- void *ptr = texture_transfer_map_plain(ctx, resolve_tmp, 0, usage, box,
- transfer);
- if (!ptr) {
- pipe_resource_reference(&resolve_tmp, NULL);
- return NULL;
+ void *ptr = texture_transfer_map_plain(ctx, resolve_tmp, 0, usage, &dst_box,
+ &trans->resolve_transfer);
+ if (!ptr)
+ goto fail;
+
+ *transfer = &trans->base;
+ if (fmt == resource->format) {
+ trans->base.stride = trans->resolve_transfer->stride;
+ trans->base.layer_stride = trans->resolve_transfer->layer_stride;
+ return ptr;
+ } else {
+ if (usage & PIPE_TRANSFER_READ) {
+ struct virgl_winsys *vws = virgl_screen(ctx->screen)->vws;
+ void *src = ptr;
+ ptr = vws->resource_map(vws, vtex->hw_res);
+ if (!ptr)
+ goto fail;
+
+ if (!util_format_translate_3d(resource->format,
+ ptr,
+ trans->base.stride,
+ trans->base.layer_stride,
+ box->x, box->y, box->z,
+ fmt,
+ src,
+ trans->resolve_transfer->stride,
+ trans->resolve_transfer->layer_stride,
+ 0, 0, 0,
+ box->width, box->height, box->depth)) {
+ debug_printf("failed to translate format %s to %s\n",
+ util_format_short_name(fmt),
+ util_format_short_name(resource->format));
+ goto fail;
+ }
+ }
+
+ if ((usage & PIPE_TRANSFER_WRITE) == 0)
+ pipe_resource_reference(&trans->resolve_transfer->resource, NULL);
+
+ return ptr + trans->offset;