+/**
+ * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
+ */
+void
+llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_sampler_view **views)
+{
+ unsigned i;
+ uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
+ uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
+ const void *data[PIPE_MAX_TEXTURE_LEVELS];
+
+ assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
+ if (!num)
+ return;
+
+ for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+ struct pipe_sampler_view *view = i < num ? views[i] : NULL;
+
+ if (view) {
+ struct pipe_resource *tex = view->texture;
+ struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
+
+ /* We're referencing the texture's internal data, so save a
+ * reference to it.
+ */
+ pipe_resource_reference(&lp->mapped_vs_tex[i], tex);
+
+ if (!lp_tex->dt) {
+ /* regular texture - setup array of mipmap level pointers */
+ int j;
+ for (j = 0; j <= tex->last_level; j++) {
+ data[j] =
+ llvmpipe_get_texture_image_all(lp_tex, j, LP_TEX_USAGE_READ,
+ LP_TEX_LAYOUT_LINEAR);
+ row_stride[j] = lp_tex->row_stride[j];
+ img_stride[j] = lp_tex->img_stride[j];
+ }
+ }
+ else {
+ /* display target texture/surface */
+ /*
+ * XXX: Where should this be unmapped?
+ */
+ struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
+ struct sw_winsys *winsys = screen->winsys;
+ data[0] = winsys->displaytarget_map(winsys, lp_tex->dt,
+ PIPE_TRANSFER_READ);
+ row_stride[0] = lp_tex->row_stride[0];
+ img_stride[0] = lp_tex->img_stride[0];
+ assert(data[0]);
+ }
+ draw_set_mapped_texture(lp->draw,
+ i,
+ tex->width0, tex->height0, tex->depth0,
+ tex->last_level,
+ row_stride, img_stride, data);
+ }
+ }
+}
+
+void
+llvmpipe_cleanup_vertex_sampling(struct llvmpipe_context *ctx)
+{
+ unsigned i;
+ for (i = 0; i < Elements(ctx->mapped_vs_tex); i++) {
+ pipe_resource_reference(&ctx->mapped_vs_tex[i], NULL);
+ }
+}
+