graphics: add a default implementation to IAllocator

The default implementatoin is built on top of conventional gralloc1.

This also adds a static library, libgralloc1-adapter.  It is intended to
ease the porting of gralloc0 to gralloc1.

Test: booted to launcher, tested with YouTube and some games.

Change-Id: Id640b1d5a1e1eea1aafabb6c134e6be6e71afff5
diff --git a/graphics/allocator/2.0/default/gralloc1-adapter.h b/graphics/allocator/2.0/default/gralloc1-adapter.h
new file mode 100644
index 0000000..f48cd9e
--- /dev/null
+++ b/graphics/allocator/2.0/default/gralloc1-adapter.h
@@ -0,0 +1,72 @@
+/*
+ * 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_GRALLOC1_ADAPTER_H
+#define ANDROID_HARDWARE_GRALLOC1_ADAPTER_H
+
+#include <stdbool.h>
+#include <hardware/gralloc.h>
+
+__BEGIN_DECLS
+
+struct gralloc1_adapter_buffer_info {
+    int width;
+    int height;
+    int format;
+    int usage;
+
+    int stride;
+    uint32_t num_flex_planes;
+};
+
+/* This struct must be embedded in the HAL's HAL_MODULE_INFO_SYM and must
+ * follow gralloc_module_t immediately. */
+struct gralloc1_adapter {
+    uint16_t real_module_api_version;
+
+    /* Return true if the buffer is registered.  A locally allocated buffer is
+     * always registered.
+     *
+     * This function is called frequently.  It must be thread safe just like
+     * other functions are.
+     */
+    bool (*is_registered)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer);
+
+    /* Set the adapter data for a registered buffer. */
+    void (*set_data)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer, void* data);
+
+    /* Get the adapter data for a registered buffer. */
+    void* (*get_data)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer);
+
+    /* Get the buffer info, such as width, height, etc. */
+    void (*get_info)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer,
+            struct gralloc1_adapter_buffer_info* info);
+
+    /* Get the flexilble layout matching ycbcr. */
+    void (*get_flexible_layout)(const struct gralloc_module_t* mod,
+            buffer_handle_t buffer, const struct android_ycbcr* ycbcr,
+            struct android_flex_layout* layout);
+};
+
+int gralloc1_adapter_device_open(const struct hw_module_t* module,
+        const char* id, struct hw_device_t** device);
+
+__END_DECLS
+
+#endif /* ANDROID_HARDWARE_GRALLOC1_ADAPTER_H */