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, 1357 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/main/fbobject.c b/nx-X11/extras/Mesa/src/mesa/main/fbobject.c
new file mode 100644
index 000000000..b16e13a22
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/main/fbobject.c
@@ -0,0 +1,1357 @@
+/*
+ * 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.
+ */
+
+
+/*
+ * Authors:
+ *   Brian Paul
+ */
+
+
+#include "context.h"
+#include "fbobject.h"
+#include "framebuffer.h"
+#include "hash.h"
+#include "renderbuffer.h"
+#include "teximage.h"
+#include "texstore.h"
+
+
+/**
+ * Notes:
+ *
+ * None of the GL_EXT_framebuffer_object functions are compiled into
+ * display lists.
+ */
+
+
+
+/*
+ * When glGenRender/FramebuffersEXT() is called we insert pointers to
+ * these placeholder objects into the hash table.
+ * Later, when the object ID is first bound, we replace the placeholder
+ * with the real frame/renderbuffer.
+ */
+static struct gl_framebuffer DummyFramebuffer;
+static struct gl_renderbuffer DummyRenderbuffer;
+
+
+#define IS_CUBE_FACE(TARGET) \
+   ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
+    (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
+
+
+/**
+ * Helper routine for getting a gl_renderbuffer.
+ */
+static struct gl_renderbuffer *
+lookup_renderbuffer(GLcontext *ctx, GLuint id)
+{
+   struct gl_renderbuffer *rb;
+
+   if (id == 0)
+      return NULL;
+
+   rb = (struct gl_renderbuffer *)
+      _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
+   return rb;
+}
+
+
+/**
+ * Helper routine for getting a gl_framebuffer.
+ */
+static struct gl_framebuffer *
+lookup_framebuffer(GLcontext *ctx, GLuint id)
+{
+   struct gl_framebuffer *fb;
+
+   if (id == 0)
+      return NULL;
+
+   fb = (struct gl_framebuffer *)
+      _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
+   return fb;
+}
+
+
+/**
+ * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
+ * gl_renderbuffer_attachment object.
+ */
+static struct gl_renderbuffer_attachment *
+get_attachment(GLcontext *ctx, struct gl_framebuffer *fb, GLenum attachment)
+{
+   GLuint i;
+
+   switch (attachment) {
+   case GL_COLOR_ATTACHMENT0_EXT:
+   case GL_COLOR_ATTACHMENT1_EXT:
+   case GL_COLOR_ATTACHMENT2_EXT:
+   case GL_COLOR_ATTACHMENT3_EXT:
+   case GL_COLOR_ATTACHMENT4_EXT:
+   case GL_COLOR_ATTACHMENT5_EXT:
+   case GL_COLOR_ATTACHMENT6_EXT:
+   case GL_COLOR_ATTACHMENT7_EXT:
+   case GL_COLOR_ATTACHMENT8_EXT:
+   case GL_COLOR_ATTACHMENT9_EXT:
+   case GL_COLOR_ATTACHMENT10_EXT:
+   case GL_COLOR_ATTACHMENT11_EXT:
+   case GL_COLOR_ATTACHMENT12_EXT:
+   case GL_COLOR_ATTACHMENT13_EXT:
+   case GL_COLOR_ATTACHMENT14_EXT:
+   case GL_COLOR_ATTACHMENT15_EXT:
+      i = attachment - GL_COLOR_ATTACHMENT0_EXT;
+      if (i >= ctx->Const.MaxColorAttachments) {
+	 return NULL;
+      }
+      return &fb->Attachment[BUFFER_COLOR0 + i];
+   case GL_DEPTH_ATTACHMENT_EXT:
+      return &fb->Attachment[BUFFER_DEPTH];
+   case GL_STENCIL_ATTACHMENT_EXT:
+      return &fb->Attachment[BUFFER_STENCIL];
+   default:
+      return NULL;
+   }
+}
+
+
+/**
+ * Remove any texture or renderbuffer attached to the given attachment
+ * point.  Update reference counts, etc.
+ */
+void
+_mesa_remove_attachment(GLcontext *ctx, struct gl_renderbuffer_attachment *att)
+{
+   if (att->Type == GL_TEXTURE) {
+      ASSERT(att->Texture);
+      if (att->Renderbuffer) {
+         /* delete/remove the 'wrapper' renderbuffer */
+         /* XXX do we really want to do this??? */
+         att->Renderbuffer->Delete(att->Renderbuffer);
+         att->Renderbuffer = NULL;
+      }
+      att->Texture->RefCount--;
+      if (att->Texture->RefCount == 0) {
+	 ctx->Driver.DeleteTexture(ctx, att->Texture);
+      }
+      att->Texture = NULL;
+   }
+   else if (att->Type == GL_RENDERBUFFER_EXT) {
+      ASSERT(att->Renderbuffer);
+      ASSERT(!att->Texture);
+      att->Renderbuffer->RefCount--;
+      if (att->Renderbuffer->RefCount == 0) {
+         att->Renderbuffer->Delete(att->Renderbuffer);
+      }
+      att->Renderbuffer = NULL;
+   }
+   att->Type = GL_NONE;
+   att->Complete = GL_TRUE;
+}
+
+
+/**
+ * Bind a texture object to an attachment point.
+ * The previous binding, if any, will be removed first.
+ */
+void
+_mesa_set_texture_attachment(GLcontext *ctx,
+                             struct gl_renderbuffer_attachment *att,
+                             struct gl_texture_object *texObj,
+                             GLenum texTarget, GLuint level, GLuint zoffset)
+{
+   _mesa_remove_attachment(ctx, att);
+   att->Type = GL_TEXTURE;
+   att->Texture = texObj;
+   att->TextureLevel = level;
+   if (IS_CUBE_FACE(texTarget)) {
+      att->CubeMapFace = texTarget - GL_TEXTURE_CUBE_MAP_POSITIVE_X;
+   }
+   else {
+      att->CubeMapFace = 0;
+   }
+   att->Zoffset = zoffset;
+   att->Complete = GL_FALSE;
+
+   texObj->RefCount++;
+
+   /* XXX when we attach to a texture, we should probably set the
+    * att->Renderbuffer pointer to a "wrapper renderbuffer" which
+    * makes the texture image look like renderbuffer.
+    */
+}
+
+
+/**
+ * Bind a renderbuffer to an attachment point.
+ * The previous binding, if any, will be removed first.
+ */
+void
+_mesa_set_renderbuffer_attachment(GLcontext *ctx,
+                                  struct gl_renderbuffer_attachment *att,
+                                  struct gl_renderbuffer *rb)
+{
+   _mesa_remove_attachment(ctx, att);
+   att->Type = GL_RENDERBUFFER_EXT;
+   att->Renderbuffer = rb;
+   att->Texture = NULL; /* just to be safe */
+   att->Complete = GL_FALSE;
+   rb->RefCount++;
+}
+
+
+/**
+ * Fallback for ctx->Driver.FramebufferRenderbuffer()
+ * Sets a framebuffer attachment to a particular renderbuffer.
+ * The framebuffer in question is ctx->DrawBuffer.
+ * \sa _mesa_renderbuffer_texture
+ */
+void
+_mesa_framebuffer_renderbuffer(GLcontext *ctx,
+                               struct gl_renderbuffer_attachment *att,
+                               struct gl_renderbuffer *rb)
+{
+   if (rb) {
+      _mesa_set_renderbuffer_attachment(ctx, att, rb);
+   }
+   else {
+      _mesa_remove_attachment(ctx, att);
+   }
+}
+
+
+/**
+ * Test if an attachment point is complete and update its Complete field.
+ * \param format if GL_COLOR, this is a color attachment point,
+ *               if GL_DEPTH, this is a depth component attachment point,
+ *               if GL_STENCIL, this is a stencil component attachment point.
+ */
+static void
+test_attachment_completeness(const GLcontext *ctx, GLenum format,
+                             struct gl_renderbuffer_attachment *att)
+{
+   assert(format == GL_COLOR || format == GL_DEPTH || format == GL_STENCIL);
+
+   /* assume complete */
+   att->Complete = GL_TRUE;
+
+   /* Look for reasons why the attachment might be incomplete */
+   if (att->Type == GL_TEXTURE) {
+      const struct gl_texture_object *texObj = att->Texture;
+      struct gl_texture_image *texImage;
+
+      if (!texObj) {
+         att->Complete = GL_FALSE;
+         return;
+      }
+
+      texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];
+      if (!texImage) {
+         att->Complete = GL_FALSE;
+         return;
+      }
+      if (texImage->Width < 1 || texImage->Height < 1) {
+         att->Complete = GL_FALSE;
+         return;
+      }
+      if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {
+         att->Complete = GL_FALSE;
+         return;
+      }
+
+      if (format == GL_COLOR) {
+         if (texImage->TexFormat->BaseFormat != GL_RGB &&
+             texImage->TexFormat->BaseFormat != GL_RGBA) {
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+      else if (format == GL_DEPTH) {
+         if (texImage->TexFormat->BaseFormat != GL_DEPTH_COMPONENT) {
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+      else {
+         /* no such thing as stencil textures */
+         att->Complete = GL_FALSE;
+         return;
+      }
+   }
+   else if (att->Type == GL_RENDERBUFFER_EXT) {
+      if (att->Renderbuffer->Width < 1 || att->Renderbuffer->Height < 1) {
+         att->Complete = GL_FALSE;
+         return;
+      }
+      if (format == GL_COLOR) {
+         if (att->Renderbuffer->_BaseFormat != GL_RGB &&
+             att->Renderbuffer->_BaseFormat != GL_RGBA) {
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+      else if (format == GL_DEPTH) {
+         if (att->Renderbuffer->_BaseFormat != GL_DEPTH_COMPONENT) {
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+      else {
+         assert(format == GL_STENCIL);
+         if (att->Renderbuffer->_BaseFormat != GL_STENCIL_INDEX) {
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+   }
+   else {
+      ASSERT(att->Type == GL_NONE);
+      /* complete */
+      return;
+   }
+}
+
+
+/**
+ * Test if the given framebuffer object is complete and update its
+ * Status field with the results.
+ * Also update the framebuffer's Width and Height fields if the
+ * framebuffer is complete.
+ */
+void
+_mesa_test_framebuffer_completeness(GLcontext *ctx, struct gl_framebuffer *fb)
+{
+   GLuint numImages, width = 0, height = 0;
+   GLenum intFormat = GL_NONE;
+   GLuint w = 0, h = 0;
+   GLint i;
+
+   assert(fb->Name != 0);
+
+   numImages = 0;
+   fb->Width = 0;
+   fb->Height = 0;
+
+   /* Start at -2 to more easily loop over all attachment points */
+   for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
+      struct gl_renderbuffer_attachment *att;
+      GLenum f;
+
+      if (i == -2) {
+         att = &fb->Attachment[BUFFER_DEPTH];
+         test_attachment_completeness(ctx, GL_DEPTH, att);
+         if (!att->Complete) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
+            return;
+         }
+      }
+      else if (i == -1) {
+         att = &fb->Attachment[BUFFER_STENCIL];
+         test_attachment_completeness(ctx, GL_STENCIL, att);
+         if (!att->Complete) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
+            return;
+         }
+      }
+      else {
+         att = &fb->Attachment[BUFFER_COLOR0 + i];
+         test_attachment_completeness(ctx, GL_COLOR, att);
+         if (!att->Complete) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
+            return;
+         }
+      }
+
+      if (att->Type == GL_TEXTURE) {
+         w = att->Texture->Image[att->CubeMapFace][att->TextureLevel]->Width;
+         h = att->Texture->Image[att->CubeMapFace][att->TextureLevel]->Height;
+         f = att->Texture->Image[att->CubeMapFace][att->TextureLevel]->Format;
+         numImages++;
+         if (f != GL_RGB && f != GL_RGBA && f != GL_DEPTH_COMPONENT) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
+            return;
+         }
+      }
+      else if (att->Type == GL_RENDERBUFFER_EXT) {
+         w = att->Renderbuffer->Width;
+         h = att->Renderbuffer->Height;
+         f = att->Renderbuffer->InternalFormat;
+         numImages++;
+      }
+      else {
+         assert(att->Type == GL_NONE);
+         continue;
+      }
+
+      if (numImages == 1) {
+         /* set required width, height and format */
+         width = w;
+         height = h;
+         if (i >= 0)
+            intFormat = f;
+      }
+      else {
+         /* check that width, height, format are same */
+         if (w != width || h != height) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
+            return;
+         }
+         if (intFormat != GL_NONE && f != intFormat) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
+            return;
+         }
+      }
+   }
+
+   /* Check that all DrawBuffers are present */
+   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
+      if (fb->ColorDrawBuffer[i] != GL_NONE) {
+         const struct gl_renderbuffer_attachment *att
+            = get_attachment(ctx, fb, fb->ColorDrawBuffer[i]);
+         assert(att);
+         if (att->Type == GL_NONE) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
+            return;
+         }
+      }
+   }
+
+   /* Check that the ReadBuffer is present */
+   if (fb->ColorReadBuffer != GL_NONE) {
+      const struct gl_renderbuffer_attachment *att
+         = get_attachment(ctx, fb, fb->ColorReadBuffer);
+      assert(att);
+      if (att->Type == GL_NONE) {
+         fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
+         return;
+      }
+   }
+
+   /* Check if any renderbuffer is attached more than once */
+   for (i = 0; i < BUFFER_COUNT - 1; i++) {
+      struct gl_renderbuffer *rb_i = fb->Attachment[i].Renderbuffer;
+      if (rb_i) {
+         GLint j;
+         for (j = i + 1; j < BUFFER_COUNT; j++) {
+            struct gl_renderbuffer *rb_j = fb->Attachment[j].Renderbuffer;
+            if (rb_i == rb_j) {
+               fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT;
+               return;
+            }
+         }
+      }
+   }
+
+
+   if (numImages == 0) {
+      fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
+      return;
+   }
+
+   /*
+    * If we get here, the framebuffer is complete!
+    */
+   fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
+   fb->Width = w;
+   fb->Height = h;
+}
+
+
+GLboolean GLAPIENTRY
+_mesa_IsRenderbufferEXT(GLuint renderbuffer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+   if (renderbuffer) {
+      struct gl_renderbuffer *rb = lookup_renderbuffer(ctx, renderbuffer);
+      if (rb != NULL && rb != &DummyRenderbuffer)
+         return GL_TRUE;
+   }
+   return GL_FALSE;
+}
+
+
+void GLAPIENTRY
+_mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
+{
+   struct gl_renderbuffer *newRb, *oldRb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_RENDERBUFFER_EXT) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glBindRenderbufferEXT(target)");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   if (renderbuffer) {
+      newRb = lookup_renderbuffer(ctx, renderbuffer);
+      if (newRb == &DummyRenderbuffer) {
+         /* ID was reserved, but no real renderbuffer object made yet */
+         newRb = NULL;
+      }
+      if (!newRb) {
+	 /* create new renderbuffer object */
+	 newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
+	 if (!newRb) {
+	    _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
+	    return;
+	 }
+         ASSERT(newRb->AllocStorage);
+         _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
+      }
+      newRb->RefCount++;
+   }
+   else {
+      newRb = NULL;
+   }
+
+   oldRb = ctx->CurrentRenderbuffer;
+   if (oldRb) {
+      oldRb->RefCount--;
+      if (oldRb->RefCount == 0) {
+         oldRb->Delete(oldRb);
+      }
+   }
+
+   ASSERT(newRb != &DummyRenderbuffer);
+
+   ctx->CurrentRenderbuffer = newRb;
+}
+
+
+void GLAPIENTRY
+_mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
+{
+   GLint i;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   for (i = 0; i < n; i++) {
+      if (renderbuffers[i] > 0) {
+	 struct gl_renderbuffer *rb;
+	 rb = lookup_renderbuffer(ctx, renderbuffers[i]);
+	 if (rb) {
+            /* check if deleting currently bound renderbuffer object */
+            if (rb == ctx->CurrentRenderbuffer) {
+               /* bind default */
+               ASSERT(rb->RefCount >= 2);
+               _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
+            }
+
+	    /* remove from hash table immediately, to free the ID */
+	    _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
+
+            if (rb != &DummyRenderbuffer) {
+               /* But the object will not be freed until it's no longer
+                * bound in any context.
+                */
+               rb->RefCount--;
+               if (rb->RefCount == 0) {
+                  rb->Delete(rb);
+               }
+	    }
+	 }
+      }
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint first;
+   GLint i;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (n < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
+      return;
+   }
+
+   if (!renderbuffers)
+      return;
+
+   first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
+
+   for (i = 0; i < n; i++) {
+      GLuint name = first + i;
+      renderbuffers[i] = name;
+      /* insert dummy placeholder into hash table */
+      _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
+      _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
+      _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+   }
+}
+
+
+/**
+ * Given an internal format token for a render buffer, return the
+ * corresponding base format.
+ * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
+ *  or zero if error.
+ */
+static GLenum
+base_internal_format(GLcontext *ctx, GLenum internalFormat)
+{
+   switch (internalFormat) {
+   case GL_RGB:
+   case GL_R3_G3_B2:
+   case GL_RGB4:
+   case GL_RGB5:
+   case GL_RGB8:
+   case GL_RGB10:
+   case GL_RGB12:
+   case GL_RGB16:
+      return GL_RGB;
+   case GL_RGBA:
+   case GL_RGBA2:
+   case GL_RGBA4:
+   case GL_RGB5_A1:
+   case GL_RGBA8:
+   case GL_RGB10_A2:
+   case GL_RGBA12:
+   case GL_RGBA16:
+      return GL_RGBA;
+   case GL_STENCIL_INDEX:
+   case GL_STENCIL_INDEX1_EXT:
+   case GL_STENCIL_INDEX4_EXT:
+   case GL_STENCIL_INDEX8_EXT:
+   case GL_STENCIL_INDEX16_EXT:
+      return GL_STENCIL_INDEX;
+   case GL_DEPTH_COMPONENT:
+   case GL_DEPTH_COMPONENT16:
+   case GL_DEPTH_COMPONENT24:
+   case GL_DEPTH_COMPONENT32:
+      return GL_DEPTH_COMPONENT;
+   /* XXX add floating point formats eventually */
+   default:
+      return 0;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
+                             GLsizei width, GLsizei height)
+{
+   struct gl_renderbuffer *rb;
+   GLenum baseFormat;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_RENDERBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glRenderbufferStorageEXT(target)");
+      return;
+   }
+
+   baseFormat = base_internal_format(ctx, internalFormat);
+   if (baseFormat == 0) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glRenderbufferStorageEXT(internalFormat)");
+      return;
+   }
+
+   if (width < 1 || width > ctx->Const.MaxRenderbufferSize) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glRenderbufferStorageEXT(width)");
+      return;
+   }
+
+   if (height < 1 || height > ctx->Const.MaxRenderbufferSize) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glRenderbufferStorageEXT(height)");
+      return;
+   }
+
+   rb = ctx->CurrentRenderbuffer;
+
+   if (!rb) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glRenderbufferStorageEXT");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   /* Now allocate the storage */
+   ASSERT(rb->AllocStorage);
+   if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
+      /* No error - check/set fields now */
+      assert(rb->Width == width);
+      assert(rb->Height == height);
+      assert(rb->InternalFormat);
+      rb->_BaseFormat = baseFormat;
+   }
+   else {
+      /* Probably ran out of memory - clear the fields */
+      rb->Width = 0;
+      rb->Height = 0;
+      rb->InternalFormat = GL_NONE;
+      rb->_BaseFormat = GL_NONE;
+   }
+
+   /*
+   test_framebuffer_completeness(ctx, fb);
+   */
+   /* XXX if this renderbuffer is attached anywhere, invalidate attachment
+    * points???
+    */
+}
+
+
+void GLAPIENTRY
+_mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_RENDERBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetRenderbufferParameterivEXT(target)");
+      return;
+   }
+
+   if (!ctx->CurrentRenderbuffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetRenderbufferParameterivEXT");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   switch (pname) {
+   case GL_RENDERBUFFER_WIDTH_EXT:
+      *params = ctx->CurrentRenderbuffer->Width;
+      return;
+   case GL_RENDERBUFFER_HEIGHT_EXT:
+      *params = ctx->CurrentRenderbuffer->Height;
+      return;
+   case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
+      *params = ctx->CurrentRenderbuffer->InternalFormat;
+      return;
+   case GL_RENDERBUFFER_RED_SIZE_EXT:
+      if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
+          ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
+         *params = ctx->CurrentRenderbuffer->ComponentSizes[0];
+      }
+      else {
+         *params = 0;
+      }
+      break;
+   case GL_RENDERBUFFER_GREEN_SIZE_EXT:
+      if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
+          ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
+         *params = ctx->CurrentRenderbuffer->ComponentSizes[1];
+      }
+      else {
+         *params = 0;
+      }
+      break;
+   case GL_RENDERBUFFER_BLUE_SIZE_EXT:
+      if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
+          ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
+         *params = ctx->CurrentRenderbuffer->ComponentSizes[2];
+      }
+      else {
+         *params = 0;
+      }
+      break;
+   case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
+      if (ctx->CurrentRenderbuffer->_BaseFormat == GL_RGB ||
+          ctx->CurrentRenderbuffer->_BaseFormat == GL_RGBA) {
+         *params = ctx->CurrentRenderbuffer->ComponentSizes[3];
+      }
+      else {
+         *params = 0;
+      }
+      break;
+   case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
+      if (ctx->CurrentRenderbuffer->_BaseFormat == GL_DEPTH_COMPONENT) {
+         *params = ctx->CurrentRenderbuffer->ComponentSizes[0];
+      }
+      else {
+         *params = 0;
+      }
+      break;
+   case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
+      if (ctx->CurrentRenderbuffer->_BaseFormat == GL_STENCIL_INDEX) {
+         *params = ctx->CurrentRenderbuffer->ComponentSizes[0];
+      }
+      else {
+         *params = 0;
+      }
+      break;
+
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetRenderbufferParameterivEXT(target)");
+      return;
+   }
+}
+
+
+GLboolean GLAPIENTRY
+_mesa_IsFramebufferEXT(GLuint framebuffer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+   if (framebuffer) {
+      struct gl_framebuffer *rb = lookup_framebuffer(ctx, framebuffer);
+      if (rb != NULL && rb != &DummyFramebuffer)
+         return GL_TRUE;
+   }
+   return GL_FALSE;
+}
+
+
+void GLAPIENTRY
+_mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
+{
+   struct gl_framebuffer *newFb, *newReadFb, *oldFb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_FRAMEBUFFER_EXT) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glBindFramebufferEXT(target)");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   if (framebuffer) {
+      /* Binding a user-created framebuffer object */
+      newFb = lookup_framebuffer(ctx, framebuffer);
+      if (newFb == &DummyFramebuffer) {
+         /* ID was reserved, but no real framebuffer object made yet */
+         newFb = NULL;
+      }
+      if (!newFb) {
+	 /* create new framebuffer object */
+	 newFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
+	 if (!newFb) {
+	    _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
+	    return;
+	 }
+         _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newFb);
+      }
+      newFb->RefCount++;
+      newReadFb = newFb;
+   }
+   else {
+      /* Binding the window system framebuffer (which was originally set
+       * with MakeCurrent).
+       */
+      newFb = ctx->WinSysDrawBuffer;
+      newReadFb = ctx->WinSysReadBuffer;
+   }
+
+   oldFb = ctx->DrawBuffer;
+   if (oldFb && oldFb->Name != 0) {
+      oldFb->RefCount--;
+      if (oldFb->RefCount == 0) {
+         oldFb->Delete(oldFb);
+      }
+   }
+
+   ASSERT(newFb != &DummyFramebuffer);
+
+   /* Note, we set both the GL_DRAW_BUFFER and GL_READ_BUFFER state: */
+   ctx->DrawBuffer = newFb;
+   ctx->ReadBuffer = newReadFb;
+}
+
+
+void GLAPIENTRY
+_mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
+{
+   GLint i;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   for (i = 0; i < n; i++) {
+      if (framebuffers[i] > 0) {
+	 struct gl_framebuffer *fb;
+	 fb = lookup_framebuffer(ctx, framebuffers[i]);
+	 if (fb) {
+            ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
+
+            /* check if deleting currently bound framebuffer object */
+            if (fb == ctx->DrawBuffer) {
+               /* bind default */
+               ASSERT(fb->RefCount >= 2);
+               _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+            }
+
+	    /* remove from hash table immediately, to free the ID */
+	    _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
+
+            if (fb != &DummyFramebuffer) {
+               /* But the object will not be freed until it's no longer
+                * bound in any context.
+                */
+               fb->RefCount--;
+               if (fb->RefCount == 0) {
+                  fb->Delete(fb);
+               }
+	    }
+	 }
+      }
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint first;
+   GLint i;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (n < 0) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
+      return;
+   }
+
+   if (!framebuffers)
+      return;
+
+   first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
+
+   for (i = 0; i < n; i++) {
+      GLuint name = first + i;
+      framebuffers[i] = name;
+      /* insert dummy placeholder into hash table */
+      _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
+      _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
+      _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+   }
+}
+
+
+
+GLenum GLAPIENTRY
+_mesa_CheckFramebufferStatusEXT(GLenum target)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
+
+   if (target != GL_FRAMEBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
+      return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
+   }
+
+   if (ctx->DrawBuffer->Name == 0) {
+      /* The window system / default framebuffer is always complete */
+      return GL_FRAMEBUFFER_COMPLETE_EXT;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   _mesa_test_framebuffer_completeness(ctx, ctx->DrawBuffer);
+   return ctx->DrawBuffer->_Status;
+}
+
+
+
+/**
+ * Do error checking common to glFramebufferTexture1D/2D/3DEXT.
+ * \return GL_TRUE if any error, GL_FALSE otherwise
+ */
+static GLboolean
+error_check_framebuffer_texture(GLcontext *ctx, GLuint dims,
+                                GLenum target, GLenum attachment,
+                                GLenum textarget, GLuint texture, GLint level)
+{
+   ASSERT(dims >= 1 && dims <= 3);
+
+   if (target != GL_FRAMEBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferTexture%dDEXT(target)", dims);
+      return GL_TRUE;
+   }
+
+   /* check framebuffer binding */
+   if (ctx->DrawBuffer->Name == 0) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glFramebufferTexture%dDEXT", dims);
+      return GL_TRUE;
+   }
+
+   /* only check textarget, level if texture ID is non-zero */
+   if (texture) {
+      if ((dims == 1 && textarget != GL_TEXTURE_1D) ||
+	  (dims == 3 && textarget != GL_TEXTURE_3D) ||
+	  (dims == 2 && textarget != GL_TEXTURE_2D &&
+	   textarget != GL_TEXTURE_RECTANGLE_ARB &&
+	   !IS_CUBE_FACE(textarget))) {
+	 _mesa_error(ctx, GL_INVALID_VALUE,
+		     "glFramebufferTexture%dDEXT(textarget)", dims);
+	 return GL_TRUE;
+      }
+
+      if ((level < 0) || level >= _mesa_max_texture_levels(ctx, textarget)) {
+	 _mesa_error(ctx, GL_INVALID_VALUE,
+		     "glFramebufferTexture%dDEXT(level)", dims);
+	 return GL_TRUE;
+      }
+   }
+
+   return GL_FALSE;
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
+                              GLenum textarget, GLuint texture, GLint level)
+{
+   struct gl_renderbuffer_attachment *att;
+   struct gl_texture_object *texObj;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (error_check_framebuffer_texture(ctx, 1, target, attachment,
+				       textarget, texture, level))
+      return;
+
+   ASSERT(textarget == GL_TEXTURE_1D);
+
+   att = get_attachment(ctx, ctx->DrawBuffer, attachment);
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+		  "glFramebufferTexture1DEXT(attachment)");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   if (texture) {
+      texObj = (struct gl_texture_object *)
+	 _mesa_HashLookup(ctx->Shared->TexObjects, texture);
+      if (!texObj) {
+	 _mesa_error(ctx, GL_INVALID_VALUE,
+		     "glFramebufferTexture1DEXT(texture)");
+	 return;
+      }
+      if (texObj->Target != textarget) {
+	 _mesa_error(ctx, GL_INVALID_OPERATION, /* XXX correct error? */
+		     "glFramebufferTexture1DEXT(texture target)");
+	 return;
+      }
+   }
+   else {
+      /* remove texture attachment */
+      texObj = NULL;
+   }
+   ctx->Driver.RenderbufferTexture(ctx, att, texObj, textarget, level, 0);
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
+                              GLenum textarget, GLuint texture, GLint level)
+{
+   struct gl_renderbuffer_attachment *att;
+   struct gl_texture_object *texObj;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (error_check_framebuffer_texture(ctx, 2, target, attachment,
+				       textarget, texture, level))
+      return;
+
+   ASSERT(textarget == GL_TEXTURE_2D ||
+	  textarget == GL_TEXTURE_RECTANGLE_ARB ||
+	  IS_CUBE_FACE(textarget));
+
+   att = get_attachment(ctx, ctx->DrawBuffer, attachment);
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+		  "glFramebufferTexture2DEXT(attachment)");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   if (texture) {
+      texObj = (struct gl_texture_object *)
+	 _mesa_HashLookup(ctx->Shared->TexObjects, texture);
+      if (!texObj) {
+	 _mesa_error(ctx, GL_INVALID_VALUE,
+		     "glFramebufferTexture2DEXT(texture)");
+	 return;
+      }
+      if ((texObj->Target == GL_TEXTURE_2D && textarget != GL_TEXTURE_2D) ||
+	  (texObj->Target == GL_TEXTURE_RECTANGLE_ARB
+	   && textarget != GL_TEXTURE_RECTANGLE_ARB) ||
+	  (texObj->Target == GL_TEXTURE_CUBE_MAP
+	   && !IS_CUBE_FACE(textarget))) {
+	 _mesa_error(ctx, GL_INVALID_OPERATION, /* XXX correct error? */
+		     "glFramebufferTexture2DEXT(texture target)");
+	 return;
+      }
+   }
+   else {
+      /* remove texture attachment */
+      texObj = NULL;
+   }
+   ctx->Driver.RenderbufferTexture(ctx, att, texObj, textarget, level, 0);
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
+                              GLenum textarget, GLuint texture,
+                              GLint level, GLint zoffset)
+{
+   struct gl_renderbuffer_attachment *att;
+   struct gl_texture_object *texObj;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (error_check_framebuffer_texture(ctx, 3, target, attachment,
+				       textarget, texture, level))
+      return;
+
+   ASSERT(textarget == GL_TEXTURE_3D);
+
+   att = get_attachment(ctx, ctx->DrawBuffer, attachment);
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+		  "glFramebufferTexture1DEXT(attachment)");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   if (texture) {
+      const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
+      texObj = (struct gl_texture_object *)
+	 _mesa_HashLookup(ctx->Shared->TexObjects, texture);
+      if (!texObj) {
+	 _mesa_error(ctx, GL_INVALID_VALUE,
+		     "glFramebufferTexture3DEXT(texture)");
+	 return;
+      }
+      if (texObj->Target != textarget) {
+	 _mesa_error(ctx, GL_INVALID_OPERATION, /* XXX correct error? */
+		     "glFramebufferTexture3DEXT(texture target)");
+	 return;
+      }
+      if (zoffset < 0 || zoffset >= maxSize) {
+	 _mesa_error(ctx, GL_INVALID_VALUE,
+		     "glFramebufferTexture3DEXT(zoffset)");
+	 return;
+      }
+   }
+   else {
+      /* remove texture attachment */
+      texObj = NULL;
+   }
+   ctx->Driver.RenderbufferTexture(ctx, att, texObj, textarget,
+                                   level, zoffset);
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
+                                 GLenum renderbufferTarget,
+                                 GLuint renderbuffer)
+{
+   struct gl_renderbuffer_attachment *att;
+   struct gl_renderbuffer *rb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_FRAMEBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferRenderbufferEXT(target)");
+      return;
+   }
+
+   if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferRenderbufferEXT(renderbufferTarget)");
+      return;
+   }
+
+   if (ctx->DrawBuffer->Name == 0) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
+      return;
+   }
+
+   att = get_attachment(ctx, ctx->DrawBuffer, attachment);
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                 "glFramebufferRenderbufferEXT(attachment)");
+      return;
+   }
+
+   if (renderbuffer) {
+      rb = lookup_renderbuffer(ctx, renderbuffer);
+      if (!rb) {
+	 _mesa_error(ctx, GL_INVALID_OPERATION,
+		     "glFramebufferRenderbufferEXT(renderbuffer)");
+	 return;
+      }
+   }
+   else {
+      /* remove renderbuffer attachment */
+      rb = NULL;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   assert(ctx->Driver.FramebufferRenderbuffer);
+   ctx->Driver.FramebufferRenderbuffer(ctx, att, rb);
+}
+
+
+void GLAPIENTRY
+_mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
+                                             GLenum pname, GLint *params)
+{
+   const struct gl_renderbuffer_attachment *att;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_FRAMEBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetFramebufferAttachmentParameterivEXT(target)");
+      return;
+   }
+
+   if (ctx->DrawBuffer->Name == 0) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetFramebufferAttachmentParameterivEXT");
+      return;
+   }
+
+   att = get_attachment(ctx, ctx->DrawBuffer, attachment);
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetFramebufferAttachmentParameterivEXT(attachment)");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   switch (pname) {
+   case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
+      *params = att->Type;
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
+      if (att->Type == GL_RENDERBUFFER_EXT) {
+	 *params = att->Renderbuffer->Name;
+      }
+      else if (att->Type == GL_TEXTURE) {
+	 *params = att->Texture->Name;
+      }
+      else {
+	 _mesa_error(ctx, GL_INVALID_ENUM,
+		     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
+      if (att->Type == GL_TEXTURE) {
+	 *params = att->TextureLevel;
+      }
+      else {
+	 _mesa_error(ctx, GL_INVALID_ENUM,
+		     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
+      if (att->Type == GL_TEXTURE) {
+	 *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
+      }
+      else {
+	 _mesa_error(ctx, GL_INVALID_ENUM,
+		     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
+      if (att->Type == GL_TEXTURE) {
+	 *params = att->Zoffset;
+      }
+      else {
+	 _mesa_error(ctx, GL_INVALID_ENUM,
+		     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      return;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetFramebufferAttachmentParameterivEXT(pname)");
+      return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GenerateMipmapEXT(GLenum target)
+{
+   struct gl_texture_unit *texUnit;
+   struct gl_texture_object *texObj;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   switch (target) {
+   case GL_TEXTURE_1D:
+   case GL_TEXTURE_2D:
+   case GL_TEXTURE_3D:
+   case GL_TEXTURE_CUBE_MAP:
+      /* OK, legal value */
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
+      return;
+   }
+
+   texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+
+   /* XXX this might not handle cube maps correctly */
+   _mesa_generate_mipmap(ctx, target, texUnit, texObj);
+}