef void (*build_m_func)( GLfloat f[][3],
-			      GLfloat m[],
-			      const GLvector4f *normal,
-			      const GLvector4f *eye );
-
-
-static build_m_func build_m_tab[5] = {
-   NULL,
-   NULL,
-   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 GLvector4f *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 GLvector4f *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 GLvector4f *normal_vec,
-			      const GLvector4f *eye );
-
-
-
-/* Just treat 4-vectors as 3-vectors.
- */
-static build_f_func build_f_tab[5] = {
-   NULL,
-   NULL,
-   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->AttribPtr[VERT_ATTRIB_TEX0 + unit];
-   GLvector4f *out = &store->texcoord[unit];
-
-   build_f_tab[VB->EyePtr->size]( out->start,
-				  out->stride,
-				  VB->AttribPtr[_TNL_ATTRIB_NORMAL],
-				  VB->EyePtr );
-
-   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
-   out->count = VB->Count;
-   out->size = MAX2(in->size, 3);
-   if (in->size == 4) 
-      _mesa_copy_tab[0x8]( out, in );
-}
-
-
-
-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->AttribPtr[VERT_ATTRIB_TEX0 + unit];
-   GLvector4f *out = &store->texcoord[unit];
-   GLvector4f *normal = VB->AttribPtr[_TNL_ATTRIB_NORMAL];
-   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];
-   }
-
-
-   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
-   out->count = count;
-   out->size = MAX2(in->size, 3);
-   if (in->size == 4) 
-      _mesa_copy_tab[0x8]( out, in );
-}
-
-
-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->AttribPtr[VERT_ATTRIB_TEX0 + 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->AttribPtr[_TNL_ATTRIB_NORMAL],
-				    VB->EyePtr );
-
-   out->size = MAX2(in->size,2);
-
-   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;
-   }
-
-   out->count = count;
-   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_2;
-   if (in->size > 2)
-      _mesa_copy_tab[all_bits[in->size] & ~0x3]( out, in );
-}
-
-
-
-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->AttribPtr[VERT_ATTRIB_TEX0 + unit];
-   GLvector4f *out = &store->texcoord[unit];
-   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
-   const GLvector4f *obj = VB->AttribPtr[_TNL_ATTRIB_POS];
-   const GLvector4f *eye = VB->EyePtr;
-   const GLvector4f *normal = VB->AttribPtr[_TNL_ATTRIB_NORMAL];
-   const GLfloat *m = store->tmp_m;
-   const GLuint count = VB->Count;
-   GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->data;
-   GLfloat (*f)[3] = store->tmp_f;
-   GLuint copy;
-
-   if (texUnit->_GenFlags & TEXGEN_NEED_M) {
-      build_m_tab[eye->size]( store->tmp_f, store->tmp_m, normal, eye );
-   } else if (texUnit->_GenFlags & TEXGEN_NEED_F) {
-      build_f_tab[eye->size]( (GLfloat *)store->tmp_f, 3, normal, eye );
-   }
-
-
-   out->size = MAX2(in->size, store->TexgenSize[unit]);
-   out->flags |= (in->flags & VEC_SIZE_FLAGS) | texUnit->TexGenEnabled;
-   out->count = count;
-
-   copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
-   if (copy)
-      _mesa_copy_tab[copy]( out, in );
-
-   if (texUnit->TexGenEnabled & S_BIT) {
-      GLuint i;
-      switch (texUnit->GenS.Mode) {
-      case GL_OBJECT_LINEAR:
-	 _mesa_dotprod_tab[obj->size]( (GLfloat *)out->data,
-				       sizeof(out->data[0]), obj,
-				       texUnit->GenS.ObjectPlane );
-	 break;
-      case GL_EYE_LINEAR:
-	 _mesa_dotprod_tab[eye->size]( (GLfloat *)out->data,
-				       sizeof(out->data[0]), eye,
-				       texUnit->GenS.EyePlane );
-	 break;
-      case GL_SPHERE_MAP:
-         for (i = 0; i < count; i++)
-            texcoord[i][0] = f[i][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:
-	 _mesa_problem(ctx, "Bad S texgen");
-      }
-   }
-
-   if (texUnit->TexGenEnabled & T_BIT) {
-      GLuint i;
-      switch (texUnit->GenT.Mode) {
-      case GL_OBJECT_LINEAR:
-	 _mesa_dotprod_tab[obj->size]( &(out->data[0][1]),
-				       sizeof(out->data[0]), obj,
-				       texUnit->GenT.ObjectPlane );
-	 break;
-      case GL_EYE_LINEAR:
-	 _mesa_dotprod_tab[eye->size]( &(out->data[0][1]),
-				       sizeof(out->data[0]), eye,
-				       texUnit->GenT.EyePlane );
-	 break;
-      case GL_SPHERE_MAP:
-         for (i = 0; i < count; i++)
-            texcoord[i][1] = f[i][1] * m[i] + 0.5F;
-	 break;
-      case GL_REFLECTION_MAP_NV:
-	 for (i=0;i<count;i++)
-	     texcoord[i][1] = f[i][1];
-	 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:
-	 _mesa_problem(ctx, "Bad T texgen");
-      }
-   }
-
-   if (texUnit->TexGenEnabled & R_BIT) {
-      GLuint i;
-      switch (texUnit->GenR.Mode) {
-      case GL_OBJECT_LINEAR:
-	 _mesa_dotprod_tab[obj->size]( &(out->data[0][2]),
-				       sizeof(out->data[0]), obj,
-				       texUnit->GenR.ObjectPlane );
-	 break;
-      case GL_EYE_LINEAR:
-	 _mesa_dotprod_tab[eye->size]( &(out->data[0][2]),
-				       sizeof(out->data[0]), eye,
-				       texUnit->GenR.EyePlane );
-	 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:
-	 _mesa_problem(ctx, "Bad R texgen");
-      }
-   }
-
-   if (texUnit->TexGenEnabled & Q_BIT) {
-      switch (texUnit->GenQ.Mode) {
-      case GL_OBJECT_LINEAR:
-	 _mesa_dotprod_tab[obj->size]( &(out->data[0][3]),
-				       sizeof(out->data[0]), obj,
-				       texUnit->GenQ.ObjectPlane );
-	 break;
-      case GL_EYE_LINEAR:
-	 _mesa_dotprod_tab[eye->size]( &(out->data[0][3]),
-				       sizeof(out->data[0]), eye,
-				       texUnit->GenQ.EyePlane );
-	 break;
-      default:
-	 _mesa_problem(ctx, "Bad Q texgen");
-      }
-   }
-}
-
-
-
-
-static GLboolean run_texgen_stage( GLcontext *ctx,
-				   struct tnl_pipeline_stage *stage )
-{
-   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
-   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
-   GLuint i;
-
-   if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current) 
-      return GL_TRUE;
-
-   for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
-      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
-
-      if (texUnit->TexGenEnabled) {
-
-	 store->TexgenFunc[i]( ctx, store, i );
-
-         VB->AttribPtr[VERT_ATTRIB_TEX0 + i] = &store->texcoord[i];
-      }
-   }
-
-   return GL_TRUE;
-}
-
-
-static void validate_texgen_stage( GLcontext *ctx,
-				   struct tnl_pipeline_stage *stage )
-{
-   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
-   GLuint i;
-
-   if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current) 
-      return;
-
-   for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {
-      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
-
-      if (texUnit->TexGenEnabled) {
-	 GLuint sz;
-
-	 if (texUnit->TexGenEnabled & Q_BIT)
-	    sz = 4;
-	 else if (texUnit->TexGenEnabled & R_BIT)
-	    sz = 3;
-	 else if (texUnit->TexGenEnabled & T_BIT)
-	    sz = 2;
-	 else
-	    sz = 1;
-
-	 store->TexgenSize[i] = sz;
-	 store->TexgenFunc[i] = texgen; /* general solution */
-
-         /* look for special texgen cases */
-	 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;
-	 }
-      }
-   }
-}
-
-
-
-
-
-/* Called the first time stage->run() is invoked.
- */
-static GLboolean alloc_texgen_data( GLcontext *ctx,
-				    struct tnl_pipeline_stage *stage )
-{
-   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
-   struct texgen_stage_data *store;
-   GLuint i;
-
-   stage->privatePtr = CALLOC(sizeof(*store));
-   store = TEXGEN_STAGE_DATA(stage);
-   if (!store)
-      return GL_FALSE;
-
-   for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)
-      _mesa_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));
-
-   return GL_TRUE;
-}
-
-
-static void free_texgen_data( struct tnl_pipeline_stage *stage )
-
-{
-   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);
-   GLuint i;
-
-   if (store) {
-      for (i = 0 ; i < MAX_TEXTURE_COORD_UNITS ; i++)
-	 if (store->texcoord[i].data)
-	    _mesa_vector4f_free( &store->texcoord[i] );
-
-
-      if (store->tmp_f) FREE( store->tmp_f );
-      if (store->tmp_m) FREE( store->tmp_m );
-      FREE( store );
-      stage->privatePtr = NULL;
-   }
-}
-
-
-
-const struct tnl_pipeline_stage _tnl_texgen_stage =
-{
-   "texgen",			/* name */
-   NULL,			/* private data */
-   alloc_texgen_data,		/* destructor */
-   free_texgen_data,		/* destructor */
-   validate_texgen_stage,		/* check */
-   run_texgen_stage		/* run -- initially set to alloc data */
-};
+/*

+ * Mesa 3-D graphics library

+ * Version:  6.5

+ *

+ * Copyright (C) 1999-2006  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

+ *    Keith Whitwell <keith@tungstengraphics.com>

+ */

+

+/*

+ * Regarding GL_NV_texgen_reflection:

+ *

+ * Portions of this software may use or implement intellectual

+ * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims

+ * any and all warranties with respect to such intellectual property,

+ * including any use thereof or modifications thereto.

+ */

+

+#include "main/glheader.h"

+#include "main/colormac.h"

+#include "main/macros.h"

+#include "main/imports.h"

+#include "main/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)( struct gl_context *ctx,

+			     struct texgen_stage_data *store,

+			     GLuint unit);

+

+

+struct texgen_stage_data {

+

+   /* Per-texunit derived state.

+    */

+   GLuint TexgenSize[MAX_TEXTURE_COORD_UNITS];

+   texgen_func TexgenFunc[MAX_TEXTURE_COORD_UNITS];

+

+   /* Temporary values used in texgen.

+    */

+   GLfloat (*tmp_f)[3];

+   GLfloat *tmp_m;

+

+   /* Buffered outputs of the stage.

+    */

+   GLvector4f texcoord[MAX_TEXTURE_COORD_UNITS];

+};

+

+

+#define TEXGEN_STAGE_DATA(stage) ((struct texgen_stage_data *)stage->privatePtr)

+

+

+

+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)

+

+#define TEXGEN_NEED_M            (TEXGEN_SPHERE_MAP)

+#define TEXGEN_NEED_F            (TEXGEN_SPHERE_MAP        | \

+				  TEXGEN_REFLECTION_MAP_NV)

+

+

+

+static void build_m3( GLfloat f[][3], GLfloat m[],

+		      const GLvector4f *normal,

+		      const GLvector4f *eye )

+{

+   GLuint stride = eye->stride;

+   GLfloat *coord = (GLfloat *)eye->start;

+   GLuint count = eye->count;

+   const GLfloat *norm = normal->start;

+   GLuint i;

+

+   for (i=0;i<count;i++,STRIDE_F(coord,stride),STRIDE_F(norm,normal->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 * _mesa_inv_sqrtf(m[i]);

+      }

+   }

+}

+

+

+

+static void build_m2( GLfloat f[][3], GLfloat m[],

+		      const GLvector4f *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),STRIDE_F(norm,normal->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 * _mesa_inv_sqrtf(m[i]);

+      }

+   }

+}

+

+

+

+typedef void (*build_m_func)( GLfloat f[][3],

+			      GLfloat m[],

+			      const GLvector4f *normal,

+			      const GLvector4f *eye );

+

+

+static build_m_func build_m_tab[5] = {

+   NULL,

+   NULL,

+   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 GLvector4f *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 GLvector4f *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 GLvector4f *normal_vec,

+			      const GLvector4f *eye );

+

+

+

+/* Just treat 4-vectors as 3-vectors.

+ */

+static build_f_func build_f_tab[5] = {

+   NULL,

+   NULL,

+   build_f2,

+   build_f3,

+   build_f3

+};

+

+

+

+/* Special case texgen functions.

+ */

+static void texgen_reflection_map_nv( struct gl_context *ctx,

+				      struct texgen_stage_data *store,

+				      GLuint unit )

+{

+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

+   GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];

+   GLvector4f *out = &store->texcoord[unit];

+

+   build_f_tab[VB->EyePtr->size]( out->start,

+				  out->stride,

+				  VB->AttribPtr[_TNL_ATTRIB_NORMAL],

+				  VB->EyePtr );

+

+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;

+   out->count = VB->Count;

+   out->size = MAX2(in->size, 3);

+   if (in->size == 4) 

+      _mesa_copy_tab[0x8]( out, in );

+}

+

+

+

+static void texgen_normal_map_nv( struct gl_context *ctx,

+				  struct texgen_stage_data *store,

+				  GLuint unit )

+{

+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

+   GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];

+   GLvector4f *out = &store->texcoord[unit];

+   GLvector4f *normal = VB->AttribPtr[_TNL_ATTRIB_NORMAL];

+   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];

+   }

+

+

+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;

+   out->count = count;

+   out->size = MAX2(in->size, 3);

+   if (in->size == 4) 

+      _mesa_copy_tab[0x8]( out, in );

+}

+

+

+static void texgen_sphere_map( struct gl_context *ctx,

+			       struct texgen_stage_data *store,

+			       GLuint unit )

+{

+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

+   GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + 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->AttribPtr[_TNL_ATTRIB_NORMAL],

+				    VB->EyePtr );

+

+   out->size = MAX2(in->size,2);

+

+   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;

+   }

+

+   out->count = count;

+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_2;

+   if (in->size > 2)

+      _mesa_copy_tab[all_bits[in->size] & ~0x3]( out, in );

+}

+

+

+

+static void texgen( struct gl_context *ctx,

+		    struct texgen_stage_data *store,

+		    GLuint unit )

+{

+   TNLcontext *tnl = TNL_CONTEXT(ctx);

+   struct vertex_buffer *VB = &tnl->vb;

+   GLvector4f *in = VB->AttribPtr[VERT_ATTRIB_TEX0 + unit];

+   GLvector4f *out = &store->texcoord[unit];

+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];

+   const GLvector4f *obj = VB->AttribPtr[_TNL_ATTRIB_POS];

+   const GLvector4f *eye = VB->EyePtr;

+   const GLvector4f *normal = VB->AttribPtr[_TNL_ATTRIB_NORMAL];

+   const GLfloat *m = store->tmp_m;

+   const GLuint count = VB->Count;

+   GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->data;

+   GLfloat (*f)[3] = store->tmp_f;

+   GLuint copy;

+

+   if (texUnit->_GenFlags & TEXGEN_NEED_M) {

+      build_m_tab[eye->size]( store->tmp_f, store->tmp_m, normal, eye );

+   } else if (texUnit->_GenFlags & TEXGEN_NEED_F) {

+      build_f_tab[eye->size]( (GLfloat *)store->tmp_f, 3, normal, eye );

+   }

+

+

+   out->size = MAX2(in->size, store->TexgenSize[unit]);

+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | texUnit->TexGenEnabled;

+   out->count = count;

+

+   copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);

+   if (copy)

+      _mesa_copy_tab[copy]( out, in );

+

+   if (texUnit->TexGenEnabled & S_BIT) {

+      GLuint i;

+      switch (texUnit->GenS.Mode) {

+      case GL_OBJECT_LINEAR:

+	 _mesa_dotprod_tab[obj->size]( (GLfloat *)out->data,

+				       sizeof(out->data[0]), obj,

+				       texUnit->GenS.ObjectPlane );

+	 break;

+      case GL_EYE_LINEAR:

+	 _mesa_dotprod_tab[eye->size]( (GLfloat *)out->data,

+				       sizeof(out->data[0]), eye,

+				       texUnit->GenS.EyePlane );

+	 break;

+      case GL_SPHERE_MAP:

+         for (i = 0; i < count; i++)

+            texcoord[i][0] = f[i][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:

+	 _mesa_problem(ctx, "Bad S texgen");

+      }

+   }

+

+   if (texUnit->TexGenEnabled & T_BIT) {

+      GLuint i;

+      switch (texUnit->GenT.Mode) {

+      case GL_OBJECT_LINEAR:

+	 _mesa_dotprod_tab[obj->size]( &(out->data[0][1]),

+				       sizeof(out->data[0]), obj,

+				       texUnit->GenT.ObjectPlane );

+	 break;

+      case GL_EYE_LINEAR:

+	 _mesa_dotprod_tab[eye->size]( &(out->data[0][1]),

+				       sizeof(out->data[0]), eye,

+				       texUnit->GenT.EyePlane );

+	 break;

+      case GL_SPHERE_MAP:

+         for (i = 0; i < count; i++)

+            texcoord[i][1] = f[i][1] * m[i] + 0.5F;

+	 break;

+      case GL_REFLECTION_MAP_NV:

+	 for (i=0;i<count;i++)

+	     texcoord[i][1] = f[i][1];

+	 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:

+	 _mesa_problem(ctx, "Bad T texgen");

+      }

+   }

+

+   if (texUnit->TexGenEnabled & R_BIT) {

+      GLuint i;

+      switch (texUnit->GenR.Mode) {

+      case GL_OBJECT_LINEAR:

+	 _mesa_dotprod_tab[obj->size]( &(out->data[0][2]),

+				       sizeof(out->data[0]), obj,

+				       texUnit->GenR.ObjectPlane );

+	 break;

+      case GL_EYE_LINEAR:

+	 _mesa_dotprod_tab[eye->size]( &(out->data[0][2]),

+				       sizeof(out->data[0]), eye,

+				       texUnit->GenR.EyePlane );

+	 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:

+	 _mesa_problem(ctx, "Bad R texgen");

+      }

+   }

+

+   if (texUnit->TexGenEnabled & Q_BIT) {

+      switch (texUnit->GenQ.Mode) {

+      case GL_OBJECT_LINEAR:

+	 _mesa_dotprod_tab[obj->size]( &(out->data[0][3]),

+				       sizeof(out->data[0]), obj,

+				       texUnit->GenQ.ObjectPlane );

+	 break;

+      case GL_EYE_LINEAR:

+	 _mesa_dotprod_tab[eye->size]( &(out->data[0][3]),

+				       sizeof(out->data[0]), eye,

+				       texUnit->GenQ.EyePlane );

+	 break;

+      default:

+	 _mesa_problem(ctx, "Bad Q texgen");

+      }

+   }

+}

+

+

+

+

+static GLboolean run_texgen_stage( struct gl_context *ctx,

+				   struct tnl_pipeline_stage *stage )

+{

+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

+   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);

+   GLuint i;

+

+   if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current) 

+      return GL_TRUE;

+

+   for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {

+      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];

+

+      if (texUnit->TexGenEnabled) {

+

+	 store->TexgenFunc[i]( ctx, store, i );

+

+         VB->AttribPtr[VERT_ATTRIB_TEX0 + i] = &store->texcoord[i];

+      }

+   }

+

+   return GL_TRUE;

+}

+

+

+static void validate_texgen_stage( struct gl_context *ctx,

+				   struct tnl_pipeline_stage *stage )

+{

+   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);

+   GLuint i;

+

+   if (!ctx->Texture._TexGenEnabled || ctx->VertexProgram._Current) 

+      return;

+

+   for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++) {

+      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];

+

+      if (texUnit->TexGenEnabled) {

+	 GLuint sz;

+

+	 if (texUnit->TexGenEnabled & Q_BIT)

+	    sz = 4;

+	 else if (texUnit->TexGenEnabled & R_BIT)

+	    sz = 3;

+	 else if (texUnit->TexGenEnabled & T_BIT)

+	    sz = 2;

+	 else

+	    sz = 1;

+

+	 store->TexgenSize[i] = sz;

+	 store->TexgenFunc[i] = texgen; /* general solution */

+

+         /* look for special texgen cases */

+	 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;

+	 }

+      }

+   }

+}

+

+

+

+

+

+/* Called the first time stage->run() is invoked.

+ */

+static GLboolean alloc_texgen_data( struct gl_context *ctx,

+				    struct tnl_pipeline_stage *stage )

+{

+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;

+   struct texgen_stage_data *store;

+   GLuint i;

+

+   stage->privatePtr = CALLOC(sizeof(*store));

+   store = TEXGEN_STAGE_DATA(stage);

+   if (!store)

+      return GL_FALSE;

+

+   for (i = 0 ; i < ctx->Const.MaxTextureCoordUnits ; i++)

+      _mesa_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));

+

+   return GL_TRUE;

+}

+

+

+static void free_texgen_data( struct tnl_pipeline_stage *stage )

+

+{

+   struct texgen_stage_data *store = TEXGEN_STAGE_DATA(stage);

+   GLuint i;

+

+   if (store) {

+      for (i = 0 ; i < MAX_TEXTURE_COORD_UNITS ; i++)

+	 if (store->texcoord[i].data)

+	    _mesa_vector4f_free( &store->texcoord[i] );

+

+

+      if (store->tmp_f) FREE( store->tmp_f );

+      if (store->tmp_m) FREE( store->tmp_m );

+      FREE( store );

+      stage->privatePtr = NULL;

+   }

+}

+

+

+

+const struct tnl_pipeline_stage _tnl_texgen_stage =

+{

+   "texgen",			/* name */

+   NULL,			/* private data */

+   alloc_texgen_data,		/* destructor */

+   free_texgen_data,		/* destructor */

+   validate_texgen_stage,		/* check */

+   run_texgen_stage		/* run -- initially set to alloc data */

+};