Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 3271 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/main/texstate.c b/nx-X11/extras/Mesa/src/mesa/main/texstate.c
new file mode 100644
index 000000000..8ac41a277
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/main/texstate.c
@@ -0,0 +1,3271 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5
+ *
+ * Copyright (C) 1999-2005  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.
+ */
+
+/** 
+ * \file texstate.c
+ *
+ * Texture state handling.
+ */
+
+#include "glheader.h"
+#include "colormac.h"
+#include "colortab.h"
+#include "context.h"
+#include "enums.h"
+#include "extensions.h"
+#include "macros.h"
+#include "nvfragprog.h"
+#include "texobj.h"
+#include "teximage.h"
+#include "texstate.h"
+#include "texenvprogram.h"
+#include "mtypes.h"
+#include "math/m_xform.h"
+#include "math/m_matrix.h"
+
+
+
+#ifdef SPECIALCAST
+/* Needed for an Amiga compiler */
+#define ENUM_TO_FLOAT(X) ((GLfloat)(GLint)(X))
+#define ENUM_TO_DOUBLE(X) ((GLdouble)(GLint)(X))
+#else
+/* all other compilers */
+#define ENUM_TO_FLOAT(X) ((GLfloat)(X))
+#define ENUM_TO_DOUBLE(X) ((GLdouble)(X))
+#endif
+
+/**
+ * Default texture combine environment state.  This is used to initialize
+ * a context's texture units and as the basis for converting "classic"
+ * texture environmnets to ARB_texture_env_combine style values.
+ */
+static const struct gl_tex_env_combine_state default_combine_state = {
+   GL_MODULATE, GL_MODULATE,
+   { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT },
+   { GL_TEXTURE, GL_PREVIOUS, GL_CONSTANT },
+   { GL_SRC_COLOR, GL_SRC_COLOR, GL_SRC_ALPHA },
+   { GL_SRC_ALPHA, GL_SRC_ALPHA, GL_SRC_ALPHA },
+   0, 0,
+   2, 2
+};
+
+
+void
+_mesa_copy_texture_state( const GLcontext *src, GLcontext *dst )
+{
+   GLuint i;
+
+   ASSERT(src);
+   ASSERT(dst);
+
+   dst->Texture.CurrentUnit = src->Texture.CurrentUnit;
+   dst->Texture._GenFlags = src->Texture._GenFlags;
+   dst->Texture._TexGenEnabled = src->Texture._TexGenEnabled;
+   dst->Texture._TexMatEnabled = src->Texture._TexMatEnabled;
+   dst->Texture.SharedPalette = src->Texture.SharedPalette;
+
+   /* per-unit state */
+   for (i = 0; i < src->Const.MaxTextureUnits; i++) {
+      dst->Texture.Unit[i].Enabled = src->Texture.Unit[i].Enabled;
+      dst->Texture.Unit[i].EnvMode = src->Texture.Unit[i].EnvMode;
+      COPY_4V(dst->Texture.Unit[i].EnvColor, src->Texture.Unit[i].EnvColor);
+      dst->Texture.Unit[i].TexGenEnabled = src->Texture.Unit[i].TexGenEnabled;
+      dst->Texture.Unit[i].GenModeS = src->Texture.Unit[i].GenModeS;
+      dst->Texture.Unit[i].GenModeT = src->Texture.Unit[i].GenModeT;
+      dst->Texture.Unit[i].GenModeR = src->Texture.Unit[i].GenModeR;
+      dst->Texture.Unit[i].GenModeQ = src->Texture.Unit[i].GenModeQ;
+      dst->Texture.Unit[i]._GenBitS = src->Texture.Unit[i]._GenBitS;
+      dst->Texture.Unit[i]._GenBitT = src->Texture.Unit[i]._GenBitT;
+      dst->Texture.Unit[i]._GenBitR = src->Texture.Unit[i]._GenBitR;
+      dst->Texture.Unit[i]._GenBitQ = src->Texture.Unit[i]._GenBitQ;
+      dst->Texture.Unit[i]._GenFlags = src->Texture.Unit[i]._GenFlags;
+      COPY_4V(dst->Texture.Unit[i].ObjectPlaneS, src->Texture.Unit[i].ObjectPlaneS);
+      COPY_4V(dst->Texture.Unit[i].ObjectPlaneT, src->Texture.Unit[i].ObjectPlaneT);
+      COPY_4V(dst->Texture.Unit[i].ObjectPlaneR, src->Texture.Unit[i].ObjectPlaneR);
+      COPY_4V(dst->Texture.Unit[i].ObjectPlaneQ, src->Texture.Unit[i].ObjectPlaneQ);
+      COPY_4V(dst->Texture.Unit[i].EyePlaneS, src->Texture.Unit[i].EyePlaneS);
+      COPY_4V(dst->Texture.Unit[i].EyePlaneT, src->Texture.Unit[i].EyePlaneT);
+      COPY_4V(dst->Texture.Unit[i].EyePlaneR, src->Texture.Unit[i].EyePlaneR);
+      COPY_4V(dst->Texture.Unit[i].EyePlaneQ, src->Texture.Unit[i].EyePlaneQ);
+      dst->Texture.Unit[i].LodBias = src->Texture.Unit[i].LodBias;
+
+      /* GL_EXT_texture_env_combine */
+      dst->Texture.Unit[i].Combine.ModeRGB = src->Texture.Unit[i].Combine.ModeRGB;
+      dst->Texture.Unit[i].Combine.ModeA = src->Texture.Unit[i].Combine.ModeA;
+      COPY_3V(dst->Texture.Unit[i].Combine.SourceRGB, src->Texture.Unit[i].Combine.SourceRGB);
+      COPY_3V(dst->Texture.Unit[i].Combine.SourceA, src->Texture.Unit[i].Combine.SourceA);
+      COPY_3V(dst->Texture.Unit[i].Combine.OperandRGB, src->Texture.Unit[i].Combine.OperandRGB);
+      COPY_3V(dst->Texture.Unit[i].Combine.OperandA, src->Texture.Unit[i].Combine.OperandA);
+      dst->Texture.Unit[i].Combine.ScaleShiftRGB = src->Texture.Unit[i].Combine.ScaleShiftRGB;
+      dst->Texture.Unit[i].Combine.ScaleShiftA = src->Texture.Unit[i].Combine.ScaleShiftA;
+
+      /* texture object state */
+      _mesa_copy_texture_object(dst->Texture.Unit[i].Current1D,
+                                src->Texture.Unit[i].Current1D);
+      _mesa_copy_texture_object(dst->Texture.Unit[i].Current2D,
+                                src->Texture.Unit[i].Current2D);
+      _mesa_copy_texture_object(dst->Texture.Unit[i].Current3D,
+                                src->Texture.Unit[i].Current3D);
+      _mesa_copy_texture_object(dst->Texture.Unit[i].CurrentCubeMap,
+                                src->Texture.Unit[i].CurrentCubeMap);
+      _mesa_copy_texture_object(dst->Texture.Unit[i].CurrentRect,
+                                src->Texture.Unit[i].CurrentRect);
+   }
+}
+
+
+/*
+ * For debugging
+ */
+void
+_mesa_print_texunit_state( GLcontext *ctx, GLuint unit )
+{
+   const struct gl_texture_unit *texUnit = ctx->Texture.Unit + unit;
+   _mesa_printf("Texture Unit %d\n", unit);
+   _mesa_printf("  GL_TEXTURE_ENV_MODE = %s\n", _mesa_lookup_enum_by_nr(texUnit->EnvMode));
+   _mesa_printf("  GL_COMBINE_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeRGB));
+   _mesa_printf("  GL_COMBINE_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.ModeA));
+   _mesa_printf("  GL_SOURCE0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[0]));
+   _mesa_printf("  GL_SOURCE1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[1]));
+   _mesa_printf("  GL_SOURCE2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceRGB[2]));
+   _mesa_printf("  GL_SOURCE0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[0]));
+   _mesa_printf("  GL_SOURCE1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[1]));
+   _mesa_printf("  GL_SOURCE2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.SourceA[2]));
+   _mesa_printf("  GL_OPERAND0_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[0]));
+   _mesa_printf("  GL_OPERAND1_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[1]));
+   _mesa_printf("  GL_OPERAND2_RGB = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandRGB[2]));
+   _mesa_printf("  GL_OPERAND0_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[0]));
+   _mesa_printf("  GL_OPERAND1_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[1]));
+   _mesa_printf("  GL_OPERAND2_ALPHA = %s\n", _mesa_lookup_enum_by_nr(texUnit->Combine.OperandA[2]));
+   _mesa_printf("  GL_RGB_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftRGB);
+   _mesa_printf("  GL_ALPHA_SCALE = %d\n", 1 << texUnit->Combine.ScaleShiftA);
+   _mesa_printf("  GL_TEXTURE_ENV_COLOR = (%f, %f, %f, %f)\n", texUnit->EnvColor[0], texUnit->EnvColor[1], texUnit->EnvColor[2], texUnit->EnvColor[3]);
+}
+
+
+
+/**********************************************************************/
+/*                       Texture Environment                          */
+/**********************************************************************/
+
+/**
+ * Convert "classic" texture environment to ARB_texture_env_combine style
+ * environments.
+ * 
+ * \param state  texture_env_combine state vector to be filled-in.
+ * \param mode   Classic texture environment mode (i.e., \c GL_REPLACE,
+ *               \c GL_BLEND, \c GL_DECAL, etc.).
+ * \param texBaseFormat  Base format of the texture associated with the
+ *               texture unit.
+ */
+static void
+calculate_derived_texenv( struct gl_tex_env_combine_state *state,
+			  GLenum mode, GLenum texBaseFormat )
+{
+   GLenum mode_rgb;
+   GLenum mode_a;
+
+   *state = default_combine_state;
+
+   switch (texBaseFormat) {
+   case GL_ALPHA:
+      state->SourceRGB[0] = GL_PREVIOUS;
+      break;
+
+   case GL_LUMINANCE_ALPHA:
+   case GL_INTENSITY:
+   case GL_RGBA:
+      break;
+
+   case GL_LUMINANCE:
+   case GL_RGB:
+   case GL_YCBCR_MESA:
+      state->SourceA[0] = GL_PREVIOUS;
+      break;
+      
+   default:
+      _mesa_problem(NULL, "Invalid texBaseFormat in calculate_derived_texenv");
+      return;
+   }
+
+   switch (mode) {
+   case GL_REPLACE:
+   case GL_MODULATE:
+      mode_rgb = (texBaseFormat == GL_ALPHA) ? GL_REPLACE : mode;
+      mode_a   = mode;
+      break;
+   
+   case GL_DECAL:
+      mode_rgb = GL_INTERPOLATE;
+      mode_a   = GL_REPLACE;
+
+      state->SourceA[0] = GL_PREVIOUS;
+
+      /* Having alpha / luminance / intensity textures replace using the
+       * incoming fragment color matches the definition in NV_texture_shader.
+       * The 1.5 spec simply marks these as "undefined".
+       */
+      switch (texBaseFormat) {
+      case GL_ALPHA:
+      case GL_LUMINANCE:
+      case GL_LUMINANCE_ALPHA:
+      case GL_INTENSITY:
+	 state->SourceRGB[0] = GL_PREVIOUS;
+	 break;
+      case GL_RGB:
+      case GL_YCBCR_MESA:
+	 mode_rgb = GL_REPLACE;
+	 break;
+      case GL_RGBA:
+	 state->SourceRGB[2] = GL_TEXTURE;
+	 break;
+      }
+      break;
+
+   case GL_BLEND:
+      mode_rgb = GL_INTERPOLATE;
+      mode_a   = GL_MODULATE;
+
+      switch (texBaseFormat) {
+      case GL_ALPHA:
+	 mode_rgb = GL_REPLACE;
+	 break;
+      case GL_INTENSITY:
+	 mode_a = GL_INTERPOLATE;
+	 state->SourceA[0] = GL_CONSTANT;
+	 state->OperandA[2] = GL_SRC_ALPHA;
+	 /* FALLTHROUGH */
+      case GL_LUMINANCE:
+      case GL_RGB:
+      case GL_LUMINANCE_ALPHA:
+      case GL_RGBA:
+      case GL_YCBCR_MESA:
+	 state->SourceRGB[2] = GL_TEXTURE;
+	 state->SourceA[2]   = GL_TEXTURE;
+	 state->SourceRGB[0] = GL_CONSTANT;
+	 state->OperandRGB[2] = GL_SRC_COLOR;
+	 break;
+      }
+      break;
+
+   case GL_ADD:
+      mode_rgb = (texBaseFormat == GL_ALPHA) ? GL_REPLACE : GL_ADD;
+      mode_a   = (texBaseFormat == GL_INTENSITY) ? GL_ADD : GL_MODULATE;
+      break;
+
+   default:
+      _mesa_problem(NULL,
+                    "Invalid texture env mode in calculate_derived_texenv");
+      return;
+   }
+   
+   state->ModeRGB = (state->SourceRGB[0] != GL_PREVIOUS)
+       ? mode_rgb : GL_REPLACE;
+   state->ModeA   = (state->SourceA[0]   != GL_PREVIOUS)
+       ? mode_a   : GL_REPLACE;
+}
+
+
+void GLAPIENTRY
+_mesa_TexEnvfv( GLenum target, GLenum pname, const GLfloat *param )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+#define TE_ERROR(errCode, msg, value)				\
+   _mesa_error(ctx, errCode, msg, _mesa_lookup_enum_by_nr(value));
+
+   if (target == GL_TEXTURE_ENV) {
+      switch (pname) {
+      case GL_TEXTURE_ENV_MODE:
+         {
+            const GLenum mode = (GLenum) (GLint) *param;
+	    if (texUnit->EnvMode == mode)
+	       return;
+            if (mode == GL_MODULATE ||
+                mode == GL_BLEND ||
+                mode == GL_DECAL ||
+                mode == GL_REPLACE ||
+                (mode == GL_ADD && ctx->Extensions.EXT_texture_env_add) ||
+                (mode == GL_COMBINE &&
+                 (ctx->Extensions.EXT_texture_env_combine ||
+                  ctx->Extensions.ARB_texture_env_combine))) {
+               /* legal */
+               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+               texUnit->EnvMode = mode;
+            }
+            else {
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+               return;
+            }
+         }
+         break;
+      case GL_TEXTURE_ENV_COLOR:
+         {
+            GLfloat tmp[4];
+            tmp[0] = CLAMP( param[0], 0.0F, 1.0F );
+            tmp[1] = CLAMP( param[1], 0.0F, 1.0F );
+            tmp[2] = CLAMP( param[2], 0.0F, 1.0F );
+            tmp[3] = CLAMP( param[3], 0.0F, 1.0F );
+            if (TEST_EQ_4V(tmp, texUnit->EnvColor))
+               return;
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            COPY_4FV(texUnit->EnvColor, tmp);
+         }
+         break;
+      case GL_COMBINE_RGB:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+             ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum mode = (GLenum) (GLint) *param;
+	    if (texUnit->Combine.ModeRGB == mode)
+	       return;
+	    switch (mode) {
+	    case GL_REPLACE:
+	    case GL_MODULATE:
+	    case GL_ADD:
+	    case GL_ADD_SIGNED:
+	    case GL_INTERPOLATE:
+               /* OK */
+	       break;
+            case GL_SUBTRACT:
+               if (!ctx->Extensions.ARB_texture_env_combine) {
+                  TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+                  return;
+               }
+               break;
+	    case GL_DOT3_RGB_EXT:
+	    case GL_DOT3_RGBA_EXT:
+	       if (!ctx->Extensions.EXT_texture_env_dot3) {
+                  TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+		  return;
+	       }
+	       break;
+	    case GL_DOT3_RGB:
+	    case GL_DOT3_RGBA:
+	       if (!ctx->Extensions.ARB_texture_env_dot3) {
+                  TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+		  return;
+	       }
+	       break;
+	    case GL_MODULATE_ADD_ATI:
+	    case GL_MODULATE_SIGNED_ADD_ATI:
+	    case GL_MODULATE_SUBTRACT_ATI:
+	       if (!ctx->Extensions.ATI_texture_env_combine3) {
+                  TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+		  return;
+	       }
+	       break;
+	    default:
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+	       return;
+	    }
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->Combine.ModeRGB = mode;
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+         break;
+      case GL_COMBINE_ALPHA:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+             ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum mode = (GLenum) (GLint) *param;
+	    if (texUnit->Combine.ModeA == mode)
+	       return;
+            switch (mode) {
+	    case GL_REPLACE:
+	    case GL_MODULATE:
+	    case GL_ADD:
+	    case GL_ADD_SIGNED:
+	    case GL_INTERPOLATE:
+	       /* OK */
+	       break;
+	    case GL_SUBTRACT:
+	       if (!ctx->Extensions.ARB_texture_env_combine) {
+		  TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+		  return;
+	       }
+	       break;
+	    case GL_MODULATE_ADD_ATI:
+	    case GL_MODULATE_SIGNED_ADD_ATI:
+	    case GL_MODULATE_SUBTRACT_ATI:
+	       if (!ctx->Extensions.ATI_texture_env_combine3) {
+                  TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+		  return;
+	       }
+	       break;
+	    default:
+	       TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", mode);
+	       return;
+	    }
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->Combine.ModeA = mode;
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_SOURCE0_RGB:
+      case GL_SOURCE1_RGB:
+      case GL_SOURCE2_RGB:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+	     ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum source = (GLenum) (GLint) *param;
+	    const GLuint s = pname - GL_SOURCE0_RGB;
+	    if (texUnit->Combine.SourceRGB[s] == source)
+	       return;
+            if (source == GL_TEXTURE ||
+                source == GL_CONSTANT ||
+                source == GL_PRIMARY_COLOR ||
+                source == GL_PREVIOUS ||
+                (ctx->Extensions.ARB_texture_env_crossbar &&
+                 source >= GL_TEXTURE0 &&
+                 source < GL_TEXTURE0 + ctx->Const.MaxTextureUnits) ||
+                (ctx->Extensions.ATI_texture_env_combine3 &&
+                 (source == GL_ZERO || source == GL_ONE))) {
+               /* legal */
+	       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	       texUnit->Combine.SourceRGB[s] = source;
+            }
+            else {
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", source);
+	       return;
+	    }
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_SOURCE0_ALPHA:
+      case GL_SOURCE1_ALPHA:
+      case GL_SOURCE2_ALPHA:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+             ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum source = (GLenum) (GLint) *param;
+	    const GLuint s = pname - GL_SOURCE0_ALPHA;
+	    if (texUnit->Combine.SourceA[s] == source)
+	       return;
+            if (source == GL_TEXTURE ||
+                source == GL_CONSTANT ||
+                source == GL_PRIMARY_COLOR ||
+                source == GL_PREVIOUS ||
+                (ctx->Extensions.ARB_texture_env_crossbar &&
+                 source >= GL_TEXTURE0 &&
+                 source < GL_TEXTURE0 + ctx->Const.MaxTextureUnits) ||
+		(ctx->Extensions.ATI_texture_env_combine3 &&
+                 (source == GL_ZERO || source == GL_ONE))) {
+               /* legal */
+	       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	       texUnit->Combine.SourceA[s] = source;
+            }
+            else {
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", source);
+	       return;
+	    }
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_OPERAND0_RGB:
+      case GL_OPERAND1_RGB:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+	     ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum operand = (GLenum) (GLint) *param;
+	    const GLuint s = pname - GL_OPERAND0_RGB;
+	    if (texUnit->Combine.OperandRGB[s] == operand)
+	       return;
+	    switch (operand) {
+	    case GL_SRC_COLOR:
+	    case GL_ONE_MINUS_SRC_COLOR:
+	    case GL_SRC_ALPHA:
+	    case GL_ONE_MINUS_SRC_ALPHA:
+	       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	       texUnit->Combine.OperandRGB[s] = operand;
+	       break;
+	    default:
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", operand);
+	       return;
+	    }
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_OPERAND0_ALPHA:
+      case GL_OPERAND1_ALPHA:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+             ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum operand = (GLenum) (GLint) *param;
+	    if (texUnit->Combine.OperandA[pname-GL_OPERAND0_ALPHA] == operand)
+	       return;
+	    switch (operand) {
+	    case GL_SRC_ALPHA:
+	    case GL_ONE_MINUS_SRC_ALPHA:
+	       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	       texUnit->Combine.OperandA[pname-GL_OPERAND0_ALPHA] = operand;
+	       break;
+	    default:
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", operand);
+	       return;
+	    }
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_OPERAND2_RGB:
+	 if (ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum operand = (GLenum) (GLint) *param;
+	    if (texUnit->Combine.OperandRGB[2] == operand)
+	       return;
+	    switch (operand) {
+	    case GL_SRC_COLOR:           /* ARB combine only */
+	    case GL_ONE_MINUS_SRC_COLOR: /* ARB combine only */
+	    case GL_SRC_ALPHA:
+	    case GL_ONE_MINUS_SRC_ALPHA: /* ARB combine only */
+	       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	       texUnit->Combine.OperandRGB[2] = operand;
+               break;
+	    default:
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", operand);
+	       return;
+	    }
+	 }
+	 else if (ctx->Extensions.EXT_texture_env_combine) {
+	    const GLenum operand = (GLenum) (GLint) *param;
+	    if (texUnit->Combine.OperandRGB[2] == operand)
+	       return;
+	    /* operand must be GL_SRC_ALPHA which is the initial value - thus
+	       don't need to actually compare the operand to the possible value */
+	    else {
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", operand);
+	       return;
+	    }
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_OPERAND2_ALPHA:
+	 if (ctx->Extensions.ARB_texture_env_combine) {
+	    const GLenum operand = (GLenum) (GLint) *param;
+	    if (texUnit->Combine.OperandA[2] == operand)
+	       return;
+	    switch (operand) {
+	    case GL_SRC_ALPHA:
+	    case GL_ONE_MINUS_SRC_ALPHA: /* ARB combine only */
+	       FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	       texUnit->Combine.OperandA[2] = operand;
+	       break;
+	    default:
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", operand);
+	       return;
+	    }
+	 }
+	 else if (ctx->Extensions.EXT_texture_env_combine) {
+	    const GLenum operand = (GLenum) (GLint) *param;
+	    if (texUnit->Combine.OperandA[2] == operand)
+	       return;
+	    /* operand must be GL_SRC_ALPHA which is the initial value - thus
+	       don't need to actually compare the operand to the possible value */
+	    else {
+               TE_ERROR(GL_INVALID_ENUM, "glTexEnv(param=%s)", operand);
+	       return;
+	    }
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_RGB_SCALE:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+             ctx->Extensions.ARB_texture_env_combine) {
+	    GLuint newshift;
+	    if (*param == 1.0) {
+	       newshift = 0;
+	    }
+	    else if (*param == 2.0) {
+	       newshift = 1;
+	    }
+	    else if (*param == 4.0) {
+	       newshift = 2;
+	    }
+	    else {
+	       _mesa_error( ctx, GL_INVALID_VALUE,
+                            "glTexEnv(GL_RGB_SCALE not 1, 2 or 4)" );
+	       return;
+	    }
+	    if (texUnit->Combine.ScaleShiftRGB == newshift)
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->Combine.ScaleShiftRGB = newshift;
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      case GL_ALPHA_SCALE:
+	 if (ctx->Extensions.EXT_texture_env_combine ||
+             ctx->Extensions.ARB_texture_env_combine) {
+	    GLuint newshift;
+	    if (*param == 1.0) {
+	       newshift = 0;
+	    }
+	    else if (*param == 2.0) {
+	       newshift = 1;
+	    }
+	    else if (*param == 4.0) {
+	       newshift = 2;
+	    }
+	    else {
+	       _mesa_error( ctx, GL_INVALID_VALUE,
+                            "glTexEnv(GL_ALPHA_SCALE not 1, 2 or 4)" );
+	       return;
+	    }
+	    if (texUnit->Combine.ScaleShiftA == newshift)
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->Combine.ScaleShiftA = newshift;
+	 }
+	 else {
+            TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	    return;
+	 }
+	 break;
+      default:
+	 _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname)" );
+	 return;
+      }
+   }
+   else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) {
+      /* GL_EXT_texture_lod_bias */
+      if (!ctx->Extensions.EXT_texture_lod_bias) {
+	 _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(target=0x%x)", target );
+	 return;
+      }
+      if (pname == GL_TEXTURE_LOD_BIAS_EXT) {
+	 if (texUnit->LodBias == param[0])
+	    return;
+	 FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+         texUnit->LodBias = param[0];
+      }
+      else {
+         TE_ERROR(GL_INVALID_ENUM, "glTexEnv(pname=%s)", pname);
+	 return;
+      }
+   }
+   else if (target == GL_POINT_SPRITE_NV) {
+      /* GL_ARB_point_sprite / GL_NV_point_sprite */
+      if (!ctx->Extensions.NV_point_sprite
+	  && !ctx->Extensions.ARB_point_sprite) {
+	 _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(target=0x%x)", target );
+	 return;
+      }
+      if (pname == GL_COORD_REPLACE_NV) {
+         const GLenum value = (GLenum) param[0];
+         if (value == GL_TRUE || value == GL_FALSE) {
+            /* It's kind of weird to set point state via glTexEnv,
+             * but that's what the spec calls for.
+             */
+            const GLboolean state = (GLboolean) value;
+            if (ctx->Point.CoordReplace[ctx->Texture.CurrentUnit] == state)
+               return;
+            FLUSH_VERTICES(ctx, _NEW_POINT);
+            ctx->Point.CoordReplace[ctx->Texture.CurrentUnit] = state;
+         }
+         else {
+            _mesa_error( ctx, GL_INVALID_VALUE, "glTexEnv(param=0x%x)", value);
+            return;
+         }
+      }
+      else {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(pname=0x%x)", pname );
+         return;
+      }
+   }
+   else {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glTexEnv(target=0x%x)",target );
+      return;
+   }
+
+   if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glTexEnv %s %s %.1f(%s) ...\n",
+                  _mesa_lookup_enum_by_nr(target),
+                  _mesa_lookup_enum_by_nr(pname),
+                  *param,
+                  _mesa_lookup_enum_by_nr((GLenum) (GLint) *param));
+
+   /* Tell device driver about the new texture environment */
+   if (ctx->Driver.TexEnv) {
+      (*ctx->Driver.TexEnv)( ctx, target, pname, param );
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_TexEnvf( GLenum target, GLenum pname, GLfloat param )
+{
+   _mesa_TexEnvfv( target, pname, &param );
+}
+
+
+
+void GLAPIENTRY
+_mesa_TexEnvi( GLenum target, GLenum pname, GLint param )
+{
+   GLfloat p[4];
+   p[0] = (GLfloat) param;
+   p[1] = p[2] = p[3] = 0.0;
+   _mesa_TexEnvfv( target, pname, p );
+}
+
+
+void GLAPIENTRY
+_mesa_TexEnviv( GLenum target, GLenum pname, const GLint *param )
+{
+   GLfloat p[4];
+   if (pname == GL_TEXTURE_ENV_COLOR) {
+      p[0] = INT_TO_FLOAT( param[0] );
+      p[1] = INT_TO_FLOAT( param[1] );
+      p[2] = INT_TO_FLOAT( param[2] );
+      p[3] = INT_TO_FLOAT( param[3] );
+   }
+   else {
+      p[0] = (GLfloat) param[0];
+      p[1] = p[2] = p[3] = 0;  /* init to zero, just to be safe */
+   }
+   _mesa_TexEnvfv( target, pname, p );
+}
+
+
+void GLAPIENTRY
+_mesa_GetTexEnvfv( GLenum target, GLenum pname, GLfloat *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target == GL_TEXTURE_ENV) {
+      switch (pname) {
+         case GL_TEXTURE_ENV_MODE:
+            *params = ENUM_TO_FLOAT(texUnit->EnvMode);
+            break;
+         case GL_TEXTURE_ENV_COLOR:
+            COPY_4FV( params, texUnit->EnvColor );
+            break;
+         case GL_COMBINE_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.ModeRGB;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_COMBINE_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.ModeA;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_SOURCE0_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.SourceRGB[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_SOURCE1_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.SourceRGB[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_SOURCE2_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.SourceRGB[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_SOURCE0_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.SourceA[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_SOURCE1_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.SourceA[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_SOURCE2_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.SourceA[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_OPERAND0_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.OperandRGB[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_OPERAND1_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.OperandRGB[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_OPERAND2_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.OperandRGB[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_OPERAND0_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.OperandA[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_OPERAND1_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.OperandA[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_OPERAND2_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLfloat) texUnit->Combine.OperandA[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+            }
+            break;
+         case GL_RGB_SCALE:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               if (texUnit->Combine.ScaleShiftRGB == 0)
+                  *params = 1.0;
+               else if (texUnit->Combine.ScaleShiftRGB == 1)
+                  *params = 2.0;
+               else
+                  *params = 4.0;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+               return;
+            }
+            break;
+         case GL_ALPHA_SCALE:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               if (texUnit->Combine.ScaleShiftA == 0)
+                  *params = 1.0;
+               else if (texUnit->Combine.ScaleShiftA == 1)
+                  *params = 2.0;
+               else
+                  *params = 4.0;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)");
+               return;
+            }
+            break;
+         default:
+            _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname=0x%x)", pname);
+      }
+   }
+   else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) {
+      /* GL_EXT_texture_lod_bias */
+      if (!ctx->Extensions.EXT_texture_lod_bias) {
+	 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" );
+	 return;
+      }
+      if (pname == GL_TEXTURE_LOD_BIAS_EXT) {
+         *params = texUnit->LodBias;
+      }
+      else {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)" );
+	 return;
+      }
+   }
+   else if (target == GL_POINT_SPRITE_NV) {
+      /* GL_ARB_point_sprite / GL_NV_point_sprite */
+      if (!ctx->Extensions.NV_point_sprite
+	  && !ctx->Extensions.ARB_point_sprite) {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" );
+         return;
+      }
+      if (pname == GL_COORD_REPLACE_NV) {
+         *params = (GLfloat) ctx->Point.CoordReplace[ctx->Texture.CurrentUnit];
+      }
+      else {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(pname)" );
+         return;
+      }
+   }
+   else {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnvfv(target)" );
+      return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetTexEnviv( GLenum target, GLenum pname, GLint *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target == GL_TEXTURE_ENV) {
+      switch (pname) {
+         case GL_TEXTURE_ENV_MODE:
+            *params = (GLint) texUnit->EnvMode;
+            break;
+         case GL_TEXTURE_ENV_COLOR:
+            params[0] = FLOAT_TO_INT( texUnit->EnvColor[0] );
+            params[1] = FLOAT_TO_INT( texUnit->EnvColor[1] );
+            params[2] = FLOAT_TO_INT( texUnit->EnvColor[2] );
+            params[3] = FLOAT_TO_INT( texUnit->EnvColor[3] );
+            break;
+         case GL_COMBINE_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.ModeRGB;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_COMBINE_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.ModeA;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_SOURCE0_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.SourceRGB[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_SOURCE1_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.SourceRGB[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_SOURCE2_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.SourceRGB[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_SOURCE0_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.SourceA[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_SOURCE1_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.SourceA[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_SOURCE2_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.SourceA[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_OPERAND0_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.OperandRGB[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_OPERAND1_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.OperandRGB[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_OPERAND2_RGB:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.OperandRGB[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_OPERAND0_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.OperandA[0];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_OPERAND1_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.OperandA[1];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_OPERAND2_ALPHA:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               *params = (GLint) texUnit->Combine.OperandA[2];
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+            }
+            break;
+         case GL_RGB_SCALE:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               if (texUnit->Combine.ScaleShiftRGB == 0)
+                  *params = 1;
+               else if (texUnit->Combine.ScaleShiftRGB == 1)
+                  *params = 2;
+               else
+                  *params = 4;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+               return;
+            }
+            break;
+         case GL_ALPHA_SCALE:
+            if (ctx->Extensions.EXT_texture_env_combine ||
+                ctx->Extensions.ARB_texture_env_combine) {
+               if (texUnit->Combine.ScaleShiftA == 0)
+                  *params = 1;
+               else if (texUnit->Combine.ScaleShiftA == 1)
+                  *params = 2;
+               else
+                  *params = 4;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)");
+               return;
+            }
+            break;
+         default:
+            _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname=0x%x)",
+                        pname);
+      }
+   }
+   else if (target == GL_TEXTURE_FILTER_CONTROL_EXT) {
+      /* GL_EXT_texture_lod_bias */
+      if (!ctx->Extensions.EXT_texture_lod_bias) {
+	 _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" );
+	 return;
+      }
+      if (pname == GL_TEXTURE_LOD_BIAS_EXT) {
+         *params = (GLint) texUnit->LodBias;
+      }
+      else {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)" );
+	 return;
+      }
+   }
+   else if (target == GL_POINT_SPRITE_NV) {
+      /* GL_ARB_point_sprite / GL_NV_point_sprite */
+      if (!ctx->Extensions.NV_point_sprite
+	  && !ctx->Extensions.ARB_point_sprite) {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" );
+         return;
+      }
+      if (pname == GL_COORD_REPLACE_NV) {
+         *params = (GLint) ctx->Point.CoordReplace[ctx->Texture.CurrentUnit];
+      }
+      else {
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(pname)" );
+         return;
+      }
+   }
+   else {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexEnviv(target)" );
+      return;
+   }
+}
+
+
+
+
+/**********************************************************************/
+/*                       Texture Parameters                           */
+/**********************************************************************/
+
+static GLboolean 
+_mesa_validate_texture_wrap_mode(GLcontext * ctx,
+				 GLenum target, GLenum eparam)
+{
+   const struct gl_extensions * const e = & ctx->Extensions;
+
+   if (eparam == GL_CLAMP || eparam == GL_CLAMP_TO_EDGE ||
+       (eparam == GL_CLAMP_TO_BORDER && e->ARB_texture_border_clamp)) {
+      /* any texture target */
+      return GL_TRUE;
+   }
+   else if (target != GL_TEXTURE_RECTANGLE_NV &&
+	    (eparam == GL_REPEAT ||
+	     (eparam == GL_MIRRORED_REPEAT &&
+	      e->ARB_texture_mirrored_repeat) ||
+	     (eparam == GL_MIRROR_CLAMP_EXT &&
+	      (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
+	     (eparam == GL_MIRROR_CLAMP_TO_EDGE_EXT &&
+	      (e->ATI_texture_mirror_once || e->EXT_texture_mirror_clamp)) ||
+	     (eparam == GL_MIRROR_CLAMP_TO_BORDER_EXT &&
+	      (e->EXT_texture_mirror_clamp)))) {
+      /* non-rectangle texture */
+      return GL_TRUE;
+   }
+
+   _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
+   return GL_FALSE;
+}
+
+
+void GLAPIENTRY
+_mesa_TexParameterf( GLenum target, GLenum pname, GLfloat param )
+{
+   _mesa_TexParameterfv(target, pname, &param);
+}
+
+
+void GLAPIENTRY
+_mesa_TexParameterfv( GLenum target, GLenum pname, const GLfloat *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   GLenum eparam = (GLenum) (GLint) params[0];
+   struct gl_texture_object *texObj;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glTexParameter %s %s %.1f(%s)...\n",
+                  _mesa_lookup_enum_by_nr(target),
+                  _mesa_lookup_enum_by_nr(pname),
+                  *params,
+		  _mesa_lookup_enum_by_nr(eparam));
+
+
+   switch (target) {
+      case GL_TEXTURE_1D:
+         texObj = texUnit->Current1D;
+         break;
+      case GL_TEXTURE_2D:
+         texObj = texUnit->Current2D;
+         break;
+      case GL_TEXTURE_3D:
+         texObj = texUnit->Current3D;
+         break;
+      case GL_TEXTURE_CUBE_MAP:
+         if (!ctx->Extensions.ARB_texture_cube_map) {
+            _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
+            return;
+         }
+         texObj = texUnit->CurrentCubeMap;
+         break;
+      case GL_TEXTURE_RECTANGLE_NV:
+         if (!ctx->Extensions.NV_texture_rectangle) {
+            _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
+            return;
+         }
+         texObj = texUnit->CurrentRect;
+         break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexParameter(target)" );
+         return;
+   }
+
+   switch (pname) {
+      case GL_TEXTURE_MIN_FILTER:
+         /* A small optimization */
+         if (texObj->MinFilter == eparam)
+            return;
+         if (eparam==GL_NEAREST || eparam==GL_LINEAR) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->MinFilter = eparam;
+         }
+         else if ((eparam==GL_NEAREST_MIPMAP_NEAREST ||
+                   eparam==GL_LINEAR_MIPMAP_NEAREST ||
+                   eparam==GL_NEAREST_MIPMAP_LINEAR ||
+                   eparam==GL_LINEAR_MIPMAP_LINEAR) &&
+                  texObj->Target != GL_TEXTURE_RECTANGLE_NV) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->MinFilter = eparam;
+         }
+         else {
+            _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
+            return;
+         }
+         break;
+      case GL_TEXTURE_MAG_FILTER:
+         /* A small optimization */
+         if (texObj->MagFilter == eparam)
+            return;
+
+         if (eparam==GL_NEAREST || eparam==GL_LINEAR) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->MagFilter = eparam;
+         }
+         else {
+            _mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
+            return;
+         }
+         break;
+      case GL_TEXTURE_WRAP_S:
+         if (texObj->WrapS == eparam)
+            return;
+         if (_mesa_validate_texture_wrap_mode(ctx, texObj->Target, eparam)) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->WrapS = eparam;
+         }
+         else {
+            return;
+         }
+         break;
+      case GL_TEXTURE_WRAP_T:
+         if (texObj->WrapT == eparam)
+            return;
+         if (_mesa_validate_texture_wrap_mode(ctx, texObj->Target, eparam)) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->WrapT = eparam;
+         }
+         else {
+            return;
+         }
+         break;
+      case GL_TEXTURE_WRAP_R:
+         if (texObj->WrapR == eparam)
+            return;
+         if (_mesa_validate_texture_wrap_mode(ctx, texObj->Target, eparam)) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->WrapR = eparam;
+         }
+         else {
+	    return;
+         }
+         break;
+      case GL_TEXTURE_BORDER_COLOR:
+         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+         texObj->BorderColor[RCOMP] = params[0];
+         texObj->BorderColor[GCOMP] = params[1];
+         texObj->BorderColor[BCOMP] = params[2];
+         texObj->BorderColor[ACOMP] = params[3];
+         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[RCOMP], params[0]);
+         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[GCOMP], params[1]);
+         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[BCOMP], params[2]);
+         UNCLAMPED_FLOAT_TO_CHAN(texObj->_BorderChan[ACOMP], params[3]);
+         break;
+      case GL_TEXTURE_MIN_LOD:
+         if (texObj->MinLod == params[0])
+            return;
+         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+         texObj->MinLod = params[0];
+         break;
+      case GL_TEXTURE_MAX_LOD:
+         if (texObj->MaxLod == params[0])
+            return;
+         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+         texObj->MaxLod = params[0];
+         break;
+      case GL_TEXTURE_BASE_LEVEL:
+         if (params[0] < 0.0) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
+            return;
+         }
+         if (target == GL_TEXTURE_RECTANGLE_NV && params[0] != 0.0) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
+            return;
+         }
+         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+         texObj->BaseLevel = (GLint) params[0];
+         break;
+      case GL_TEXTURE_MAX_LEVEL:
+         if (params[0] < 0.0) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
+            return;
+         }
+         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+         texObj->MaxLevel = (GLint) params[0];
+         break;
+      case GL_TEXTURE_PRIORITY:
+         FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+         texObj->Priority = CLAMP( params[0], 0.0F, 1.0F );
+         break;
+      case GL_TEXTURE_MAX_ANISOTROPY_EXT:
+         if (ctx->Extensions.EXT_texture_filter_anisotropic) {
+	    if (params[0] < 1.0) {
+	       _mesa_error(ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
+	       return;
+	    }
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            /* clamp to max, that's what NVIDIA does */
+            texObj->MaxAnisotropy = MIN2(params[0],
+                                         ctx->Const.MaxTextureMaxAnisotropy);
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)");
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_SGIX:
+         if (ctx->Extensions.SGIX_shadow) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->CompareFlag = params[0] ? GL_TRUE : GL_FALSE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glTexParameter(pname=GL_TEXTURE_COMPARE_SGIX)");
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_OPERATOR_SGIX:
+         if (ctx->Extensions.SGIX_shadow) {
+            GLenum op = (GLenum) params[0];
+            if (op == GL_TEXTURE_LEQUAL_R_SGIX ||
+                op == GL_TEXTURE_GEQUAL_R_SGIX) {
+               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+               texObj->CompareOperator = op;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM, "glTexParameter(param)");
+            }
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                    "glTexParameter(pname=GL_TEXTURE_COMPARE_OPERATOR_SGIX)");
+            return;
+         }
+         break;
+      case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */
+         if (ctx->Extensions.SGIX_shadow_ambient) {
+            FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+            texObj->ShadowAmbient = CLAMP(params[0], 0.0F, 1.0F);
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glTexParameter(pname=GL_SHADOW_AMBIENT_SGIX)");
+            return;
+         }
+         break;
+      case GL_GENERATE_MIPMAP_SGIS:
+         if (ctx->Extensions.SGIS_generate_mipmap) {
+            texObj->GenerateMipmap = params[0] ? GL_TRUE : GL_FALSE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glTexParameter(pname=GL_GENERATE_MIPMAP_SGIS)");
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_MODE_ARB:
+         if (ctx->Extensions.ARB_shadow) {
+            const GLenum mode = (GLenum) params[0];
+            if (mode == GL_NONE || mode == GL_COMPARE_R_TO_TEXTURE_ARB) {
+               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+               texObj->CompareMode = mode;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM,
+                           "glTexParameter(bad GL_TEXTURE_COMPARE_MODE_ARB: 0x%x)", mode);
+               return;
+            }
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glTexParameter(pname=GL_TEXTURE_COMPARE_MODE_ARB)");
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_FUNC_ARB:
+         if (ctx->Extensions.ARB_shadow) {
+            const GLenum func = (GLenum) params[0];
+            if (func == GL_LEQUAL || func == GL_GEQUAL) {
+               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+               texObj->CompareFunc = func;
+            }
+            else if (ctx->Extensions.EXT_shadow_funcs &&
+                     (func == GL_EQUAL ||
+                      func == GL_NOTEQUAL ||
+                      func == GL_LESS ||
+                      func == GL_GREATER ||
+                      func == GL_ALWAYS ||
+                      func == GL_NEVER)) {
+               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+               texObj->CompareFunc = func;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM,
+                           "glTexParameter(bad GL_TEXTURE_COMPARE_FUNC_ARB)");
+               return;
+            }
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glTexParameter(pname=GL_TEXTURE_COMPARE_FUNC_ARB)");
+            return;
+         }
+         break;
+      case GL_DEPTH_TEXTURE_MODE_ARB:
+         if (ctx->Extensions.ARB_depth_texture) {
+            const GLenum result = (GLenum) params[0];
+            if (result == GL_LUMINANCE || result == GL_INTENSITY
+                || result == GL_ALPHA) {
+               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+               texObj->DepthMode = result;
+            }
+            else {
+               _mesa_error(ctx, GL_INVALID_ENUM,
+                          "glTexParameter(bad GL_DEPTH_TEXTURE_MODE_ARB)");
+               return;
+            }
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glTexParameter(pname=GL_DEPTH_TEXTURE_MODE_ARB)");
+            return;
+         }
+         break;
+      case GL_TEXTURE_LOD_BIAS:
+         /* NOTE: this is really part of OpenGL 1.4, not EXT_texture_lod_bias*/
+         if (ctx->Extensions.EXT_texture_lod_bias) {
+            if (texObj->LodBias != params[0]) {
+               FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+               texObj->LodBias = params[0];
+            }
+         }
+         break;
+
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glTexParameter(pname=0x%x)", pname);
+         return;
+   }
+
+   texObj->Complete = GL_FALSE;
+
+   if (ctx->Driver.TexParameter) {
+      (*ctx->Driver.TexParameter)( ctx, target, texObj, pname, params );
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_TexParameteri( GLenum target, GLenum pname, GLint param )
+{
+   GLfloat fparam[4];
+   if (pname == GL_TEXTURE_PRIORITY)
+      fparam[0] = INT_TO_FLOAT(param);
+   else
+      fparam[0] = (GLfloat) param;
+   fparam[1] = fparam[2] = fparam[3] = 0.0;
+   _mesa_TexParameterfv(target, pname, fparam);
+}
+
+
+void GLAPIENTRY
+_mesa_TexParameteriv( GLenum target, GLenum pname, const GLint *params )
+{
+   GLfloat fparam[4];
+   if (pname == GL_TEXTURE_BORDER_COLOR) {
+      fparam[0] = INT_TO_FLOAT(params[0]);
+      fparam[1] = INT_TO_FLOAT(params[1]);
+      fparam[2] = INT_TO_FLOAT(params[2]);
+      fparam[3] = INT_TO_FLOAT(params[3]);
+   }
+   else {
+      if (pname == GL_TEXTURE_PRIORITY)
+         fparam[0] = INT_TO_FLOAT(params[0]);
+      else
+         fparam[0] = (GLfloat) params[0];
+      fparam[1] = fparam[2] = fparam[3] = 0.0F;
+   }
+   _mesa_TexParameterfv(target, pname, fparam);
+}
+
+
+void GLAPIENTRY
+_mesa_GetTexLevelParameterfv( GLenum target, GLint level,
+                              GLenum pname, GLfloat *params )
+{
+   GLint iparam;
+   _mesa_GetTexLevelParameteriv( target, level, pname, &iparam );
+   *params = (GLfloat) iparam;
+}
+
+
+static GLuint
+tex_image_dimensions(GLcontext *ctx, GLenum target)
+{
+   switch (target) {
+      case GL_TEXTURE_1D:
+      case GL_PROXY_TEXTURE_1D:
+         return 1;
+      case GL_TEXTURE_2D:
+      case GL_PROXY_TEXTURE_2D:
+         return 2;
+      case GL_TEXTURE_3D:
+      case GL_PROXY_TEXTURE_3D:
+         return 3;
+      case GL_TEXTURE_CUBE_MAP:
+      case GL_PROXY_TEXTURE_CUBE_MAP:
+      case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
+      case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
+      case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
+      case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
+      case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
+      case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+         return ctx->Extensions.ARB_texture_cube_map ? 2 : 0;
+      case GL_TEXTURE_RECTANGLE_NV:
+      case GL_PROXY_TEXTURE_RECTANGLE_NV:
+         return ctx->Extensions.NV_texture_rectangle ? 2 : 0;
+      default:
+         _mesa_problem(ctx, "bad target in _mesa_tex_target_dimensions()");
+         return 0;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetTexLevelParameteriv( GLenum target, GLint level,
+                              GLenum pname, GLint *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   const struct gl_texture_image *img = NULL;
+   GLuint dimensions;
+   GLboolean isProxy;
+   GLint maxLevels;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   /* this will catch bad target values */
+   dimensions = tex_image_dimensions(ctx, target);  /* 1, 2 or 3 */
+   if (dimensions == 0) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexLevelParameter[if]v(target)");
+      return;
+   }
+
+   switch (target) {
+   case GL_TEXTURE_1D:
+   case GL_PROXY_TEXTURE_1D:
+   case GL_TEXTURE_2D:
+   case GL_PROXY_TEXTURE_2D:
+      maxLevels = ctx->Const.MaxTextureLevels;
+      break;
+   case GL_TEXTURE_3D:
+   case GL_PROXY_TEXTURE_3D:
+      maxLevels = ctx->Const.Max3DTextureLevels;
+      break;
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
+   case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
+   case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
+   case GL_PROXY_TEXTURE_CUBE_MAP:
+      maxLevels = ctx->Const.MaxCubeTextureLevels;
+      break;
+   case GL_TEXTURE_RECTANGLE_NV:
+   case GL_PROXY_TEXTURE_RECTANGLE_NV:
+      maxLevels = 1;
+      break;
+   default:
+      _mesa_problem(ctx, "switch in _mesa_GetTexLevelParameter");
+      return;
+   }
+
+   if (level < 0 || level >= maxLevels) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glGetTexLevelParameter[if]v" );
+      return;
+   }
+
+   img = _mesa_select_tex_image(ctx, texUnit, target, level);
+   if (!img || !img->TexFormat) {
+      /* undefined texture image */
+      if (pname == GL_TEXTURE_COMPONENTS)
+         *params = 1;
+      else
+         *params = 0;
+      return;
+   }
+
+   isProxy = (target == GL_PROXY_TEXTURE_1D) ||
+             (target == GL_PROXY_TEXTURE_2D) ||
+             (target == GL_PROXY_TEXTURE_3D) ||
+             (target == GL_PROXY_TEXTURE_CUBE_MAP) ||
+             (target == GL_PROXY_TEXTURE_RECTANGLE_NV);
+
+   switch (pname) {
+      case GL_TEXTURE_WIDTH:
+         *params = img->Width;
+         return;
+      case GL_TEXTURE_HEIGHT:
+         *params = img->Height;
+         return;
+      case GL_TEXTURE_DEPTH:
+         *params = img->Depth;
+         return;
+      case GL_TEXTURE_INTERNAL_FORMAT:
+         *params = img->IntFormat;
+         return;
+      case GL_TEXTURE_BORDER:
+         *params = img->Border;
+         return;
+      case GL_TEXTURE_RED_SIZE:
+         if (img->Format == GL_RGB || img->Format == GL_RGBA)
+            *params = img->TexFormat->RedBits;
+         else
+            *params = 0;
+         return;
+      case GL_TEXTURE_GREEN_SIZE:
+         if (img->Format == GL_RGB || img->Format == GL_RGBA)
+            *params = img->TexFormat->GreenBits;
+         else
+            *params = 0;
+         return;
+      case GL_TEXTURE_BLUE_SIZE:
+         if (img->Format == GL_RGB || img->Format == GL_RGBA)
+            *params = img->TexFormat->BlueBits;
+         else
+            *params = 0;
+         return;
+      case GL_TEXTURE_ALPHA_SIZE:
+         if (img->Format == GL_ALPHA || img->Format == GL_LUMINANCE_ALPHA ||
+             img->Format == GL_RGBA)
+            *params = img->TexFormat->AlphaBits;
+         else
+            *params = 0;
+         return;
+      case GL_TEXTURE_INTENSITY_SIZE:
+         if (img->Format != GL_INTENSITY)
+            *params = 0;
+         else if (img->TexFormat->IntensityBits > 0)
+            *params = img->TexFormat->IntensityBits;
+         else /* intensity probably stored as rgb texture */
+            *params = MIN2(img->TexFormat->RedBits, img->TexFormat->GreenBits);
+         return;
+      case GL_TEXTURE_LUMINANCE_SIZE:
+         if (img->Format != GL_LUMINANCE &&
+             img->Format != GL_LUMINANCE_ALPHA)
+            *params = 0;
+         else if (img->TexFormat->LuminanceBits > 0)
+            *params = img->TexFormat->LuminanceBits;
+         else /* luminance probably stored as rgb texture */
+            *params = MIN2(img->TexFormat->RedBits, img->TexFormat->GreenBits);
+         return;
+      case GL_TEXTURE_INDEX_SIZE_EXT:
+         if (img->Format == GL_COLOR_INDEX)
+            *params = img->TexFormat->IndexBits;
+         else
+            *params = 0;
+         return;
+      case GL_TEXTURE_DEPTH_SIZE_ARB:
+         if (ctx->Extensions.SGIX_depth_texture ||
+             ctx->Extensions.ARB_depth_texture)
+            *params = img->TexFormat->DepthBits;
+         else
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         return;
+
+      /* GL_ARB_texture_compression */
+      case GL_TEXTURE_COMPRESSED_IMAGE_SIZE:
+         if (ctx->Extensions.ARB_texture_compression) {
+            if (img->IsCompressed && !isProxy)
+               *params = img->CompressedSize;
+            else
+               _mesa_error(ctx, GL_INVALID_OPERATION,
+                           "glGetTexLevelParameter[if]v(pname)");
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      case GL_TEXTURE_COMPRESSED:
+         if (ctx->Extensions.ARB_texture_compression) {
+            *params = (GLint) img->IsCompressed;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+
+      /* GL_ARB_texture_float */
+      case GL_TEXTURE_RED_TYPE_ARB:
+         if (ctx->Extensions.ARB_texture_float) {
+            *params = img->TexFormat->RedBits ? img->TexFormat->DataType : GL_NONE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      case GL_TEXTURE_GREEN_TYPE_ARB:
+         if (ctx->Extensions.ARB_texture_float) {
+            *params = img->TexFormat->GreenBits ? img->TexFormat->DataType : GL_NONE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      case GL_TEXTURE_BLUE_TYPE_ARB:
+         if (ctx->Extensions.ARB_texture_float) {
+            *params = img->TexFormat->BlueBits ? img->TexFormat->DataType : GL_NONE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      case GL_TEXTURE_ALPHA_TYPE_ARB:
+         if (ctx->Extensions.ARB_texture_float) {
+            *params = img->TexFormat->AlphaBits ? img->TexFormat->DataType : GL_NONE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      case GL_TEXTURE_LUMINANCE_TYPE_ARB:
+         if (ctx->Extensions.ARB_texture_float) {
+            *params = img->TexFormat->LuminanceBits ? img->TexFormat->DataType : GL_NONE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      case GL_TEXTURE_INTENSITY_TYPE_ARB:
+         if (ctx->Extensions.ARB_texture_float) {
+            *params = img->TexFormat->IntensityBits ? img->TexFormat->DataType : GL_NONE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      case GL_TEXTURE_DEPTH_TYPE_ARB:
+         if (ctx->Extensions.ARB_texture_float) {
+            *params = img->TexFormat->DepthBits ? img->TexFormat->DataType : GL_NONE;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM,
+                        "glGetTexLevelParameter[if]v(pname)");
+         }
+         return;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glGetTexLevelParameter[if]v(pname)");
+   }
+}
+
+
+
+void GLAPIENTRY
+_mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   struct gl_texture_object *obj;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   obj = _mesa_select_tex_object(ctx, texUnit, target);
+   if (!obj) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(target)");
+      return;
+   }
+
+   switch (pname) {
+      case GL_TEXTURE_MAG_FILTER:
+	 *params = ENUM_TO_FLOAT(obj->MagFilter);
+	 return;
+      case GL_TEXTURE_MIN_FILTER:
+         *params = ENUM_TO_FLOAT(obj->MinFilter);
+         return;
+      case GL_TEXTURE_WRAP_S:
+         *params = ENUM_TO_FLOAT(obj->WrapS);
+         return;
+      case GL_TEXTURE_WRAP_T:
+         *params = ENUM_TO_FLOAT(obj->WrapT);
+         return;
+      case GL_TEXTURE_WRAP_R:
+         *params = ENUM_TO_FLOAT(obj->WrapR);
+         return;
+      case GL_TEXTURE_BORDER_COLOR:
+         params[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
+         params[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
+         params[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
+         params[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
+         return;
+      case GL_TEXTURE_RESIDENT:
+         {
+            GLboolean resident;
+            if (ctx->Driver.IsTextureResident)
+               resident = ctx->Driver.IsTextureResident(ctx, obj);
+            else
+               resident = GL_TRUE;
+            *params = ENUM_TO_FLOAT(resident);
+         }
+         return;
+      case GL_TEXTURE_PRIORITY:
+         *params = obj->Priority;
+         return;
+      case GL_TEXTURE_MIN_LOD:
+         *params = obj->MinLod;
+         return;
+      case GL_TEXTURE_MAX_LOD:
+         *params = obj->MaxLod;
+         return;
+      case GL_TEXTURE_BASE_LEVEL:
+         *params = (GLfloat) obj->BaseLevel;
+         return;
+      case GL_TEXTURE_MAX_LEVEL:
+         *params = (GLfloat) obj->MaxLevel;
+         return;
+      case GL_TEXTURE_MAX_ANISOTROPY_EXT:
+         if (ctx->Extensions.EXT_texture_filter_anisotropic) {
+            *params = obj->MaxAnisotropy;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_SGIX:
+         if (ctx->Extensions.SGIX_shadow) {
+            *params = (GLfloat) obj->CompareFlag;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_OPERATOR_SGIX:
+         if (ctx->Extensions.SGIX_shadow) {
+            *params = (GLfloat) obj->CompareOperator;
+            return;
+         }
+         break;
+      case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */
+         if (ctx->Extensions.SGIX_shadow_ambient) {
+            *params = obj->ShadowAmbient;
+            return;
+         }
+         break;
+      case GL_GENERATE_MIPMAP_SGIS:
+         if (ctx->Extensions.SGIS_generate_mipmap) {
+            *params = (GLfloat) obj->GenerateMipmap;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_MODE_ARB:
+         if (ctx->Extensions.ARB_shadow) {
+            *params = (GLfloat) obj->CompareMode;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_FUNC_ARB:
+         if (ctx->Extensions.ARB_shadow) {
+            *params = (GLfloat) obj->CompareFunc;
+            return;
+         }
+         break;
+      case GL_DEPTH_TEXTURE_MODE_ARB:
+         if (ctx->Extensions.ARB_depth_texture) {
+            *params = (GLfloat) obj->DepthMode;
+            return;
+         }
+         break;
+      case GL_TEXTURE_LOD_BIAS:
+         if (ctx->Extensions.EXT_texture_lod_bias) {
+            *params = obj->LodBias;
+            return;
+         }
+         break;
+      default:
+         ; /* silence warnings */
+   }
+   /* If we get here, pname was an unrecognized enum */
+   _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameterfv(pname=0x%x)",
+               pname);
+}
+
+
+void GLAPIENTRY
+_mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   struct gl_texture_object *obj;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   obj = _mesa_select_tex_object(ctx, texUnit, target);
+   if (!obj) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(target)");
+      return;
+   }
+
+   switch (pname) {
+      case GL_TEXTURE_MAG_FILTER:
+         *params = (GLint) obj->MagFilter;
+         return;
+      case GL_TEXTURE_MIN_FILTER:
+         *params = (GLint) obj->MinFilter;
+         return;
+      case GL_TEXTURE_WRAP_S:
+         *params = (GLint) obj->WrapS;
+         return;
+      case GL_TEXTURE_WRAP_T:
+         *params = (GLint) obj->WrapT;
+         return;
+      case GL_TEXTURE_WRAP_R:
+         *params = (GLint) obj->WrapR;
+         return;
+      case GL_TEXTURE_BORDER_COLOR:
+         {
+            GLfloat b[4];
+            b[0] = CLAMP(obj->BorderColor[0], 0.0F, 1.0F);
+            b[1] = CLAMP(obj->BorderColor[1], 0.0F, 1.0F);
+            b[2] = CLAMP(obj->BorderColor[2], 0.0F, 1.0F);
+            b[3] = CLAMP(obj->BorderColor[3], 0.0F, 1.0F);
+            params[0] = FLOAT_TO_INT(b[0]);
+            params[1] = FLOAT_TO_INT(b[1]);
+            params[2] = FLOAT_TO_INT(b[2]);
+            params[3] = FLOAT_TO_INT(b[3]);
+         }
+         return;
+      case GL_TEXTURE_RESIDENT:
+         {
+            GLboolean resident;
+            if (ctx->Driver.IsTextureResident)
+               resident = ctx->Driver.IsTextureResident(ctx, obj);
+            else
+               resident = GL_TRUE;
+            *params = (GLint) resident;
+         }
+         return;
+      case GL_TEXTURE_PRIORITY:
+         *params = FLOAT_TO_INT(obj->Priority);
+         return;
+      case GL_TEXTURE_MIN_LOD:
+         *params = (GLint) obj->MinLod;
+         return;
+      case GL_TEXTURE_MAX_LOD:
+         *params = (GLint) obj->MaxLod;
+         return;
+      case GL_TEXTURE_BASE_LEVEL:
+         *params = obj->BaseLevel;
+         return;
+      case GL_TEXTURE_MAX_LEVEL:
+         *params = obj->MaxLevel;
+         return;
+      case GL_TEXTURE_MAX_ANISOTROPY_EXT:
+         if (ctx->Extensions.EXT_texture_filter_anisotropic) {
+            *params = (GLint) obj->MaxAnisotropy;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_SGIX:
+         if (ctx->Extensions.SGIX_shadow) {
+            *params = (GLint) obj->CompareFlag;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_OPERATOR_SGIX:
+         if (ctx->Extensions.SGIX_shadow) {
+            *params = (GLint) obj->CompareOperator;
+            return;
+         }
+         break;
+      case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */
+         if (ctx->Extensions.SGIX_shadow_ambient) {
+            *params = (GLint) FLOAT_TO_INT(obj->ShadowAmbient);
+            return;
+         }
+         break;
+      case GL_GENERATE_MIPMAP_SGIS:
+         if (ctx->Extensions.SGIS_generate_mipmap) {
+            *params = (GLint) obj->GenerateMipmap;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_MODE_ARB:
+         if (ctx->Extensions.ARB_shadow) {
+            *params = (GLint) obj->CompareMode;
+            return;
+         }
+         break;
+      case GL_TEXTURE_COMPARE_FUNC_ARB:
+         if (ctx->Extensions.ARB_shadow) {
+            *params = (GLint) obj->CompareFunc;
+            return;
+         }
+         break;
+      case GL_DEPTH_TEXTURE_MODE_ARB:
+         if (ctx->Extensions.ARB_depth_texture) {
+            *params = (GLint) obj->DepthMode;
+            return;
+         }
+         break;
+      case GL_TEXTURE_LOD_BIAS:
+         if (ctx->Extensions.EXT_texture_lod_bias) {
+            *params = (GLint) obj->LodBias;
+            return;
+         }
+         break;
+      default:
+         ; /* silence warnings */
+   }
+   /* If we get here, pname was an unrecognized enum */
+   _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexParameteriv(pname=0x%x)", pname);
+}
+
+
+
+
+/**********************************************************************/
+/*                    Texture Coord Generation                        */
+/**********************************************************************/
+
+#if FEATURE_texgen
+void GLAPIENTRY
+_mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint tUnit = ctx->Texture.CurrentUnit;
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[tUnit];
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
+                  _mesa_lookup_enum_by_nr(coord),
+                  _mesa_lookup_enum_by_nr(pname),
+                  *params,
+		  _mesa_lookup_enum_by_nr((GLenum) (GLint) *params));
+
+   switch (coord) {
+      case GL_S:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+	    GLenum mode = (GLenum) (GLint) *params;
+	    GLuint bits;
+	    switch (mode) {
+	    case GL_OBJECT_LINEAR:
+	       bits = TEXGEN_OBJ_LINEAR;
+	       break;
+	    case GL_EYE_LINEAR:
+	       bits = TEXGEN_EYE_LINEAR;
+	       break;
+	    case GL_REFLECTION_MAP_NV:
+	       bits = TEXGEN_REFLECTION_MAP_NV;
+	       break;
+	    case GL_NORMAL_MAP_NV:
+	       bits = TEXGEN_NORMAL_MAP_NV;
+	       break;
+	    case GL_SPHERE_MAP:
+	       bits = TEXGEN_SPHERE_MAP;
+	       break;
+	    default:
+	       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
+	       return;
+	    }
+	    if (texUnit->GenModeS == mode)
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->GenModeS = mode;
+	    texUnit->_GenBitS = bits;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+	    if (TEST_EQ_4V(texUnit->ObjectPlaneS, params))
+		return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->ObjectPlaneS[0] = params[0];
+	    texUnit->ObjectPlaneS[1] = params[1];
+	    texUnit->ObjectPlaneS[2] = params[2];
+	    texUnit->ObjectPlaneS[3] = params[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+	    GLfloat tmp[4];
+
+            /* Transform plane equation by the inverse modelview matrix */
+            if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
+               _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
+            }
+            _mesa_transform_vector( tmp, params, ctx->ModelviewMatrixStack.Top->inv );
+	    if (TEST_EQ_4V(texUnit->EyePlaneS, tmp))
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    COPY_4FV(texUnit->EyePlaneS, tmp);
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_T:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+	    GLenum mode = (GLenum) (GLint) *params;
+	    GLuint bitt;
+	    switch (mode) {
+               case GL_OBJECT_LINEAR:
+                  bitt = TEXGEN_OBJ_LINEAR;
+                  break;
+               case GL_EYE_LINEAR:
+                  bitt = TEXGEN_EYE_LINEAR;
+                  break;
+               case GL_REFLECTION_MAP_NV:
+                  bitt = TEXGEN_REFLECTION_MAP_NV;
+                  break;
+               case GL_NORMAL_MAP_NV:
+                  bitt = TEXGEN_NORMAL_MAP_NV;
+                  break;
+               case GL_SPHERE_MAP:
+                  bitt = TEXGEN_SPHERE_MAP;
+                  break;
+               default:
+                  _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
+                  return;
+	    }
+	    if (texUnit->GenModeT == mode)
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->GenModeT = mode;
+	    texUnit->_GenBitT = bitt;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+	    if (TEST_EQ_4V(texUnit->ObjectPlaneT, params))
+		return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->ObjectPlaneT[0] = params[0];
+	    texUnit->ObjectPlaneT[1] = params[1];
+	    texUnit->ObjectPlaneT[2] = params[2];
+	    texUnit->ObjectPlaneT[3] = params[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+	    GLfloat tmp[4];
+            /* Transform plane equation by the inverse modelview matrix */
+	    if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
+               _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
+            }
+            _mesa_transform_vector( tmp, params, ctx->ModelviewMatrixStack.Top->inv );
+	    if (TEST_EQ_4V(texUnit->EyePlaneT, tmp))
+		return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    COPY_4FV(texUnit->EyePlaneT, tmp);
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_R:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+	    GLenum mode = (GLenum) (GLint) *params;
+	    GLuint bitr;
+	    switch (mode) {
+	    case GL_OBJECT_LINEAR:
+	       bitr = TEXGEN_OBJ_LINEAR;
+	       break;
+	    case GL_REFLECTION_MAP_NV:
+	       bitr = TEXGEN_REFLECTION_MAP_NV;
+	       break;
+	    case GL_NORMAL_MAP_NV:
+	       bitr = TEXGEN_NORMAL_MAP_NV;
+	       break;
+	    case GL_EYE_LINEAR:
+	       bitr = TEXGEN_EYE_LINEAR;
+	       break;
+	    default:
+	       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
+	       return;
+	    }
+	    if (texUnit->GenModeR == mode)
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->GenModeR = mode;
+	    texUnit->_GenBitR = bitr;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+	    if (TEST_EQ_4V(texUnit->ObjectPlaneR, params))
+		return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->ObjectPlaneR[0] = params[0];
+	    texUnit->ObjectPlaneR[1] = params[1];
+	    texUnit->ObjectPlaneR[2] = params[2];
+	    texUnit->ObjectPlaneR[3] = params[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+	    GLfloat tmp[4];
+            /* Transform plane equation by the inverse modelview matrix */
+            if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
+               _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
+            }
+            _mesa_transform_vector( tmp, params, ctx->ModelviewMatrixStack.Top->inv );
+	    if (TEST_EQ_4V(texUnit->EyePlaneR, tmp))
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    COPY_4FV(texUnit->EyePlaneR, tmp);
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_Q:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+	    GLenum mode = (GLenum) (GLint) *params;
+	    GLuint bitq;
+	    switch (mode) {
+	    case GL_OBJECT_LINEAR:
+	       bitq = TEXGEN_OBJ_LINEAR;
+	       break;
+	    case GL_EYE_LINEAR:
+	       bitq = TEXGEN_EYE_LINEAR;
+	       break;
+	    default:
+	       _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
+	       return;
+	    }
+	    if (texUnit->GenModeQ == mode)
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->GenModeQ = mode;
+	    texUnit->_GenBitQ = bitq;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+	    if (TEST_EQ_4V(texUnit->ObjectPlaneQ, params))
+		return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    texUnit->ObjectPlaneQ[0] = params[0];
+	    texUnit->ObjectPlaneQ[1] = params[1];
+	    texUnit->ObjectPlaneQ[2] = params[2];
+	    texUnit->ObjectPlaneQ[3] = params[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+	    GLfloat tmp[4];
+            /* Transform plane equation by the inverse modelview matrix */
+            if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
+               _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
+            }
+            _mesa_transform_vector( tmp, params, ctx->ModelviewMatrixStack.Top->inv );
+	    if (TEST_EQ_4V(texUnit->EyePlaneQ, tmp))
+	       return;
+	    FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+	    COPY_4FV(texUnit->EyePlaneQ, tmp);
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(coord)" );
+	 return;
+   }
+
+   if (ctx->Driver.TexGen)
+      ctx->Driver.TexGen( ctx, coord, pname, params );
+}
+
+
+void GLAPIENTRY
+_mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
+{
+   GLfloat p[4];
+   p[0] = (GLfloat) params[0];
+   if (pname == GL_TEXTURE_GEN_MODE) {
+      p[1] = p[2] = p[3] = 0.0F;
+   }
+   else {
+      p[1] = (GLfloat) params[1];
+      p[2] = (GLfloat) params[2];
+      p[3] = (GLfloat) params[3];
+   }
+   _mesa_TexGenfv(coord, pname, p);
+}
+
+
+void GLAPIENTRY
+_mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
+{
+   GLfloat p = (GLfloat) param;
+   _mesa_TexGenfv( coord, pname, &p );
+}
+
+
+void GLAPIENTRY
+_mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
+{
+   GLfloat p[4];
+   p[0] = (GLfloat) params[0];
+   if (pname == GL_TEXTURE_GEN_MODE) {
+      p[1] = p[2] = p[3] = 0.0F;
+   }
+   else {
+      p[1] = (GLfloat) params[1];
+      p[2] = (GLfloat) params[2];
+      p[3] = (GLfloat) params[3];
+   }
+   _mesa_TexGenfv( coord, pname, p );
+}
+
+
+void GLAPIENTRY
+_mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
+{
+   _mesa_TexGenfv(coord, pname, &param);
+}
+
+
+void GLAPIENTRY
+_mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
+{
+   _mesa_TexGeniv( coord, pname, &param );
+}
+
+
+
+void GLAPIENTRY
+_mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint tUnit = ctx->Texture.CurrentUnit;
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[tUnit];
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (coord) {
+      case GL_S:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_DOUBLE(texUnit->GenModeS);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneS );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneS );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_T:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_DOUBLE(texUnit->GenModeT);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneT );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneT );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_R:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_DOUBLE(texUnit->GenModeR);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneR );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneR );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_Q:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_DOUBLE(texUnit->GenModeQ);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneQ );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneQ );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
+	    return;
+	 }
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)" );
+	 return;
+   }
+}
+
+
+
+void GLAPIENTRY
+_mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint tUnit = ctx->Texture.CurrentUnit;
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[tUnit];
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (coord) {
+      case GL_S:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_FLOAT(texUnit->GenModeS);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneS );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneS );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_T:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_FLOAT(texUnit->GenModeT);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneT );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneT );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_R:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_FLOAT(texUnit->GenModeR);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneR );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneR );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_Q:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = ENUM_TO_FLOAT(texUnit->GenModeQ);
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            COPY_4V( params, texUnit->ObjectPlaneQ );
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            COPY_4V( params, texUnit->EyePlaneQ );
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
+	    return;
+	 }
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)" );
+	 return;
+   }
+}
+
+
+
+void GLAPIENTRY
+_mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint tUnit = ctx->Texture.CurrentUnit;
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[tUnit];
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (coord) {
+      case GL_S:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = texUnit->GenModeS;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            params[0] = (GLint) texUnit->ObjectPlaneS[0];
+            params[1] = (GLint) texUnit->ObjectPlaneS[1];
+            params[2] = (GLint) texUnit->ObjectPlaneS[2];
+            params[3] = (GLint) texUnit->ObjectPlaneS[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            params[0] = (GLint) texUnit->EyePlaneS[0];
+            params[1] = (GLint) texUnit->EyePlaneS[1];
+            params[2] = (GLint) texUnit->EyePlaneS[2];
+            params[3] = (GLint) texUnit->EyePlaneS[3];
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_T:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = texUnit->GenModeT;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            params[0] = (GLint) texUnit->ObjectPlaneT[0];
+            params[1] = (GLint) texUnit->ObjectPlaneT[1];
+            params[2] = (GLint) texUnit->ObjectPlaneT[2];
+            params[3] = (GLint) texUnit->ObjectPlaneT[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            params[0] = (GLint) texUnit->EyePlaneT[0];
+            params[1] = (GLint) texUnit->EyePlaneT[1];
+            params[2] = (GLint) texUnit->EyePlaneT[2];
+            params[3] = (GLint) texUnit->EyePlaneT[3];
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_R:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = texUnit->GenModeR;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            params[0] = (GLint) texUnit->ObjectPlaneR[0];
+            params[1] = (GLint) texUnit->ObjectPlaneR[1];
+            params[2] = (GLint) texUnit->ObjectPlaneR[2];
+            params[3] = (GLint) texUnit->ObjectPlaneR[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            params[0] = (GLint) texUnit->EyePlaneR[0];
+            params[1] = (GLint) texUnit->EyePlaneR[1];
+            params[2] = (GLint) texUnit->EyePlaneR[2];
+            params[3] = (GLint) texUnit->EyePlaneR[3];
+	 }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
+	    return;
+	 }
+	 break;
+      case GL_Q:
+         if (pname==GL_TEXTURE_GEN_MODE) {
+            params[0] = texUnit->GenModeQ;
+	 }
+	 else if (pname==GL_OBJECT_PLANE) {
+            params[0] = (GLint) texUnit->ObjectPlaneQ[0];
+            params[1] = (GLint) texUnit->ObjectPlaneQ[1];
+            params[2] = (GLint) texUnit->ObjectPlaneQ[2];
+            params[3] = (GLint) texUnit->ObjectPlaneQ[3];
+	 }
+	 else if (pname==GL_EYE_PLANE) {
+            params[0] = (GLint) texUnit->EyePlaneQ[0];
+            params[1] = (GLint) texUnit->EyePlaneQ[1];
+            params[2] = (GLint) texUnit->EyePlaneQ[2];
+            params[3] = (GLint) texUnit->EyePlaneQ[3];
+         }
+	 else {
+	    _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
+	    return;
+	 }
+	 break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)" );
+	 return;
+   }
+}
+#endif
+
+/* GL_ARB_multitexture */
+void GLAPIENTRY
+_mesa_ActiveTextureARB( GLenum target )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   const GLuint texUnit = target - GL_TEXTURE0;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glActiveTexture %s\n",
+                  _mesa_lookup_enum_by_nr(target));
+
+   /* Cater for texture unit 0 is first, therefore use >= */
+   if (texUnit >= ctx->Const.MaxTextureUnits) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glActiveTexture(target)");
+      return;
+   }
+
+   if (ctx->Texture.CurrentUnit == texUnit)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+
+   ctx->Texture.CurrentUnit = texUnit;
+   if (ctx->Transform.MatrixMode == GL_TEXTURE) {
+      /* update current stack pointer */
+      ctx->CurrentStack = &ctx->TextureMatrixStack[texUnit];
+   }
+
+   if (ctx->Driver.ActiveTexture) {
+      (*ctx->Driver.ActiveTexture)( ctx, (GLuint) texUnit );
+   }
+}
+
+
+/* GL_ARB_multitexture */
+void GLAPIENTRY
+_mesa_ClientActiveTextureARB( GLenum target )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint texUnit = target - GL_TEXTURE0;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (texUnit > ctx->Const.MaxTextureUnits) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glClientActiveTexture(target)");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_ARRAY);
+   ctx->Array.ActiveTexture = texUnit;
+}
+
+
+
+/**********************************************************************/
+/*                     Pixel Texgen Extensions                        */
+/**********************************************************************/
+
+void GLAPIENTRY
+_mesa_PixelTexGenSGIX(GLenum mode)
+{
+   GLenum newRgbSource, newAlphaSource;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (mode) {
+      case GL_NONE:
+         newRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
+         newAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
+         break;
+      case GL_ALPHA:
+         newRgbSource = GL_PIXEL_GROUP_COLOR_SGIS;
+         newAlphaSource = GL_CURRENT_RASTER_COLOR;
+         break;
+      case GL_RGB:
+         newRgbSource = GL_CURRENT_RASTER_COLOR;
+         newAlphaSource = GL_PIXEL_GROUP_COLOR_SGIS;
+         break;
+      case GL_RGBA:
+         newRgbSource = GL_CURRENT_RASTER_COLOR;
+         newAlphaSource = GL_CURRENT_RASTER_COLOR;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glPixelTexGenSGIX(mode)");
+         return;
+   }
+
+   if (newRgbSource == ctx->Pixel.FragmentRgbSource &&
+       newAlphaSource == ctx->Pixel.FragmentAlphaSource)
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_PIXEL);
+   ctx->Pixel.FragmentRgbSource = newRgbSource;
+   ctx->Pixel.FragmentAlphaSource = newAlphaSource;
+}
+
+
+void GLAPIENTRY
+_mesa_PixelTexGenParameterfSGIS(GLenum target, GLfloat value)
+{
+   _mesa_PixelTexGenParameteriSGIS(target, (GLint) value);
+}
+
+
+void GLAPIENTRY
+_mesa_PixelTexGenParameterfvSGIS(GLenum target, const GLfloat *value)
+{
+   _mesa_PixelTexGenParameteriSGIS(target, (GLint) *value);
+}
+
+
+void GLAPIENTRY
+_mesa_PixelTexGenParameteriSGIS(GLenum target, GLint value)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (value != GL_CURRENT_RASTER_COLOR && value != GL_PIXEL_GROUP_COLOR_SGIS) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glPixelTexGenParameterSGIS(value)");
+      return;
+   }
+
+   switch (target) {
+   case GL_PIXEL_FRAGMENT_RGB_SOURCE_SGIS:
+      if (ctx->Pixel.FragmentRgbSource == (GLenum) value)
+	 return;
+      FLUSH_VERTICES(ctx, _NEW_PIXEL);
+      ctx->Pixel.FragmentRgbSource = (GLenum) value;
+      break;
+   case GL_PIXEL_FRAGMENT_ALPHA_SOURCE_SGIS:
+      if (ctx->Pixel.FragmentAlphaSource == (GLenum) value)
+	 return;
+      FLUSH_VERTICES(ctx, _NEW_PIXEL);
+      ctx->Pixel.FragmentAlphaSource = (GLenum) value;
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glPixelTexGenParameterSGIS(target)");
+      return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_PixelTexGenParameterivSGIS(GLenum target, const GLint *value)
+{
+  _mesa_PixelTexGenParameteriSGIS(target, *value);
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelTexGenParameterfvSGIS(GLenum target, GLfloat *value)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target == GL_PIXEL_FRAGMENT_RGB_SOURCE_SGIS) {
+      *value = (GLfloat) ctx->Pixel.FragmentRgbSource;
+   }
+   else if (target == GL_PIXEL_FRAGMENT_ALPHA_SOURCE_SGIS) {
+      *value = (GLfloat) ctx->Pixel.FragmentAlphaSource;
+   }
+   else {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelTexGenParameterfvSGIS(target)");
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetPixelTexGenParameterivSGIS(GLenum target, GLint *value)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target == GL_PIXEL_FRAGMENT_RGB_SOURCE_SGIS) {
+      *value = (GLint) ctx->Pixel.FragmentRgbSource;
+   }
+   else if (target == GL_PIXEL_FRAGMENT_ALPHA_SOURCE_SGIS) {
+      *value = (GLint) ctx->Pixel.FragmentAlphaSource;
+   }
+   else {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetPixelTexGenParameterivSGIS(target)");
+   }
+}
+
+
+
+/**********************************************************************/
+/*****                    State management                        *****/
+/**********************************************************************/
+
+
+/**
+ * \note This routine refers to derived texture attribute values to
+ * compute the ENABLE_TEXMAT flags, but is only called on
+ * _NEW_TEXTURE_MATRIX.  On changes to _NEW_TEXTURE, the ENABLE_TEXMAT
+ * flags are updated by _mesa_update_textures(), below.
+ *
+ * \param ctx GL context.
+ */
+static void
+update_texture_matrices( GLcontext *ctx )
+{
+   GLuint i;
+
+   ctx->Texture._TexMatEnabled = 0;
+
+   for (i=0; i < ctx->Const.MaxTextureUnits; i++) {
+      if (_math_matrix_is_dirty(ctx->TextureMatrixStack[i].Top)) {
+	 _math_matrix_analyse( ctx->TextureMatrixStack[i].Top );
+
+	 if (ctx->Texture.Unit[i]._ReallyEnabled &&
+	     ctx->TextureMatrixStack[i].Top->type != MATRIX_IDENTITY)
+	    ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(i);
+
+	 if (ctx->Driver.TextureMatrix)
+	    ctx->Driver.TextureMatrix( ctx, i, ctx->TextureMatrixStack[i].Top);
+      }
+   }
+}
+
+
+
+
+/**
+ * \note This routine refers to derived texture matrix values to
+ * compute the ENABLE_TEXMAT flags, but is only called on
+ * _NEW_TEXTURE.  On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
+ * flags are updated by _mesa_update_texture_matrices, above.
+ *
+ * \param ctx GL context.
+ */
+static void
+update_texture_state( GLcontext *ctx )
+{
+   GLuint unit;
+
+   ctx->NewState |= _NEW_TEXTURE; /* TODO: only set this if there are 
+				   * actual changes. 
+				   */
+
+   ctx->Texture._EnabledUnits = 0;
+   ctx->Texture._GenFlags = 0;
+   ctx->Texture._TexMatEnabled = 0;
+   ctx->Texture._TexGenEnabled = 0;
+
+   /* Update texture unit state.
+    * XXX this loop should probably be broken into separate loops for
+    * texture coord units and texture image units.
+    */
+   for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
+      struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+      GLuint enableBits;
+
+      texUnit->_Current = NULL;
+      texUnit->_ReallyEnabled = 0;
+      texUnit->_GenFlags = 0;
+
+      /* Get the bitmask of texture enables */
+      if (ctx->FragmentProgram._Enabled) {
+         enableBits = ctx->FragmentProgram.Current->TexturesUsed[unit];
+      }
+      else {
+         if (!texUnit->Enabled)
+            continue;
+         enableBits = texUnit->Enabled;
+      }
+
+      /* Look for the highest-priority texture target that's enabled and
+       * complete.  That's the one we'll use for texturing.  If we're using
+       * a fragment program we're guaranteed that bitcount(enabledBits) <= 1.
+       */
+      if (enableBits & TEXTURE_CUBE_BIT) {
+         struct gl_texture_object *texObj = texUnit->CurrentCubeMap;
+         if (!texObj->Complete) {
+            _mesa_test_texobj_completeness(ctx, texObj);
+         }
+         if (texObj->Complete) {
+            texUnit->_ReallyEnabled = TEXTURE_CUBE_BIT;
+            texUnit->_Current = texObj;
+         }
+      }
+
+      if (!texUnit->_ReallyEnabled && (enableBits & TEXTURE_3D_BIT)) {
+         struct gl_texture_object *texObj = texUnit->Current3D;
+         if (!texObj->Complete) {
+            _mesa_test_texobj_completeness(ctx, texObj);
+         }
+         if (texObj->Complete) {
+            texUnit->_ReallyEnabled = TEXTURE_3D_BIT;
+            texUnit->_Current = texObj;
+         }
+      }
+
+      if (!texUnit->_ReallyEnabled && (enableBits & TEXTURE_RECT_BIT)) {
+         struct gl_texture_object *texObj = texUnit->CurrentRect;
+         if (!texObj->Complete) {
+            _mesa_test_texobj_completeness(ctx, texObj);
+         }
+         if (texObj->Complete) {
+            texUnit->_ReallyEnabled = TEXTURE_RECT_BIT;
+            texUnit->_Current = texObj;
+         }
+      }
+
+      if (!texUnit->_ReallyEnabled && (enableBits & TEXTURE_2D_BIT)) {
+         struct gl_texture_object *texObj = texUnit->Current2D;
+         if (!texObj->Complete) {
+            _mesa_test_texobj_completeness(ctx, texObj);
+         }
+         if (texObj->Complete) {
+            texUnit->_ReallyEnabled = TEXTURE_2D_BIT;
+            texUnit->_Current = texObj;
+         }
+      }
+
+      if (!texUnit->_ReallyEnabled && (enableBits & TEXTURE_1D_BIT)) {
+         struct gl_texture_object *texObj = texUnit->Current1D;
+         if (!texObj->Complete) {
+            _mesa_test_texobj_completeness(ctx, texObj);
+         }
+         if (texObj->Complete) {
+            texUnit->_ReallyEnabled = TEXTURE_1D_BIT;
+            texUnit->_Current = texObj;
+         }
+      }
+
+      if (!texUnit->_ReallyEnabled) {
+         continue;
+      }
+
+      if (texUnit->_ReallyEnabled)
+         ctx->Texture._EnabledUnits |= (1 << unit);
+
+      if (texUnit->EnvMode == GL_COMBINE) {
+	 texUnit->_CurrentCombine = & texUnit->Combine;
+      }
+      else {
+         GLenum format = texUnit->_Current->Image[0][0]->Format;
+         if (format == GL_COLOR_INDEX) {
+            format = GL_RGBA;  /* a bit of a hack */
+         }
+         else if (format == GL_DEPTH_COMPONENT) {
+            format = texUnit->_Current->DepthMode;
+         }
+	 calculate_derived_texenv(&texUnit->_EnvMode, texUnit->EnvMode, format);
+	 texUnit->_CurrentCombine = & texUnit->_EnvMode;
+      }
+
+      switch (texUnit->_CurrentCombine->ModeRGB) {
+      case GL_REPLACE:
+	 texUnit->_CurrentCombine->_NumArgsRGB = 1;
+	 break;
+      case GL_MODULATE:
+      case GL_ADD:
+      case GL_ADD_SIGNED:
+      case GL_SUBTRACT:
+      case GL_DOT3_RGB:
+      case GL_DOT3_RGBA:
+      case GL_DOT3_RGB_EXT:
+      case GL_DOT3_RGBA_EXT:
+	 texUnit->_CurrentCombine->_NumArgsRGB = 2;
+	 break;
+      case GL_INTERPOLATE:
+      case GL_MODULATE_ADD_ATI:
+      case GL_MODULATE_SIGNED_ADD_ATI:
+      case GL_MODULATE_SUBTRACT_ATI:
+	 texUnit->_CurrentCombine->_NumArgsRGB = 3;
+	 break;
+      default:
+	 texUnit->_CurrentCombine->_NumArgsRGB = 0;
+         _mesa_problem(ctx, "invalid RGB combine mode in update_texture_state");
+         return;
+      }
+
+      switch (texUnit->_CurrentCombine->ModeA) {
+      case GL_REPLACE:
+	 texUnit->_CurrentCombine->_NumArgsA = 1;
+	 break;
+      case GL_MODULATE:
+      case GL_ADD:
+      case GL_ADD_SIGNED:
+      case GL_SUBTRACT:
+	 texUnit->_CurrentCombine->_NumArgsA = 2;
+	 break;
+      case GL_INTERPOLATE:
+      case GL_MODULATE_ADD_ATI:
+      case GL_MODULATE_SIGNED_ADD_ATI:
+      case GL_MODULATE_SUBTRACT_ATI:
+	 texUnit->_CurrentCombine->_NumArgsA = 3;
+	 break;
+      default:
+	 texUnit->_CurrentCombine->_NumArgsA = 0;
+         _mesa_problem(ctx, "invalid Alpha combine mode in update_texture_state");
+	 break;
+      }
+
+      if (texUnit->TexGenEnabled) {
+	 if (texUnit->TexGenEnabled & S_BIT) {
+	    texUnit->_GenFlags |= texUnit->_GenBitS;
+	 }
+	 if (texUnit->TexGenEnabled & T_BIT) {
+	    texUnit->_GenFlags |= texUnit->_GenBitT;
+	 }
+	 if (texUnit->TexGenEnabled & Q_BIT) {
+	    texUnit->_GenFlags |= texUnit->_GenBitQ;
+	 }
+	 if (texUnit->TexGenEnabled & R_BIT) {
+	    texUnit->_GenFlags |= texUnit->_GenBitR;
+	 }
+
+	 ctx->Texture._TexGenEnabled |= ENABLE_TEXGEN(unit);
+	 ctx->Texture._GenFlags |= texUnit->_GenFlags;
+      }
+
+      if (ctx->TextureMatrixStack[unit].Top->type != MATRIX_IDENTITY)
+	 ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(unit);
+   }
+
+   ctx->Texture._EnabledCoordUnits = ctx->Texture._EnabledUnits;
+   /* Fragment programs may need texture coordinates but not the
+    * corresponding texture images.
+    */
+   if (ctx->FragmentProgram._Enabled) {
+      ctx->Texture._EnabledCoordUnits |=
+         (ctx->FragmentProgram.Current->InputsRead >> FRAG_ATTRIB_TEX0);
+   }
+}
+
+
+void _mesa_update_texture( GLcontext *ctx, GLuint new_state )
+{
+   if (new_state & _NEW_TEXTURE_MATRIX)
+      update_texture_matrices( ctx );
+
+   if (new_state & (_NEW_TEXTURE | _NEW_PROGRAM))
+      update_texture_state( ctx );
+}
+
+/**********************************************************************/
+/*****                      Initialization                        *****/
+/**********************************************************************/
+
+/**
+ * Allocate the proxy textures for the given context.
+ * 
+ * \param ctx the context to allocate proxies for.
+ * 
+ * \return GL_TRUE on success, or GL_FALSE on failure
+ * 
+ * If run out of memory part way through the allocations, clean up and return
+ * GL_FALSE.
+ */
+static GLboolean
+alloc_proxy_textures( GLcontext *ctx )
+{
+   ctx->Texture.Proxy1D = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_1D);
+   if (!ctx->Texture.Proxy1D)
+      goto cleanup;
+
+   ctx->Texture.Proxy2D = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_2D);
+   if (!ctx->Texture.Proxy2D)
+      goto cleanup;
+
+   ctx->Texture.Proxy3D = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_3D);
+   if (!ctx->Texture.Proxy3D)
+      goto cleanup;
+
+   ctx->Texture.ProxyCubeMap = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_CUBE_MAP_ARB);
+   if (!ctx->Texture.ProxyCubeMap)
+      goto cleanup;
+
+   ctx->Texture.ProxyRect = (*ctx->Driver.NewTextureObject)(ctx, 0, GL_TEXTURE_RECTANGLE_NV);
+   if (!ctx->Texture.ProxyRect)
+      goto cleanup;
+
+   return GL_TRUE;
+
+ cleanup:
+   if (ctx->Texture.Proxy1D)
+      (ctx->Driver.DeleteTexture)(ctx, ctx->Texture.Proxy1D);
+   if (ctx->Texture.Proxy2D)
+      (ctx->Driver.DeleteTexture)(ctx, ctx->Texture.Proxy2D);
+   if (ctx->Texture.Proxy3D)
+      (ctx->Driver.DeleteTexture)(ctx, ctx->Texture.Proxy3D);
+   if (ctx->Texture.ProxyCubeMap)
+      (ctx->Driver.DeleteTexture)(ctx, ctx->Texture.ProxyCubeMap);
+   if (ctx->Texture.ProxyRect)
+      (ctx->Driver.DeleteTexture)(ctx, ctx->Texture.ProxyRect);
+   return GL_FALSE;
+}
+
+
+/**
+ * Initialize a texture unit.
+ *
+ * \param ctx GL context.
+ * \param unit texture unit number to be initialized.
+ */
+static void
+init_texture_unit( GLcontext *ctx, GLuint unit )
+{
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+
+   texUnit->EnvMode = GL_MODULATE;
+   ASSIGN_4V( texUnit->EnvColor, 0.0, 0.0, 0.0, 0.0 );
+
+   texUnit->Combine = default_combine_state;
+   texUnit->_EnvMode = default_combine_state;
+   texUnit->_CurrentCombine = & texUnit->_EnvMode;
+
+   texUnit->TexGenEnabled = 0;
+   texUnit->GenModeS = GL_EYE_LINEAR;
+   texUnit->GenModeT = GL_EYE_LINEAR;
+   texUnit->GenModeR = GL_EYE_LINEAR;
+   texUnit->GenModeQ = GL_EYE_LINEAR;
+   texUnit->_GenBitS = TEXGEN_EYE_LINEAR;
+   texUnit->_GenBitT = TEXGEN_EYE_LINEAR;
+   texUnit->_GenBitR = TEXGEN_EYE_LINEAR;
+   texUnit->_GenBitQ = TEXGEN_EYE_LINEAR;
+
+   /* Yes, these plane coefficients are correct! */
+   ASSIGN_4V( texUnit->ObjectPlaneS, 1.0, 0.0, 0.0, 0.0 );
+   ASSIGN_4V( texUnit->ObjectPlaneT, 0.0, 1.0, 0.0, 0.0 );
+   ASSIGN_4V( texUnit->ObjectPlaneR, 0.0, 0.0, 0.0, 0.0 );
+   ASSIGN_4V( texUnit->ObjectPlaneQ, 0.0, 0.0, 0.0, 0.0 );
+   ASSIGN_4V( texUnit->EyePlaneS, 1.0, 0.0, 0.0, 0.0 );
+   ASSIGN_4V( texUnit->EyePlaneT, 0.0, 1.0, 0.0, 0.0 );
+   ASSIGN_4V( texUnit->EyePlaneR, 0.0, 0.0, 0.0, 0.0 );
+   ASSIGN_4V( texUnit->EyePlaneQ, 0.0, 0.0, 0.0, 0.0 );
+
+   texUnit->Current1D = ctx->Shared->Default1D;
+   texUnit->Current2D = ctx->Shared->Default2D;
+   texUnit->Current3D = ctx->Shared->Default3D;
+   texUnit->CurrentCubeMap = ctx->Shared->DefaultCubeMap;
+   texUnit->CurrentRect = ctx->Shared->DefaultRect;
+}
+
+
+GLboolean _mesa_init_texture( GLcontext * ctx )
+{
+   int i;
+
+   assert(MAX_TEXTURE_LEVELS >= MAX_3D_TEXTURE_LEVELS);
+   assert(MAX_TEXTURE_LEVELS >= MAX_CUBE_TEXTURE_LEVELS);
+
+   /* Effectively bind the default textures to all texture units */
+   ctx->Shared->Default1D->RefCount += MAX_TEXTURE_UNITS;
+   ctx->Shared->Default2D->RefCount += MAX_TEXTURE_UNITS;
+   ctx->Shared->Default3D->RefCount += MAX_TEXTURE_UNITS;
+   ctx->Shared->DefaultCubeMap->RefCount += MAX_TEXTURE_UNITS;
+   ctx->Shared->DefaultRect->RefCount += MAX_TEXTURE_UNITS;
+
+   /* Texture group */
+   ctx->Texture.CurrentUnit = 0;      /* multitexture */
+   ctx->Texture._EnabledUnits = 0;
+   for (i=0; i<MAX_TEXTURE_UNITS; i++)
+      init_texture_unit( ctx, i );
+   ctx->Texture.SharedPalette = GL_FALSE;
+   _mesa_init_colortable(&ctx->Texture.Palette);
+
+   /* Allocate proxy textures */
+   if (!alloc_proxy_textures( ctx ))
+      return GL_FALSE;
+
+   return GL_TRUE;
+}
+
+void _mesa_free_texture_data( GLcontext *ctx )
+{
+   int i;
+
+   /* Free proxy texture objects */
+   (ctx->Driver.DeleteTexture)(ctx,  ctx->Texture.Proxy1D );
+   (ctx->Driver.DeleteTexture)(ctx,  ctx->Texture.Proxy2D );
+   (ctx->Driver.DeleteTexture)(ctx,  ctx->Texture.Proxy3D );
+   (ctx->Driver.DeleteTexture)(ctx,  ctx->Texture.ProxyCubeMap );
+   (ctx->Driver.DeleteTexture)(ctx,  ctx->Texture.ProxyRect );
+
+   for (i = 0; i < MAX_TEXTURE_IMAGE_UNITS; i++)
+      _mesa_free_colortable_data( &ctx->Texture.Unit[i].ColorTable );
+
+   _mesa_TexEnvProgramCacheDestroy( ctx );
+}