Extract GenericPipelineCreator to its own files

Separate GenericPipelineCreator from the GenericCompositionPlanner
class.

Change-Id: I20db30d9473c808e0f2e2516fb2a1f03ebf93e01

Android.bp

@@ -95,6 +95,7 @@ filegroup {
         "backend/GenericCompositionPlanner.cpp",
         "backend/ClientCompositionPlanner.cpp",
         "backend/BackendManager.cpp",
+        "backend/GenericPipelineCreator.cpp",
 
         "hwc/HwcDisplay.cpp",
         "hwc/HwcDisplayConfigs.cpp",

backend/GenericCompositionPlanner.cpp

@@ -266,22 +266,4 @@ std::tuple<size_t, size_t> GenericCompositionPlanner::GetExtraClientRange(
   return std::make_tuple(client_start, client_size);
 }
 
-class GenericBackendPipelineCreator : public BackendManager::PipelineCreator {
- public:
-  GenericBackendPipelineCreator() : BackendManager::PipelineCreator("generic") {
-  }
-  std::unique_ptr<DrmDisplayPipeline> CreatePipeline(
-      DrmConnector& connector) override {
-    auto pipeline = DrmDisplayPipeline::CreatePipeline(connector);
-    if (pipeline) {
-      pipeline->backend = std::make_unique<GenericCompositionPlanner>();
-    }
-    return pipeline;
-  }
-};
-
-// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables,
-// cert-err58-cpp)
-static GenericBackendPipelineCreator generic_backend;
-
 }  // namespace android::drm_hwcomposer

backend/GenericPipelineCreator.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "backend/GenericPipelineCreator.h"
+
+#include "backend/GenericCompositionPlanner.h"
+#include "drm/DrmDisplayPipeline.h"
+
+namespace android::drm_hwcomposer {
+
+GenericPipelineCreator::GenericPipelineCreator()
+    : BackendManager::PipelineCreator("generic") {
+}
+
+std::unique_ptr<DrmDisplayPipeline> GenericPipelineCreator::CreatePipeline(
+    DrmConnector& connector) {
+  auto pipeline = DrmDisplayPipeline::CreatePipeline(connector);
+  if (pipeline) {
+    pipeline->backend = std::make_unique<GenericCompositionPlanner>();
+  }
+  return pipeline;
+}
+
+// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
+static GenericPipelineCreator generic_pipeline_creator;
+
+}  // namespace android::drm_hwcomposer

backend/GenericPipelineCreator.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "backend/BackendManager.h"
+
+namespace android::drm_hwcomposer {
+
+// Implement the PipelineCreator interface by creating a DrmDisplayPipeline
+// using generic heuristics on top of upstream drm uAPI.
+class GenericPipelineCreator : public BackendManager::PipelineCreator {
+ public:
+  GenericPipelineCreator();
+  std::unique_ptr<DrmDisplayPipeline> CreatePipeline(
+      DrmConnector& connector) override;
+};
+
+}  // namespace android::drm_hwcomposer

meson.build

@@ -15,6 +15,7 @@ src_common = files(
     'backend/BackendManager.cpp',
     'backend/GenericCompositionPlanner.cpp',
     'backend/ClientCompositionPlanner.cpp',
+    'backend/GenericPipelineCreator.cpp',
     'hwc/HwcDisplayConfigs.cpp',
     'hwc/HwcDisplay.cpp',
     'hwc/HwcLayer.cpp',