graphics: preserve stencil view layers through uploads and clears

src/graphics/host_gpu/renderer/image/image.cpp

@@ -673,7 +673,9 @@ Prospero::BufferFormat RenderTargetTransferFormat(uint32_t bytes_per_element) {
 } // namespace ImageOps
 
 Image::Image(GraphicContext& graphics, CommandScheduler& scheduler, const ImageInfo& image_info)
-    : info(image_info), m_graphics(graphics), m_scheduler(scheduler) {
+    : info(image_info),
+      stencil_subresources {0, image_info.resources.levels, 0, image_info.resources.layers},
+      m_graphics(graphics), m_scheduler(scheduler) {
 	KYTY_PROFILER_FUNCTION();
 	ImageOps::Validate(info);
 	m_cpu_dirty =

src/graphics/host_gpu/renderer/image/image.h

@@ -148,6 +148,8 @@ public:
 	uint64_t         track_addr     = 0;
 	uint64_t         track_addr_end = 0;
 	ImageId          depth_id {};
+	// The current stencil plane's mapping into the depth image, also retained by its association.
+	ImageSubresourceRange stencil_subresources;
 	uint64_t         tick_accessed_last = 0;
 	size_t           lru_id             = 0;