svn merge ^/branches/released .

1 files changed, 2413 insertions, 2413 deletions

diff --git a/mesalib/src/mesa/main/fbobject.c b/mesalib/src/mesa/main/fbobject.c
index 4ed2bb14e..ea9f803cb 100644
--- a/mesalib/src/mesa/main/fbobject.c
+++ b/mesalib/src/mesa/main/fbobject.c
@@ -1,2413 +1,2413 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.1

- *

- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.

- * Copyright (C) 1999-2009  VMware, Inc.  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.

- */

-

-

-/*

- * GL_EXT/ARB_framebuffer_object extensions

- *

- * Authors:

- *   Brian Paul

- */

-

-

-#include "buffers.h"

-#include "context.h"

-#include "enums.h"

-#include "fbobject.h"

-#include "formats.h"

-#include "framebuffer.h"

-#include "hash.h"

-#include "macros.h"

-#include "mfeatures.h"

-#include "mtypes.h"

-#include "renderbuffer.h"

-#include "state.h"

-#include "teximage.h"

-#include "texobj.h"

-

-

-/** Set this to 1 to help debug FBO incompleteness problems */

-#define DEBUG_FBO 0

-

-/** Set this to 1 to debug/log glBlitFramebuffer() calls */

-#define DEBUG_BLIT 0

-

-

-/**

- * 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;

-

-/* We bind this framebuffer when applications pass a NULL

- * drawable/surface in make current. */

-static struct gl_framebuffer IncompleteFramebuffer;

-

-

-#define IS_CUBE_FACE(TARGET) \

-   ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \

-    (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)

-

-

-static void

-delete_dummy_renderbuffer(struct gl_renderbuffer *rb)

-{

-   /* no op */

-}

-

-static void

-delete_dummy_framebuffer(struct gl_framebuffer *fb)

-{

-   /* no op */

-}

-

-

-void

-_mesa_init_fbobjects(struct gl_context *ctx)

-{

-   _glthread_INIT_MUTEX(DummyFramebuffer.Mutex);

-   _glthread_INIT_MUTEX(DummyRenderbuffer.Mutex);

-   _glthread_INIT_MUTEX(IncompleteFramebuffer.Mutex);

-   DummyFramebuffer.Delete = delete_dummy_framebuffer;

-   DummyRenderbuffer.Delete = delete_dummy_renderbuffer;

-   IncompleteFramebuffer.Delete = delete_dummy_framebuffer;

-}

-

-struct gl_framebuffer *

-_mesa_get_incomplete_framebuffer(void)

-{

-   return &IncompleteFramebuffer;

-}

-

-/**

- * Helper routine for getting a gl_renderbuffer.

- */

-struct gl_renderbuffer *

-_mesa_lookup_renderbuffer(struct gl_context *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.

- */

-struct gl_framebuffer *

-_mesa_lookup_framebuffer(struct gl_context *ctx, GLuint id)

-{

-   struct gl_framebuffer *fb;

-

-   if (id == 0)

-      return NULL;

-

-   fb = (struct gl_framebuffer *)

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

-   return fb;

-}

-

-

-/**

- * Mark the given framebuffer as invalid.  This will force the

- * test for framebuffer completeness to be done before the framebuffer

- * is used.

- */

-static void

-invalidate_framebuffer(struct gl_framebuffer *fb)

-{

-   fb->_Status = 0; /* "indeterminate" */

-}

-

-

-/**

- * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding

- * gl_renderbuffer_attachment object.

- * This function is only used for user-created FB objects, not the

- * default / window-system FB object.

- * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to

- * the depth buffer attachment point.

- */

-struct gl_renderbuffer_attachment *

-_mesa_get_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,

-                     GLenum attachment)

-{

-   GLuint i;

-

-   assert(fb->Name > 0);

-

-   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_STENCIL_ATTACHMENT:

-      /* fall-through */

-   case GL_DEPTH_BUFFER:

-      /* fall-through / new in GL 3.0 */

-   case GL_DEPTH_ATTACHMENT_EXT:

-      return &fb->Attachment[BUFFER_DEPTH];

-   case GL_STENCIL_BUFFER:

-      /* fall-through / new in GL 3.0 */

-   case GL_STENCIL_ATTACHMENT_EXT:

-      return &fb->Attachment[BUFFER_STENCIL];

-   default:

-      return NULL;

-   }

-}

-

-

-/**

- * As above, but only used for getting attachments of the default /

- * window-system framebuffer (not user-created framebuffer objects).

- */

-static struct gl_renderbuffer_attachment *

-_mesa_get_fb0_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,

-                         GLenum attachment)

-{

-   assert(fb->Name == 0);

-

-   switch (attachment) {

-   case GL_FRONT_LEFT:

-      return &fb->Attachment[BUFFER_FRONT_LEFT];

-   case GL_FRONT_RIGHT:

-      return &fb->Attachment[BUFFER_FRONT_RIGHT];

-   case GL_BACK_LEFT:

-      return &fb->Attachment[BUFFER_BACK_LEFT];

-   case GL_BACK_RIGHT:

-      return &fb->Attachment[BUFFER_BACK_RIGHT];

-   case GL_AUX0:

-      if (fb->Visual.numAuxBuffers == 1) {

-         return &fb->Attachment[BUFFER_AUX0];

-      }

-      return NULL;

-   case GL_DEPTH_BUFFER:

-      /* fall-through / new in GL 3.0 */

-   case GL_DEPTH_ATTACHMENT_EXT:

-      return &fb->Attachment[BUFFER_DEPTH];

-   case GL_STENCIL_BUFFER:

-      /* fall-through / new in GL 3.0 */

-   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(struct gl_context *ctx,

-                        struct gl_renderbuffer_attachment *att)

-{

-   if (att->Type == GL_TEXTURE) {

-      ASSERT(att->Texture);

-      if (ctx->Driver.FinishRenderTexture) {

-         /* tell driver that we're done rendering to this texture. */

-         ctx->Driver.FinishRenderTexture(ctx, att);

-      }

-      _mesa_reference_texobj(&att->Texture, NULL); /* unbind */

-      ASSERT(!att->Texture);

-   }

-   if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {

-      ASSERT(!att->Texture);

-      _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */

-      ASSERT(!att->Renderbuffer);

-   }

-   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(struct gl_context *ctx,

-                             struct gl_framebuffer *fb,

-                             struct gl_renderbuffer_attachment *att,

-                             struct gl_texture_object *texObj,

-                             GLenum texTarget, GLuint level, GLuint zoffset)

-{

-   if (att->Texture == texObj) {

-      /* re-attaching same texture */

-      ASSERT(att->Type == GL_TEXTURE);

-      if (ctx->Driver.FinishRenderTexture)

-	 ctx->Driver.FinishRenderTexture(ctx, att);

-   }

-   else {

-      /* new attachment */

-      if (ctx->Driver.FinishRenderTexture && att->Texture)

-	 ctx->Driver.FinishRenderTexture(ctx, att);

-      _mesa_remove_attachment(ctx, att);

-      att->Type = GL_TEXTURE;

-      assert(!att->Texture);

-      _mesa_reference_texobj(&att->Texture, texObj);

-   }

-

-   /* always update these fields */

-   att->TextureLevel = level;

-   att->CubeMapFace = _mesa_tex_target_to_face(texTarget);

-   att->Zoffset = zoffset;

-   att->Complete = GL_FALSE;

-

-   if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {

-      ctx->Driver.RenderTexture(ctx, fb, att);

-   }

-

-   invalidate_framebuffer(fb);

-}

-

-

-/**

- * Bind a renderbuffer to an attachment point.

- * The previous binding, if any, will be removed first.

- */

-void

-_mesa_set_renderbuffer_attachment(struct gl_context *ctx,

-                                  struct gl_renderbuffer_attachment *att,

-                                  struct gl_renderbuffer *rb)

-{

-   /* XXX check if re-doing same attachment, exit early */

-   _mesa_remove_attachment(ctx, att);

-   att->Type = GL_RENDERBUFFER_EXT;

-   att->Texture = NULL; /* just to be safe */

-   att->Complete = GL_FALSE;

-   _mesa_reference_renderbuffer(&att->Renderbuffer, rb);

-}

-

-

-/**

- * Fallback for ctx->Driver.FramebufferRenderbuffer()

- * Attach a renderbuffer object to a framebuffer object.

- */

-void

-_mesa_framebuffer_renderbuffer(struct gl_context *ctx,

-                               struct gl_framebuffer *fb,

-                               GLenum attachment, struct gl_renderbuffer *rb)

-{

-   struct gl_renderbuffer_attachment *att;

-

-   _glthread_LOCK_MUTEX(fb->Mutex);

-

-   att = _mesa_get_attachment(ctx, fb, attachment);

-   ASSERT(att);

-   if (rb) {

-      _mesa_set_renderbuffer_attachment(ctx, att, rb);

-      if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {

-         /* do stencil attachment here (depth already done above) */

-         att = _mesa_get_attachment(ctx, fb, GL_STENCIL_ATTACHMENT_EXT);

-         assert(att);

-         _mesa_set_renderbuffer_attachment(ctx, att, rb);

-      }

-   }

-   else {

-      _mesa_remove_attachment(ctx, att);

-   }

-

-   invalidate_framebuffer(fb);

-

-   _glthread_UNLOCK_MUTEX(fb->Mutex);

-}

-

-

-/**

- * For debug only.

- */

-static void

-att_incomplete(const char *msg)

-{

-#if DEBUG_FBO

-   _mesa_debug(NULL, "attachment incomplete: %s\n", msg);

-#else

-   (void) msg;

-#endif

-}

-

-

-/**

- * For debug only.

- */

-static void

-fbo_incomplete(const char *msg, int index)

-{

-#if DEBUG_FBO

-   _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);

-#else

-   (void) msg;

-   (void) index;

-#endif

-}

-

-

-/**

- * Is the given base format a legal format for a color renderbuffer?

- */

-GLboolean

-_mesa_is_legal_color_format(const struct gl_context *ctx, GLenum baseFormat)

-{

-   switch (baseFormat) {

-   case GL_RGB:

-   case GL_RGBA:

-      return GL_TRUE;

-   case GL_LUMINANCE:

-   case GL_LUMINANCE_ALPHA:

-   case GL_INTENSITY:

-   case GL_ALPHA:

-      return ctx->Extensions.ARB_framebuffer_object;

-   case GL_RED:

-   case GL_RG:

-      return ctx->Extensions.ARB_texture_rg;

-   default:

-      return GL_FALSE;

-   }

-}

-

-

-/**

- * Is the given base format a legal format for a depth/stencil renderbuffer?

- */

-static GLboolean

-is_legal_depth_format(const struct gl_context *ctx, GLenum baseFormat)

-{

-   switch (baseFormat) {

-   case GL_DEPTH_COMPONENT:

-   case GL_DEPTH_STENCIL_EXT:

-      return GL_TRUE;

-   default:

-      return GL_FALSE;

-   }

-}

-

-

-/**

- * 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 struct gl_context *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;

-      GLenum baseFormat;

-

-      if (!texObj) {

-         att_incomplete("no texobj");

-         att->Complete = GL_FALSE;

-         return;

-      }

-

-      texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];

-      if (!texImage) {

-         att_incomplete("no teximage");

-         att->Complete = GL_FALSE;

-         return;

-      }

-      if (texImage->Width < 1 || texImage->Height < 1) {

-         att_incomplete("teximage width/height=0");

-         printf("texobj = %u\n", texObj->Name);

-         printf("level = %d\n", att->TextureLevel);

-         att->Complete = GL_FALSE;

-         return;

-      }

-      if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {

-         att_incomplete("bad z offset");

-         att->Complete = GL_FALSE;

-         return;

-      }

-

-      baseFormat = _mesa_get_format_base_format(texImage->TexFormat);

-

-      if (format == GL_COLOR) {

-         if (!_mesa_is_legal_color_format(ctx, baseFormat)) {

-            att_incomplete("bad format");

-            att->Complete = GL_FALSE;

-            return;

-         }

-         if (_mesa_is_format_compressed(texImage->TexFormat)) {

-            att_incomplete("compressed internalformat");

-            att->Complete = GL_FALSE;

-            return;

-         }

-      }

-      else if (format == GL_DEPTH) {

-         if (baseFormat == GL_DEPTH_COMPONENT) {

-            /* OK */

-         }

-         else if (ctx->Extensions.EXT_packed_depth_stencil &&

-                  ctx->Extensions.ARB_depth_texture &&

-                  baseFormat == GL_DEPTH_STENCIL_EXT) {

-            /* OK */

-         }

-         else {

-            att->Complete = GL_FALSE;

-            att_incomplete("bad depth format");

-            return;

-         }

-      }

-      else {

-         ASSERT(format == GL_STENCIL);

-         if (ctx->Extensions.EXT_packed_depth_stencil &&

-             ctx->Extensions.ARB_depth_texture &&

-             baseFormat == GL_DEPTH_STENCIL_EXT) {

-            /* OK */

-         }

-         else {

-            /* no such thing as stencil-only textures */

-            att_incomplete("illegal stencil texture");

-            att->Complete = GL_FALSE;

-            return;

-         }

-      }

-   }

-   else if (att->Type == GL_RENDERBUFFER_EXT) {

-      const GLenum baseFormat =

-         _mesa_get_format_base_format(att->Renderbuffer->Format);

-

-      ASSERT(att->Renderbuffer);

-      if (!att->Renderbuffer->InternalFormat ||

-          att->Renderbuffer->Width < 1 ||

-          att->Renderbuffer->Height < 1) {

-         att_incomplete("0x0 renderbuffer");

-         att->Complete = GL_FALSE;

-         return;

-      }

-      if (format == GL_COLOR) {

-         if (!_mesa_is_legal_color_format(ctx, baseFormat)) {

-            att_incomplete("bad renderbuffer color format");

-            att->Complete = GL_FALSE;

-            return;

-         }

-      }

-      else if (format == GL_DEPTH) {

-         if (baseFormat == GL_DEPTH_COMPONENT) {

-            /* OK */

-         }

-         else if (ctx->Extensions.EXT_packed_depth_stencil &&

-                  baseFormat == GL_DEPTH_STENCIL_EXT) {

-            /* OK */

-         }

-         else {

-            att_incomplete("bad renderbuffer depth format");

-            att->Complete = GL_FALSE;

-            return;

-         }

-      }

-      else {

-         assert(format == GL_STENCIL);

-         if (baseFormat == GL_STENCIL_INDEX) {

-            /* OK */

-         }

-         else if (ctx->Extensions.EXT_packed_depth_stencil &&

-                  baseFormat == GL_DEPTH_STENCIL_EXT) {

-            /* OK */

-         }

-         else {

-            att->Complete = GL_FALSE;

-            att_incomplete("bad renderbuffer stencil format");

-            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.

- * Calls the ctx->Driver.ValidateFramebuffer() function to allow the

- * driver to make hardware-specific validation/completeness checks.

- * Also update the framebuffer's Width and Height fields if the

- * framebuffer is complete.

- */

-void

-_mesa_test_framebuffer_completeness(struct gl_context *ctx,

-                                    struct gl_framebuffer *fb)

-{

-   GLuint numImages;

-   GLenum intFormat = GL_NONE; /* color buffers' internal format */

-   GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;

-   GLint numSamples = -1;

-   GLint i;

-   GLuint j;

-

-   assert(fb->Name != 0);

-

-   numImages = 0;

-   fb->Width = 0;

-   fb->Height = 0;

-

-   /* Start at -2 to more easily loop over all attachment points.

-    *  -2: depth buffer

-    *  -1: stencil buffer

-    * >=0: color buffer

-    */

-   for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {

-      struct gl_renderbuffer_attachment *att;

-      GLenum f;

-      gl_format mesaFormat;

-

-      /*

-       * XXX for ARB_fbo, only check color buffers that are named by

-       * GL_READ_BUFFER and GL_DRAW_BUFFERi.

-       */

-

-      /* check for attachment completeness

-       */

-      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;

-            fbo_incomplete("depth attachment incomplete", -1);

-            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;

-            fbo_incomplete("stencil attachment incomplete", -1);

-            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;

-            fbo_incomplete("color attachment incomplete", i);

-            return;

-         }

-      }

-

-      /* get width, height, format of the renderbuffer/texture

-       */

-      if (att->Type == GL_TEXTURE) {

-         const struct gl_texture_image *texImg

-            = att->Texture->Image[att->CubeMapFace][att->TextureLevel];

-         minWidth = MIN2(minWidth, texImg->Width);

-         maxWidth = MAX2(maxWidth, texImg->Width);

-         minHeight = MIN2(minHeight, texImg->Height);

-         maxHeight = MAX2(maxHeight, texImg->Height);

-         f = texImg->_BaseFormat;

-         mesaFormat = texImg->TexFormat;

-         numImages++;

-         if (!_mesa_is_legal_color_format(ctx, f) &&

-             !is_legal_depth_format(ctx, f)) {

-            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;

-            fbo_incomplete("texture attachment incomplete", -1);

-            return;

-         }

-      }

-      else if (att->Type == GL_RENDERBUFFER_EXT) {

-         minWidth = MIN2(minWidth, att->Renderbuffer->Width);

-         maxWidth = MAX2(minWidth, att->Renderbuffer->Width);

-         minHeight = MIN2(minHeight, att->Renderbuffer->Height);

-         maxHeight = MAX2(minHeight, att->Renderbuffer->Height);

-         f = att->Renderbuffer->InternalFormat;

-         mesaFormat = att->Renderbuffer->Format;

-         numImages++;

-      }

-      else {

-         assert(att->Type == GL_NONE);

-         continue;

-      }

-

-      if (numSamples < 0) {

-         /* first buffer */

-         numSamples = att->Renderbuffer->NumSamples;

-      }

-

-      /* check if integer color */

-      fb->_IntegerColor = _mesa_is_format_integer_color(mesaFormat);

-

-      /* Error-check width, height, format, samples

-       */

-      if (numImages == 1) {

-         /* save format, num samples */

-         if (i >= 0) {

-            intFormat = f;

-         }

-      }

-      else {

-         if (!ctx->Extensions.ARB_framebuffer_object) {

-            /* check that width, height, format are same */

-            if (minWidth != maxWidth || minHeight != maxHeight) {

-               fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;

-               fbo_incomplete("width or height mismatch", -1);

-               return;

-            }

-            /* check that all color buffer have same format */

-            if (intFormat != GL_NONE && f != intFormat) {

-               fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;

-               fbo_incomplete("format mismatch", -1);

-               return;

-            }

-         }

-         if (att->Renderbuffer &&

-             att->Renderbuffer->NumSamples != numSamples) {

-            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;

-            fbo_incomplete("inconsistant number of samples", i);

-            return;

-         }            

-

-      }

-   }

-

-#if FEATURE_GL

-   if (ctx->API == API_OPENGL) {

-      /* Check that all DrawBuffers are present */

-      for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {

-	 if (fb->ColorDrawBuffer[j] != GL_NONE) {

-	    const struct gl_renderbuffer_attachment *att

-	       = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);

-	    assert(att);

-	    if (att->Type == GL_NONE) {

-	       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;

-	       fbo_incomplete("missing drawbuffer", j);

-	       return;

-	    }

-	 }

-      }

-

-      /* Check that the ReadBuffer is present */

-      if (fb->ColorReadBuffer != GL_NONE) {

-	 const struct gl_renderbuffer_attachment *att

-	    = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);

-	 assert(att);

-	 if (att->Type == GL_NONE) {

-	    fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;

-            fbo_incomplete("missing readbuffer", -1);

-	    return;

-	 }

-      }

-   }

-#else

-   (void) j;

-#endif

-

-   if (numImages == 0) {

-      fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;

-      fbo_incomplete("no attachments", -1);

-      return;

-   }

-

-   /* Provisionally set status = COMPLETE ... */

-   fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;

-

-   /* ... but the driver may say the FB is incomplete.

-    * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED

-    * if anything.

-    */

-   if (ctx->Driver.ValidateFramebuffer) {

-      ctx->Driver.ValidateFramebuffer(ctx, fb);

-      if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {

-         fbo_incomplete("driver marked FBO as incomplete", -1);

-      }

-   }

-

-   if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {

-      /*

-       * Note that if ARB_framebuffer_object is supported and the attached

-       * renderbuffers/textures are different sizes, the framebuffer

-       * width/height will be set to the smallest width/height.

-       */

-      fb->Width = minWidth;

-      fb->Height = minHeight;

-

-      /* finally, update the visual info for the framebuffer */

-      _mesa_update_framebuffer_visual(ctx, fb);

-   }

-}

-

-

-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 = _mesa_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;

-   GET_CURRENT_CONTEXT(ctx);

-

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   if (target != GL_RENDERBUFFER_EXT) {

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

-      return;

-   }

-

-   /* No need to flush here since the render buffer binding has no

-    * effect on rendering state.

-    */

-

-   if (renderbuffer) {

-      newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);

-      if (newRb == &DummyRenderbuffer) {

-         /* ID was reserved, but no real renderbuffer object made yet */

-         newRb = NULL;

-      }

-      else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {

-         /* All RB IDs must be Gen'd */

-         _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");

-         return;

-      }

-

-      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 = 1; /* referenced by hash table */

-      }

-   }

-   else {

-      newRb = NULL;

-   }

-

-   ASSERT(newRb != &DummyRenderbuffer);

-

-   _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);

-}

-

-

-/**

- * If the given renderbuffer is anywhere attached to the framebuffer, detach

- * the renderbuffer.

- * This is used when a renderbuffer object is deleted.

- * The spec calls for unbinding.

- */

-static void

-detach_renderbuffer(struct gl_context *ctx,

-                    struct gl_framebuffer *fb,

-                    struct gl_renderbuffer *rb)

-{

-   GLuint i;

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

-      if (fb->Attachment[i].Renderbuffer == rb) {

-         _mesa_remove_attachment(ctx, &fb->Attachment[i]);

-      }

-   }

-   invalidate_framebuffer(fb);

-}

-

-

-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 = _mesa_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);

-            }

-

-            if (ctx->DrawBuffer->Name) {

-               detach_renderbuffer(ctx, ctx->DrawBuffer, rb);

-            }

-            if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {

-               detach_renderbuffer(ctx, ctx->ReadBuffer, rb);

-            }

-

-	    /* Remove from hash table immediately, to free the ID.

-             * But the object will not be freed until it's no longer

-             * referenced anywhere else.

-             */

-	    _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);

-

-            if (rb != &DummyRenderbuffer) {

-               /* no longer referenced by hash table */

-               _mesa_reference_renderbuffer(&rb, NULL);

-	    }

-	 }

-      }

-   }

-}

-

-

-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.

- * This is very similar to _mesa_base_tex_format() but the set of valid

- * internal formats is somewhat different.

- *

- * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT

- *  GL_DEPTH_STENCIL_EXT or zero if error.

- *

- * XXX in the future when we support red-only and red-green formats

- * we'll also return GL_RED and GL_RG.

- */

-GLenum

-_mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)

-{

-   switch (internalFormat) {

-   case GL_ALPHA:

-   case GL_ALPHA4:

-   case GL_ALPHA8:

-   case GL_ALPHA12:

-   case GL_ALPHA16:

-      return GL_ALPHA;

-   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:

-   case GL_RGBA16_SNORM:

-   case GL_SRGB8_ALPHA8_EXT:

-   case GL_SRGB8_EXT:

-      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;

-   case GL_DEPTH_STENCIL_EXT:

-   case GL_DEPTH24_STENCIL8_EXT:

-      if (ctx->Extensions.EXT_packed_depth_stencil)

-         return GL_DEPTH_STENCIL_EXT;

-      else

-         return 0;

-   /* XXX add floating point formats eventually */

-   default:

-      return 0;

-   }

-}

-

-

-/** sentinal value, see below */

-#define NO_SAMPLES 1000

-

-

-/**

- * Helper function used by _mesa_RenderbufferStorageEXT() and 

- * _mesa_RenderbufferStorageMultisample().

- * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().

- */

-static void

-renderbuffer_storage(GLenum target, GLenum internalFormat,

-                     GLsizei width, GLsizei height, GLsizei samples)

-{

-   const char *func = samples == NO_SAMPLES ?

-      "glRenderbufferStorage" : "RenderbufferStorageMultisample";

-   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, "%s(target)", func);

-      return;

-   }

-

-   baseFormat = _mesa_base_fbo_format(ctx, internalFormat);

-   if (baseFormat == 0) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);

-      return;

-   }

-

-   if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {

-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);

-      return;

-   }

-

-   if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {

-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);

-      return;

-   }

-

-   if (samples == NO_SAMPLES) {

-      /* NumSamples == 0 indicates non-multisampling */

-      samples = 0;

-   }

-   else if (samples > (GLsizei) ctx->Const.MaxSamples) {

-      /* note: driver may choose to use more samples than what's requested */

-      _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);

-      return;

-   }

-

-   rb = ctx->CurrentRenderbuffer;

-   if (!rb) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);

-      return;

-   }

-

-   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

-

-   if (rb->InternalFormat == internalFormat &&

-       rb->Width == (GLuint) width &&

-       rb->Height == (GLuint) height) {

-      /* no change in allocation needed */

-      return;

-   }

-

-   /* These MUST get set by the AllocStorage func */

-   rb->Format = MESA_FORMAT_NONE;

-   rb->NumSamples = samples;

-

-   /* Now allocate the storage */

-   ASSERT(rb->AllocStorage);

-   if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {

-      /* No error - check/set fields now */

-      assert(rb->Format != MESA_FORMAT_NONE);

-      assert(rb->Width == (GLuint) width);

-      assert(rb->Height == (GLuint) height);

-      rb->InternalFormat = internalFormat;

-      rb->_BaseFormat = baseFormat;

-      assert(rb->_BaseFormat != 0);

-   }

-   else {

-      /* Probably ran out of memory - clear the fields */

-      rb->Width = 0;

-      rb->Height = 0;

-      rb->Format = MESA_FORMAT_NONE;

-      rb->InternalFormat = GL_NONE;

-      rb->_BaseFormat = GL_NONE;

-      rb->NumSamples = 0;

-   }

-

-   /*

-   test_framebuffer_completeness(ctx, fb);

-   */

-   /* XXX if this renderbuffer is attached anywhere, invalidate attachment

-    * points???

-    */

-}

-

-

-#if FEATURE_OES_EGL_image

-void GLAPIENTRY

-_mesa_EGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)

-{

-   struct gl_renderbuffer *rb;

-   GET_CURRENT_CONTEXT(ctx);

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   if (!ctx->Extensions.OES_EGL_image) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glEGLImageTargetRenderbufferStorageOES(unsupported)");

-      return;

-   }

-

-   if (target != GL_RENDERBUFFER) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "EGLImageTargetRenderbufferStorageOES");

-      return;

-   }

-

-   rb = ctx->CurrentRenderbuffer;

-   if (!rb) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "EGLImageTargetRenderbufferStorageOES");

-      return;

-   }

-

-   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

-

-   ctx->Driver.EGLImageTargetRenderbufferStorage(ctx, rb, image);

-}

-#endif

-

-

-/**

- * Helper function for _mesa_GetRenderbufferParameterivEXT() and

- * _mesa_GetFramebufferAttachmentParameterivEXT()

- * We have to be careful to respect the base format.  For example, if a

- * renderbuffer/texture was created with internalFormat=GL_RGB but the

- * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE

- * we need to return zero.

- */

-static GLint

-get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)

-{

-   switch (pname) {

-   case GL_RENDERBUFFER_RED_SIZE_EXT:

-   case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:

-      if (baseFormat == GL_RGB || baseFormat == GL_RGBA ||

-	  baseFormat == GL_RG || baseFormat == GL_RED)

-         return _mesa_get_format_bits(format, pname);

-      else

-         return 0;

-   case GL_RENDERBUFFER_GREEN_SIZE_EXT:

-   case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:

-      if (baseFormat == GL_RGB || baseFormat == GL_RGBA || baseFormat == GL_RG)

-         return _mesa_get_format_bits(format, pname);

-      else

-         return 0;

-   case GL_RENDERBUFFER_BLUE_SIZE_EXT:

-   case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:

-      if (baseFormat == GL_RGB || baseFormat == GL_RGBA)

-         return _mesa_get_format_bits(format, pname);

-      else

-         return 0;

-   case GL_RENDERBUFFER_ALPHA_SIZE_EXT:

-   case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:

-      if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA ||

-	  baseFormat == GL_LUMINANCE_ALPHA)

-         return _mesa_get_format_bits(format, pname);

-      else

-         return 0;

-   case GL_RENDERBUFFER_DEPTH_SIZE_EXT:

-   case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:

-      if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)

-         return _mesa_get_format_bits(format, pname);

-      else

-         return 0;

-   case GL_RENDERBUFFER_STENCIL_SIZE_EXT:

-   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:

-      if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)

-         return _mesa_get_format_bits(format, pname);

-      else

-         return 0;

-   default:

-      return 0;

-   }

-}

-

-

-

-void GLAPIENTRY

-_mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,

-                             GLsizei width, GLsizei height)

-{

-   /* GL_ARB_fbo says calling this function is equivalent to calling

-    * glRenderbufferStorageMultisample() with samples=0.  We pass in

-    * a token value here just for error reporting purposes.

-    */

-   renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);

-}

-

-

-void GLAPIENTRY

-_mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,

-                                     GLenum internalFormat,

-                                     GLsizei width, GLsizei height)

-{

-   renderbuffer_storage(target, internalFormat, width, height, samples);

-}

-

-

-/**

- * OpenGL ES version of glRenderBufferStorage.

- */

-void GLAPIENTRY

-_es_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,

-			   GLsizei width, GLsizei height)

-{

-   switch (internalFormat) {

-   case GL_RGB565:

-      /* XXX this confuses GL_RENDERBUFFER_INTERNAL_FORMAT_OES */

-      /* choose a closest format */

-      internalFormat = GL_RGB5;

-      break;

-   default:

-      break;

-   }

-

-   renderbuffer_storage(target, internalFormat, width, height, 0);

-}

-

-

-void GLAPIENTRY

-_mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)

-{

-   struct gl_renderbuffer *rb;

-   GET_CURRENT_CONTEXT(ctx);

-

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   if (target != GL_RENDERBUFFER_EXT) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glGetRenderbufferParameterivEXT(target)");

-      return;

-   }

-

-   rb = ctx->CurrentRenderbuffer;

-   if (!rb) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glGetRenderbufferParameterivEXT");

-      return;

-   }

-

-   /* No need to flush here since we're just quering state which is

-    * not effected by rendering.

-    */

-

-   switch (pname) {

-   case GL_RENDERBUFFER_WIDTH_EXT:

-      *params = rb->Width;

-      return;

-   case GL_RENDERBUFFER_HEIGHT_EXT:

-      *params = rb->Height;

-      return;

-   case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:

-      *params = rb->InternalFormat;

-      return;

-   case GL_RENDERBUFFER_RED_SIZE_EXT:

-   case GL_RENDERBUFFER_GREEN_SIZE_EXT:

-   case GL_RENDERBUFFER_BLUE_SIZE_EXT:

-   case GL_RENDERBUFFER_ALPHA_SIZE_EXT:

-   case GL_RENDERBUFFER_DEPTH_SIZE_EXT:

-   case GL_RENDERBUFFER_STENCIL_SIZE_EXT:

-      *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);

-      break;

-   case GL_RENDERBUFFER_SAMPLES:

-      if (ctx->Extensions.ARB_framebuffer_object) {

-         *params = rb->NumSamples;

-         break;

-      }

-      /* fallthrough */

-   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 = _mesa_lookup_framebuffer(ctx, framebuffer);

-      if (rb != NULL && rb != &DummyFramebuffer)

-         return GL_TRUE;

-   }

-   return GL_FALSE;

-}

-

-

-/**

- * Check if any of the attachments of the given framebuffer are textures

- * (render to texture).  Call ctx->Driver.RenderTexture() for such

- * attachments.

- */

-static void

-check_begin_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)

-{

-   GLuint i;

-   ASSERT(ctx->Driver.RenderTexture);

-

-   if (fb->Name == 0)

-      return; /* can't render to texture with winsys framebuffers */

-

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

-      struct gl_renderbuffer_attachment *att = fb->Attachment + i;

-      struct gl_texture_object *texObj = att->Texture;

-      if (texObj

-          && texObj->Image[att->CubeMapFace][att->TextureLevel]) {

-         ctx->Driver.RenderTexture(ctx, fb, att);

-      }

-   }

-}

-

-

-/**

- * Examine all the framebuffer's attachments to see if any are textures.

- * If so, call ctx->Driver.FinishRenderTexture() for each texture to

- * notify the device driver that the texture image may have changed.

- */

-static void

-check_end_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)

-{

-   if (fb->Name == 0)

-      return; /* can't render to texture with winsys framebuffers */

-

-   if (ctx->Driver.FinishRenderTexture) {

-      GLuint i;

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

-         struct gl_renderbuffer_attachment *att = fb->Attachment + i;

-         if (att->Texture && att->Renderbuffer) {

-            ctx->Driver.FinishRenderTexture(ctx, att);

-         }

-      }

-   }

-}

-

-

-void GLAPIENTRY

-_mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)

-{

-   struct gl_framebuffer *newDrawFb, *newReadFb;

-   struct gl_framebuffer *oldDrawFb, *oldReadFb;

-   GLboolean bindReadBuf, bindDrawBuf;

-   GET_CURRENT_CONTEXT(ctx);

-

-#ifdef DEBUG

-   if (ctx->Extensions.ARB_framebuffer_object) {

-      ASSERT(ctx->Extensions.EXT_framebuffer_object);

-      ASSERT(ctx->Extensions.EXT_framebuffer_blit);

-   }

-#endif

-

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   if (!ctx->Extensions.EXT_framebuffer_object) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glBindFramebufferEXT(unsupported)");

-      return;

-   }

-

-   switch (target) {

-#if FEATURE_EXT_framebuffer_blit

-   case GL_DRAW_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

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

-         return;

-      }

-      bindDrawBuf = GL_TRUE;

-      bindReadBuf = GL_FALSE;

-      break;

-   case GL_READ_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

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

-         return;

-      }

-      bindDrawBuf = GL_FALSE;

-      bindReadBuf = GL_TRUE;

-      break;

-#endif

-   case GL_FRAMEBUFFER_EXT:

-      bindDrawBuf = GL_TRUE;

-      bindReadBuf = GL_TRUE;

-      break;

-   default:

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

-      return;

-   }

-

-   if (framebuffer) {

-      /* Binding a user-created framebuffer object */

-      newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);

-      if (newDrawFb == &DummyFramebuffer) {

-         /* ID was reserved, but no real framebuffer object made yet */

-         newDrawFb = NULL;

-      }

-      else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {

-         /* All FBO IDs must be Gen'd */

-         _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");

-         return;

-      }

-

-      if (!newDrawFb) {

-	 /* create new framebuffer object */

-	 newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);

-	 if (!newDrawFb) {

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

-	    return;

-	 }

-         _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);

-      }

-      newReadFb = newDrawFb;

-   }

-   else {

-      /* Binding the window system framebuffer (which was originally set

-       * with MakeCurrent).

-       */

-      newDrawFb = ctx->WinSysDrawBuffer;

-      newReadFb = ctx->WinSysReadBuffer;

-   }

-

-   ASSERT(newDrawFb);

-   ASSERT(newDrawFb != &DummyFramebuffer);

-

-   /* save pointers to current/old framebuffers */

-   oldDrawFb = ctx->DrawBuffer;

-   oldReadFb = ctx->ReadBuffer;

-

-   /* check if really changing bindings */

-   if (oldDrawFb == newDrawFb)

-      bindDrawBuf = GL_FALSE;

-   if (oldReadFb == newReadFb)

-      bindReadBuf = GL_FALSE;

-

-   /*

-    * OK, now bind the new Draw/Read framebuffers, if they're changing.

-    *

-    * We also check if we're beginning and/or ending render-to-texture.

-    * When a framebuffer with texture attachments is unbound, call

-    * ctx->Driver.FinishRenderTexture().

-    * When a framebuffer with texture attachments is bound, call

-    * ctx->Driver.RenderTexture().

-    *

-    * Note that if the ReadBuffer has texture attachments we don't consider

-    * that a render-to-texture case.

-    */

-   if (bindReadBuf) {

-      FLUSH_VERTICES(ctx, _NEW_BUFFERS);

-

-      /* check if old readbuffer was render-to-texture */

-      check_end_texture_render(ctx, oldReadFb);

-

-      _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);

-   }

-

-   if (bindDrawBuf) {

-      FLUSH_VERTICES(ctx, _NEW_BUFFERS);

-

-      /* check if old read/draw buffers were render-to-texture */

-      if (!bindReadBuf)

-         check_end_texture_render(ctx, oldReadFb);

-

-      if (oldDrawFb != oldReadFb)

-         check_end_texture_render(ctx, oldDrawFb);

-

-      /* check if newly bound framebuffer has any texture attachments */

-      check_begin_texture_render(ctx, newDrawFb);

-

-      _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);

-   }

-

-   if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {

-      ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, 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 = _mesa_lookup_framebuffer(ctx, framebuffers[i]);

-	 if (fb) {

-            ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);

-

-            /* check if deleting currently bound framebuffer object */

-            if (ctx->Extensions.EXT_framebuffer_blit) {

-               /* separate draw/read binding points */

-               if (fb == ctx->DrawBuffer) {

-                  /* bind default */

-                  ASSERT(fb->RefCount >= 2);

-                  _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);

-               }

-               if (fb == ctx->ReadBuffer) {

-                  /* bind default */

-                  ASSERT(fb->RefCount >= 2);

-                  _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);

-               }

-            }

-            else {

-               /* only one binding point for read/draw buffers */

-               if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {

-                  /* 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.

-                */

-               _mesa_reference_framebuffer(&fb, NULL);

-	    }

-	 }

-      }

-   }

-}

-

-

-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)

-{

-   struct gl_framebuffer *buffer;

-   GET_CURRENT_CONTEXT(ctx);

-

-   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);

-

-   switch (target) {

-#if FEATURE_EXT_framebuffer_blit

-   case GL_DRAW_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

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

-         return 0;

-      }

-      buffer = ctx->DrawBuffer;

-      break;

-   case GL_READ_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

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

-         return 0;

-      }

-      buffer = ctx->ReadBuffer;

-      break;

-#endif

-   case GL_FRAMEBUFFER_EXT:

-      buffer = ctx->DrawBuffer;

-      break;

-   default:

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

-      return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */

-   }

-

-   if (buffer->Name == 0) {

-      /* The window system / default framebuffer is always complete */

-      return GL_FRAMEBUFFER_COMPLETE_EXT;

-   }

-

-   /* No need to flush here */

-

-   if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {

-      _mesa_test_framebuffer_completeness(ctx, buffer);

-   }

-

-   return buffer->_Status;

-}

-

-

-

-/**

- * Common code called by glFramebufferTexture1D/2D/3DEXT().

- */

-static void

-framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target, 

-                    GLenum attachment, GLenum textarget, GLuint texture,

-                    GLint level, GLint zoffset)

-{

-   struct gl_renderbuffer_attachment *att;

-   struct gl_texture_object *texObj = NULL;

-   struct gl_framebuffer *fb;

-   GLboolean error = GL_FALSE;

-

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   switch (target) {

-   case GL_READ_FRAMEBUFFER_EXT:

-      error = !ctx->Extensions.EXT_framebuffer_blit;

-      fb = ctx->ReadBuffer;

-      break;

-   case GL_DRAW_FRAMEBUFFER_EXT:

-      error = !ctx->Extensions.EXT_framebuffer_blit;

-      /* fall-through */

-   case GL_FRAMEBUFFER_EXT:

-      fb = ctx->DrawBuffer;

-      break;

-   default:

-      error = GL_TRUE;

-   }

-

-   if (error) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glFramebufferTexture%sEXT(target=0x%x)", caller, target);

-      return;

-   }

-

-   ASSERT(fb);

-

-   /* check framebuffer binding */

-   if (fb->Name == 0) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glFramebufferTexture%sEXT", caller);

-      return;

-   }

-

-

-   /* The textarget, level, and zoffset parameters are only validated if

-    * texture is non-zero.

-    */

-   if (texture) {

-      GLboolean err = GL_TRUE;

-

-      texObj = _mesa_lookup_texture(ctx, texture);

-      if (texObj != NULL) {

-         if (textarget == 0) {

-            /* XXX what's the purpose of this? */

-            err = (texObj->Target != GL_TEXTURE_3D) &&

-                (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&

-                (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);

-         }

-         else {

-            err = (texObj->Target == GL_TEXTURE_CUBE_MAP)

-                ? !IS_CUBE_FACE(textarget)

-                : (texObj->Target != textarget);

-         }

-      }

-      else {

-         /* can't render to a non-existant texture */

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glFramebufferTexture%sEXT(non existant texture)",

-                     caller);

-         return;

-      }

-

-      if (err) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glFramebufferTexture%sEXT(texture target mismatch)",

-                     caller);

-         return;

-      }

-

-      if (texObj->Target == GL_TEXTURE_3D) {

-         const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);

-         if (zoffset < 0 || zoffset >= maxSize) {

-            _mesa_error(ctx, GL_INVALID_VALUE,

-                        "glFramebufferTexture%sEXT(zoffset)", caller);

-            return;

-         }

-      }

-      else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||

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

-         if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {

-            _mesa_error(ctx, GL_INVALID_VALUE,

-                        "glFramebufferTexture%sEXT(layer)", caller);

-            return;

-         }

-      }

-

-      if ((level < 0) || 

-          (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {

-         _mesa_error(ctx, GL_INVALID_VALUE,

-                     "glFramebufferTexture%sEXT(level)", caller);

-         return;

-      }

-   }

-

-   att = _mesa_get_attachment(ctx, fb, attachment);

-   if (att == NULL) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glFramebufferTexture%sEXT(attachment)", caller);

-      return;

-   }

-

-   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

-

-   _glthread_LOCK_MUTEX(fb->Mutex);

-   if (texObj) {

-      _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,

-                                   level, zoffset);

-      /* Set the render-to-texture flag.  We'll check this flag in

-       * glTexImage() and friends to determine if we need to revalidate

-       * any FBOs that might be rendering into this texture.

-       * This flag never gets cleared since it's non-trivial to determine

-       * when all FBOs might be done rendering to this texture.  That's OK

-       * though since it's uncommon to render to a texture then repeatedly

-       * call glTexImage() to change images in the texture.

-       */

-      texObj->_RenderToTexture = GL_TRUE;

-   }

-   else {

-      _mesa_remove_attachment(ctx, att);

-   }

-

-   invalidate_framebuffer(fb);

-

-   _glthread_UNLOCK_MUTEX(fb->Mutex);

-}

-

-

-

-void GLAPIENTRY

-_mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,

-                              GLenum textarget, GLuint texture, GLint level)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glFramebufferTexture1DEXT(textarget)");

-      return;

-   }

-

-   framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,

-                       level, 0);

-}

-

-

-void GLAPIENTRY

-_mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,

-                              GLenum textarget, GLuint texture, GLint level)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if ((texture != 0) &&

-       (textarget != GL_TEXTURE_2D) &&

-       (textarget != GL_TEXTURE_RECTANGLE_ARB) &&

-       (!IS_CUBE_FACE(textarget))) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);

-      return;

-   }

-

-   framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,

-                       level, 0);

-}

-

-

-void GLAPIENTRY

-_mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,

-                              GLenum textarget, GLuint texture,

-                              GLint level, GLint zoffset)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glFramebufferTexture3DEXT(textarget)");

-      return;

-   }

-

-   framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,

-                       level, zoffset);

-}

-

-

-void GLAPIENTRY

-_mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,

-                                 GLuint texture, GLint level, GLint layer)

-{

-   GET_CURRENT_CONTEXT(ctx);

-

-   framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,

-                       level, layer);

-}

-

-

-void GLAPIENTRY

-_mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,

-                                 GLenum renderbufferTarget,

-                                 GLuint renderbuffer)

-{

-   struct gl_renderbuffer_attachment *att;

-   struct gl_framebuffer *fb;

-   struct gl_renderbuffer *rb;

-   GET_CURRENT_CONTEXT(ctx);

-

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   switch (target) {

-#if FEATURE_EXT_framebuffer_blit

-   case GL_DRAW_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

-         _mesa_error(ctx, GL_INVALID_ENUM,

-                     "glFramebufferRenderbufferEXT(target)");

-         return;

-      }

-      fb = ctx->DrawBuffer;

-      break;

-   case GL_READ_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

-         _mesa_error(ctx, GL_INVALID_ENUM,

-                     "glFramebufferRenderbufferEXT(target)");

-         return;

-      }

-      fb = ctx->ReadBuffer;

-      break;

-#endif

-   case GL_FRAMEBUFFER_EXT:

-      fb = ctx->DrawBuffer;

-      break;

-   default:

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glFramebufferRenderbufferEXT(target)");

-      return;

-   }

-

-   if (renderbufferTarget != GL_RENDERBUFFER_EXT) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glFramebufferRenderbufferEXT(renderbufferTarget)");

-      return;

-   }

-

-   if (fb->Name == 0) {

-      /* Can't attach new renderbuffers to a window system framebuffer */

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");

-      return;

-   }

-

-   att = _mesa_get_attachment(ctx, fb, attachment);

-   if (att == NULL) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glFramebufferRenderbufferEXT(invalid attachment %s)",

-                  _mesa_lookup_enum_by_nr(attachment));

-      return;

-   }

-

-   if (renderbuffer) {

-      rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);

-      if (!rb) {

-	 _mesa_error(ctx, GL_INVALID_OPERATION,

-		     "glFramebufferRenderbufferEXT(non-existant"

-                     " renderbuffer %u)", renderbuffer);

-	 return;

-      }

-      else if (rb == &DummyRenderbuffer) {

-         /* This is what NVIDIA does */

-	 _mesa_error(ctx, GL_INVALID_VALUE,

-		     "glFramebufferRenderbufferEXT(renderbuffer %u)",

-                     renderbuffer);

-	 return;

-      }

-   }

-   else {

-      /* remove renderbuffer attachment */

-      rb = NULL;

-   }

-

-   if (attachment == GL_DEPTH_STENCIL_ATTACHMENT &&

-       rb && rb->Format != MESA_FORMAT_NONE) {

-      /* make sure the renderbuffer is a depth/stencil format */

-      const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);

-      if (baseFormat != GL_DEPTH_STENCIL) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glFramebufferRenderbufferEXT(renderbuffer"

-                     " is not DEPTH_STENCIL format)");

-         return;

-      }

-   }

-

-

-   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

-

-   assert(ctx->Driver.FramebufferRenderbuffer);

-   ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);

-

-   /* Some subsequent GL commands may depend on the framebuffer's visual

-    * after the binding is updated.  Update visual info now.

-    */

-   _mesa_update_framebuffer_visual(ctx, fb);

-}

-

-

-void GLAPIENTRY

-_mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,

-                                             GLenum pname, GLint *params)

-{

-   const struct gl_renderbuffer_attachment *att;

-   struct gl_framebuffer *buffer;

-   GET_CURRENT_CONTEXT(ctx);

-

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-

-   switch (target) {

-#if FEATURE_EXT_framebuffer_blit

-   case GL_DRAW_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

-         _mesa_error(ctx, GL_INVALID_ENUM,

-                     "glGetFramebufferAttachmentParameterivEXT(target)");

-         return;

-      }

-      buffer = ctx->DrawBuffer;

-      break;

-   case GL_READ_FRAMEBUFFER_EXT:

-      if (!ctx->Extensions.EXT_framebuffer_blit) {

-         _mesa_error(ctx, GL_INVALID_ENUM,

-                     "glGetFramebufferAttachmentParameterivEXT(target)");

-         return;

-      }

-      buffer = ctx->ReadBuffer;

-      break;

-#endif

-   case GL_FRAMEBUFFER_EXT:

-      buffer = ctx->DrawBuffer;

-      break;

-   default:

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glGetFramebufferAttachmentParameterivEXT(target)");

-      return;

-   }

-

-   if (buffer->Name == 0) {

-      /* the default / window-system FBO */

-      att = _mesa_get_fb0_attachment(ctx, buffer, attachment);

-   }

-   else {

-      /* user-created framebuffer FBO */

-      att = _mesa_get_attachment(ctx, buffer, attachment);

-   }

-

-   if (att == NULL) {

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glGetFramebufferAttachmentParameterivEXT(attachment)");

-      return;

-   }

-

-   if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {

-      /* the depth and stencil attachments must point to the same buffer */

-      const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;

-      depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);

-      stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);

-      if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"

-                     " attachments differ)");

-         return;

-      }

-   }

-

-   /* No need to flush here */

-

-   switch (pname) {

-   case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:

-      *params = buffer->Name == 0 ? GL_FRAMEBUFFER_DEFAULT : 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 {

-         assert(att->Type == GL_NONE);

-         *params = 0;

-      }

-      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) {

-         if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {

-            *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;

-         }

-         else {

-            *params = 0;

-         }

-      }

-      else {

-	 _mesa_error(ctx, GL_INVALID_ENUM,

-		     "glGetFramebufferAttachmentParameterivEXT(pname)");

-      }

-      return;

-   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:

-      if (att->Type == GL_TEXTURE) {

-         if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {

-            *params = att->Zoffset;

-         }

-         else {

-            *params = 0;

-         }

-      }

-      else {

-	 _mesa_error(ctx, GL_INVALID_ENUM,

-		     "glGetFramebufferAttachmentParameterivEXT(pname)");

-      }

-      return;

-   case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:

-      if (!ctx->Extensions.ARB_framebuffer_object) {

-         _mesa_error(ctx, GL_INVALID_ENUM,

-                     "glGetFramebufferAttachmentParameterivEXT(pname)");

-      }

-      else {

-         *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);

-      }

-      return;

-   case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:

-      if (!ctx->Extensions.ARB_framebuffer_object) {

-         _mesa_error(ctx, GL_INVALID_ENUM,

-                     "glGetFramebufferAttachmentParameterivEXT(pname)");

-         return;

-      }

-      else {

-         gl_format format = att->Renderbuffer->Format;

-         if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {

-            /* special cases */

-            *params = GL_INDEX;

-         }

-         else {

-            *params = _mesa_get_format_datatype(format);

-         }

-      }

-      return;

-   case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:

-   case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:

-   case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:

-   case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:

-   case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:

-   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:

-      if (!ctx->Extensions.ARB_framebuffer_object) {

-         _mesa_error(ctx, GL_INVALID_ENUM,

-                     "glGetFramebufferAttachmentParameterivEXT(pname)");

-      }

-      else if (att->Texture) {

-         const struct gl_texture_image *texImage =

-            _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,

-                                   att->TextureLevel);

-         if (texImage) {

-            *params = get_component_bits(pname, texImage->_BaseFormat,

-                                         texImage->TexFormat);

-         }

-         else {

-            *params = 0;

-         }

-      }

-      else if (att->Renderbuffer) {

-         *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,

-                                      att->Renderbuffer->Format);

-      }

-      else {

-         *params = 0;

-      }

-      return;

-   default:

-      _mesa_error(ctx, GL_INVALID_ENUM,

-                  "glGetFramebufferAttachmentParameterivEXT(pname)");

-      return;

-   }

-}

-

-

-void GLAPIENTRY

-_mesa_GenerateMipmapEXT(GLenum target)

-{

-   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:

-      /* XXX need to implement GL_TEXTURE_1D_ARRAY and GL_TEXTURE_2D_ARRAY */

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

-      return;

-   }

-

-   texObj = _mesa_get_current_tex_object(ctx, target);

-

-   if (texObj->BaseLevel >= texObj->MaxLevel) {

-      /* nothing to do */

-      return;

-   }

-

-   if (texObj->Target == GL_TEXTURE_CUBE_MAP &&

-       !_mesa_cube_complete(texObj)) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glGenerateMipmap(incomplete cube map)");

-      return;

-   }

-

-   _mesa_lock_texture(ctx, texObj);

-   if (target == GL_TEXTURE_CUBE_MAP) {

-      GLuint face;

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

-	 ctx->Driver.GenerateMipmap(ctx,

-				    GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,

-				    texObj);

-   }

-   else {

-      ctx->Driver.GenerateMipmap(ctx, target, texObj);

-   }

-   _mesa_unlock_texture(ctx, texObj);

-}

-

-

-#if FEATURE_EXT_framebuffer_blit

-

-static const struct gl_renderbuffer_attachment *

-find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)

-{

-   GLuint i;

-   for (i = 0; i < Elements(fb->Attachment); i++) {

-      if (fb->Attachment[i].Renderbuffer == rb)

-         return &fb->Attachment[i];

-   }

-   return NULL;

-}

-

-

-

-/**

- * Blit rectangular region, optionally from one framebuffer to another.

- *

- * Note, if the src buffer is multisampled and the dest is not, this is

- * when the samples must be resolved to a single color.

- */

-void GLAPIENTRY

-_mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,

-                         GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,

-                         GLbitfield mask, GLenum filter)

-{

-   const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |

-                                     GL_DEPTH_BUFFER_BIT |

-                                     GL_STENCIL_BUFFER_BIT);

-   const struct gl_framebuffer *readFb, *drawFb;

-   const struct gl_renderbuffer *colorReadRb, *colorDrawRb;

-   GET_CURRENT_CONTEXT(ctx);

-

-   ASSERT_OUTSIDE_BEGIN_END(ctx);

-   FLUSH_VERTICES(ctx, _NEW_BUFFERS);

-

-   if (ctx->NewState) {

-      _mesa_update_state(ctx);

-   }

-

-   readFb = ctx->ReadBuffer;

-   drawFb = ctx->DrawBuffer;

-

-   if (!readFb || !drawFb) {

-      /* This will normally never happen but someday we may want to

-       * support MakeCurrent() with no drawables.

-       */

-      return;

-   }

-

-   /* check for complete framebuffers */

-   if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||

-       readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {

-      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,

-                  "glBlitFramebufferEXT(incomplete draw/read buffers)");

-      return;

-   }

-

-   if (filter != GL_NEAREST && filter != GL_LINEAR) {

-      _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");

-      return;

-   }

-

-   if (mask & ~legalMaskBits) {

-      _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");

-      return;

-   }

-

-   /* depth/stencil must be blitted with nearest filtering */

-   if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))

-        && filter != GL_NEAREST) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-             "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");

-      return;

-   }

-

-   /* get color read/draw renderbuffers */

-   if (mask & GL_COLOR_BUFFER_BIT) {

-      colorReadRb = readFb->_ColorReadBuffer;

-      colorDrawRb = drawFb->_ColorDrawBuffers[0];

-   }

-   else {

-      colorReadRb = colorDrawRb = NULL;

-   }

-

-   if (mask & GL_STENCIL_BUFFER_BIT) {

-      struct gl_renderbuffer *readRb = readFb->_StencilBuffer;

-      struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;

-      if (!readRb ||

-          !drawRb ||

-          _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) != 

-          _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glBlitFramebufferEXT(stencil buffer size mismatch");

-         return;

-      }

-   }

-

-   if (mask & GL_DEPTH_BUFFER_BIT) {

-      struct gl_renderbuffer *readRb = readFb->_DepthBuffer;

-      struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;

-      if (!readRb ||

-          !drawRb ||

-          _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) != 

-          _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                     "glBlitFramebufferEXT(depth buffer size mismatch");

-         return;

-      }

-   }

-

-   if (readFb->Visual.samples > 0 &&

-       drawFb->Visual.samples > 0 &&

-       readFb->Visual.samples != drawFb->Visual.samples) {

-      _mesa_error(ctx, GL_INVALID_OPERATION,

-                  "glBlitFramebufferEXT(mismatched samples");

-      return;

-   }

-

-   /* extra checks for multisample copies... */

-   if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {

-      /* src and dest region sizes must be the same */

-      if (srcX1 - srcX0 != dstX1 - dstX0 ||

-          srcY1 - srcY0 != dstY1 - dstY0) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                "glBlitFramebufferEXT(bad src/dst multisample region sizes");

-         return;

-      }

-

-      /* color formats must match */

-      if (colorReadRb &&

-          colorDrawRb &&

-          colorReadRb->Format != colorDrawRb->Format) {

-         _mesa_error(ctx, GL_INVALID_OPERATION,

-                "glBlitFramebufferEXT(bad src/dst multisample pixel formats");

-         return;

-      }

-   }

-

-   if (!ctx->Extensions.EXT_framebuffer_blit) {

-      _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");

-      return;

-   }

-

-   /* Debug code */

-   if (DEBUG_BLIT) {

-      printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"

-	     " 0x%x, 0x%x)\n",

-	     srcX0, srcY0, srcX1, srcY1,

-	     dstX0, dstY0, dstX1, dstY1,

-	     mask, filter);

-      if (colorReadRb) {

-         const struct gl_renderbuffer_attachment *att;

-

-         att = find_attachment(readFb, colorReadRb);

-         printf("  Src FBO %u  RB %u (%dx%d)  ",

-		readFb->Name, colorReadRb->Name,

-		colorReadRb->Width, colorReadRb->Height);

-         if (att && att->Texture) {

-            printf("Tex %u  tgt 0x%x  level %u  face %u",

-		   att->Texture->Name,

-		   att->Texture->Target,

-		   att->TextureLevel,

-		   att->CubeMapFace);

-         }

-         printf("\n");

-

-         att = find_attachment(drawFb, colorDrawRb);

-         printf("  Dst FBO %u  RB %u (%dx%d)  ",

-		drawFb->Name, colorDrawRb->Name,

-		colorDrawRb->Width, colorDrawRb->Height);

-         if (att && att->Texture) {

-            printf("Tex %u  tgt 0x%x  level %u  face %u",

-		   att->Texture->Name,

-		   att->Texture->Target,

-		   att->TextureLevel,

-		   att->CubeMapFace);

-         }

-         printf("\n");

-      }

-   }

-

-   ASSERT(ctx->Driver.BlitFramebuffer);

-   ctx->Driver.BlitFramebuffer(ctx,

-                               srcX0, srcY0, srcX1, srcY1,

-                               dstX0, dstY0, dstX1, dstY1,

-                               mask, filter);

-}

-#endif /* FEATURE_EXT_framebuffer_blit */

-

-#if FEATURE_ARB_geometry_shader4

-void GLAPIENTRY

-_mesa_FramebufferTextureARB(GLenum target, GLenum attachment,

-                            GLuint texture, GLint level)

-{

-   GET_CURRENT_CONTEXT(ctx);

-   _mesa_error(ctx, GL_INVALID_OPERATION,

-               "glFramebufferTextureARB "

-               "not implemented!");

-}

-

-void GLAPIENTRY

-_mesa_FramebufferTextureFaceARB(GLenum target, GLenum attachment,

-                                GLuint texture, GLint level, GLenum face)

-{

-   GET_CURRENT_CONTEXT(ctx);

-   _mesa_error(ctx, GL_INVALID_OPERATION,

-               "glFramebufferTextureFaceARB "

-               "not implemented!");

-}

-#endif /* FEATURE_ARB_geometry_shader4 */

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2009  VMware, Inc.  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.
+ */
+
+
+/*
+ * GL_EXT/ARB_framebuffer_object extensions
+ *
+ * Authors:
+ *   Brian Paul
+ */
+
+
+#include "buffers.h"
+#include "context.h"
+#include "enums.h"
+#include "fbobject.h"
+#include "formats.h"
+#include "framebuffer.h"
+#include "hash.h"
+#include "macros.h"
+#include "mfeatures.h"
+#include "mtypes.h"
+#include "renderbuffer.h"
+#include "state.h"
+#include "teximage.h"
+#include "texobj.h"
+
+
+/** Set this to 1 to help debug FBO incompleteness problems */
+#define DEBUG_FBO 0
+
+/** Set this to 1 to debug/log glBlitFramebuffer() calls */
+#define DEBUG_BLIT 0
+
+
+/**
+ * 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;
+
+/* We bind this framebuffer when applications pass a NULL
+ * drawable/surface in make current. */
+static struct gl_framebuffer IncompleteFramebuffer;
+
+
+#define IS_CUBE_FACE(TARGET) \
+   ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
+    (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
+
+
+static void
+delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
+{
+   /* no op */
+}
+
+static void
+delete_dummy_framebuffer(struct gl_framebuffer *fb)
+{
+   /* no op */
+}
+
+
+void
+_mesa_init_fbobjects(struct gl_context *ctx)
+{
+   _glthread_INIT_MUTEX(DummyFramebuffer.Mutex);
+   _glthread_INIT_MUTEX(DummyRenderbuffer.Mutex);
+   _glthread_INIT_MUTEX(IncompleteFramebuffer.Mutex);
+   DummyFramebuffer.Delete = delete_dummy_framebuffer;
+   DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
+   IncompleteFramebuffer.Delete = delete_dummy_framebuffer;
+}
+
+struct gl_framebuffer *
+_mesa_get_incomplete_framebuffer(void)
+{
+   return &IncompleteFramebuffer;
+}
+
+/**
+ * Helper routine for getting a gl_renderbuffer.
+ */
+struct gl_renderbuffer *
+_mesa_lookup_renderbuffer(struct gl_context *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.
+ */
+struct gl_framebuffer *
+_mesa_lookup_framebuffer(struct gl_context *ctx, GLuint id)
+{
+   struct gl_framebuffer *fb;
+
+   if (id == 0)
+      return NULL;
+
+   fb = (struct gl_framebuffer *)
+      _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
+   return fb;
+}
+
+
+/**
+ * Mark the given framebuffer as invalid.  This will force the
+ * test for framebuffer completeness to be done before the framebuffer
+ * is used.
+ */
+static void
+invalidate_framebuffer(struct gl_framebuffer *fb)
+{
+   fb->_Status = 0; /* "indeterminate" */
+}
+
+
+/**
+ * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
+ * gl_renderbuffer_attachment object.
+ * This function is only used for user-created FB objects, not the
+ * default / window-system FB object.
+ * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to
+ * the depth buffer attachment point.
+ */
+struct gl_renderbuffer_attachment *
+_mesa_get_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
+                     GLenum attachment)
+{
+   GLuint i;
+
+   assert(fb->Name > 0);
+
+   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_STENCIL_ATTACHMENT:
+      /* fall-through */
+   case GL_DEPTH_BUFFER:
+      /* fall-through / new in GL 3.0 */
+   case GL_DEPTH_ATTACHMENT_EXT:
+      return &fb->Attachment[BUFFER_DEPTH];
+   case GL_STENCIL_BUFFER:
+      /* fall-through / new in GL 3.0 */
+   case GL_STENCIL_ATTACHMENT_EXT:
+      return &fb->Attachment[BUFFER_STENCIL];
+   default:
+      return NULL;
+   }
+}
+
+
+/**
+ * As above, but only used for getting attachments of the default /
+ * window-system framebuffer (not user-created framebuffer objects).
+ */
+static struct gl_renderbuffer_attachment *
+_mesa_get_fb0_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
+                         GLenum attachment)
+{
+   assert(fb->Name == 0);
+
+   switch (attachment) {
+   case GL_FRONT_LEFT:
+      return &fb->Attachment[BUFFER_FRONT_LEFT];
+   case GL_FRONT_RIGHT:
+      return &fb->Attachment[BUFFER_FRONT_RIGHT];
+   case GL_BACK_LEFT:
+      return &fb->Attachment[BUFFER_BACK_LEFT];
+   case GL_BACK_RIGHT:
+      return &fb->Attachment[BUFFER_BACK_RIGHT];
+   case GL_AUX0:
+      if (fb->Visual.numAuxBuffers == 1) {
+         return &fb->Attachment[BUFFER_AUX0];
+      }
+      return NULL;
+   case GL_DEPTH_BUFFER:
+      /* fall-through / new in GL 3.0 */
+   case GL_DEPTH_ATTACHMENT_EXT:
+      return &fb->Attachment[BUFFER_DEPTH];
+   case GL_STENCIL_BUFFER:
+      /* fall-through / new in GL 3.0 */
+   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(struct gl_context *ctx,
+                        struct gl_renderbuffer_attachment *att)
+{
+   if (att->Type == GL_TEXTURE) {
+      ASSERT(att->Texture);
+      if (ctx->Driver.FinishRenderTexture) {
+         /* tell driver that we're done rendering to this texture. */
+         ctx->Driver.FinishRenderTexture(ctx, att);
+      }
+      _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
+      ASSERT(!att->Texture);
+   }
+   if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
+      ASSERT(!att->Texture);
+      _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
+      ASSERT(!att->Renderbuffer);
+   }
+   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(struct gl_context *ctx,
+                             struct gl_framebuffer *fb,
+                             struct gl_renderbuffer_attachment *att,
+                             struct gl_texture_object *texObj,
+                             GLenum texTarget, GLuint level, GLuint zoffset)
+{
+   if (att->Texture == texObj) {
+      /* re-attaching same texture */
+      ASSERT(att->Type == GL_TEXTURE);
+      if (ctx->Driver.FinishRenderTexture)
+	 ctx->Driver.FinishRenderTexture(ctx, att);
+   }
+   else {
+      /* new attachment */
+      if (ctx->Driver.FinishRenderTexture && att->Texture)
+	 ctx->Driver.FinishRenderTexture(ctx, att);
+      _mesa_remove_attachment(ctx, att);
+      att->Type = GL_TEXTURE;
+      assert(!att->Texture);
+      _mesa_reference_texobj(&att->Texture, texObj);
+   }
+
+   /* always update these fields */
+   att->TextureLevel = level;
+   att->CubeMapFace = _mesa_tex_target_to_face(texTarget);
+   att->Zoffset = zoffset;
+   att->Complete = GL_FALSE;
+
+   if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
+      ctx->Driver.RenderTexture(ctx, fb, att);
+   }
+
+   invalidate_framebuffer(fb);
+}
+
+
+/**
+ * Bind a renderbuffer to an attachment point.
+ * The previous binding, if any, will be removed first.
+ */
+void
+_mesa_set_renderbuffer_attachment(struct gl_context *ctx,
+                                  struct gl_renderbuffer_attachment *att,
+                                  struct gl_renderbuffer *rb)
+{
+   /* XXX check if re-doing same attachment, exit early */
+   _mesa_remove_attachment(ctx, att);
+   att->Type = GL_RENDERBUFFER_EXT;
+   att->Texture = NULL; /* just to be safe */
+   att->Complete = GL_FALSE;
+   _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
+}
+
+
+/**
+ * Fallback for ctx->Driver.FramebufferRenderbuffer()
+ * Attach a renderbuffer object to a framebuffer object.
+ */
+void
+_mesa_framebuffer_renderbuffer(struct gl_context *ctx,
+                               struct gl_framebuffer *fb,
+                               GLenum attachment, struct gl_renderbuffer *rb)
+{
+   struct gl_renderbuffer_attachment *att;
+
+   _glthread_LOCK_MUTEX(fb->Mutex);
+
+   att = _mesa_get_attachment(ctx, fb, attachment);
+   ASSERT(att);
+   if (rb) {
+      _mesa_set_renderbuffer_attachment(ctx, att, rb);
+      if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
+         /* do stencil attachment here (depth already done above) */
+         att = _mesa_get_attachment(ctx, fb, GL_STENCIL_ATTACHMENT_EXT);
+         assert(att);
+         _mesa_set_renderbuffer_attachment(ctx, att, rb);
+      }
+   }
+   else {
+      _mesa_remove_attachment(ctx, att);
+   }
+
+   invalidate_framebuffer(fb);
+
+   _glthread_UNLOCK_MUTEX(fb->Mutex);
+}
+
+
+/**
+ * For debug only.
+ */
+static void
+att_incomplete(const char *msg)
+{
+#if DEBUG_FBO
+   _mesa_debug(NULL, "attachment incomplete: %s\n", msg);
+#else
+   (void) msg;
+#endif
+}
+
+
+/**
+ * For debug only.
+ */
+static void
+fbo_incomplete(const char *msg, int index)
+{
+#if DEBUG_FBO
+   _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);
+#else
+   (void) msg;
+   (void) index;
+#endif
+}
+
+
+/**
+ * Is the given base format a legal format for a color renderbuffer?
+ */
+GLboolean
+_mesa_is_legal_color_format(const struct gl_context *ctx, GLenum baseFormat)
+{
+   switch (baseFormat) {
+   case GL_RGB:
+   case GL_RGBA:
+      return GL_TRUE;
+   case GL_LUMINANCE:
+   case GL_LUMINANCE_ALPHA:
+   case GL_INTENSITY:
+   case GL_ALPHA:
+      return ctx->Extensions.ARB_framebuffer_object;
+   case GL_RED:
+   case GL_RG:
+      return ctx->Extensions.ARB_texture_rg;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * Is the given base format a legal format for a depth/stencil renderbuffer?
+ */
+static GLboolean
+is_legal_depth_format(const struct gl_context *ctx, GLenum baseFormat)
+{
+   switch (baseFormat) {
+   case GL_DEPTH_COMPONENT:
+   case GL_DEPTH_STENCIL_EXT:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
+/**
+ * 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 struct gl_context *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;
+      GLenum baseFormat;
+
+      if (!texObj) {
+         att_incomplete("no texobj");
+         att->Complete = GL_FALSE;
+         return;
+      }
+
+      texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];
+      if (!texImage) {
+         att_incomplete("no teximage");
+         att->Complete = GL_FALSE;
+         return;
+      }
+      if (texImage->Width < 1 || texImage->Height < 1) {
+         att_incomplete("teximage width/height=0");
+         printf("texobj = %u\n", texObj->Name);
+         printf("level = %d\n", att->TextureLevel);
+         att->Complete = GL_FALSE;
+         return;
+      }
+      if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {
+         att_incomplete("bad z offset");
+         att->Complete = GL_FALSE;
+         return;
+      }
+
+      baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
+
+      if (format == GL_COLOR) {
+         if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
+            att_incomplete("bad format");
+            att->Complete = GL_FALSE;
+            return;
+         }
+         if (_mesa_is_format_compressed(texImage->TexFormat)) {
+            att_incomplete("compressed internalformat");
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+      else if (format == GL_DEPTH) {
+         if (baseFormat == GL_DEPTH_COMPONENT) {
+            /* OK */
+         }
+         else if (ctx->Extensions.EXT_packed_depth_stencil &&
+                  ctx->Extensions.ARB_depth_texture &&
+                  baseFormat == GL_DEPTH_STENCIL_EXT) {
+            /* OK */
+         }
+         else {
+            att->Complete = GL_FALSE;
+            att_incomplete("bad depth format");
+            return;
+         }
+      }
+      else {
+         ASSERT(format == GL_STENCIL);
+         if (ctx->Extensions.EXT_packed_depth_stencil &&
+             ctx->Extensions.ARB_depth_texture &&
+             baseFormat == GL_DEPTH_STENCIL_EXT) {
+            /* OK */
+         }
+         else {
+            /* no such thing as stencil-only textures */
+            att_incomplete("illegal stencil texture");
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+   }
+   else if (att->Type == GL_RENDERBUFFER_EXT) {
+      const GLenum baseFormat =
+         _mesa_get_format_base_format(att->Renderbuffer->Format);
+
+      ASSERT(att->Renderbuffer);
+      if (!att->Renderbuffer->InternalFormat ||
+          att->Renderbuffer->Width < 1 ||
+          att->Renderbuffer->Height < 1) {
+         att_incomplete("0x0 renderbuffer");
+         att->Complete = GL_FALSE;
+         return;
+      }
+      if (format == GL_COLOR) {
+         if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
+            att_incomplete("bad renderbuffer color format");
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+      else if (format == GL_DEPTH) {
+         if (baseFormat == GL_DEPTH_COMPONENT) {
+            /* OK */
+         }
+         else if (ctx->Extensions.EXT_packed_depth_stencil &&
+                  baseFormat == GL_DEPTH_STENCIL_EXT) {
+            /* OK */
+         }
+         else {
+            att_incomplete("bad renderbuffer depth format");
+            att->Complete = GL_FALSE;
+            return;
+         }
+      }
+      else {
+         assert(format == GL_STENCIL);
+         if (baseFormat == GL_STENCIL_INDEX) {
+            /* OK */
+         }
+         else if (ctx->Extensions.EXT_packed_depth_stencil &&
+                  baseFormat == GL_DEPTH_STENCIL_EXT) {
+            /* OK */
+         }
+         else {
+            att->Complete = GL_FALSE;
+            att_incomplete("bad renderbuffer stencil format");
+            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.
+ * Calls the ctx->Driver.ValidateFramebuffer() function to allow the
+ * driver to make hardware-specific validation/completeness checks.
+ * Also update the framebuffer's Width and Height fields if the
+ * framebuffer is complete.
+ */
+void
+_mesa_test_framebuffer_completeness(struct gl_context *ctx,
+                                    struct gl_framebuffer *fb)
+{
+   GLuint numImages;
+   GLenum intFormat = GL_NONE; /* color buffers' internal format */
+   GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;
+   GLint numSamples = -1;
+   GLint i;
+   GLuint j;
+
+   assert(fb->Name != 0);
+
+   numImages = 0;
+   fb->Width = 0;
+   fb->Height = 0;
+
+   /* Start at -2 to more easily loop over all attachment points.
+    *  -2: depth buffer
+    *  -1: stencil buffer
+    * >=0: color buffer
+    */
+   for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
+      struct gl_renderbuffer_attachment *att;
+      GLenum f;
+      gl_format mesaFormat;
+
+      /*
+       * XXX for ARB_fbo, only check color buffers that are named by
+       * GL_READ_BUFFER and GL_DRAW_BUFFERi.
+       */
+
+      /* check for attachment completeness
+       */
+      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;
+            fbo_incomplete("depth attachment incomplete", -1);
+            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;
+            fbo_incomplete("stencil attachment incomplete", -1);
+            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;
+            fbo_incomplete("color attachment incomplete", i);
+            return;
+         }
+      }
+
+      /* get width, height, format of the renderbuffer/texture
+       */
+      if (att->Type == GL_TEXTURE) {
+         const struct gl_texture_image *texImg
+            = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
+         minWidth = MIN2(minWidth, texImg->Width);
+         maxWidth = MAX2(maxWidth, texImg->Width);
+         minHeight = MIN2(minHeight, texImg->Height);
+         maxHeight = MAX2(maxHeight, texImg->Height);
+         f = texImg->_BaseFormat;
+         mesaFormat = texImg->TexFormat;
+         numImages++;
+         if (!_mesa_is_legal_color_format(ctx, f) &&
+             !is_legal_depth_format(ctx, f)) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
+            fbo_incomplete("texture attachment incomplete", -1);
+            return;
+         }
+      }
+      else if (att->Type == GL_RENDERBUFFER_EXT) {
+         minWidth = MIN2(minWidth, att->Renderbuffer->Width);
+         maxWidth = MAX2(minWidth, att->Renderbuffer->Width);
+         minHeight = MIN2(minHeight, att->Renderbuffer->Height);
+         maxHeight = MAX2(minHeight, att->Renderbuffer->Height);
+         f = att->Renderbuffer->InternalFormat;
+         mesaFormat = att->Renderbuffer->Format;
+         numImages++;
+      }
+      else {
+         assert(att->Type == GL_NONE);
+         continue;
+      }
+
+      if (numSamples < 0) {
+         /* first buffer */
+         numSamples = att->Renderbuffer->NumSamples;
+      }
+
+      /* check if integer color */
+      fb->_IntegerColor = _mesa_is_format_integer_color(mesaFormat);
+
+      /* Error-check width, height, format, samples
+       */
+      if (numImages == 1) {
+         /* save format, num samples */
+         if (i >= 0) {
+            intFormat = f;
+         }
+      }
+      else {
+         if (!ctx->Extensions.ARB_framebuffer_object) {
+            /* check that width, height, format are same */
+            if (minWidth != maxWidth || minHeight != maxHeight) {
+               fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
+               fbo_incomplete("width or height mismatch", -1);
+               return;
+            }
+            /* check that all color buffer have same format */
+            if (intFormat != GL_NONE && f != intFormat) {
+               fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
+               fbo_incomplete("format mismatch", -1);
+               return;
+            }
+         }
+         if (att->Renderbuffer &&
+             att->Renderbuffer->NumSamples != numSamples) {
+            fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;
+            fbo_incomplete("inconsistant number of samples", i);
+            return;
+         }            
+
+      }
+   }
+
+#if FEATURE_GL
+   if (ctx->API == API_OPENGL) {
+      /* Check that all DrawBuffers are present */
+      for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
+	 if (fb->ColorDrawBuffer[j] != GL_NONE) {
+	    const struct gl_renderbuffer_attachment *att
+	       = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
+	    assert(att);
+	    if (att->Type == GL_NONE) {
+	       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
+	       fbo_incomplete("missing drawbuffer", j);
+	       return;
+	    }
+	 }
+      }
+
+      /* Check that the ReadBuffer is present */
+      if (fb->ColorReadBuffer != GL_NONE) {
+	 const struct gl_renderbuffer_attachment *att
+	    = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
+	 assert(att);
+	 if (att->Type == GL_NONE) {
+	    fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
+            fbo_incomplete("missing readbuffer", -1);
+	    return;
+	 }
+      }
+   }
+#else
+   (void) j;
+#endif
+
+   if (numImages == 0) {
+      fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
+      fbo_incomplete("no attachments", -1);
+      return;
+   }
+
+   /* Provisionally set status = COMPLETE ... */
+   fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
+
+   /* ... but the driver may say the FB is incomplete.
+    * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
+    * if anything.
+    */
+   if (ctx->Driver.ValidateFramebuffer) {
+      ctx->Driver.ValidateFramebuffer(ctx, fb);
+      if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+         fbo_incomplete("driver marked FBO as incomplete", -1);
+      }
+   }
+
+   if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
+      /*
+       * Note that if ARB_framebuffer_object is supported and the attached
+       * renderbuffers/textures are different sizes, the framebuffer
+       * width/height will be set to the smallest width/height.
+       */
+      fb->Width = minWidth;
+      fb->Height = minHeight;
+
+      /* finally, update the visual info for the framebuffer */
+      _mesa_update_framebuffer_visual(ctx, fb);
+   }
+}
+
+
+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 = _mesa_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;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_RENDERBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindRenderbufferEXT(target)");
+      return;
+   }
+
+   /* No need to flush here since the render buffer binding has no
+    * effect on rendering state.
+    */
+
+   if (renderbuffer) {
+      newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
+      if (newRb == &DummyRenderbuffer) {
+         /* ID was reserved, but no real renderbuffer object made yet */
+         newRb = NULL;
+      }
+      else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
+         /* All RB IDs must be Gen'd */
+         _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
+         return;
+      }
+
+      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 = 1; /* referenced by hash table */
+      }
+   }
+   else {
+      newRb = NULL;
+   }
+
+   ASSERT(newRb != &DummyRenderbuffer);
+
+   _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
+}
+
+
+/**
+ * If the given renderbuffer is anywhere attached to the framebuffer, detach
+ * the renderbuffer.
+ * This is used when a renderbuffer object is deleted.
+ * The spec calls for unbinding.
+ */
+static void
+detach_renderbuffer(struct gl_context *ctx,
+                    struct gl_framebuffer *fb,
+                    struct gl_renderbuffer *rb)
+{
+   GLuint i;
+   for (i = 0; i < BUFFER_COUNT; i++) {
+      if (fb->Attachment[i].Renderbuffer == rb) {
+         _mesa_remove_attachment(ctx, &fb->Attachment[i]);
+      }
+   }
+   invalidate_framebuffer(fb);
+}
+
+
+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 = _mesa_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);
+            }
+
+            if (ctx->DrawBuffer->Name) {
+               detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
+            }
+            if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
+               detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
+            }
+
+	    /* Remove from hash table immediately, to free the ID.
+             * But the object will not be freed until it's no longer
+             * referenced anywhere else.
+             */
+	    _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
+
+            if (rb != &DummyRenderbuffer) {
+               /* no longer referenced by hash table */
+               _mesa_reference_renderbuffer(&rb, NULL);
+	    }
+	 }
+      }
+   }
+}
+
+
+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.
+ * This is very similar to _mesa_base_tex_format() but the set of valid
+ * internal formats is somewhat different.
+ *
+ * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
+ *  GL_DEPTH_STENCIL_EXT or zero if error.
+ *
+ * XXX in the future when we support red-only and red-green formats
+ * we'll also return GL_RED and GL_RG.
+ */
+GLenum
+_mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
+{
+   switch (internalFormat) {
+   case GL_ALPHA:
+   case GL_ALPHA4:
+   case GL_ALPHA8:
+   case GL_ALPHA12:
+   case GL_ALPHA16:
+      return GL_ALPHA;
+   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:
+   case GL_SRGB8_EXT:
+      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:
+   case GL_RGBA16_SNORM:
+   case GL_SRGB8_ALPHA8_EXT:
+      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;
+   case GL_DEPTH_STENCIL_EXT:
+   case GL_DEPTH24_STENCIL8_EXT:
+      if (ctx->Extensions.EXT_packed_depth_stencil)
+         return GL_DEPTH_STENCIL_EXT;
+      else
+         return 0;
+   /* XXX add floating point formats eventually */
+   default:
+      return 0;
+   }
+}
+
+
+/** sentinal value, see below */
+#define NO_SAMPLES 1000
+
+
+/**
+ * Helper function used by _mesa_RenderbufferStorageEXT() and 
+ * _mesa_RenderbufferStorageMultisample().
+ * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
+ */
+static void
+renderbuffer_storage(GLenum target, GLenum internalFormat,
+                     GLsizei width, GLsizei height, GLsizei samples)
+{
+   const char *func = samples == NO_SAMPLES ?
+      "glRenderbufferStorage" : "RenderbufferStorageMultisample";
+   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, "%s(target)", func);
+      return;
+   }
+
+   baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
+   if (baseFormat == 0) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
+      return;
+   }
+
+   if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
+      return;
+   }
+
+   if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
+      return;
+   }
+
+   if (samples == NO_SAMPLES) {
+      /* NumSamples == 0 indicates non-multisampling */
+      samples = 0;
+   }
+   else if (samples > (GLsizei) ctx->Const.MaxSamples) {
+      /* note: driver may choose to use more samples than what's requested */
+      _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
+      return;
+   }
+
+   rb = ctx->CurrentRenderbuffer;
+   if (!rb) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   if (rb->InternalFormat == internalFormat &&
+       rb->Width == (GLuint) width &&
+       rb->Height == (GLuint) height) {
+      /* no change in allocation needed */
+      return;
+   }
+
+   /* These MUST get set by the AllocStorage func */
+   rb->Format = MESA_FORMAT_NONE;
+   rb->NumSamples = samples;
+
+   /* Now allocate the storage */
+   ASSERT(rb->AllocStorage);
+   if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
+      /* No error - check/set fields now */
+      assert(rb->Format != MESA_FORMAT_NONE);
+      assert(rb->Width == (GLuint) width);
+      assert(rb->Height == (GLuint) height);
+      rb->InternalFormat = internalFormat;
+      rb->_BaseFormat = baseFormat;
+      assert(rb->_BaseFormat != 0);
+   }
+   else {
+      /* Probably ran out of memory - clear the fields */
+      rb->Width = 0;
+      rb->Height = 0;
+      rb->Format = MESA_FORMAT_NONE;
+      rb->InternalFormat = GL_NONE;
+      rb->_BaseFormat = GL_NONE;
+      rb->NumSamples = 0;
+   }
+
+   /*
+   test_framebuffer_completeness(ctx, fb);
+   */
+   /* XXX if this renderbuffer is attached anywhere, invalidate attachment
+    * points???
+    */
+}
+
+
+#if FEATURE_OES_EGL_image
+void GLAPIENTRY
+_mesa_EGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)
+{
+   struct gl_renderbuffer *rb;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (!ctx->Extensions.OES_EGL_image) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glEGLImageTargetRenderbufferStorageOES(unsupported)");
+      return;
+   }
+
+   if (target != GL_RENDERBUFFER) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "EGLImageTargetRenderbufferStorageOES");
+      return;
+   }
+
+   rb = ctx->CurrentRenderbuffer;
+   if (!rb) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "EGLImageTargetRenderbufferStorageOES");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   ctx->Driver.EGLImageTargetRenderbufferStorage(ctx, rb, image);
+}
+#endif
+
+
+/**
+ * Helper function for _mesa_GetRenderbufferParameterivEXT() and
+ * _mesa_GetFramebufferAttachmentParameterivEXT()
+ * We have to be careful to respect the base format.  For example, if a
+ * renderbuffer/texture was created with internalFormat=GL_RGB but the
+ * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
+ * we need to return zero.
+ */
+static GLint
+get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
+{
+   switch (pname) {
+   case GL_RENDERBUFFER_RED_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
+      if (baseFormat == GL_RGB || baseFormat == GL_RGBA ||
+	  baseFormat == GL_RG || baseFormat == GL_RED)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_GREEN_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
+      if (baseFormat == GL_RGB || baseFormat == GL_RGBA || baseFormat == GL_RG)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_BLUE_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
+      if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
+      if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA ||
+	  baseFormat == GL_LUMINANCE_ALPHA)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
+      if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
+      if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
+         return _mesa_get_format_bits(format, pname);
+      else
+         return 0;
+   default:
+      return 0;
+   }
+}
+
+
+
+void GLAPIENTRY
+_mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
+                             GLsizei width, GLsizei height)
+{
+   /* GL_ARB_fbo says calling this function is equivalent to calling
+    * glRenderbufferStorageMultisample() with samples=0.  We pass in
+    * a token value here just for error reporting purposes.
+    */
+   renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
+}
+
+
+void GLAPIENTRY
+_mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
+                                     GLenum internalFormat,
+                                     GLsizei width, GLsizei height)
+{
+   renderbuffer_storage(target, internalFormat, width, height, samples);
+}
+
+
+/**
+ * OpenGL ES version of glRenderBufferStorage.
+ */
+void GLAPIENTRY
+_es_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
+			   GLsizei width, GLsizei height)
+{
+   switch (internalFormat) {
+   case GL_RGB565:
+      /* XXX this confuses GL_RENDERBUFFER_INTERNAL_FORMAT_OES */
+      /* choose a closest format */
+      internalFormat = GL_RGB5;
+      break;
+   default:
+      break;
+   }
+
+   renderbuffer_storage(target, internalFormat, width, height, 0);
+}
+
+
+void GLAPIENTRY
+_mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
+{
+   struct gl_renderbuffer *rb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (target != GL_RENDERBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetRenderbufferParameterivEXT(target)");
+      return;
+   }
+
+   rb = ctx->CurrentRenderbuffer;
+   if (!rb) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGetRenderbufferParameterivEXT");
+      return;
+   }
+
+   /* No need to flush here since we're just quering state which is
+    * not effected by rendering.
+    */
+
+   switch (pname) {
+   case GL_RENDERBUFFER_WIDTH_EXT:
+      *params = rb->Width;
+      return;
+   case GL_RENDERBUFFER_HEIGHT_EXT:
+      *params = rb->Height;
+      return;
+   case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
+      *params = rb->InternalFormat;
+      return;
+   case GL_RENDERBUFFER_RED_SIZE_EXT:
+   case GL_RENDERBUFFER_GREEN_SIZE_EXT:
+   case GL_RENDERBUFFER_BLUE_SIZE_EXT:
+   case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
+   case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
+   case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
+      *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
+      break;
+   case GL_RENDERBUFFER_SAMPLES:
+      if (ctx->Extensions.ARB_framebuffer_object) {
+         *params = rb->NumSamples;
+         break;
+      }
+      /* fallthrough */
+   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 = _mesa_lookup_framebuffer(ctx, framebuffer);
+      if (rb != NULL && rb != &DummyFramebuffer)
+         return GL_TRUE;
+   }
+   return GL_FALSE;
+}
+
+
+/**
+ * Check if any of the attachments of the given framebuffer are textures
+ * (render to texture).  Call ctx->Driver.RenderTexture() for such
+ * attachments.
+ */
+static void
+check_begin_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
+{
+   GLuint i;
+   ASSERT(ctx->Driver.RenderTexture);
+
+   if (fb->Name == 0)
+      return; /* can't render to texture with winsys framebuffers */
+
+   for (i = 0; i < BUFFER_COUNT; i++) {
+      struct gl_renderbuffer_attachment *att = fb->Attachment + i;
+      struct gl_texture_object *texObj = att->Texture;
+      if (texObj
+          && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
+         ctx->Driver.RenderTexture(ctx, fb, att);
+      }
+   }
+}
+
+
+/**
+ * Examine all the framebuffer's attachments to see if any are textures.
+ * If so, call ctx->Driver.FinishRenderTexture() for each texture to
+ * notify the device driver that the texture image may have changed.
+ */
+static void
+check_end_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
+{
+   if (fb->Name == 0)
+      return; /* can't render to texture with winsys framebuffers */
+
+   if (ctx->Driver.FinishRenderTexture) {
+      GLuint i;
+      for (i = 0; i < BUFFER_COUNT; i++) {
+         struct gl_renderbuffer_attachment *att = fb->Attachment + i;
+         if (att->Texture && att->Renderbuffer) {
+            ctx->Driver.FinishRenderTexture(ctx, att);
+         }
+      }
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
+{
+   struct gl_framebuffer *newDrawFb, *newReadFb;
+   struct gl_framebuffer *oldDrawFb, *oldReadFb;
+   GLboolean bindReadBuf, bindDrawBuf;
+   GET_CURRENT_CONTEXT(ctx);
+
+#ifdef DEBUG
+   if (ctx->Extensions.ARB_framebuffer_object) {
+      ASSERT(ctx->Extensions.EXT_framebuffer_object);
+      ASSERT(ctx->Extensions.EXT_framebuffer_blit);
+   }
+#endif
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (!ctx->Extensions.EXT_framebuffer_object) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBindFramebufferEXT(unsupported)");
+      return;
+   }
+
+   switch (target) {
+#if FEATURE_EXT_framebuffer_blit
+   case GL_DRAW_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
+         return;
+      }
+      bindDrawBuf = GL_TRUE;
+      bindReadBuf = GL_FALSE;
+      break;
+   case GL_READ_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
+         return;
+      }
+      bindDrawBuf = GL_FALSE;
+      bindReadBuf = GL_TRUE;
+      break;
+#endif
+   case GL_FRAMEBUFFER_EXT:
+      bindDrawBuf = GL_TRUE;
+      bindReadBuf = GL_TRUE;
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
+      return;
+   }
+
+   if (framebuffer) {
+      /* Binding a user-created framebuffer object */
+      newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);
+      if (newDrawFb == &DummyFramebuffer) {
+         /* ID was reserved, but no real framebuffer object made yet */
+         newDrawFb = NULL;
+      }
+      else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {
+         /* All FBO IDs must be Gen'd */
+         _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
+         return;
+      }
+
+      if (!newDrawFb) {
+	 /* create new framebuffer object */
+	 newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
+	 if (!newDrawFb) {
+	    _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
+	    return;
+	 }
+         _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);
+      }
+      newReadFb = newDrawFb;
+   }
+   else {
+      /* Binding the window system framebuffer (which was originally set
+       * with MakeCurrent).
+       */
+      newDrawFb = ctx->WinSysDrawBuffer;
+      newReadFb = ctx->WinSysReadBuffer;
+   }
+
+   ASSERT(newDrawFb);
+   ASSERT(newDrawFb != &DummyFramebuffer);
+
+   /* save pointers to current/old framebuffers */
+   oldDrawFb = ctx->DrawBuffer;
+   oldReadFb = ctx->ReadBuffer;
+
+   /* check if really changing bindings */
+   if (oldDrawFb == newDrawFb)
+      bindDrawBuf = GL_FALSE;
+   if (oldReadFb == newReadFb)
+      bindReadBuf = GL_FALSE;
+
+   /*
+    * OK, now bind the new Draw/Read framebuffers, if they're changing.
+    *
+    * We also check if we're beginning and/or ending render-to-texture.
+    * When a framebuffer with texture attachments is unbound, call
+    * ctx->Driver.FinishRenderTexture().
+    * When a framebuffer with texture attachments is bound, call
+    * ctx->Driver.RenderTexture().
+    *
+    * Note that if the ReadBuffer has texture attachments we don't consider
+    * that a render-to-texture case.
+    */
+   if (bindReadBuf) {
+      FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+      /* check if old readbuffer was render-to-texture */
+      check_end_texture_render(ctx, oldReadFb);
+
+      _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);
+   }
+
+   if (bindDrawBuf) {
+      FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+      /* check if old read/draw buffers were render-to-texture */
+      if (!bindReadBuf)
+         check_end_texture_render(ctx, oldReadFb);
+
+      if (oldDrawFb != oldReadFb)
+         check_end_texture_render(ctx, oldDrawFb);
+
+      /* check if newly bound framebuffer has any texture attachments */
+      check_begin_texture_render(ctx, newDrawFb);
+
+      _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);
+   }
+
+   if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
+      ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, 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 = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
+	 if (fb) {
+            ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
+
+            /* check if deleting currently bound framebuffer object */
+            if (ctx->Extensions.EXT_framebuffer_blit) {
+               /* separate draw/read binding points */
+               if (fb == ctx->DrawBuffer) {
+                  /* bind default */
+                  ASSERT(fb->RefCount >= 2);
+                  _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
+               }
+               if (fb == ctx->ReadBuffer) {
+                  /* bind default */
+                  ASSERT(fb->RefCount >= 2);
+                  _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
+               }
+            }
+            else {
+               /* only one binding point for read/draw buffers */
+               if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
+                  /* 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.
+                */
+               _mesa_reference_framebuffer(&fb, NULL);
+	    }
+	 }
+      }
+   }
+}
+
+
+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)
+{
+   struct gl_framebuffer *buffer;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
+
+   switch (target) {
+#if FEATURE_EXT_framebuffer_blit
+   case GL_DRAW_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
+         return 0;
+      }
+      buffer = ctx->DrawBuffer;
+      break;
+   case GL_READ_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
+         return 0;
+      }
+      buffer = ctx->ReadBuffer;
+      break;
+#endif
+   case GL_FRAMEBUFFER_EXT:
+      buffer = ctx->DrawBuffer;
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
+      return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
+   }
+
+   if (buffer->Name == 0) {
+      /* The window system / default framebuffer is always complete */
+      return GL_FRAMEBUFFER_COMPLETE_EXT;
+   }
+
+   /* No need to flush here */
+
+   if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
+      _mesa_test_framebuffer_completeness(ctx, buffer);
+   }
+
+   return buffer->_Status;
+}
+
+
+
+/**
+ * Common code called by glFramebufferTexture1D/2D/3DEXT().
+ */
+static void
+framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target, 
+                    GLenum attachment, GLenum textarget, GLuint texture,
+                    GLint level, GLint zoffset)
+{
+   struct gl_renderbuffer_attachment *att;
+   struct gl_texture_object *texObj = NULL;
+   struct gl_framebuffer *fb;
+   GLboolean error = GL_FALSE;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (target) {
+   case GL_READ_FRAMEBUFFER_EXT:
+      error = !ctx->Extensions.EXT_framebuffer_blit;
+      fb = ctx->ReadBuffer;
+      break;
+   case GL_DRAW_FRAMEBUFFER_EXT:
+      error = !ctx->Extensions.EXT_framebuffer_blit;
+      /* fall-through */
+   case GL_FRAMEBUFFER_EXT:
+      fb = ctx->DrawBuffer;
+      break;
+   default:
+      error = GL_TRUE;
+   }
+
+   if (error) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
+      return;
+   }
+
+   ASSERT(fb);
+
+   /* check framebuffer binding */
+   if (fb->Name == 0) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glFramebufferTexture%sEXT", caller);
+      return;
+   }
+
+
+   /* The textarget, level, and zoffset parameters are only validated if
+    * texture is non-zero.
+    */
+   if (texture) {
+      GLboolean err = GL_TRUE;
+
+      texObj = _mesa_lookup_texture(ctx, texture);
+      if (texObj != NULL) {
+         if (textarget == 0) {
+            /* XXX what's the purpose of this? */
+            err = (texObj->Target != GL_TEXTURE_3D) &&
+                (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
+                (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
+         }
+         else {
+            err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
+                ? !IS_CUBE_FACE(textarget)
+                : (texObj->Target != textarget);
+         }
+      }
+      else {
+         /* can't render to a non-existant texture */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glFramebufferTexture%sEXT(non existant texture)",
+                     caller);
+         return;
+      }
+
+      if (err) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glFramebufferTexture%sEXT(texture target mismatch)",
+                     caller);
+         return;
+      }
+
+      if (texObj->Target == GL_TEXTURE_3D) {
+         const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
+         if (zoffset < 0 || zoffset >= maxSize) {
+            _mesa_error(ctx, GL_INVALID_VALUE,
+                        "glFramebufferTexture%sEXT(zoffset)", caller);
+            return;
+         }
+      }
+      else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
+               (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
+         if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
+            _mesa_error(ctx, GL_INVALID_VALUE,
+                        "glFramebufferTexture%sEXT(layer)", caller);
+            return;
+         }
+      }
+
+      if ((level < 0) || 
+          (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glFramebufferTexture%sEXT(level)", caller);
+         return;
+      }
+   }
+
+   att = _mesa_get_attachment(ctx, fb, attachment);
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferTexture%sEXT(attachment)", caller);
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   _glthread_LOCK_MUTEX(fb->Mutex);
+   if (texObj) {
+      _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
+                                   level, zoffset);
+      /* Set the render-to-texture flag.  We'll check this flag in
+       * glTexImage() and friends to determine if we need to revalidate
+       * any FBOs that might be rendering into this texture.
+       * This flag never gets cleared since it's non-trivial to determine
+       * when all FBOs might be done rendering to this texture.  That's OK
+       * though since it's uncommon to render to a texture then repeatedly
+       * call glTexImage() to change images in the texture.
+       */
+      texObj->_RenderToTexture = GL_TRUE;
+   }
+   else {
+      _mesa_remove_attachment(ctx, att);
+   }
+
+   invalidate_framebuffer(fb);
+
+   _glthread_UNLOCK_MUTEX(fb->Mutex);
+}
+
+
+
+void GLAPIENTRY
+_mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
+                              GLenum textarget, GLuint texture, GLint level)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferTexture1DEXT(textarget)");
+      return;
+   }
+
+   framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
+                       level, 0);
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
+                              GLenum textarget, GLuint texture, GLint level)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if ((texture != 0) &&
+       (textarget != GL_TEXTURE_2D) &&
+       (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
+       (!IS_CUBE_FACE(textarget))) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
+      return;
+   }
+
+   framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
+                       level, 0);
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
+                              GLenum textarget, GLuint texture,
+                              GLint level, GLint zoffset)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferTexture3DEXT(textarget)");
+      return;
+   }
+
+   framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
+                       level, zoffset);
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
+                                 GLuint texture, GLint level, GLint layer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
+                       level, layer);
+}
+
+
+void GLAPIENTRY
+_mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
+                                 GLenum renderbufferTarget,
+                                 GLuint renderbuffer)
+{
+   struct gl_renderbuffer_attachment *att;
+   struct gl_framebuffer *fb;
+   struct gl_renderbuffer *rb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (target) {
+#if FEATURE_EXT_framebuffer_blit
+   case GL_DRAW_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glFramebufferRenderbufferEXT(target)");
+         return;
+      }
+      fb = ctx->DrawBuffer;
+      break;
+   case GL_READ_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glFramebufferRenderbufferEXT(target)");
+         return;
+      }
+      fb = ctx->ReadBuffer;
+      break;
+#endif
+   case GL_FRAMEBUFFER_EXT:
+      fb = ctx->DrawBuffer;
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferRenderbufferEXT(target)");
+      return;
+   }
+
+   if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferRenderbufferEXT(renderbufferTarget)");
+      return;
+   }
+
+   if (fb->Name == 0) {
+      /* Can't attach new renderbuffers to a window system framebuffer */
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
+      return;
+   }
+
+   att = _mesa_get_attachment(ctx, fb, attachment);
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glFramebufferRenderbufferEXT(invalid attachment %s)",
+                  _mesa_lookup_enum_by_nr(attachment));
+      return;
+   }
+
+   if (renderbuffer) {
+      rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
+      if (!rb) {
+	 _mesa_error(ctx, GL_INVALID_OPERATION,
+		     "glFramebufferRenderbufferEXT(non-existant"
+                     " renderbuffer %u)", renderbuffer);
+	 return;
+      }
+      else if (rb == &DummyRenderbuffer) {
+         /* This is what NVIDIA does */
+	 _mesa_error(ctx, GL_INVALID_VALUE,
+		     "glFramebufferRenderbufferEXT(renderbuffer %u)",
+                     renderbuffer);
+	 return;
+      }
+   }
+   else {
+      /* remove renderbuffer attachment */
+      rb = NULL;
+   }
+
+   if (attachment == GL_DEPTH_STENCIL_ATTACHMENT &&
+       rb && rb->Format != MESA_FORMAT_NONE) {
+      /* make sure the renderbuffer is a depth/stencil format */
+      const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
+      if (baseFormat != GL_DEPTH_STENCIL) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glFramebufferRenderbufferEXT(renderbuffer"
+                     " is not DEPTH_STENCIL format)");
+         return;
+      }
+   }
+
+
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   assert(ctx->Driver.FramebufferRenderbuffer);
+   ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
+
+   /* Some subsequent GL commands may depend on the framebuffer's visual
+    * after the binding is updated.  Update visual info now.
+    */
+   _mesa_update_framebuffer_visual(ctx, fb);
+}
+
+
+void GLAPIENTRY
+_mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
+                                             GLenum pname, GLint *params)
+{
+   const struct gl_renderbuffer_attachment *att;
+   struct gl_framebuffer *buffer;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (target) {
+#if FEATURE_EXT_framebuffer_blit
+   case GL_DRAW_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glGetFramebufferAttachmentParameterivEXT(target)");
+         return;
+      }
+      buffer = ctx->DrawBuffer;
+      break;
+   case GL_READ_FRAMEBUFFER_EXT:
+      if (!ctx->Extensions.EXT_framebuffer_blit) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glGetFramebufferAttachmentParameterivEXT(target)");
+         return;
+      }
+      buffer = ctx->ReadBuffer;
+      break;
+#endif
+   case GL_FRAMEBUFFER_EXT:
+      buffer = ctx->DrawBuffer;
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetFramebufferAttachmentParameterivEXT(target)");
+      return;
+   }
+
+   if (buffer->Name == 0) {
+      /* the default / window-system FBO */
+      att = _mesa_get_fb0_attachment(ctx, buffer, attachment);
+   }
+   else {
+      /* user-created framebuffer FBO */
+      att = _mesa_get_attachment(ctx, buffer, attachment);
+   }
+
+   if (att == NULL) {
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetFramebufferAttachmentParameterivEXT(attachment)");
+      return;
+   }
+
+   if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
+      /* the depth and stencil attachments must point to the same buffer */
+      const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
+      depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
+      stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
+      if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
+                     " attachments differ)");
+         return;
+      }
+   }
+
+   /* No need to flush here */
+
+   switch (pname) {
+   case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
+      *params = buffer->Name == 0 ? GL_FRAMEBUFFER_DEFAULT : 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 {
+         assert(att->Type == GL_NONE);
+         *params = 0;
+      }
+      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) {
+         if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
+            *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
+         }
+         else {
+            *params = 0;
+         }
+      }
+      else {
+	 _mesa_error(ctx, GL_INVALID_ENUM,
+		     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
+      if (att->Type == GL_TEXTURE) {
+         if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
+            *params = att->Zoffset;
+         }
+         else {
+            *params = 0;
+         }
+      }
+      else {
+	 _mesa_error(ctx, GL_INVALID_ENUM,
+		     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
+      if (!ctx->Extensions.ARB_framebuffer_object) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      else {
+         *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
+      }
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
+      if (!ctx->Extensions.ARB_framebuffer_object) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+         return;
+      }
+      else {
+         gl_format format = att->Renderbuffer->Format;
+         if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
+            /* special cases */
+            *params = GL_INDEX;
+         }
+         else {
+            *params = _mesa_get_format_datatype(format);
+         }
+      }
+      return;
+   case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
+   case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
+   case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
+   case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
+   case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
+   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
+      if (!ctx->Extensions.ARB_framebuffer_object) {
+         _mesa_error(ctx, GL_INVALID_ENUM,
+                     "glGetFramebufferAttachmentParameterivEXT(pname)");
+      }
+      else if (att->Texture) {
+         const struct gl_texture_image *texImage =
+            _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
+                                   att->TextureLevel);
+         if (texImage) {
+            *params = get_component_bits(pname, texImage->_BaseFormat,
+                                         texImage->TexFormat);
+         }
+         else {
+            *params = 0;
+         }
+      }
+      else if (att->Renderbuffer) {
+         *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
+                                      att->Renderbuffer->Format);
+      }
+      else {
+         *params = 0;
+      }
+      return;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glGetFramebufferAttachmentParameterivEXT(pname)");
+      return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GenerateMipmapEXT(GLenum target)
+{
+   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:
+      /* XXX need to implement GL_TEXTURE_1D_ARRAY and GL_TEXTURE_2D_ARRAY */
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
+      return;
+   }
+
+   texObj = _mesa_get_current_tex_object(ctx, target);
+
+   if (texObj->BaseLevel >= texObj->MaxLevel) {
+      /* nothing to do */
+      return;
+   }
+
+   if (texObj->Target == GL_TEXTURE_CUBE_MAP &&
+       !_mesa_cube_complete(texObj)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGenerateMipmap(incomplete cube map)");
+      return;
+   }
+
+   _mesa_lock_texture(ctx, texObj);
+   if (target == GL_TEXTURE_CUBE_MAP) {
+      GLuint face;
+      for (face = 0; face < 6; face++)
+	 ctx->Driver.GenerateMipmap(ctx,
+				    GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
+				    texObj);
+   }
+   else {
+      ctx->Driver.GenerateMipmap(ctx, target, texObj);
+   }
+   _mesa_unlock_texture(ctx, texObj);
+}
+
+
+#if FEATURE_EXT_framebuffer_blit
+
+static const struct gl_renderbuffer_attachment *
+find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)
+{
+   GLuint i;
+   for (i = 0; i < Elements(fb->Attachment); i++) {
+      if (fb->Attachment[i].Renderbuffer == rb)
+         return &fb->Attachment[i];
+   }
+   return NULL;
+}
+
+
+
+/**
+ * Blit rectangular region, optionally from one framebuffer to another.
+ *
+ * Note, if the src buffer is multisampled and the dest is not, this is
+ * when the samples must be resolved to a single color.
+ */
+void GLAPIENTRY
+_mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+                         GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+                         GLbitfield mask, GLenum filter)
+{
+   const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
+                                     GL_DEPTH_BUFFER_BIT |
+                                     GL_STENCIL_BUFFER_BIT);
+   const struct gl_framebuffer *readFb, *drawFb;
+   const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
+   GET_CURRENT_CONTEXT(ctx);
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   FLUSH_VERTICES(ctx, _NEW_BUFFERS);
+
+   if (ctx->NewState) {
+      _mesa_update_state(ctx);
+   }
+
+   readFb = ctx->ReadBuffer;
+   drawFb = ctx->DrawBuffer;
+
+   if (!readFb || !drawFb) {
+      /* This will normally never happen but someday we may want to
+       * support MakeCurrent() with no drawables.
+       */
+      return;
+   }
+
+   /* check for complete framebuffers */
+   if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
+       readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
+                  "glBlitFramebufferEXT(incomplete draw/read buffers)");
+      return;
+   }
+
+   if (filter != GL_NEAREST && filter != GL_LINEAR) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
+      return;
+   }
+
+   if (mask & ~legalMaskBits) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
+      return;
+   }
+
+   /* depth/stencil must be blitted with nearest filtering */
+   if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
+        && filter != GL_NEAREST) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+             "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
+      return;
+   }
+
+   /* get color read/draw renderbuffers */
+   if (mask & GL_COLOR_BUFFER_BIT) {
+      colorReadRb = readFb->_ColorReadBuffer;
+      colorDrawRb = drawFb->_ColorDrawBuffers[0];
+   }
+   else {
+      colorReadRb = colorDrawRb = NULL;
+   }
+
+   if (mask & GL_STENCIL_BUFFER_BIT) {
+      struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
+      struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
+      if (!readRb ||
+          !drawRb ||
+          _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) != 
+          _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glBlitFramebufferEXT(stencil buffer size mismatch");
+         return;
+      }
+   }
+
+   if (mask & GL_DEPTH_BUFFER_BIT) {
+      struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
+      struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
+      if (!readRb ||
+          !drawRb ||
+          _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) != 
+          _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glBlitFramebufferEXT(depth buffer size mismatch");
+         return;
+      }
+   }
+
+   if (readFb->Visual.samples > 0 &&
+       drawFb->Visual.samples > 0 &&
+       readFb->Visual.samples != drawFb->Visual.samples) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBlitFramebufferEXT(mismatched samples");
+      return;
+   }
+
+   /* extra checks for multisample copies... */
+   if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
+      /* src and dest region sizes must be the same */
+      if (srcX1 - srcX0 != dstX1 - dstX0 ||
+          srcY1 - srcY0 != dstY1 - dstY0) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                "glBlitFramebufferEXT(bad src/dst multisample region sizes");
+         return;
+      }
+
+      /* color formats must match */
+      if (colorReadRb &&
+          colorDrawRb &&
+          colorReadRb->Format != colorDrawRb->Format) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
+         return;
+      }
+   }
+
+   if (!ctx->Extensions.EXT_framebuffer_blit) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
+      return;
+   }
+
+   /* Debug code */
+   if (DEBUG_BLIT) {
+      printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
+	     " 0x%x, 0x%x)\n",
+	     srcX0, srcY0, srcX1, srcY1,
+	     dstX0, dstY0, dstX1, dstY1,
+	     mask, filter);
+      if (colorReadRb) {
+         const struct gl_renderbuffer_attachment *att;
+
+         att = find_attachment(readFb, colorReadRb);
+         printf("  Src FBO %u  RB %u (%dx%d)  ",
+		readFb->Name, colorReadRb->Name,
+		colorReadRb->Width, colorReadRb->Height);
+         if (att && att->Texture) {
+            printf("Tex %u  tgt 0x%x  level %u  face %u",
+		   att->Texture->Name,
+		   att->Texture->Target,
+		   att->TextureLevel,
+		   att->CubeMapFace);
+         }
+         printf("\n");
+
+         att = find_attachment(drawFb, colorDrawRb);
+         printf("  Dst FBO %u  RB %u (%dx%d)  ",
+		drawFb->Name, colorDrawRb->Name,
+		colorDrawRb->Width, colorDrawRb->Height);
+         if (att && att->Texture) {
+            printf("Tex %u  tgt 0x%x  level %u  face %u",
+		   att->Texture->Name,
+		   att->Texture->Target,
+		   att->TextureLevel,
+		   att->CubeMapFace);
+         }
+         printf("\n");
+      }
+   }
+
+   ASSERT(ctx->Driver.BlitFramebuffer);
+   ctx->Driver.BlitFramebuffer(ctx,
+                               srcX0, srcY0, srcX1, srcY1,
+                               dstX0, dstY0, dstX1, dstY1,
+                               mask, filter);
+}
+#endif /* FEATURE_EXT_framebuffer_blit */
+
+#if FEATURE_ARB_geometry_shader4
+void GLAPIENTRY
+_mesa_FramebufferTextureARB(GLenum target, GLenum attachment,
+                            GLuint texture, GLint level)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   _mesa_error(ctx, GL_INVALID_OPERATION,
+               "glFramebufferTextureARB "
+               "not implemented!");
+}
+
+void GLAPIENTRY
+_mesa_FramebufferTextureFaceARB(GLenum target, GLenum attachment,
+                                GLuint texture, GLint level, GLenum face)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   _mesa_error(ctx, GL_INVALID_OPERATION,
+               "glFramebufferTextureFaceARB "
+               "not implemented!");
+}
+#endif /* FEATURE_ARB_geometry_shader4 */