Merge branch 'gallium-0.2' of git+ssh://marcheu@git.freedesktop.org/git/mesa/mesa into gallium-0.2

115 files changed, 550 insertions, 501 deletions

diff --git a/progs/SConscript b/progs/SConscript
index ffb6de4f16..631923a38f 100644
--- a/progs/SConscript
+++ b/progs/SConscript
@@ -1,4 +1,5 @@
 SConscript([
+    'util/SConscript',
     'demos/SConscript',
     'trivial/SConscript',
     'vp/SConscript',
diff --git a/progs/demos/SConscript b/progs/demos/SConscript
index 112da7bedb..bc166dd789 100644
--- a/progs/demos/SConscript
+++ b/progs/demos/SConscript
@@ -1,11 +1,22 @@
-Import('env')
+Import('*')
 
 if not env['GLUT']:
     Return()
 
 env = env.Clone()
 
-env.Prepend(LIBS = ['$GLUT_LIB'])
+env.Prepend(CPPPATH = [
+	'../util',
+])
+
+env.Prepend(LIBS = [
+	util,
+	'$GLUT_LIB'
+])
+
+if env['platform'] == 'windows':
+    env.Append(CPPDEFINES = ['NOMINMAX'])
+    env.Prepend(LIBS = ['winmm'])
 
 progs = [
 	'arbfplight',
@@ -38,7 +49,6 @@ progs = [
 	'multiarb',
 	'paltex',
 	'pointblast',
-	'rain',
 	'ray',
 	'readpix',
 	'reflect',
@@ -65,7 +75,15 @@ progs = [
 ]
 
 for prog in progs:
-    prog = env.Program(
+    env.Program(
         target = prog,
         source = prog + '.c',
     )
+    
+env.Program(
+    target = 'rain',
+    source = [
+        'rain.cxx',
+        'particles.cxx',
+    ]
+)
diff --git a/progs/demos/fogcoord.c b/progs/demos/fogcoord.c
index 00c73c6f04..6f50993c98 100644
--- a/progs/demos/fogcoord.c
+++ b/progs/demos/fogcoord.c
@@ -7,19 +7,16 @@
  * Daniel Borca
  */
 
-#define GL_GLEXT_PROTOTYPES
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
 
 #define DEPTH 5.0f
 
-static PFNGLFOGCOORDFEXTPROC glFogCoordf_ext;
 static PFNGLFOGCOORDPOINTEREXTPROC glFogCoordPointer_ext;
 
-static GLboolean have_fog_coord;
-
 static GLfloat camz;
 
 static GLint fogMode;
@@ -45,10 +42,11 @@ Reset(void)
 }
 
 
-static void APIENTRY
-glFogCoordf_nop (GLfloat f)
+static void
+glFogCoordf_ext (GLfloat f)
 {
-   (void)f;
+   if (fogCoord)
+      glFogCoordfEXT(f);
 }
 
 
@@ -120,14 +118,11 @@ SetFogMode(GLint fogMode)
 static GLboolean
 SetFogCoord(GLboolean fogCoord)
 {
-   glFogCoordf_ext = glFogCoordf_nop;
-
-   if (!have_fog_coord) {
+   if (!GLEW_EXT_fog_coord) {
       return GL_FALSE;
    }
 
    if (fogCoord) {
-      glFogCoordf_ext = (PFNGLFOGCOORDFEXTPROC)glutGetProcAddress("glFogCoordfEXT");
       glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);
    }
    else {
@@ -340,7 +335,7 @@ Key( unsigned char key, int x, int y )
          SetFogMode(fogMode);
          break;
       case 'c':
-         fogCoord = SetFogCoord(fogCoord ^ GL_TRUE);
+	 fogCoord = SetFogCoord(fogCoord ^ GL_TRUE);
          break;
       case 't':
          Texture = !Texture;
@@ -372,8 +367,7 @@ Init(void)
 
    printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 
-   have_fog_coord = glutExtensionSupported("GL_EXT_fog_coord");
-   if (!have_fog_coord) {
+   if (!GLEW_EXT_fog_coord) {
       printf("GL_EXT_fog_coord not supported!\n");
    }
 
@@ -400,10 +394,9 @@ Init(void)
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
    glTexCoordPointer(2, GL_FLOAT, 0, texcoord_pointer);
 
-   if (have_fog_coord) {
-      glFogCoordPointer_ext = (PFNGLFOGCOORDPOINTEREXTPROC)glutGetProcAddress("glFogCoordPointerEXT");
+   if (GLEW_EXT_fog_coord) {
       glEnableClientState(GL_FOG_COORDINATE_ARRAY_EXT);
-      glFogCoordPointer_ext(GL_FLOAT, 0, fogcoord_pointer);
+      glFogCoordPointerEXT(GL_FLOAT, 0, fogcoord_pointer);
    }
 
    Reset();
@@ -417,6 +410,7 @@ main( int argc, char *argv[] )
    glutInitWindowSize( 600, 600 );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
    glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
    glutDisplayFunc( Display );
diff --git a/progs/demos/gloss.c b/progs/demos/gloss.c
index 9974f0dab2..b2126e3267 100644
--- a/progs/demos/gloss.c
+++ b/progs/demos/gloss.c
@@ -22,6 +22,7 @@
 #include <stdlib.h>
 #include <math.h>
 #include <string.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
 
 #include "readtex.h"
@@ -438,6 +439,7 @@ int main( int argc, char *argv[] )
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
    glutCreateWindow(argv[0] );
+   glewInit();
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
    glutDisplayFunc( Display );
diff --git a/progs/demos/multiarb.c b/progs/demos/multiarb.c
index 451fd11efe..85c4e3a266 100644
--- a/progs/demos/multiarb.c
+++ b/progs/demos/multiarb.c
@@ -14,6 +14,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
 
 #include "readtex.h"
@@ -326,6 +327,7 @@ int main( int argc, char *argv[] )
    glutInitWindowPosition( 0, 0 );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
    glutCreateWindow(argv[0] );
+   glewInit();
 
    Init( argc, argv );
 
diff --git a/progs/demos/rain.cxx b/progs/demos/rain.cxx
index 59b6471ef8..265d90cd95 100644
--- a/progs/demos/rain.cxx
+++ b/progs/demos/rain.cxx
@@ -24,8 +24,6 @@ extern "C" {
 #ifdef _WIN32
 #include <windows.h>
 #include <mmsystem.h>
-#include "particles.cxx"
-#include "readtex.c"
 #endif
 
 #ifdef XMESA
diff --git a/progs/demos/stex3d.c b/progs/demos/stex3d.c
index 83ae3684ae..c0bbea0960 100644
--- a/progs/demos/stex3d.c
+++ b/progs/demos/stex3d.c
@@ -18,7 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
 
 
@@ -662,6 +662,8 @@ main(int argc, char **argv)
       exit(0);
    }
 
+   glewInit();
+
    init();
 
    printHelp();
diff --git a/progs/demos/winpos.c b/progs/demos/winpos.c
index b58e330864..13a9c7e9a8 100644
--- a/progs/demos/winpos.c
+++ b/progs/demos/winpos.c
@@ -11,7 +11,7 @@
 #ifdef _WIN32
 #include <windows.h>
 #endif
-#define GL_GLEXT_PROTOTYPES
+#include "GL/glew.h"
 #include "GL/glut.h"
 
 #include "readtex.h"
@@ -29,8 +29,7 @@ static GLubyte *Image;
 static int ImgWidth, ImgHeight;
 static GLenum ImgFormat;
 
-typedef void (APIENTRY * PFNWINDOWPOSFUNC)(GLfloat x, GLfloat y);
-static PFNWINDOWPOSFUNC WindowPosFunc;
+static PFNGLWINDOWPOS2FPROC WindowPosFunc;
 
 static void draw( void )
 {
@@ -71,19 +70,16 @@ static void reshape( int width, int height )
 
 static void init( void )
 {
-#ifdef GL_ARB_window_pos
-   if (glutExtensionSupported("GL_ARB_window_pos")) {
+   if (GLEW_ARB_window_pos) {
       printf("Using GL_ARB_window_pos\n");
-      WindowPosFunc = &glWindowPos2fARB;
+      WindowPosFunc = glWindowPos2fARB;
    }
    else
-#elif defined(GL_MESA_window_pos)
-   if (glutExtensionSupported("GL_MESA_window_pos")) {
+   if (GLEW_MESA_window_pos) {
       printf("Using GL_MESA_window_pos\n");
-      WindowPosFunc = &glWindowPos2fMESA;
+      WindowPosFunc = glWindowPos2fMESA;
    }
    else
-#endif
    {
       printf("Sorry, GL_ARB/MESA_window_pos extension not available.\n");
       exit(1);
@@ -109,6 +105,8 @@ int main( int argc, char *argv[] )
       exit(0);
    }
 
+   glewInit();
+
    init();
 
    glutReshapeFunc( reshape );
diff --git a/progs/trivial/fs-tri.c b/progs/trivial/fs-tri.c
index 3be4d42e54..6e86df1dcf 100644
--- a/progs/trivial/fs-tri.c
+++ b/progs/trivial/fs-tri.c
@@ -5,10 +5,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 
 
 static GLuint fragShader;
@@ -56,9 +54,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -110,15 +108,15 @@ LoadAndCompileShader(GLuint shader, const char *text)
 {
    GLint stat;
 
-   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+   glShaderSource(shader, 1, (const GLchar **) &text, NULL);
 
-   glCompileShader_func(shader);
+   glCompileShader(shader);
 
-   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   glGetShaderiv(shader, GL_COMPILE_STATUS, &stat);
    if (!stat) {
       GLchar log[1000];
       GLsizei len;
-      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      glGetShaderInfoLog(shader, 1000, &len, log);
       fprintf(stderr, "fslight: problem compiling shader:\n%s\n", log);
       exit(1);
    }
@@ -129,11 +127,11 @@ static void
 CheckLink(GLuint prog)
 {
    GLint stat;
-   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   glGetProgramiv(prog, GL_LINK_STATUS, &stat);
    if (!stat) {
       GLchar log[1000];
       GLsizei len;
-      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      glGetProgramInfoLog(prog, 1000, &len, log);
       fprintf(stderr, "Linker error:\n%s\n", log);
    }
 }
@@ -165,24 +163,22 @@ Init(void)
       exit(1);
    }
 
-   GetExtensionFuncs();
-
-   fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+   fragShader = glCreateShader(GL_FRAGMENT_SHADER);
    LoadAndCompileShader(fragShader, fragShaderText);
 
 #if 0
-   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   vertShader = glCreateShader(GL_VERTEX_SHADER);
    LoadAndCompileShader(vertShader, vertShaderText);
 #endif
 
-   program = glCreateProgram_func();
-   glAttachShader_func(program, fragShader);
+   program = glCreateProgram();
+   glAttachShader(program, fragShader);
 #if 0
-   glAttachShader_func(program, vertShader);
+   glAttachShader(program, vertShader);
 #endif
-   glLinkProgram_func(program);
+   glLinkProgram(program);
    CheckLink(program);
-   glUseProgram_func(program);
+   glUseProgram(program);
 
    assert(glGetError() == 0);
 
@@ -200,6 +196,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(200, 200);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/util/SConscript b/progs/util/SConscript
new file mode 100644
index 0000000000..8ad2466291
--- /dev/null
+++ b/progs/util/SConscript
@@ -0,0 +1,15 @@
+Import('env')
+
+env = env.Clone()
+
+util = env.StaticLibrary(
+    target = ['util'],
+    source = [
+        'readtex.c',
+        'trackball.c',
+        'showbuffer.c',
+        'shaderutil.c',
+    ],
+)
+
+Export('util')
diff --git a/scons/generic.py b/scons/generic.py
index df7ef42402..05f7356b76 100644
--- a/scons/generic.py
+++ b/scons/generic.py
@@ -303,7 +303,7 @@ def generate(env):
             #'_UNICODE',
             #'UNICODE',
             # http://msdn2.microsoft.com/en-us/library/6dwk3a1z.aspx,
-            'WIN32_LEAN_AND_MEAN',
+            #'WIN32_LEAN_AND_MEAN',
             'VC_EXTRALEAN',
             '_CRT_SECURE_NO_DEPRECATE',
         ]
@@ -362,24 +362,26 @@ def generate(env):
         ])
 
     # C compiler options
-    cflags = []
+    cflags = [] # C
+    cxxflags = [] # C++
+    ccflags = [] # C & C++
     if gcc:
         if debug:
-            cflags += ['-O0', '-g3']
+            ccflags += ['-O0', '-g3']
         else:
-            cflags += ['-O3', '-g0']
+            ccflags += ['-O3', '-g0']
         if env['profile']:
-            cflags += ['-pg']
+            ccflags += ['-pg']
         if env['machine'] == 'x86':
-            cflags += [
+            ccflags += [
                 '-m32',
                 #'-march=pentium4',
                 '-mmmx', '-msse', '-msse2', # enable SIMD intrinsics
                 #'-mfpmath=sse',
             ]
         if env['machine'] == 'x86_64':
-            cflags += ['-m64']
-        cflags += [
+            ccflags += ['-m64']
+        ccflags += [
             '-Wall',
             '-Wmissing-prototypes',
             '-Wno-long-long',
@@ -387,43 +389,46 @@ def generate(env):
             '-pedantic',
             '-fmessage-length=0', # be nice to Eclipse
         ]
+        cflags += [
+            '-Wmissing-prototypes',
+        ]
     if msvc:
         # See also:
         # - http://msdn.microsoft.com/en-us/library/19z1t1wy.aspx
         # - cl /?
         if debug:
-            cflags += [
+            ccflags += [
               '/Od', # disable optimizations
               '/Oi', # enable intrinsic functions
               '/Oy-', # disable frame pointer omission
             ]
         else:
-            cflags += [
+            ccflags += [
               '/Ox', # maximum optimizations
               '/Oi', # enable intrinsic functions
               '/Ot', # favor code speed
               #'/fp:fast', # fast floating point 
             ]
         if env['profile']:
-            cflags += [
+            ccflags += [
                 '/Gh', # enable _penter hook function
                 '/GH', # enable _pexit hook function
             ]
-        cflags += [
+        ccflags += [
             '/W3', # warning level
             #'/Wp64', # enable 64 bit porting warnings
         ]
         if env['machine'] == 'x86':
-            cflags += [
+            ccflags += [
                 #'/QIfist', # Suppress _ftol
                 #'/arch:SSE2', # use the SSE2 instructions
             ]
         if platform == 'windows':
-            cflags += [
+            ccflags += [
                 # TODO
             ]
         if platform == 'winddk':
-            cflags += [
+            ccflags += [
                 '/Zl', # omit default library name in .OBJ
                 '/Zp8', # 8bytes struct member alignment
                 '/Gy', # separate functions for linker
@@ -442,7 +447,7 @@ def generate(env):
             ]
         if platform == 'wince':
             # See also C:\WINCE600\public\common\oak\misc\makefile.def
-            cflags += [
+            ccflags += [
                 '/Zl', # omit default library name in .OBJ
                 '/GF', # enable read-only string pooling
                 '/GR-', # disable C++ RTTI
@@ -459,8 +464,9 @@ def generate(env):
         # See http://scons.tigris.org/issues/show_bug.cgi?id=1656
         env.EnsureSConsVersion(0, 98, 0)
         env['PDB'] = '${TARGET.base}.pdb'
+    env.Append(CCFLAGS = ccflags)
     env.Append(CFLAGS = cflags)
-    env.Append(CXXFLAGS = cflags)
+    env.Append(CXXFLAGS = cxxflags)
 
     if env['platform'] == 'windows' and msvc:
         # Choose the appropriate MSVC CRT
diff --git a/src/gallium/auxiliary/pipebuffer/Makefile b/src/gallium/auxiliary/pipebuffer/Makefile
index 4bcf08f8a5..3b501c51df 100644
--- a/src/gallium/auxiliary/pipebuffer/Makefile
+++ b/src/gallium/auxiliary/pipebuffer/Makefile
@@ -14,8 +14,7 @@ C_SOURCES = \
 	pb_bufmgr_ondemand.c \
 	pb_bufmgr_pool.c \
 	pb_bufmgr_slab.c \
-	pb_validate.c \
-	pb_winsys.c
+	pb_validate.c
 
 include ../../Makefile.template
 
diff --git a/src/gallium/auxiliary/pipebuffer/SConscript b/src/gallium/auxiliary/pipebuffer/SConscript
index 4acf721808..8e9f06abe4 100644
--- a/src/gallium/auxiliary/pipebuffer/SConscript
+++ b/src/gallium/auxiliary/pipebuffer/SConscript
@@ -14,7 +14,6 @@ pipebuffer = env.ConvenienceLibrary(
 		'pb_bufmgr_pool.c',
 		'pb_bufmgr_slab.c',
 		'pb_validate.c',
-		'pb_winsys.c',
 	])
 
 auxiliaries.insert(0, pipebuffer)
diff --git a/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c b/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c
index aa4b096274..61afdfe82a 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c
+++ b/src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c
@@ -44,7 +44,7 @@
 #include "pipe/p_compiler.h"
 #include "pipe/p_error.h"
 #include "pipe/p_debug.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_thread.h"
 #include "util/u_memory.h"
 #include "util/u_double_list.h"
diff --git a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c
index f57a7bffd7..a168853713 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c
+++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_cache.c
@@ -36,7 +36,6 @@
 
 #include "pipe/p_compiler.h"
 #include "pipe/p_debug.h"
-#include "pipe/p_winsys.h"
 #include "pipe/p_thread.h"
 #include "util/u_memory.h"
 #include "util/u_double_list.h"
diff --git a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c
index 62639fe1c8..26d9c24aec 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c
+++ b/src/gallium/auxiliary/pipebuffer/pb_bufmgr_debug.c
@@ -35,7 +35,6 @@
 
 #include "pipe/p_compiler.h"
 #include "pipe/p_debug.h"
-#include "pipe/p_winsys.h"
 #include "pipe/p_thread.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
diff --git a/src/gallium/auxiliary/pipebuffer/pb_winsys.c b/src/gallium/auxiliary/pipebuffer/pb_winsys.c
deleted file mode 100644
index 452835fdad..0000000000
--- a/src/gallium/auxiliary/pipebuffer/pb_winsys.c
+++ /dev/null
@@ -1,191 +0,0 @@
-/**************************************************************************
- *
- * 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.
- *
- **************************************************************************/
-
-/**
- * \file
- * Implementation of client buffer (also designated as "user buffers"), which
- * are just state-tracker owned data masqueraded as buffers.
- * 
- * \author Jose Fonseca <jrfonseca@tungstengraphics.com>
- */
-
-
-#include "pipe/p_winsys.h"
-#include "util/u_memory.h"
-
-#include "pb_buffer.h"
-#include "pb_winsys.h"
-
-
-/**
- * User buffers are special buffers that initially reference memory
- * held by the user but which may if necessary copy that memory into
- * device memory behind the scenes, for submission to hardware.
- *
- * These are particularly useful when the referenced data is never
- * submitted to hardware at all, in the particular case of software
- * vertex processing.
- */
-struct pb_user_buffer 
-{
-   struct pb_buffer base;
-   void *data;
-};
-
-
-extern const struct pb_vtbl pb_user_buffer_vtbl;
-
-
-static INLINE struct pb_user_buffer *
-pb_user_buffer(struct pb_buffer *buf)
-{
-   assert(buf);
-   assert(buf->vtbl == &pb_user_buffer_vtbl);
-   return (struct pb_user_buffer *)buf;
-}
-
-
-static void
-pb_user_buffer_destroy(struct pb_buffer *buf)
-{
-   assert(buf);
-   FREE(buf);
-}
-
-
-static void *
-pb_user_buffer_map(struct pb_buffer *buf, 
-                   unsigned flags)
-{
-   return pb_user_buffer(buf)->data;
-}
-
-
-static void
-pb_user_buffer_unmap(struct pb_buffer *buf)
-{
-   /* No-op */
-}
-
-
-static enum pipe_error 
-pb_user_buffer_validate(struct pb_buffer *buf, 
-                        struct pb_validate *vl,
-                        unsigned flags)
-{
-   assert(0);
-   return PIPE_ERROR;
-}
-
-
-static void
-pb_user_buffer_fence(struct pb_buffer *buf, 
-                     struct pipe_fence_handle *fence)
-{
-   assert(0);
-}
-
-
-static void
-pb_user_buffer_get_base_buffer(struct pb_buffer *buf,
-                               struct pb_buffer **base_buf,
-                               unsigned *offset)
-{
-   *base_buf = buf;
-   *offset = 0;
-}
-
-
-const struct pb_vtbl 
-pb_user_buffer_vtbl = {
-      pb_user_buffer_destroy,
-      pb_user_buffer_map,
-      pb_user_buffer_unmap,
-      pb_user_buffer_validate,
-      pb_user_buffer_fence,
-      pb_user_buffer_get_base_buffer
-};
-
-
-struct pipe_buffer *
-pb_winsys_user_buffer_create(struct pipe_winsys *winsys,
-                             void *data, 
-                             unsigned bytes) 
-{
-   struct pb_user_buffer *buf = CALLOC_STRUCT(pb_user_buffer);
-
-   if(!buf)
-      return NULL;
-   
-   buf->base.base.refcount = 1;
-   buf->base.base.size = bytes;
-   buf->base.base.alignment = 0;
-   buf->base.base.usage = 0;
-
-   buf->base.vtbl = &pb_user_buffer_vtbl;   
-   buf->data = data;
-   
-   return &buf->base.base;
-}
-
-
-void *
-pb_winsys_buffer_map(struct pipe_winsys *winsys,
-                     struct pipe_buffer *buf,
-                     unsigned flags)
-{
-   (void)winsys;
-   return pb_map(pb_buffer(buf), flags);
-}
-
-
-void
-pb_winsys_buffer_unmap(struct pipe_winsys *winsys,
-                       struct pipe_buffer *buf)
-{
-   (void)winsys;
-   pb_unmap(pb_buffer(buf));
-}
-
-
-void
-pb_winsys_buffer_destroy(struct pipe_winsys *winsys,
-                         struct pipe_buffer *buf)
-{
-   (void)winsys;
-   pb_destroy(pb_buffer(buf));
-}
-
-
-void 
-pb_init_winsys(struct pipe_winsys *winsys)
-{
-   winsys->user_buffer_create = pb_winsys_user_buffer_create;
-   winsys->buffer_map = pb_winsys_buffer_map;
-   winsys->buffer_unmap = pb_winsys_buffer_unmap;
-   winsys->buffer_destroy = pb_winsys_buffer_destroy;
-}
diff --git a/src/gallium/auxiliary/util/Makefile b/src/gallium/auxiliary/util/Makefile
index 6773ed73cf..44c2377721 100644
--- a/src/gallium/auxiliary/util/Makefile
+++ b/src/gallium/auxiliary/util/Makefile
@@ -23,7 +23,8 @@ C_SOURCES = \
 	u_stream_wd.c \
 	u_tile.c \
 	u_time.c \
-	u_timed_winsys.c
+	u_timed_winsys.c \
+	u_simple_screen.c
 
 include ../../Makefile.template
 
diff --git a/src/gallium/auxiliary/util/SConscript b/src/gallium/auxiliary/util/SConscript
index 5df932c0f7..35f683fb8e 100644
--- a/src/gallium/auxiliary/util/SConscript
+++ b/src/gallium/auxiliary/util/SConscript
@@ -24,6 +24,7 @@ util = env.ConvenienceLibrary(
 		'u_tile.c',
 		'u_time.c',
 		'u_timed_winsys.c',
+		'u_simple_screen.c',
 	])
 
 auxiliaries.insert(0, util)
diff --git a/src/gallium/auxiliary/util/u_blit.c b/src/gallium/auxiliary/util/u_blit.c
index bc88086b5e..841e9c01e7 100644
--- a/src/gallium/auxiliary/util/u_blit.c
+++ b/src/gallium/auxiliary/util/u_blit.c
@@ -37,7 +37,6 @@
 #include "pipe/p_debug.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
 #include "pipe/p_shader_tokens.h"
 
 #include "util/u_blit.h"
diff --git a/src/gallium/auxiliary/util/u_draw_quad.c b/src/gallium/auxiliary/util/u_draw_quad.c
index 1af575530f..f282f3d289 100644
--- a/src/gallium/auxiliary/util/u_draw_quad.c
+++ b/src/gallium/auxiliary/util/u_draw_quad.c
@@ -29,7 +29,6 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
 #include "util/u_draw_quad.h"
 
 
diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.c b/src/gallium/auxiliary/util/u_gen_mipmap.c
index cb9776ed95..301a58ed7b 100644
--- a/src/gallium/auxiliary/util/u_gen_mipmap.c
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.c
@@ -38,7 +38,6 @@
 #include "pipe/p_debug.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
 #include "pipe/p_shader_tokens.h"
 
 #include "util/u_memory.h"
diff --git a/src/gallium/auxiliary/util/u_simple_screen.c b/src/gallium/auxiliary/util/u_simple_screen.c
new file mode 100644
index 0000000000..089bbbc48a
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_simple_screen.c
@@ -0,0 +1,143 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, 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.
+ *
+ **************************************************************************/
+
+#include "u_simple_screen.h"
+
+#include "pipe/p_screen.h"
+#include "pipe/internal/p_winsys_screen.h"
+
+
+static struct pipe_buffer *
+pass_buffer_create(struct pipe_screen *screen,
+                   unsigned alignment,
+                   unsigned usage,
+                   unsigned size)
+{
+   return screen->winsys->buffer_create(screen->winsys,
+                                        alignment, usage, size);
+}
+
+static struct pipe_buffer *
+pass_user_buffer_create(struct pipe_screen *screen,
+                        void *ptr,
+                        unsigned bytes)
+{
+   return screen->winsys->user_buffer_create(screen->winsys,
+                                             ptr, bytes);
+}
+
+static struct pipe_buffer *
+pass_surface_buffer_create(struct pipe_screen *screen,
+                           unsigned width, unsigned height,
+                           enum pipe_format format,
+                           unsigned usage,
+                           unsigned *stride)
+{
+   return screen->winsys->surface_buffer_create(screen->winsys,
+                                                width, height,
+                                                format, usage, stride);
+}
+
+static void *
+pass_buffer_map(struct pipe_screen *screen,
+                struct pipe_buffer *buf,
+                unsigned usage)
+{
+   return screen->winsys->buffer_map(screen->winsys,
+                                     buf, usage);
+}
+
+static void
+pass_buffer_unmap(struct pipe_screen *screen,
+                  struct pipe_buffer *buf)
+{
+   screen->winsys->buffer_unmap(screen->winsys, buf);
+}
+
+static void
+pass_buffer_destroy(struct pipe_screen *screen,
+                    struct pipe_buffer *buf)
+{
+   screen->winsys->buffer_destroy(screen->winsys, buf);
+}
+
+
+static void
+pass_flush_frontbuffer(struct pipe_screen *screen,
+                       struct pipe_surface *surf,
+                       void *context_private)
+{
+   screen->winsys->flush_frontbuffer(screen->winsys,
+                                     surf, context_private);
+}
+
+static void
+pass_fence_reference(struct pipe_screen *screen,
+                     struct pipe_fence_handle **ptr,
+                     struct pipe_fence_handle *fence)
+{
+   screen->winsys->fence_reference(screen->winsys,
+                                   ptr, fence);
+}
+
+static int
+pass_fence_signalled(struct pipe_screen *screen,
+                     struct pipe_fence_handle *fence,
+                     unsigned flag)
+{
+   return screen->winsys->fence_signalled(screen->winsys,
+                                          fence, flag);
+}
+
+static int
+pass_fence_finish(struct pipe_screen *screen,
+                  struct pipe_fence_handle *fence,
+                  unsigned flag)
+{
+   return screen->winsys->fence_finish(screen->winsys,
+                                       fence, flag);
+}
+
+void u_simple_screen_init(struct pipe_screen *screen)
+{
+   screen->buffer_create = pass_buffer_create;
+   screen->user_buffer_create = pass_user_buffer_create;
+   screen->surface_buffer_create = pass_surface_buffer_create;
+
+   screen->buffer_map = pass_buffer_map;
+   screen->buffer_unmap = pass_buffer_unmap;
+   screen->buffer_destroy = pass_buffer_destroy;
+   screen->flush_frontbuffer = pass_flush_frontbuffer;
+   screen->fence_reference = pass_fence_reference;
+   screen->fence_signalled = pass_fence_signalled;
+   screen->fence_finish = pass_fence_finish;
+}
+
+const char* u_simple_screen_winsys_name(struct pipe_screen *screen)
+{
+   return screen->winsys->get_name(screen->winsys);
+}
diff --git a/src/gallium/auxiliary/pipebuffer/pb_winsys.h b/src/gallium/auxiliary/util/u_simple_screen.h
index 7cf6f8e3f0..6612a8a7c0 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_winsys.h
+++ b/src/gallium/auxiliary/util/u_simple_screen.h
@@ -1,6 +1,6 @@
 /**************************************************************************
  *
- * Copyright 2009 VMWare, Inc.
+ * Copyright 2009 VMware, Inc.
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -18,62 +18,30 @@
  * 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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * 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.
  *
  **************************************************************************/
 
+#ifndef U_SIMPLE_SCREEN_H
+#define U_SIMPLE_SCREEN_H
+
+struct pipe_screen;
+struct pipe_winsys;
+
 /**
- * @file
- * Drop-in replacements for winsys buffer callbacks.
+ * The following function initializes a simple passthrough screen.
  *
- * The requirement to use this functions is that all pipe_buffers must be in
- * fact pb_buffers.
- * 
- * @author Jose Fonseca <jfonseca@vmware.com>
+ * All the relevant screen function pointers will forwarded to the
+ * winsys.
  */
+void u_simple_screen_init(struct pipe_screen *screen);
 
-#ifndef PB_WINSYS_H_
-#define PB_WINSYS_H_
-
-
-#include "pipe/p_compiler.h"
-#include "pipe/p_debug.h"
-#include "pipe/p_state.h"
-#include "pipe/p_inlines.h"
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-struct pipe_buffer *
-pb_winsys_user_buffer_create(struct pipe_winsys *winsys,
-			     void *data, 
-			     unsigned bytes);
-                                
-void *
-pb_winsys_buffer_map(struct pipe_winsys *winsys,
-		     struct pipe_buffer *buf,
-		     unsigned flags);
-
-void
-pb_winsys_buffer_unmap(struct pipe_winsys *winsys,
-		       struct pipe_buffer *buf);
-
-void
-pb_winsys_buffer_destroy(struct pipe_winsys *winsys,
-			 struct pipe_buffer *buf);
-
-void 
-pb_init_winsys(struct pipe_winsys *winsys);
-
+/**
+ * Returns the name of the winsys associated with this screen.
+ */
+const char* u_simple_screen_winsys_name(struct pipe_screen *screen);
 
-#ifdef __cplusplus
-}
 #endif
-
-#endif /*PB_WINSYS_H_*/
diff --git a/src/gallium/auxiliary/util/u_simple_shaders.c b/src/gallium/auxiliary/util/u_simple_shaders.c
index f06d13c2c4..706155e99a 100644
--- a/src/gallium/auxiliary/util/u_simple_shaders.c
+++ b/src/gallium/auxiliary/util/u_simple_shaders.c
@@ -37,7 +37,7 @@
 #include "pipe/p_debug.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/p_screen.h"
 #include "pipe/p_shader_tokens.h"
 
 #include "util/u_memory.h"
diff --git a/src/gallium/auxiliary/util/u_timed_winsys.c b/src/gallium/auxiliary/util/u_timed_winsys.c
index dc3c9be595..f237e12d73 100644
--- a/src/gallium/auxiliary/util/u_timed_winsys.c
+++ b/src/gallium/auxiliary/util/u_timed_winsys.c
@@ -29,7 +29,7 @@
  * Authors: Keith Whitwell <keithw-at-tungstengraphics-dot-com>
  */
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "u_timed_winsys.h"
 #include "util/u_memory.h"
 #include "util/u_time.h"
@@ -121,7 +121,8 @@ timed_buffer_create(struct pipe_winsys *winsys,
    struct pipe_winsys *backend = timed_winsys(winsys)->backend;
    uint64_t start = time_start();
 
-   struct pipe_buffer *buf = backend->buffer_create( backend, alignment, usage, size );
+   struct pipe_buffer *buf =
+      backend->buffer_create( backend, alignment, usage, size );
 
    time_finish(winsys, start, 0, __FUNCTION__);
    
@@ -300,9 +301,9 @@ struct pipe_winsys *u_timed_winsys_create( struct pipe_winsys *backend )
    ws->base.buffer_unmap = timed_buffer_unmap;
    ws->base.buffer_destroy = timed_buffer_destroy;
    ws->base.buffer_create = timed_buffer_create;
+   ws->base.surface_buffer_create = timed_surface_buffer_create;
    ws->base.flush_frontbuffer = timed_flush_frontbuffer;
    ws->base.get_name = timed_get_name;
-   ws->base.surface_buffer_create = timed_surface_buffer_create;
    ws->base.fence_reference = timed_fence_reference;
    ws->base.fence_signalled = timed_fence_signalled;
    ws->base.fence_finish = timed_fence_finish;
diff --git a/src/gallium/drivers/cell/ppu/cell_context.c b/src/gallium/drivers/cell/ppu/cell_context.c
index 8f502823f9..ae82ded334 100644
--- a/src/gallium/drivers/cell/ppu/cell_context.c
+++ b/src/gallium/drivers/cell/ppu/cell_context.c
@@ -36,7 +36,7 @@
 #include "pipe/p_defines.h"
 #include "pipe/p_format.h"
 #include "util/u_memory.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_screen.h"
 
 #include "draw/draw_context.h"
diff --git a/src/gallium/drivers/cell/ppu/cell_draw_arrays.c b/src/gallium/drivers/cell/ppu/cell_draw_arrays.c
index 880d535320..67949b73dd 100644
--- a/src/gallium/drivers/cell/ppu/cell_draw_arrays.c
+++ b/src/gallium/drivers/cell/ppu/cell_draw_arrays.c
@@ -33,7 +33,7 @@
 
 #include "pipe/p_defines.h"
 #include "pipe/p_context.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 
 #include "cell_context.h"
@@ -53,7 +53,7 @@ cell_map_constant_buffers(struct cell_context *sp)
    for (i = 0; i < 2; i++) {
       if (sp->constants[i].size) {
          sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
-                                                  PIPE_BUFFER_USAGE_CPU_READ);
+                                                   PIPE_BUFFER_USAGE_CPU_READ);
          cell_flush_buffer_range(sp, sp->mapped_constants[i], 
                                  sp->constants[i].buffer->size);
       }
diff --git a/src/gallium/drivers/cell/ppu/cell_screen.c b/src/gallium/drivers/cell/ppu/cell_screen.c
index 6fc2257e2a..512d85d352 100644
--- a/src/gallium/drivers/cell/ppu/cell_screen.c
+++ b/src/gallium/drivers/cell/ppu/cell_screen.c
@@ -27,7 +27,8 @@
 
 
 #include "util/u_memory.h"
-#include "pipe/p_winsys.h"
+#include "util/u_simple_screen.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_screen.h"
 
@@ -169,6 +170,7 @@ cell_create_screen(struct pipe_winsys *winsys)
    screen->is_format_supported = cell_is_format_supported;
 
    cell_init_screen_texture_funcs(screen);
+   u_simple_screen_init(screen);
 
    return screen;
 }
diff --git a/src/gallium/drivers/cell/ppu/cell_state_shader.c b/src/gallium/drivers/cell/ppu/cell_state_shader.c
index cda39f8d59..990f23e170 100644
--- a/src/gallium/drivers/cell/ppu/cell_state_shader.c
+++ b/src/gallium/drivers/cell/ppu/cell_state_shader.c
@@ -28,7 +28,7 @@
 #include "pipe/p_defines.h"
 #include "util/u_memory.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "draw/draw_context.h"
 #include "tgsi/tgsi_parse.h"
 
@@ -194,9 +194,9 @@ cell_set_constant_buffer(struct pipe_context *pipe,
    draw_flush(cell->draw);
 
    /* note: reference counting */
-   winsys_buffer_reference(ws,
-                        &cell->constants[shader].buffer,
-                        buf->buffer);
+   pipe_buffer_reference(pipe->screen,
+                         &cell->constants[shader].buffer,
+                         buf->buffer);
    cell->constants[shader].size = buf->size;
 
    if (shader == PIPE_SHADER_VERTEX)
diff --git a/src/gallium/drivers/cell/ppu/cell_texture.c b/src/gallium/drivers/cell/ppu/cell_texture.c
index 9f83ab8fa4..4f16e2c6af 100644
--- a/src/gallium/drivers/cell/ppu/cell_texture.c
+++ b/src/gallium/drivers/cell/ppu/cell_texture.c
@@ -34,7 +34,7 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 
@@ -113,7 +113,7 @@ cell_texture_create(struct pipe_screen *screen,
    cell_texture_layout(ct);
 
    ct->buffer = ws->buffer_create(ws, 32, PIPE_BUFFER_USAGE_PIXEL,
-                                  ct->buffer_size);
+                                   ct->buffer_size);
 
    if (!ct->buffer) {
       FREE(ct);
@@ -154,7 +154,7 @@ cell_texture_release(struct pipe_screen *screen,
           */
          if (ct->tiled_buffer[i]) {
             ct->tiled_mapped[i] = NULL;
-            winsys_buffer_reference(screen->winsys, &ct->tiled_buffer[i], NULL);
+            pipe_buffer_reference(screen, &ct->tiled_buffer[i], NULL);
          }
       }
 
@@ -325,11 +325,11 @@ cell_twiddle_texture(struct pipe_screen *screen,
             struct pipe_winsys *ws = screen->winsys;
             uint bytes = bufWidth * bufHeight * 4 * numFaces;
             ct->tiled_buffer[level] = ws->buffer_create(ws, 16,
-                                                        PIPE_BUFFER_USAGE_PIXEL,
-                                                        bytes);
+                                                         PIPE_BUFFER_USAGE_PIXEL,
+                                                         bytes);
             /* and map it */
             ct->tiled_mapped[level] = ws->buffer_map(ws, ct->tiled_buffer[level],
-                                                     PIPE_BUFFER_USAGE_GPU_READ);
+                                                      PIPE_BUFFER_USAGE_GPU_READ);
          }
          dst = (uint *) ((ubyte *) ct->tiled_mapped[level] + offset);
 
@@ -406,7 +406,7 @@ cell_get_tex_surface(struct pipe_screen *screen,
    if (ps) {
       assert(ps->refcount);
       assert(ps->winsys);
-      winsys_buffer_reference(ws, &ps->buffer, ct->buffer);
+      pipe_buffer_reference(screen, &ps->buffer, ct->buffer);
       ps->format = pt->format;
       ps->block = pt->block;
       ps->width = pt->width[level];
diff --git a/src/gallium/drivers/cell/ppu/cell_vertex_shader.c b/src/gallium/drivers/cell/ppu/cell_vertex_shader.c
index 2b10c116fa..403cf6d50f 100644
--- a/src/gallium/drivers/cell/ppu/cell_vertex_shader.c
+++ b/src/gallium/drivers/cell/ppu/cell_vertex_shader.c
@@ -31,7 +31,7 @@
 
 #include "pipe/p_defines.h"
 #include "pipe/p_context.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 
 #include "cell_context.h"
diff --git a/src/gallium/drivers/failover/fo_context.c b/src/gallium/drivers/failover/fo_context.c
index 10c4ffc209..0742b27b8f 100644
--- a/src/gallium/drivers/failover/fo_context.c
+++ b/src/gallium/drivers/failover/fo_context.c
@@ -27,7 +27,7 @@
 
 
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_memory.h"
 #include "pipe/p_context.h"
 
diff --git a/src/gallium/drivers/i915simple/i915_context.c b/src/gallium/drivers/i915simple/i915_context.c
index 6dd3eda85d..3e3a596884 100644
--- a/src/gallium/drivers/i915simple/i915_context.c
+++ b/src/gallium/drivers/i915simple/i915_context.c
@@ -34,7 +34,7 @@
 
 #include "draw/draw_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_memory.h"
 #include "pipe/p_screen.h"
diff --git a/src/gallium/drivers/i915simple/i915_debug.c b/src/gallium/drivers/i915simple/i915_debug.c
index 4adf9decae..a300b61c3b 100644
--- a/src/gallium/drivers/i915simple/i915_debug.c
+++ b/src/gallium/drivers/i915simple/i915_debug.c
@@ -30,7 +30,7 @@
 #include "i915_winsys.h"
 #include "i915_debug.h"
 #include "i915_batch.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_debug.h"
 
 
diff --git a/src/gallium/drivers/i915simple/i915_debug.h b/src/gallium/drivers/i915simple/i915_debug.h
index c33ee36110..16ca7277c7 100644
--- a/src/gallium/drivers/i915simple/i915_debug.h
+++ b/src/gallium/drivers/i915simple/i915_debug.h
@@ -72,7 +72,7 @@ void i915_print_ureg(const char *msg, unsigned ureg);
 
 #if defined(DEBUG) && defined(FILE_DEBUG_FLAG)
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 static INLINE void
 I915_DBG(
diff --git a/src/gallium/drivers/i915simple/i915_debug_fp.c b/src/gallium/drivers/i915simple/i915_debug_fp.c
index 48be3e1472..9c5b117b6d 100644
--- a/src/gallium/drivers/i915simple/i915_debug_fp.c
+++ b/src/gallium/drivers/i915simple/i915_debug_fp.c
@@ -28,7 +28,7 @@
 
 #include "i915_reg.h"
 #include "i915_debug.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_memory.h"
 
 
diff --git a/src/gallium/drivers/i915simple/i915_prim_vbuf.c b/src/gallium/drivers/i915simple/i915_prim_vbuf.c
index a8e97e7c30..f49f6d6ed1 100644
--- a/src/gallium/drivers/i915simple/i915_prim_vbuf.c
+++ b/src/gallium/drivers/i915simple/i915_prim_vbuf.c
@@ -42,7 +42,7 @@
 #include "draw/draw_vbuf.h"
 #include "pipe/p_debug.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 
diff --git a/src/gallium/drivers/i915simple/i915_screen.c b/src/gallium/drivers/i915simple/i915_screen.c
index 1c976082df..5bb127f3d5 100644
--- a/src/gallium/drivers/i915simple/i915_screen.c
+++ b/src/gallium/drivers/i915simple/i915_screen.c
@@ -27,7 +27,8 @@
 
 
 #include "util/u_memory.h"
-#include "pipe/p_winsys.h"
+#include "util/u_simple_screen.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_string.h"
 
@@ -279,6 +280,7 @@ i915_create_screen(struct pipe_winsys *winsys, uint pci_id)
    i915screen->screen.surface_unmap = i915_surface_unmap;
 
    i915_init_screen_texture_functions(&i915screen->screen);
+   u_simple_screen_init(&i915screen->screen);
 
    return &i915screen->screen;
 }
diff --git a/src/gallium/drivers/i915simple/i915_state.c b/src/gallium/drivers/i915simple/i915_state.c
index 19f194c027..273e74002a 100644
--- a/src/gallium/drivers/i915simple/i915_state.c
+++ b/src/gallium/drivers/i915simple/i915_state.c
@@ -30,7 +30,7 @@
 
 
 #include "draw/draw_context.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
@@ -537,7 +537,7 @@ static void i915_set_constant_buffer(struct pipe_context *pipe,
       void *mapped;
       if (buf->buffer && buf->buffer->size &&
           (mapped = ws->buffer_map(ws, buf->buffer,
-                                   PIPE_BUFFER_USAGE_CPU_READ))) {
+                                    PIPE_BUFFER_USAGE_CPU_READ))) {
          memcpy(i915->current.constants[shader], mapped, buf->buffer->size);
          ws->buffer_unmap(ws, buf->buffer);
          i915->current.num_user_constants[shader]
diff --git a/src/gallium/drivers/i915simple/i915_surface.c b/src/gallium/drivers/i915simple/i915_surface.c
index 3b3d9217a0..5ffdb76682 100644
--- a/src/gallium/drivers/i915simple/i915_surface.c
+++ b/src/gallium/drivers/i915simple/i915_surface.c
@@ -31,7 +31,7 @@
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_tile.h"
 #include "util/u_rect.h"
 
diff --git a/src/gallium/drivers/i915simple/i915_texture.c b/src/gallium/drivers/i915simple/i915_texture.c
index 4acc4b0214..803ef3a187 100644
--- a/src/gallium/drivers/i915simple/i915_texture.c
+++ b/src/gallium/drivers/i915simple/i915_texture.c
@@ -34,7 +34,7 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 
@@ -606,8 +606,8 @@ i915_texture_create(struct pipe_screen *screen,
    tex_size = tex->stride * tex->total_nblocksy;
 
    tex->buffer = ws->buffer_create(ws, 64,
-				   PIPE_BUFFER_USAGE_PIXEL,
-				   tex_size);
+                                    PIPE_BUFFER_USAGE_PIXEL,
+                                    tex_size);
 
    if (!tex->buffer)
       goto fail;
diff --git a/src/gallium/drivers/i965simple/brw_blit.c b/src/gallium/drivers/i965simple/brw_blit.c
index 8494f70493..4d11f8d2ab 100644
--- a/src/gallium/drivers/i965simple/brw_blit.c
+++ b/src/gallium/drivers/i965simple/brw_blit.c
@@ -35,7 +35,7 @@
 #include "brw_reg.h"
 
 #include "pipe/p_context.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #define FILE_DEBUG_FLAG DEBUG_BLIT
 
diff --git a/src/gallium/drivers/i965simple/brw_context.c b/src/gallium/drivers/i965simple/brw_context.c
index 96920df008..c74cbf8d73 100644
--- a/src/gallium/drivers/i965simple/brw_context.c
+++ b/src/gallium/drivers/i965simple/brw_context.c
@@ -37,7 +37,7 @@
 #include "brw_tex_layout.h"
 #include "brw_winsys.h"
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_context.h"
 #include "util/u_memory.h"
 #include "pipe/p_screen.h"
diff --git a/src/gallium/drivers/i965simple/brw_curbe.c b/src/gallium/drivers/i965simple/brw_curbe.c
index 5e1cce7530..904cde8e30 100644
--- a/src/gallium/drivers/i965simple/brw_curbe.c
+++ b/src/gallium/drivers/i965simple/brw_curbe.c
@@ -38,7 +38,7 @@
 #include "brw_util.h"
 #include "brw_wm.h"
 #include "pipe/p_state.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 
diff --git a/src/gallium/drivers/i965simple/brw_draw.c b/src/gallium/drivers/i965simple/brw_draw.c
index 7598e3dc8a..648aaa0da5 100644
--- a/src/gallium/drivers/i965simple/brw_draw.c
+++ b/src/gallium/drivers/i965simple/brw_draw.c
@@ -34,7 +34,7 @@
 #include "brw_state.h"
 
 #include "pipe/p_context.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 static unsigned hw_prim[PIPE_PRIM_POLYGON+1] = {
    _3DPRIM_POINTLIST,
diff --git a/src/gallium/drivers/i965simple/brw_screen.c b/src/gallium/drivers/i965simple/brw_screen.c
index ab7cd624b2..b22e105f10 100644
--- a/src/gallium/drivers/i965simple/brw_screen.c
+++ b/src/gallium/drivers/i965simple/brw_screen.c
@@ -27,8 +27,9 @@
 
 
 #include "util/u_memory.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_string.h"
+#include "util/u_simple_screen.h"
 
 #include "brw_context.h"
 #include "brw_screen.h"
@@ -239,6 +240,7 @@ brw_create_screen(struct pipe_winsys *winsys, uint pci_id)
    brwscreen->screen.is_format_supported = brw_is_format_supported;
 
    brw_init_screen_texture_funcs(&brwscreen->screen);
+   u_simple_screen_init(&brwscreen->screen);
 
    return &brwscreen->screen;
 }
diff --git a/src/gallium/drivers/i965simple/brw_state.c b/src/gallium/drivers/i965simple/brw_state.c
index af46cb546f..b47f5373f3 100644
--- a/src/gallium/drivers/i965simple/brw_state.c
+++ b/src/gallium/drivers/i965simple/brw_state.c
@@ -30,7 +30,7 @@
  */
 
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_memory.h"
 #include "pipe/p_inlines.h"
 #include "pipe/p_shader_tokens.h"
diff --git a/src/gallium/drivers/i965simple/brw_state_pool.c b/src/gallium/drivers/i965simple/brw_state_pool.c
index 007dc8f9de..e91263cb1f 100644
--- a/src/gallium/drivers/i965simple/brw_state_pool.c
+++ b/src/gallium/drivers/i965simple/brw_state_pool.c
@@ -42,7 +42,7 @@
  * the pool.
  */
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 #include "pipe/p_inlines.h"
diff --git a/src/gallium/drivers/i965simple/brw_surface.c b/src/gallium/drivers/i965simple/brw_surface.c
index b89756c47b..3159eba2fd 100644
--- a/src/gallium/drivers/i965simple/brw_surface.c
+++ b/src/gallium/drivers/i965simple/brw_surface.c
@@ -30,7 +30,7 @@
 #include "brw_state.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_tile.h"
 #include "util/u_rect.h"
 
diff --git a/src/gallium/drivers/i965simple/brw_tex_layout.c b/src/gallium/drivers/i965simple/brw_tex_layout.c
index 12e2e02cfd..6af0d5cf4b 100644
--- a/src/gallium/drivers/i965simple/brw_tex_layout.c
+++ b/src/gallium/drivers/i965simple/brw_tex_layout.c
@@ -37,7 +37,7 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 #include "brw_context.h"
@@ -296,9 +296,9 @@ brw_texture_create_screen(struct pipe_screen *screen,
    
       if (brw_miptree_layout(tex))
 	 tex->buffer = ws->buffer_create(ws, 64,
-                                         PIPE_BUFFER_USAGE_PIXEL,
-                                         tex->stride *
-                                         tex->total_nblocksy);
+                                          PIPE_BUFFER_USAGE_PIXEL,
+                                          tex->stride *
+                                          tex->total_nblocksy);
 
       if (!tex->buffer) {
 	 FREE(tex);
@@ -322,7 +322,6 @@ brw_texture_release_screen(struct pipe_screen *screen,
        __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
    */
    if (--(*pt)->refcount <= 0) {
-      struct pipe_winsys *ws = screen->winsys;
       struct brw_texture *tex = (struct brw_texture *)*pt;
       uint i;
 
@@ -330,7 +329,7 @@ brw_texture_release_screen(struct pipe_screen *screen,
       DBG("%s deleting %p\n", __FUNCTION__, (void *) tex);
       */
 
-      winsys_buffer_reference(ws, &tex->buffer, NULL);
+      pipe_buffer_reference(screen, &tex->buffer, NULL);
 
       for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
          if (tex->image_offset[i])
@@ -347,7 +346,6 @@ brw_get_tex_surface_screen(struct pipe_screen *screen,
                            struct pipe_texture *pt,
                            unsigned face, unsigned level, unsigned zslice)
 {
-   struct pipe_winsys *ws = screen->winsys;
    struct brw_texture *tex = (struct brw_texture *)pt;
    struct pipe_surface *ps;
    unsigned offset;  /* in bytes */
@@ -369,7 +367,7 @@ brw_get_tex_surface_screen(struct pipe_screen *screen,
    if (ps) {
       ps->refcount = 1;
       pipe_texture_reference(&ps->texture, pt);
-      winsys_buffer_reference(ws, &ps->buffer, tex->buffer);
+      pipe_buffer_reference(screen, &ps->buffer, tex->buffer);
       ps->format = pt->format;
       ps->width = pt->width[level];
       ps->height = pt->height[level];
diff --git a/src/gallium/drivers/nouveau/nouveau_winsys.h b/src/gallium/drivers/nouveau/nouveau_winsys.h
index 5535ebb6a9..25e0b05be1 100644
--- a/src/gallium/drivers/nouveau/nouveau_winsys.h
+++ b/src/gallium/drivers/nouveau/nouveau_winsys.h
@@ -2,7 +2,7 @@
 #define NOUVEAU_WINSYS_H
 
 #include <stdint.h>
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_defines.h"
 
 #include "nouveau/nouveau_bo.h"
diff --git a/src/gallium/drivers/nv04/nv04_context.c b/src/gallium/drivers/nv04/nv04_context.c
index 7e4ee004b0..d6710cd892 100644
--- a/src/gallium/drivers/nv04/nv04_context.c
+++ b/src/gallium/drivers/nv04/nv04_context.c
@@ -1,6 +1,6 @@
 #include "draw/draw_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv04_context.h"
 #include "nv04_screen.h"
diff --git a/src/gallium/drivers/nv04/nv04_prim_vbuf.c b/src/gallium/drivers/nv04/nv04_prim_vbuf.c
index 19979fff79..18a8872ae3 100644
--- a/src/gallium/drivers/nv04/nv04_prim_vbuf.c
+++ b/src/gallium/drivers/nv04/nv04_prim_vbuf.c
@@ -1,7 +1,7 @@
 
 #include "pipe/p_debug.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_compiler.h"
 
 #include "draw/draw_vbuf.h"
diff --git a/src/gallium/drivers/nv04/nv04_screen.c b/src/gallium/drivers/nv04/nv04_screen.c
index 0b282ae3a4..2ae6784077 100644
--- a/src/gallium/drivers/nv04/nv04_screen.c
+++ b/src/gallium/drivers/nv04/nv04_screen.c
@@ -1,4 +1,5 @@
 #include "pipe/p_screen.h"
+#include "util/u_simple_screen.h"
 
 #include "nv04_context.h"
 #include "nv04_screen.h"
@@ -215,6 +216,7 @@ nv04_screen_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws)
 	screen->pipe.surface_unmap = nv04_surface_unmap;
 
 	nv04_screen_init_miptree_functions(&screen->pipe);
+	u_simple_screen_init(&screen->pipe);
 
 	return &screen->pipe;
 }
diff --git a/src/gallium/drivers/nv04/nv04_surface.c b/src/gallium/drivers/nv04/nv04_surface.c
index 9d9943ed4e..0d0983f9d4 100644
--- a/src/gallium/drivers/nv04/nv04_surface.c
+++ b/src/gallium/drivers/nv04/nv04_surface.c
@@ -28,7 +28,7 @@
 
 #include "nv04_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_tile.h"
 
diff --git a/src/gallium/drivers/nv10/nv10_context.c b/src/gallium/drivers/nv10/nv10_context.c
index 4eb4ed9185..ef2c0c5d9f 100644
--- a/src/gallium/drivers/nv10/nv10_context.c
+++ b/src/gallium/drivers/nv10/nv10_context.c
@@ -1,6 +1,6 @@
 #include "draw/draw_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv10_context.h"
 #include "nv10_screen.h"
diff --git a/src/gallium/drivers/nv10/nv10_prim_vbuf.c b/src/gallium/drivers/nv10/nv10_prim_vbuf.c
index e7e81d3dff..7435d87315 100644
--- a/src/gallium/drivers/nv10/nv10_prim_vbuf.c
+++ b/src/gallium/drivers/nv10/nv10_prim_vbuf.c
@@ -40,7 +40,7 @@
 
 #include "pipe/p_debug.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv10_context.h"
 #include "nv10_state.h"
diff --git a/src/gallium/drivers/nv10/nv10_screen.c b/src/gallium/drivers/nv10/nv10_screen.c
index 4d9fbd4b5f..12516fd71e 100644
--- a/src/gallium/drivers/nv10/nv10_screen.c
+++ b/src/gallium/drivers/nv10/nv10_screen.c
@@ -1,4 +1,5 @@
 #include "pipe/p_screen.h"
+#include "util/u_simple_screen.h"
 
 #include "nv10_context.h"
 #include "nv10_screen.h"
@@ -204,6 +205,7 @@ nv10_screen_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws)
 	screen->pipe.surface_unmap = nv10_surface_unmap;
 
 	nv10_screen_init_miptree_functions(&screen->pipe);
+	u_simple_screen_init(&screen->pipe);
 
 	return &screen->pipe;
 }
diff --git a/src/gallium/drivers/nv10/nv10_surface.c b/src/gallium/drivers/nv10/nv10_surface.c
index be44c7bed5..78fd7b42da 100644
--- a/src/gallium/drivers/nv10/nv10_surface.c
+++ b/src/gallium/drivers/nv10/nv10_surface.c
@@ -28,7 +28,7 @@
 
 #include "nv10_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_tile.h"
 
diff --git a/src/gallium/drivers/nv20/nv20_clear.c b/src/gallium/drivers/nv20/nv20_clear.c
index 81b6f3e78a..29f4afd87c 100644
--- a/src/gallium/drivers/nv20/nv20_clear.c
+++ b/src/gallium/drivers/nv20/nv20_clear.c
@@ -9,4 +9,5 @@ nv20_clear(struct pipe_context *pipe, struct pipe_surface *ps,
 	   unsigned clearValue)
 {
 	pipe->surface_fill(pipe, ps, 0, 0, ps->width, ps->height, clearValue);
+	ps->status = PIPE_SURFACE_STATUS_CLEAR;
 }
diff --git a/src/gallium/drivers/nv20/nv20_context.c b/src/gallium/drivers/nv20/nv20_context.c
index c8fb690ee9..1659aec8fa 100644
--- a/src/gallium/drivers/nv20/nv20_context.c
+++ b/src/gallium/drivers/nv20/nv20_context.c
@@ -1,6 +1,6 @@
 #include "draw/draw_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv20_context.h"
 #include "nv20_screen.h"
@@ -263,7 +263,7 @@ static void nv20_init_hwctx(struct nv20_context *nv20)
 	BEGIN_RING(kelvin, NV20TCL_DEPTH_FUNC, 1);
 	OUT_RING  (NV20TCL_DEPTH_FUNC_LESS);
 	BEGIN_RING(kelvin, NV20TCL_DEPTH_WRITE_ENABLE, 1);
-	OUT_RING  (1);
+	OUT_RING  (0);
 	BEGIN_RING(kelvin, NV20TCL_DEPTH_TEST_ENABLE, 1);
 	OUT_RING  (0);
 	BEGIN_RING(kelvin, NV20TCL_POLYGON_OFFSET_FACTOR, 2);
@@ -349,7 +349,7 @@ static void nv20_init_hwctx(struct nv20_context *nv20)
 	memset(projectionmatrix, 0, sizeof(projectionmatrix));
 	projectionmatrix[0*4+0] = 1.0;
 	projectionmatrix[1*4+1] = 1.0;
-	projectionmatrix[2*4+2] = 1.0;
+	projectionmatrix[2*4+2] = 16777215.0;
 	projectionmatrix[3*4+3] = 1.0;
 	BEGIN_RING(kelvin, NV20TCL_PROJECTION_MATRIX(0), 16);
 	for (i = 0; i < 16; i++) {
@@ -357,20 +357,20 @@ static void nv20_init_hwctx(struct nv20_context *nv20)
 	}
 
 	BEGIN_RING(kelvin, NV20TCL_DEPTH_RANGE_NEAR, 2);
-	OUT_RINGf  (0.0);
-	OUT_RINGf  (16777216.0); /* bpp dependant? */
+	OUT_RINGf (0.0);
+	OUT_RINGf (16777216.0); /* [0, 1] scaled approx to [0, 2^24] */
 
 	BEGIN_RING(kelvin, NV20TCL_VIEWPORT_SCALE0_X, 4);
-	OUT_RINGf  (0.0); /* x-offset */
-	OUT_RINGf  (0.0); /* y-offset */
-	OUT_RINGf  (16777215.0 * 0.5);
-	OUT_RING  (0);
+	OUT_RINGf (0.0); /* x-offset, w/2 + 1.031250 */
+	OUT_RINGf (0.0); /* y-offset, h/2 + 0.030762 */
+	OUT_RINGf (0.0);
+	OUT_RINGf (16777215.0);
 
 	BEGIN_RING(kelvin, NV20TCL_VIEWPORT_SCALE1_X, 4);
-	OUT_RINGf  (0.0); /* no effect? */
-	OUT_RINGf  (0.0); /* no effect? */
-	OUT_RINGf  (16777215.0 * 0.5);
-	OUT_RINGf  (65535.0);
+	OUT_RINGf (0.0); /* no effect?, w/2 */
+	OUT_RINGf (0.0); /* no effect?, h/2 */
+	OUT_RINGf (16777215.0 * 0.5);
+	OUT_RINGf (65535.0);
 
 	FIRE_RING (NULL);
 }
diff --git a/src/gallium/drivers/nv20/nv20_prim_vbuf.c b/src/gallium/drivers/nv20/nv20_prim_vbuf.c
index 74540845a8..4dd7052814 100644
--- a/src/gallium/drivers/nv20/nv20_prim_vbuf.c
+++ b/src/gallium/drivers/nv20/nv20_prim_vbuf.c
@@ -40,7 +40,7 @@
 
 #include "pipe/p_debug.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv20_context.h"
 #include "nv20_state.h"
diff --git a/src/gallium/drivers/nv20/nv20_screen.c b/src/gallium/drivers/nv20/nv20_screen.c
index 2ca6e6b149..f09b364b8d 100644
--- a/src/gallium/drivers/nv20/nv20_screen.c
+++ b/src/gallium/drivers/nv20/nv20_screen.c
@@ -1,4 +1,5 @@
 #include "pipe/p_screen.h"
+#include "util/u_simple_screen.h"
 
 #include "nv20_context.h"
 #include "nv20_screen.h"
@@ -200,6 +201,7 @@ nv20_screen_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws)
 	screen->pipe.surface_unmap = nv20_surface_unmap;
 
 	nv20_screen_init_miptree_functions(&screen->pipe);
+	u_simple_screen_init(&screen->pipe);
 
 	return &screen->pipe;
 }
diff --git a/src/gallium/drivers/nv20/nv20_state_emit.c b/src/gallium/drivers/nv20/nv20_state_emit.c
index cbdc674b09..ea20078a50 100644
--- a/src/gallium/drivers/nv20/nv20_state_emit.c
+++ b/src/gallium/drivers/nv20/nv20_state_emit.c
@@ -73,6 +73,9 @@ static void nv20_state_emit_dsa(struct nv20_context* nv20)
 	BEGIN_RING(kelvin, NV20TCL_DEPTH_TEST_ENABLE, 1);
 	OUT_RING (d->depth.test_enable);
 
+	BEGIN_RING(kelvin, NV20TCL_DEPTH_UNK17D8, 1);
+	OUT_RING (1);
+
 #if 0
 	BEGIN_RING(kelvin, NV20TCL_STENCIL_ENABLE, 1);
 	OUT_RING (d->stencil.enable);
@@ -352,16 +355,14 @@ nv20_emit_hw_state(struct nv20_context *nv20)
 	 */
 
 	/* Render target */
-/* XXX figre out who's who for NV10TCL_DMA_* and fill accordingly
- *	BEGIN_RING(kelvin, NV20TCL_DMA_COLOR0, 1);
- *	OUT_RELOCo(nv20->rt[0], NOUVEAU_BO_VRAM | NOUVEAU_BO_WR); */
+	BEGIN_RING(kelvin, NV20TCL_DMA_COLOR, 1);
+	OUT_RELOCo(nv20->rt[0], NOUVEAU_BO_VRAM | NOUVEAU_BO_WR);
 	BEGIN_RING(kelvin, NV20TCL_COLOR_OFFSET, 1);
 	OUT_RELOCl(nv20->rt[0], 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_WR);
 
 	if (nv20->zeta) {
-/* XXX
- *		BEGIN_RING(kelvin, NV20TCL_DMA_ZETA, 1);
- *		OUT_RELOCo(nv20->zeta, NOUVEAU_BO_VRAM | NOUVEAU_BO_WR); */
+		BEGIN_RING(kelvin, NV20TCL_DMA_ZETA, 1);
+		OUT_RELOCo(nv20->zeta, NOUVEAU_BO_VRAM | NOUVEAU_BO_WR);
 		BEGIN_RING(kelvin, NV20TCL_ZETA_OFFSET, 1);
 		OUT_RELOCl(nv20->zeta, 0, NOUVEAU_BO_VRAM | NOUVEAU_BO_WR);
 		/* XXX for when we allocate LMA on nv17 */
diff --git a/src/gallium/drivers/nv20/nv20_surface.c b/src/gallium/drivers/nv20/nv20_surface.c
index 7bc68d0ca2..9b4c028eae 100644
--- a/src/gallium/drivers/nv20/nv20_surface.c
+++ b/src/gallium/drivers/nv20/nv20_surface.c
@@ -28,7 +28,7 @@
 
 #include "nv20_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_tile.h"
 
diff --git a/src/gallium/drivers/nv20/nv20_vbo.c b/src/gallium/drivers/nv20/nv20_vbo.c
index 4edc4efebd..24d8f4bef0 100644
--- a/src/gallium/drivers/nv20/nv20_vbo.c
+++ b/src/gallium/drivers/nv20/nv20_vbo.c
@@ -64,6 +64,7 @@ boolean nv20_draw_elements( struct pipe_context *pipe,
 		draw_set_mapped_element_buffer(draw, 0, NULL);
 	}
 
+	draw_flush(nv20->draw);
 	return TRUE;
 }
 
diff --git a/src/gallium/drivers/nv30/nv30_context.c b/src/gallium/drivers/nv30/nv30_context.c
index 2bff28aca9..61654f8756 100644
--- a/src/gallium/drivers/nv30/nv30_context.c
+++ b/src/gallium/drivers/nv30/nv30_context.c
@@ -1,6 +1,6 @@
 #include "draw/draw_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv30_context.h"
 #include "nv30_screen.h"
diff --git a/src/gallium/drivers/nv30/nv30_miptree.c b/src/gallium/drivers/nv30/nv30_miptree.c
index 54fb3585f8..79baac714c 100644
--- a/src/gallium/drivers/nv30/nv30_miptree.c
+++ b/src/gallium/drivers/nv30/nv30_miptree.c
@@ -181,7 +181,7 @@ nv30_miptree_surface_del(struct pipe_screen *pscreen,
 		return;
 
 	pipe_texture_reference(&ps->texture, NULL);
-	pipe_buffer_reference(pscreen->winsys, &ps->buffer, NULL);
+	pipe_buffer_reference(pscreen, &ps->buffer, NULL);
 	FREE(ps);
 }
 
diff --git a/src/gallium/drivers/nv30/nv30_screen.c b/src/gallium/drivers/nv30/nv30_screen.c
index 1fac6d3df8..0f10d914ad 100644
--- a/src/gallium/drivers/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nv30/nv30_screen.c
@@ -1,4 +1,5 @@
 #include "pipe/p_screen.h"
+#include "util/u_simple_screen.h"
 
 #include "nv30_context.h"
 #include "nv30_screen.h"
@@ -381,6 +382,7 @@ nv30_screen_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws)
 	screen->pipe.surface_unmap = nv30_surface_unmap;
 
 	nv30_screen_init_miptree_functions(&screen->pipe);
+	u_simple_screen_init(&screen->pipe);
 
 	return &screen->pipe;
 }
diff --git a/src/gallium/drivers/nv30/nv30_surface.c b/src/gallium/drivers/nv30/nv30_surface.c
index d3376a73bf..806131dcc9 100644
--- a/src/gallium/drivers/nv30/nv30_surface.c
+++ b/src/gallium/drivers/nv30/nv30_surface.c
@@ -28,7 +28,7 @@
 
 #include "nv30_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 
 #include "util/u_tile.h"
diff --git a/src/gallium/drivers/nv40/nv40_context.c b/src/gallium/drivers/nv40/nv40_context.c
index cc63dd734b..5d325f5067 100644
--- a/src/gallium/drivers/nv40/nv40_context.c
+++ b/src/gallium/drivers/nv40/nv40_context.c
@@ -1,6 +1,6 @@
 #include "draw/draw_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv40_context.h"
 #include "nv40_screen.h"
diff --git a/src/gallium/drivers/nv40/nv40_draw.c b/src/gallium/drivers/nv40/nv40_draw.c
index 8e56cdc2fe..c83ff91d7e 100644
--- a/src/gallium/drivers/nv40/nv40_draw.c
+++ b/src/gallium/drivers/nv40/nv40_draw.c
@@ -242,7 +242,7 @@ nv40_draw_elements_swtnl(struct pipe_context *pipe,
 
 	for (i = 0; i < nv40->vtxbuf_nr; i++) {
 		map = ws->buffer_map(ws, nv40->vtxbuf[i].buffer,
-				     PIPE_BUFFER_USAGE_CPU_READ);
+                                      PIPE_BUFFER_USAGE_CPU_READ);
 		draw_set_mapped_vertex_buffer(nv40->draw, i, map);
 	}
 
diff --git a/src/gallium/drivers/nv40/nv40_screen.c b/src/gallium/drivers/nv40/nv40_screen.c
index ab128fecda..46fe133d71 100644
--- a/src/gallium/drivers/nv40/nv40_screen.c
+++ b/src/gallium/drivers/nv40/nv40_screen.c
@@ -1,4 +1,5 @@
 #include "pipe/p_screen.h"
+#include "util/u_simple_screen.h"
 
 #include "nv40_context.h"
 #include "nv40_screen.h"
@@ -363,6 +364,7 @@ nv40_screen_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws)
 	screen->pipe.surface_unmap = nv40_surface_unmap;
 
 	nv40_screen_init_miptree_functions(&screen->pipe);
+	u_simple_screen_init(&screen->pipe);
 
 	return &screen->pipe;
 }
diff --git a/src/gallium/drivers/nv40/nv40_surface.c b/src/gallium/drivers/nv40/nv40_surface.c
index 576af7c59e..aa51d04051 100644
--- a/src/gallium/drivers/nv40/nv40_surface.c
+++ b/src/gallium/drivers/nv40/nv40_surface.c
@@ -28,7 +28,7 @@
 
 #include "nv40_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 
 #include "util/u_tile.h"
diff --git a/src/gallium/drivers/nv50/nv50_context.c b/src/gallium/drivers/nv50/nv50_context.c
index b02c53f209..99776239d2 100644
--- a/src/gallium/drivers/nv50/nv50_context.c
+++ b/src/gallium/drivers/nv50/nv50_context.c
@@ -22,7 +22,7 @@
 
 #include "draw/draw_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 #include "nv50_context.h"
 #include "nv50_screen.h"
diff --git a/src/gallium/drivers/nv50/nv50_query.c b/src/gallium/drivers/nv50/nv50_query.c
index b923c820eb..1b3a41340a 100644
--- a/src/gallium/drivers/nv50/nv50_query.c
+++ b/src/gallium/drivers/nv50/nv50_query.c
@@ -62,7 +62,7 @@ nv50_query_destroy(struct pipe_context *pipe, struct pipe_query *pq)
 	struct nv50_query *q = nv50_query(pq);
 
 	if (q) {
-		pipe_buffer_reference(pipe, &q->buffer, NULL);
+		pipe_buffer_reference(pipe->screen, &q->buffer, NULL);
 		FREE(q);
 	}
 }
diff --git a/src/gallium/drivers/nv50/nv50_screen.c b/src/gallium/drivers/nv50/nv50_screen.c
index ef46233f83..6cddddacd5 100644
--- a/src/gallium/drivers/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nv50/nv50_screen.c
@@ -22,6 +22,8 @@
 
 #include "pipe/p_screen.h"
 
+#include "util/u_simple_screen.h"
+
 #include "nv50_context.h"
 #include "nv50_screen.h"
 
@@ -323,6 +325,7 @@ nv50_screen_create(struct pipe_winsys *ws, struct nouveau_winsys *nvws)
 
 	nv50_screen_init_miptree_functions(&screen->pipe);
 	nv50_surface_init_screen_functions(&screen->pipe);
+	u_simple_screen_init(&screen->pipe);
 
 	return &screen->pipe;
 }
diff --git a/src/gallium/drivers/nv50/nv50_surface.c b/src/gallium/drivers/nv50/nv50_surface.c
index 3f45a2fe18..ed6602ba36 100644
--- a/src/gallium/drivers/nv50/nv50_surface.c
+++ b/src/gallium/drivers/nv50/nv50_surface.c
@@ -22,7 +22,7 @@
 
 #include "nv50_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 
 #include "util/u_tile.h"
diff --git a/src/gallium/drivers/softpipe/sp_context.c b/src/gallium/drivers/softpipe/sp_context.c
index d8a5631488..c2d882a819 100644
--- a/src/gallium/drivers/softpipe/sp_context.c
+++ b/src/gallium/drivers/softpipe/sp_context.c
@@ -87,7 +87,7 @@ softpipe_unmap_surfaces(struct softpipe_context *sp)
 static void softpipe_destroy( struct pipe_context *pipe )
 {
    struct softpipe_context *softpipe = softpipe_context( pipe );
-   struct pipe_winsys *ws = pipe->winsys;
+   struct pipe_screen *screen = pipe->screen;
    uint i;
 
    if (softpipe->draw)
@@ -116,7 +116,7 @@ static void softpipe_destroy( struct pipe_context *pipe )
 
    for (i = 0; i < Elements(softpipe->constants); i++) {
       if (softpipe->constants[i].buffer) {
-         winsys_buffer_reference(ws, &softpipe->constants[i].buffer, NULL);
+         pipe_buffer_reference(screen, &softpipe->constants[i].buffer, NULL);
       }
    }
 
diff --git a/src/gallium/drivers/softpipe/sp_draw_arrays.c b/src/gallium/drivers/softpipe/sp_draw_arrays.c
index ed3e8f95ae..ecc9d00319 100644
--- a/src/gallium/drivers/softpipe/sp_draw_arrays.c
+++ b/src/gallium/drivers/softpipe/sp_draw_arrays.c
@@ -33,7 +33,7 @@
 
 #include "pipe/p_defines.h"
 #include "pipe/p_context.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 
 #include "sp_context.h"
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index 11b08b3a82..7380a6ae2b 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -27,7 +27,8 @@
 
 
 #include "util/u_memory.h"
-#include "pipe/p_winsys.h"
+#include "util/u_simple_screen.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_screen.h"
 
@@ -174,6 +175,7 @@ softpipe_create_screen(struct pipe_winsys *winsys)
    screen->base.is_format_supported = softpipe_is_format_supported;
 
    softpipe_init_screen_texture_funcs(&screen->base);
+   u_simple_screen_init(&screen->base);
 
    return &screen->base;
 }
diff --git a/src/gallium/drivers/softpipe/sp_state_fs.c b/src/gallium/drivers/softpipe/sp_state_fs.c
index 15815160ed..4d01a9dbe1 100644
--- a/src/gallium/drivers/softpipe/sp_state_fs.c
+++ b/src/gallium/drivers/softpipe/sp_state_fs.c
@@ -32,7 +32,7 @@
 #include "pipe/p_defines.h"
 #include "util/u_memory.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_shader_tokens.h"
 #include "draw/draw_context.h"
 #include "tgsi/tgsi_dump.h"
@@ -146,13 +146,13 @@ softpipe_set_constant_buffer(struct pipe_context *pipe,
                              const struct pipe_constant_buffer *buf)
 {
    struct softpipe_context *softpipe = softpipe_context(pipe);
-   struct pipe_winsys *ws = pipe->winsys;
+   struct pipe_screen *screen = pipe->screen;
 
    assert(shader < PIPE_SHADER_TYPES);
    assert(index == 0);
 
    /* note: reference counting */
-   winsys_buffer_reference(ws,
+   pipe_buffer_reference(screen,
 			 &softpipe->constants[shader].buffer,
 			 buf ? buf->buffer : NULL);
 
diff --git a/src/gallium/drivers/softpipe/sp_texture.c b/src/gallium/drivers/softpipe/sp_texture.c
index faf9e871f9..5952378152 100644
--- a/src/gallium/drivers/softpipe/sp_texture.c
+++ b/src/gallium/drivers/softpipe/sp_texture.c
@@ -33,7 +33,7 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 
@@ -106,11 +106,11 @@ softpipe_displaytarget_layout(struct pipe_screen *screen,
    spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);  
 
    spt->buffer = ws->surface_buffer_create( ws, 
-                                           spt->base.width[0], 
-                                           spt->base.height[0],
-                                           spt->base.format,
-                                           usage,
-                                           &spt->stride[0]);
+                                            spt->base.width[0], 
+                                            spt->base.height[0],
+                                            spt->base.format,
+                                            usage,
+                                            &spt->stride[0]);
 
    return spt->buffer != NULL;
 }
diff --git a/src/gallium/drivers/trace/tr_winsys.h b/src/gallium/drivers/trace/tr_winsys.h
index 062ddf66a0..0fd2a40556 100644
--- a/src/gallium/drivers/trace/tr_winsys.h
+++ b/src/gallium/drivers/trace/tr_winsys.h
@@ -31,7 +31,7 @@
 
 #include "pipe/p_compiler.h"
 #include "pipe/p_debug.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 
 /**
diff --git a/src/gallium/include/pipe/p_winsys.h b/src/gallium/include/pipe/internal/p_winsys_screen.h
index 3ae83e8105..ee835578b2 100644
--- a/src/gallium/include/pipe/p_winsys.h
+++ b/src/gallium/include/pipe/internal/p_winsys_screen.h
@@ -36,7 +36,7 @@
 #define P_WINSYS_H
 
 
-#include "p_format.h"
+#include "pipe/p_format.h"
 
 
 #ifdef __cplusplus
@@ -178,7 +178,6 @@ struct pipe_winsys
 
 };
 
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/gallium/include/pipe/p_inlines.h b/src/gallium/include/pipe/p_inlines.h
index 7378392616..1219c817b4 100644
--- a/src/gallium/include/pipe/p_inlines.h
+++ b/src/gallium/include/pipe/p_inlines.h
@@ -31,7 +31,6 @@
 #include "p_context.h"
 #include "p_defines.h"
 #include "p_screen.h"
-#include "p_winsys.h"
 
 
 #ifdef __cplusplus
@@ -89,29 +88,6 @@ pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
 }
 
 
-/* XXX: thread safety issues!
- */
-static INLINE void
-winsys_buffer_reference(struct pipe_winsys *winsys,
-		      struct pipe_buffer **ptr,
-		      struct pipe_buffer *buf)
-{
-   if (buf) {
-      assert(buf->refcount);
-      buf->refcount++;
-   }
-
-   if (*ptr) {
-      assert((*ptr)->refcount);
-      if(--(*ptr)->refcount == 0)
-         winsys->buffer_destroy( winsys, *ptr );
-   }
-
-   *ptr = buf;
-}
-
-
-
 /**
  * \sa pipe_surface_reference
  */
@@ -152,20 +128,20 @@ pipe_texture_release(struct pipe_texture **ptr)
 
 
 /**
- * Convenience wrappers for winsys buffer functions.
+ * Convenience wrappers for screen buffer functions.
  */
 
 static INLINE struct pipe_buffer *
 pipe_buffer_create( struct pipe_screen *screen,
                     unsigned alignment, unsigned usage, unsigned size )
 {
-   return screen->winsys->buffer_create(screen->winsys, alignment, usage, size);
+   return screen->buffer_create(screen, alignment, usage, size);
 }
 
 static INLINE struct pipe_buffer *
 pipe_user_buffer_create( struct pipe_screen *screen, void *ptr, unsigned size )
 {
-   return screen->winsys->user_buffer_create(screen->winsys, ptr, size);
+   return screen->user_buffer_create(screen, ptr, size);
 }
 
 static INLINE void *
@@ -173,25 +149,36 @@ pipe_buffer_map(struct pipe_screen *screen,
                 struct pipe_buffer *buf,
                 unsigned usage)
 {
-   return screen->winsys->buffer_map(screen->winsys, buf, usage);
+   return screen->buffer_map(screen, buf, usage);
 }
 
 static INLINE void
 pipe_buffer_unmap(struct pipe_screen *screen,
                   struct pipe_buffer *buf)
 {
-   screen->winsys->buffer_unmap(screen->winsys, buf);
+   screen->buffer_unmap(screen, buf);
 }
 
-/* XXX when we're using this everywhere, get rid of
- * winsys_buffer_reference() above.
+/* XXX: thread safety issues!
  */
 static INLINE void
 pipe_buffer_reference(struct pipe_screen *screen,
 		      struct pipe_buffer **ptr,
 		      struct pipe_buffer *buf)
 {
-   winsys_buffer_reference(screen->winsys, ptr, buf);
+   if (buf) {
+      assert(buf->refcount);
+      buf->refcount++;
+   }
+
+   if (*ptr) {
+      assert((*ptr)->refcount);
+      if(--(*ptr)->refcount == 0) {
+         screen->buffer_destroy( screen, *ptr );
+      }
+   }
+
+   *ptr = buf;
 }
 
 
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 492667c93a..0bd7d12e22 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -48,6 +48,8 @@ extern "C" {
 #endif
 
 
+/** Opaque type */
+struct pipe_fence_handle;
 
 /**
  * Gallium screen/adapter context.  Basically everything
@@ -128,7 +130,108 @@ struct pipe_screen {
 
    void (*surface_unmap)( struct pipe_screen *,
                           struct pipe_surface *surface );
-   
+
+
+   /**
+    * Buffer management. Buffer attributes are mostly fixed over its lifetime.
+    *
+    */
+   struct pipe_buffer *(*buffer_create)( struct pipe_screen *screen,
+                                         unsigned alignment,
+                                         unsigned usage,
+                                         unsigned size );
+
+   /**
+    * Create a buffer that wraps user-space data.
+    *
+    * Effectively this schedules a delayed call to buffer_create
+    * followed by an upload of the data at *some point in the future*,
+    * or perhaps never.  Basically the allocate/upload is delayed
+    * until the buffer is actually passed to hardware.
+    *
+    * The intention is to provide a quick way to turn regular data
+    * into a buffer, and secondly to avoid a copy operation if that
+    * data subsequently turns out to be only accessed by the CPU.
+    *
+    * Common example is OpenGL vertex buffers that are subsequently
+    * processed either by software TNL in the driver or by passing to
+    * hardware.
+    *
+    * XXX: What happens if the delayed call to buffer_create() fails?
+    *
+    * Note that ptr may be accessed at any time upto the time when the
+    * buffer is destroyed, so the data must not be freed before then.
+    */
+   struct pipe_buffer *(*user_buffer_create)(struct pipe_screen *screen,
+                                             void *ptr,
+                                             unsigned bytes);
+
+   /**
+    * Allocate storage for a display target surface.
+    *
+    * Often surfaces which are meant to be blitted to the front screen (i.e.,
+    * display targets) must be allocated with special characteristics, memory
+    * pools, or obtained directly from the windowing system.
+    *
+    * This callback is invoked by the pipe_screenwhen creating a texture marked
+    * with the PIPE_TEXTURE_USAGE_DISPLAY_TARGET flag  to get the underlying
+    * buffer storage.
+    */
+   struct pipe_buffer *(*surface_buffer_create)(struct pipe_screen *screen,
+						unsigned width, unsigned height,
+						enum pipe_format format,
+						unsigned usage,
+						unsigned *stride);
+
+
+   /**
+    * Map the entire data store of a buffer object into the client's address.
+    * flags is bitmask of PIPE_BUFFER_USAGE_CPU_READ/WRITE flags.
+    */
+   void *(*buffer_map)( struct pipe_screen *screen,
+			struct pipe_buffer *buf,
+			unsigned usage );
+
+   void (*buffer_unmap)( struct pipe_screen *screen,
+			 struct pipe_buffer *buf );
+
+   void (*buffer_destroy)( struct pipe_screen *screen,
+			   struct pipe_buffer *buf );
+
+
+   /**
+    * Do any special operations to ensure frontbuffer contents are
+    * displayed, eg copy fake frontbuffer.
+    */
+   void (*flush_frontbuffer)( struct pipe_screen *screen,
+                              struct pipe_surface *surf,
+                              void *context_private );
+
+
+
+   /** Set ptr = fence, with reference counting */
+   void (*fence_reference)( struct pipe_screen *screen,
+                            struct pipe_fence_handle **ptr,
+                            struct pipe_fence_handle *fence );
+
+   /**
+    * Checks whether the fence has been signalled.
+    * \param flags  driver-specific meaning
+    * \return zero on success.
+    */
+   int (*fence_signalled)( struct pipe_screen *screen,
+                           struct pipe_fence_handle *fence,
+                           unsigned flag );
+
+   /**
+    * Wait for the fence to finish.
+    * \param flags  driver-specific meaning
+    * \return zero on success.
+    */
+   int (*fence_finish)( struct pipe_screen *screen,
+                        struct pipe_fence_handle *fence,
+                        unsigned flag );
+
 };
 
 
diff --git a/src/gallium/state_trackers/egl/egl_context.c b/src/gallium/state_trackers/egl/egl_context.c
index 217fe00338..8564972b91 100644
--- a/src/gallium/state_trackers/egl/egl_context.c
+++ b/src/gallium/state_trackers/egl/egl_context.c
@@ -10,7 +10,6 @@
 
 #include "pipe/p_context.h"
 #include "pipe/p_screen.h"
-#include "pipe/p_winsys.h"
 
 #include "state_tracker/st_public.h"
 #include "state_tracker/drm_api.h"
diff --git a/src/gallium/state_trackers/egl/egl_tracker.c b/src/gallium/state_trackers/egl/egl_tracker.c
index 3ca5acb68b..dec82c3a00 100644
--- a/src/gallium/state_trackers/egl/egl_tracker.c
+++ b/src/gallium/state_trackers/egl/egl_tracker.c
@@ -10,7 +10,7 @@
 #include "state_tracker/drm_api.h"
 
 #include "pipe/p_screen.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 
 /** HACK */
 void* driDriverAPI;
diff --git a/src/gallium/state_trackers/g3dvl/vl_basic_csc.c b/src/gallium/state_trackers/g3dvl/vl_basic_csc.c
index 53ef275349..122c42ed0e 100644
--- a/src/gallium/state_trackers/g3dvl/vl_basic_csc.c
+++ b/src/gallium/state_trackers/g3dvl/vl_basic_csc.c
@@ -2,7 +2,6 @@
 #include "vl_basic_csc.h"
 #include <assert.h>
 #include <pipe/p_context.h>
-#include <pipe/p_winsys.h>
 #include <pipe/p_state.h>
 #include <pipe/p_inlines.h>
 #include <tgsi/tgsi_parse.h>
diff --git a/src/gallium/state_trackers/g3dvl/vl_r16snorm_mc_buf.c b/src/gallium/state_trackers/g3dvl/vl_r16snorm_mc_buf.c
index 789042f6f2..d53482f579 100644
--- a/src/gallium/state_trackers/g3dvl/vl_r16snorm_mc_buf.c
+++ b/src/gallium/state_trackers/g3dvl/vl_r16snorm_mc_buf.c
@@ -2,7 +2,6 @@
 #include "vl_r16snorm_mc_buf.h"
 #include <assert.h>
 #include <pipe/p_context.h>
-#include <pipe/p_winsys.h>
 #include <pipe/p_screen.h>
 #include <pipe/p_state.h>
 #include <pipe/p_inlines.h>
@@ -649,9 +648,9 @@ static int vlFlush
 
 	pipe->set_framebuffer_state(pipe, &mc->render_target);
 	pipe->set_viewport_state(pipe, &mc->viewport);
-	vs_consts = pipe->winsys->buffer_map
+	vs_consts = pipe_buffer_map
 	(
-		pipe->winsys,
+		pipe->screen,
 		mc->vs_const_buf.buffer,
 		PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_DISCARD
 	);
diff --git a/src/gallium/state_trackers/python/st_device.c b/src/gallium/state_trackers/python/st_device.c
index 95c1378a03..20dd8d269d 100644
--- a/src/gallium/state_trackers/python/st_device.c
+++ b/src/gallium/state_trackers/python/st_device.c
@@ -26,7 +26,7 @@
  **************************************************************************/
 
 
-#include "pipe/p_winsys.h"
+#include "pipe/p_screen.h"
 #include "pipe/p_context.h"
 #include "pipe/p_shader_tokens.h"
 #include "pipe/p_inlines.h"
diff --git a/src/gallium/state_trackers/python/st_softpipe_winsys.c b/src/gallium/state_trackers/python/st_softpipe_winsys.c
index 01d88ee499..4d798df99b 100644
--- a/src/gallium/state_trackers/python/st_softpipe_winsys.c
+++ b/src/gallium/state_trackers/python/st_softpipe_winsys.c
@@ -36,7 +36,7 @@
  */
 
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"/* port to just p_screen */
 #include "pipe/p_format.h"
 #include "pipe/p_context.h"
 #include "pipe/p_inlines.h"
diff --git a/src/gallium/winsys/drm/intel/common/intel_be_device.c b/src/gallium/winsys/drm/intel/common/intel_be_device.c
index 14aeaf61db..85ab1a2684 100644
--- a/src/gallium/winsys/drm/intel/common/intel_be_device.c
+++ b/src/gallium/winsys/drm/intel/common/intel_be_device.c
@@ -10,7 +10,7 @@
 #include "ws_dri_bufpool.h"
 #include "ws_dri_fencemgr.h"
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_state.h"
 #include "pipe/p_inlines.h"
diff --git a/src/gallium/winsys/drm/intel/common/intel_be_device.h b/src/gallium/winsys/drm/intel/common/intel_be_device.h
index 3f8b3f585c..534d638b6a 100644
--- a/src/gallium/winsys/drm/intel/common/intel_be_device.h
+++ b/src/gallium/winsys/drm/intel/common/intel_be_device.h
@@ -1,7 +1,7 @@
 #ifndef INTEL_DRM_DEVICE_H
 #define INTEL_DRM_DEVICE_H
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_context.h"
 
 /*
diff --git a/src/gallium/winsys/drm/intel/gem/intel_be_device.c b/src/gallium/winsys/drm/intel/gem/intel_be_device.c
index 5406636bcb..82c1cb2f32 100644
--- a/src/gallium/winsys/drm/intel/gem/intel_be_device.c
+++ b/src/gallium/winsys/drm/intel/gem/intel_be_device.c
@@ -1,7 +1,7 @@
 
 #include "intel_be_device.h"
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_state.h"
 #include "pipe/p_inlines.h"
diff --git a/src/gallium/winsys/drm/intel/gem/intel_be_device.h b/src/gallium/winsys/drm/intel/gem/intel_be_device.h
index 96e94c47e7..f06890163c 100644
--- a/src/gallium/winsys/drm/intel/gem/intel_be_device.h
+++ b/src/gallium/winsys/drm/intel/gem/intel_be_device.h
@@ -2,7 +2,7 @@
 #ifndef INTEL_DRM_DEVICE_H
 #define INTEL_DRM_DEVICE_H
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_context.h"
 
 #include "drm.h"
diff --git a/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.c b/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.c
index 5b3101fbba..8e889b9f36 100644
--- a/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.c
+++ b/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.c
@@ -1,4 +1,4 @@
-#include <pipe/p_winsys.h>
+#include "pipe/internal/p_winsys_screen.h"
 #include <pipe/p_defines.h>
 #include <pipe/p_inlines.h>
 #include <util/u_memory.h>
diff --git a/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.h b/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.h
index 14c728690d..d97ffdf337 100644
--- a/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.h
+++ b/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_pipe.h
@@ -2,7 +2,7 @@
 #define NOUVEAU_PIPE_WINSYS_H
 
 #include "pipe/p_context.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "nouveau_context.h"
 
 struct nouveau_pipe_buffer {
diff --git a/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_softpipe.c b/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_softpipe.c
index 04def600f4..396e4f2a2e 100644
--- a/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_softpipe.c
+++ b/src/gallium/winsys/drm/nouveau/common/nouveau_winsys_softpipe.c
@@ -29,7 +29,7 @@
  * Authors: Keith Whitwell <keithw-at-tungstengraphics-dot-com>
  */
 
-#include <pipe/p_winsys.h>
+#include "pipe/internal/p_winsys_screen.h"
 #include <pipe/p_screen.h>
 #include <pipe/p_defines.h>
 #include <pipe/p_format.h>
diff --git a/src/gallium/winsys/egl_xlib/egl_xlib.c b/src/gallium/winsys/egl_xlib/egl_xlib.c
index 82aa60ae58..4876339107 100644
--- a/src/gallium/winsys/egl_xlib/egl_xlib.c
+++ b/src/gallium/winsys/egl_xlib/egl_xlib.c
@@ -38,7 +38,7 @@
 #include "pipe/p_compiler.h"
 #include "pipe/p_format.h"
 #include "pipe/p_state.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_memory.h"
 #include "softpipe/sp_winsys.h"
 
diff --git a/src/gallium/winsys/egl_xlib/sw_winsys.c b/src/gallium/winsys/egl_xlib/sw_winsys.c
index a09ad5e8e9..739bfa1c1a 100644
--- a/src/gallium/winsys/egl_xlib/sw_winsys.c
+++ b/src/gallium/winsys/egl_xlib/sw_winsys.c
@@ -35,7 +35,7 @@
  */
 
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_state.h"
 #include "pipe/p_inlines.h"
 #include "util/u_math.h"
diff --git a/src/gallium/winsys/gdi/gdi_softpipe_winsys.c b/src/gallium/winsys/gdi/gdi_softpipe_winsys.c
index cc12007193..1abe84b6a0 100644
--- a/src/gallium/winsys/gdi/gdi_softpipe_winsys.c
+++ b/src/gallium/winsys/gdi/gdi_softpipe_winsys.c
@@ -38,7 +38,7 @@
 
 #include <windows.h>
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_format.h"
 #include "pipe/p_context.h"
 #include "pipe/p_inlines.h"
@@ -268,7 +268,7 @@ gdi_softpipe_context_create(struct pipe_screen *screen)
 
 
 static void
-gdi_softpipe_flush_frontbuffer(struct pipe_winsys *winsys,
+gdi_softpipe_flush_frontbuffer(struct pipe_screen *screen,
                                struct pipe_surface *surface,
                                HDC hDC)
 {
diff --git a/src/gallium/winsys/xlib/xlib_brw_context.c b/src/gallium/winsys/xlib/xlib_brw_context.c
index 528473925a..09599507f4 100644
--- a/src/gallium/winsys/xlib/xlib_brw_context.c
+++ b/src/gallium/winsys/xlib/xlib_brw_context.c
@@ -36,7 +36,7 @@
 //#include "glxheader.h"
 //#include "xmesaP.h"
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
diff --git a/src/gallium/winsys/xlib/xlib_brw_screen.c b/src/gallium/winsys/xlib/xlib_brw_screen.c
index 1fd7da8a2f..5344c502ef 100644
--- a/src/gallium/winsys/xlib/xlib_brw_screen.c
+++ b/src/gallium/winsys/xlib/xlib_brw_screen.c
@@ -36,7 +36,7 @@
 //#include "state_trackers/xlib/glxheader.h"
 //#include "state_trackers/xlib/xmesaP.h"
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_inlines.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
diff --git a/src/gallium/winsys/xlib/xlib_cell.c b/src/gallium/winsys/xlib/xlib_cell.c
index 5af9ee3bb5..bf69593c5c 100644
--- a/src/gallium/winsys/xlib/xlib_cell.c
+++ b/src/gallium/winsys/xlib/xlib_cell.c
@@ -41,7 +41,7 @@
 #undef ASSERT
 #undef Elements
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_format.h"
 #include "pipe/p_context.h"
 #include "pipe/p_inlines.h"
diff --git a/src/gallium/winsys/xlib/xlib_softpipe.c b/src/gallium/winsys/xlib/xlib_softpipe.c
index c0bf37050a..01d24584e2 100644
--- a/src/gallium/winsys/xlib/xlib_softpipe.c
+++ b/src/gallium/winsys/xlib/xlib_softpipe.c
@@ -38,7 +38,7 @@
 #undef ASSERT
 #undef Elements
 
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "pipe/p_format.h"
 #include "pipe/p_context.h"
 #include "pipe/p_inlines.h"
diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index 0c69e16623..d18946de7d 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -42,7 +42,7 @@
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/p_screen.h"
 #include "st_context.h"
 #include "st_cb_fbo.h"
 #include "st_cb_texture.h"
diff --git a/src/mesa/state_tracker/st_cb_feedback.c b/src/mesa/state_tracker/st_cb_feedback.c
index 19021411cf..c7e8aa7cc5 100644
--- a/src/mesa/state_tracker/st_cb_feedback.c
+++ b/src/mesa/state_tracker/st_cb_feedback.c
@@ -52,7 +52,6 @@
 
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
 #include "cso_cache/cso_cache.h"
 
 #include "draw/draw_context.h"
diff --git a/src/mesa/state_tracker/st_cb_flush.c b/src/mesa/state_tracker/st_cb_flush.c
index 072f2e92ad..f8621ab125 100644
--- a/src/mesa/state_tracker/st_cb_flush.c
+++ b/src/mesa/state_tracker/st_cb_flush.c
@@ -42,7 +42,7 @@
 #include "st_public.h"
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/p_screen.h"
 #include "util/u_gen_mipmap.h"
 #include "util/u_blit.h"
 
@@ -55,7 +55,7 @@ is_front_buffer_dirty(struct st_context *st)
 
 
 /**
- * Tell the winsys to display the front color buffer on-screen.
+ * Tell the screen to display the front color buffer on-screen.
  */
 static void
 display_front_buffer(struct st_context *st)
@@ -67,7 +67,7 @@ display_front_buffer(struct st_context *st)
 
    /* Hook for copying "fake" frontbuffer if necessary:
     */
-   st->pipe->winsys->flush_frontbuffer( st->pipe->winsys, front_surf,
+   st->pipe->screen->flush_frontbuffer( st->pipe->screen, front_surf,
                                         st->pipe->priv );
 
    /*
@@ -103,8 +103,8 @@ void st_finish( struct st_context *st )
    st_flush(st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);
 
    if(fence) {
-      st->pipe->winsys->fence_finish(st->pipe->winsys, fence, 0);
-      st->pipe->winsys->fence_reference(st->pipe->winsys, &fence, NULL);
+      st->pipe->screen->fence_finish(st->pipe->screen, fence, 0);
+      st->pipe->screen->fence_reference(st->pipe->screen, &fence, NULL);
    }
 }
 
diff --git a/src/mesa/state_tracker/st_cb_strings.c b/src/mesa/state_tracker/st_cb_strings.c
index 09545aa8fb..2036ccafbf 100644
--- a/src/mesa/state_tracker/st_cb_strings.c
+++ b/src/mesa/state_tracker/st_cb_strings.c
@@ -36,7 +36,6 @@
 #include "main/version.h"
 #include "pipe/p_context.h"
 #include "pipe/p_screen.h"
-#include "pipe/p_winsys.h"
 #include "st_context.h"
 #include "st_cb_strings.h"
 
@@ -67,10 +66,9 @@ st_get_string(GLcontext * ctx, GLenum name)
    }
 
    case GL_RENDERER:
-      util_snprintf(st->renderer, sizeof(st->renderer), "Gallium %s, %s on %s", 
+      util_snprintf(st->renderer, sizeof(st->renderer), "Gallium %s on %s", 
                ST_VERSION_STRING,
-	       screen->get_name( screen ),
-	       screen->winsys->get_name( screen->winsys ));
+	       screen->get_name( screen ));
 
       return (GLubyte *) st->renderer;
 
diff --git a/src/mesa/state_tracker/wgl/stw_device.c b/src/mesa/state_tracker/wgl/stw_device.c
index 129b24ce77..4c2fb5c61b 100644
--- a/src/mesa/state_tracker/wgl/stw_device.c
+++ b/src/mesa/state_tracker/wgl/stw_device.c
@@ -28,7 +28,6 @@
 #include <windows.h>
 
 #include "pipe/p_debug.h"
-#include "pipe/p_winsys.h"
 #include "pipe/p_screen.h"
 
 #include "stw_device.h"
@@ -40,19 +39,18 @@ struct stw_device *stw_dev = NULL;
 
 
 /**
- * XXX: Dispatch pipe_winsys::flush_front_buffer to our 
+ * XXX: Dispatch pipe_screen::flush_front_buffer to our 
  * stw_winsys::flush_front_buffer.
  */
 static void 
-st_flush_frontbuffer(struct pipe_winsys *ws,
+st_flush_frontbuffer(struct pipe_screen *screen,
                      struct pipe_surface *surf,
                      void *context_private )
 {
    const struct stw_winsys *stw_winsys = stw_dev->stw_winsys;
-   struct pipe_winsys *winsys = stw_dev->screen->winsys;
    HDC hdc = (HDC)context_private;
    
-   stw_winsys->flush_frontbuffer(winsys, surf, hdc);
+   stw_winsys->flush_frontbuffer(screen, surf, hdc);
 }
 
 
@@ -72,8 +70,7 @@ st_init(const struct stw_winsys *stw_winsys)
    if(!stw_dev->screen)
       goto error1;
 
-   /* XXX: pipe_winsys::flush_frontbuffer should go away */
-   stw_dev->screen->winsys->flush_frontbuffer = st_flush_frontbuffer;
+   stw_dev->screen->flush_frontbuffer = st_flush_frontbuffer;
    
    pixelformat_init();
 
diff --git a/src/mesa/state_tracker/wgl/stw_wgl_swapbuffers.c b/src/mesa/state_tracker/wgl/stw_wgl_swapbuffers.c
index 002bcc64e7..41bfeadfb1 100644
--- a/src/mesa/state_tracker/wgl/stw_wgl_swapbuffers.c
+++ b/src/mesa/state_tracker/wgl/stw_wgl_swapbuffers.c
@@ -27,7 +27,6 @@
 
 #include <windows.h>
 
-#include "pipe/p_winsys.h"
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
 #include "state_tracker/st_context.h"
@@ -55,7 +54,7 @@ wglSwapBuffers(
 
    st_get_framebuffer_surface( fb->stfb, ST_SURFACE_BACK_LEFT, &surf );
 
-   stw_dev->stw_winsys->flush_frontbuffer(stw_dev->screen->winsys,
+   stw_dev->stw_winsys->flush_frontbuffer(stw_dev->screen,
                                           surf,
                                           hdc );
 
diff --git a/src/mesa/state_tracker/wgl/stw_winsys.h b/src/mesa/state_tracker/wgl/stw_winsys.h
index 8557327ccd..a85a9a2257 100644
--- a/src/mesa/state_tracker/wgl/stw_winsys.h
+++ b/src/mesa/state_tracker/wgl/stw_winsys.h
@@ -34,7 +34,6 @@
 
 struct pipe_screen;
 struct pipe_context;
-struct pipe_winsys;
 struct pipe_surface;
 
 struct stw_winsys
@@ -46,7 +45,7 @@ struct stw_winsys
    (*create_context)( struct pipe_screen *screen );
 
    void
-   (*flush_frontbuffer)( struct pipe_winsys *winsys,
+   (*flush_frontbuffer)( struct pipe_screen *screen,
                          struct pipe_surface *surf,
                          HDC hDC );
 };