svn merge ^/branches/released .

1 files changed, 486 insertions, 486 deletions

diff --git a/mesalib/src/mesa/tnl/t_rasterpos.c b/mesalib/src/mesa/tnl/t_rasterpos.c
index d82d5b507..78aa8880f 100644
--- a/mesalib/src/mesa/tnl/t_rasterpos.c
+++ b/mesalib/src/mesa/tnl/t_rasterpos.c
@@ -1,486 +1,486 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.1
- *
- * Copyright (C) 1999-2007  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.
- */
-
-
-#include "main/glheader.h"
-#include "main/colormac.h"
-#include "main/feedback.h"
-#include "main/light.h"
-#include "main/macros.h"
-#include "main/simple_list.h"
-#include "main/mtypes.h"
-
-#include "math/m_matrix.h"
-#include "tnl/tnl.h"
-
-
-
-/**
- * Clip a point against the view volume.
- *
- * \param v vertex vector describing the point to clip.
- * 
- * \return zero if outside view volume, or one if inside.
- */
-static GLuint
-viewclip_point_xy( const GLfloat v[] )
-{
-   if (   v[0] > v[3] || v[0] < -v[3]
-       || v[1] > v[3] || v[1] < -v[3] ) {
-      return 0;
-   }
-   else {
-      return 1;
-   }
-}
-
-
-/**
- * Clip a point against the far/near Z clipping planes.
- *
- * \param v vertex vector describing the point to clip.
- * 
- * \return zero if outside view volume, or one if inside.
- */
-static GLuint
-viewclip_point_z( const GLfloat v[] )
-{
-   if (v[2] > v[3] || v[2] < -v[3] ) {
-      return 0;
-   }
-   else {
-      return 1;
-   }
-}
-
-
-/**
- * Clip a point against the user clipping planes.
- * 
- * \param ctx GL context.
- * \param v vertex vector describing the point to clip.
- * 
- * \return zero if the point was clipped, or one otherwise.
- */
-static GLuint
-userclip_point( GLcontext *ctx, const GLfloat v[] )
-{
-   GLuint p;
-
-   for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
-      if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
-	 GLfloat dot = v[0] * ctx->Transform._ClipUserPlane[p][0]
-		     + v[1] * ctx->Transform._ClipUserPlane[p][1]
-		     + v[2] * ctx->Transform._ClipUserPlane[p][2]
-		     + v[3] * ctx->Transform._ClipUserPlane[p][3];
-         if (dot < 0.0F) {
-            return 0;
-         }
-      }
-   }
-
-   return 1;
-}
-
-
-/**
- * Compute lighting for the raster position.  Both RGB and CI modes computed.
- * \param ctx the context
- * \param vertex vertex location
- * \param normal normal vector
- * \param Rcolor returned color
- * \param Rspec returned specular color (if separate specular enabled)
- * \param Rindex returned color index
- */
-static void
-shade_rastpos(GLcontext *ctx,
-              const GLfloat vertex[4],
-              const GLfloat normal[3],
-              GLfloat Rcolor[4],
-              GLfloat Rspec[4])
-{
-   /*const*/ GLfloat (*base)[3] = ctx->Light._BaseColor;
-   const struct gl_light *light;
-   GLfloat diffuseColor[4], specularColor[4];  /* for RGB mode only */
-   GLfloat diffuseCI = 0.0, specularCI = 0.0;  /* for CI mode only */
-
-   _mesa_validate_all_lighting_tables( ctx );
-
-   COPY_3V(diffuseColor, base[0]);
-   diffuseColor[3] = CLAMP( 
-      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3], 0.0F, 1.0F );
-   ASSIGN_4V(specularColor, 0.0, 0.0, 0.0, 1.0);
-
-   foreach (light, &ctx->Light.EnabledList) {
-      GLfloat attenuation = 1.0;
-      GLfloat VP[3]; /* vector from vertex to light pos */
-      GLfloat n_dot_VP;
-      GLfloat diffuseContrib[3], specularContrib[3];
-
-      if (!(light->_Flags & LIGHT_POSITIONAL)) {
-         /* light at infinity */
-	 COPY_3V(VP, light->_VP_inf_norm);
-	 attenuation = light->_VP_inf_spot_attenuation;
-      }
-      else {
-         /* local/positional light */
-	 GLfloat d;
-
-         /* VP = vector from vertex pos to light[i].pos */
-	 SUB_3V(VP, light->_Position, vertex);
-         /* d = length(VP) */
-	 d = (GLfloat) LEN_3FV( VP );
-	 if (d > 1.0e-6) {
-            /* normalize VP */
-	    GLfloat invd = 1.0F / d;
-	    SELF_SCALE_SCALAR_3V(VP, invd);
-	 }
-
-         /* atti */
-	 attenuation = 1.0F / (light->ConstantAttenuation + d *
-			       (light->LinearAttenuation + d *
-				light->QuadraticAttenuation));
-
-	 if (light->_Flags & LIGHT_SPOT) {
-	    GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection);
-
-	    if (PV_dot_dir<light->_CosCutoff) {
-	       continue;
-	    }
-	    else {
-	       double x = PV_dot_dir * (EXP_TABLE_SIZE-1);
-	       int k = (int) x;
-	       GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]
-			       + (x-k)*light->_SpotExpTable[k][1]);
-	       attenuation *= spot;
-	    }
-	 }
-      }
-
-      if (attenuation < 1e-3)
-	 continue;
-
-      n_dot_VP = DOT3( normal, VP );
-
-      if (n_dot_VP < 0.0F) {
-	 ACC_SCALE_SCALAR_3V(diffuseColor, attenuation, light->_MatAmbient[0]);
-	 continue;
-      }
-
-      /* Ambient + diffuse */
-      COPY_3V(diffuseContrib, light->_MatAmbient[0]);
-      ACC_SCALE_SCALAR_3V(diffuseContrib, n_dot_VP, light->_MatDiffuse[0]);
-      diffuseCI += n_dot_VP * light->_dli * attenuation;
-
-      /* Specular */
-      {
-         const GLfloat *h;
-         GLfloat n_dot_h;
-
-         ASSIGN_3V(specularContrib, 0.0, 0.0, 0.0);
-
-	 if (ctx->Light.Model.LocalViewer) {
-	    GLfloat v[3];
-	    COPY_3V(v, vertex);
-	    NORMALIZE_3FV(v);
-	    SUB_3V(VP, VP, v);
-            NORMALIZE_3FV(VP);
-	    h = VP;
-	 }
-	 else if (light->_Flags & LIGHT_POSITIONAL) {
-	    ACC_3V(VP, ctx->_EyeZDir);
-            NORMALIZE_3FV(VP);
-	    h = VP;
-	 }
-         else {
-	    h = light->_h_inf_norm;
-	 }
-
-	 n_dot_h = DOT3(normal, h);
-
-	 if (n_dot_h > 0.0F) {
-	    GLfloat spec_coef;
-	    GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec_coef );
-
-	    if (spec_coef > 1.0e-10) {
-               if (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) {
-                  ACC_SCALE_SCALAR_3V( specularContrib, spec_coef,
-                                       light->_MatSpecular[0]);
-               }
-               else {
-                  ACC_SCALE_SCALAR_3V( diffuseContrib, spec_coef,
-                                       light->_MatSpecular[0]);
-               }
-               /*assert(light->_sli > 0.0);*/
-               specularCI += spec_coef * light->_sli * attenuation;
-	    }
-	 }
-      }
-
-      ACC_SCALE_SCALAR_3V( diffuseColor, attenuation, diffuseContrib );
-      ACC_SCALE_SCALAR_3V( specularColor, attenuation, specularContrib );
-   }
-
-   Rcolor[0] = CLAMP(diffuseColor[0], 0.0F, 1.0F);
-   Rcolor[1] = CLAMP(diffuseColor[1], 0.0F, 1.0F);
-   Rcolor[2] = CLAMP(diffuseColor[2], 0.0F, 1.0F);
-   Rcolor[3] = CLAMP(diffuseColor[3], 0.0F, 1.0F);
-   Rspec[0] = CLAMP(specularColor[0], 0.0F, 1.0F);
-   Rspec[1] = CLAMP(specularColor[1], 0.0F, 1.0F);
-   Rspec[2] = CLAMP(specularColor[2], 0.0F, 1.0F);
-   Rspec[3] = CLAMP(specularColor[3], 0.0F, 1.0F);
-}
-
-
-/**
- * Do texgen needed for glRasterPos.
- * \param ctx  rendering context
- * \param vObj  object-space vertex coordinate
- * \param vEye  eye-space vertex coordinate
- * \param normal  vertex normal
- * \param unit  texture unit number
- * \param texcoord  incoming texcoord and resulting texcoord
- */
-static void
-compute_texgen(GLcontext *ctx, const GLfloat vObj[4], const GLfloat vEye[4],
-               const GLfloat normal[3], GLuint unit, GLfloat texcoord[4])
-{
-   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
-
-   /* always compute sphere map terms, just in case */
-   GLfloat u[3], two_nu, rx, ry, rz, m, mInv;
-   COPY_3V(u, vEye);
-   NORMALIZE_3FV(u);
-   two_nu = 2.0F * DOT3(normal, u);
-   rx = u[0] - normal[0] * two_nu;
-   ry = u[1] - normal[1] * two_nu;
-   rz = u[2] - normal[2] * two_nu;
-   m = rx * rx + ry * ry + (rz + 1.0F) * (rz + 1.0F);
-   if (m > 0.0F)
-      mInv = 0.5F * _mesa_inv_sqrtf(m);
-   else
-      mInv = 0.0F;
-
-   if (texUnit->TexGenEnabled & S_BIT) {
-      switch (texUnit->GenS.Mode) {
-         case GL_OBJECT_LINEAR:
-            texcoord[0] = DOT4(vObj, texUnit->GenS.ObjectPlane);
-            break;
-         case GL_EYE_LINEAR:
-            texcoord[0] = DOT4(vEye, texUnit->GenS.EyePlane);
-            break;
-         case GL_SPHERE_MAP:
-            texcoord[0] = rx * mInv + 0.5F;
-            break;
-         case GL_REFLECTION_MAP:
-            texcoord[0] = rx;
-            break;
-         case GL_NORMAL_MAP:
-            texcoord[0] = normal[0];
-            break;
-         default:
-            _mesa_problem(ctx, "Bad S texgen in compute_texgen()");
-            return;
-      }
-   }
-
-   if (texUnit->TexGenEnabled & T_BIT) {
-      switch (texUnit->GenT.Mode) {
-         case GL_OBJECT_LINEAR:
-            texcoord[1] = DOT4(vObj, texUnit->GenT.ObjectPlane);
-            break;
-         case GL_EYE_LINEAR:
-            texcoord[1] = DOT4(vEye, texUnit->GenT.EyePlane);
-            break;
-         case GL_SPHERE_MAP:
-            texcoord[1] = ry * mInv + 0.5F;
-            break;
-         case GL_REFLECTION_MAP:
-            texcoord[1] = ry;
-            break;
-         case GL_NORMAL_MAP:
-            texcoord[1] = normal[1];
-            break;
-         default:
-            _mesa_problem(ctx, "Bad T texgen in compute_texgen()");
-            return;
-      }
-   }
-
-   if (texUnit->TexGenEnabled & R_BIT) {
-      switch (texUnit->GenR.Mode) {
-         case GL_OBJECT_LINEAR:
-            texcoord[2] = DOT4(vObj, texUnit->GenR.ObjectPlane);
-            break;
-         case GL_EYE_LINEAR:
-            texcoord[2] = DOT4(vEye, texUnit->GenR.EyePlane);
-            break;
-         case GL_REFLECTION_MAP:
-            texcoord[2] = rz;
-            break;
-         case GL_NORMAL_MAP:
-            texcoord[2] = normal[2];
-            break;
-         default:
-            _mesa_problem(ctx, "Bad R texgen in compute_texgen()");
-            return;
-      }
-   }
-
-   if (texUnit->TexGenEnabled & Q_BIT) {
-      switch (texUnit->GenQ.Mode) {
-         case GL_OBJECT_LINEAR:
-            texcoord[3] = DOT4(vObj, texUnit->GenQ.ObjectPlane);
-            break;
-         case GL_EYE_LINEAR:
-            texcoord[3] = DOT4(vEye, texUnit->GenQ.EyePlane);
-            break;
-         default:
-            _mesa_problem(ctx, "Bad Q texgen in compute_texgen()");
-            return;
-      }
-   }
-}
-
-
-/**
- * glRasterPos transformation.  Typically called via ctx->Driver.RasterPos().
- * XXX some of this code (such as viewport xform, clip testing and setting
- * of ctx->Current.Raster* fields) could get lifted up into the
- * main/rasterpos.c code.
- *
- * \param vObj  vertex position in object space
- */
-void
-_tnl_RasterPos(GLcontext *ctx, const GLfloat vObj[4])
-{
-   if (ctx->VertexProgram._Enabled) {
-      /* XXX implement this */
-      _mesa_problem(ctx, "Vertex programs not implemented for glRasterPos");
-      return;
-   }
-   else {
-      GLfloat eye[4], clip[4], ndc[3], d;
-      GLfloat *norm, eyenorm[3];
-      GLfloat *objnorm = ctx->Current.Attrib[VERT_ATTRIB_NORMAL];
-
-      /* apply modelview matrix:  eye = MV * obj */
-      TRANSFORM_POINT( eye, ctx->ModelviewMatrixStack.Top->m, vObj );
-      /* apply projection matrix:  clip = Proj * eye */
-      TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye );
-
-      /* clip to view volume. */
-      if (!ctx->Transform.DepthClamp) {
-         if (viewclip_point_z(clip) == 0) {
-            ctx->Current.RasterPosValid = GL_FALSE;
-            return;
-         }
-      }
-      if (!ctx->Transform.RasterPositionUnclipped) {
-         if (viewclip_point_xy(clip) == 0) {
-            ctx->Current.RasterPosValid = GL_FALSE;
-            return;
-         }
-      }
-
-      /* clip to user clipping planes */
-      if (ctx->Transform.ClipPlanesEnabled && !userclip_point(ctx, clip)) {
-         ctx->Current.RasterPosValid = GL_FALSE;
-         return;
-      }
-
-      /* ndc = clip / W */
-      d = (clip[3] == 0.0F) ? 1.0F : 1.0F / clip[3];
-      ndc[0] = clip[0] * d;
-      ndc[1] = clip[1] * d;
-      ndc[2] = clip[2] * d;
-      /* wincoord = viewport_mapping(ndc) */
-      ctx->Current.RasterPos[0] = (ndc[0] * ctx->Viewport._WindowMap.m[MAT_SX]
-                                   + ctx->Viewport._WindowMap.m[MAT_TX]);
-      ctx->Current.RasterPos[1] = (ndc[1] * ctx->Viewport._WindowMap.m[MAT_SY]
-                                   + ctx->Viewport._WindowMap.m[MAT_TY]);
-      ctx->Current.RasterPos[2] = (ndc[2] * ctx->Viewport._WindowMap.m[MAT_SZ]
-                                   + ctx->Viewport._WindowMap.m[MAT_TZ])
-                                  / ctx->DrawBuffer->_DepthMaxF;
-      ctx->Current.RasterPos[3] = clip[3];
-
-      if (ctx->Transform.DepthClamp) {
-	 ctx->Current.RasterPos[3] = CLAMP(ctx->Current.RasterPos[3],
-					   ctx->Viewport.Near,
-					   ctx->Viewport.Far);
-      }
-
-      /* compute raster distance */
-      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
-         ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];
-      else
-         ctx->Current.RasterDistance =
-                        SQRTF( eye[0]*eye[0] + eye[1]*eye[1] + eye[2]*eye[2] );
-
-      /* compute transformed normal vector (for lighting or texgen) */
-      if (ctx->_NeedEyeCoords) {
-         const GLfloat *inv = ctx->ModelviewMatrixStack.Top->inv;
-         TRANSFORM_NORMAL( eyenorm, objnorm, inv );
-         norm = eyenorm;
-      }
-      else {
-         norm = objnorm;
-      }
-
-      /* update raster color */
-      if (ctx->Light.Enabled) {
-         /* lighting */
-         shade_rastpos( ctx, vObj, norm,
-                        ctx->Current.RasterColor,
-                        ctx->Current.RasterSecondaryColor );
-      }
-      else {
-         /* use current color */
-	 COPY_4FV(ctx->Current.RasterColor,
-		  ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
-	 COPY_4FV(ctx->Current.RasterSecondaryColor,
-		  ctx->Current.Attrib[VERT_ATTRIB_COLOR1]);
-      }
-
-      /* texture coords */
-      {
-         GLuint u;
-         for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) {
-            GLfloat tc[4];
-            COPY_4V(tc, ctx->Current.Attrib[VERT_ATTRIB_TEX0 + u]);
-            if (ctx->Texture.Unit[u].TexGenEnabled) {
-               compute_texgen(ctx, vObj, eye, norm, u, tc);
-            }
-            TRANSFORM_POINT(ctx->Current.RasterTexCoords[u],
-                            ctx->TextureMatrixStack[u].Top->m, tc);
-         }
-      }
-
-      ctx->Current.RasterPosValid = GL_TRUE;
-   }
-
-   if (ctx->RenderMode == GL_SELECT) {
-      _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
-   }
-}
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.1

+ *

+ * Copyright (C) 1999-2007  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.

+ */

+

+

+#include "main/glheader.h"

+#include "main/colormac.h"

+#include "main/feedback.h"

+#include "main/light.h"

+#include "main/macros.h"

+#include "main/simple_list.h"

+#include "main/mtypes.h"

+

+#include "math/m_matrix.h"

+#include "tnl/tnl.h"

+

+

+

+/**

+ * Clip a point against the view volume.

+ *

+ * \param v vertex vector describing the point to clip.

+ * 

+ * \return zero if outside view volume, or one if inside.

+ */

+static GLuint

+viewclip_point_xy( const GLfloat v[] )

+{

+   if (   v[0] > v[3] || v[0] < -v[3]

+       || v[1] > v[3] || v[1] < -v[3] ) {

+      return 0;

+   }

+   else {

+      return 1;

+   }

+}

+

+

+/**

+ * Clip a point against the far/near Z clipping planes.

+ *

+ * \param v vertex vector describing the point to clip.

+ * 

+ * \return zero if outside view volume, or one if inside.

+ */

+static GLuint

+viewclip_point_z( const GLfloat v[] )

+{

+   if (v[2] > v[3] || v[2] < -v[3] ) {

+      return 0;

+   }

+   else {

+      return 1;

+   }

+}

+

+

+/**

+ * Clip a point against the user clipping planes.

+ * 

+ * \param ctx GL context.

+ * \param v vertex vector describing the point to clip.

+ * 

+ * \return zero if the point was clipped, or one otherwise.

+ */

+static GLuint

+userclip_point( struct gl_context *ctx, const GLfloat v[] )

+{

+   GLuint p;

+

+   for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {

+      if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {

+	 GLfloat dot = v[0] * ctx->Transform._ClipUserPlane[p][0]

+		     + v[1] * ctx->Transform._ClipUserPlane[p][1]

+		     + v[2] * ctx->Transform._ClipUserPlane[p][2]

+		     + v[3] * ctx->Transform._ClipUserPlane[p][3];

+         if (dot < 0.0F) {

+            return 0;

+         }

+      }

+   }

+

+   return 1;

+}

+

+

+/**

+ * Compute lighting for the raster position.  Both RGB and CI modes computed.

+ * \param ctx the context

+ * \param vertex vertex location

+ * \param normal normal vector

+ * \param Rcolor returned color

+ * \param Rspec returned specular color (if separate specular enabled)

+ * \param Rindex returned color index

+ */

+static void

+shade_rastpos(struct gl_context *ctx,

+              const GLfloat vertex[4],

+              const GLfloat normal[3],

+              GLfloat Rcolor[4],

+              GLfloat Rspec[4])

+{

+   /*const*/ GLfloat (*base)[3] = ctx->Light._BaseColor;

+   const struct gl_light *light;

+   GLfloat diffuseColor[4], specularColor[4];  /* for RGB mode only */

+   GLfloat diffuseCI = 0.0, specularCI = 0.0;  /* for CI mode only */

+

+   _mesa_validate_all_lighting_tables( ctx );

+

+   COPY_3V(diffuseColor, base[0]);

+   diffuseColor[3] = CLAMP( 

+      ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3], 0.0F, 1.0F );

+   ASSIGN_4V(specularColor, 0.0, 0.0, 0.0, 1.0);

+

+   foreach (light, &ctx->Light.EnabledList) {

+      GLfloat attenuation = 1.0;

+      GLfloat VP[3]; /* vector from vertex to light pos */

+      GLfloat n_dot_VP;

+      GLfloat diffuseContrib[3], specularContrib[3];

+

+      if (!(light->_Flags & LIGHT_POSITIONAL)) {

+         /* light at infinity */

+	 COPY_3V(VP, light->_VP_inf_norm);

+	 attenuation = light->_VP_inf_spot_attenuation;

+      }

+      else {

+         /* local/positional light */

+	 GLfloat d;

+

+         /* VP = vector from vertex pos to light[i].pos */

+	 SUB_3V(VP, light->_Position, vertex);

+         /* d = length(VP) */

+	 d = (GLfloat) LEN_3FV( VP );

+	 if (d > 1.0e-6) {

+            /* normalize VP */

+	    GLfloat invd = 1.0F / d;

+	    SELF_SCALE_SCALAR_3V(VP, invd);

+	 }

+

+         /* atti */

+	 attenuation = 1.0F / (light->ConstantAttenuation + d *

+			       (light->LinearAttenuation + d *

+				light->QuadraticAttenuation));

+

+	 if (light->_Flags & LIGHT_SPOT) {

+	    GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection);

+

+	    if (PV_dot_dir<light->_CosCutoff) {

+	       continue;

+	    }

+	    else {

+	       double x = PV_dot_dir * (EXP_TABLE_SIZE-1);

+	       int k = (int) x;

+	       GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]

+			       + (x-k)*light->_SpotExpTable[k][1]);

+	       attenuation *= spot;

+	    }

+	 }

+      }

+

+      if (attenuation < 1e-3)

+	 continue;

+

+      n_dot_VP = DOT3( normal, VP );

+

+      if (n_dot_VP < 0.0F) {

+	 ACC_SCALE_SCALAR_3V(diffuseColor, attenuation, light->_MatAmbient[0]);

+	 continue;

+      }

+

+      /* Ambient + diffuse */

+      COPY_3V(diffuseContrib, light->_MatAmbient[0]);

+      ACC_SCALE_SCALAR_3V(diffuseContrib, n_dot_VP, light->_MatDiffuse[0]);

+      diffuseCI += n_dot_VP * light->_dli * attenuation;

+

+      /* Specular */

+      {

+         const GLfloat *h;

+         GLfloat n_dot_h;

+

+         ASSIGN_3V(specularContrib, 0.0, 0.0, 0.0);

+

+	 if (ctx->Light.Model.LocalViewer) {

+	    GLfloat v[3];

+	    COPY_3V(v, vertex);

+	    NORMALIZE_3FV(v);

+	    SUB_3V(VP, VP, v);

+            NORMALIZE_3FV(VP);

+	    h = VP;

+	 }

+	 else if (light->_Flags & LIGHT_POSITIONAL) {

+	    ACC_3V(VP, ctx->_EyeZDir);

+            NORMALIZE_3FV(VP);

+	    h = VP;

+	 }

+         else {

+	    h = light->_h_inf_norm;

+	 }

+

+	 n_dot_h = DOT3(normal, h);

+

+	 if (n_dot_h > 0.0F) {

+	    GLfloat spec_coef;

+	    GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec_coef );

+

+	    if (spec_coef > 1.0e-10) {

+               if (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) {

+                  ACC_SCALE_SCALAR_3V( specularContrib, spec_coef,

+                                       light->_MatSpecular[0]);

+               }

+               else {

+                  ACC_SCALE_SCALAR_3V( diffuseContrib, spec_coef,

+                                       light->_MatSpecular[0]);

+               }

+               /*assert(light->_sli > 0.0);*/

+               specularCI += spec_coef * light->_sli * attenuation;

+	    }

+	 }

+      }

+

+      ACC_SCALE_SCALAR_3V( diffuseColor, attenuation, diffuseContrib );

+      ACC_SCALE_SCALAR_3V( specularColor, attenuation, specularContrib );

+   }

+

+   Rcolor[0] = CLAMP(diffuseColor[0], 0.0F, 1.0F);

+   Rcolor[1] = CLAMP(diffuseColor[1], 0.0F, 1.0F);

+   Rcolor[2] = CLAMP(diffuseColor[2], 0.0F, 1.0F);

+   Rcolor[3] = CLAMP(diffuseColor[3], 0.0F, 1.0F);

+   Rspec[0] = CLAMP(specularColor[0], 0.0F, 1.0F);

+   Rspec[1] = CLAMP(specularColor[1], 0.0F, 1.0F);

+   Rspec[2] = CLAMP(specularColor[2], 0.0F, 1.0F);

+   Rspec[3] = CLAMP(specularColor[3], 0.0F, 1.0F);

+}

+

+

+/**

+ * Do texgen needed for glRasterPos.

+ * \param ctx  rendering context

+ * \param vObj  object-space vertex coordinate

+ * \param vEye  eye-space vertex coordinate

+ * \param normal  vertex normal

+ * \param unit  texture unit number

+ * \param texcoord  incoming texcoord and resulting texcoord

+ */

+static void

+compute_texgen(struct gl_context *ctx, const GLfloat vObj[4], const GLfloat vEye[4],

+               const GLfloat normal[3], GLuint unit, GLfloat texcoord[4])

+{

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

+

+   /* always compute sphere map terms, just in case */

+   GLfloat u[3], two_nu, rx, ry, rz, m, mInv;

+   COPY_3V(u, vEye);

+   NORMALIZE_3FV(u);

+   two_nu = 2.0F * DOT3(normal, u);

+   rx = u[0] - normal[0] * two_nu;

+   ry = u[1] - normal[1] * two_nu;

+   rz = u[2] - normal[2] * two_nu;

+   m = rx * rx + ry * ry + (rz + 1.0F) * (rz + 1.0F);

+   if (m > 0.0F)

+      mInv = 0.5F * _mesa_inv_sqrtf(m);

+   else

+      mInv = 0.0F;

+

+   if (texUnit->TexGenEnabled & S_BIT) {

+      switch (texUnit->GenS.Mode) {

+         case GL_OBJECT_LINEAR:

+            texcoord[0] = DOT4(vObj, texUnit->GenS.ObjectPlane);

+            break;

+         case GL_EYE_LINEAR:

+            texcoord[0] = DOT4(vEye, texUnit->GenS.EyePlane);

+            break;

+         case GL_SPHERE_MAP:

+            texcoord[0] = rx * mInv + 0.5F;

+            break;

+         case GL_REFLECTION_MAP:

+            texcoord[0] = rx;

+            break;

+         case GL_NORMAL_MAP:

+            texcoord[0] = normal[0];

+            break;

+         default:

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

+            return;

+      }

+   }

+

+   if (texUnit->TexGenEnabled & T_BIT) {

+      switch (texUnit->GenT.Mode) {

+         case GL_OBJECT_LINEAR:

+            texcoord[1] = DOT4(vObj, texUnit->GenT.ObjectPlane);

+            break;

+         case GL_EYE_LINEAR:

+            texcoord[1] = DOT4(vEye, texUnit->GenT.EyePlane);

+            break;

+         case GL_SPHERE_MAP:

+            texcoord[1] = ry * mInv + 0.5F;

+            break;

+         case GL_REFLECTION_MAP:

+            texcoord[1] = ry;

+            break;

+         case GL_NORMAL_MAP:

+            texcoord[1] = normal[1];

+            break;

+         default:

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

+            return;

+      }

+   }

+

+   if (texUnit->TexGenEnabled & R_BIT) {

+      switch (texUnit->GenR.Mode) {

+         case GL_OBJECT_LINEAR:

+            texcoord[2] = DOT4(vObj, texUnit->GenR.ObjectPlane);

+            break;

+         case GL_EYE_LINEAR:

+            texcoord[2] = DOT4(vEye, texUnit->GenR.EyePlane);

+            break;

+         case GL_REFLECTION_MAP:

+            texcoord[2] = rz;

+            break;

+         case GL_NORMAL_MAP:

+            texcoord[2] = normal[2];

+            break;

+         default:

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

+            return;

+      }

+   }

+

+   if (texUnit->TexGenEnabled & Q_BIT) {

+      switch (texUnit->GenQ.Mode) {

+         case GL_OBJECT_LINEAR:

+            texcoord[3] = DOT4(vObj, texUnit->GenQ.ObjectPlane);

+            break;

+         case GL_EYE_LINEAR:

+            texcoord[3] = DOT4(vEye, texUnit->GenQ.EyePlane);

+            break;

+         default:

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

+            return;

+      }

+   }

+}

+

+

+/**

+ * glRasterPos transformation.  Typically called via ctx->Driver.RasterPos().

+ * XXX some of this code (such as viewport xform, clip testing and setting

+ * of ctx->Current.Raster* fields) could get lifted up into the

+ * main/rasterpos.c code.

+ *

+ * \param vObj  vertex position in object space

+ */

+void

+_tnl_RasterPos(struct gl_context *ctx, const GLfloat vObj[4])

+{

+   if (ctx->VertexProgram._Enabled) {

+      /* XXX implement this */

+      _mesa_problem(ctx, "Vertex programs not implemented for glRasterPos");

+      return;

+   }

+   else {

+      GLfloat eye[4], clip[4], ndc[3], d;

+      GLfloat *norm, eyenorm[3];

+      GLfloat *objnorm = ctx->Current.Attrib[VERT_ATTRIB_NORMAL];

+

+      /* apply modelview matrix:  eye = MV * obj */

+      TRANSFORM_POINT( eye, ctx->ModelviewMatrixStack.Top->m, vObj );

+      /* apply projection matrix:  clip = Proj * eye */

+      TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye );

+

+      /* clip to view volume. */

+      if (!ctx->Transform.DepthClamp) {

+         if (viewclip_point_z(clip) == 0) {

+            ctx->Current.RasterPosValid = GL_FALSE;

+            return;

+         }

+      }

+      if (!ctx->Transform.RasterPositionUnclipped) {

+         if (viewclip_point_xy(clip) == 0) {

+            ctx->Current.RasterPosValid = GL_FALSE;

+            return;

+         }

+      }

+

+      /* clip to user clipping planes */

+      if (ctx->Transform.ClipPlanesEnabled && !userclip_point(ctx, clip)) {

+         ctx->Current.RasterPosValid = GL_FALSE;

+         return;

+      }

+

+      /* ndc = clip / W */

+      d = (clip[3] == 0.0F) ? 1.0F : 1.0F / clip[3];

+      ndc[0] = clip[0] * d;

+      ndc[1] = clip[1] * d;

+      ndc[2] = clip[2] * d;

+      /* wincoord = viewport_mapping(ndc) */

+      ctx->Current.RasterPos[0] = (ndc[0] * ctx->Viewport._WindowMap.m[MAT_SX]

+                                   + ctx->Viewport._WindowMap.m[MAT_TX]);

+      ctx->Current.RasterPos[1] = (ndc[1] * ctx->Viewport._WindowMap.m[MAT_SY]

+                                   + ctx->Viewport._WindowMap.m[MAT_TY]);

+      ctx->Current.RasterPos[2] = (ndc[2] * ctx->Viewport._WindowMap.m[MAT_SZ]

+                                   + ctx->Viewport._WindowMap.m[MAT_TZ])

+                                  / ctx->DrawBuffer->_DepthMaxF;

+      ctx->Current.RasterPos[3] = clip[3];

+

+      if (ctx->Transform.DepthClamp) {

+	 ctx->Current.RasterPos[3] = CLAMP(ctx->Current.RasterPos[3],

+					   ctx->Viewport.Near,

+					   ctx->Viewport.Far);

+      }

+

+      /* compute raster distance */

+      if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)

+         ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];

+      else

+         ctx->Current.RasterDistance =

+                        SQRTF( eye[0]*eye[0] + eye[1]*eye[1] + eye[2]*eye[2] );

+

+      /* compute transformed normal vector (for lighting or texgen) */

+      if (ctx->_NeedEyeCoords) {

+         const GLfloat *inv = ctx->ModelviewMatrixStack.Top->inv;

+         TRANSFORM_NORMAL( eyenorm, objnorm, inv );

+         norm = eyenorm;

+      }

+      else {

+         norm = objnorm;

+      }

+

+      /* update raster color */

+      if (ctx->Light.Enabled) {

+         /* lighting */

+         shade_rastpos( ctx, vObj, norm,

+                        ctx->Current.RasterColor,

+                        ctx->Current.RasterSecondaryColor );

+      }

+      else {

+         /* use current color */

+	 COPY_4FV(ctx->Current.RasterColor,

+		  ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);

+	 COPY_4FV(ctx->Current.RasterSecondaryColor,

+		  ctx->Current.Attrib[VERT_ATTRIB_COLOR1]);

+      }

+

+      /* texture coords */

+      {

+         GLuint u;

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

+            GLfloat tc[4];

+            COPY_4V(tc, ctx->Current.Attrib[VERT_ATTRIB_TEX0 + u]);

+            if (ctx->Texture.Unit[u].TexGenEnabled) {

+               compute_texgen(ctx, vObj, eye, norm, u, tc);

+            }

+            TRANSFORM_POINT(ctx->Current.RasterTexCoords[u],

+                            ctx->TextureMatrixStack[u].Top->m, tc);

+         }

+      }

+

+      ctx->Current.RasterPosValid = GL_TRUE;

+   }

+

+   if (ctx->RenderMode == GL_SELECT) {

+      _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );

+   }

+}