Initial commit of our new Android app to demo Skia.

tools/viewer/sk_app/android/surface_glue_android.h

+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#ifndef surface_glue_android_DEFINED
+#define surface_glue_android_DEFINED
+
+#include <pthread.h>
+
+#include <android/native_window_jni.h>
+#include <android_native_app_glue.h>
+
+#include "../Application.h"
+#include "../Window.h"
+
+namespace sk_app {
+
+enum MessageType { kSurfaceCreated, kSurfaceChanged, kSurfaceDestroyed, kDestroyApp };
+
+struct Message {
+    MessageType type;
+
+    Message() {}
+    Message(MessageType t) : type(t) {}
+};
+
+void* pthread_main(void* arg);

[djsollen, 2016/05/06 18:45:26]

we don't need to expose this outside the cpp file. I would like to expose an
extern function like the one below that clients implement to fill in their
function pointers.

extern skia_android_main(struct skia_android_app* app);

[djsollen, 2016/05/06 18:58:53]

Ignore this comment.

+
+struct AppThread {

[djsollen, 2016/05/06 18:45:26]

let's call it something more generic skia_android_app

[liyuqian, 2016/05/06 20:42:30]

Done.

+    pthread_t thread;

[jvanverth1, 2016/05/06 17:02:07]

Again: fThread, fPipes, etc.

[djsollen, 2016/05/06 18:45:26]

make datastructures like fThread private.

[liyuqian, 2016/05/06 20:42:30]

Done.

+    int pipes[2];  // 0 is the read message pipe, 1 is the write message pipe
+    ANativeWindow* nativeWindow;
+    Application* app;
+    Window* window;
+

[djsollen, 2016/05/06 18:45:26]

add a function pointer here that look something like this...

void (*onAppCmd)(struct skia_android_app* app, int32_t cmd);

[djsollen, 2016/05/06 18:58:53]

Ignore this comment.

+    AppThread();
+    ~AppThread();
+    void postMessage(const Message& message);
+    void readMessage(Message* message);
+};
+
+}  // namespace sk_app
+
+#endif