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, 1000 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/main/texobj.c b/nx-X11/extras/Mesa/src/mesa/main/texobj.c
new file mode 100644
index 000000000..5594cd938
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/main/texobj.c
@@ -0,0 +1,1000 @@
+/**
+ * \file texobj.c
+ * Texture object management.
+ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "colortab.h"
+#include "context.h"
+#include "enums.h"
+#include "hash.h"
+#include "imports.h"
+#include "macros.h"
+#include "teximage.h"
+#include "texstate.h"
+#include "texobj.h"
+#include "mtypes.h"
+
+
+/**********************************************************************/
+/** \name Internal functions */
+/*@{*/
+
+/**
+ * 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( GLcontext *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);
+
+   _mesa_bzero(obj, 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->CompareFlag = GL_FALSE;                      /* SGIX_shadow */
+   obj->CompareOperator = GL_TEXTURE_LEQUAL_R_SGIX;  /* SGIX_shadow */
+   obj->CompareMode = GL_NONE;         /* ARB_shadow */
+   obj->CompareFunc = GL_LEQUAL;       /* ARB_shadow */
+   obj->DepthMode = GL_LUMINANCE;      /* ARB_depth_texture */
+   obj->ShadowAmbient = 0.0F;          /* ARB/SGIX_shadow_ambient */
+   _mesa_init_colortable(&obj->Palette);
+}
+
+
+/**
+ * Deallocate a texture object struct.  It should have already been
+ * removed from the texture object pool.
+ *
+ * \param shared the shared GL state to which the object belongs.
+ * \param texOjb the texture object to delete.
+ */
+void
+_mesa_delete_texture_object( GLcontext *ctx, struct gl_texture_object *texObj )
+{
+   GLuint i, face;
+
+   (void) ctx;
+
+   _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] );
+	 }
+      }
+   }
+
+   /* destroy the mutex -- it may have allocated memory (eg on bsd) */
+   _glthread_DESTROY_MUTEX(texObj->Mutex);
+
+   /* free this object */
+   _mesa_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->Name = src->Name;
+   dest->Priority = src->Priority;
+   dest->BorderColor[0] = src->BorderColor[0];
+   dest->BorderColor[1] = src->BorderColor[1];
+   dest->BorderColor[2] = src->BorderColor[2];
+   dest->BorderColor[3] = src->BorderColor[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->CompareFlag = src->CompareFlag;
+   dest->CompareOperator = src->CompareOperator;
+   dest->ShadowAmbient = src->ShadowAmbient;
+   dest->CompareMode = src->CompareMode;
+   dest->CompareFunc = src->CompareFunc;
+   dest->DepthMode = src->DepthMode;
+   dest->_MaxLevel = src->_MaxLevel;
+   dest->_MaxLambda = src->_MaxLambda;
+   dest->GenerateMipmap = src->GenerateMipmap;
+   dest->Palette = src->Palette;
+   dest->Complete = src->Complete;
+   dest->_IsPowerOfTwo = src->_IsPowerOfTwo;
+}
+
+
+/**
+ * Report why a texture object is incomplete.  
+ *
+ * \param t texture object.
+ * \param why string describing why it's incomplete.
+ *
+ * \note For debug purposes only.
+ */
+#if 0
+static void
+incomplete(const struct gl_texture_object *t, const char *why)
+{
+   _mesa_printf("Texture Obj %d incomplete because: %s\n", t->Name, why);
+}
+#else
+#define incomplete(t, why)
+#endif
+
+
+/**
+ * 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 GLcontext *ctx,
+                                struct gl_texture_object *t )
+{
+   const GLint baseLevel = t->BaseLevel;
+   GLint maxLog2 = 0, maxLevels = 0;
+
+   t->Complete = GL_TRUE;  /* be optimistic */
+   t->_IsPowerOfTwo = GL_TRUE;  /* may be set FALSE below */
+
+   /* Always need the base level image */
+   if (!t->Image[0][baseLevel]) {
+      char s[100];
+      sprintf(s, "obj %p (%d) Image[baseLevel=%d] == NULL",
+              (void *) t, t->Name, baseLevel);
+      incomplete(t, s);
+      t->Complete = GL_FALSE;
+      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");
+      t->Complete = GL_FALSE;
+      return;
+   }
+
+   /* Compute _MaxLevel */
+   if (t->Target == GL_TEXTURE_1D) {
+      maxLog2 = t->Image[0][baseLevel]->WidthLog2;
+      maxLevels = ctx->Const.MaxTextureLevels;
+   }
+   else if (t->Target == GL_TEXTURE_2D) {
+      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);
+
+   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) {
+	    t->Complete = GL_FALSE;
+	    incomplete(t, "Non-quare cubemap image");
+	    return;
+	 }
+      }
+   }
+
+   /* check for non power of two */
+   if (!t->Image[0][baseLevel]->_IsPowerOfTwo) {
+      t->_IsPowerOfTwo = GL_FALSE;
+   }
+
+   /* 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) {
+         t->Complete = GL_FALSE;
+         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) {
+               t->Complete = GL_FALSE;
+               incomplete(t, "Format[i] != Format[baseLevel]");
+               return;
+            }
+            if (t->Image[0][i]->Border != t->Image[0][baseLevel]->Border) {
+               t->Complete = GL_FALSE;
+               incomplete(t, "Border[i] != Border[baseLevel]");
+               return;
+            }
+         }
+      }
+
+      /* Test things which depend on number of texture image dimensions */
+      if (t->Target == GL_TEXTURE_1D) {
+         /* 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]) {
+                  t->Complete = GL_FALSE;
+                  incomplete(t, "1D Image[0][i] == NULL");
+                  return;
+               }
+               if (t->Image[0][i]->Width2 != width ) {
+                  t->Complete = GL_FALSE;
+                  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) {
+         /* 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]) {
+                  t->Complete = GL_FALSE;
+                  incomplete(t, "2D Image[0][i] == NULL");
+                  return;
+               }
+               if (t->Image[0][i]->Width2 != width) {
+                  t->Complete = GL_FALSE;
+                  incomplete(t, "2D Image[0][i] bad width");
+                  return;
+               }
+               if (t->Image[0][i]->Height2 != height) {
+                  t->Complete = GL_FALSE;
+                  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");
+                  t->Complete = GL_FALSE;
+                  return;
+               }
+               if (t->Image[0][i]->Format == GL_DEPTH_COMPONENT) {
+                  t->Complete = GL_FALSE;
+                  incomplete(t, "GL_DEPTH_COMPONENT only works with 1/2D tex");
+                  return;
+               }
+               if (t->Image[0][i]->Width2 != width) {
+                  t->Complete = GL_FALSE;
+                  incomplete(t, "3D Image[0][i] bad width");
+                  return;
+               }
+               if (t->Image[0][i]->Height2 != height) {
+                  t->Complete = GL_FALSE;
+                  incomplete(t, "3D Image[0][i] bad height");
+                  return;
+               }
+               if (t->Image[0][i]->Depth2 != depth) {
+                  t->Complete = GL_FALSE;
+                  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]) {
+		     t->Complete = GL_FALSE;
+		     incomplete(t, "CubeMap Image[n][i] == NULL");
+		     return;
+		  }
+		  /* Don't support GL_DEPTH_COMPONENT for cube maps */
+		  if (t->Image[face][i]->Format == GL_DEPTH_COMPONENT) {
+		     t->Complete = GL_FALSE;
+		     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) {
+		     t->Complete = GL_FALSE;
+		     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");
+      }
+   }
+}
+
+/*@}*/
+
+
+/***********************************************************************/
+/** \name API functions */
+/*@{*/
+
+/**
+ * Texture name generation lock.
+ *
+ * Used by _mesa_GenTextures() to guarantee that the generation and allocation
+ * of texture IDs is atomic.
+ */
+_glthread_DECLARE_STATIC_MUTEX(GenTexturesLock);
+
+/**
+ * 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().
+ *
+ * While holding the GenTexturesLock lock, 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(GenTexturesLock);
+
+   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(GenTexturesLock);
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTextures");
+         return;
+      }
+
+      /* insert into hash table */
+      _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
+      _mesa_HashInsert(ctx->Shared->TexObjects, texObj->Name, texObj);
+      _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+
+      textures[i] = name;
+   }
+
+   _glthread_UNLOCK_MUTEX(GenTexturesLock);
+}
+
+
+/**
+ * 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 = (struct gl_texture_object *)
+            _mesa_HashLookup(ctx->Shared->TexObjects, textures[i]);
+         if (delObj) {
+            /* First check if this texture is currently bound.
+             * If so, unbind it and decrement the reference count.
+             * XXX all RefCount accesses should be protected by a mutex.
+             */
+            GLuint u;
+            for (u = 0; u < MAX_TEXTURE_IMAGE_UNITS; u++) {
+               struct gl_texture_unit *unit = &ctx->Texture.Unit[u];
+               if (delObj == unit->Current1D) {
+                  unit->Current1D = ctx->Shared->Default1D;
+                  ctx->Shared->Default1D->RefCount++;
+                  delObj->RefCount--;
+                  if (delObj == unit->_Current)
+                     unit->_Current = unit->Current1D;
+               }
+               else if (delObj == unit->Current2D) {
+                  unit->Current2D = ctx->Shared->Default2D;
+                  ctx->Shared->Default2D->RefCount++;
+                  delObj->RefCount--;
+                  if (delObj == unit->_Current)
+                     unit->_Current = unit->Current2D;
+               }
+               else if (delObj == unit->Current3D) {
+                  unit->Current3D = ctx->Shared->Default3D;
+                  ctx->Shared->Default3D->RefCount++;
+                  delObj->RefCount--;
+                  if (delObj == unit->_Current)
+                     unit->_Current = unit->Current3D;
+               }
+               else if (delObj == unit->CurrentCubeMap) {
+                  unit->CurrentCubeMap = ctx->Shared->DefaultCubeMap;
+                  ctx->Shared->DefaultCubeMap->RefCount++;
+                  delObj->RefCount--;
+                  if (delObj == unit->_Current)
+                     unit->_Current = unit->CurrentCubeMap;
+               }
+               else if (delObj == unit->CurrentRect) {
+                  unit->CurrentRect = ctx->Shared->DefaultRect;
+                  ctx->Shared->DefaultRect->RefCount++;
+                  delObj->RefCount--;
+                  if (delObj == unit->_Current)
+                     unit->_Current = unit->CurrentRect;
+               }
+            }
+            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);
+
+            /* The actual texture object will not be freed until it's no
+             * longer bound in any context.
+             * XXX all RefCount accesses should be protected by a mutex.
+             */
+            delObj->RefCount--;
+            if (delObj->RefCount == 0) {
+               ASSERT(delObj->Name != 0); /* Never delete default tex objs */
+               ASSERT(ctx->Driver.DeleteTexture);
+               (*ctx->Driver.DeleteTexture)(ctx, delObj);
+            }
+         }
+      }
+   }
+}
+
+
+/**
+ * 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);
+   GLuint unit = ctx->Texture.CurrentUnit;
+   struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
+   struct gl_texture_object *oldTexObj;
+   struct gl_texture_object *newTexObj = NULL;
+   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);
+
+   /*
+    * Get pointer to currently bound texture object (oldTexObj)
+    */
+   switch (target) {
+      case GL_TEXTURE_1D:
+         oldTexObj = texUnit->Current1D;
+         break;
+      case GL_TEXTURE_2D:
+         oldTexObj = texUnit->Current2D;
+         break;
+      case GL_TEXTURE_3D:
+         oldTexObj = texUnit->Current3D;
+         break;
+      case GL_TEXTURE_CUBE_MAP_ARB:
+         if (!ctx->Extensions.ARB_texture_cube_map) {
+            _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
+            return;
+         }
+         oldTexObj = texUnit->CurrentCubeMap;
+         break;
+      case GL_TEXTURE_RECTANGLE_NV:
+         if (!ctx->Extensions.NV_texture_rectangle) {
+            _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
+            return;
+         }
+         oldTexObj = texUnit->CurrentRect;
+         break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glBindTexture(target)" );
+         return;
+   }
+
+   if (oldTexObj->Name == texName)
+      /* XXX this might be wrong.  If the texobj is in use by another
+       * context and a texobj parameter was changed, this might be our
+       * only chance to update this context's hardware state.
+       */
+      return;   /* rebinding the same texture- no change */
+
+   /*
+    * Get pointer to new texture object (newTexObj)
+    */
+   if (texName == 0) {
+      /* newTexObj = a default texture object */
+      switch (target) {
+         case GL_TEXTURE_1D:
+            newTexObj = ctx->Shared->Default1D;
+            break;
+         case GL_TEXTURE_2D:
+            newTexObj = ctx->Shared->Default2D;
+            break;
+         case GL_TEXTURE_3D:
+            newTexObj = ctx->Shared->Default3D;
+            break;
+         case GL_TEXTURE_CUBE_MAP_ARB:
+            newTexObj = ctx->Shared->DefaultCubeMap;
+            break;
+         case GL_TEXTURE_RECTANGLE_NV:
+            newTexObj = ctx->Shared->DefaultRect;
+            break;
+         default:
+            ; /* Bad targets are caught above */
+      }
+   }
+   else {
+      /* non-default texture object */
+      const struct _mesa_HashTable *hash = ctx->Shared->TexObjects;
+      newTexObj = (struct gl_texture_object *) _mesa_HashLookup(hash, texName);
+      if (newTexObj) {
+         /* error checking */
+         if (newTexObj->Target != 0 && newTexObj->Target != target) {
+            /* the named texture object's dimensions don't match the target */
+            _mesa_error( ctx, GL_INVALID_OPERATION,
+                         "glBindTexture(wrong dimensionality)" );
+            return;
+         }
+         if (newTexObj->Target == 0 && target == GL_TEXTURE_RECTANGLE_NV) {
+            /* have to init wrap and filter state here - kind of klunky */
+            newTexObj->WrapS = GL_CLAMP_TO_EDGE;
+            newTexObj->WrapT = GL_CLAMP_TO_EDGE;
+            newTexObj->WrapR = GL_CLAMP_TO_EDGE;
+            newTexObj->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, newTexObj, GL_TEXTURE_WRAP_S, fparam_wrap );
+               (*ctx->Driver.TexParameter)( ctx, target, newTexObj, GL_TEXTURE_WRAP_T, fparam_wrap );
+               (*ctx->Driver.TexParameter)( ctx, target, newTexObj, GL_TEXTURE_WRAP_R, fparam_wrap );
+               (*ctx->Driver.TexParameter)( ctx, target, newTexObj, GL_TEXTURE_MIN_FILTER, fparam_filter );
+            }
+         }
+      }
+      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;
+   }
+
+   /* XXX all RefCount accesses should be protected by a mutex. */
+   newTexObj->RefCount++;
+
+   /* do the actual binding, but first flush outstanding vertices:
+    */
+   FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+
+   switch (target) {
+      case GL_TEXTURE_1D:
+         texUnit->Current1D = newTexObj;
+         break;
+      case GL_TEXTURE_2D:
+         texUnit->Current2D = newTexObj;
+         break;
+      case GL_TEXTURE_3D:
+         texUnit->Current3D = newTexObj;
+         break;
+      case GL_TEXTURE_CUBE_MAP_ARB:
+         texUnit->CurrentCubeMap = newTexObj;
+         break;
+      case GL_TEXTURE_RECTANGLE_NV:
+         texUnit->CurrentRect = newTexObj;
+         break;
+      default:
+         _mesa_problem(ctx, "bad target in BindTexture");
+         return;
+   }
+
+   /* Pass BindTexture call to device driver */
+   if (ctx->Driver.BindTexture)
+      (*ctx->Driver.BindTexture)( ctx, target, newTexObj );
+
+   /* Decrement the reference count on the old texture and check if it's
+    * time to delete it.
+    */
+   /* XXX all RefCount accesses should be protected by a mutex. */
+   oldTexObj->RefCount--;
+   ASSERT(oldTexObj->RefCount >= 0);
+   if (oldTexObj->RefCount == 0) {
+      ASSERT(oldTexObj->Name != 0);
+      ASSERT(ctx->Driver.DeleteTexture);
+      (*ctx->Driver.DeleteTexture)( ctx, oldTexObj );
+   }
+}
+
+
+/**
+ * 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 = (struct gl_texture_object *)
+            _mesa_HashLookup(ctx->Shared->TexObjects, texName[i]);
+         if (t) {
+            t->Priority = CLAMP( priorities[i], 0.0F, 1.0F );
+	    if (ctx->Driver.PrioritizeTexture)
+	       ctx->Driver.PrioritizeTexture( ctx, t, t->Priority );
+         }
+      }
+   }
+
+   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 = (struct gl_texture_object *)
+         _mesa_HashLookup(ctx->Shared->TexObjects, 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 = (struct gl_texture_object *)
+      _mesa_HashLookup(ctx->Shared->TexObjects, texture);
+
+   /* IsTexture is true only after object has been bound once. */
+   return t && t->Target;
+}
+
+/*@}*/