[Impeller] Wire-up AndroidSurfaceImpellerVulkan (flutter/engine#37249)

engine/src/flutter/ci/licenses_golden/licenses_flutter

@@ -2144,6 +2144,8 @@ FILE: ../../../flutter/shell/platform/android/android_surface_gl_skia.cc
 FILE: ../../../flutter/shell/platform/android/android_surface_gl_skia.h
 FILE: ../../../flutter/shell/platform/android/android_surface_software.cc
 FILE: ../../../flutter/shell/platform/android/android_surface_software.h
+FILE: ../../../flutter/shell/platform/android/android_surface_vulkan_impeller.cc
+FILE: ../../../flutter/shell/platform/android/android_surface_vulkan_impeller.h
 FILE: ../../../flutter/shell/platform/android/apk_asset_provider.cc
 FILE: ../../../flutter/shell/platform/android/apk_asset_provider.h
 FILE: ../../../flutter/shell/platform/android/apk_asset_provider_unittests.cc

engine/src/flutter/impeller/renderer/backend/vulkan/context_vk.cc

@@ -20,6 +20,7 @@
 #include "impeller/renderer/backend/vulkan/allocator_vk.h"
 #include "impeller/renderer/backend/vulkan/capabilities_vk.h"
 #include "impeller/renderer/backend/vulkan/command_buffer_vk.h"
+#include "impeller/renderer/backend/vulkan/formats_vk.h"
 #include "impeller/renderer/backend/vulkan/surface_producer_vk.h"
 #include "impeller/renderer/backend/vulkan/swapchain_details_vk.h"
 #include "impeller/renderer/backend/vulkan/vk.h"
@@ -563,6 +564,7 @@ void ContextVK::SetupSwapchain(vk::UniqueSurfaceKHR surface) {
   if (!swapchain_details) {
     return;
   }
+  surface_format_ = swapchain_details->PickSurfaceFormat().format;
   swapchain_ = SwapchainVK::Create(*device_, *surface_, *swapchain_details);
   auto weak_this = weak_from_this();
   surface_producer_ = SurfaceProducerVK::Create(
@@ -582,4 +584,8 @@ std::shared_ptr<DescriptorPoolVK> ContextVK::GetDescriptorPool() const {
   return descriptor_pool_;
 }
 
+PixelFormat ContextVK::GetColorAttachmentPixelFormat() const {
+  return ToPixelFormat(surface_format_);
+}
+
 }  // namespace impeller

engine/src/flutter/impeller/renderer/backend/vulkan/context_vk.h

@@ -19,6 +19,7 @@
 #include "impeller/renderer/backend/vulkan/swapchain_vk.h"
 #include "impeller/renderer/backend/vulkan/vk.h"
 #include "impeller/renderer/context.h"
+#include "impeller/renderer/formats.h"
 
 namespace impeller {
 
@@ -85,6 +86,7 @@ class ContextVK final : public Context, public BackendCast<ContextVK, Context> {
   vk::Queue transfer_queue_;
   vk::Queue present_queue_;
   vk::UniqueSurfaceKHR surface_;
+  vk::Format surface_format_;
   std::unique_ptr<SwapchainVK> swapchain_;
   std::unique_ptr<CommandPoolVK> graphics_command_pool_;
   std::unique_ptr<SurfaceProducerVK> surface_producer_;
@@ -114,6 +116,9 @@ class ContextVK final : public Context, public BackendCast<ContextVK, Context> {
   // |Context|
   std::shared_ptr<CommandBuffer> CreateCommandBuffer() const override;
 
+  // |Context|
+  PixelFormat GetColorAttachmentPixelFormat() const override;
+
   // |Context|
   std::shared_ptr<WorkQueue> GetWorkQueue() const override;
 

engine/src/flutter/impeller/renderer/backend/vulkan/pipeline_library_vk.cc

@@ -147,8 +147,9 @@ std::optional<vk::UniqueRenderPass> PipelineLibraryVK::CreateRenderPass(
   std::vector<vk::AttachmentDescription> render_pass_attachments;
   const auto sample_count = desc.GetSampleCount();
   // Set the color attachment.
+  const auto& format = desc.GetColorAttachmentDescriptor(0)->format;
   render_pass_attachments.push_back(CreatePlaceholderAttachmentDescription(
-      vk::Format::eB8G8R8A8Unorm, sample_count, true));
+      ToVKImageFormat(format), sample_count, true));
 
   std::vector<vk::AttachmentReference> color_attachment_references;
   std::vector<vk::AttachmentReference> resolve_attachment_references;

engine/src/flutter/impeller/renderer/backend/vulkan/surface_producer_vk.cc

@@ -65,10 +65,6 @@ std::unique_ptr<Surface> SurfaceProducerVK::AcquireSurface(
     return nullptr;
   }
 
-  if (acuire_image_res == vk::Result::eSuboptimalKHR) {
-    VALIDATION_LOG << "Suboptimal image acquired.";
-  }
-
   SurfaceVK::SwapCallback swap_callback = [this, current_frame, image_index]() {
     return Present(current_frame, image_index);
   };

engine/src/flutter/impeller/renderer/context.cc

@@ -18,4 +18,8 @@ std::shared_ptr<GPUTracer> Context::GetGPUTracer() const {
   return nullptr;
 }
 
+PixelFormat Context::GetColorAttachmentPixelFormat() const {
+  return PixelFormat::kDefaultColor;
+}
+
 }  // namespace impeller

engine/src/flutter/impeller/renderer/context.h

@@ -8,6 +8,7 @@
 #include <string>
 
 #include "flutter/fml/macros.h"
+#include "impeller/renderer/formats.h"
 
 namespace impeller {
 
@@ -45,6 +46,8 @@ class Context : public std::enable_shared_from_this<Context> {
   ///
   virtual std::shared_ptr<GPUTracer> GetGPUTracer() const;
 
+  virtual PixelFormat GetColorAttachmentPixelFormat() const;
+
   virtual bool HasThreadingRestrictions() const;
 
   virtual bool SupportsOffscreenMSAA() const = 0;

engine/src/flutter/impeller/renderer/pipeline_builder.h

@@ -117,9 +117,9 @@ struct PipelineBuilder {
       // Configure the sole color attachments pixel format. This is by
       // convention.
       ColorAttachmentDescriptor color0;
-      color0.format = PixelFormat::kDefaultColor;
+      color0.format = context.GetColorAttachmentPixelFormat();
       color0.blending_enabled = true;
-      desc.SetColorAttachmentDescriptor(0u, std::move(color0));
+      desc.SetColorAttachmentDescriptor(0u, color0);
     }
 
     // Setup default stencil buffer descriptions.

engine/src/flutter/shell/platform/android/BUILD.gn

@@ -13,7 +13,7 @@ import("//flutter/shell/version/version.gni")
 shell_gpu_configuration("android_gpu_configuration") {
   enable_software = true
   enable_gl = true
-  enable_vulkan = false
+  enable_vulkan = true
   enable_metal = false
 }
 
@@ -85,6 +85,8 @@ source_set("flutter_shell_native_src") {
     "android_surface_gl_skia.h",
     "android_surface_software.cc",
     "android_surface_software.h",
+    "android_surface_vulkan_impeller.cc",
+    "android_surface_vulkan_impeller.h",
     "apk_asset_provider.cc",
     "apk_asset_provider.h",
     "flutter_main.cc",
@@ -123,6 +125,7 @@ source_set("flutter_shell_native_src") {
     "//flutter/shell/platform/android/platform_view_android_delegate",
     "//flutter/shell/platform/android/surface",
     "//flutter/shell/platform/android/surface:native_window",
+    "//flutter/vulkan",
     "//third_party/skia",
   ]
 

engine/src/flutter/shell/platform/android/android_surface_vulkan_impeller.cc

@@ -0,0 +1,119 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "flutter/shell/platform/android/android_surface_vulkan_impeller.h"
+
+#include <memory>
+#include <utility>
+
+#include "flutter/fml/concurrent_message_loop.h"
+#include "flutter/fml/logging.h"
+#include "flutter/fml/memory/ref_ptr.h"
+#include "flutter/impeller/renderer/backend/vulkan/context_vk.h"
+#include "flutter/shell/gpu/gpu_surface_vulkan_impeller.h"
+#include "flutter/vulkan/vulkan_native_surface_android.h"
+#include "impeller/entity/vk/entity_shaders_vk.h"
+
+namespace flutter {
+
+std::shared_ptr<impeller::Context> CreateImpellerContext(
+    const fml::RefPtr<vulkan::VulkanProcTable>& proc_table,
+    const std::shared_ptr<fml::ConcurrentMessageLoop>& concurrent_loop) {
+  std::vector<std::shared_ptr<fml::Mapping>> shader_mappings = {
+      std::make_shared<fml::NonOwnedMapping>(impeller_entity_shaders_vk_data,
+                                             impeller_entity_shaders_vk_length),
+  };
+
+  PFN_vkGetInstanceProcAddr instance_proc_addr =
+      proc_table->NativeGetInstanceProcAddr();
+
+  auto context =
+      impeller::ContextVK::Create(instance_proc_addr,                //
+                                  shader_mappings,                   //
+                                  nullptr,                           //
+                                  concurrent_loop->GetTaskRunner(),  //
+                                  "Android Impeller Vulkan Lib"      //
+      );
+
+  return context;
+}
+
+AndroidSurfaceVulkanImpeller::AndroidSurfaceVulkanImpeller(
+    const std::shared_ptr<AndroidContext>& android_context,
+    const std::shared_ptr<PlatformViewAndroidJNI>& jni_facade)
+    : AndroidSurface(android_context),
+      proc_table_(fml::MakeRefCounted<vulkan::VulkanProcTable>()),
+      workers_(fml::ConcurrentMessageLoop::Create()) {
+  impeller_context_ = CreateImpellerContext(proc_table_, workers_);
+  is_valid_ =
+      proc_table_->HasAcquiredMandatoryProcAddresses() && impeller_context_;
+}
+
+AndroidSurfaceVulkanImpeller::~AndroidSurfaceVulkanImpeller() = default;
+
+bool AndroidSurfaceVulkanImpeller::IsValid() const {
+  return is_valid_;
+}
+
+void AndroidSurfaceVulkanImpeller::TeardownOnScreenContext() {
+  // Nothing to do.
+}
+
+std::unique_ptr<Surface> AndroidSurfaceVulkanImpeller::CreateGPUSurface(
+    GrDirectContext* gr_context) {
+  if (!IsValid()) {
+    return nullptr;
+  }
+
+  if (!native_window_ || !native_window_->IsValid()) {
+    return nullptr;
+  }
+
+  std::unique_ptr<GPUSurfaceVulkanImpeller> gpu_surface =
+      std::make_unique<GPUSurfaceVulkanImpeller>(impeller_context_);
+
+  if (!gpu_surface->IsValid()) {
+    return nullptr;
+  }
+
+  return gpu_surface;
+}
+
+bool AndroidSurfaceVulkanImpeller::OnScreenSurfaceResize(const SkISize& size) {
+  return true;
+}
+
+bool AndroidSurfaceVulkanImpeller::ResourceContextMakeCurrent() {
+  FML_DLOG(ERROR) << "The vulkan backend does not support resource contexts.";
+  return false;
+}
+
+bool AndroidSurfaceVulkanImpeller::ResourceContextClearCurrent() {
+  FML_DLOG(ERROR) << "The vulkan backend does not support resource contexts.";
+  return false;
+}
+
+bool AndroidSurfaceVulkanImpeller::SetNativeWindow(
+    fml::RefPtr<AndroidNativeWindow> window) {
+  native_window_ = std::move(window);
+  bool success = native_window_ && native_window_->IsValid();
+
+  if (success) {
+    auto& context_vk = impeller::ContextVK::Cast(*impeller_context_);
+    auto surface = context_vk.CreateAndroidSurface(native_window_->handle());
+
+    if (!surface) {
+      FML_LOG(ERROR) << "Could not create a vulkan surface.";
+      return false;
+    }
+
+    context_vk.SetupSwapchain(std::move(surface));
+    return true;
+  }
+
+  native_window_ = nullptr;
+  return false;
+}
+
+}  // namespace flutter

engine/src/flutter/shell/platform/android/android_surface_vulkan_impeller.h

@@ -0,0 +1,56 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#pragma once
+
+#include "flutter/fml/concurrent_message_loop.h"
+#include "flutter/fml/macros.h"
+#include "flutter/impeller/renderer/context.h"
+#include "flutter/shell/platform/android/surface/android_native_window.h"
+#include "flutter/shell/platform/android/surface/android_surface.h"
+#include "flutter/vulkan/procs/vulkan_proc_table.h"
+
+namespace flutter {
+
+class AndroidSurfaceVulkanImpeller : public AndroidSurface {
+ public:
+  AndroidSurfaceVulkanImpeller(
+      const std::shared_ptr<AndroidContext>& android_context,
+      const std::shared_ptr<PlatformViewAndroidJNI>& jni_facade);
+
+  ~AndroidSurfaceVulkanImpeller() override;
+
+  // |AndroidSurface|
+  bool IsValid() const override;
+
+  // |AndroidSurface|
+  std::unique_ptr<Surface> CreateGPUSurface(
+      GrDirectContext* gr_context) override;
+
+  // |AndroidSurface|
+  void TeardownOnScreenContext() override;
+
+  // |AndroidSurface|
+  bool OnScreenSurfaceResize(const SkISize& size) override;
+
+  // |AndroidSurface|
+  bool ResourceContextMakeCurrent() override;
+
+  // |AndroidSurface|
+  bool ResourceContextClearCurrent() override;
+
+  // |AndroidSurface|
+  bool SetNativeWindow(fml::RefPtr<AndroidNativeWindow> window) override;
+
+ private:
+  fml::RefPtr<vulkan::VulkanProcTable> proc_table_;
+  fml::RefPtr<AndroidNativeWindow> native_window_;
+  std::shared_ptr<fml::ConcurrentMessageLoop> workers_;
+  std::shared_ptr<impeller::Context> impeller_context_;
+  bool is_valid_ = false;
+
+  FML_DISALLOW_COPY_AND_ASSIGN(AndroidSurfaceVulkanImpeller);
+};
+
+}  // namespace flutter

engine/src/flutter/shell/platform/android/platform_view_android.cc

@@ -16,6 +16,7 @@
 #include "flutter/shell/platform/android/android_surface_gl_impeller.h"
 #include "flutter/shell/platform/android/android_surface_gl_skia.h"
 #include "flutter/shell/platform/android/android_surface_software.h"
+#include "flutter/shell/platform/android/android_surface_vulkan_impeller.h"
 #include "flutter/shell/platform/android/context/android_context.h"
 #include "flutter/shell/platform/android/external_view_embedder/external_view_embedder.h"
 #include "flutter/shell/platform/android/jni/platform_view_android_jni.h"
@@ -43,8 +44,15 @@ std::unique_ptr<AndroidSurface> AndroidSurfaceFactoryImpl::CreateSurface() {
                                                       jni_facade_);
     case AndroidRenderingAPI::kOpenGLES:
       if (enable_impeller_) {
+// TODO(kaushikiska@): Enable this after wiring a preference for Vulkan backend.
+#if false
+        return std::make_unique<AndroidSurfaceVulkanImpeller>(android_context_,
+                                                              jni_facade_);
+
+#else
         return std::make_unique<AndroidSurfaceGLImpeller>(android_context_,
                                                           jni_facade_);
+#endif
       } else {
         return std::make_unique<AndroidSurfaceGLSkia>(android_context_,
                                                       jni_facade_);

engine/src/flutter/tools/gn

@@ -436,10 +436,10 @@ def to_gn_args(args):
     gn_args['skia_use_metal'] = True
     gn_args['shell_enable_metal'] = True
 
-  # Enable Vulkan on all platforms except for Android and iOS. This is just
+  # Enable Vulkan on all platforms except for iOS. This is just
   # to save on mobile binary size, as there's no reason the Vulkan embedder
   # features can't work on these platforms.
-  if args.target_os not in ['android', 'ios']:
+  if args.target_os not in ['ios']:
     gn_args['skia_use_vulkan'] = True
     gn_args['skia_use_vma'] = False
     gn_args['shell_enable_vulkan'] = True