Added MesaLib-7.6

1 files changed, 611 insertions, 0 deletions

diff --git a/mesalib/src/mesa/tnl/t_vb_texgen.c b/mesalib/src/mesa/tnl/t_vb_texgen.c
new file mode 100644
index 000000000..7c1819b22
--- /dev/null
+++ b/mesalib/src/mesa/tnl/t_vb_texgen.c
@@ -0,0 +1,611 @@
+/*
+ * 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/context.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->ObjPtr;
+   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->TexCoordPtr[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 */
+};