gallium: introduce target directory

Currently there are still at least two functions bundled up inside the
winsys concept:

a) that of a backend resource manager, sometimes capable of performing
   present() operations,

b) the initialization code/routine for the whole driver stack.

The inclusion of (b) makes it difficult to share implementations of
(a) between different drivers.  For instance, a clean xlib winsys
could be of use for software-rasterized VG, GLES, EGL, etc, stacks.
But that is only true as long as there is no dependency from the
winsys to higher level code, as would be the case when we include (b)
in this component.

This change creates a new gallium/targets subtree, specifically for
implementing the glue needed to build individual driver stacks, and
moves that code out of a single example winsys, namely xlib.

Other drivers continue to build unchanged, but hopefully can migrate
to this structure over time.

6 files changed, 34 insertions, 492 deletions

diff --git a/src/gallium/winsys/xlib/Makefile b/src/gallium/winsys/xlib/Makefile
index 129300423a6..056b6a308fd 100644
--- a/src/gallium/winsys/xlib/Makefile
+++ b/src/gallium/winsys/xlib/Makefile
@@ -1,101 +1,19 @@
-# src/gallium/winsys/xlib/Makefile
-
-# This makefile produces a "stand-alone" libGL.so which is based on
-# Xlib (no DRI HW acceleration)
-
-
 TOP = ../../../..
 include $(TOP)/configs/current
 
+LIBNAME = ws_xlib
 
-GL_MAJOR = 1
-GL_MINOR = 5
-GL_TINY = 0$(MESA_MAJOR)0$(MESA_MINOR)0$(MESA_TINY)
-
-
-INCLUDE_DIRS = \
-	-I$(TOP)/include \
-	-I$(TOP)/src/mesa \
-	-I$(TOP)/src/mesa/main \
+LIBRARY_INCLUDES = \
 	-I$(TOP)/src/gallium/include \
 	-I$(TOP)/src/gallium/drivers \
-	-I$(TOP)/src/gallium/state_trackers/glx/xlib \
 	-I$(TOP)/src/gallium/auxiliary
 
-DEFINES += \
-	-DGALLIUM_SOFTPIPE
-#-DGALLIUM_CELL will be defined by the config */
-
-XLIB_WINSYS_SOURCES = \
-	xlib.c \
+C_SOURCES = \
 	xlib_cell.c \
 	xlib_sw_winsys.c \
 	xlib_llvmpipe.c \
 	xlib_softpipe.c
 
-
-XLIB_WINSYS_OBJECTS = $(XLIB_WINSYS_SOURCES:.c=.o)
-
-
-# Note: CELL_SPU_LIB is only defined for cell configs
-
-LIBS = \
-	$(GALLIUM_DRIVERS) \
-	$(TOP)/src/gallium/state_trackers/glx/xlib/libxlib.a \
-	$(TOP)/src/mesa/libglapi.a \
-	$(TOP)/src/mesa/libmesagallium.a \
-	$(GALLIUM_AUXILIARIES) \
-	$(CELL_SPU_LIB) \
-
-
-.SUFFIXES : .cpp
-
-.c.o:
-	$(CC) -c $(INCLUDE_DIRS) $(CFLAGS) $< -o $@
-
-.cpp.o:
-	$(CXX) -c $(INCLUDE_DIRS) $(CXXFLAGS) $< -o $@
-
-
-
-default: $(TOP)/$(LIB_DIR)/gallium $(TOP)/$(LIB_DIR)/gallium/$(GL_LIB_NAME)
-
-$(TOP)/$(LIB_DIR)/gallium:
-	@ mkdir -p $(TOP)/$(LIB_DIR)/gallium
-
-# Make the libGL.so library
-$(TOP)/$(LIB_DIR)/gallium/$(GL_LIB_NAME): $(XLIB_WINSYS_OBJECTS) $(LIBS) Makefile
-	$(TOP)/bin/mklib -o $(GL_LIB) \
-		-linker "$(CC)" \
-		-major $(GL_MAJOR) -minor $(GL_MINOR) -patch $(GL_TINY) \
-		-install $(TOP)/$(LIB_DIR)/gallium \
-		$(MKLIB_OPTIONS) $(XLIB_WINSYS_OBJECTS) \
-		-Wl,--start-group $(LIBS) -Wl,--end-group $(GL_LIB_DEPS)
-
-
-depend: $(XLIB_WINSYS_SOURCES)
-	@ echo "running $(MKDEP)"
-	@ rm -f depend  # workaround oops on gutsy?!?
-	@ touch depend
-	$(MKDEP) $(MKDEP_OPTIONS) $(DEFINES) $(INCLUDE_DIRS) $(XLIB_WINSYS_SOURCES) \
-		> /dev/null 2>/dev/null
-
-
-install: default
-	$(INSTALL) -d $(DESTDIR)$(INSTALL_DIR)/include/GL
-	$(INSTALL) -d $(DESTDIR)$(INSTALL_DIR)/$(LIB_DIR)
-	$(INSTALL) -m 644 $(TOP)/include/GL/*.h $(DESTDIR)$(INSTALL_DIR)/include/GL
-	@if [ -e $(TOP)/$(LIB_DIR)/$(GL_LIB_NAME) ]; then \
-		$(MINSTALL) $(TOP)/$(LIB_DIR)/libGL* $(DESTDIR)$(INSTALL_DIR)/$(LIB_DIR); \
-	fi
-
-
-# Emacs tags
-tags:
-	etags `find . -name \*.[ch]` $(TOP)/include/GL/*.h
-
-clean:
-	-rm -f *.o
+include ../../Makefile.template
 
 
-include depend
diff --git a/src/gallium/winsys/xlib/SConscript b/src/gallium/winsys/xlib/SConscript
index 92e508ee50c..26a13e42b5c 100644
--- a/src/gallium/winsys/xlib/SConscript
+++ b/src/gallium/winsys/xlib/SConscript
@@ -1,64 +1,29 @@
 #######################################################################
 # SConscript for xlib winsys
 
-Import('*')
-
-if env['platform'] != 'linux':
-    Return()
-
-if 'mesa' not in env['statetrackers']:
-    print 'warning: Mesa state tracker disabled: skipping build of xlib libGL.so'
-    Return()
-
-if env['dri']:
-    print 'warning: DRI enabled: skipping build of xlib libGL.so'
-    Return()
-
-if not set(('softpipe', 'llvmpipe', 'cell')).intersection(env['drivers']):
-    print 'warning: no supported pipe driver: skipping build of xlib libGL.so'
-    Return()
-
-env = env.Clone()
 
-env.Append(CPPPATH = [
-    '#/src/mesa',
-    '#/src/mesa/main',
-    '#src/gallium/state_trackers/glx/xlib',
-])
-
-env.Append(CPPDEFINES = ['USE_XSHM'])
-
-sources = [
-    'xlib.c',
-]
-
-drivers = [trace]
-    
-if 'softpipe' in env['drivers']:
-    env.Append(CPPDEFINES = 'GALLIUM_SOFTPIPE')
-    sources += ['xlib_softpipe.c', 'xlib_sw_winsys.c']
-    drivers += [softpipe]
-
-if 'llvmpipe' in env['drivers']:
-    env.Tool('llvm')
-    if 'LLVM_VERSION' in env:
-        env.Append(CPPDEFINES = 'GALLIUM_LLVMPIPE')
-        env.Tool('udis86')
-        sources += ['xlib_llvmpipe.c', 'xlib_sw_winsys.c']
-        drivers += [llvmpipe]
-    
-if 'cell' in env['drivers']:
-    env.Append(CPPDEFINES = 'GALLIUM_CELL')
-    sources += ['xlib_cell.c']
-    drivers += [cell]
-
-# TODO: write a wrapper function http://www.scons.org/wiki/WrapperFunctions
-libgl = env.SharedLibrary(
-    target ='GL',
-    source = sources,
-    LIBS = st_xlib + glapi + mesa + glsl + drivers + gallium + env['LIBS'],
-)
+Import('*')
 
-if not env['dri']:
-    # Only install this libGL.so if DRI not enabled
-    env.InstallSharedLibrary(libgl, version=(1, 5))
+if env['platform'] == 'linux' \
+        and 'mesa' in env['statetrackers']:
+
+    env = env.Clone()
+
+    env.Append(CPPPATH = [
+        '#/src/gallium/include',
+        '#/src/gallium/auxiliary',
+        '#/src/gallium/drivers',
+    ])
+
+    env.Append(CPPDEFINES = ['USE_XSHM'])
+
+    st_xlib = env.ConvenienceLibrary(
+	target = 'ws_xlib',
+	source = [
+               'xlib_cell.c',
+               'xlib_llvmpipe.c',
+               'xlib_softpipe.c',
+               'xlib_sw_winsys.c',
+		]
+    )
+    Export('ws_xlib')
diff --git a/src/gallium/winsys/xlib/xlib.c b/src/gallium/winsys/xlib/xlib.c
deleted file mode 100644
index 9b91c980d15..00000000000
--- a/src/gallium/winsys/xlib/xlib.c
+++ /dev/null
@@ -1,136 +0,0 @@
-/**************************************************************************
- * 
- * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
- * 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 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
- * THE COPYRIGHT HOLDERS, AUTHORS 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.
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- * 
- * 
- **************************************************************************/
-
-/*
- * Authors:
- *   Keith Whitwell
- */
-
-#include "xlib.h"
-#include "xm_winsys.h"
-#include "util/u_debug.h"
-
-/* Todo, replace all this with callback-structs provided by the
- * individual implementations.
- */
-
-enum mode {
-   MODE_CELL,
-   MODE_LLVMPIPE,
-   MODE_SOFTPIPE
-};
-
-/* advertise OpenGL support */
-PUBLIC const int st_api_OpenGL = 1;
-
-static enum mode get_mode()
-{
-#ifdef GALLIUM_CELL
-   if (!getenv("GALLIUM_NOCELL")) 
-      return MODE_CELL;
-#endif
-
-#if defined(GALLIUM_LLVMPIPE)
-   return MODE_LLVMPIPE;
-#else
-   return MODE_SOFTPIPE;
-#endif
-}
-
-static void _init( void ) __attribute__((constructor));
-
-static void _init( void )
-{
-   enum mode xlib_mode = get_mode();
-
-   switch (xlib_mode) {
-   case MODE_CELL:
-#if defined(GALLIUM_CELL)
-      xmesa_set_driver( &xlib_cell_driver );
-#endif
-      break;
-   case MODE_LLVMPIPE:
-#if defined(GALLIUM_LLVMPIPE)
-      xmesa_set_driver( &xlib_llvmpipe_driver );
-#endif
-      break;
-   case MODE_SOFTPIPE:
-#if defined(GALLIUM_SOFTPIPE)
-      xmesa_set_driver( &xlib_softpipe_driver );
-#endif
-      break;
-   default:
-      assert(0);
-      break;
-   }
-}
-
-
-/***********************************************************************
- *
- * Butt-ugly hack to convince the linker not to throw away public GL
- * symbols (they are all referenced from getprocaddress, I guess).
- */
-extern void (*linker_foo(const unsigned char *procName))();
-extern void (*glXGetProcAddress(const unsigned char *procName))();
-
-extern void (*linker_foo(const unsigned char *procName))()
-{
-   return glXGetProcAddress(procName);
-}
-
-
-/**
- * When GLX_INDIRECT_RENDERING is defined, some symbols are missing in
- * libglapi.a.  We need to define them here.
- */
-#ifdef GLX_INDIRECT_RENDERING
-
-#define GL_GLEXT_PROTOTYPES
-#include "GL/gl.h"
-#include "glapi/glapi.h"
-#include "glapi/glapitable.h"
-#include "glapi/glapidispatch.h"
-
-#if defined(USE_MGL_NAMESPACE)
-#define NAME(func)  mgl##func
-#else
-#define NAME(func)  gl##func
-#endif
-
-#define DISPATCH(FUNC, ARGS, MESSAGE)		\
-   CALL_ ## FUNC(GET_DISPATCH(), ARGS);
-
-#define RETURN_DISPATCH(FUNC, ARGS, MESSAGE) 	\
-   return CALL_ ## FUNC(GET_DISPATCH(), ARGS);
-
-/* skip normal ones */
-#define _GLAPI_SKIP_NORMAL_ENTRY_POINTS
-#include "glapi/glapitemp.h"
-
-#endif /* GLX_INDIRECT_RENDERING */
diff --git a/src/gallium/winsys/xlib/xlib.h b/src/gallium/winsys/xlib/xlib.h
index 8e091d0c084..3c200486168 100644
--- a/src/gallium/winsys/xlib/xlib.h
+++ b/src/gallium/winsys/xlib/xlib.h
@@ -3,11 +3,16 @@
 #define XLIB_H
 
 #include "pipe/p_compiler.h"
-#include "xm_winsys.h"
+#include "state_tracker/xlib_sw_winsys.h"
 
 extern struct xm_driver xlib_softpipe_driver;
 extern struct xm_driver xlib_llvmpipe_driver;
 extern struct xm_driver xlib_cell_driver;
 
+struct sw_winsys *xlib_create_sw_winsys( Display *display );
+
+void xlib_sw_display(struct xlib_drawable *xm_buffer,
+                     struct sw_displaytarget *dt);
+
 
 #endif
diff --git a/src/gallium/winsys/xlib/xlib_brw_context.c b/src/gallium/winsys/xlib/xlib_brw_context.c
deleted file mode 100644
index 22bf41a46f7..00000000000
--- a/src/gallium/winsys/xlib/xlib_brw_context.c
+++ /dev/null
@@ -1,209 +0,0 @@
-/**************************************************************************
- * 
- * Copyright 2007 Tungsten Graphics, Inc., Bismarck, ND., USA
- * 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 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
- * THE COPYRIGHT HOLDERS, AUTHORS 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.
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- * 
- * 
- **************************************************************************/
-
-/*
- * Authors:
- *   Keith Whitwell
- *   Brian Paul
- */
-
-
-/* #include "glxheader.h" */
-/* #include "xmesaP.h" */
-
-#include "util/u_simple_screen.h"
-#include "util/u_inlines.h"
-#include "util/u_math.h"
-#include "util/u_memory.h"
-#include "i965simple/brw_winsys.h"
-#include "xlib_brw_aub.h"
-#include "xlib_brw.h"
-
-
-
-
-#define XBCWS_BATCHBUFFER_SIZE 1024
-
-
-/* The backend to the brw driver (ie struct brw_winsys) is actually a
- * per-context entity.
- */
-struct xlib_brw_context_winsys {
-   struct brw_winsys brw_context_winsys;   /**< batch buffer funcs */
-   struct aub_context *aub;
-                         
-   struct pipe_winsys *pipe_winsys;
-
-   unsigned batch_data[XBCWS_BATCHBUFFER_SIZE];
-   unsigned batch_nr;
-   unsigned batch_size;
-   unsigned batch_alloc;
-};
-
-
-/* Turn a brw_winsys into an xlib_brw_context_winsys:
- */
-static inline struct xlib_brw_context_winsys *
-xlib_brw_context_winsys( struct brw_winsys *sws )
-{
-   return (struct xlib_brw_context_winsys *)sws;
-}
-
-
-/* Simple batchbuffer interface:
- */
-
-static unsigned *xbcws_batch_start( struct brw_winsys *sws,
-					 unsigned dwords,
-					 unsigned relocs )
-{
-   struct xlib_brw_context_winsys *xbcws = xlib_brw_context_winsys(sws);
-
-   if (xbcws->batch_size < xbcws->batch_nr + dwords)
-      return NULL;
-
-   xbcws->batch_alloc = xbcws->batch_nr + dwords;
-   return (void *)1;			/* not a valid pointer! */
-}
-
-static void xbcws_batch_dword( struct brw_winsys *sws,
-				    unsigned dword )
-{
-   struct xlib_brw_context_winsys *xbcws = xlib_brw_context_winsys(sws);
-
-   assert(xbcws->batch_nr < xbcws->batch_alloc);
-   xbcws->batch_data[xbcws->batch_nr++] = dword;
-}
-
-static void xbcws_batch_reloc( struct brw_winsys *sws,
-			     struct pipe_buffer *buf,
-			     unsigned access_flags,
-			     unsigned delta )
-{
-   struct xlib_brw_context_winsys *xbcws = xlib_brw_context_winsys(sws);
-
-   assert(xbcws->batch_nr < xbcws->batch_alloc);
-   xbcws->batch_data[xbcws->batch_nr++] = 
-      ( xlib_brw_get_buffer_offset( NULL, buf, access_flags ) +
-        delta );
-}
-
-static void xbcws_batch_end( struct brw_winsys *sws )
-{
-   struct xlib_brw_context_winsys *xbcws = xlib_brw_context_winsys(sws);
-
-   assert(xbcws->batch_nr <= xbcws->batch_alloc);
-   xbcws->batch_alloc = 0;
-}
-
-static void xbcws_batch_flush( struct brw_winsys *sws,
-				    struct pipe_fence_handle **fence )
-{
-   struct xlib_brw_context_winsys *xbcws = xlib_brw_context_winsys(sws);
-   assert(xbcws->batch_nr <= xbcws->batch_size);
-
-   if (xbcws->batch_nr) {
-      xlib_brw_commands_aub( xbcws->pipe_winsys,
-                             xbcws->batch_data,
-                             xbcws->batch_nr );
-   }
-
-   xbcws->batch_nr = 0;
-}
-
-  
-
-/* Really a per-device function, just pass through:
- */
-static unsigned xbcws_get_buffer_offset( struct brw_winsys *sws,
-                                         struct pipe_buffer *buf,
-                                         unsigned access_flags )
-{
-   struct xlib_brw_context_winsys *xbcws = xlib_brw_context_winsys(sws);
-
-   return xlib_brw_get_buffer_offset( xbcws->pipe_winsys,
-                                      buf,
-                                      access_flags );
-}
-
-
-/* Really a per-device function, just pass through:
- */
-static void xbcws_buffer_subdata_typed( struct brw_winsys *sws,
-                                       struct pipe_buffer *buf,
-                                       unsigned long offset, 
-                                       unsigned long size, 
-                                       const void *data,
-                                       unsigned data_type )
-{
-   struct xlib_brw_context_winsys *xbcws = xlib_brw_context_winsys(sws);
-
-   xlib_brw_buffer_subdata_typed( xbcws->pipe_winsys,
-                                  buf,
-                                  offset,
-                                  size,
-                                  data,
-                                  data_type );
-}
-
-
-/**
- * Create i965 hardware rendering context, but plugged into a
- * dump-to-aubfile backend.
- */
-struct pipe_context *
-xlib_create_brw_context( struct pipe_screen *screen,
-                         void *unused )
-{
-   struct xlib_brw_context_winsys *xbcws = CALLOC_STRUCT( xlib_brw_context_winsys );
-   
-   /* Fill in this struct with callbacks that i965simple will need to
-    * communicate with the window system, buffer manager, etc. 
-    */
-   xbcws->brw_context_winsys.batch_start = xbcws_batch_start;
-   xbcws->brw_context_winsys.batch_dword = xbcws_batch_dword;
-   xbcws->brw_context_winsys.batch_reloc = xbcws_batch_reloc;
-   xbcws->brw_context_winsys.batch_end = xbcws_batch_end;
-   xbcws->brw_context_winsys.batch_flush = xbcws_batch_flush;
-   xbcws->brw_context_winsys.buffer_subdata_typed = xbcws_buffer_subdata_typed;
-   xbcws->brw_context_winsys.get_buffer_offset = xbcws_get_buffer_offset;
-
-   xbcws->pipe_winsys = screen->winsys; /* redundant */
-
-   xbcws->batch_size = XBCWS_BATCHBUFFER_SIZE;
-
-   /* Create the i965simple context:
-    */
-#ifdef GALLIUM_CELL
-   return NULL;
-#else
-   return brw_create( screen,
-		      &xbcws->brw_context_winsys,
-		      0 );
-#endif
-}
diff --git a/src/gallium/winsys/xlib/xlib_sw_winsys.c b/src/gallium/winsys/xlib/xlib_sw_winsys.c
index 21649a0b1f5..3e8fefb5824 100644
--- a/src/gallium/winsys/xlib/xlib_sw_winsys.c
+++ b/src/gallium/winsys/xlib/xlib_sw_winsys.c
@@ -34,7 +34,6 @@
 
 
 
-#include "xm_api.h"
 
 #undef ASSERT
 #undef Elements