add invalidate

impeller/core/device_buffer.cc

@@ -12,6 +12,8 @@ DeviceBuffer::~DeviceBuffer() = default;
 
 void DeviceBuffer::Flush(std::optional<Range> range) const {}
 
+void DeviceBuffer::Invalidate(std::optional<Range> range) const {}
+
 // static
 BufferView DeviceBuffer::AsBufferView(std::shared_ptr<DeviceBuffer> buffer) {
   BufferView view;

impeller/core/device_buffer.h

@@ -49,6 +49,8 @@ class DeviceBuffer {
   /// If the range is not provided, the entire buffer is flushed.
   virtual void Flush(std::optional<Range> range = std::nullopt) const;
 
+  virtual void Invalidate(std::optional<Range> range = std::nullopt) const;
+
  protected:
   const DeviceBufferDescriptor desc_;
 

impeller/renderer/backend/vulkan/device_buffer_vk.cc

@@ -5,6 +5,7 @@
 #include "impeller/renderer/backend/vulkan/device_buffer_vk.h"
 
 #include "flutter/fml/trace_event.h"
+#include "flutter_vma/flutter_vma.h"
 #include "impeller/renderer/backend/vulkan/context_vk.h"
 #include "vulkan/vulkan_core.h"
 
@@ -70,6 +71,13 @@ void DeviceBufferVK::Flush(std::optional<Range> range) const {
                        flush_range.length);
 }
 
+void DeviceBufferVK::Invalidate(std::optional<Range> range) const {
+  auto flush_range = range.value_or(Range{0, GetDeviceBufferDescriptor().size});
+  ::vmaInvalidateAllocation(resource_->buffer.get().allocator,
+                            resource_->buffer.get().allocation,
+                            flush_range.offset, flush_range.length);
+}
+
 bool DeviceBufferVK::SetLabel(const std::string& label, Range range) {
   // We do not have the ability to name ranges. Just name the whole thing.
   return SetLabel(label);

impeller/renderer/backend/vulkan/device_buffer_vk.h

@@ -69,6 +69,9 @@ class DeviceBufferVK final : public DeviceBuffer,
   // |DeviceBuffer|
   void Flush(std::optional<Range> range) const override;
 
+  // |DeviceBuffer|
+  void Invalidate(std::optional<Range> range) const override;
+
   DeviceBufferVK(const DeviceBufferVK&) = delete;
 
   DeviceBufferVK& operator=(const DeviceBufferVK&) = delete;

lib/ui/painting/image_encoding_impeller.cc

@@ -166,6 +166,7 @@ void ImageEncodingImpeller::ConvertDlImageToSkImage(
       encode_task(fml::Status(fml::StatusCode::kUnknown, ""));
       return;
     }
+    buffer->Invalidate();
     auto sk_image = ConvertBufferToSkImage(buffer, color_type, dimensions);
     encode_task(sk_image);
   };