st/xorg: Miscellaneous XVideo fixes.

* Make sure the destination pixmap has a texture to render into.
* Fix damage reporting so the EXA migration code can do the right thing.
* Fix destination coordinates for redirected windows.

src/gallium/state_trackers/xorg/xorg_xv.c

@@ -446,6 +446,11 @@ display_video(ScrnInfoPtr pScrn, struct xorg_xv_port_priv *pPriv, int id,
    int x, y, w, h;
    struct exa_pixmap_priv *dst = exaGetPixmapDriverPrivate(pPixmap);
 
+   if (!dst->tex) {
+	xorg_exa_set_shared_usage(pPixmap);
+	pScrn->pScreen->ModifyPixmapHeader(pPixmap, 0, 0, 0, 0, 0, NULL);
+   }
+
    if (!dst || !dst->tex)
       XORG_FALLBACK("Xv destination %s", !dst ? "!dst" : "!dst->tex");
 
@@ -469,6 +474,9 @@ display_video(ScrnInfoPtr pScrn, struct xorg_xv_port_priv *pPriv, int id,
    setup_vs_video_constants(pPriv->r, dst);
    setup_fs_video_constants(pPriv->r, hdtv);
 
+   exaMoveInPixmap(pPixmap);
+   DamageDamageRegion(&pPixmap->drawable, dstRegion);
+
    while (nbox--) {
       int box_x1 = pbox->x1;
       int box_y1 = pbox->y1;
@@ -476,8 +484,8 @@ display_video(ScrnInfoPtr pScrn, struct xorg_xv_port_priv *pPriv, int id,
       int box_y2 = pbox->y2;
       float diff_x = (float)src_w / (float)dst_w;
       float diff_y = (float)src_h / (float)dst_h;
-      int offset_x = box_x1 - dstX;
-      int offset_y = box_y1 - dstY;
+      int offset_x = box_x1 - dstX + pPixmap->screen_x;
+      int offset_y = box_y1 - dstY + pPixmap->screen_y;
       int offset_w;
       int offset_h;
 
@@ -495,7 +503,7 @@ display_video(ScrnInfoPtr pScrn, struct xorg_xv_port_priv *pPriv, int id,
 
       pbox++;
    }
-   DamageDamageRegion(&pPixmap->drawable, dstRegion);
+   DamageRegionProcessPending(&pPixmap->drawable);
 
    return TRUE;
 }