mesa libXext pixman git update 12 Apr 2011

1 files changed, 1276 insertions, 1274 deletions

diff --git a/mesalib/src/mesa/main/texobj.c b/mesalib/src/mesa/main/texobj.c
index e08842ff6..43d6e52df 100644
--- a/mesalib/src/mesa/main/texobj.c
+++ b/mesalib/src/mesa/main/texobj.c
@@ -1,1274 +1,1276 @@
-/**

- * \file texobj.c

- * Texture object management.

- */

-

-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.

- *

- * Permission is hereby granted, free of charge, to any person obtaining a

- * copy of this software and associated documentation files (the "Software"),

- * to deal in the Software without restriction, including without limitation

- * the rights to use, copy, modify, merge, publish, distribute, sublicense,

- * and/or sell copies of the Software, and to permit persons to whom the

- * Software is furnished to do so, subject to the following conditions:

- *

- * The above copyright notice and this permission notice shall be included

- * in all copies or substantial portions of the Software.

- *

- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

- */

-

-

-#include "mfeatures.h"

-#include "bufferobj.h"

-#include "colortab.h"

-#include "context.h"

-#include "enums.h"

-#include "fbobject.h"

-#include "formats.h"

-#include "hash.h"

-#include "imports.h"

-#include "macros.h"

-#include "teximage.h"

-#include "texobj.h"

-#include "texstate.h"

-#include "mtypes.h"

-#include "program/prog_instruction.h"

-

-

-

-/**********************************************************************/

-/** \name Internal functions */

-/*@{*/

-

-

-/**

- * Return the gl_texture_object for a given ID.

- */

-struct gl_texture_object *

-_mesa_lookup_texture(struct gl_context *ctx, GLuint id)

-{

-   return (struct gl_texture_object *)

-      _mesa_HashLookup(ctx->Shared->TexObjects, id);

-}

-

-

-

-/**

- * Allocate and initialize a new texture object.  But don't put it into the

- * texture object hash table.

- *

- * Called via ctx->Driver.NewTextureObject, unless overridden by a device

- * driver.

- * 

- * \param shared the shared GL state structure to contain the texture object

- * \param name integer name for the texture object

- * \param target either GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D,

- * GL_TEXTURE_CUBE_MAP_ARB or GL_TEXTURE_RECTANGLE_NV.  zero is ok for the sake

- * of GenTextures()

- *

- * \return pointer to new texture object.

- */

-struct gl_texture_object *

-_mesa_new_texture_object( struct gl_context *ctx, GLuint name, GLenum target )

-{

-   struct gl_texture_object *obj;

-   (void) ctx;

-   obj = MALLOC_STRUCT(gl_texture_object);

-   _mesa_initialize_texture_object(obj, name, target);

-   return obj;

-}

-

-

-/**

- * Initialize a new texture object to default values.

- * \param obj  the texture object

- * \param name  the texture name

- * \param target  the texture target

- */

-void

-_mesa_initialize_texture_object( struct gl_texture_object *obj,

-                                 GLuint name, GLenum target )

-{

-   ASSERT(target == 0 ||

-          target == GL_TEXTURE_1D ||

-          target == GL_TEXTURE_2D ||

-          target == GL_TEXTURE_3D ||

-          target == GL_TEXTURE_CUBE_MAP_ARB ||

-          target == GL_TEXTURE_RECTANGLE_NV ||

-          target == GL_TEXTURE_1D_ARRAY_EXT ||

-          target == GL_TEXTURE_2D_ARRAY_EXT ||

-          target == GL_TEXTURE_BUFFER);

-

-   memset(obj, 0, sizeof(*obj));

-   /* init the non-zero fields */

-   _glthread_INIT_MUTEX(obj->Mutex);

-   obj->RefCount = 1;

-   obj->Name = name;

-   obj->Target = target;

-   obj->Priority = 1.0F;

-   if (target == GL_TEXTURE_RECTANGLE_NV) {

-      obj->WrapS = GL_CLAMP_TO_EDGE;

-      obj->WrapT = GL_CLAMP_TO_EDGE;

-      obj->WrapR = GL_CLAMP_TO_EDGE;

-      obj->MinFilter = GL_LINEAR;

-   }

-   else {

-      obj->WrapS = GL_REPEAT;

-      obj->WrapT = GL_REPEAT;

-      obj->WrapR = GL_REPEAT;

-      obj->MinFilter = GL_NEAREST_MIPMAP_LINEAR;

-   }

-   obj->MagFilter = GL_LINEAR;

-   obj->MinLod = -1000.0;

-   obj->MaxLod = 1000.0;

-   obj->LodBias = 0.0;

-   obj->BaseLevel = 0;

-   obj->MaxLevel = 1000;

-   obj->MaxAnisotropy = 1.0;

-   obj->CompareMode = GL_NONE;         /* ARB_shadow */

-   obj->CompareFunc = GL_LEQUAL;       /* ARB_shadow */

-   obj->CompareFailValue = 0.0F;       /* ARB_shadow_ambient */

-   obj->DepthMode = GL_LUMINANCE;      /* ARB_depth_texture */

-   obj->Swizzle[0] = GL_RED;

-   obj->Swizzle[1] = GL_GREEN;

-   obj->Swizzle[2] = GL_BLUE;

-   obj->Swizzle[3] = GL_ALPHA;

-   obj->_Swizzle = SWIZZLE_NOOP;

-   obj->sRGBDecode = GL_DECODE_EXT;

-}

-

-

-/**

- * Some texture initialization can't be finished until we know which

- * target it's getting bound to (GL_TEXTURE_1D/2D/etc).

- */

-static void

-finish_texture_init(struct gl_context *ctx, GLenum target,

-                    struct gl_texture_object *obj)

-{

-   assert(obj->Target == 0);

-

-   if (target == GL_TEXTURE_RECTANGLE_NV) {

-      /* have to init wrap and filter state here - kind of klunky */

-      obj->WrapS = GL_CLAMP_TO_EDGE;

-      obj->WrapT = GL_CLAMP_TO_EDGE;

-      obj->WrapR = GL_CLAMP_TO_EDGE;

-      obj->MinFilter = GL_LINEAR;

-      if (ctx->Driver.TexParameter) {

-         static const GLfloat fparam_wrap[1] = {(GLfloat) GL_CLAMP_TO_EDGE};

-         static const GLfloat fparam_filter[1] = {(GLfloat) GL_LINEAR};

-         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_WRAP_S, fparam_wrap);

-         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_WRAP_T, fparam_wrap);

-         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_WRAP_R, fparam_wrap);

-         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_MIN_FILTER, fparam_filter);

-      }

-   }

-}

-

-

-/**

- * Deallocate a texture object struct.  It should have already been

- * removed from the texture object pool.

- * Called via ctx->Driver.DeleteTexture() if not overriden by a driver.

- *

- * \param shared the shared GL state to which the object belongs.

- * \param texObj the texture object to delete.

- */

-void

-_mesa_delete_texture_object(struct gl_context *ctx,

-                            struct gl_texture_object *texObj)

-{

-   GLuint i, face;

-

-   /* Set Target to an invalid value.  With some assertions elsewhere

-    * we can try to detect possible use of deleted textures.

-    */

-   texObj->Target = 0x99;

-

-   _mesa_free_colortable_data(&texObj->Palette);

-

-   /* free the texture images */

-   for (face = 0; face < 6; face++) {

-      for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {

-         if (texObj->Image[face][i]) {

-            _mesa_delete_texture_image( ctx, texObj->Image[face][i] );

-         }

-      }

-   }

-

-   _mesa_reference_buffer_object(ctx, &texObj->BufferObject, NULL);

-

-   /* destroy the mutex -- it may have allocated memory (eg on bsd) */

-   _glthread_DESTROY_MUTEX(texObj->Mutex);

-

-   /* free this object */

-   free(texObj);

-}

-

-

-

-/**

- * Copy texture object state from one texture object to another.

- * Use for glPush/PopAttrib.

- *

- * \param dest destination texture object.

- * \param src source texture object.

- */

-void

-_mesa_copy_texture_object( struct gl_texture_object *dest,

-                           const struct gl_texture_object *src )

-{

-   dest->Target = src->Target;

-   dest->Name = src->Name;

-   dest->Priority = src->Priority;

-   dest->BorderColor.f[0] = src->BorderColor.f[0];

-   dest->BorderColor.f[1] = src->BorderColor.f[1];

-   dest->BorderColor.f[2] = src->BorderColor.f[2];

-   dest->BorderColor.f[3] = src->BorderColor.f[3];

-   dest->WrapS = src->WrapS;

-   dest->WrapT = src->WrapT;

-   dest->WrapR = src->WrapR;

-   dest->MinFilter = src->MinFilter;

-   dest->MagFilter = src->MagFilter;

-   dest->MinLod = src->MinLod;

-   dest->MaxLod = src->MaxLod;

-   dest->LodBias = src->LodBias;

-   dest->BaseLevel = src->BaseLevel;

-   dest->MaxLevel = src->MaxLevel;

-   dest->MaxAnisotropy = src->MaxAnisotropy;

-   dest->CompareMode = src->CompareMode;

-   dest->CompareFunc = src->CompareFunc;

-   dest->CompareFailValue = src->CompareFailValue;

-   dest->DepthMode = src->DepthMode;

-   dest->_MaxLevel = src->_MaxLevel;

-   dest->_MaxLambda = src->_MaxLambda;

-   dest->GenerateMipmap = src->GenerateMipmap;

-   dest->Palette = src->Palette;

-   dest->_Complete = src->_Complete;

-   COPY_4V(dest->Swizzle, src->Swizzle);

-   dest->_Swizzle = src->_Swizzle;

-}

-

-

-/**

- * Free all texture images of the given texture object.

- *

- * \param ctx GL context.

- * \param t texture object.

- *

- * \sa _mesa_clear_texture_image().

- */

-void

-_mesa_clear_texture_object(struct gl_context *ctx,

-                           struct gl_texture_object *texObj)

-{

-   GLuint i, j;

-

-   if (texObj->Target == 0)

-      return;

-

-   for (i = 0; i < MAX_FACES; i++) {

-      for (j = 0; j < MAX_TEXTURE_LEVELS; j++) {

-         struct gl_texture_image *texImage = texObj->Image[i][j];

-         if (texImage)

-            _mesa_clear_texture_image(ctx, texImage);

-      }

-   }

-}

-

-

-/**

- * Check if the given texture object is valid by examining its Target field.

- * For debugging only.

- */

-static GLboolean

-valid_texture_object(const struct gl_texture_object *tex)

-{

-   switch (tex->Target) {

-   case 0:

-   case GL_TEXTURE_1D:

-   case GL_TEXTURE_2D:

-   case GL_TEXTURE_3D:

-   case GL_TEXTURE_CUBE_MAP_ARB:

-   case GL_TEXTURE_RECTANGLE_NV:

-   case GL_TEXTURE_1D_ARRAY_EXT:

-   case GL_TEXTURE_2D_ARRAY_EXT:

-   case GL_TEXTURE_BUFFER:

-      return GL_TRUE;

-   case 0x99:

-      _mesa_problem(NULL, "invalid reference to a deleted texture object");

-      return GL_FALSE;

-   default:

-      _mesa_problem(NULL, "invalid texture object Target 0x%x, Id = %u",

-                    tex->Target, tex->Name);

-      return GL_FALSE;

-   }

-}

-

-

-/**

- * Reference (or unreference) a texture object.

- * If '*ptr', decrement *ptr's refcount (and delete if it becomes zero).

- * If 'tex' is non-null, increment its refcount.

- */

-void

-_mesa_reference_texobj(struct gl_texture_object **ptr,

-                       struct gl_texture_object *tex)

-{

-   assert(ptr);

-   if (*ptr == tex) {

-      /* no change */

-      return;

-   }

-

-   if (*ptr) {

-      /* Unreference the old texture */

-      GLboolean deleteFlag = GL_FALSE;

-      struct gl_texture_object *oldTex = *ptr;

-

-      ASSERT(valid_texture_object(oldTex));

-      (void) valid_texture_object; /* silence warning in release builds */

-

-      _glthread_LOCK_MUTEX(oldTex->Mutex);

-      ASSERT(oldTex->RefCount > 0);

-      oldTex->RefCount--;

-

-      deleteFlag = (oldTex->RefCount == 0);

-      _glthread_UNLOCK_MUTEX(oldTex->Mutex);

-

-      if (deleteFlag) {

-         GET_CURRENT_CONTEXT(ctx);

-         if (ctx)

-            ctx->Driver.DeleteTexture(ctx, oldTex);

-         else

-            _mesa_problem(NULL, "Unable to delete texture, no context");

-      }

-

-      *ptr = NULL;

-   }

-   assert(!*ptr);

-

-   if (tex) {

-      /* reference new texture */

-      ASSERT(valid_texture_object(tex));

-      _glthread_LOCK_MUTEX(tex->Mutex);

-      if (tex->RefCount == 0) {

-         /* this texture's being deleted (look just above) */

-         /* Not sure this can every really happen.  Warn if it does. */

-         _mesa_problem(NULL, "referencing deleted texture object");

-         *ptr = NULL;

-      }

-      else {

-         tex->RefCount++;

-         *ptr = tex;

-      }

-      _glthread_UNLOCK_MUTEX(tex->Mutex);

-   }

-}

-

-

-

-/**

- * Mark a texture object as incomplete.

- * \param t  texture object

- * \param fmt...  string describing why it's incomplete (for debugging).

- */

-static void

-incomplete(struct gl_texture_object *t, const char *fmt, ...)

-{

-#if 0

-   va_list args;

-   char s[100];

-

-   va_start(args, fmt);

-   vsnprintf(s, sizeof(s), fmt, args);

-   va_end(args);

-

-   printf("Texture Obj %d incomplete because: %s\n", t->Name, s);

-#endif

-   t->_Complete = GL_FALSE;

-}

-

-

-/**

- * Examine a texture object to determine if it is complete.

- *

- * The gl_texture_object::Complete flag will be set to GL_TRUE or GL_FALSE

- * accordingly.

- *

- * \param ctx GL context.

- * \param t texture object.

- *

- * According to the texture target, verifies that each of the mipmaps is

- * present and has the expected size.

- */

-void

-_mesa_test_texobj_completeness( const struct gl_context *ctx,

-                                struct gl_texture_object *t )

-{

-   const GLint baseLevel = t->BaseLevel;

-   GLint maxLog2 = 0, maxLevels = 0;

-

-   t->_Complete = GL_TRUE;  /* be optimistic */

-

-   /* Detect cases where the application set the base level to an invalid

-    * value.

-    */

-   if ((baseLevel < 0) || (baseLevel >= MAX_TEXTURE_LEVELS)) {

-      incomplete(t, "base level = %d is invalid", baseLevel);

-      return;

-   }

-

-   /* Always need the base level image */

-   if (!t->Image[0][baseLevel]) {

-      incomplete(t, "Image[baseLevel=%d] == NULL", baseLevel);

-      return;

-   }

-

-   /* Check width/height/depth for zero */

-   if (t->Image[0][baseLevel]->Width == 0 ||

-       t->Image[0][baseLevel]->Height == 0 ||

-       t->Image[0][baseLevel]->Depth == 0) {

-      incomplete(t, "texture width = 0");

-      return;

-   }

-

-   /* Compute _MaxLevel */

-   if ((t->Target == GL_TEXTURE_1D) ||

-       (t->Target == GL_TEXTURE_1D_ARRAY_EXT)) {

-      maxLog2 = t->Image[0][baseLevel]->WidthLog2;

-      maxLevels = ctx->Const.MaxTextureLevels;

-   }

-   else if ((t->Target == GL_TEXTURE_2D) ||

-            (t->Target == GL_TEXTURE_2D_ARRAY_EXT)) {

-      maxLog2 = MAX2(t->Image[0][baseLevel]->WidthLog2,

-                     t->Image[0][baseLevel]->HeightLog2);

-      maxLevels = ctx->Const.MaxTextureLevels;

-   }

-   else if (t->Target == GL_TEXTURE_3D) {

-      GLint max = MAX2(t->Image[0][baseLevel]->WidthLog2,

-                       t->Image[0][baseLevel]->HeightLog2);

-      maxLog2 = MAX2(max, (GLint)(t->Image[0][baseLevel]->DepthLog2));

-      maxLevels = ctx->Const.Max3DTextureLevels;

-   }

-   else if (t->Target == GL_TEXTURE_CUBE_MAP_ARB) {

-      maxLog2 = MAX2(t->Image[0][baseLevel]->WidthLog2,

-                     t->Image[0][baseLevel]->HeightLog2);

-      maxLevels = ctx->Const.MaxCubeTextureLevels;

-   }

-   else if (t->Target == GL_TEXTURE_RECTANGLE_NV) {

-      maxLog2 = 0;  /* not applicable */

-      maxLevels = 1;  /* no mipmapping */

-   }

-   else {

-      _mesa_problem(ctx, "Bad t->Target in _mesa_test_texobj_completeness");

-      return;

-   }

-

-   ASSERT(maxLevels > 0);

-

-   if (t->MaxLevel < t->BaseLevel) {

-      incomplete(t, "MAX_LEVEL (%d) < BASE_LEVEL (%d)",

-		 t->MaxLevel, t->BaseLevel);

-      return;

-   }

-

-   t->_MaxLevel = baseLevel + maxLog2;

-   t->_MaxLevel = MIN2(t->_MaxLevel, t->MaxLevel);

-   t->_MaxLevel = MIN2(t->_MaxLevel, maxLevels - 1);

-

-   /* Compute _MaxLambda = q - b (see the 1.2 spec) used during mipmapping */

-   t->_MaxLambda = (GLfloat) (t->_MaxLevel - t->BaseLevel);

-

-   if (t->Target == GL_TEXTURE_CUBE_MAP_ARB) {

-      /* make sure that all six cube map level 0 images are the same size */

-      const GLuint w = t->Image[0][baseLevel]->Width2;

-      const GLuint h = t->Image[0][baseLevel]->Height2;

-      GLuint face;

-      for (face = 1; face < 6; face++) {

-         if (t->Image[face][baseLevel] == NULL ||

-             t->Image[face][baseLevel]->Width2 != w ||

-             t->Image[face][baseLevel]->Height2 != h) {

-            incomplete(t, "Cube face missing or mismatched size");

-            return;

-         }

-      }

-   }

-

-   /* extra checking for mipmaps */

-   if (t->MinFilter != GL_NEAREST && t->MinFilter != GL_LINEAR) {

-      /*

-       * Mipmapping: determine if we have a complete set of mipmaps

-       */

-      GLint i;

-      GLint minLevel = baseLevel;

-      GLint maxLevel = t->_MaxLevel;

-

-      if (minLevel > maxLevel) {

-         incomplete(t, "minLevel > maxLevel");

-         return;

-      }

-

-      /* Test dimension-independent attributes */

-      for (i = minLevel; i <= maxLevel; i++) {

-         if (t->Image[0][i]) {

-            if (t->Image[0][i]->TexFormat != t->Image[0][baseLevel]->TexFormat) {

-               incomplete(t, "Format[i] != Format[baseLevel]");

-               return;

-            }

-            if (t->Image[0][i]->Border != t->Image[0][baseLevel]->Border) {

-               incomplete(t, "Border[i] != Border[baseLevel]");

-               return;

-            }

-         }

-      }

-

-      /* Test things which depend on number of texture image dimensions */

-      if ((t->Target == GL_TEXTURE_1D) ||

-          (t->Target == GL_TEXTURE_1D_ARRAY_EXT)) {

-         /* Test 1-D mipmaps */

-         GLuint width = t->Image[0][baseLevel]->Width2;

-         for (i = baseLevel + 1; i < maxLevels; i++) {

-            if (width > 1) {

-               width /= 2;

-            }

-            if (i >= minLevel && i <= maxLevel) {

-               if (!t->Image[0][i]) {

-                  incomplete(t, "1D Image[0][i] == NULL");

-                  return;

-               }

-               if (t->Image[0][i]->Width2 != width ) {

-                  incomplete(t, "1D Image[0][i] bad width");

-                  return;

-               }

-            }

-            if (width == 1) {

-               return;  /* found smallest needed mipmap, all done! */

-            }

-         }

-      }

-      else if ((t->Target == GL_TEXTURE_2D) ||

-               (t->Target == GL_TEXTURE_2D_ARRAY_EXT)) {

-         /* Test 2-D mipmaps */

-         GLuint width = t->Image[0][baseLevel]->Width2;

-         GLuint height = t->Image[0][baseLevel]->Height2;

-         for (i = baseLevel + 1; i < maxLevels; i++) {

-            if (width > 1) {

-               width /= 2;

-            }

-            if (height > 1) {

-               height /= 2;

-            }

-            if (i >= minLevel && i <= maxLevel) {

-               if (!t->Image[0][i]) {

-                  incomplete(t, "2D Image[0][i] == NULL");

-                  return;

-               }

-               if (t->Image[0][i]->Width2 != width) {

-                  incomplete(t, "2D Image[0][i] bad width");

-                  return;

-               }

-               if (t->Image[0][i]->Height2 != height) {

-                  incomplete(t, "2D Image[0][i] bad height");

-                  return;

-               }

-               if (width==1 && height==1) {

-                  return;  /* found smallest needed mipmap, all done! */

-               }

-            }

-         }

-      }

-      else if (t->Target == GL_TEXTURE_3D) {

-         /* Test 3-D mipmaps */

-         GLuint width = t->Image[0][baseLevel]->Width2;

-         GLuint height = t->Image[0][baseLevel]->Height2;

-         GLuint depth = t->Image[0][baseLevel]->Depth2;

-         for (i = baseLevel + 1; i < maxLevels; i++) {

-            if (width > 1) {

-               width /= 2;

-            }

-            if (height > 1) {

-               height /= 2;

-            }

-            if (depth > 1) {

-               depth /= 2;

-            }

-            if (i >= minLevel && i <= maxLevel) {

-               if (!t->Image[0][i]) {

-                  incomplete(t, "3D Image[0][i] == NULL");

-                  return;

-               }

-               if (t->Image[0][i]->_BaseFormat == GL_DEPTH_COMPONENT) {

-                  incomplete(t, "GL_DEPTH_COMPONENT only works with 1/2D tex");

-                  return;

-               }

-               if (t->Image[0][i]->Width2 != width) {

-                  incomplete(t, "3D Image[0][i] bad width");

-                  return;

-               }

-               if (t->Image[0][i]->Height2 != height) {

-                  incomplete(t, "3D Image[0][i] bad height");

-                  return;

-               }

-               if (t->Image[0][i]->Depth2 != depth) {

-                  incomplete(t, "3D Image[0][i] bad depth");

-                  return;

-               }

-            }

-            if (width == 1 && height == 1 && depth == 1) {

-               return;  /* found smallest needed mipmap, all done! */

-            }

-         }

-      }

-      else if (t->Target == GL_TEXTURE_CUBE_MAP_ARB) {

-         /* make sure 6 cube faces are consistant */

-         GLuint width = t->Image[0][baseLevel]->Width2;

-         GLuint height = t->Image[0][baseLevel]->Height2;

-         for (i = baseLevel + 1; i < maxLevels; i++) {

-            if (width > 1) {

-               width /= 2;

-            }

-            if (height > 1) {

-               height /= 2;

-            }

-            if (i >= minLevel && i <= maxLevel) {

-	       GLuint face;

-	       for (face = 0; face < 6; face++) {

-		  /* check that we have images defined */

-		  if (!t->Image[face][i]) {

-		     incomplete(t, "CubeMap Image[n][i] == NULL");

-		     return;

-		  }

-		  /* Don't support GL_DEPTH_COMPONENT for cube maps */

-		  if (t->Image[face][i]->_BaseFormat == GL_DEPTH_COMPONENT) {

-		     incomplete(t, "GL_DEPTH_COMPONENT only works with 1/2D tex");

-		     return;

-		  }

-		  /* check that all six images have same size */

-                  if (t->Image[face][i]->Width2 != width || 

-                      t->Image[face][i]->Height2 != height) {

-		     incomplete(t, "CubeMap Image[n][i] bad size");

-		     return;

-		  }

-	       }

-	    }

-	    if (width == 1 && height == 1) {

-	       return;  /* found smallest needed mipmap, all done! */

-            }

-         }

-      }

-      else if (t->Target == GL_TEXTURE_RECTANGLE_NV) {

-         /* XXX special checking? */

-      }

-      else {

-         /* Target = ??? */

-         _mesa_problem(ctx, "Bug in gl_test_texture_object_completeness\n");

-      }

-   }

-}

-

-

-/**

- * Check if the given cube map texture is "cube complete" as defined in

- * the OpenGL specification.

- */

-GLboolean

-_mesa_cube_complete(const struct gl_texture_object *texObj)

-{

-   const GLint baseLevel = texObj->BaseLevel;

-   const struct gl_texture_image *img0, *img;

-   GLuint face;

-

-   if (texObj->Target != GL_TEXTURE_CUBE_MAP)

-      return GL_FALSE;

-

-   if ((baseLevel < 0) || (baseLevel >= MAX_TEXTURE_LEVELS))

-      return GL_FALSE;

-

-   /* check first face */

-   img0 = texObj->Image[0][baseLevel];

-   if (!img0 ||

-       img0->Width < 1 ||

-       img0->Width != img0->Height)

-      return GL_FALSE;

-

-   /* check remaining faces vs. first face */

-   for (face = 1; face < 6; face++) {

-      img = texObj->Image[face][baseLevel];

-      if (!img ||

-          img->Width != img0->Width ||

-          img->Height != img0->Height ||

-          img->TexFormat != img0->TexFormat)

-         return GL_FALSE;

-   }

-

-   return GL_TRUE;

-}

-

-

-/**

- * Mark a texture object dirty.  It forces the object to be incomplete

- * and optionally forces the context to re-validate its state.

- *

- * \param ctx GL context.

- * \param texObj texture object.

- * \param invalidate_state also invalidate context state.

- */

-void

-_mesa_dirty_texobj(struct gl_context *ctx, struct gl_texture_object *texObj,

-                   GLboolean invalidate_state)

-{

-   texObj->_Complete = GL_FALSE;

-   if (invalidate_state)

-      ctx->NewState |= _NEW_TEXTURE;

-}

-

-

-/**

- * Return pointer to a default/fallback texture.

- * The texture is a 2D 8x8 RGBA texture with all texels = (0,0,0,1).

- * That's the value a sampler should get when sampling from an

- * incomplete texture.

- */

-struct gl_texture_object *

-_mesa_get_fallback_texture(struct gl_context *ctx)

-{

-   if (!ctx->Shared->FallbackTex) {

-      /* create fallback texture now */

-      static GLubyte texels[8 * 8][4];

-      struct gl_texture_object *texObj;

-      struct gl_texture_image *texImage;

-      gl_format texFormat;

-      GLuint i;

-

-      for (i = 0; i < 8 * 8; i++) {

-         texels[i][0] =

-         texels[i][1] =

-         texels[i][2] = 0x0;

-         texels[i][3] = 0xff;

-      }

-

-      /* create texture object */

-      texObj = ctx->Driver.NewTextureObject(ctx, 0, GL_TEXTURE_2D);

-      assert(texObj->RefCount == 1);

-      texObj->MinFilter = GL_NEAREST;

-      texObj->MagFilter = GL_NEAREST;

-

-      /* create level[0] texture image */

-      texImage = _mesa_get_tex_image(ctx, texObj, GL_TEXTURE_2D, 0);

-

-      texFormat = ctx->Driver.ChooseTextureFormat(ctx, GL_RGBA, GL_RGBA,

-                                                  GL_UNSIGNED_BYTE);

-

-      /* init the image fields */

-      _mesa_init_teximage_fields(ctx, GL_TEXTURE_2D, texImage,

-                                 8, 8, 1, 0, GL_RGBA, texFormat); 

-

-      ASSERT(texImage->TexFormat != MESA_FORMAT_NONE);

-

-      /* set image data */

-      ctx->Driver.TexImage2D(ctx, GL_TEXTURE_2D, 0, GL_RGBA,

-                             8, 8, 0,

-                             GL_RGBA, GL_UNSIGNED_BYTE, texels,

-                             &ctx->DefaultPacking, texObj, texImage);

-

-      _mesa_test_texobj_completeness(ctx, texObj);

-      assert(texObj->_Complete);

-

-      ctx->Shared->FallbackTex = texObj;

-   }

-   return ctx->Shared->FallbackTex;

-}

-

-

-/*@}*/

-

-

-/***********************************************************************/

-/** \name API functions */

-/*@{*/

-

-

-/**

- * Generate texture names.

- *

- * \param n number of texture names to be generated.

- * \param textures an array in which will hold the generated texture names.

- *

- * \sa glGenTextures().

- *

- * Calls _mesa_HashFindFreeKeyBlock() to find a block of free texture

- * IDs which are stored in \p textures.  Corresponding empty texture

- * objects are also generated.

- */ 

-void GLAPIENTRY

-_mesa_GenTextures( GLsizei n, GLuint *textures )

-{

-   GET_CURRENT_CONTEXT(ctx);

-   GLuint first;

-   GLint i;

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   if (n < 0) {

-      _mesa_error( ctx, GL_INVALID_VALUE, "glGenTextures" );

-      return;

-   }

-

-   if (!textures)

-      return;

-

-   /*

-    * This must be atomic (generation and allocation of texture IDs)

-    */

-   _glthread_LOCK_MUTEX(ctx->Shared->Mutex);

-

-   first = _mesa_HashFindFreeKeyBlock(ctx->Shared->TexObjects, n);

-

-   /* Allocate new, empty texture objects */

-   for (i = 0; i < n; i++) {

-      struct gl_texture_object *texObj;

-      GLuint name = first + i;

-      GLenum target = 0;

-      texObj = (*ctx->Driver.NewTextureObject)( ctx, name, target);

-      if (!texObj) {

-         _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);

-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTextures");

-         return;

-      }

-

-      /* insert into hash table */

-      _mesa_HashInsert(ctx->Shared->TexObjects, texObj->Name, texObj);

-

-      textures[i] = name;

-   }

-

-   _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);

-}

-

-

-/**

- * Check if the given texture object is bound to the current draw or

- * read framebuffer.  If so, Unbind it.

- */

-static void

-unbind_texobj_from_fbo(struct gl_context *ctx,

-                       struct gl_texture_object *texObj)

-{

-   const GLuint n = (ctx->DrawBuffer == ctx->ReadBuffer) ? 1 : 2;

-   GLuint i;

-

-   for (i = 0; i < n; i++) {

-      struct gl_framebuffer *fb = (i == 0) ? ctx->DrawBuffer : ctx->ReadBuffer;

-      if (fb->Name) {

-         GLuint j;

-         for (j = 0; j < BUFFER_COUNT; j++) {

-            if (fb->Attachment[j].Type == GL_TEXTURE &&

-                fb->Attachment[j].Texture == texObj) {

-               _mesa_remove_attachment(ctx, fb->Attachment + j);         

-            }

-         }

-      }

-   }

-}

-

-

-/**

- * Check if the given texture object is bound to any texture image units and

- * unbind it if so (revert to default textures).

- */

-static void

-unbind_texobj_from_texunits(struct gl_context *ctx,

-                            struct gl_texture_object *texObj)

-{

-   GLuint u, tex;

-

-   for (u = 0; u < MAX_TEXTURE_IMAGE_UNITS; u++) {

-      struct gl_texture_unit *unit = &ctx->Texture.Unit[u];

-      for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {

-         if (texObj == unit->CurrentTex[tex]) {

-            _mesa_reference_texobj(&unit->CurrentTex[tex],

-                                   ctx->Shared->DefaultTex[tex]);

-            ASSERT(unit->CurrentTex[tex]);

-            break;

-         }

-      }

-   }

-}

-

-

-/**

- * Delete named textures.

- *

- * \param n number of textures to be deleted.

- * \param textures array of texture IDs to be deleted.

- *

- * \sa glDeleteTextures().

- *

- * If we're about to delete a texture that's currently bound to any

- * texture unit, unbind the texture first.  Decrement the reference

- * count on the texture object and delete it if it's zero.

- * Recall that texture objects can be shared among several rendering

- * contexts.

- */

-void GLAPIENTRY

-_mesa_DeleteTextures( GLsizei n, const GLuint *textures)

-{

-   GET_CURRENT_CONTEXT(ctx);

-   GLint i;

-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */

-

-   if (!textures)

-      return;

-

-   for (i = 0; i < n; i++) {

-      if (textures[i] > 0) {

-         struct gl_texture_object *delObj

-            = _mesa_lookup_texture(ctx, textures[i]);

-

-         if (delObj) {

-            _mesa_lock_texture(ctx, delObj);

-

-            /* Check if texture is bound to any framebuffer objects.

-             * If so, unbind.

-             * See section 4.4.2.3 of GL_EXT_framebuffer_object.

-             */

-            unbind_texobj_from_fbo(ctx, delObj);

-

-            /* Check if this texture is currently bound to any texture units.

-             * If so, unbind it.

-             */

-            unbind_texobj_from_texunits(ctx, delObj);

-

-            _mesa_unlock_texture(ctx, delObj);

-

-            ctx->NewState |= _NEW_TEXTURE;

-

-            /* The texture _name_ is now free for re-use.

-             * Remove it from the hash table now.

-             */

-            _glthread_LOCK_MUTEX(ctx->Shared->Mutex);

-            _mesa_HashRemove(ctx->Shared->TexObjects, delObj->Name);

-            _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);

-

-            /* Unreference the texobj.  If refcount hits zero, the texture

-             * will be deleted.

-             */

-            _mesa_reference_texobj(&delObj, NULL);

-         }

-      }

-   }

-}

-

-

-/**

- * Convert a GL texture target enum such as GL_TEXTURE_2D or GL_TEXTURE_3D

- * into the corresponding Mesa texture target index.

- * Note that proxy targets are not valid here.

- * \return TEXTURE_x_INDEX or -1 if target is invalid

- */

-static GLint

-target_enum_to_index(GLenum target)

-{

-   switch (target) {

-   case GL_TEXTURE_1D:

-      return TEXTURE_1D_INDEX;

-   case GL_TEXTURE_2D:

-      return TEXTURE_2D_INDEX;

-   case GL_TEXTURE_3D:

-      return TEXTURE_3D_INDEX;

-   case GL_TEXTURE_CUBE_MAP_ARB:

-      return TEXTURE_CUBE_INDEX;

-   case GL_TEXTURE_RECTANGLE_NV:

-      return TEXTURE_RECT_INDEX;

-   case GL_TEXTURE_1D_ARRAY_EXT:

-      return TEXTURE_1D_ARRAY_INDEX;

-   case GL_TEXTURE_2D_ARRAY_EXT:

-      return TEXTURE_2D_ARRAY_INDEX;

-   case GL_TEXTURE_BUFFER_ARB:

-      return TEXTURE_BUFFER_INDEX;

-   default:

-      return -1;

-   }

-}

-

-

-/**

- * Bind a named texture to a texturing target.

- * 

- * \param target texture target.

- * \param texName texture name.

- * 

- * \sa glBindTexture().

- *

- * Determines the old texture object bound and returns immediately if rebinding

- * the same texture.  Get the current texture which is either a default texture

- * if name is null, a named texture from the hash, or a new texture if the

- * given texture name is new. Increments its reference count, binds it, and

- * calls dd_function_table::BindTexture. Decrements the old texture reference

- * count and deletes it if it reaches zero.

- */

-void GLAPIENTRY

-_mesa_BindTexture( GLenum target, GLuint texName )

-{

-   GET_CURRENT_CONTEXT(ctx);

-   struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);

-   struct gl_texture_object *newTexObj = NULL;

-   GLint targetIndex;

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))

-      _mesa_debug(ctx, "glBindTexture %s %d\n",

-                  _mesa_lookup_enum_by_nr(target), (GLint) texName);

-

-   targetIndex = target_enum_to_index(target);

-   if (targetIndex < 0) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glBindTexture(target)");

-      return;

-   }

-   assert(targetIndex < NUM_TEXTURE_TARGETS);

-

-   /*

-    * Get pointer to new texture object (newTexObj)

-    */

-   if (texName == 0) {

-      /* Use a default texture object */

-      newTexObj = ctx->Shared->DefaultTex[targetIndex];

-   }

-   else {

-      /* non-default texture object */

-      newTexObj = _mesa_lookup_texture(ctx, texName);

-      if (newTexObj) {

-         /* error checking */

-         if (newTexObj->Target != 0 && newTexObj->Target != target) {

-            /* the named texture object's target doesn't match the given target */

-            _mesa_error( ctx, GL_INVALID_OPERATION,

-                         "glBindTexture(target mismatch)" );

-            return;

-         }

-         if (newTexObj->Target == 0) {

-            finish_texture_init(ctx, target, newTexObj);

-         }

-      }

-      else {

-         /* if this is a new texture id, allocate a texture object now */

-         newTexObj = (*ctx->Driver.NewTextureObject)(ctx, texName, target);

-         if (!newTexObj) {

-            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindTexture");

-            return;

-         }

-

-         /* and insert it into hash table */

-         _glthread_LOCK_MUTEX(ctx->Shared->Mutex);

-         _mesa_HashInsert(ctx->Shared->TexObjects, texName, newTexObj);

-         _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);

-      }

-      newTexObj->Target = target;

-   }

-

-   assert(valid_texture_object(newTexObj));

-

-   /* Check if this texture is only used by this context and is already bound.

-    * If so, just return.

-    */

-   {

-      GLboolean early_out;

-      _glthread_LOCK_MUTEX(ctx->Shared->Mutex);

-      early_out = ((ctx->Shared->RefCount == 1)

-                   && (newTexObj == texUnit->CurrentTex[targetIndex]));

-      _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);

-      if (early_out) {

-         return;

-      }

-   }

-

-   /* flush before changing binding */

-   FLUSH_VERTICES(ctx, _NEW_TEXTURE);

-

-   /* Do the actual binding.  The refcount on the previously bound

-    * texture object will be decremented.  It'll be deleted if the

-    * count hits zero.

-    */

-   _mesa_reference_texobj(&texUnit->CurrentTex[targetIndex], newTexObj);

-   ASSERT(texUnit->CurrentTex[targetIndex]);

-

-   /* Pass BindTexture call to device driver */

-   if (ctx->Driver.BindTexture)

-      (*ctx->Driver.BindTexture)( ctx, target, newTexObj );

-}

-

-

-/**

- * Set texture priorities.

- * 

- * \param n number of textures.

- * \param texName texture names.

- * \param priorities corresponding texture priorities.

- * 

- * \sa glPrioritizeTextures().

- * 

- * Looks up each texture in the hash, clamps the corresponding priority between

- * 0.0 and 1.0, and calls dd_function_table::PrioritizeTexture.

- */

-void GLAPIENTRY

-_mesa_PrioritizeTextures( GLsizei n, const GLuint *texName,

-                          const GLclampf *priorities )

-{

-   GET_CURRENT_CONTEXT(ctx);

-   GLint i;

-   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

-

-   if (n < 0) {

-      _mesa_error( ctx, GL_INVALID_VALUE, "glPrioritizeTextures" );

-      return;

-   }

-

-   if (!priorities)

-      return;

-

-   for (i = 0; i < n; i++) {

-      if (texName[i] > 0) {

-         struct gl_texture_object *t = _mesa_lookup_texture(ctx, texName[i]);

-         if (t) {

-            t->Priority = CLAMP( priorities[i], 0.0F, 1.0F );

-         }

-      }

-   }

-

-   ctx->NewState |= _NEW_TEXTURE;

-}

-

-

-

-/**

- * See if textures are loaded in texture memory.

- * 

- * \param n number of textures to query.

- * \param texName array with the texture names.

- * \param residences array which will hold the residence status.

- *

- * \return GL_TRUE if all textures are resident and \p residences is left unchanged, 

- * 

- * \sa glAreTexturesResident().

- *

- * Looks up each texture in the hash and calls

- * dd_function_table::IsTextureResident.

- */

-GLboolean GLAPIENTRY

-_mesa_AreTexturesResident(GLsizei n, const GLuint *texName,

-                          GLboolean *residences)

-{

-   GET_CURRENT_CONTEXT(ctx);

-   GLboolean allResident = GL_TRUE;

-   GLint i, j;

-   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);

-

-   if (n < 0) {

-      _mesa_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident(n)");

-      return GL_FALSE;

-   }

-

-   if (!texName || !residences)

-      return GL_FALSE;

-

-   for (i = 0; i < n; i++) {

-      struct gl_texture_object *t;

-      if (texName[i] == 0) {

-         _mesa_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident");

-         return GL_FALSE;

-      }

-      t = _mesa_lookup_texture(ctx, texName[i]);

-      if (!t) {

-         _mesa_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident");

-         return GL_FALSE;

-      }

-      if (!ctx->Driver.IsTextureResident ||

-          ctx->Driver.IsTextureResident(ctx, t)) {

-         /* The texture is resident */

-         if (!allResident)

-            residences[i] = GL_TRUE;

-      }

-      else {

-         /* The texture is not resident */

-         if (allResident) {

-            allResident = GL_FALSE;

-            for (j = 0; j < i; j++)

-               residences[j] = GL_TRUE;

-         }

-         residences[i] = GL_FALSE;

-      }

-   }

-   

-   return allResident;

-}

-

-

-/**

- * See if a name corresponds to a texture.

- *

- * \param texture texture name.

- *

- * \return GL_TRUE if texture name corresponds to a texture, or GL_FALSE

- * otherwise.

- * 

- * \sa glIsTexture().

- *

- * Calls _mesa_HashLookup().

- */

-GLboolean GLAPIENTRY

-_mesa_IsTexture( GLuint texture )

-{

-   struct gl_texture_object *t;

-   GET_CURRENT_CONTEXT(ctx);

-   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);

-

-   if (!texture)

-      return GL_FALSE;

-

-   t = _mesa_lookup_texture(ctx, texture);

-

-   /* IsTexture is true only after object has been bound once. */

-   return t && t->Target;

-}

-

-

-/**

- * Simplest implementation of texture locking: grab the shared tex

- * mutex.  Examine the shared context state timestamp and if there has

- * been a change, set the appropriate bits in ctx->NewState.

- *

- * This is used to deal with synchronizing things when a texture object

- * is used/modified by different contexts (or threads) which are sharing

- * the texture.

- *

- * See also _mesa_lock/unlock_texture() in teximage.h

- */

-void

-_mesa_lock_context_textures( struct gl_context *ctx )

-{

-   _glthread_LOCK_MUTEX(ctx->Shared->TexMutex);

-

-   if (ctx->Shared->TextureStateStamp != ctx->TextureStateTimestamp) {

-      ctx->NewState |= _NEW_TEXTURE;

-      ctx->TextureStateTimestamp = ctx->Shared->TextureStateStamp;

-   }

-}

-

-

-void

-_mesa_unlock_context_textures( struct gl_context *ctx )

-{

-   assert(ctx->Shared->TextureStateStamp == ctx->TextureStateTimestamp);

-   _glthread_UNLOCK_MUTEX(ctx->Shared->TexMutex);

-}

-

-/*@}*/

+/**
+ * \file texobj.c
+ * Texture object management.
+ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "mfeatures.h"
+#include "bufferobj.h"
+#include "colortab.h"
+#include "context.h"
+#include "enums.h"
+#include "fbobject.h"
+#include "formats.h"
+#include "hash.h"
+#include "imports.h"
+#include "macros.h"
+#include "teximage.h"
+#include "texobj.h"
+#include "texstate.h"
+#include "mtypes.h"
+#include "program/prog_instruction.h"
+
+
+
+/**********************************************************************/
+/** \name Internal functions */
+/*@{*/
+
+
+/**
+ * Return the gl_texture_object for a given ID.
+ */
+struct gl_texture_object *
+_mesa_lookup_texture(struct gl_context *ctx, GLuint id)
+{
+   return (struct gl_texture_object *)
+      _mesa_HashLookup(ctx->Shared->TexObjects, id);
+}
+
+
+
+/**
+ * Allocate and initialize a new texture object.  But don't put it into the
+ * texture object hash table.
+ *
+ * Called via ctx->Driver.NewTextureObject, unless overridden by a device
+ * driver.
+ * 
+ * \param shared the shared GL state structure to contain the texture object
+ * \param name integer name for the texture object
+ * \param target either GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D,
+ * GL_TEXTURE_CUBE_MAP_ARB or GL_TEXTURE_RECTANGLE_NV.  zero is ok for the sake
+ * of GenTextures()
+ *
+ * \return pointer to new texture object.
+ */
+struct gl_texture_object *
+_mesa_new_texture_object( struct gl_context *ctx, GLuint name, GLenum target )
+{
+   struct gl_texture_object *obj;
+   (void) ctx;
+   obj = MALLOC_STRUCT(gl_texture_object);
+   _mesa_initialize_texture_object(obj, name, target);
+   return obj;
+}
+
+
+/**
+ * Initialize a new texture object to default values.
+ * \param obj  the texture object
+ * \param name  the texture name
+ * \param target  the texture target
+ */
+void
+_mesa_initialize_texture_object( struct gl_texture_object *obj,
+                                 GLuint name, GLenum target )
+{
+   ASSERT(target == 0 ||
+          target == GL_TEXTURE_1D ||
+          target == GL_TEXTURE_2D ||
+          target == GL_TEXTURE_3D ||
+          target == GL_TEXTURE_CUBE_MAP_ARB ||
+          target == GL_TEXTURE_RECTANGLE_NV ||
+          target == GL_TEXTURE_1D_ARRAY_EXT ||
+          target == GL_TEXTURE_2D_ARRAY_EXT ||
+          target == GL_TEXTURE_BUFFER);
+
+   memset(obj, 0, sizeof(*obj));
+   /* init the non-zero fields */
+   _glthread_INIT_MUTEX(obj->Mutex);
+   obj->RefCount = 1;
+   obj->Name = name;
+   obj->Target = target;
+   obj->Priority = 1.0F;
+   obj->BaseLevel = 0;
+   obj->MaxLevel = 1000;
+
+   /* sampler state */
+   if (target == GL_TEXTURE_RECTANGLE_NV) {
+      obj->Sampler.WrapS = GL_CLAMP_TO_EDGE;
+      obj->Sampler.WrapT = GL_CLAMP_TO_EDGE;
+      obj->Sampler.WrapR = GL_CLAMP_TO_EDGE;
+      obj->Sampler.MinFilter = GL_LINEAR;
+   }
+   else {
+      obj->Sampler.WrapS = GL_REPEAT;
+      obj->Sampler.WrapT = GL_REPEAT;
+      obj->Sampler.WrapR = GL_REPEAT;
+      obj->Sampler.MinFilter = GL_NEAREST_MIPMAP_LINEAR;
+   }
+   obj->Sampler.MagFilter = GL_LINEAR;
+   obj->Sampler.MinLod = -1000.0;
+   obj->Sampler.MaxLod = 1000.0;
+   obj->Sampler.LodBias = 0.0;
+   obj->Sampler.MaxAnisotropy = 1.0;
+   obj->Sampler.CompareMode = GL_NONE;         /* ARB_shadow */
+   obj->Sampler.CompareFunc = GL_LEQUAL;       /* ARB_shadow */
+   obj->Sampler.CompareFailValue = 0.0F;       /* ARB_shadow_ambient */
+   obj->Sampler.DepthMode = GL_LUMINANCE;      /* ARB_depth_texture */
+   obj->Swizzle[0] = GL_RED;
+   obj->Swizzle[1] = GL_GREEN;
+   obj->Swizzle[2] = GL_BLUE;
+   obj->Swizzle[3] = GL_ALPHA;
+   obj->_Swizzle = SWIZZLE_NOOP;
+   obj->Sampler.sRGBDecode = GL_DECODE_EXT;
+}
+
+
+/**
+ * Some texture initialization can't be finished until we know which
+ * target it's getting bound to (GL_TEXTURE_1D/2D/etc).
+ */
+static void
+finish_texture_init(struct gl_context *ctx, GLenum target,
+                    struct gl_texture_object *obj)
+{
+   assert(obj->Target == 0);
+
+   if (target == GL_TEXTURE_RECTANGLE_NV) {
+      /* have to init wrap and filter state here - kind of klunky */
+      obj->Sampler.WrapS = GL_CLAMP_TO_EDGE;
+      obj->Sampler.WrapT = GL_CLAMP_TO_EDGE;
+      obj->Sampler.WrapR = GL_CLAMP_TO_EDGE;
+      obj->Sampler.MinFilter = GL_LINEAR;
+      if (ctx->Driver.TexParameter) {
+         static const GLfloat fparam_wrap[1] = {(GLfloat) GL_CLAMP_TO_EDGE};
+         static const GLfloat fparam_filter[1] = {(GLfloat) GL_LINEAR};
+         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_WRAP_S, fparam_wrap);
+         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_WRAP_T, fparam_wrap);
+         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_WRAP_R, fparam_wrap);
+         ctx->Driver.TexParameter(ctx, target, obj, GL_TEXTURE_MIN_FILTER, fparam_filter);
+      }
+   }
+}
+
+
+/**
+ * Deallocate a texture object struct.  It should have already been
+ * removed from the texture object pool.
+ * Called via ctx->Driver.DeleteTexture() if not overriden by a driver.
+ *
+ * \param shared the shared GL state to which the object belongs.
+ * \param texObj the texture object to delete.
+ */
+void
+_mesa_delete_texture_object(struct gl_context *ctx,
+                            struct gl_texture_object *texObj)
+{
+   GLuint i, face;
+
+   /* Set Target to an invalid value.  With some assertions elsewhere
+    * we can try to detect possible use of deleted textures.
+    */
+   texObj->Target = 0x99;
+
+   _mesa_free_colortable_data(&texObj->Palette);
+
+   /* free the texture images */
+   for (face = 0; face < 6; face++) {
+      for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
+         if (texObj->Image[face][i]) {
+            _mesa_delete_texture_image( ctx, texObj->Image[face][i] );
+         }
+      }
+   }
+
+   _mesa_reference_buffer_object(ctx, &texObj->BufferObject, NULL);
+
+   /* destroy the mutex -- it may have allocated memory (eg on bsd) */
+   _glthread_DESTROY_MUTEX(texObj->Mutex);
+
+   /* free this object */
+   free(texObj);
+}
+
+
+
+/**
+ * Copy texture object state from one texture object to another.
+ * Use for glPush/PopAttrib.
+ *
+ * \param dest destination texture object.
+ * \param src source texture object.
+ */
+void
+_mesa_copy_texture_object( struct gl_texture_object *dest,
+                           const struct gl_texture_object *src )
+{
+   dest->Target = src->Target;
+   dest->Name = src->Name;
+   dest->Priority = src->Priority;
+   dest->Sampler.BorderColor.f[0] = src->Sampler.BorderColor.f[0];
+   dest->Sampler.BorderColor.f[1] = src->Sampler.BorderColor.f[1];
+   dest->Sampler.BorderColor.f[2] = src->Sampler.BorderColor.f[2];
+   dest->Sampler.BorderColor.f[3] = src->Sampler.BorderColor.f[3];
+   dest->Sampler.WrapS = src->Sampler.WrapS;
+   dest->Sampler.WrapT = src->Sampler.WrapT;
+   dest->Sampler.WrapR = src->Sampler.WrapR;
+   dest->Sampler.MinFilter = src->Sampler.MinFilter;
+   dest->Sampler.MagFilter = src->Sampler.MagFilter;
+   dest->Sampler.MinLod = src->Sampler.MinLod;
+   dest->Sampler.MaxLod = src->Sampler.MaxLod;
+   dest->Sampler.LodBias = src->Sampler.LodBias;
+   dest->BaseLevel = src->BaseLevel;
+   dest->MaxLevel = src->MaxLevel;
+   dest->Sampler.MaxAnisotropy = src->Sampler.MaxAnisotropy;
+   dest->Sampler.CompareMode = src->Sampler.CompareMode;
+   dest->Sampler.CompareFunc = src->Sampler.CompareFunc;
+   dest->Sampler.CompareFailValue = src->Sampler.CompareFailValue;
+   dest->Sampler.DepthMode = src->Sampler.DepthMode;
+   dest->_MaxLevel = src->_MaxLevel;
+   dest->_MaxLambda = src->_MaxLambda;
+   dest->GenerateMipmap = src->GenerateMipmap;
+   dest->Palette = src->Palette;
+   dest->_Complete = src->_Complete;
+   COPY_4V(dest->Swizzle, src->Swizzle);
+   dest->_Swizzle = src->_Swizzle;
+}
+
+
+/**
+ * Free all texture images of the given texture object.
+ *
+ * \param ctx GL context.
+ * \param t texture object.
+ *
+ * \sa _mesa_clear_texture_image().
+ */
+void
+_mesa_clear_texture_object(struct gl_context *ctx,
+                           struct gl_texture_object *texObj)
+{
+   GLuint i, j;
+
+   if (texObj->Target == 0)
+      return;
+
+   for (i = 0; i < MAX_FACES; i++) {
+      for (j = 0; j < MAX_TEXTURE_LEVELS; j++) {
+         struct gl_texture_image *texImage = texObj->Image[i][j];
+         if (texImage)
+            _mesa_clear_texture_image(ctx, texImage);
+      }
+   }
+}
+
+
+/**
+ * Check if the given texture object is valid by examining its Target field.
+ * For debugging only.
+ */
+static GLboolean
+valid_texture_object(const struct gl_texture_object *tex)
+{
+   switch (tex->Target) {
+   case 0:
+   case GL_TEXTURE_1D:
+   case GL_TEXTURE_2D:
+   case GL_TEXTURE_3D:
+   case GL_TEXTURE_CUBE_MAP_ARB:
+   case GL_TEXTURE_RECTANGLE_NV:
+   case GL_TEXTURE_1D_ARRAY_EXT:
+   case GL_TEXTURE_2D_ARRAY_EXT:
+   case GL_TEXTURE_BUFFER:
+      return GL_TRUE;
+   case 0x99:
+      _mesa_problem(NULL, "invalid reference to a deleted texture object");
+      return GL_FALSE;
+   default:
+      _mesa_problem(NULL, "invalid texture object Target 0x%x, Id = %u",
+                    tex->Target, tex->Name);
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Reference (or unreference) a texture object.
+ * If '*ptr', decrement *ptr's refcount (and delete if it becomes zero).
+ * If 'tex' is non-null, increment its refcount.
+ */
+void
+_mesa_reference_texobj(struct gl_texture_object **ptr,
+                       struct gl_texture_object *tex)
+{
+   assert(ptr);
+   if (*ptr == tex) {
+      /* no change */
+      return;
+   }
+
+   if (*ptr) {
+      /* Unreference the old texture */
+      GLboolean deleteFlag = GL_FALSE;
+      struct gl_texture_object *oldTex = *ptr;
+
+      ASSERT(valid_texture_object(oldTex));
+      (void) valid_texture_object; /* silence warning in release builds */
+
+      _glthread_LOCK_MUTEX(oldTex->Mutex);
+      ASSERT(oldTex->RefCount > 0);
+      oldTex->RefCount--;
+
+      deleteFlag = (oldTex->RefCount == 0);
+      _glthread_UNLOCK_MUTEX(oldTex->Mutex);
+
+      if (deleteFlag) {
+         GET_CURRENT_CONTEXT(ctx);
+         if (ctx)
+            ctx->Driver.DeleteTexture(ctx, oldTex);
+         else
+            _mesa_problem(NULL, "Unable to delete texture, no context");
+      }
+
+      *ptr = NULL;
+   }
+   assert(!*ptr);
+
+   if (tex) {
+      /* reference new texture */
+      ASSERT(valid_texture_object(tex));
+      _glthread_LOCK_MUTEX(tex->Mutex);
+      if (tex->RefCount == 0) {
+         /* this texture's being deleted (look just above) */
+         /* Not sure this can every really happen.  Warn if it does. */
+         _mesa_problem(NULL, "referencing deleted texture object");
+         *ptr = NULL;
+      }
+      else {
+         tex->RefCount++;
+         *ptr = tex;
+      }
+      _glthread_UNLOCK_MUTEX(tex->Mutex);
+   }
+}
+
+
+
+/**
+ * Mark a texture object as incomplete.
+ * \param t  texture object
+ * \param fmt...  string describing why it's incomplete (for debugging).
+ */
+static void
+incomplete(struct gl_texture_object *t, const char *fmt, ...)
+{
+#if 0
+   va_list args;
+   char s[100];
+
+   va_start(args, fmt);
+   vsnprintf(s, sizeof(s), fmt, args);
+   va_end(args);
+
+   printf("Texture Obj %d incomplete because: %s\n", t->Name, s);
+#endif
+   t->_Complete = GL_FALSE;
+}
+
+
+/**
+ * Examine a texture object to determine if it is complete.
+ *
+ * The gl_texture_object::Complete flag will be set to GL_TRUE or GL_FALSE
+ * accordingly.
+ *
+ * \param ctx GL context.
+ * \param t texture object.
+ *
+ * According to the texture target, verifies that each of the mipmaps is
+ * present and has the expected size.
+ */
+void
+_mesa_test_texobj_completeness( const struct gl_context *ctx,
+                                struct gl_texture_object *t )
+{
+   const GLint baseLevel = t->BaseLevel;
+   GLint maxLog2 = 0, maxLevels = 0;
+
+   t->_Complete = GL_TRUE;  /* be optimistic */
+
+   /* Detect cases where the application set the base level to an invalid
+    * value.
+    */
+   if ((baseLevel < 0) || (baseLevel >= MAX_TEXTURE_LEVELS)) {
+      incomplete(t, "base level = %d is invalid", baseLevel);
+      return;
+   }
+
+   /* Always need the base level image */
+   if (!t->Image[0][baseLevel]) {
+      incomplete(t, "Image[baseLevel=%d] == NULL", baseLevel);
+      return;
+   }
+
+   /* Check width/height/depth for zero */
+   if (t->Image[0][baseLevel]->Width == 0 ||
+       t->Image[0][baseLevel]->Height == 0 ||
+       t->Image[0][baseLevel]->Depth == 0) {
+      incomplete(t, "texture width = 0");
+      return;
+   }
+
+   /* Compute _MaxLevel */
+   if ((t->Target == GL_TEXTURE_1D) ||
+       (t->Target == GL_TEXTURE_1D_ARRAY_EXT)) {
+      maxLog2 = t->Image[0][baseLevel]->WidthLog2;
+      maxLevels = ctx->Const.MaxTextureLevels;
+   }
+   else if ((t->Target == GL_TEXTURE_2D) ||
+            (t->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
+      maxLog2 = MAX2(t->Image[0][baseLevel]->WidthLog2,
+                     t->Image[0][baseLevel]->HeightLog2);
+      maxLevels = ctx->Const.MaxTextureLevels;
+   }
+   else if (t->Target == GL_TEXTURE_3D) {
+      GLint max = MAX2(t->Image[0][baseLevel]->WidthLog2,
+                       t->Image[0][baseLevel]->HeightLog2);
+      maxLog2 = MAX2(max, (GLint)(t->Image[0][baseLevel]->DepthLog2));
+      maxLevels = ctx->Const.Max3DTextureLevels;
+   }
+   else if (t->Target == GL_TEXTURE_CUBE_MAP_ARB) {
+      maxLog2 = MAX2(t->Image[0][baseLevel]->WidthLog2,
+                     t->Image[0][baseLevel]->HeightLog2);
+      maxLevels = ctx->Const.MaxCubeTextureLevels;
+   }
+   else if (t->Target == GL_TEXTURE_RECTANGLE_NV) {
+      maxLog2 = 0;  /* not applicable */
+      maxLevels = 1;  /* no mipmapping */
+   }
+   else {
+      _mesa_problem(ctx, "Bad t->Target in _mesa_test_texobj_completeness");
+      return;
+   }
+
+   ASSERT(maxLevels > 0);
+
+   if (t->MaxLevel < t->BaseLevel) {
+      incomplete(t, "MAX_LEVEL (%d) < BASE_LEVEL (%d)",
+		 t->MaxLevel, t->BaseLevel);
+      return;
+   }
+
+   t->_MaxLevel = baseLevel + maxLog2;
+   t->_MaxLevel = MIN2(t->_MaxLevel, t->MaxLevel);
+   t->_MaxLevel = MIN2(t->_MaxLevel, maxLevels - 1);
+
+   /* Compute _MaxLambda = q - b (see the 1.2 spec) used during mipmapping */
+   t->_MaxLambda = (GLfloat) (t->_MaxLevel - t->BaseLevel);
+
+   if (t->Target == GL_TEXTURE_CUBE_MAP_ARB) {
+      /* make sure that all six cube map level 0 images are the same size */
+      const GLuint w = t->Image[0][baseLevel]->Width2;
+      const GLuint h = t->Image[0][baseLevel]->Height2;
+      GLuint face;
+      for (face = 1; face < 6; face++) {
+         if (t->Image[face][baseLevel] == NULL ||
+             t->Image[face][baseLevel]->Width2 != w ||
+             t->Image[face][baseLevel]->Height2 != h) {
+            incomplete(t, "Cube face missing or mismatched size");
+            return;
+         }
+      }
+   }
+
+   /* extra checking for mipmaps */
+   if (t->Sampler.MinFilter != GL_NEAREST && t->Sampler.MinFilter != GL_LINEAR) {
+      /*
+       * Mipmapping: determine if we have a complete set of mipmaps
+       */
+      GLint i;
+      GLint minLevel = baseLevel;
+      GLint maxLevel = t->_MaxLevel;
+
+      if (minLevel > maxLevel) {
+         incomplete(t, "minLevel > maxLevel");
+         return;
+      }
+
+      /* Test dimension-independent attributes */
+      for (i = minLevel; i <= maxLevel; i++) {
+         if (t->Image[0][i]) {
+            if (t->Image[0][i]->TexFormat != t->Image[0][baseLevel]->TexFormat) {
+               incomplete(t, "Format[i] != Format[baseLevel]");
+               return;
+            }
+            if (t->Image[0][i]->Border != t->Image[0][baseLevel]->Border) {
+               incomplete(t, "Border[i] != Border[baseLevel]");
+               return;
+            }
+         }
+      }
+
+      /* Test things which depend on number of texture image dimensions */
+      if ((t->Target == GL_TEXTURE_1D) ||
+          (t->Target == GL_TEXTURE_1D_ARRAY_EXT)) {
+         /* Test 1-D mipmaps */
+         GLuint width = t->Image[0][baseLevel]->Width2;
+         for (i = baseLevel + 1; i < maxLevels; i++) {
+            if (width > 1) {
+               width /= 2;
+            }
+            if (i >= minLevel && i <= maxLevel) {
+               if (!t->Image[0][i]) {
+                  incomplete(t, "1D Image[0][i] == NULL");
+                  return;
+               }
+               if (t->Image[0][i]->Width2 != width ) {
+                  incomplete(t, "1D Image[0][i] bad width");
+                  return;
+               }
+            }
+            if (width == 1) {
+               return;  /* found smallest needed mipmap, all done! */
+            }
+         }
+      }
+      else if ((t->Target == GL_TEXTURE_2D) ||
+               (t->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
+         /* Test 2-D mipmaps */
+         GLuint width = t->Image[0][baseLevel]->Width2;
+         GLuint height = t->Image[0][baseLevel]->Height2;
+         for (i = baseLevel + 1; i < maxLevels; i++) {
+            if (width > 1) {
+               width /= 2;
+            }
+            if (height > 1) {
+               height /= 2;
+            }
+            if (i >= minLevel && i <= maxLevel) {
+               if (!t->Image[0][i]) {
+                  incomplete(t, "2D Image[0][i] == NULL");
+                  return;
+               }
+               if (t->Image[0][i]->Width2 != width) {
+                  incomplete(t, "2D Image[0][i] bad width");
+                  return;
+               }
+               if (t->Image[0][i]->Height2 != height) {
+                  incomplete(t, "2D Image[0][i] bad height");
+                  return;
+               }
+               if (width==1 && height==1) {
+                  return;  /* found smallest needed mipmap, all done! */
+               }
+            }
+         }
+      }
+      else if (t->Target == GL_TEXTURE_3D) {
+         /* Test 3-D mipmaps */
+         GLuint width = t->Image[0][baseLevel]->Width2;
+         GLuint height = t->Image[0][baseLevel]->Height2;
+         GLuint depth = t->Image[0][baseLevel]->Depth2;
+         for (i = baseLevel + 1; i < maxLevels; i++) {
+            if (width > 1) {
+               width /= 2;
+            }
+            if (height > 1) {
+               height /= 2;
+            }
+            if (depth > 1) {
+               depth /= 2;
+            }
+            if (i >= minLevel && i <= maxLevel) {
+               if (!t->Image[0][i]) {
+                  incomplete(t, "3D Image[0][i] == NULL");
+                  return;
+               }
+               if (t->Image[0][i]->_BaseFormat == GL_DEPTH_COMPONENT) {
+                  incomplete(t, "GL_DEPTH_COMPONENT only works with 1/2D tex");
+                  return;
+               }
+               if (t->Image[0][i]->Width2 != width) {
+                  incomplete(t, "3D Image[0][i] bad width");
+                  return;
+               }
+               if (t->Image[0][i]->Height2 != height) {
+                  incomplete(t, "3D Image[0][i] bad height");
+                  return;
+               }
+               if (t->Image[0][i]->Depth2 != depth) {
+                  incomplete(t, "3D Image[0][i] bad depth");
+                  return;
+               }
+            }
+            if (width == 1 && height == 1 && depth == 1) {
+               return;  /* found smallest needed mipmap, all done! */
+            }
+         }
+      }
+      else if (t->Target == GL_TEXTURE_CUBE_MAP_ARB) {
+         /* make sure 6 cube faces are consistant */
+         GLuint width = t->Image[0][baseLevel]->Width2;
+         GLuint height = t->Image[0][baseLevel]->Height2;
+         for (i = baseLevel + 1; i < maxLevels; i++) {
+            if (width > 1) {
+               width /= 2;
+            }
+            if (height > 1) {
+               height /= 2;
+            }
+            if (i >= minLevel && i <= maxLevel) {
+	       GLuint face;
+	       for (face = 0; face < 6; face++) {
+		  /* check that we have images defined */
+		  if (!t->Image[face][i]) {
+		     incomplete(t, "CubeMap Image[n][i] == NULL");
+		     return;
+		  }
+		  /* Don't support GL_DEPTH_COMPONENT for cube maps */
+		  if (t->Image[face][i]->_BaseFormat == GL_DEPTH_COMPONENT) {
+		     incomplete(t, "GL_DEPTH_COMPONENT only works with 1/2D tex");
+		     return;
+		  }
+		  /* check that all six images have same size */
+                  if (t->Image[face][i]->Width2 != width || 
+                      t->Image[face][i]->Height2 != height) {
+		     incomplete(t, "CubeMap Image[n][i] bad size");
+		     return;
+		  }
+	       }
+	    }
+	    if (width == 1 && height == 1) {
+	       return;  /* found smallest needed mipmap, all done! */
+            }
+         }
+      }
+      else if (t->Target == GL_TEXTURE_RECTANGLE_NV) {
+         /* XXX special checking? */
+      }
+      else {
+         /* Target = ??? */
+         _mesa_problem(ctx, "Bug in gl_test_texture_object_completeness\n");
+      }
+   }
+}
+
+
+/**
+ * Check if the given cube map texture is "cube complete" as defined in
+ * the OpenGL specification.
+ */
+GLboolean
+_mesa_cube_complete(const struct gl_texture_object *texObj)
+{
+   const GLint baseLevel = texObj->BaseLevel;
+   const struct gl_texture_image *img0, *img;
+   GLuint face;
+
+   if (texObj->Target != GL_TEXTURE_CUBE_MAP)
+      return GL_FALSE;
+
+   if ((baseLevel < 0) || (baseLevel >= MAX_TEXTURE_LEVELS))
+      return GL_FALSE;
+
+   /* check first face */
+   img0 = texObj->Image[0][baseLevel];
+   if (!img0 ||
+       img0->Width < 1 ||
+       img0->Width != img0->Height)
+      return GL_FALSE;
+
+   /* check remaining faces vs. first face */
+   for (face = 1; face < 6; face++) {
+      img = texObj->Image[face][baseLevel];
+      if (!img ||
+          img->Width != img0->Width ||
+          img->Height != img0->Height ||
+          img->TexFormat != img0->TexFormat)
+         return GL_FALSE;
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Mark a texture object dirty.  It forces the object to be incomplete
+ * and optionally forces the context to re-validate its state.
+ *
+ * \param ctx GL context.
+ * \param texObj texture object.
+ * \param invalidate_state also invalidate context state.
+ */
+void
+_mesa_dirty_texobj(struct gl_context *ctx, struct gl_texture_object *texObj,
+                   GLboolean invalidate_state)
+{
+   texObj->_Complete = GL_FALSE;
+   if (invalidate_state)
+      ctx->NewState |= _NEW_TEXTURE;
+}
+
+
+/**
+ * Return pointer to a default/fallback texture.
+ * The texture is a 2D 8x8 RGBA texture with all texels = (0,0,0,1).
+ * That's the value a sampler should get when sampling from an
+ * incomplete texture.
+ */
+struct gl_texture_object *
+_mesa_get_fallback_texture(struct gl_context *ctx)
+{
+   if (!ctx->Shared->FallbackTex) {
+      /* create fallback texture now */
+      static GLubyte texels[8 * 8][4];
+      struct gl_texture_object *texObj;
+      struct gl_texture_image *texImage;
+      gl_format texFormat;
+      GLuint i;
+
+      for (i = 0; i < 8 * 8; i++) {
+         texels[i][0] =
+         texels[i][1] =
+         texels[i][2] = 0x0;
+         texels[i][3] = 0xff;
+      }
+
+      /* create texture object */
+      texObj = ctx->Driver.NewTextureObject(ctx, 0, GL_TEXTURE_2D);
+      assert(texObj->RefCount == 1);
+      texObj->Sampler.MinFilter = GL_NEAREST;
+      texObj->Sampler.MagFilter = GL_NEAREST;
+
+      /* create level[0] texture image */
+      texImage = _mesa_get_tex_image(ctx, texObj, GL_TEXTURE_2D, 0);
+
+      texFormat = ctx->Driver.ChooseTextureFormat(ctx, GL_RGBA, GL_RGBA,
+                                                  GL_UNSIGNED_BYTE);
+
+      /* init the image fields */
+      _mesa_init_teximage_fields(ctx, GL_TEXTURE_2D, texImage,
+                                 8, 8, 1, 0, GL_RGBA, texFormat); 
+
+      ASSERT(texImage->TexFormat != MESA_FORMAT_NONE);
+
+      /* set image data */
+      ctx->Driver.TexImage2D(ctx, GL_TEXTURE_2D, 0, GL_RGBA,
+                             8, 8, 0,
+                             GL_RGBA, GL_UNSIGNED_BYTE, texels,
+                             &ctx->DefaultPacking, texObj, texImage);
+
+      _mesa_test_texobj_completeness(ctx, texObj);
+      assert(texObj->_Complete);
+
+      ctx->Shared->FallbackTex = texObj;
+   }
+   return ctx->Shared->FallbackTex;
+}
+
+
+/*@}*/
+
+
+/***********************************************************************/
+/** \name API functions */
+/*@{*/
+
+
+/**
+ * Generate texture names.
+ *
+ * \param n number of texture names to be generated.
+ * \param textures an array in which will hold the generated texture names.
+ *
+ * \sa glGenTextures().
+ *
+ * Calls _mesa_HashFindFreeKeyBlock() to find a block of free texture
+ * IDs which are stored in \p textures.  Corresponding empty texture
+ * objects are also generated.
+ */ 
+void GLAPIENTRY
+_mesa_GenTextures( GLsizei n, GLuint *textures )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint first;
+   GLint i;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (n < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glGenTextures" );
+      return;
+   }
+
+   if (!textures)
+      return;
+
+   /*
+    * This must be atomic (generation and allocation of texture IDs)
+    */
+   _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
+
+   first = _mesa_HashFindFreeKeyBlock(ctx->Shared->TexObjects, n);
+
+   /* Allocate new, empty texture objects */
+   for (i = 0; i < n; i++) {
+      struct gl_texture_object *texObj;
+      GLuint name = first + i;
+      GLenum target = 0;
+      texObj = (*ctx->Driver.NewTextureObject)( ctx, name, target);
+      if (!texObj) {
+         _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTextures");
+         return;
+      }
+
+      /* insert into hash table */
+      _mesa_HashInsert(ctx->Shared->TexObjects, texObj->Name, texObj);
+
+      textures[i] = name;
+   }
+
+   _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+}
+
+
+/**
+ * Check if the given texture object is bound to the current draw or
+ * read framebuffer.  If so, Unbind it.
+ */
+static void
+unbind_texobj_from_fbo(struct gl_context *ctx,
+                       struct gl_texture_object *texObj)
+{
+   const GLuint n = (ctx->DrawBuffer == ctx->ReadBuffer) ? 1 : 2;
+   GLuint i;
+
+   for (i = 0; i < n; i++) {
+      struct gl_framebuffer *fb = (i == 0) ? ctx->DrawBuffer : ctx->ReadBuffer;
+      if (fb->Name) {
+         GLuint j;
+         for (j = 0; j < BUFFER_COUNT; j++) {
+            if (fb->Attachment[j].Type == GL_TEXTURE &&
+                fb->Attachment[j].Texture == texObj) {
+               _mesa_remove_attachment(ctx, fb->Attachment + j);         
+            }
+         }
+      }
+   }
+}
+
+
+/**
+ * Check if the given texture object is bound to any texture image units and
+ * unbind it if so (revert to default textures).
+ */
+static void
+unbind_texobj_from_texunits(struct gl_context *ctx,
+                            struct gl_texture_object *texObj)
+{
+   GLuint u, tex;
+
+   for (u = 0; u < MAX_TEXTURE_IMAGE_UNITS; u++) {
+      struct gl_texture_unit *unit = &ctx->Texture.Unit[u];
+      for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
+         if (texObj == unit->CurrentTex[tex]) {
+            _mesa_reference_texobj(&unit->CurrentTex[tex],
+                                   ctx->Shared->DefaultTex[tex]);
+            ASSERT(unit->CurrentTex[tex]);
+            break;
+         }
+      }
+   }
+}
+
+
+/**
+ * Delete named textures.
+ *
+ * \param n number of textures to be deleted.
+ * \param textures array of texture IDs to be deleted.
+ *
+ * \sa glDeleteTextures().
+ *
+ * If we're about to delete a texture that's currently bound to any
+ * texture unit, unbind the texture first.  Decrement the reference
+ * count on the texture object and delete it if it's zero.
+ * Recall that texture objects can be shared among several rendering
+ * contexts.
+ */
+void GLAPIENTRY
+_mesa_DeleteTextures( GLsizei n, const GLuint *textures)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint i;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
+
+   if (!textures)
+      return;
+
+   for (i = 0; i < n; i++) {
+      if (textures[i] > 0) {
+         struct gl_texture_object *delObj
+            = _mesa_lookup_texture(ctx, textures[i]);
+
+         if (delObj) {
+            _mesa_lock_texture(ctx, delObj);
+
+            /* Check if texture is bound to any framebuffer objects.
+             * If so, unbind.
+             * See section 4.4.2.3 of GL_EXT_framebuffer_object.
+             */
+            unbind_texobj_from_fbo(ctx, delObj);
+
+            /* Check if this texture is currently bound to any texture units.
+             * If so, unbind it.
+             */
+            unbind_texobj_from_texunits(ctx, delObj);
+
+            _mesa_unlock_texture(ctx, delObj);
+
+            ctx->NewState |= _NEW_TEXTURE;
+
+            /* The texture _name_ is now free for re-use.
+             * Remove it from the hash table now.
+             */
+            _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
+            _mesa_HashRemove(ctx->Shared->TexObjects, delObj->Name);
+            _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+
+            /* Unreference the texobj.  If refcount hits zero, the texture
+             * will be deleted.
+             */
+            _mesa_reference_texobj(&delObj, NULL);
+         }
+      }
+   }
+}
+
+
+/**
+ * Convert a GL texture target enum such as GL_TEXTURE_2D or GL_TEXTURE_3D
+ * into the corresponding Mesa texture target index.
+ * Note that proxy targets are not valid here.
+ * \return TEXTURE_x_INDEX or -1 if target is invalid
+ */
+static GLint
+target_enum_to_index(GLenum target)
+{
+   switch (target) {
+   case GL_TEXTURE_1D:
+      return TEXTURE_1D_INDEX;
+   case GL_TEXTURE_2D:
+      return TEXTURE_2D_INDEX;
+   case GL_TEXTURE_3D:
+      return TEXTURE_3D_INDEX;
+   case GL_TEXTURE_CUBE_MAP_ARB:
+      return TEXTURE_CUBE_INDEX;
+   case GL_TEXTURE_RECTANGLE_NV:
+      return TEXTURE_RECT_INDEX;
+   case GL_TEXTURE_1D_ARRAY_EXT:
+      return TEXTURE_1D_ARRAY_INDEX;
+   case GL_TEXTURE_2D_ARRAY_EXT:
+      return TEXTURE_2D_ARRAY_INDEX;
+   case GL_TEXTURE_BUFFER_ARB:
+      return TEXTURE_BUFFER_INDEX;
+   default:
+      return -1;
+   }
+}
+
+
+/**
+ * Bind a named texture to a texturing target.
+ * 
+ * \param target texture target.
+ * \param texName texture name.
+ * 
+ * \sa glBindTexture().
+ *
+ * Determines the old texture object bound and returns immediately if rebinding
+ * the same texture.  Get the current texture which is either a default texture
+ * if name is null, a named texture from the hash, or a new texture if the
+ * given texture name is new. Increments its reference count, binds it, and
+ * calls dd_function_table::BindTexture. Decrements the old texture reference
+ * count and deletes it if it reaches zero.
+ */
+void GLAPIENTRY
+_mesa_BindTexture( GLenum target, GLuint texName )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
+   struct gl_texture_object *newTexObj = NULL;
+   GLint targetIndex;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
+      _mesa_debug(ctx, "glBindTexture %s %d\n",
+                  _mesa_lookup_enum_by_nr(target), (GLint) texName);
+
+   targetIndex = target_enum_to_index(target);
+   if (targetIndex < 0) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindTexture(target)");
+      return;
+   }
+   assert(targetIndex < NUM_TEXTURE_TARGETS);
+
+   /*
+    * Get pointer to new texture object (newTexObj)
+    */
+   if (texName == 0) {
+      /* Use a default texture object */
+      newTexObj = ctx->Shared->DefaultTex[targetIndex];
+   }
+   else {
+      /* non-default texture object */
+      newTexObj = _mesa_lookup_texture(ctx, texName);
+      if (newTexObj) {
+         /* error checking */
+         if (newTexObj->Target != 0 && newTexObj->Target != target) {
+            /* the named texture object's target doesn't match the given target */
+            _mesa_error( ctx, GL_INVALID_OPERATION,
+                         "glBindTexture(target mismatch)" );
+            return;
+         }
+         if (newTexObj->Target == 0) {
+            finish_texture_init(ctx, target, newTexObj);
+         }
+      }
+      else {
+         /* if this is a new texture id, allocate a texture object now */
+         newTexObj = (*ctx->Driver.NewTextureObject)(ctx, texName, target);
+         if (!newTexObj) {
+            _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindTexture");
+            return;
+         }
+
+         /* and insert it into hash table */
+         _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
+         _mesa_HashInsert(ctx->Shared->TexObjects, texName, newTexObj);
+         _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+      }
+      newTexObj->Target = target;
+   }
+
+   assert(valid_texture_object(newTexObj));
+
+   /* Check if this texture is only used by this context and is already bound.
+    * If so, just return.
+    */
+   {
+      GLboolean early_out;
+      _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
+      early_out = ((ctx->Shared->RefCount == 1)
+                   && (newTexObj == texUnit->CurrentTex[targetIndex]));
+      _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+      if (early_out) {
+         return;
+      }
+   }
+
+   /* flush before changing binding */
+   FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+
+   /* Do the actual binding.  The refcount on the previously bound
+    * texture object will be decremented.  It'll be deleted if the
+    * count hits zero.
+    */
+   _mesa_reference_texobj(&texUnit->CurrentTex[targetIndex], newTexObj);
+   ASSERT(texUnit->CurrentTex[targetIndex]);
+
+   /* Pass BindTexture call to device driver */
+   if (ctx->Driver.BindTexture)
+      (*ctx->Driver.BindTexture)( ctx, target, newTexObj );
+}
+
+
+/**
+ * Set texture priorities.
+ * 
+ * \param n number of textures.
+ * \param texName texture names.
+ * \param priorities corresponding texture priorities.
+ * 
+ * \sa glPrioritizeTextures().
+ * 
+ * Looks up each texture in the hash, clamps the corresponding priority between
+ * 0.0 and 1.0, and calls dd_function_table::PrioritizeTexture.
+ */
+void GLAPIENTRY
+_mesa_PrioritizeTextures( GLsizei n, const GLuint *texName,
+                          const GLclampf *priorities )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint i;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (n < 0) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glPrioritizeTextures" );
+      return;
+   }
+
+   if (!priorities)
+      return;
+
+   for (i = 0; i < n; i++) {
+      if (texName[i] > 0) {
+         struct gl_texture_object *t = _mesa_lookup_texture(ctx, texName[i]);
+         if (t) {
+            t->Priority = CLAMP( priorities[i], 0.0F, 1.0F );
+         }
+      }
+   }
+
+   ctx->NewState |= _NEW_TEXTURE;
+}
+
+
+
+/**
+ * See if textures are loaded in texture memory.
+ * 
+ * \param n number of textures to query.
+ * \param texName array with the texture names.
+ * \param residences array which will hold the residence status.
+ *
+ * \return GL_TRUE if all textures are resident and \p residences is left unchanged, 
+ * 
+ * \sa glAreTexturesResident().
+ *
+ * Looks up each texture in the hash and calls
+ * dd_function_table::IsTextureResident.
+ */
+GLboolean GLAPIENTRY
+_mesa_AreTexturesResident(GLsizei n, const GLuint *texName,
+                          GLboolean *residences)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLboolean allResident = GL_TRUE;
+   GLint i, j;
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+   if (n < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident(n)");
+      return GL_FALSE;
+   }
+
+   if (!texName || !residences)
+      return GL_FALSE;
+
+   for (i = 0; i < n; i++) {
+      struct gl_texture_object *t;
+      if (texName[i] == 0) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident");
+         return GL_FALSE;
+      }
+      t = _mesa_lookup_texture(ctx, texName[i]);
+      if (!t) {
+         _mesa_error(ctx, GL_INVALID_VALUE, "glAreTexturesResident");
+         return GL_FALSE;
+      }
+      if (!ctx->Driver.IsTextureResident ||
+          ctx->Driver.IsTextureResident(ctx, t)) {
+         /* The texture is resident */
+         if (!allResident)
+            residences[i] = GL_TRUE;
+      }
+      else {
+         /* The texture is not resident */
+         if (allResident) {
+            allResident = GL_FALSE;
+            for (j = 0; j < i; j++)
+               residences[j] = GL_TRUE;
+         }
+         residences[i] = GL_FALSE;
+      }
+   }
+   
+   return allResident;
+}
+
+
+/**
+ * See if a name corresponds to a texture.
+ *
+ * \param texture texture name.
+ *
+ * \return GL_TRUE if texture name corresponds to a texture, or GL_FALSE
+ * otherwise.
+ * 
+ * \sa glIsTexture().
+ *
+ * Calls _mesa_HashLookup().
+ */
+GLboolean GLAPIENTRY
+_mesa_IsTexture( GLuint texture )
+{
+   struct gl_texture_object *t;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+   if (!texture)
+      return GL_FALSE;
+
+   t = _mesa_lookup_texture(ctx, texture);
+
+   /* IsTexture is true only after object has been bound once. */
+   return t && t->Target;
+}
+
+
+/**
+ * Simplest implementation of texture locking: grab the shared tex
+ * mutex.  Examine the shared context state timestamp and if there has
+ * been a change, set the appropriate bits in ctx->NewState.
+ *
+ * This is used to deal with synchronizing things when a texture object
+ * is used/modified by different contexts (or threads) which are sharing
+ * the texture.
+ *
+ * See also _mesa_lock/unlock_texture() in teximage.h
+ */
+void
+_mesa_lock_context_textures( struct gl_context *ctx )
+{
+   _glthread_LOCK_MUTEX(ctx->Shared->TexMutex);
+
+   if (ctx->Shared->TextureStateStamp != ctx->TextureStateTimestamp) {
+      ctx->NewState |= _NEW_TEXTURE;
+      ctx->TextureStateTimestamp = ctx->Shared->TextureStateStamp;
+   }
+}
+
+
+void
+_mesa_unlock_context_textures( struct gl_context *ctx )
+{
+   assert(ctx->Shared->TextureStateStamp == ctx->TextureStateTimestamp);
+   _glthread_UNLOCK_MUTEX(ctx->Shared->TexMutex);
+}
+
+/*@}*/