gallium: Expose a opaque winsys handle and functions on pipe_screen

Instead of having these functions on a side interface like on
drm_api create a opaque winsys_handle that is to be passed down
into the winsys.

Currently the only thing ported to this new interface is drm_api,
and of that only the components that builds by default is ported.
All the drivers and any extra state trackers needs to be ported
before this can go into master.

11 files changed, 153 insertions, 174 deletions

diff --git a/src/gallium/drivers/identity/id_drm.c b/src/gallium/drivers/identity/id_drm.c
index f258c38cd7..936ccc444a 100644
--- a/src/gallium/drivers/identity/id_drm.c
+++ b/src/gallium/drivers/identity/id_drm.c
@@ -63,62 +63,6 @@ identity_drm_create_screen(struct drm_api *_api, int fd,
    return identity_screen_create(screen);
 }
 
-
-static struct pipe_texture *
-identity_drm_texture_from_shared_handle(struct drm_api *_api,
-                                        struct pipe_screen *_screen,
-                                        struct pipe_texture *templ,
-                                        const char *name,
-                                        unsigned stride,
-                                        unsigned handle)
-{
-   struct identity_screen *id_screen = identity_screen(_screen);
-   struct identity_drm_api *id_api = identity_drm_api(_api);
-   struct pipe_screen *screen = id_screen->screen;
-   struct drm_api *api = id_api->api;
-   struct pipe_texture *result;
-
-   result = api->texture_from_shared_handle(api, screen, templ, name, stride, handle);
-
-   result = identity_texture_create(identity_screen(_screen), result);
-
-   return result;
-}
-
-static boolean
-identity_drm_shared_handle_from_texture(struct drm_api *_api,
-                                        struct pipe_screen *_screen,
-                                        struct pipe_texture *_texture,
-                                        unsigned *stride,
-                                        unsigned *handle)
-{
-   struct identity_screen *id_screen = identity_screen(_screen);
-   struct identity_texture *id_texture = identity_texture(_texture);
-   struct identity_drm_api *id_api = identity_drm_api(_api);
-   struct pipe_screen *screen = id_screen->screen;
-   struct pipe_texture *texture = id_texture->texture;
-   struct drm_api *api = id_api->api;
-
-   return api->shared_handle_from_texture(api, screen, texture, stride, handle);
-}
-
-static boolean
-identity_drm_local_handle_from_texture(struct drm_api *_api,
-                                       struct pipe_screen *_screen,
-                                       struct pipe_texture *_texture,
-                                       unsigned *stride,
-                                       unsigned *handle)
-{
-   struct identity_screen *id_screen = identity_screen(_screen);
-   struct identity_texture *id_texture = identity_texture(_texture);
-   struct identity_drm_api *id_api = identity_drm_api(_api);
-   struct pipe_screen *screen = id_screen->screen;
-   struct pipe_texture *texture = id_texture->texture;
-   struct drm_api *api = id_api->api;
-
-   return api->local_handle_from_texture(api, screen, texture, stride, handle);
-}
-
 static void
 identity_drm_destroy(struct drm_api *_api)
 {
@@ -145,9 +89,6 @@ identity_drm_create(struct drm_api *api)
    id_api->base.name = api->name;
    id_api->base.driver_name = api->driver_name;
    id_api->base.create_screen = identity_drm_create_screen;
-   id_api->base.texture_from_shared_handle = identity_drm_texture_from_shared_handle;
-   id_api->base.shared_handle_from_texture = identity_drm_shared_handle_from_texture;
-   id_api->base.local_handle_from_texture = identity_drm_local_handle_from_texture;
    id_api->base.destroy = identity_drm_destroy;
    id_api->api = api;
 
diff --git a/src/gallium/drivers/identity/id_screen.c b/src/gallium/drivers/identity/id_screen.c
index b85492114a..77e15b92f7 100644
--- a/src/gallium/drivers/identity/id_screen.c
+++ b/src/gallium/drivers/identity/id_screen.c
@@ -135,6 +135,39 @@ identity_screen_texture_create(struct pipe_screen *_screen,
 }
 
 static struct pipe_texture *
+identity_screen_texture_from_handle(struct pipe_screen *_screen,
+                                    const struct pipe_texture *templ,
+                                    struct winsys_handle *handle)
+{
+   struct identity_screen *id_screen = identity_screen(_screen);
+   struct pipe_screen *screen = id_screen->screen;
+   struct pipe_texture *result;
+
+   /* TODO trace call */
+
+   result = screen->texture_from_handle(screen, templ, handle);
+
+   result = identity_texture_create(identity_screen(_screen), result);
+
+   return result;
+}
+
+static boolean
+identity_screen_texture_get_handle(struct pipe_screen *_screen,
+                                   struct pipe_texture *_texture,
+                                   struct winsys_handle *handle)
+{
+   struct identity_screen *id_screen = identity_screen(_screen);
+   struct identity_texture *id_texture = identity_texture(_texture);
+   struct pipe_screen *screen = id_screen->screen;
+   struct pipe_texture *texture = id_texture->texture;
+
+   /* TODO trace call */
+
+   return screen->texture_get_handle(screen, texture, handle);
+}
+
+static struct pipe_texture *
 identity_screen_texture_blanket(struct pipe_screen *_screen,
                                 const struct pipe_texture *templat,
                                 const unsigned *stride,
@@ -495,6 +528,8 @@ identity_screen_create(struct pipe_screen *screen)
    id_screen->base.is_format_supported = identity_screen_is_format_supported;
    id_screen->base.context_create = identity_screen_context_create;
    id_screen->base.texture_create = identity_screen_texture_create;
+   id_screen->base.texture_from_handle = identity_screen_texture_from_handle;
+   id_screen->base.texture_get_handle = identity_screen_texture_get_handle;
    id_screen->base.texture_blanket = identity_screen_texture_blanket;
    id_screen->base.texture_destroy = identity_screen_texture_destroy;
    id_screen->base.get_tex_surface = identity_screen_get_tex_surface;
diff --git a/src/gallium/drivers/trace/tr_drm.c b/src/gallium/drivers/trace/tr_drm.c
index 2b4915003e..c16989fa52 100644
--- a/src/gallium/drivers/trace/tr_drm.c
+++ b/src/gallium/drivers/trace/tr_drm.c
@@ -62,69 +62,8 @@ trace_drm_create_screen(struct drm_api *_api, int fd,
 
    screen = api->create_screen(api, fd, arg);
 
-   return trace_screen_create(screen);
-}
-
-
-static struct pipe_texture *
-trace_drm_texture_from_shared_handle(struct drm_api *_api,
-                                     struct pipe_screen *_screen,
-                                     struct pipe_texture *templ,
-                                     const char *name,
-                                     unsigned stride,
-                                     unsigned handle)
-{
-   struct trace_screen *tr_screen = trace_screen(_screen);
-   struct trace_drm_api *tr_api = trace_drm_api(_api);
-   struct pipe_screen *screen = tr_screen->screen;
-   struct drm_api *api = tr_api->api;
-   struct pipe_texture *result;
-
-   /* TODO trace call */
-
-   result = api->texture_from_shared_handle(api, screen, templ, name, stride, handle);
-
-   result = trace_texture_create(trace_screen(_screen), result);
-
-   return result;
-}
-
-static boolean
-trace_drm_shared_handle_from_texture(struct drm_api *_api,
-                                     struct pipe_screen *_screen,
-                                     struct pipe_texture *_texture,
-                                     unsigned *stride,
-                                     unsigned *handle)
-{
-   struct trace_screen *tr_screen = trace_screen(_screen);
-   struct trace_texture *tr_texture = trace_texture(_texture);
-   struct trace_drm_api *tr_api = trace_drm_api(_api);
-   struct pipe_screen *screen = tr_screen->screen;
-   struct pipe_texture *texture = tr_texture->texture;
-   struct drm_api *api = tr_api->api;
-
-   /* TODO trace call */
-
-   return api->shared_handle_from_texture(api, screen, texture, stride, handle);
-}
 
-static boolean
-trace_drm_local_handle_from_texture(struct drm_api *_api,
-                                    struct pipe_screen *_screen,
-                                    struct pipe_texture *_texture,
-                                    unsigned *stride,
-                                    unsigned *handle)
-{
-   struct trace_screen *tr_screen = trace_screen(_screen);
-   struct trace_texture *tr_texture = trace_texture(_texture);
-   struct trace_drm_api *tr_api = trace_drm_api(_api);
-   struct pipe_screen *screen = tr_screen->screen;
-   struct pipe_texture *texture = tr_texture->texture;
-   struct drm_api *api = tr_api->api;
-
-   /* TODO trace call */
-
-   return api->local_handle_from_texture(api, screen, texture, stride, handle);
+   return trace_screen_create(screen);
 }
 
 static void
@@ -158,9 +97,6 @@ trace_drm_create(struct drm_api *api)
    tr_api->base.name = api->name;
    tr_api->base.driver_name = api->driver_name;
    tr_api->base.create_screen = trace_drm_create_screen;
-   tr_api->base.texture_from_shared_handle = trace_drm_texture_from_shared_handle;
-   tr_api->base.shared_handle_from_texture = trace_drm_shared_handle_from_texture;
-   tr_api->base.local_handle_from_texture = trace_drm_local_handle_from_texture;
    tr_api->base.destroy = trace_drm_destroy;
    tr_api->api = api;
 
diff --git a/src/gallium/drivers/trace/tr_screen.c b/src/gallium/drivers/trace/tr_screen.c
index 388d83eb5c..ac0876c3a8 100644
--- a/src/gallium/drivers/trace/tr_screen.c
+++ b/src/gallium/drivers/trace/tr_screen.c
@@ -236,6 +236,38 @@ trace_screen_texture_create(struct pipe_screen *_screen,
    return result;
 }
 
+static struct pipe_texture *
+trace_screen_texture_from_handle(struct pipe_screen *_screen,
+                                 const struct pipe_texture *templ,
+                                 struct winsys_handle *handle)
+{
+   struct trace_screen *tr_screen = trace_screen(_screen);
+   struct pipe_screen *screen = tr_screen->screen;
+   struct pipe_texture *result;
+
+   /* TODO trace call */
+
+   result = screen->texture_from_handle(screen, templ, handle);
+
+   result = trace_texture_create(trace_screen(_screen), result);
+
+   return result;
+}
+
+static boolean
+trace_screen_texture_get_handle(struct pipe_screen *_screen,
+                                struct pipe_texture *_texture,
+                                struct winsys_handle *handle)
+{
+   struct trace_screen *tr_screen = trace_screen(_screen);
+   struct trace_texture *tr_texture = trace_texture(_texture);
+   struct pipe_screen *screen = tr_screen->screen;
+   struct pipe_texture *texture = tr_texture->texture;
+
+   /* TODO trace call */
+
+   return screen->texture_get_handle(screen, texture, handle);
+}
 
 static struct pipe_texture *
 trace_screen_texture_blanket(struct pipe_screen *_screen,
@@ -931,6 +963,8 @@ trace_screen_create(struct pipe_screen *screen)
    assert(screen->context_create);
    tr_scr->base.context_create = trace_screen_context_create;
    tr_scr->base.texture_create = trace_screen_texture_create;
+   tr_scr->base.texture_from_handle = trace_screen_texture_from_handle;
+   tr_scr->base.texture_get_handle = trace_screen_texture_get_handle;
    tr_scr->base.texture_blanket = trace_screen_texture_blanket;
    tr_scr->base.texture_destroy = trace_screen_texture_destroy;
    tr_scr->base.get_tex_surface = trace_screen_get_tex_surface;
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index e4a9222809..617c47e4dc 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -50,6 +50,8 @@ extern "C" {
 
 
 /** Opaque type */
+struct winsys_handle;
+/** Opaque type */
 struct pipe_fence_handle;
 struct pipe_winsys;
 struct pipe_buffer;
@@ -108,6 +110,24 @@ struct pipe_screen {
                                            const struct pipe_texture *templat);
 
    /**
+    * Create a texture from a winsys_handle. The handle is often created in
+    * another process by first creating a pipe texture and then calling
+    * texture_get_handle.
+    */
+   struct pipe_texture * (*texture_from_handle)(struct pipe_screen *,
+                                                const struct pipe_texture *templat,
+                                                struct winsys_handle *handle);
+
+   /**
+    * Get a winsys_handle from a texture. Some platforms/winsys requires
+    * that the texture is created with a special usage flag like
+    * DISPLAYTARGET or PRIMARY.
+    */
+   boolean (*texture_get_handle)(struct pipe_screen *,
+                                 struct pipe_texture *tex,
+                                 struct winsys_handle *handle);
+
+   /**
     * Create a new texture object, using the given template info, but on top of
     * existing memory.
     * 
diff --git a/src/gallium/include/state_tracker/drm_api.h b/src/gallium/include/state_tracker/drm_api.h
index e9fa9b4d2a..d3edddd5d4 100644
--- a/src/gallium/include/state_tracker/drm_api.h
+++ b/src/gallium/include/state_tracker/drm_api.h
@@ -17,6 +17,31 @@ 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 +53,8 @@ struct drm_create_screen_arg {
 
 struct drm_api
 {
+	void (*destroy)(struct drm_api *api);
+
         const char *name;
 
 	/**
@@ -36,37 +63,10 @@ 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/state_trackers/dri/dri_drawable.c b/src/gallium/state_trackers/dri/dri_drawable.c
index 4809b9090d..fe91cf59b4 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.c
+++ b/src/gallium/state_trackers/dri/dri_drawable.c
@@ -58,6 +58,7 @@ dri_surface_from_handle(struct drm_api *api,
    struct pipe_surface *surface = NULL;
    struct pipe_texture *texture = NULL;
    struct pipe_texture templat;
+   struct winsys_handle whandle;
 
    memset(&templat, 0, sizeof(templat));
    templat.tex_usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
@@ -68,8 +69,11 @@ dri_surface_from_handle(struct drm_api *api,
    templat.width0 = width;
    templat.height0 = height;
 
-   texture = api->texture_from_shared_handle(api, screen, &templat,
-                                             "dri2 buffer", pitch, handle);
+   memset(&whandle, 0, sizeof(whandle));
+   whandle.handle = handle;
+   whandle.stride = pitch;
+
+   texture = screen->texture_from_handle(screen, &templat, &whandle);
 
    if (!texture) {
       debug_printf("%s: Failed to blanket the buffer with a texture\n", __func__);
diff --git a/src/gallium/state_trackers/egl/x11/native_dri2.c b/src/gallium/state_trackers/egl/x11/native_dri2.c
index 8df58891a0..b80b376e12 100644
--- a/src/gallium/state_trackers/egl/x11/native_dri2.c
+++ b/src/gallium/state_trackers/egl/x11/native_dri2.c
@@ -112,6 +112,7 @@ dri2_surface_process_drawable_buffers(struct native_surface *nsurf,
    struct dri2_surface *dri2surf = dri2_surface(nsurf);
    struct dri2_display *dri2dpy = dri2surf->dri2dpy;
    struct pipe_texture templ;
+   struct winsys_handle whandle;
    uint valid_mask;
    int i;
 
@@ -169,9 +170,11 @@ dri2_surface_process_drawable_buffers(struct native_surface *nsurf,
          continue;
       }
 
-      dri2surf->textures[natt] =
-         dri2dpy->api->texture_from_shared_handle(dri2dpy->api,
-               dri2dpy->base.screen, &templ, desc, xbuf->pitch, xbuf->name);
+      memset(&whandle, 0, sizeof(whandle));
+      whandle.stride = xbuf->pitch;
+      whandle.handle = xbuf->name;
+      dri2surf->textures[natt] = dri2dpy->base.screen->texture_from_handle(
+         dri2dpy->base.screen, &templ, &whandle);
       if (dri2surf->textures[natt])
          valid_mask |= 1 << natt;
    }
diff --git a/src/gallium/state_trackers/xorg/xorg_crtc.c b/src/gallium/state_trackers/xorg/xorg_crtc.c
index 221ce772af..4a77f54080 100644
--- a/src/gallium/state_trackers/xorg/xorg_crtc.c
+++ b/src/gallium/state_trackers/xorg/xorg_crtc.c
@@ -197,7 +197,7 @@ crtc_load_cursor_argb_ga3d(xf86CrtcPtr crtc, CARD32 * image)
 
     if (!crtcp->cursor_tex) {
 	struct pipe_texture templat;
-	unsigned pitch;
+	struct winsys_handle whandle;
 
 	memset(&templat, 0, sizeof(templat));
 	templat.tex_usage |= PIPE_TEXTURE_USAGE_RENDER_TARGET;
@@ -209,13 +209,14 @@ crtc_load_cursor_argb_ga3d(xf86CrtcPtr crtc, CARD32 * image)
 	templat.width0 = 64;
 	templat.height0 = 64;
 
+	memset(&whandle, 0, sizeof(whandle));
+	whandle.type = DRM_API_HANDLE_TYPE_KMS;
+
 	crtcp->cursor_tex = ms->screen->texture_create(ms->screen,
 						       &templat);
-	ms->api->local_handle_from_texture(ms->api,
-					   ms->screen,
-					   crtcp->cursor_tex,
-					   &pitch,
-					   &crtcp->cursor_handle);
+	ms->screen->texture_get_handle(ms->screen, crtcp->cursor_tex, &whandle);
+
+	crtcp->cursor_handle = whandle.handle;
     }
 
     transfer = ms->screen->get_tex_transfer(ms->screen, crtcp->cursor_tex,
diff --git a/src/gallium/state_trackers/xorg/xorg_dri2.c b/src/gallium/state_trackers/xorg/xorg_dri2.c
index 5b67392435..5472285ec1 100644
--- a/src/gallium/state_trackers/xorg/xorg_dri2.c
+++ b/src/gallium/state_trackers/xorg/xorg_dri2.c
@@ -67,7 +67,7 @@ dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int form
     struct exa_pixmap_priv *exa_priv;
     BufferPrivatePtr private = buffer->driverPrivate;
     PixmapPtr pPixmap;
-    unsigned stride, handle;
+    struct winsys_handle whandle;
 
     if (pDraw->type == DRAWABLE_PIXMAP)
 	pPixmap = (PixmapPtr) pDraw;
@@ -75,6 +75,7 @@ dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int form
 	pPixmap = (*pScreen->GetWindowPixmap)((WindowPtr) pDraw);
     exa_priv = exaGetPixmapDriverPrivate(pPixmap);
 
+
     switch (buffer->attachment) {
     default:
 	if (buffer->attachment != DRI2BufferFakeFrontLeft ||
@@ -153,10 +154,13 @@ dri2_do_create_buffer(DrawablePtr pDraw, DRI2BufferPtr buffer, unsigned int form
     if (!tex)
 	FatalError("NO TEXTURE IN DRI2\n");
 
-    ms->api->shared_handle_from_texture(ms->api, ms->screen, tex, &stride, &handle);
+    memset(&whandle, 0, sizeof(whandle));
+    whandle.type = DRM_API_HANDLE_TYPE_SHARED;
+
+    ms->screen->texture_get_handle(ms->screen, tex, &whandle);
 
-    buffer->name = handle;
-    buffer->pitch = stride;
+    buffer->name = whandle.handle;
+    buffer->pitch = whandle.stride;
     buffer->cpp = 4;
     buffer->driverPrivate = private;
     buffer->flags = 0; /* not tiled */
diff --git a/src/gallium/state_trackers/xorg/xorg_driver.c b/src/gallium/state_trackers/xorg/xorg_driver.c
index 8fb6e5a96d..004a28f00e 100644
--- a/src/gallium/state_trackers/xorg/xorg_driver.c
+++ b/src/gallium/state_trackers/xorg/xorg_driver.c
@@ -989,8 +989,9 @@ static Bool
 drv_create_front_buffer_ga3d(ScrnInfoPtr pScrn)
 {
     modesettingPtr ms = modesettingPTR(pScrn);
-    unsigned handle, stride, fb_id;
     struct pipe_texture *tex;
+    struct winsys_handle whandle;
+    unsigned fb_id;
     int ret;
 
     ms->noEvict = TRUE;
@@ -1001,10 +1002,10 @@ drv_create_front_buffer_ga3d(ScrnInfoPtr pScrn)
     if (!tex)
 	return FALSE;
 
-    if (!ms->api->local_handle_from_texture(ms->api, ms->screen,
-					    tex,
-					    &stride,
-					    &handle))
+    memset(&whandle, 0, sizeof(whandle));
+    whandle.type = DRM_API_HANDLE_TYPE_KMS;
+
+    if (!ms->screen->texture_get_handle(ms->screen, tex, &whandle))
 	goto err_destroy;
 
     ret = drmModeAddFB(ms->fd,
@@ -1012,8 +1013,8 @@ drv_create_front_buffer_ga3d(ScrnInfoPtr pScrn)
 		       pScrn->virtualY,
 		       pScrn->depth,
 		       pScrn->bitsPerPixel,
-		       stride,
-		       handle,
+		       whandle.stride,
+		       whandle.handle,
 		       &fb_id);
     if (ret) {
 	debug_printf("%s: failed to create framebuffer (%i, %s)\n",