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-rw-r--r--src/gallium/include/state_tracker/dri1_api.h10
-rw-r--r--src/gallium/include/state_tracker/drisw_api.h23
-rw-r--r--src/gallium/include/state_tracker/drm_api.h59
-rw-r--r--src/gallium/include/state_tracker/graw.h36
-rw-r--r--src/gallium/include/state_tracker/st_api.h407
-rw-r--r--src/gallium/include/state_tracker/sw_winsys.h145
-rw-r--r--src/gallium/include/state_tracker/xlib_sw_winsys.h29
7 files changed, 675 insertions, 34 deletions
diff --git a/src/gallium/include/state_tracker/dri1_api.h b/src/gallium/include/state_tracker/dri1_api.h
index b173ba3683..a48c5de5a0 100644
--- a/src/gallium/include/state_tracker/dri1_api.h
+++ b/src/gallium/include/state_tracker/dri1_api.h
@@ -7,13 +7,13 @@
#include "state_tracker/drm_api.h"
-#include <drm.h>
-
struct pipe_screen;
struct pipe_winsys;
struct pipe_buffer;
struct pipe_context;
-struct pipe_texture;
+struct pipe_resource;
+
+struct drm_clip_rect;
struct dri1_api_version
{
@@ -31,8 +31,8 @@ struct dri1_api_lock_funcs
{
void (*lock) (struct pipe_context * pipe);
void (*unlock) (struct pipe_context * locked_pipe);
- boolean(*is_locked) (struct pipe_context * locked_pipe);
- boolean(*is_lock_lost) (struct pipe_context * locked_pipe);
+ boolean(*is_locked) (struct pipe_context * locked_pipe);
+ boolean(*is_lock_lost) (struct pipe_context * locked_pipe);
void (*clear_lost_lock) (struct pipe_context * locked_pipe);
};
diff --git a/src/gallium/include/state_tracker/drisw_api.h b/src/gallium/include/state_tracker/drisw_api.h
new file mode 100644
index 0000000000..944a649257
--- /dev/null
+++ b/src/gallium/include/state_tracker/drisw_api.h
@@ -0,0 +1,23 @@
+#ifndef _DRISW_API_H_
+#define _DRISW_API_H_
+
+#include "pipe/p_compiler.h"
+
+struct pipe_screen;
+struct dri_drawable;
+
+/**
+ * This callback struct is intended for the winsys to call the loader.
+ */
+struct drisw_loader_funcs
+{
+ void (*put_image) (struct dri_drawable *dri_drawable,
+ void *data, unsigned width, unsigned height);
+};
+
+/**
+ * Implemented by the drisw target.
+ */
+struct pipe_screen * drisw_create_screen(struct drisw_loader_funcs *lf);
+
+#endif
diff --git a/src/gallium/include/state_tracker/drm_api.h b/src/gallium/include/state_tracker/drm_api.h
index e9fa9b4d2a..3d8fdd86fc 100644
--- a/src/gallium/include/state_tracker/drm_api.h
+++ b/src/gallium/include/state_tracker/drm_api.h
@@ -8,7 +8,7 @@ struct pipe_screen;
struct pipe_winsys;
struct pipe_buffer;
struct pipe_context;
-struct pipe_texture;
+struct pipe_resource;
enum drm_create_screen_mode {
DRM_CREATE_NORMAL = 0,
@@ -17,6 +17,32 @@ enum drm_create_screen_mode {
DRM_CREATE_MAX
};
+#define DRM_API_HANDLE_TYPE_SHARED 0
+#define DRM_API_HANDLE_TYPE_KMS 1
+
+/**
+ * For use with pipe_screen::{texture_from_handle|texture_get_handle}.
+ */
+struct winsys_handle
+{
+ /**
+ * Unused for texture_from_handle, always
+ * DRM_API_HANDLE_TYPE_SHARED. Input to texture_get_handle,
+ * use TEXTURE_USAGE to select handle for kms or ipc.
+ */
+ unsigned type;
+ /**
+ * Input to texture_from_handle.
+ * Output for texture_get_handle.
+ */
+ unsigned handle;
+ /**
+ * Input to texture_from_handle.
+ * Output for texture_get_handle.
+ */
+ unsigned stride;
+};
+
/**
* Modes other than DRM_CREATE_NORMAL derive from this struct.
*/
@@ -28,6 +54,8 @@ struct drm_create_screen_arg {
struct drm_api
{
+ void (*destroy)(struct drm_api *api);
+
const char *name;
/**
@@ -36,37 +64,10 @@ struct drm_api
const char *driver_name;
/**
- * Special buffer functions
+ * Create a pipe srcreen.
*/
- /*@{*/
struct pipe_screen* (*create_screen)(struct drm_api *api, int drm_fd,
struct drm_create_screen_arg *arg);
- /*@}*/
-
- /**
- * Special buffer functions
- */
- /*@{*/
- struct pipe_texture*
- (*texture_from_shared_handle)(struct drm_api *api,
- struct pipe_screen *screen,
- struct pipe_texture *templ,
- const char *name,
- unsigned stride,
- unsigned handle);
- boolean (*shared_handle_from_texture)(struct drm_api *api,
- struct pipe_screen *screen,
- struct pipe_texture *texture,
- unsigned *stride,
- unsigned *handle);
- boolean (*local_handle_from_texture)(struct drm_api *api,
- struct pipe_screen *screen,
- struct pipe_texture *texture,
- unsigned *stride,
- unsigned *handle);
- /*@}*/
-
- void (*destroy)(struct drm_api *api);
};
extern struct drm_api * drm_api_create(void);
diff --git a/src/gallium/include/state_tracker/graw.h b/src/gallium/include/state_tracker/graw.h
new file mode 100644
index 0000000000..a58e18e473
--- /dev/null
+++ b/src/gallium/include/state_tracker/graw.h
@@ -0,0 +1,36 @@
+#ifndef GALLIUM_RAW_H
+#define GALLIUM_RAW_H
+
+/* This is an API for exercising gallium functionality in a
+ * platform-neutral fashion. Whatever platform integration is
+ * necessary to implement this interface is orchestrated by the
+ * individual target building this entity.
+ *
+ * For instance, the graw-xlib target includes code to implent these
+ * interfaces on top of the X window system.
+ *
+ * Programs using this interface may additionally benefit from some of
+ * the utilities currently in the libgallium.a library, especially
+ * those for parsing text representations of TGSI shaders.
+ */
+
+#include "pipe/p_format.h"
+
+struct pipe_screen;
+
+struct pipe_screen *graw_init( void );
+
+/* Returns a handle to be used with flush_frontbuffer()/present().
+ *
+ * Query format support with screen::is_format_supported and usage
+ * XXX.
+ */
+void *graw_create_window( int x,
+ int y,
+ unsigned width,
+ unsigned height,
+ enum pipe_format format );
+
+void graw_destroy_window( void *handle );
+
+#endif
diff --git a/src/gallium/include/state_tracker/st_api.h b/src/gallium/include/state_tracker/st_api.h
new file mode 100644
index 0000000000..8897ff7c25
--- /dev/null
+++ b/src/gallium/include/state_tracker/st_api.h
@@ -0,0 +1,407 @@
+/**********************************************************
+ * Copyright 2010 VMware, Inc. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ **********************************************************/
+
+
+#ifndef _ST_API_H_
+#define _ST_API_H_
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_format.h"
+
+/**
+ * \file API for communication between state trackers and state tracker
+ * managers.
+ *
+ * While both are state tackers, we use the term state tracker for rendering
+ * APIs such as OpenGL or OpenVG, and state tracker manager for window system
+ * APIs such as EGL or GLX in this file.
+ *
+ * This file defines an API to be implemented by both state trackers and state
+ * tracker managers.
+ */
+
+/**
+ * The entry points of the state trackers.
+ */
+#define ST_MODULE_OPENGL_SYMBOL "st_module_OpenGL"
+#define ST_MODULE_OPENGL_ES1_SYMBOL "st_module_OpenGL_ES1"
+#define ST_MODULE_OPENGL_ES2_SYMBOL "st_module_OpenGL_ES2"
+#define ST_MODULE_OPENVG_SYMBOL "st_module_OpenVG"
+
+/**
+ * The supported rendering API of a state tracker.
+ */
+enum st_api_type {
+ ST_API_OPENGL,
+ ST_API_OPENGL_ES1,
+ ST_API_OPENGL_ES2,
+ ST_API_OPENVG,
+
+ ST_API_COUNT
+};
+
+/**
+ * Used in st_context_iface->teximage.
+ */
+enum st_texture_type {
+ ST_TEXTURE_1D,
+ ST_TEXTURE_2D,
+ ST_TEXTURE_3D,
+ ST_TEXTURE_RECT,
+};
+
+/**
+ * Available attachments of framebuffer.
+ */
+enum st_attachment_type {
+ ST_ATTACHMENT_FRONT_LEFT,
+ ST_ATTACHMENT_BACK_LEFT,
+ ST_ATTACHMENT_FRONT_RIGHT,
+ ST_ATTACHMENT_BACK_RIGHT,
+ ST_ATTACHMENT_DEPTH_STENCIL,
+ ST_ATTACHMENT_ACCUM,
+ ST_ATTACHMENT_SAMPLE,
+
+ ST_ATTACHMENT_COUNT,
+ ST_ATTACHMENT_INVALID = -1
+};
+
+/* for buffer_mask in st_visual */
+#define ST_ATTACHMENT_FRONT_LEFT_MASK (1 << ST_ATTACHMENT_FRONT_LEFT)
+#define ST_ATTACHMENT_BACK_LEFT_MASK (1 << ST_ATTACHMENT_BACK_LEFT)
+#define ST_ATTACHMENT_FRONT_RIGHT_MASK (1 << ST_ATTACHMENT_FRONT_RIGHT)
+#define ST_ATTACHMENT_BACK_RIGHT_MASK (1 << ST_ATTACHMENT_BACK_RIGHT)
+#define ST_ATTACHMENT_DEPTH_STENCIL_MASK (1 << ST_ATTACHMENT_DEPTH_STENCIL)
+#define ST_ATTACHMENT_ACCUM_MASK (1 << ST_ATTACHMENT_ACCUM)
+#define ST_ATTACHMENT_SAMPLE_MASK (1 << ST_ATTACHMENT_SAMPLE)
+
+/**
+ * Enumerations of state tracker context resources.
+ */
+enum st_context_resource_type {
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_2D,
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_3D,
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_CUBE_MAP_POSITIVE_X,
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_CUBE_MAP_NEGATIVE_X,
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_CUBE_MAP_POSITIVE_Y,
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_CUBE_MAP_POSITIVE_Z,
+ ST_CONTEXT_RESOURCE_OPENGL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
+ ST_CONTEXT_RESOURCE_OPENGL_RENDERBUFFER,
+ ST_CONTEXT_RESOURCE_OPENVG_PARENT_IMAGE,
+};
+
+/**
+ * The return type of st_api->get_proc_address.
+ */
+typedef void (*st_proc_t)(void);
+
+struct pipe_context;
+struct pipe_resource;
+struct pipe_fence_handle;
+
+/**
+ * Used in st_context_iface->get_resource_for_egl_image.
+ */
+struct st_context_resource
+{
+ /* these fields are filled by the caller */
+ enum st_context_resource_type type;
+ void *resource;
+
+ /* this is owned by the caller */
+ struct pipe_resource *texture;
+};
+
+/**
+ * Used in st_manager_iface->get_egl_image.
+ */
+struct st_egl_image
+{
+ /* these fields are filled by the caller */
+ struct st_context_iface *stctxi;
+ void *egl_image;
+
+ /* this is owned by the caller */
+ struct pipe_resource *texture;
+
+ unsigned face;
+ unsigned level;
+ unsigned zslice;
+};
+
+/**
+ * Represent the visual of a framebuffer.
+ */
+struct st_visual
+{
+ /**
+ * Available buffers. Tested with ST_FRAMEBUFFER_*_MASK.
+ */
+ unsigned buffer_mask;
+
+ /**
+ * Buffer formats. The formats are always set even when the buffer is
+ * not available.
+ */
+ enum pipe_format color_format;
+ enum pipe_format depth_stencil_format;
+ enum pipe_format accum_format;
+ int samples;
+
+ /**
+ * Desired render buffer.
+ */
+ enum st_attachment_type render_buffer;
+};
+
+/**
+ * Represent a windowing system drawable.
+ *
+ * The framebuffer is implemented by the state tracker manager and
+ * used by the state trackers.
+ *
+ * Instead of the winsys pokeing into the API context to figure
+ * out what buffers that might be needed in the future by the API
+ * context, it calls into the framebuffer to get the textures.
+ *
+ * This structure along with the notify_invalid_framebuffer
+ * allows framebuffers to be shared between different threads
+ * but at the same make the API context free from thread
+ * syncronisation primitves, with the exception of a small
+ * atomic flag used for notification of framebuffer dirty status.
+ *
+ * The thread syncronisation is put inside the framebuffer
+ * and only called once the framebuffer has become dirty.
+ */
+struct st_framebuffer_iface
+{
+ /**
+ * Available for the state tracker manager to use.
+ */
+ void *st_manager_private;
+
+ /**
+ * The visual of a framebuffer.
+ */
+ const struct st_visual *visual;
+
+ /**
+ * Flush the front buffer.
+ *
+ * On some window systems, changes to the front buffers are not immediately
+ * visible. They need to be flushed.
+ *
+ * @att is one of the front buffer attachments.
+ */
+ boolean (*flush_front)(struct st_framebuffer_iface *stfbi,
+ enum st_attachment_type statt);
+
+ /**
+ * The state tracker asks for the textures it needs.
+ *
+ * It should try to only ask for attachments that it currently renders
+ * to, thus allowing the winsys to delay the allocation of textures not
+ * needed. For example front buffer attachments are not needed if you
+ * only do back buffer rendering.
+ *
+ * The implementor of this function needs to also ensure
+ * thread safty as this call might be done from multiple threads.
+ *
+ * The returned textures are owned by the caller. They should be
+ * unreferenced when no longer used. If this function is called multiple
+ * times with different sets of attachments, those buffers not included in
+ * the last call might be destroyed. This behavior might change in the
+ * future.
+ */
+ boolean (*validate)(struct st_framebuffer_iface *stfbi,
+ const enum st_attachment_type *statts,
+ unsigned count,
+ struct pipe_resource **out);
+};
+
+/**
+ * Represent a rendering context.
+ *
+ * This entity is created from st_api and used by the state tracker manager.
+ */
+struct st_context_iface
+{
+ /**
+ * Available for the state tracker and the manager to use.
+ */
+ void *st_context_private;
+ void *st_manager_private;
+
+ /**
+ * Destroy the context.
+ */
+ void (*destroy)(struct st_context_iface *stctxi);
+
+ /**
+ * Invalidate the current textures that was taken from a framebuffer.
+ *
+ * The state tracker manager calls this function to let the rendering
+ * context know that it should update the textures it got from
+ * st_framebuffer_iface::validate. It should do so at the latest time possible.
+ * Possible right before sending triangles to the pipe context.
+ *
+ * For certain platforms this function might be called from a thread other
+ * than the thread that the context is currently bound in, and must
+ * therefore be thread safe. But it is the state tracker manager's
+ * responsibility to make sure that the framebuffer is bound to the context
+ * and the API context is current for the duration of this call.
+ *
+ * Thus reducing the sync primitive needed to a single atomic flag.
+ */
+ void (*notify_invalid_framebuffer)(struct st_context_iface *stctxi,
+ struct st_framebuffer_iface *stfbi);
+
+ /**
+ * Flush all drawing from context to the pipe also flushes the pipe.
+ */
+ void (*flush)(struct st_context_iface *stctxi, unsigned flags,
+ struct pipe_fence_handle **fence);
+
+ /**
+ * Replace the texture image of a texture object at the specified level.
+ *
+ * This function is optional.
+ */
+ boolean (*teximage)(struct st_context_iface *stctxi, enum st_texture_type target,
+ int level, enum pipe_format internal_format,
+ struct pipe_resource *tex, boolean mipmap);
+
+ /**
+ * Used to implement glXCopyContext.
+ */
+ void (*copy)(struct st_context_iface *stctxi,
+ struct st_context_iface *stsrci, unsigned mask);
+
+ /**
+ * Look up and return the info of a resource for EGLImage.
+ *
+ * This function is optional.
+ */
+ boolean (*get_resource_for_egl_image)(struct st_context_iface *stctxi,
+ struct st_context_resource *stres);
+};
+
+
+/**
+ * Represent a state tracker manager.
+ *
+ * This interface is implemented by the state tracker manager. It corresponds
+ * to a "display" in the window system.
+ */
+struct st_manager
+{
+ struct pipe_screen *screen;
+
+ /**
+ * Look up and return the info of an EGLImage.
+ *
+ * This function is optional.
+ */
+ boolean (*get_egl_image)(struct st_manager *smapi,
+ struct st_egl_image *stimg);
+};
+
+/**
+ * Represent a rendering API such as OpenGL or OpenVG.
+ *
+ * Implemented by the state tracker and used by the state tracker manager.
+ */
+struct st_api
+{
+ /**
+ * Destroy the API.
+ */
+ void (*destroy)(struct st_api *stapi);
+
+ /**
+ * Return an API entry point.
+ *
+ * For GL this is the same as _glapi_get_proc_address.
+ */
+ st_proc_t (*get_proc_address)(struct st_api *stapi, const char *procname);
+
+ /**
+ * Return true if the visual is supported by the state tracker.
+ */
+ boolean (*is_visual_supported)(struct st_api *stapi,
+ const struct st_visual *visual);
+
+ /**
+ * Create a rendering context.
+ */
+ struct st_context_iface *(*create_context)(struct st_api *stapi,
+ struct st_manager *smapi,
+ const struct st_visual *visual,
+ struct st_context_iface *stsharei);
+
+ /**
+ * Bind the context to the calling thread with draw and read as drawables.
+ *
+ * The framebuffers might have different visuals than the context does.
+ */
+ boolean (*make_current)(struct st_api *stapi,
+ struct st_context_iface *stctxi,
+ struct st_framebuffer_iface *stdrawi,
+ struct st_framebuffer_iface *streadi);
+
+ /**
+ * Get the currently bound context in the calling thread.
+ */
+ struct st_context_iface *(*get_current)(struct st_api *stapi);
+};
+
+/**
+ * Represent a state tracker.
+ *
+ * This is the entry point of a state tracker.
+ */
+struct st_module
+{
+ enum st_api_type api;
+ struct st_api *(*create_api)(void);
+};
+
+/**
+ * Return true if the visual has the specified buffers.
+ */
+static INLINE boolean
+st_visual_have_buffers(const struct st_visual *visual, unsigned mask)
+{
+ return ((visual->buffer_mask & mask) == mask);
+}
+
+/* these symbols may need to be dynamically lookup up */
+extern PUBLIC const struct st_module st_module_OpenGL;
+extern PUBLIC const struct st_module st_module_OpenGL_ES1;
+extern PUBLIC const struct st_module st_module_OpenGL_ES2;
+extern PUBLIC const struct st_module st_module_OpenVG;
+
+#endif /* _ST_API_H_ */
diff --git a/src/gallium/include/state_tracker/sw_winsys.h b/src/gallium/include/state_tracker/sw_winsys.h
new file mode 100644
index 0000000000..d461dedb90
--- /dev/null
+++ b/src/gallium/include/state_tracker/sw_winsys.h
@@ -0,0 +1,145 @@
+/**************************************************************************
+ *
+ * Copyright 2007-2009 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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Software rasterizer winsys.
+ */
+
+
+#ifndef SW_WINSYS_H
+#define SW_WINSYS_H
+
+
+#include "pipe/p_compiler.h" /* for boolean */
+#include "pipe/p_format.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+struct winsys_handle;
+struct pipe_screen;
+struct pipe_context;
+struct pipe_resource;
+
+
+/**
+ * Opaque pointer.
+ */
+struct sw_displaytarget;
+
+
+/**
+ * This is the interface that sw expects any window system
+ * hosting it to implement.
+ *
+ * sw is for the most part a self sufficient driver. The only thing it
+ * does not know is how to display a surface.
+ */
+struct sw_winsys
+{
+ void
+ (*destroy)( struct sw_winsys *ws );
+
+ boolean
+ (*is_displaytarget_format_supported)( struct sw_winsys *ws,
+ unsigned tex_usage,
+ enum pipe_format format );
+
+ /**
+ * Allocate storage for a render target.
+ *
+ * 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_screen when creating a texture marked
+ * with the PIPE_BIND_DISPLAY_TARGET flag to get the underlying
+ * storage.
+ */
+ struct sw_displaytarget *
+ (*displaytarget_create)( struct sw_winsys *ws,
+ unsigned tex_usage,
+ enum pipe_format format,
+ unsigned width, unsigned height,
+ unsigned alignment,
+ unsigned *stride );
+
+ /**
+ * Used to implement texture_from_handle.
+ */
+ struct sw_displaytarget *
+ (*displaytarget_from_handle)( struct sw_winsys *ws,
+ const struct pipe_resource *template,
+ struct winsys_handle *whandle,
+ unsigned *stride );
+
+ /**
+ * Used to implement texture_get_handle.
+ */
+ boolean
+ (*displaytarget_get_handle)( struct sw_winsys *ws,
+ struct sw_displaytarget *dt,
+ struct winsys_handle *whandle );
+
+ /**
+ * \param flags bitmask of PIPE_TRANSFER_x flags
+ */
+ void *
+ (*displaytarget_map)( struct sw_winsys *ws,
+ struct sw_displaytarget *dt,
+ unsigned flags );
+
+ void
+ (*displaytarget_unmap)( struct sw_winsys *ws,
+ struct sw_displaytarget *dt );
+
+ /**
+ * @sa pipe_screen:flush_frontbuffer.
+ *
+ * This call will likely become asynchronous eventually.
+ */
+ void
+ (*displaytarget_display)( struct sw_winsys *ws,
+ struct sw_displaytarget *dt,
+ void *context_private );
+
+ void
+ (*displaytarget_destroy)( struct sw_winsys *ws,
+ struct sw_displaytarget *dt );
+};
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SW_WINSYS_H */
diff --git a/src/gallium/include/state_tracker/xlib_sw_winsys.h b/src/gallium/include/state_tracker/xlib_sw_winsys.h
new file mode 100644
index 0000000000..f22c22bb62
--- /dev/null
+++ b/src/gallium/include/state_tracker/xlib_sw_winsys.h
@@ -0,0 +1,29 @@
+#ifndef XLIB_SW_WINSYS_H
+#define XLIB_SW_WINSYS_H
+
+#include "state_tracker/sw_winsys.h"
+#include <X11/Xlib.h>
+
+
+struct pipe_screen;
+struct pipe_surface;
+
+/* This is what the xlib software winsys expects to find in the
+ * "private" field of flush_frontbuffers().
+ *
+ * Xlib-based state trackers somehow need to know this.
+ */
+struct xlib_drawable {
+ Visual *visual;
+ int depth;
+ Drawable drawable;
+};
+
+
+/* This is the public interface to the ws/xlib module. Why isn't it
+ * being defined in that directory?
+ */
+struct sw_winsys *xlib_create_sw_winsys( Display *display );
+
+
+#endif