xkeyboard-config mesa git update 8 Mar 2011

6 files changed, 1601 insertions, 1571 deletions

diff --git a/mesalib/src/mesa/main/bufferobj.c b/mesalib/src/mesa/main/bufferobj.c
index 35d92616f..44072fbc5 100644
--- a/mesalib/src/mesa/main/bufferobj.c
+++ b/mesalib/src/mesa/main/bufferobj.c
@@ -558,6 +558,7 @@ void
 _mesa_init_buffer_objects( struct gl_context *ctx )
 {
    memset(&DummyBufferObject, 0, sizeof(DummyBufferObject));
+   _glthread_INIT_MUTEX(DummyBufferObject.Mutex);
    DummyBufferObject.RefCount = 1000*1000*1000; /* never delete */
 
    _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj,
diff --git a/mesalib/src/mesa/main/drawpix.c b/mesalib/src/mesa/main/drawpix.c
index 98e82ef85..fb86036a1 100644
--- a/mesalib/src/mesa/main/drawpix.c
+++ b/mesalib/src/mesa/main/drawpix.c
@@ -136,8 +136,6 @@ _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 
-   _mesa_finish(ctx);
-
    if (MESA_VERBOSE & VERBOSE_API)
       _mesa_debug(ctx,
                   "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
diff --git a/mesalib/src/mesa/main/fbobject.c b/mesalib/src/mesa/main/fbobject.c
index c242e568d..ffdd08425 100644
--- a/mesalib/src/mesa/main/fbobject.c
+++ b/mesalib/src/mesa/main/fbobject.c
@@ -384,6 +384,7 @@ _mesa_framebuffer_renderbuffer(struct gl_context *ctx,
          assert(att);
          _mesa_set_renderbuffer_attachment(ctx, att, rb);
       }
+      rb->AttachedAnytime = GL_TRUE;
    }
    else {
       _mesa_remove_attachment(ctx, att);
@@ -1115,6 +1116,31 @@ _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
 }
 
 
+/**
+ * Invalidate a renderbuffer attachment.  Called from _mesa_HashWalk().
+ */
+static void
+invalidate_rb(GLuint key, void *data, void *userData)
+{
+   struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
+   struct gl_renderbuffer *rb = (struct gl_renderbuffer *) userData;
+
+   /* If this is a user-created FBO */
+   if (fb->Name) {
+      GLuint i;
+      for (i = 0; i < BUFFER_COUNT; i++) {
+         struct gl_renderbuffer_attachment *att = fb->Attachment + i;
+         if (att->Type == GL_RENDERBUFFER &&
+             att->Renderbuffer == rb) {
+            /* Mark fb status as indeterminate to force re-validation */
+            fb->_Status = 0;
+            return;
+         }
+      }
+   }
+}
+
+
 /** sentinal value, see below */
 #define NO_SAMPLES 1000
 
@@ -1207,12 +1233,10 @@ renderbuffer_storage(GLenum target, GLenum internalFormat,
       rb->NumSamples = 0;
    }
 
-   /*
-   test_framebuffer_completeness(ctx, fb);
-   */
-   /* XXX if this renderbuffer is attached anywhere, invalidate attachment
-    * points???
-    */
+   /* Invalidate the framebuffers the renderbuffer is attached in. */
+   if (rb->AttachedAnytime) {
+      _mesa_HashWalk(ctx->Shared->FrameBuffers, invalidate_rb, rb);
+   }
 }
 
 
diff --git a/mesalib/src/mesa/main/mtypes.h b/mesalib/src/mesa/main/mtypes.h
index db3eba20c..49ecea59d 100644
--- a/mesalib/src/mesa/main/mtypes.h
+++ b/mesalib/src/mesa/main/mtypes.h
@@ -2376,6 +2376,8 @@ struct gl_renderbuffer
    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
 
+   GLboolean AttachedAnytime; /**< TRUE if it was attached to a framebuffer */
+
    /* Used to wrap one renderbuffer around another: */
    struct gl_renderbuffer *Wrapped;
 
diff --git a/mesalib/src/mesa/state_tracker/st_cb_fbo.c b/mesalib/src/mesa/state_tracker/st_cb_fbo.c
index 7e124186c..ae49434ca 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_fbo.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_fbo.c
@@ -1,641 +1,645 @@
-/**************************************************************************

- * 

- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

- * 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, sub license, 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 (including the

- * next paragraph) 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 NON-INFRINGEMENT.

- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.

- * 

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

-

-

-/**

- * Framebuffer/renderbuffer functions.

- *

- * \author Brian Paul

- */

-

-

-#include "main/imports.h"

-#include "main/context.h"

-#include "main/fbobject.h"

-#include "main/framebuffer.h"

-#include "main/macros.h"

-#include "main/mfeatures.h"

-#include "main/renderbuffer.h"

-

-#include "pipe/p_context.h"

-#include "pipe/p_defines.h"

-#include "pipe/p_screen.h"

-#include "st_context.h"

-#include "st_cb_fbo.h"

-#include "st_cb_flush.h"

-#include "st_format.h"

-#include "st_texture.h"

-#include "st_manager.h"

-

-#include "util/u_format.h"

-#include "util/u_inlines.h"

-#include "util/u_surface.h"

-

-

-/**

- * gl_renderbuffer::AllocStorage()

- * This is called to allocate the original drawing surface, and

- * during window resize.

- */

-static GLboolean

-st_renderbuffer_alloc_storage(struct gl_context * ctx,

-                              struct gl_renderbuffer *rb,

-                              GLenum internalFormat,

-                              GLuint width, GLuint height)

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   struct pipe_screen *screen = st->pipe->screen;

-   struct st_renderbuffer *strb = st_renderbuffer(rb);

-   enum pipe_format format;

-   struct pipe_surface surf_tmpl;

-

-   if (strb->format != PIPE_FORMAT_NONE)

-      format = strb->format;

-   else

-      format = st_choose_renderbuffer_format(screen, internalFormat,

-                                             rb->NumSamples);

-      

-   /* init renderbuffer fields */

-   strb->Base.Width  = width;

-   strb->Base.Height = height;

-   strb->Base.Format = st_pipe_format_to_mesa_format(format);

-   strb->Base._BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);

-   strb->Base.DataType = st_format_datatype(format);

-

-   strb->defined = GL_FALSE;  /* undefined contents now */

-

-   if (strb->software) {

-      size_t size;

-      

-      free(strb->data);

-

-      assert(strb->format != PIPE_FORMAT_NONE);

-      

-      strb->stride = util_format_get_stride(strb->format, width);

-      size = util_format_get_2d_size(strb->format, strb->stride, height);

-      

-      strb->data = malloc(size);

-      

-      return strb->data != NULL;

-   }

-   else {

-      struct pipe_resource template;

-    

-      /* Free the old surface and texture

-       */

-      pipe_surface_reference( &strb->surface, NULL );

-      pipe_resource_reference( &strb->texture, NULL );

-      pipe_sampler_view_reference(&strb->sampler_view, NULL);

-

-      /* Setup new texture template.

-       */

-      memset(&template, 0, sizeof(template));

-      template.target = st->internal_target;

-      template.format = format;

-      template.width0 = width;

-      template.height0 = height;

-      template.depth0 = 1;

-      template.array_size = 1;

-      template.last_level = 0;

-      template.nr_samples = rb->NumSamples;

-      if (util_format_is_depth_or_stencil(format)) {

-         template.bind = PIPE_BIND_DEPTH_STENCIL;

-      }

-      else {

-         template.bind = (PIPE_BIND_DISPLAY_TARGET |

-                          PIPE_BIND_RENDER_TARGET);

-      }

-

-      strb->texture = screen->resource_create(screen, &template);

-

-      if (!strb->texture) 

-         return FALSE;

-

-      memset(&surf_tmpl, 0, sizeof(surf_tmpl));

-      u_surface_default_template(&surf_tmpl, strb->texture, template.bind);

-      strb->surface = pipe->create_surface(pipe,

-                                           strb->texture,

-                                           &surf_tmpl);

-      if (strb->surface) {

-         assert(strb->surface->texture);

-         assert(strb->surface->format);

-         assert(strb->surface->width == width);

-         assert(strb->surface->height == height);

-      }

-

-      return strb->surface != NULL;

-   }

-}

-

-

-/**

- * gl_renderbuffer::Delete()

- */

-static void

-st_renderbuffer_delete(struct gl_renderbuffer *rb)

-{

-   struct st_renderbuffer *strb = st_renderbuffer(rb);

-   ASSERT(strb);

-   pipe_surface_reference(&strb->surface, NULL);

-   pipe_resource_reference(&strb->texture, NULL);

-   pipe_sampler_view_reference(&strb->sampler_view, NULL);

-   free(strb->data);

-   free(strb);

-}

-

-

-/**

- * gl_renderbuffer::GetPointer()

- */

-static void *

-null_get_pointer(struct gl_context * ctx, struct gl_renderbuffer *rb,

-                 GLint x, GLint y)

-{

-   /* By returning NULL we force all software rendering to go through

-    * the span routines.

-    */

-#if 0

-   assert(0);  /* Should never get called with softpipe */

-#endif

-   return NULL;

-}

-

-

-/**

- * Called via ctx->Driver.NewFramebuffer()

- */

-static struct gl_framebuffer *

-st_new_framebuffer(struct gl_context *ctx, GLuint name)

-{

-   /* XXX not sure we need to subclass gl_framebuffer for pipe */

-   return _mesa_new_framebuffer(ctx, name);

-}

-

-

-/**

- * Called via ctx->Driver.NewRenderbuffer()

- */

-static struct gl_renderbuffer *

-st_new_renderbuffer(struct gl_context *ctx, GLuint name)

-{

-   struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer);

-   if (strb) {

-      _mesa_init_renderbuffer(&strb->Base, name);

-      strb->Base.Delete = st_renderbuffer_delete;

-      strb->Base.AllocStorage = st_renderbuffer_alloc_storage;

-      strb->Base.GetPointer = null_get_pointer;

-      strb->format = PIPE_FORMAT_NONE;

-      return &strb->Base;

-   }

-   return NULL;

-}

-

-

-/**

- * Allocate a renderbuffer for a an on-screen window (not a user-created

- * renderbuffer).  The window system code determines the format.

- */

-struct gl_renderbuffer *

-st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw)

-{

-   struct st_renderbuffer *strb;

-

-   strb = ST_CALLOC_STRUCT(st_renderbuffer);

-   if (!strb) {

-      _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");

-      return NULL;

-   }

-

-   _mesa_init_renderbuffer(&strb->Base, 0);

-   strb->Base.ClassID = 0x4242; /* just a unique value */

-   strb->Base.NumSamples = samples;

-   strb->Base.Format = st_pipe_format_to_mesa_format(format);

-   strb->Base._BaseFormat = _mesa_get_format_base_format(strb->Base.Format);

-   strb->Base.DataType = st_format_datatype(format);

-   strb->format = format;

-   strb->software = sw;

-   

-   switch (format) {

-   case PIPE_FORMAT_R8G8B8A8_UNORM:

-   case PIPE_FORMAT_B8G8R8A8_UNORM:

-   case PIPE_FORMAT_A8R8G8B8_UNORM:

-   case PIPE_FORMAT_R8G8B8X8_UNORM:

-   case PIPE_FORMAT_B8G8R8X8_UNORM:

-   case PIPE_FORMAT_X8R8G8B8_UNORM:

-   case PIPE_FORMAT_B5G5R5A1_UNORM:

-   case PIPE_FORMAT_B4G4R4A4_UNORM:

-   case PIPE_FORMAT_B5G6R5_UNORM:

-      strb->Base.InternalFormat = GL_RGBA;

-      break;

-   case PIPE_FORMAT_Z16_UNORM:

-      strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;

-      break;

-   case PIPE_FORMAT_Z32_UNORM:

-      strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;

-      break;

-   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:

-   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:

-   case PIPE_FORMAT_Z24X8_UNORM:

-   case PIPE_FORMAT_X8Z24_UNORM:

-      strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;

-      break;

-   case PIPE_FORMAT_S8_USCALED:

-      strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;

-      break;

-   case PIPE_FORMAT_R16G16B16A16_SNORM:

-      strb->Base.InternalFormat = GL_RGBA16;

-      break;

-   case PIPE_FORMAT_R8_UNORM:

-      strb->Base.InternalFormat = GL_R8;

-      break;

-   case PIPE_FORMAT_R8G8_UNORM:

-      strb->Base.InternalFormat = GL_RG8;

-      break;

-   case PIPE_FORMAT_R16_UNORM:

-      strb->Base.InternalFormat = GL_R16;

-      break;

-   case PIPE_FORMAT_R16G16_UNORM:

-      strb->Base.InternalFormat = GL_RG16;

-      break;

-   default:

-      _mesa_problem(NULL,

-		    "Unexpected format in st_new_renderbuffer_fb");

-      free(strb);

-      return NULL;

-   }

-

-   /* st-specific methods */

-   strb->Base.Delete = st_renderbuffer_delete;

-   strb->Base.AllocStorage = st_renderbuffer_alloc_storage;

-   strb->Base.GetPointer = null_get_pointer;

-

-   /* surface is allocated in st_renderbuffer_alloc_storage() */

-   strb->surface = NULL;

-

-   return &strb->Base;

-}

-

-

-

-

-/**

- * Called via ctx->Driver.BindFramebufferEXT().

- */

-static void

-st_bind_framebuffer(struct gl_context *ctx, GLenum target,

-                    struct gl_framebuffer *fb, struct gl_framebuffer *fbread)

-{

-

-}

-

-/**

- * Called by ctx->Driver.FramebufferRenderbuffer

- */

-static void

-st_framebuffer_renderbuffer(struct gl_context *ctx, 

-                            struct gl_framebuffer *fb,

-                            GLenum attachment,

-                            struct gl_renderbuffer *rb)

-{

-   /* XXX no need for derivation? */

-   _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);

-}

-

-

-/**

- * Called by ctx->Driver.RenderTexture

- */

-static void

-st_render_texture(struct gl_context *ctx,

-                  struct gl_framebuffer *fb,

-                  struct gl_renderbuffer_attachment *att)

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_context *pipe = st->pipe;

-   struct st_renderbuffer *strb;

-   struct gl_renderbuffer *rb;

-   struct pipe_resource *pt = st_get_texobj_resource(att->Texture);

-   struct st_texture_object *stObj;

-   const struct gl_texture_image *texImage;

-   struct pipe_surface surf_tmpl;

-

-   /* When would this fail?  Perhaps assert? */

-   if (!pt) 

-      return;

-

-   /* get pointer to texture image we're rendeing to */

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

-

-   /* create new renderbuffer which wraps the texture image */

-   rb = st_new_renderbuffer(ctx, 0);

-   if (!rb) {

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

-      return;

-   }

-

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

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

-   rb->AllocStorage = NULL; /* should not get called */

-   strb = st_renderbuffer(rb);

-

-   assert(strb->Base.RefCount > 0);

-

-   /* get the texture for the texture object */

-   stObj = st_texture_object(att->Texture);

-

-   /* point renderbuffer at texobject */

-   strb->rtt = stObj;

-   strb->rtt_level = att->TextureLevel;

-   strb->rtt_face = att->CubeMapFace;

-   strb->rtt_slice = att->Zoffset;

-

-   rb->Width = texImage->Width2;

-   rb->Height = texImage->Height2;

-   rb->_BaseFormat = texImage->_BaseFormat;

-   /*printf("***** render to texture level %d: %d x %d\n", att->TextureLevel, rb->Width, rb->Height);*/

-

-   /*printf("***** pipe texture %d x %d\n", pt->width0, pt->height0);*/

-

-   pipe_resource_reference( &strb->texture, pt );

-

-   pipe_surface_reference(&strb->surface, NULL);

-

-   pipe_sampler_view_reference(&strb->sampler_view,

-                               st_get_texture_sampler_view(stObj, pipe));

-

-   assert(strb->rtt_level <= strb->texture->last_level);

-

-   /* new surface for rendering into the texture */

-   memset(&surf_tmpl, 0, sizeof(surf_tmpl));

-   surf_tmpl.format = ctx->Color.sRGBEnabled ? strb->texture->format : util_format_linear(strb->texture->format);

-   surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;

-   surf_tmpl.u.tex.level = strb->rtt_level;

-   surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice;

-   surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice;

-   strb->surface = pipe->create_surface(pipe,

-                                        strb->texture,

-                                        &surf_tmpl);

-

-   strb->format = pt->format;

-

-   strb->Base.Format = st_pipe_format_to_mesa_format(pt->format);

-   strb->Base.DataType = st_format_datatype(pt->format);

-

-   /*

-   printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",

-          att->Texture, pt, strb->surface, rb->Width, rb->Height);

-   */

-

-   /* Invalidate buffer state so that the pipe's framebuffer state

-    * gets updated.

-    * That's where the new renderbuffer (which we just created) gets

-    * passed to the pipe as a (color/depth) render target.

-    */

-   st_invalidate_state(ctx, _NEW_BUFFERS);

-}

-

-

-/**

- * Called via ctx->Driver.FinishRenderTexture.

- */

-static void

-st_finish_render_texture(struct gl_context *ctx,

-                         struct gl_renderbuffer_attachment *att)

-{

-   struct st_context *st = st_context(ctx);

-   struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);

-

-   if (!strb)

-      return;

-

-   st_flush(st, PIPE_FLUSH_RENDER_CACHE, NULL);

-

-   strb->rtt = NULL;

-

-   /*

-   printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);

-   */

-

-   /* restore previous framebuffer state */

-   st_invalidate_state(ctx, _NEW_BUFFERS);

-}

-

-

-/**

- * Validate a renderbuffer attachment for a particular set of bindings.

- */

-static GLboolean

-st_validate_attachment(struct gl_context *ctx,

-		       struct pipe_screen *screen,

-		       const struct gl_renderbuffer_attachment *att,

-		       unsigned bindings)

-{

-   const struct st_texture_object *stObj = st_texture_object(att->Texture);

-   enum pipe_format format;

-   gl_format texFormat;

-

-   /* Only validate texture attachments for now, since

-    * st_renderbuffer_alloc_storage makes sure that

-    * the format is supported.

-    */

-   if (att->Type != GL_TEXTURE)

-      return GL_TRUE;

-

-   if (!stObj)

-      return GL_FALSE;

-

-   format = stObj->pt->format;

-   texFormat =

-      stObj->base.Image[att->CubeMapFace][att->TextureLevel]->TexFormat;

-

-   /* If the encoding is sRGB and sRGB rendering cannot be enabled,

-    * check for linear format support instead.

-    * Later when we create a surface, we change the format to a linear one. */

-   if (!ctx->Const.sRGBCapable &&

-       _mesa_get_format_color_encoding(texFormat) == GL_SRGB) {

-      const gl_format linearFormat = _mesa_get_srgb_format_linear(texFormat);

-      format = st_mesa_format_to_pipe_format(linearFormat);

-   }

-

-   return screen->is_format_supported(screen, format,

-                                      PIPE_TEXTURE_2D,

-                                      stObj->pt->nr_samples, bindings, 0);

-}

-

-

-/**

- * Check if two renderbuffer attachments name a combined depth/stencil

- * renderbuffer.

- */

-GLboolean

-st_is_depth_stencil_combined(const struct gl_renderbuffer_attachment *depth,

-                             const struct gl_renderbuffer_attachment *stencil)

-{

-   assert(depth && stencil);

-

-   if (depth->Type == stencil->Type) {

-      if (depth->Type == GL_RENDERBUFFER_EXT &&

-          depth->Renderbuffer == stencil->Renderbuffer)

-         return GL_TRUE;

-

-      if (depth->Type == GL_TEXTURE &&

-          depth->Texture == stencil->Texture)

-         return GL_TRUE;

-   }

-

-   return GL_FALSE;

-}

- 

-

-/**

- * Check that the framebuffer configuration is valid in terms of what

- * the driver can support.

- *

- * For Gallium we only supports combined Z+stencil, not separate buffers.

- */

-static void

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

-{

-   struct st_context *st = st_context(ctx);

-   struct pipe_screen *screen = st->pipe->screen;

-   const struct gl_renderbuffer_attachment *depth =

-         &fb->Attachment[BUFFER_DEPTH];

-   const struct gl_renderbuffer_attachment *stencil =

-         &fb->Attachment[BUFFER_STENCIL];

-   GLuint i;

-

-   if (depth->Type && stencil->Type && depth->Type != stencil->Type) {

-      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;

-      return;

-   }

-   if (depth->Type == GL_RENDERBUFFER_EXT &&

-       stencil->Type == GL_RENDERBUFFER_EXT &&

-       depth->Renderbuffer != stencil->Renderbuffer) {

-      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;

-      return;

-   }

-   if (depth->Type == GL_TEXTURE &&

-       stencil->Type == GL_TEXTURE &&

-       depth->Texture != stencil->Texture) {

-      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;

-      return;

-   }

-

-   if (!st_validate_attachment(ctx,

-                               screen,

-                               depth,

-			       PIPE_BIND_DEPTH_STENCIL)) {

-      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;

-      return;

-   }

-   if (!st_validate_attachment(ctx,

-                               screen,

-                               stencil,

-			       PIPE_BIND_DEPTH_STENCIL)) {

-      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;

-      return;

-   }

-   for (i = 0; i < ctx->Const.MaxColorAttachments; i++) {

-      if (!st_validate_attachment(ctx,

-                                  screen,

-				  &fb->Attachment[BUFFER_COLOR0 + i],

-				  PIPE_BIND_RENDER_TARGET)) {

-	 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;

-	 return;

-      }

-   }

-}

-

-

-/**

- * Called via glDrawBuffer.

- */

-static void

-st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers)

-{

-   struct st_context *st = st_context(ctx);

-   struct gl_framebuffer *fb = ctx->DrawBuffer;

-   GLuint i;

-

-   (void) count;

-   (void) buffers;

-

-   /* add the renderbuffers on demand */

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

-      gl_buffer_index idx = fb->_ColorDrawBufferIndexes[i];

-      st_manager_add_color_renderbuffer(st, fb, idx);

-   }

-}

-

-

-/**

- * Called via glReadBuffer.

- */

-static void

-st_ReadBuffer(struct gl_context *ctx, GLenum buffer)

-{

-   struct st_context *st = st_context(ctx);

-   struct gl_framebuffer *fb = ctx->ReadBuffer;

-

-   (void) buffer;

-

-   /* add the renderbuffer on demand */

-   st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex);

-}

-

-

-void st_init_fbo_functions(struct dd_function_table *functions)

-{

-#if FEATURE_EXT_framebuffer_object

-   functions->NewFramebuffer = st_new_framebuffer;

-   functions->NewRenderbuffer = st_new_renderbuffer;

-   functions->BindFramebuffer = st_bind_framebuffer;

-   functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;

-   functions->RenderTexture = st_render_texture;

-   functions->FinishRenderTexture = st_finish_render_texture;

-   functions->ValidateFramebuffer = st_validate_framebuffer;

-#endif

-   /* no longer needed by core Mesa, drivers handle resizes...

-   functions->ResizeBuffers = st_resize_buffers;

-   */

-

-   functions->DrawBuffers = st_DrawBuffers;

-   functions->ReadBuffer = st_ReadBuffer;

-}

-

-/* XXX unused ? */

-struct pipe_sampler_view *

-st_get_renderbuffer_sampler_view(struct st_renderbuffer *rb,

-                                 struct pipe_context *pipe)

-{

-   if (!rb->sampler_view) {

-      rb->sampler_view = st_create_texture_sampler_view(pipe, rb->texture);

-   }

-

-   return rb->sampler_view;

-}

+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ * 
+ **************************************************************************/
+
+
+/**
+ * Framebuffer/renderbuffer functions.
+ *
+ * \author Brian Paul
+ */
+
+
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/fbobject.h"
+#include "main/framebuffer.h"
+#include "main/macros.h"
+#include "main/mfeatures.h"
+#include "main/renderbuffer.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_screen.h"
+#include "st_context.h"
+#include "st_cb_fbo.h"
+#include "st_cb_flush.h"
+#include "st_format.h"
+#include "st_texture.h"
+#include "st_manager.h"
+
+#include "util/u_format.h"
+#include "util/u_inlines.h"
+#include "util/u_surface.h"
+
+
+/**
+ * gl_renderbuffer::AllocStorage()
+ * This is called to allocate the original drawing surface, and
+ * during window resize.
+ */
+static GLboolean
+st_renderbuffer_alloc_storage(struct gl_context * ctx,
+                              struct gl_renderbuffer *rb,
+                              GLenum internalFormat,
+                              GLuint width, GLuint height)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_screen *screen = st->pipe->screen;
+   struct st_renderbuffer *strb = st_renderbuffer(rb);
+   enum pipe_format format;
+   struct pipe_surface surf_tmpl;
+
+   if (strb->format != PIPE_FORMAT_NONE)
+      format = strb->format;
+   else
+      format = st_choose_renderbuffer_format(screen, internalFormat,
+                                             rb->NumSamples);
+
+   if (format == PIPE_FORMAT_NONE) {
+      return FALSE;
+   }
+
+   /* init renderbuffer fields */
+   strb->Base.Width  = width;
+   strb->Base.Height = height;
+   strb->Base.Format = st_pipe_format_to_mesa_format(format);
+   strb->Base._BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
+   strb->Base.DataType = st_format_datatype(format);
+
+   strb->defined = GL_FALSE;  /* undefined contents now */
+
+   if (strb->software) {
+      size_t size;
+      
+      free(strb->data);
+
+      assert(strb->format != PIPE_FORMAT_NONE);
+      
+      strb->stride = util_format_get_stride(strb->format, width);
+      size = util_format_get_2d_size(strb->format, strb->stride, height);
+      
+      strb->data = malloc(size);
+      
+      return strb->data != NULL;
+   }
+   else {
+      struct pipe_resource template;
+    
+      /* Free the old surface and texture
+       */
+      pipe_surface_reference( &strb->surface, NULL );
+      pipe_resource_reference( &strb->texture, NULL );
+      pipe_sampler_view_reference(&strb->sampler_view, NULL);
+
+      /* Setup new texture template.
+       */
+      memset(&template, 0, sizeof(template));
+      template.target = st->internal_target;
+      template.format = format;
+      template.width0 = width;
+      template.height0 = height;
+      template.depth0 = 1;
+      template.array_size = 1;
+      template.last_level = 0;
+      template.nr_samples = rb->NumSamples;
+      if (util_format_is_depth_or_stencil(format)) {
+         template.bind = PIPE_BIND_DEPTH_STENCIL;
+      }
+      else {
+         template.bind = (PIPE_BIND_DISPLAY_TARGET |
+                          PIPE_BIND_RENDER_TARGET);
+      }
+
+      strb->texture = screen->resource_create(screen, &template);
+
+      if (!strb->texture) 
+         return FALSE;
+
+      memset(&surf_tmpl, 0, sizeof(surf_tmpl));
+      u_surface_default_template(&surf_tmpl, strb->texture, template.bind);
+      strb->surface = pipe->create_surface(pipe,
+                                           strb->texture,
+                                           &surf_tmpl);
+      if (strb->surface) {
+         assert(strb->surface->texture);
+         assert(strb->surface->format);
+         assert(strb->surface->width == width);
+         assert(strb->surface->height == height);
+      }
+
+      return strb->surface != NULL;
+   }
+}
+
+
+/**
+ * gl_renderbuffer::Delete()
+ */
+static void
+st_renderbuffer_delete(struct gl_renderbuffer *rb)
+{
+   struct st_renderbuffer *strb = st_renderbuffer(rb);
+   ASSERT(strb);
+   pipe_surface_reference(&strb->surface, NULL);
+   pipe_resource_reference(&strb->texture, NULL);
+   pipe_sampler_view_reference(&strb->sampler_view, NULL);
+   free(strb->data);
+   free(strb);
+}
+
+
+/**
+ * gl_renderbuffer::GetPointer()
+ */
+static void *
+null_get_pointer(struct gl_context * ctx, struct gl_renderbuffer *rb,
+                 GLint x, GLint y)
+{
+   /* By returning NULL we force all software rendering to go through
+    * the span routines.
+    */
+#if 0
+   assert(0);  /* Should never get called with softpipe */
+#endif
+   return NULL;
+}
+
+
+/**
+ * Called via ctx->Driver.NewFramebuffer()
+ */
+static struct gl_framebuffer *
+st_new_framebuffer(struct gl_context *ctx, GLuint name)
+{
+   /* XXX not sure we need to subclass gl_framebuffer for pipe */
+   return _mesa_new_framebuffer(ctx, name);
+}
+
+
+/**
+ * Called via ctx->Driver.NewRenderbuffer()
+ */
+static struct gl_renderbuffer *
+st_new_renderbuffer(struct gl_context *ctx, GLuint name)
+{
+   struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer);
+   if (strb) {
+      _mesa_init_renderbuffer(&strb->Base, name);
+      strb->Base.Delete = st_renderbuffer_delete;
+      strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
+      strb->Base.GetPointer = null_get_pointer;
+      strb->format = PIPE_FORMAT_NONE;
+      return &strb->Base;
+   }
+   return NULL;
+}
+
+
+/**
+ * Allocate a renderbuffer for a an on-screen window (not a user-created
+ * renderbuffer).  The window system code determines the format.
+ */
+struct gl_renderbuffer *
+st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw)
+{
+   struct st_renderbuffer *strb;
+
+   strb = ST_CALLOC_STRUCT(st_renderbuffer);
+   if (!strb) {
+      _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
+      return NULL;
+   }
+
+   _mesa_init_renderbuffer(&strb->Base, 0);
+   strb->Base.ClassID = 0x4242; /* just a unique value */
+   strb->Base.NumSamples = samples;
+   strb->Base.Format = st_pipe_format_to_mesa_format(format);
+   strb->Base._BaseFormat = _mesa_get_format_base_format(strb->Base.Format);
+   strb->Base.DataType = st_format_datatype(format);
+   strb->format = format;
+   strb->software = sw;
+   
+   switch (format) {
+   case PIPE_FORMAT_R8G8B8A8_UNORM:
+   case PIPE_FORMAT_B8G8R8A8_UNORM:
+   case PIPE_FORMAT_A8R8G8B8_UNORM:
+   case PIPE_FORMAT_R8G8B8X8_UNORM:
+   case PIPE_FORMAT_B8G8R8X8_UNORM:
+   case PIPE_FORMAT_X8R8G8B8_UNORM:
+   case PIPE_FORMAT_B5G5R5A1_UNORM:
+   case PIPE_FORMAT_B4G4R4A4_UNORM:
+   case PIPE_FORMAT_B5G6R5_UNORM:
+      strb->Base.InternalFormat = GL_RGBA;
+      break;
+   case PIPE_FORMAT_Z16_UNORM:
+      strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
+      break;
+   case PIPE_FORMAT_Z32_UNORM:
+      strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
+      break;
+   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+   case PIPE_FORMAT_Z24X8_UNORM:
+   case PIPE_FORMAT_X8Z24_UNORM:
+      strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
+      break;
+   case PIPE_FORMAT_S8_USCALED:
+      strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
+      break;
+   case PIPE_FORMAT_R16G16B16A16_SNORM:
+      strb->Base.InternalFormat = GL_RGBA16;
+      break;
+   case PIPE_FORMAT_R8_UNORM:
+      strb->Base.InternalFormat = GL_R8;
+      break;
+   case PIPE_FORMAT_R8G8_UNORM:
+      strb->Base.InternalFormat = GL_RG8;
+      break;
+   case PIPE_FORMAT_R16_UNORM:
+      strb->Base.InternalFormat = GL_R16;
+      break;
+   case PIPE_FORMAT_R16G16_UNORM:
+      strb->Base.InternalFormat = GL_RG16;
+      break;
+   default:
+      _mesa_problem(NULL,
+		    "Unexpected format in st_new_renderbuffer_fb");
+      free(strb);
+      return NULL;
+   }
+
+   /* st-specific methods */
+   strb->Base.Delete = st_renderbuffer_delete;
+   strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
+   strb->Base.GetPointer = null_get_pointer;
+
+   /* surface is allocated in st_renderbuffer_alloc_storage() */
+   strb->surface = NULL;
+
+   return &strb->Base;
+}
+
+
+
+
+/**
+ * Called via ctx->Driver.BindFramebufferEXT().
+ */
+static void
+st_bind_framebuffer(struct gl_context *ctx, GLenum target,
+                    struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
+{
+
+}
+
+/**
+ * Called by ctx->Driver.FramebufferRenderbuffer
+ */
+static void
+st_framebuffer_renderbuffer(struct gl_context *ctx, 
+                            struct gl_framebuffer *fb,
+                            GLenum attachment,
+                            struct gl_renderbuffer *rb)
+{
+   /* XXX no need for derivation? */
+   _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
+}
+
+
+/**
+ * Called by ctx->Driver.RenderTexture
+ */
+static void
+st_render_texture(struct gl_context *ctx,
+                  struct gl_framebuffer *fb,
+                  struct gl_renderbuffer_attachment *att)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_context *pipe = st->pipe;
+   struct st_renderbuffer *strb;
+   struct gl_renderbuffer *rb;
+   struct pipe_resource *pt = st_get_texobj_resource(att->Texture);
+   struct st_texture_object *stObj;
+   const struct gl_texture_image *texImage;
+   struct pipe_surface surf_tmpl;
+
+   /* When would this fail?  Perhaps assert? */
+   if (!pt) 
+      return;
+
+   /* get pointer to texture image we're rendeing to */
+   texImage = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
+
+   /* create new renderbuffer which wraps the texture image */
+   rb = st_new_renderbuffer(ctx, 0);
+   if (!rb) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
+      return;
+   }
+
+   _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
+   assert(rb->RefCount == 1);
+   rb->AllocStorage = NULL; /* should not get called */
+   strb = st_renderbuffer(rb);
+
+   assert(strb->Base.RefCount > 0);
+
+   /* get the texture for the texture object */
+   stObj = st_texture_object(att->Texture);
+
+   /* point renderbuffer at texobject */
+   strb->rtt = stObj;
+   strb->rtt_level = att->TextureLevel;
+   strb->rtt_face = att->CubeMapFace;
+   strb->rtt_slice = att->Zoffset;
+
+   rb->Width = texImage->Width2;
+   rb->Height = texImage->Height2;
+   rb->_BaseFormat = texImage->_BaseFormat;
+   /*printf("***** render to texture level %d: %d x %d\n", att->TextureLevel, rb->Width, rb->Height);*/
+
+   /*printf("***** pipe texture %d x %d\n", pt->width0, pt->height0);*/
+
+   pipe_resource_reference( &strb->texture, pt );
+
+   pipe_surface_reference(&strb->surface, NULL);
+
+   pipe_sampler_view_reference(&strb->sampler_view,
+                               st_get_texture_sampler_view(stObj, pipe));
+
+   assert(strb->rtt_level <= strb->texture->last_level);
+
+   /* new surface for rendering into the texture */
+   memset(&surf_tmpl, 0, sizeof(surf_tmpl));
+   surf_tmpl.format = ctx->Color.sRGBEnabled ? strb->texture->format : util_format_linear(strb->texture->format);
+   surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
+   surf_tmpl.u.tex.level = strb->rtt_level;
+   surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice;
+   surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice;
+   strb->surface = pipe->create_surface(pipe,
+                                        strb->texture,
+                                        &surf_tmpl);
+
+   strb->format = pt->format;
+
+   strb->Base.Format = st_pipe_format_to_mesa_format(pt->format);
+   strb->Base.DataType = st_format_datatype(pt->format);
+
+   /*
+   printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p  %d x %d\n",
+          att->Texture, pt, strb->surface, rb->Width, rb->Height);
+   */
+
+   /* Invalidate buffer state so that the pipe's framebuffer state
+    * gets updated.
+    * That's where the new renderbuffer (which we just created) gets
+    * passed to the pipe as a (color/depth) render target.
+    */
+   st_invalidate_state(ctx, _NEW_BUFFERS);
+}
+
+
+/**
+ * Called via ctx->Driver.FinishRenderTexture.
+ */
+static void
+st_finish_render_texture(struct gl_context *ctx,
+                         struct gl_renderbuffer_attachment *att)
+{
+   struct st_context *st = st_context(ctx);
+   struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
+
+   if (!strb)
+      return;
+
+   st_flush(st, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+   strb->rtt = NULL;
+
+   /*
+   printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
+   */
+
+   /* restore previous framebuffer state */
+   st_invalidate_state(ctx, _NEW_BUFFERS);
+}
+
+
+/**
+ * Validate a renderbuffer attachment for a particular set of bindings.
+ */
+static GLboolean
+st_validate_attachment(struct gl_context *ctx,
+		       struct pipe_screen *screen,
+		       const struct gl_renderbuffer_attachment *att,
+		       unsigned bindings)
+{
+   const struct st_texture_object *stObj = st_texture_object(att->Texture);
+   enum pipe_format format;
+   gl_format texFormat;
+
+   /* Only validate texture attachments for now, since
+    * st_renderbuffer_alloc_storage makes sure that
+    * the format is supported.
+    */
+   if (att->Type != GL_TEXTURE)
+      return GL_TRUE;
+
+   if (!stObj)
+      return GL_FALSE;
+
+   format = stObj->pt->format;
+   texFormat =
+      stObj->base.Image[att->CubeMapFace][att->TextureLevel]->TexFormat;
+
+   /* If the encoding is sRGB and sRGB rendering cannot be enabled,
+    * check for linear format support instead.
+    * Later when we create a surface, we change the format to a linear one. */
+   if (!ctx->Const.sRGBCapable &&
+       _mesa_get_format_color_encoding(texFormat) == GL_SRGB) {
+      const gl_format linearFormat = _mesa_get_srgb_format_linear(texFormat);
+      format = st_mesa_format_to_pipe_format(linearFormat);
+   }
+
+   return screen->is_format_supported(screen, format,
+                                      PIPE_TEXTURE_2D,
+                                      stObj->pt->nr_samples, bindings, 0);
+}
+
+
+/**
+ * Check if two renderbuffer attachments name a combined depth/stencil
+ * renderbuffer.
+ */
+GLboolean
+st_is_depth_stencil_combined(const struct gl_renderbuffer_attachment *depth,
+                             const struct gl_renderbuffer_attachment *stencil)
+{
+   assert(depth && stencil);
+
+   if (depth->Type == stencil->Type) {
+      if (depth->Type == GL_RENDERBUFFER_EXT &&
+          depth->Renderbuffer == stencil->Renderbuffer)
+         return GL_TRUE;
+
+      if (depth->Type == GL_TEXTURE &&
+          depth->Texture == stencil->Texture)
+         return GL_TRUE;
+   }
+
+   return GL_FALSE;
+}
+ 
+
+/**
+ * Check that the framebuffer configuration is valid in terms of what
+ * the driver can support.
+ *
+ * For Gallium we only supports combined Z+stencil, not separate buffers.
+ */
+static void
+st_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
+{
+   struct st_context *st = st_context(ctx);
+   struct pipe_screen *screen = st->pipe->screen;
+   const struct gl_renderbuffer_attachment *depth =
+         &fb->Attachment[BUFFER_DEPTH];
+   const struct gl_renderbuffer_attachment *stencil =
+         &fb->Attachment[BUFFER_STENCIL];
+   GLuint i;
+
+   if (depth->Type && stencil->Type && depth->Type != stencil->Type) {
+      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+      return;
+   }
+   if (depth->Type == GL_RENDERBUFFER_EXT &&
+       stencil->Type == GL_RENDERBUFFER_EXT &&
+       depth->Renderbuffer != stencil->Renderbuffer) {
+      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+      return;
+   }
+   if (depth->Type == GL_TEXTURE &&
+       stencil->Type == GL_TEXTURE &&
+       depth->Texture != stencil->Texture) {
+      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+      return;
+   }
+
+   if (!st_validate_attachment(ctx,
+                               screen,
+                               depth,
+			       PIPE_BIND_DEPTH_STENCIL)) {
+      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+      return;
+   }
+   if (!st_validate_attachment(ctx,
+                               screen,
+                               stencil,
+			       PIPE_BIND_DEPTH_STENCIL)) {
+      fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+      return;
+   }
+   for (i = 0; i < ctx->Const.MaxColorAttachments; i++) {
+      if (!st_validate_attachment(ctx,
+                                  screen,
+				  &fb->Attachment[BUFFER_COLOR0 + i],
+				  PIPE_BIND_RENDER_TARGET)) {
+	 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+	 return;
+      }
+   }
+}
+
+
+/**
+ * Called via glDrawBuffer.
+ */
+static void
+st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers)
+{
+   struct st_context *st = st_context(ctx);
+   struct gl_framebuffer *fb = ctx->DrawBuffer;
+   GLuint i;
+
+   (void) count;
+   (void) buffers;
+
+   /* add the renderbuffers on demand */
+   for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
+      gl_buffer_index idx = fb->_ColorDrawBufferIndexes[i];
+      st_manager_add_color_renderbuffer(st, fb, idx);
+   }
+}
+
+
+/**
+ * Called via glReadBuffer.
+ */
+static void
+st_ReadBuffer(struct gl_context *ctx, GLenum buffer)
+{
+   struct st_context *st = st_context(ctx);
+   struct gl_framebuffer *fb = ctx->ReadBuffer;
+
+   (void) buffer;
+
+   /* add the renderbuffer on demand */
+   st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex);
+}
+
+
+void st_init_fbo_functions(struct dd_function_table *functions)
+{
+#if FEATURE_EXT_framebuffer_object
+   functions->NewFramebuffer = st_new_framebuffer;
+   functions->NewRenderbuffer = st_new_renderbuffer;
+   functions->BindFramebuffer = st_bind_framebuffer;
+   functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
+   functions->RenderTexture = st_render_texture;
+   functions->FinishRenderTexture = st_finish_render_texture;
+   functions->ValidateFramebuffer = st_validate_framebuffer;
+#endif
+   /* no longer needed by core Mesa, drivers handle resizes...
+   functions->ResizeBuffers = st_resize_buffers;
+   */
+
+   functions->DrawBuffers = st_DrawBuffers;
+   functions->ReadBuffer = st_ReadBuffer;
+}
+
+/* XXX unused ? */
+struct pipe_sampler_view *
+st_get_renderbuffer_sampler_view(struct st_renderbuffer *rb,
+                                 struct pipe_context *pipe)
+{
+   if (!rb->sampler_view) {
+      rb->sampler_view = st_create_texture_sampler_view(pipe, rb->texture);
+   }
+
+   return rb->sampler_view;
+}
diff --git a/mesalib/src/mesa/state_tracker/st_manager.c b/mesalib/src/mesa/state_tracker/st_manager.c
index 5684e9768..d85bcd4f7 100644
--- a/mesalib/src/mesa/state_tracker/st_manager.c
+++ b/mesalib/src/mesa/state_tracker/st_manager.c
@@ -1,922 +1,923 @@
-/*

- * Mesa 3-D graphics library

- * Version:  7.9

- *

- * Copyright (C) 2010 LunarG Inc.

- *

- * 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

- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

- * DEALINGS IN THE SOFTWARE.

- *

- * Authors:

- *    Chia-I Wu <olv@lunarg.com>

- */

-

-#include "state_tracker/st_gl_api.h"

-

-#include "pipe/p_context.h"

-#include "pipe/p_screen.h"

-#include "util/u_format.h"

-#include "util/u_pointer.h"

-#include "util/u_inlines.h"

-#include "util/u_atomic.h"

-#include "util/u_surface.h"

-

-#include "main/mtypes.h"

-#include "main/context.h"

-#include "main/mfeatures.h"

-#include "main/texobj.h"

-#include "main/teximage.h"

-#include "main/texstate.h"

-#include "main/framebuffer.h"

-#include "main/fbobject.h"

-#include "main/renderbuffer.h"

-#include "main/version.h"

-#include "st_texture.h"

-

-#include "st_context.h"

-#include "st_format.h"

-#include "st_cb_fbo.h"

-#include "st_cb_flush.h"

-#include "st_manager.h"

-

-/**

- * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.

- * Return NULL if the struct gl_framebuffer is a user-created framebuffer.

- * We'll only return non-null for window system framebuffers.

- * Note that this function may fail.

- */

-static INLINE struct st_framebuffer *

-st_ws_framebuffer(struct gl_framebuffer *fb)

-{

-   /* FBO cannot be casted.  See st_new_framebuffer */

-   return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL);

-}

-

-/**

- * Map an attachment to a buffer index.

- */

-static INLINE gl_buffer_index

-attachment_to_buffer_index(enum st_attachment_type statt)

-{

-   gl_buffer_index index;

-

-   switch (statt) {

-   case ST_ATTACHMENT_FRONT_LEFT:

-      index = BUFFER_FRONT_LEFT;

-      break;

-   case ST_ATTACHMENT_BACK_LEFT:

-      index = BUFFER_BACK_LEFT;

-      break;

-   case ST_ATTACHMENT_FRONT_RIGHT:

-      index = BUFFER_FRONT_RIGHT;

-      break;

-   case ST_ATTACHMENT_BACK_RIGHT:

-      index = BUFFER_BACK_RIGHT;

-      break;

-   case ST_ATTACHMENT_DEPTH_STENCIL:

-      index = BUFFER_DEPTH;

-      break;

-   case ST_ATTACHMENT_ACCUM:

-      index = BUFFER_ACCUM;

-      break;

-   case ST_ATTACHMENT_SAMPLE:

-   default:

-      index = BUFFER_COUNT;

-      break;

-   }

-

-   return index;

-}

-

-/**

- * Map a buffer index to an attachment.

- */

-static INLINE enum st_attachment_type

-buffer_index_to_attachment(gl_buffer_index index)

-{

-   enum st_attachment_type statt;

-

-   switch (index) {

-   case BUFFER_FRONT_LEFT:

-      statt = ST_ATTACHMENT_FRONT_LEFT;

-      break;

-   case BUFFER_BACK_LEFT:

-      statt = ST_ATTACHMENT_BACK_LEFT;

-      break;

-   case BUFFER_FRONT_RIGHT:

-      statt = ST_ATTACHMENT_FRONT_RIGHT;

-      break;

-   case BUFFER_BACK_RIGHT:

-      statt = ST_ATTACHMENT_BACK_RIGHT;

-      break;

-   case BUFFER_DEPTH:

-      statt = ST_ATTACHMENT_DEPTH_STENCIL;

-      break;

-   case BUFFER_ACCUM:

-      statt = ST_ATTACHMENT_ACCUM;

-      break;

-   default:

-      statt = ST_ATTACHMENT_INVALID;

-      break;

-   }

-

-   return statt;

-}

-

-/**

- * Validate a framebuffer to make sure up-to-date pipe_textures are used.

- */

-static void

-st_framebuffer_validate(struct st_framebuffer *stfb, struct st_context *st)

-{

-   struct pipe_context *pipe = st->pipe;

-   struct pipe_resource *textures[ST_ATTACHMENT_COUNT];

-   uint width, height;

-   unsigned i;

-   boolean changed = FALSE;

-

-   if (!p_atomic_read(&stfb->revalidate))

-      return;

-

-   /* validate the fb */

-   if (!stfb->iface->validate(stfb->iface, stfb->statts, stfb->num_statts, textures))

-      return;

-

-   width = stfb->Base.Width;

-   height = stfb->Base.Height;

-

-   for (i = 0; i < stfb->num_statts; i++) {

-      struct st_renderbuffer *strb;

-      struct pipe_surface *ps, surf_tmpl;

-      gl_buffer_index idx;

-

-      if (!textures[i])

-         continue;

-

-      idx = attachment_to_buffer_index(stfb->statts[i]);

-      if (idx >= BUFFER_COUNT) {

-         pipe_resource_reference(&textures[i], NULL);

-         continue;

-      }

-

-      strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);

-      assert(strb);

-      if (strb->texture == textures[i]) {

-         pipe_resource_reference(&textures[i], NULL);

-         continue;

-      }

-

-      memset(&surf_tmpl, 0, sizeof(surf_tmpl));

-      u_surface_default_template(&surf_tmpl, textures[i],

-                                 PIPE_BIND_RENDER_TARGET);

-      ps = pipe->create_surface(pipe, textures[i], &surf_tmpl);

-      if (ps) {

-         pipe_surface_reference(&strb->surface, ps);

-         pipe_resource_reference(&strb->texture, ps->texture);

-         /* ownership transfered */

-         pipe_surface_reference(&ps, NULL);

-

-         changed = TRUE;

-

-         strb->Base.Width = strb->surface->width;

-         strb->Base.Height = strb->surface->height;

-

-         width = strb->Base.Width;

-         height = strb->Base.Height;

-      }

-

-      pipe_resource_reference(&textures[i], NULL);

-   }

-

-   if (changed) {

-      st->dirty.st |= ST_NEW_FRAMEBUFFER;

-      _mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);

-

-      assert(stfb->Base.Width == width);

-      assert(stfb->Base.Height == height);

-   }

-

-   p_atomic_set(&stfb->revalidate, FALSE);

-}

-

-/**

- * Update the attachments to validate by looping the existing renderbuffers.

- */

-static void

-st_framebuffer_update_attachments(struct st_framebuffer *stfb)

-{

-   gl_buffer_index idx;

-

-   stfb->num_statts = 0;

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

-      struct st_renderbuffer *strb;

-      enum st_attachment_type statt;

-

-      strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);

-      if (!strb || strb->software)

-         continue;

-

-      statt = buffer_index_to_attachment(idx);

-      if (statt != ST_ATTACHMENT_INVALID &&

-          st_visual_have_buffers(stfb->iface->visual, 1 << statt))

-         stfb->statts[stfb->num_statts++] = statt;

-   }

-

-   p_atomic_set(&stfb->revalidate, TRUE);

-}

-

-/**

- * Add a renderbuffer to the framebuffer.

- */

-static boolean

-st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,

-                                gl_buffer_index idx)

-{

-   struct gl_renderbuffer *rb;

-   enum pipe_format format;

-   int samples;

-   boolean sw;

-

-   if (!stfb->iface)

-      return FALSE;

-

-   /* do not distinguish depth/stencil buffers */

-   if (idx == BUFFER_STENCIL)

-      idx = BUFFER_DEPTH;

-

-   switch (idx) {

-   case BUFFER_DEPTH:

-      format = stfb->iface->visual->depth_stencil_format;

-      sw = FALSE;

-      break;

-   case BUFFER_ACCUM:

-      format = stfb->iface->visual->accum_format;

-      sw = TRUE;

-      break;

-   default:

-      format = stfb->iface->visual->color_format;

-      sw = FALSE;

-      break;

-   }

-

-   if (format == PIPE_FORMAT_NONE)

-      return FALSE;

-

-   samples = stfb->iface->visual->samples;

-   if (!samples)

-      samples = st_get_msaa();

-

-   rb = st_new_renderbuffer_fb(format, samples, sw);

-   if (!rb)

-      return FALSE;

-

-   if (idx != BUFFER_DEPTH) {

-      _mesa_add_renderbuffer(&stfb->Base, idx, rb);

-   }

-   else {

-      if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0))

-         _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, rb);

-      if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1))

-         _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, rb);

-   }

-

-   return TRUE;

-}

-

-/**

- * Intialize a struct gl_config from a visual.

- */

-static void

-st_visual_to_context_mode(const struct st_visual *visual,

-                          struct gl_config *mode)

-{

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

-

-   if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))

-      mode->doubleBufferMode = GL_TRUE;

-   if (st_visual_have_buffers(visual,

-            ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))

-      mode->stereoMode = GL_TRUE;

-

-   if (visual->color_format != PIPE_FORMAT_NONE) {

-      mode->rgbMode = GL_TRUE;

-

-      mode->redBits =

-         util_format_get_component_bits(visual->color_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 0);

-      mode->greenBits =

-         util_format_get_component_bits(visual->color_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 1);

-      mode->blueBits =

-         util_format_get_component_bits(visual->color_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 2);

-      mode->alphaBits =

-         util_format_get_component_bits(visual->color_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 3);

-

-      mode->rgbBits = mode->redBits +

-         mode->greenBits + mode->blueBits + mode->alphaBits;

-   }

-

-   if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {

-      mode->depthBits =

-         util_format_get_component_bits(visual->depth_stencil_format,

-               UTIL_FORMAT_COLORSPACE_ZS, 0);

-      mode->stencilBits =

-         util_format_get_component_bits(visual->depth_stencil_format,

-               UTIL_FORMAT_COLORSPACE_ZS, 1);

-

-      mode->haveDepthBuffer = mode->depthBits > 0;

-      mode->haveStencilBuffer = mode->stencilBits > 0;

-   }

-

-   if (visual->accum_format != PIPE_FORMAT_NONE) {

-      mode->haveAccumBuffer = GL_TRUE;

-

-      mode->accumRedBits =

-         util_format_get_component_bits(visual->accum_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 0);

-      mode->accumGreenBits =

-         util_format_get_component_bits(visual->accum_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 1);

-      mode->accumBlueBits =

-         util_format_get_component_bits(visual->accum_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 2);

-      mode->accumAlphaBits =

-         util_format_get_component_bits(visual->accum_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 3);

-   }

-

-   if (visual->samples) {

-      mode->sampleBuffers = 1;

-      mode->samples = visual->samples;

-   }

-}

-

-/**

- * Determine the default draw or read buffer from a visual.

- */

-static void

-st_visual_to_default_buffer(const struct st_visual *visual,

-                            GLenum *buffer, GLint *index)

-{

-   enum st_attachment_type statt;

-   GLenum buf;

-   gl_buffer_index idx;

-

-   statt = visual->render_buffer;

-   /* do nothing if an invalid render buffer is specified */

-   if (statt == ST_ATTACHMENT_INVALID ||

-       !st_visual_have_buffers(visual, 1 << statt))

-      return;

-

-   switch (statt) {

-   case ST_ATTACHMENT_FRONT_LEFT:

-      buf = GL_FRONT_LEFT;

-      idx = BUFFER_FRONT_LEFT;

-      break;

-   case ST_ATTACHMENT_BACK_LEFT:

-      buf = GL_BACK_LEFT;

-      idx = BUFFER_BACK_LEFT;

-      break;

-   case ST_ATTACHMENT_FRONT_RIGHT:

-      buf = GL_FRONT_RIGHT;

-      idx = BUFFER_FRONT_RIGHT;

-      break;

-   case ST_ATTACHMENT_BACK_RIGHT:

-      buf = GL_BACK_RIGHT;

-      idx = BUFFER_BACK_RIGHT;

-      break;

-   default:

-      buf = GL_NONE;

-      idx = BUFFER_COUNT;

-      break;

-   }

-

-   if (buf != GL_NONE) {

-      if (buffer)

-         *buffer = buf;

-      if (index)

-         *index = idx;

-   }

-}

-

-/**

- * Create a framebuffer from a manager interface.

- */

-static struct st_framebuffer *

-st_framebuffer_create(struct st_framebuffer_iface *stfbi)

-{

-   struct st_framebuffer *stfb;

-   struct gl_config mode;

-   gl_buffer_index idx;

-

-   if (!stfbi)

-      return NULL;

-

-   stfb = CALLOC_STRUCT(st_framebuffer);

-   if (!stfb)

-      return NULL;

-

-   st_visual_to_context_mode(stfbi->visual, &mode);

-   _mesa_initialize_window_framebuffer(&stfb->Base, &mode);

-

-   /* modify the draw/read buffers of the fb */

-   st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorDrawBuffer[0],

-         &stfb->Base._ColorDrawBufferIndexes[0]);

-   st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorReadBuffer,

-         &stfb->Base._ColorReadBufferIndex);

-

-   stfb->iface = stfbi;

-

-   /* add the color buffer */

-   idx = stfb->Base._ColorDrawBufferIndexes[0];

-   if (!st_framebuffer_add_renderbuffer(stfb, idx)) {

-      FREE(stfb);

-      return NULL;

-   }

-

-   st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);

-   st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);

-

-   st_framebuffer_update_attachments(stfb);

-

-   stfb->Base.Initialized = GL_TRUE;

-

-   return stfb;

-}

-

-/**

- * Reference a framebuffer.

- */

-static void

-st_framebuffer_reference(struct st_framebuffer **ptr,

-                         struct st_framebuffer *stfb)

-{

-   struct gl_framebuffer *fb = &stfb->Base;

-   _mesa_reference_framebuffer((struct gl_framebuffer **) ptr, fb);

-}

-

-static void

-st_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,

-                                      struct st_framebuffer_iface *stfbi)

-{

-   struct st_context *st = (struct st_context *) stctxi;

-   struct st_framebuffer *stfb;

-

-   /* either draw or read winsys fb */

-   stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);

-   if (!stfb || stfb->iface != stfbi)

-      stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);

-

-   if (stfb && stfb->iface == stfbi) {

-      p_atomic_set(&stfb->revalidate, TRUE);

-   }

-   else {

-      /* This function is probably getting called when we've detected a

-       * change in a window's size but the currently bound context is

-       * not bound to that window.

-       * If the st_framebuffer_iface structure had a pointer to the

-       * corresponding st_framebuffer we'd be able to handle this.

-       */

-   }

-}

-

-static void

-st_context_flush(struct st_context_iface *stctxi, unsigned flags,

-                 struct pipe_fence_handle **fence)

-{

-   struct st_context *st = (struct st_context *) stctxi;

-   st_flush(st, flags, fence);

-   if (flags & PIPE_FLUSH_RENDER_CACHE)

-      st_manager_flush_frontbuffer(st);

-}

-

-static boolean

-st_context_teximage(struct st_context_iface *stctxi,

-                    enum st_texture_type target,

-                    int level, enum pipe_format internal_format,

-                    struct pipe_resource *tex, boolean mipmap)

-{

-   struct st_context *st = (struct st_context *) stctxi;

-   struct gl_context *ctx = st->ctx;

-   struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);

-   struct gl_texture_object *texObj;

-   struct gl_texture_image *texImage;

-   struct st_texture_object *stObj;

-   struct st_texture_image *stImage;

-   GLenum internalFormat;

-   GLuint width, height, depth;

-

-   switch (target) {

-   case ST_TEXTURE_1D:

-      target = GL_TEXTURE_1D;

-      break;

-   case ST_TEXTURE_2D:

-      target = GL_TEXTURE_2D;

-      break;

-   case ST_TEXTURE_3D:

-      target = GL_TEXTURE_3D;

-      break;

-   case ST_TEXTURE_RECT:

-      target = GL_TEXTURE_RECTANGLE_ARB;

-      break;

-   default:

-      return FALSE;

-      break;

-   }

-

-   texObj = _mesa_select_tex_object(ctx, texUnit, target);

-   _mesa_lock_texture(ctx, texObj);

-

-   stObj = st_texture_object(texObj);

-   /* switch to surface based */

-   if (!stObj->surface_based) {

-      _mesa_clear_texture_object(ctx, texObj);

-      stObj->surface_based = GL_TRUE;

-   }

-

-   texImage = _mesa_get_tex_image(ctx, texObj, target, level);

-   stImage = st_texture_image(texImage);

-   if (tex) {

-      gl_format texFormat;

-

-      /*

-       * XXX When internal_format and tex->format differ, st_finalize_texture

-       * needs to allocate a new texture with internal_format and copy the

-       * texture here into the new one.  It will result in surface_copy being

-       * called on surfaces whose formats differ.

-       *

-       * To avoid that, internal_format is (wrongly) ignored here.  A sane fix

-       * is to use a sampler view.

-       */

-      if (!st_sampler_compat_formats(tex->format, internal_format))

-	 internal_format = tex->format;

-     

-      if (util_format_get_component_bits(internal_format,

-               UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)

-         internalFormat = GL_RGBA;

-      else

-         internalFormat = GL_RGB;

-

-      texFormat = st_ChooseTextureFormat(ctx, internalFormat,

-                                         GL_RGBA, GL_UNSIGNED_BYTE);

-

-      _mesa_init_teximage_fields(ctx, target, texImage,

-                                 tex->width0, tex->height0, 1, 0,

-                                 internalFormat, texFormat);

-

-      width = tex->width0;

-      height = tex->height0;

-      depth = tex->depth0;

-

-      /* grow the image size until we hit level = 0 */

-      while (level > 0) {

-         if (width != 1)

-            width <<= 1;

-         if (height != 1)

-            height <<= 1;

-         if (depth != 1)

-            depth <<= 1;

-         level--;

-      }

-   }

-   else {

-      _mesa_clear_texture_image(ctx, texImage);

-      width = height = depth = 0;

-   }

-

-   pipe_resource_reference(&stImage->pt, tex);

-   stObj->width0 = width;

-   stObj->height0 = height;

-   stObj->depth0 = depth;

-

-   _mesa_dirty_texobj(ctx, texObj, GL_TRUE);

-   _mesa_unlock_texture(ctx, texObj);

-   

-   return TRUE;

-}

-

-static void

-st_context_copy(struct st_context_iface *stctxi,

-                struct st_context_iface *stsrci, unsigned mask)

-{

-   struct st_context *st = (struct st_context *) stctxi;

-   struct st_context *src = (struct st_context *) stsrci;

-

-   _mesa_copy_context(src->ctx, st->ctx, mask);

-}

-

-static boolean

-st_context_share(struct st_context_iface *stctxi,

-                 struct st_context_iface *stsrci)

-{

-   struct st_context *st = (struct st_context *) stctxi;

-   struct st_context *src = (struct st_context *) stsrci;

-

-   return _mesa_share_state(st->ctx, src->ctx);

-}

-

-static void

-st_context_destroy(struct st_context_iface *stctxi)

-{

-   struct st_context *st = (struct st_context *) stctxi;

-   st_destroy_context(st);

-}

-

-static struct st_context_iface *

-st_api_create_context(struct st_api *stapi, struct st_manager *smapi,

-                      const struct st_context_attribs *attribs,

-                      struct st_context_iface *shared_stctxi)

-{

-   struct st_context *shared_ctx = (struct st_context *) shared_stctxi;

-   struct st_context *st;

-   struct pipe_context *pipe;

-   struct gl_config mode;

-   gl_api api;

-

-   if (!(stapi->profile_mask & (1 << attribs->profile)))

-      return NULL;

-

-   switch (attribs->profile) {

-   case ST_PROFILE_DEFAULT:

-      api = API_OPENGL;

-      break;

-   case ST_PROFILE_OPENGL_ES1:

-      api = API_OPENGLES;

-      break;

-   case ST_PROFILE_OPENGL_ES2:

-      api = API_OPENGLES2;

-      break;

-   case ST_PROFILE_OPENGL_CORE:

-   default:

-      return NULL;

-      break;

-   }

-

-   pipe = smapi->screen->context_create(smapi->screen, NULL);

-   if (!pipe)

-      return NULL;

-

-   st_visual_to_context_mode(&attribs->visual, &mode);

-   st = st_create_context(api, pipe, &mode, shared_ctx);

-   if (!st) {

-      pipe->destroy(pipe);

-      return NULL;

-   }

-

-   /* need to perform version check */

-   if (attribs->major > 1 || attribs->minor > 0) {

-      _mesa_compute_version(st->ctx);

-

-      if (st->ctx->VersionMajor < attribs->major ||

-          st->ctx->VersionMajor < attribs->minor) {

-         st_destroy_context(st);

-         return NULL;

-      }

-   }

-

-   st->invalidate_on_gl_viewport =

-      smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);

-

-   st->iface.destroy = st_context_destroy;

-   st->iface.notify_invalid_framebuffer =

-      st_context_notify_invalid_framebuffer;

-   st->iface.flush = st_context_flush;

-   st->iface.teximage = st_context_teximage;

-   st->iface.copy = st_context_copy;

-   st->iface.share = st_context_share;

-   st->iface.st_context_private = (void *) smapi;

-

-   return &st->iface;

-}

-

-static boolean

-st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,

-                    struct st_framebuffer_iface *stdrawi,

-                    struct st_framebuffer_iface *streadi)

-{

-   struct st_context *st = (struct st_context *) stctxi;

-   struct st_framebuffer *stdraw, *stread, *stfb;

-   boolean ret;

-

-   _glapi_check_multithread();

-

-   if (st) {

-      /* reuse/create the draw fb */

-      stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);

-      if (stfb && stfb->iface == stdrawi) {

-         stdraw = NULL;

-         st_framebuffer_reference(&stdraw, stfb);

-      }

-      else {

-         stdraw = st_framebuffer_create(stdrawi);

-      }

-

-      /* reuse/create the read fb */

-      stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);

-      if (!stfb || stfb->iface != streadi)

-         stfb = stdraw;

-      if (stfb && stfb->iface == streadi) {

-         stread = NULL;

-         st_framebuffer_reference(&stread, stfb);

-      }

-      else {

-         stread = st_framebuffer_create(streadi);

-      }

-

-      if (stdraw && stread) {

-         st_framebuffer_validate(stdraw, st);

-         if (stread != stdraw)

-            st_framebuffer_validate(stread, st);

-

-         /* modify the draw/read buffers of the context */

-         if (stdraw->iface) {

-            st_visual_to_default_buffer(stdraw->iface->visual,

-                  &st->ctx->Color.DrawBuffer[0], NULL);

-         }

-         if (stread->iface) {

-            st_visual_to_default_buffer(stread->iface->visual,

-                  &st->ctx->Pixel.ReadBuffer, NULL);

-         }

-

-         ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);

-      }

-      else {

-         struct gl_framebuffer *incomplete = _mesa_get_incomplete_framebuffer();

-         ret = _mesa_make_current(st->ctx, incomplete, incomplete);

-      }

-

-      st_framebuffer_reference(&stdraw, NULL);

-      st_framebuffer_reference(&stread, NULL);

-   }

-   else {

-      ret = _mesa_make_current(NULL, NULL, NULL);

-   }

-

-   return ret;

-}

-

-static struct st_context_iface *

-st_api_get_current(struct st_api *stapi)

-{

-   GET_CURRENT_CONTEXT(ctx);

-   struct st_context *st = (ctx) ? ctx->st : NULL;

-

-   return (st) ? &st->iface : NULL;

-}

-

-static st_proc_t

-st_api_get_proc_address(struct st_api *stapi, const char *procname)

-{

-   return (st_proc_t) _glapi_get_proc_address(procname);

-}

-

-static void

-st_api_destroy(struct st_api *stapi)

-{

-}

-

-/**

- * Flush the front buffer if the current context renders to the front buffer.

- */

-void

-st_manager_flush_frontbuffer(struct st_context *st)

-{

-   struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);

-   struct st_renderbuffer *strb = NULL;

-

-   if (stfb)

-      strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);

-   if (!strb)

-      return;

-

-   /* never a dummy fb */

-   assert(stfb->iface);

-   stfb->iface->flush_front(stfb->iface, ST_ATTACHMENT_FRONT_LEFT);

-}

-

-/**

- * Return the surface of an EGLImage.

- * FIXME: I think this should operate on resources, not surfaces

- */

-struct pipe_surface *

-st_manager_get_egl_image_surface(struct st_context *st,

-                                 void *eglimg, unsigned usage)

-{

-   struct st_manager *smapi =

-      (struct st_manager *) st->iface.st_context_private;

-   struct st_egl_image stimg;

-   struct pipe_surface *ps, surf_tmpl;

-

-   if (!smapi || !smapi->get_egl_image)

-      return NULL;

-

-   memset(&stimg, 0, sizeof(stimg));

-   if (!smapi->get_egl_image(smapi, eglimg, &stimg))

-      return NULL;

-

-   memset(&surf_tmpl, 0, sizeof(surf_tmpl));

-   surf_tmpl.format = stimg.texture->format;

-   surf_tmpl.usage = usage;

-   surf_tmpl.u.tex.level = stimg.level;

-   surf_tmpl.u.tex.first_layer = stimg.layer;

-   surf_tmpl.u.tex.last_layer = stimg.layer;

-   ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);

-   pipe_resource_reference(&stimg.texture, NULL);

-

-   return ps;

-}

-

-/**

- * Re-validate the framebuffers.

- */

-void

-st_manager_validate_framebuffers(struct st_context *st)

-{

-   struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);

-   struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);

-

-   if (stdraw)

-      st_framebuffer_validate(stdraw, st);

-   if (stread && stread != stdraw)

-      st_framebuffer_validate(stread, st);

-}

-

-/**

- * Add a color renderbuffer on demand.

- */

-boolean

-st_manager_add_color_renderbuffer(struct st_context *st,

-                                  struct gl_framebuffer *fb,

-                                  gl_buffer_index idx)

-{

-   struct st_framebuffer *stfb = st_ws_framebuffer(fb);

-

-   /* FBO */

-   if (!stfb)

-      return FALSE;

-

-   if (stfb->Base.Attachment[idx].Renderbuffer)

-      return TRUE;

-

-   switch (idx) {

-   case BUFFER_FRONT_LEFT:

-   case BUFFER_BACK_LEFT:

-   case BUFFER_FRONT_RIGHT:

-   case BUFFER_BACK_RIGHT:

-      break;

-   default:

-      return FALSE;

-      break;

-   }

-

-   if (!st_framebuffer_add_renderbuffer(stfb, idx))

-      return FALSE;

-

-   st_framebuffer_update_attachments(stfb);

-   st_invalidate_state(st->ctx, _NEW_BUFFERS);

-

-   return TRUE;

-}

-

-static const struct st_api st_gl_api = {

-   "Mesa " MESA_VERSION_STRING,

-   ST_API_OPENGL,

-#if FEATURE_GL

-   ST_PROFILE_DEFAULT_MASK |

-#endif

-#if FEATURE_ES1

-   ST_PROFILE_OPENGL_ES1_MASK |

-#endif

-#if FEATURE_ES2

-   ST_PROFILE_OPENGL_ES2_MASK |

-#endif

-   0,

-   st_api_destroy,

-   st_api_get_proc_address,

-   st_api_create_context,

-   st_api_make_current,

-   st_api_get_current,

-};

-

-struct st_api *

-st_gl_api_create(void)

-{

-   return (struct st_api *) &st_gl_api;

-}

+/*
+ * Mesa 3-D graphics library
+ * Version:  7.9
+ *
+ * Copyright (C) 2010 LunarG Inc.
+ *
+ * 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "state_tracker/st_gl_api.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_screen.h"
+#include "util/u_format.h"
+#include "util/u_pointer.h"
+#include "util/u_inlines.h"
+#include "util/u_atomic.h"
+#include "util/u_surface.h"
+
+#include "main/mtypes.h"
+#include "main/context.h"
+#include "main/mfeatures.h"
+#include "main/texobj.h"
+#include "main/teximage.h"
+#include "main/texstate.h"
+#include "main/framebuffer.h"
+#include "main/fbobject.h"
+#include "main/renderbuffer.h"
+#include "main/version.h"
+#include "st_texture.h"
+
+#include "st_context.h"
+#include "st_format.h"
+#include "st_cb_fbo.h"
+#include "st_cb_flush.h"
+#include "st_manager.h"
+
+/**
+ * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.
+ * Return NULL if the struct gl_framebuffer is a user-created framebuffer.
+ * We'll only return non-null for window system framebuffers.
+ * Note that this function may fail.
+ */
+static INLINE struct st_framebuffer *
+st_ws_framebuffer(struct gl_framebuffer *fb)
+{
+   /* FBO cannot be casted.  See st_new_framebuffer */
+   return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL);
+}
+
+/**
+ * Map an attachment to a buffer index.
+ */
+static INLINE gl_buffer_index
+attachment_to_buffer_index(enum st_attachment_type statt)
+{
+   gl_buffer_index index;
+
+   switch (statt) {
+   case ST_ATTACHMENT_FRONT_LEFT:
+      index = BUFFER_FRONT_LEFT;
+      break;
+   case ST_ATTACHMENT_BACK_LEFT:
+      index = BUFFER_BACK_LEFT;
+      break;
+   case ST_ATTACHMENT_FRONT_RIGHT:
+      index = BUFFER_FRONT_RIGHT;
+      break;
+   case ST_ATTACHMENT_BACK_RIGHT:
+      index = BUFFER_BACK_RIGHT;
+      break;
+   case ST_ATTACHMENT_DEPTH_STENCIL:
+      index = BUFFER_DEPTH;
+      break;
+   case ST_ATTACHMENT_ACCUM:
+      index = BUFFER_ACCUM;
+      break;
+   case ST_ATTACHMENT_SAMPLE:
+   default:
+      index = BUFFER_COUNT;
+      break;
+   }
+
+   return index;
+}
+
+/**
+ * Map a buffer index to an attachment.
+ */
+static INLINE enum st_attachment_type
+buffer_index_to_attachment(gl_buffer_index index)
+{
+   enum st_attachment_type statt;
+
+   switch (index) {
+   case BUFFER_FRONT_LEFT:
+      statt = ST_ATTACHMENT_FRONT_LEFT;
+      break;
+   case BUFFER_BACK_LEFT:
+      statt = ST_ATTACHMENT_BACK_LEFT;
+      break;
+   case BUFFER_FRONT_RIGHT:
+      statt = ST_ATTACHMENT_FRONT_RIGHT;
+      break;
+   case BUFFER_BACK_RIGHT:
+      statt = ST_ATTACHMENT_BACK_RIGHT;
+      break;
+   case BUFFER_DEPTH:
+      statt = ST_ATTACHMENT_DEPTH_STENCIL;
+      break;
+   case BUFFER_ACCUM:
+      statt = ST_ATTACHMENT_ACCUM;
+      break;
+   default:
+      statt = ST_ATTACHMENT_INVALID;
+      break;
+   }
+
+   return statt;
+}
+
+/**
+ * Validate a framebuffer to make sure up-to-date pipe_textures are used.
+ */
+static void
+st_framebuffer_validate(struct st_framebuffer *stfb, struct st_context *st)
+{
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
+   uint width, height;
+   unsigned i;
+   boolean changed = FALSE;
+
+   if (!p_atomic_read(&stfb->revalidate))
+      return;
+
+   /* validate the fb */
+   if (!stfb->iface->validate(stfb->iface, stfb->statts, stfb->num_statts, textures))
+      return;
+
+   width = stfb->Base.Width;
+   height = stfb->Base.Height;
+
+   for (i = 0; i < stfb->num_statts; i++) {
+      struct st_renderbuffer *strb;
+      struct pipe_surface *ps, surf_tmpl;
+      gl_buffer_index idx;
+
+      if (!textures[i])
+         continue;
+
+      idx = attachment_to_buffer_index(stfb->statts[i]);
+      if (idx >= BUFFER_COUNT) {
+         pipe_resource_reference(&textures[i], NULL);
+         continue;
+      }
+
+      strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
+      assert(strb);
+      if (strb->texture == textures[i]) {
+         pipe_resource_reference(&textures[i], NULL);
+         continue;
+      }
+
+      memset(&surf_tmpl, 0, sizeof(surf_tmpl));
+      u_surface_default_template(&surf_tmpl, textures[i],
+                                 PIPE_BIND_RENDER_TARGET);
+      ps = pipe->create_surface(pipe, textures[i], &surf_tmpl);
+      if (ps) {
+         pipe_surface_reference(&strb->surface, ps);
+         pipe_resource_reference(&strb->texture, ps->texture);
+         /* ownership transfered */
+         pipe_surface_reference(&ps, NULL);
+
+         changed = TRUE;
+
+         strb->Base.Width = strb->surface->width;
+         strb->Base.Height = strb->surface->height;
+
+         width = strb->Base.Width;
+         height = strb->Base.Height;
+      }
+
+      pipe_resource_reference(&textures[i], NULL);
+   }
+
+   if (changed) {
+      st->dirty.st |= ST_NEW_FRAMEBUFFER;
+      _mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);
+
+      assert(stfb->Base.Width == width);
+      assert(stfb->Base.Height == height);
+   }
+
+   p_atomic_set(&stfb->revalidate, FALSE);
+}
+
+/**
+ * Update the attachments to validate by looping the existing renderbuffers.
+ */
+static void
+st_framebuffer_update_attachments(struct st_framebuffer *stfb)
+{
+   gl_buffer_index idx;
+
+   stfb->num_statts = 0;
+   for (idx = 0; idx < BUFFER_COUNT; idx++) {
+      struct st_renderbuffer *strb;
+      enum st_attachment_type statt;
+
+      strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
+      if (!strb || strb->software)
+         continue;
+
+      statt = buffer_index_to_attachment(idx);
+      if (statt != ST_ATTACHMENT_INVALID &&
+          st_visual_have_buffers(stfb->iface->visual, 1 << statt))
+         stfb->statts[stfb->num_statts++] = statt;
+   }
+
+   p_atomic_set(&stfb->revalidate, TRUE);
+}
+
+/**
+ * Add a renderbuffer to the framebuffer.
+ */
+static boolean
+st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,
+                                gl_buffer_index idx)
+{
+   struct gl_renderbuffer *rb;
+   enum pipe_format format;
+   int samples;
+   boolean sw;
+
+   if (!stfb->iface)
+      return FALSE;
+
+   /* do not distinguish depth/stencil buffers */
+   if (idx == BUFFER_STENCIL)
+      idx = BUFFER_DEPTH;
+
+   switch (idx) {
+   case BUFFER_DEPTH:
+      format = stfb->iface->visual->depth_stencil_format;
+      sw = FALSE;
+      break;
+   case BUFFER_ACCUM:
+      format = stfb->iface->visual->accum_format;
+      sw = TRUE;
+      break;
+   default:
+      format = stfb->iface->visual->color_format;
+      sw = FALSE;
+      break;
+   }
+
+   if (format == PIPE_FORMAT_NONE)
+      return FALSE;
+
+   samples = stfb->iface->visual->samples;
+   if (!samples)
+      samples = st_get_msaa();
+
+   rb = st_new_renderbuffer_fb(format, samples, sw);
+   if (!rb)
+      return FALSE;
+
+   if (idx != BUFFER_DEPTH) {
+      _mesa_add_renderbuffer(&stfb->Base, idx, rb);
+   }
+   else {
+      if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0))
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, rb);
+      if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1))
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, rb);
+   }
+
+   return TRUE;
+}
+
+/**
+ * Intialize a struct gl_config from a visual.
+ */
+static void
+st_visual_to_context_mode(const struct st_visual *visual,
+                          struct gl_config *mode)
+{
+   memset(mode, 0, sizeof(*mode));
+
+   if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))
+      mode->doubleBufferMode = GL_TRUE;
+   if (st_visual_have_buffers(visual,
+            ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))
+      mode->stereoMode = GL_TRUE;
+
+   if (visual->color_format != PIPE_FORMAT_NONE) {
+      mode->rgbMode = GL_TRUE;
+
+      mode->redBits =
+         util_format_get_component_bits(visual->color_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 0);
+      mode->greenBits =
+         util_format_get_component_bits(visual->color_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 1);
+      mode->blueBits =
+         util_format_get_component_bits(visual->color_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 2);
+      mode->alphaBits =
+         util_format_get_component_bits(visual->color_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 3);
+
+      mode->rgbBits = mode->redBits +
+         mode->greenBits + mode->blueBits + mode->alphaBits;
+   }
+
+   if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {
+      mode->depthBits =
+         util_format_get_component_bits(visual->depth_stencil_format,
+               UTIL_FORMAT_COLORSPACE_ZS, 0);
+      mode->stencilBits =
+         util_format_get_component_bits(visual->depth_stencil_format,
+               UTIL_FORMAT_COLORSPACE_ZS, 1);
+
+      mode->haveDepthBuffer = mode->depthBits > 0;
+      mode->haveStencilBuffer = mode->stencilBits > 0;
+   }
+
+   if (visual->accum_format != PIPE_FORMAT_NONE) {
+      mode->haveAccumBuffer = GL_TRUE;
+
+      mode->accumRedBits =
+         util_format_get_component_bits(visual->accum_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 0);
+      mode->accumGreenBits =
+         util_format_get_component_bits(visual->accum_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 1);
+      mode->accumBlueBits =
+         util_format_get_component_bits(visual->accum_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 2);
+      mode->accumAlphaBits =
+         util_format_get_component_bits(visual->accum_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 3);
+   }
+
+   if (visual->samples) {
+      mode->sampleBuffers = 1;
+      mode->samples = visual->samples;
+   }
+}
+
+/**
+ * Determine the default draw or read buffer from a visual.
+ */
+static void
+st_visual_to_default_buffer(const struct st_visual *visual,
+                            GLenum *buffer, GLint *index)
+{
+   enum st_attachment_type statt;
+   GLenum buf;
+   gl_buffer_index idx;
+
+   statt = visual->render_buffer;
+   /* do nothing if an invalid render buffer is specified */
+   if (statt == ST_ATTACHMENT_INVALID ||
+       !st_visual_have_buffers(visual, 1 << statt))
+      return;
+
+   switch (statt) {
+   case ST_ATTACHMENT_FRONT_LEFT:
+      buf = GL_FRONT_LEFT;
+      idx = BUFFER_FRONT_LEFT;
+      break;
+   case ST_ATTACHMENT_BACK_LEFT:
+      buf = GL_BACK_LEFT;
+      idx = BUFFER_BACK_LEFT;
+      break;
+   case ST_ATTACHMENT_FRONT_RIGHT:
+      buf = GL_FRONT_RIGHT;
+      idx = BUFFER_FRONT_RIGHT;
+      break;
+   case ST_ATTACHMENT_BACK_RIGHT:
+      buf = GL_BACK_RIGHT;
+      idx = BUFFER_BACK_RIGHT;
+      break;
+   default:
+      buf = GL_NONE;
+      idx = BUFFER_COUNT;
+      break;
+   }
+
+   if (buf != GL_NONE) {
+      if (buffer)
+         *buffer = buf;
+      if (index)
+         *index = idx;
+   }
+}
+
+/**
+ * Create a framebuffer from a manager interface.
+ */
+static struct st_framebuffer *
+st_framebuffer_create(struct st_framebuffer_iface *stfbi)
+{
+   struct st_framebuffer *stfb;
+   struct gl_config mode;
+   gl_buffer_index idx;
+
+   if (!stfbi)
+      return NULL;
+
+   stfb = CALLOC_STRUCT(st_framebuffer);
+   if (!stfb)
+      return NULL;
+
+   st_visual_to_context_mode(stfbi->visual, &mode);
+   _mesa_initialize_window_framebuffer(&stfb->Base, &mode);
+
+   /* modify the draw/read buffers of the fb */
+   st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorDrawBuffer[0],
+         &stfb->Base._ColorDrawBufferIndexes[0]);
+   st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorReadBuffer,
+         &stfb->Base._ColorReadBufferIndex);
+
+   stfb->iface = stfbi;
+
+   /* add the color buffer */
+   idx = stfb->Base._ColorDrawBufferIndexes[0];
+   if (!st_framebuffer_add_renderbuffer(stfb, idx)) {
+      FREE(stfb);
+      return NULL;
+   }
+
+   st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);
+   st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);
+
+   st_framebuffer_update_attachments(stfb);
+
+   stfb->Base.Initialized = GL_TRUE;
+
+   return stfb;
+}
+
+/**
+ * Reference a framebuffer.
+ */
+static void
+st_framebuffer_reference(struct st_framebuffer **ptr,
+                         struct st_framebuffer *stfb)
+{
+   struct gl_framebuffer *fb = &stfb->Base;
+   _mesa_reference_framebuffer((struct gl_framebuffer **) ptr, fb);
+}
+
+static void
+st_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
+                                      struct st_framebuffer_iface *stfbi)
+{
+   struct st_context *st = (struct st_context *) stctxi;
+   struct st_framebuffer *stfb;
+
+   /* either draw or read winsys fb */
+   stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);
+   if (!stfb || stfb->iface != stfbi)
+      stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);
+
+   if (stfb && stfb->iface == stfbi) {
+      p_atomic_set(&stfb->revalidate, TRUE);
+   }
+   else {
+      /* This function is probably getting called when we've detected a
+       * change in a window's size but the currently bound context is
+       * not bound to that window.
+       * If the st_framebuffer_iface structure had a pointer to the
+       * corresponding st_framebuffer we'd be able to handle this.
+       */
+   }
+}
+
+static void
+st_context_flush(struct st_context_iface *stctxi, unsigned flags,
+                 struct pipe_fence_handle **fence)
+{
+   struct st_context *st = (struct st_context *) stctxi;
+   st_flush(st, flags, fence);
+   if (flags & PIPE_FLUSH_RENDER_CACHE)
+      st_manager_flush_frontbuffer(st);
+}
+
+static boolean
+st_context_teximage(struct st_context_iface *stctxi,
+                    enum st_texture_type target,
+                    int level, enum pipe_format internal_format,
+                    struct pipe_resource *tex, boolean mipmap)
+{
+   struct st_context *st = (struct st_context *) stctxi;
+   struct gl_context *ctx = st->ctx;
+   struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   struct st_texture_object *stObj;
+   struct st_texture_image *stImage;
+   GLenum internalFormat;
+   GLuint width, height, depth;
+
+   switch (target) {
+   case ST_TEXTURE_1D:
+      target = GL_TEXTURE_1D;
+      break;
+   case ST_TEXTURE_2D:
+      target = GL_TEXTURE_2D;
+      break;
+   case ST_TEXTURE_3D:
+      target = GL_TEXTURE_3D;
+      break;
+   case ST_TEXTURE_RECT:
+      target = GL_TEXTURE_RECTANGLE_ARB;
+      break;
+   default:
+      return FALSE;
+      break;
+   }
+
+   texObj = _mesa_select_tex_object(ctx, texUnit, target);
+   _mesa_lock_texture(ctx, texObj);
+
+   stObj = st_texture_object(texObj);
+   /* switch to surface based */
+   if (!stObj->surface_based) {
+      _mesa_clear_texture_object(ctx, texObj);
+      stObj->surface_based = GL_TRUE;
+   }
+
+   texImage = _mesa_get_tex_image(ctx, texObj, target, level);
+   stImage = st_texture_image(texImage);
+   if (tex) {
+      gl_format texFormat;
+
+      /*
+       * XXX When internal_format and tex->format differ, st_finalize_texture
+       * needs to allocate a new texture with internal_format and copy the
+       * texture here into the new one.  It will result in surface_copy being
+       * called on surfaces whose formats differ.
+       *
+       * To avoid that, internal_format is (wrongly) ignored here.  A sane fix
+       * is to use a sampler view.
+       */
+      if (!st_sampler_compat_formats(tex->format, internal_format))
+	 internal_format = tex->format;
+     
+      if (util_format_get_component_bits(internal_format,
+               UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
+         internalFormat = GL_RGBA;
+      else
+         internalFormat = GL_RGB;
+
+      texFormat = st_ChooseTextureFormat(ctx, internalFormat,
+                                         GL_RGBA, GL_UNSIGNED_BYTE);
+
+      _mesa_init_teximage_fields(ctx, target, texImage,
+                                 tex->width0, tex->height0, 1, 0,
+                                 internalFormat, texFormat);
+
+      width = tex->width0;
+      height = tex->height0;
+      depth = tex->depth0;
+
+      /* grow the image size until we hit level = 0 */
+      while (level > 0) {
+         if (width != 1)
+            width <<= 1;
+         if (height != 1)
+            height <<= 1;
+         if (depth != 1)
+            depth <<= 1;
+         level--;
+      }
+   }
+   else {
+      _mesa_clear_texture_image(ctx, texImage);
+      width = height = depth = 0;
+   }
+
+   pipe_resource_reference(&stImage->pt, tex);
+   stObj->width0 = width;
+   stObj->height0 = height;
+   stObj->depth0 = depth;
+
+   _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
+   _mesa_unlock_texture(ctx, texObj);
+   
+   return TRUE;
+}
+
+static void
+st_context_copy(struct st_context_iface *stctxi,
+                struct st_context_iface *stsrci, unsigned mask)
+{
+   struct st_context *st = (struct st_context *) stctxi;
+   struct st_context *src = (struct st_context *) stsrci;
+
+   _mesa_copy_context(src->ctx, st->ctx, mask);
+}
+
+static boolean
+st_context_share(struct st_context_iface *stctxi,
+                 struct st_context_iface *stsrci)
+{
+   struct st_context *st = (struct st_context *) stctxi;
+   struct st_context *src = (struct st_context *) stsrci;
+
+   return _mesa_share_state(st->ctx, src->ctx);
+}
+
+static void
+st_context_destroy(struct st_context_iface *stctxi)
+{
+   struct st_context *st = (struct st_context *) stctxi;
+   st_destroy_context(st);
+}
+
+static struct st_context_iface *
+st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
+                      const struct st_context_attribs *attribs,
+                      struct st_context_iface *shared_stctxi)
+{
+   struct st_context *shared_ctx = (struct st_context *) shared_stctxi;
+   struct st_context *st;
+   struct pipe_context *pipe;
+   struct gl_config mode;
+   gl_api api;
+
+   if (!(stapi->profile_mask & (1 << attribs->profile)))
+      return NULL;
+
+   switch (attribs->profile) {
+   case ST_PROFILE_DEFAULT:
+      api = API_OPENGL;
+      break;
+   case ST_PROFILE_OPENGL_ES1:
+      api = API_OPENGLES;
+      break;
+   case ST_PROFILE_OPENGL_ES2:
+      api = API_OPENGLES2;
+      break;
+   case ST_PROFILE_OPENGL_CORE:
+   default:
+      return NULL;
+      break;
+   }
+
+   pipe = smapi->screen->context_create(smapi->screen, NULL);
+   if (!pipe)
+      return NULL;
+
+   st_visual_to_context_mode(&attribs->visual, &mode);
+   st = st_create_context(api, pipe, &mode, shared_ctx);
+   if (!st) {
+      pipe->destroy(pipe);
+      return NULL;
+   }
+
+   /* need to perform version check */
+   if (attribs->major > 1 || attribs->minor > 0) {
+      _mesa_compute_version(st->ctx);
+
+      /* is the actual version less than the requested version? */
+      if (st->ctx->VersionMajor * 10 + st->ctx->VersionMinor <
+          attribs->major * 10 + attribs->minor) {
+         st_destroy_context(st);
+         return NULL;
+      }
+   }
+
+   st->invalidate_on_gl_viewport =
+      smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
+
+   st->iface.destroy = st_context_destroy;
+   st->iface.notify_invalid_framebuffer =
+      st_context_notify_invalid_framebuffer;
+   st->iface.flush = st_context_flush;
+   st->iface.teximage = st_context_teximage;
+   st->iface.copy = st_context_copy;
+   st->iface.share = st_context_share;
+   st->iface.st_context_private = (void *) smapi;
+
+   return &st->iface;
+}
+
+static boolean
+st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
+                    struct st_framebuffer_iface *stdrawi,
+                    struct st_framebuffer_iface *streadi)
+{
+   struct st_context *st = (struct st_context *) stctxi;
+   struct st_framebuffer *stdraw, *stread, *stfb;
+   boolean ret;
+
+   _glapi_check_multithread();
+
+   if (st) {
+      /* reuse/create the draw fb */
+      stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);
+      if (stfb && stfb->iface == stdrawi) {
+         stdraw = NULL;
+         st_framebuffer_reference(&stdraw, stfb);
+      }
+      else {
+         stdraw = st_framebuffer_create(stdrawi);
+      }
+
+      /* reuse/create the read fb */
+      stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);
+      if (!stfb || stfb->iface != streadi)
+         stfb = stdraw;
+      if (stfb && stfb->iface == streadi) {
+         stread = NULL;
+         st_framebuffer_reference(&stread, stfb);
+      }
+      else {
+         stread = st_framebuffer_create(streadi);
+      }
+
+      if (stdraw && stread) {
+         st_framebuffer_validate(stdraw, st);
+         if (stread != stdraw)
+            st_framebuffer_validate(stread, st);
+
+         /* modify the draw/read buffers of the context */
+         if (stdraw->iface) {
+            st_visual_to_default_buffer(stdraw->iface->visual,
+                  &st->ctx->Color.DrawBuffer[0], NULL);
+         }
+         if (stread->iface) {
+            st_visual_to_default_buffer(stread->iface->visual,
+                  &st->ctx->Pixel.ReadBuffer, NULL);
+         }
+
+         ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);
+      }
+      else {
+         struct gl_framebuffer *incomplete = _mesa_get_incomplete_framebuffer();
+         ret = _mesa_make_current(st->ctx, incomplete, incomplete);
+      }
+
+      st_framebuffer_reference(&stdraw, NULL);
+      st_framebuffer_reference(&stread, NULL);
+   }
+   else {
+      ret = _mesa_make_current(NULL, NULL, NULL);
+   }
+
+   return ret;
+}
+
+static struct st_context_iface *
+st_api_get_current(struct st_api *stapi)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct st_context *st = (ctx) ? ctx->st : NULL;
+
+   return (st) ? &st->iface : NULL;
+}
+
+static st_proc_t
+st_api_get_proc_address(struct st_api *stapi, const char *procname)
+{
+   return (st_proc_t) _glapi_get_proc_address(procname);
+}
+
+static void
+st_api_destroy(struct st_api *stapi)
+{
+}
+
+/**
+ * Flush the front buffer if the current context renders to the front buffer.
+ */
+void
+st_manager_flush_frontbuffer(struct st_context *st)
+{
+   struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
+   struct st_renderbuffer *strb = NULL;
+
+   if (stfb)
+      strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
+   if (!strb)
+      return;
+
+   /* never a dummy fb */
+   assert(stfb->iface);
+   stfb->iface->flush_front(stfb->iface, ST_ATTACHMENT_FRONT_LEFT);
+}
+
+/**
+ * Return the surface of an EGLImage.
+ * FIXME: I think this should operate on resources, not surfaces
+ */
+struct pipe_surface *
+st_manager_get_egl_image_surface(struct st_context *st,
+                                 void *eglimg, unsigned usage)
+{
+   struct st_manager *smapi =
+      (struct st_manager *) st->iface.st_context_private;
+   struct st_egl_image stimg;
+   struct pipe_surface *ps, surf_tmpl;
+
+   if (!smapi || !smapi->get_egl_image)
+      return NULL;
+
+   memset(&stimg, 0, sizeof(stimg));
+   if (!smapi->get_egl_image(smapi, eglimg, &stimg))
+      return NULL;
+
+   memset(&surf_tmpl, 0, sizeof(surf_tmpl));
+   surf_tmpl.format = stimg.texture->format;
+   surf_tmpl.usage = usage;
+   surf_tmpl.u.tex.level = stimg.level;
+   surf_tmpl.u.tex.first_layer = stimg.layer;
+   surf_tmpl.u.tex.last_layer = stimg.layer;
+   ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);
+   pipe_resource_reference(&stimg.texture, NULL);
+
+   return ps;
+}
+
+/**
+ * Re-validate the framebuffers.
+ */
+void
+st_manager_validate_framebuffers(struct st_context *st)
+{
+   struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
+   struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);
+
+   if (stdraw)
+      st_framebuffer_validate(stdraw, st);
+   if (stread && stread != stdraw)
+      st_framebuffer_validate(stread, st);
+}
+
+/**
+ * Add a color renderbuffer on demand.
+ */
+boolean
+st_manager_add_color_renderbuffer(struct st_context *st,
+                                  struct gl_framebuffer *fb,
+                                  gl_buffer_index idx)
+{
+   struct st_framebuffer *stfb = st_ws_framebuffer(fb);
+
+   /* FBO */
+   if (!stfb)
+      return FALSE;
+
+   if (stfb->Base.Attachment[idx].Renderbuffer)
+      return TRUE;
+
+   switch (idx) {
+   case BUFFER_FRONT_LEFT:
+   case BUFFER_BACK_LEFT:
+   case BUFFER_FRONT_RIGHT:
+   case BUFFER_BACK_RIGHT:
+      break;
+   default:
+      return FALSE;
+      break;
+   }
+
+   if (!st_framebuffer_add_renderbuffer(stfb, idx))
+      return FALSE;
+
+   st_framebuffer_update_attachments(stfb);
+   st_invalidate_state(st->ctx, _NEW_BUFFERS);
+
+   return TRUE;
+}
+
+static const struct st_api st_gl_api = {
+   "Mesa " MESA_VERSION_STRING,
+   ST_API_OPENGL,
+#if FEATURE_GL
+   ST_PROFILE_DEFAULT_MASK |
+#endif
+#if FEATURE_ES1
+   ST_PROFILE_OPENGL_ES1_MASK |
+#endif
+#if FEATURE_ES2
+   ST_PROFILE_OPENGL_ES2_MASK |
+#endif
+   0,
+   st_api_destroy,
+   st_api_get_proc_address,
+   st_api_create_context,
+   st_api_make_current,
+   st_api_get_current,
+};
+
+struct st_api *
+st_gl_api_create(void)
+{
+   return (struct st_api *) &st_gl_api;
+}