started setting TextureVK::mipmaps_generated_

Author: gaaclarke

impeller/renderer/backend/vulkan/blit_command_vk.cc

@@ -353,6 +353,7 @@ bool BlitGenerateMipmapCommandVK::Encode(CommandEncoderVK& encoder) const {
   // state so it doesn't try to perform redundant transitions under the hood.
   src.SetLayoutWithoutEncoding(vk::ImageLayout::eShaderReadOnlyOptimal);
 
+  src.SetMipMapGenerated();
   return true;
 }
 

impeller/renderer/backend/vulkan/texture_vk.h

@@ -38,6 +38,8 @@ class TextureVK final : public Texture, public BackendCast<TextureVK, Texture> {
 
   std::shared_ptr<const TextureSourceVK> GetTextureSource() const;
 
+  void SetMipMapGenerated() { mipmap_generated_ = true; }
+
  private:
   std::weak_ptr<Context> context_;
   std::shared_ptr<TextureSourceVK> source_;