- if (!mt->shadow_tex) {
- unsigned old_tex_usage = surface->texture->tex_usage;
- surface->texture->tex_usage = NOUVEAU_TEXTURE_USAGE_LINEAR |
- PIPE_TEXTURE_USAGE_DYNAMIC;
- mt->shadow_tex = screen->texture_create(screen, surface->texture);
- surface->texture->tex_usage = old_tex_usage;
-
- assert(mt->shadow_tex->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR);
- }
-
- mt->shadow_surface = screen->get_tex_surface
- (
- screen, mt->shadow_tex,
- surface->face, surface->level, surface->zslice,
- surface->usage
- );
-
- surface_to_map = mt->shadow_surface;
- }
- else
- surface_to_map = surface;
-
- assert(surface_to_map);
-
- map = ws->buffer_map(ws, surface_to_map->buffer, flags);
- if (!map)
- return NULL;
-
- return map + surface_to_map->offset;
-}
-
-static void
-nv40_surface_unmap(struct pipe_screen *screen, struct pipe_surface *surface)
-{
- struct pipe_winsys *ws = screen->winsys;
- struct pipe_surface *surface_to_unmap;
-
- /* TODO: Copy from shadow just before push buffer is flushed instead.
- There are probably some programs that map/unmap excessively
- before rendering. */
- if (!(surface->texture->tex_usage & NOUVEAU_TEXTURE_USAGE_LINEAR)) {
- struct nv40_miptree *mt = (struct nv40_miptree *)surface->texture;
-
- assert(mt->shadow_tex);
-
- surface_to_unmap = mt->shadow_surface;
- }
- else
- surface_to_unmap = surface;
-
- assert(surface_to_unmap);
-
- ws->buffer_unmap(ws, surface_to_unmap->buffer);
-
- if (surface_to_unmap != surface) {
- struct nv40_screen *nvscreen = nv40_screen(screen);
-
- nvscreen->nvws->surface_copy(nvscreen->nvws,
- surface, 0, 0,
- surface_to_unmap, 0, 0,
- surface->width, surface->height);
- }