Function upload_image_to_gpu

framework/gltf_loader.cpp:287–334

}

inline void upload_image_to_gpu(vkb::core::CommandBufferC &command_buffer, vkb::core::BufferC &staging_buffer, sg::Image &image)
{
	// Clean up the image data, as they are copied in the staging buffer
	image.clear_data();

	{
		ImageMemoryBarrier memory_barrier{};
		memory_barrier.old_layout      = VK_IMAGE_LAYOUT_UNDEFINED;
		memory_barrier.new_layout      = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
		memory_barrier.src_access_mask = 0;
		memory_barrier.dst_access_mask = VK_ACCESS_TRANSFER_WRITE_BIT;
		memory_barrier.src_stage_mask  = VK_PIPELINE_STAGE_HOST_BIT;
		memory_barrier.dst_stage_mask  = VK_PIPELINE_STAGE_TRANSFER_BIT;

		command_buffer.image_memory_barrier(image.get_vk_image_view(), memory_barrier);
	}

	// Create a buffer image copy for every mip level
	auto &mipmaps = image.get_mipmaps();

	std::vector<VkBufferImageCopy> buffer_copy_regions(mipmaps.size());

	for (size_t i = 0; i < mipmaps.size(); ++i)
	{
		auto &mipmap      = mipmaps[i];
		auto &copy_region = buffer_copy_regions[i];

		copy_region.bufferOffset     = mipmap.offset;
		copy_region.imageSubresource = image.get_vk_image_view().get_subresource_layers();
		// Update miplevel
		copy_region.imageSubresource.mipLevel = mipmap.level;
		copy_region.imageExtent               = mipmap.extent;
	}

	command_buffer.copy_buffer_to_image(staging_buffer, image.get_vk_image(), buffer_copy_regions);

	{
		ImageMemoryBarrier memory_barrier{};
		memory_barrier.old_layout      = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
		memory_barrier.new_layout      = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
		memory_barrier.src_access_mask = VK_ACCESS_TRANSFER_WRITE_BIT;
		memory_barrier.dst_access_mask = VK_ACCESS_SHADER_READ_BIT;
		memory_barrier.src_stage_mask  = VK_PIPELINE_STAGE_TRANSFER_BIT;
		memory_barrier.dst_stage_mask  = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;

		command_buffer.image_memory_barrier(image.get_vk_image_view(), memory_barrier);
	}
}

inline void prepare_meshlets(std::vector<Meshlet> &meshlets, std::unique_ptr<vkb::sg::SubMesh> &submesh, std::vector<unsigned char> &index_data)
{