+ const TextureCube &self = *static_cast<const TextureCube *>(this);
+
+ unsigned level_size = self.get_level_size(level);
+ bool discard = (x==0 && y==0 && wd==level_size && ht==level_size);
+
+ TransferQueue &tq = device.get_transfer_queue();
+ size_t data_size = wd*ht*get_pixel_size(storage_fmt);
+ void *staging = tq.prepare_transfer(this, false, data_size,
+ [this, level, discard](){
+ change_layout(level, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, discard);
+ },
+ [this, face, level, x, y, wd, ht](const VulkanCommandRecorder &vkCmd, VkBuffer staging_buf, size_t src_off){
+ VkBufferImageCopy region = { };
+ region.bufferOffset = src_off;
+ region.imageSubresource.aspectMask = get_vulkan_aspect(get_components(storage_fmt));
+ region.imageSubresource.mipLevel = level;
+ region.imageSubresource.baseArrayLayer = face;
+ region.imageSubresource.layerCount = 1;
+ region.imageOffset = { x, y, 0 };
+ region.imageExtent = { wd, ht, 1 };
+ vkCmd.CopyBufferToImage(staging_buf, handle, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, ®ion);
+ });
+
+ stage_pixels(staging, data, wd*ht);
+ tq.finalize_transfer(staging);