graphics: use allocator HAL support library in default impl

Rename Gralloc0Allocator to Gralloc0Hal and make it inherit from
AllocatorHal.  Do the same to Gralloc1Allocator.  Add GrallocLoader
to load either of Gralloc[01]Hal and create a IAllocator instance.

Test: boots and VTS
Change-Id: I09ae680c0086ca9e73e412a34d7cd2f3665d3bc2
diff --git a/graphics/allocator/2.0/default/Android.bp b/graphics/allocator/2.0/default/Android.bp
index f100d96..ed2ecbb 100644
--- a/graphics/allocator/2.0/default/Android.bp
+++ b/graphics/allocator/2.0/default/Android.bp
@@ -3,10 +3,13 @@
     defaults: ["hidl_defaults"],
     vendor: true,
     relative_install_path: "hw",
-    srcs: ["Gralloc.cpp"],
+    srcs: ["passthrough.cpp"],
     static_libs: [
         "android.hardware.graphics.allocator@2.0-passthrough",
     ],
+    header_libs: [
+        "android.hardware.graphics.allocator@2.0-hal",
+    ],
     shared_libs: [
         "android.hardware.graphics.allocator@2.0",
         "libbase",
diff --git a/graphics/allocator/2.0/default/Gralloc.cpp b/graphics/allocator/2.0/default/Gralloc.cpp
deleted file mode 100644
index af578e8..0000000
--- a/graphics/allocator/2.0/default/Gralloc.cpp
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright 2016 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.
- */
-
-#define LOG_TAG "GrallocPassthrough"
-
-#include "Gralloc.h"
-#include "Gralloc0Allocator.h"
-#include "Gralloc1Allocator.h"
-
-#include <log/log.h>
-
-namespace android {
-namespace hardware {
-namespace graphics {
-namespace allocator {
-namespace V2_0 {
-namespace implementation {
-
-IAllocator* HIDL_FETCH_IAllocator(const char* /* name */) {
-    const hw_module_t* module = nullptr;
-    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
-    if (err) {
-        ALOGE("failed to get gralloc module");
-        return nullptr;
-    }
-
-    uint8_t major = (module->module_api_version >> 8) & 0xff;
-    switch (major) {
-        case 1:
-            return new Gralloc1Allocator(module);
-        case 0:
-            return new Gralloc0Allocator(module);
-        default:
-            ALOGE("unknown gralloc module major version %d", major);
-            return nullptr;
-    }
-}
-
-}  // namespace implementation
-}  // namespace V2_0
-}  // namespace allocator
-}  // namespace graphics
-}  // namespace hardware
-}  // namespace android
diff --git a/graphics/allocator/2.0/default/Gralloc.h b/graphics/allocator/2.0/default/Gralloc.h
deleted file mode 100644
index 18c5202..0000000
--- a/graphics/allocator/2.0/default/Gralloc.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2016 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.
- */
-
-#ifndef ANDROID_HARDWARE_GRAPHICS_ALLOCATOR_V2_0_GRALLOC_H
-#define ANDROID_HARDWARE_GRAPHICS_ALLOCATOR_V2_0_GRALLOC_H
-
-#include <android/hardware/graphics/allocator/2.0/IAllocator.h>
-
-namespace android {
-namespace hardware {
-namespace graphics {
-namespace allocator {
-namespace V2_0 {
-namespace implementation {
-
-extern "C" IAllocator* HIDL_FETCH_IAllocator(const char* name);
-
-}  // namespace implementation
-}  // namespace V2_0
-}  // namespace allocator
-}  // namespace graphics
-}  // namespace hardware
-}  // namespace android
-
-#endif  // ANDROID_HARDWARE_GRAPHICS_ALLOCATOR_V2_0_GRALLOC_H
diff --git a/graphics/allocator/2.0/default/passthrough.cpp b/graphics/allocator/2.0/default/passthrough.cpp
new file mode 100644
index 0000000..132cab3
--- /dev/null
+++ b/graphics/allocator/2.0/default/passthrough.cpp
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2016 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 <allocator-passthrough/2.0/GrallocLoader.h>
+#include <android/hardware/graphics/allocator/2.0/IAllocator.h>
+
+using android::hardware::graphics::allocator::V2_0::IAllocator;
+using android::hardware::graphics::allocator::V2_0::passthrough::GrallocLoader;
+
+extern "C" IAllocator* HIDL_FETCH_IAllocator(const char* /* name */) {
+    return GrallocLoader::load();
+}