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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "surface_glue_android.h"
#include <jni.h>
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <unordered_map>
#include <android/input.h>
#include <android/keycodes.h>
#include <android/looper.h>
#include <android/native_window_jni.h>
#include "../Application.h"
#include "SkTypes.h"
#include "SkUtils.h"
#include "Window_android.h"
namespace sk_app {
static const int LOOPER_ID_MESSAGEPIPE = 1;
static const std::unordered_map<int, Window::Key> ANDROID_TO_WINDOW_KEYMAP({
{AKEYCODE_SOFT_LEFT, Window::Key::kLeft},
{AKEYCODE_SOFT_RIGHT, Window::Key::kRight}
});
static const std::unordered_map<int, Window::InputState> ANDROID_TO_WINDOW_STATEMAP({
{AMOTION_EVENT_ACTION_DOWN, Window::kDown_InputState},
{AMOTION_EVENT_ACTION_POINTER_DOWN, Window::kDown_InputState},
{AMOTION_EVENT_ACTION_UP, Window::kUp_InputState},
{AMOTION_EVENT_ACTION_POINTER_UP, Window::kUp_InputState},
{AMOTION_EVENT_ACTION_MOVE, Window::kMove_InputState},
{AMOTION_EVENT_ACTION_CANCEL, Window::kUp_InputState},
});
SkiaAndroidApp::SkiaAndroidApp(JNIEnv* env, jobject androidApp) {
env->GetJavaVM(&fJavaVM);
fAndroidApp = env->NewGlobalRef(androidApp);
jclass cls = env->GetObjectClass(fAndroidApp);
fSetTitleMethodID = env->GetMethodID(cls, "setTitle", "(Ljava/lang/String;)V");
fNativeWindow = nullptr;
pthread_create(&fThread, nullptr, pthread_main, this);
}
SkiaAndroidApp::~SkiaAndroidApp() {
fPThreadEnv->DeleteGlobalRef(fAndroidApp);
if (fWindow) {
fWindow->detach();
}
if (fNativeWindow) {
ANativeWindow_release(fNativeWindow);
fNativeWindow = nullptr;
}
if (fApp) {
delete fApp;
}
}
void SkiaAndroidApp::setTitle(const char* title) const {
jstring titleString = fPThreadEnv->NewStringUTF(title);
fPThreadEnv->CallVoidMethod(fAndroidApp, fSetTitleMethodID, titleString);
fPThreadEnv->DeleteLocalRef(titleString);
}
void SkiaAndroidApp::paintIfNeeded() {
if (fNativeWindow && fWindow) {
fWindow->onPaint();
}
}
void SkiaAndroidApp::postMessage(const Message& message) const {
SkDEBUGCODE(auto writeSize =) write(fPipes[1], &message, sizeof(message));
SkASSERT(writeSize == sizeof(message));
}
void SkiaAndroidApp::readMessage(Message* message) const {
SkDEBUGCODE(auto readSize =) read(fPipes[0], message, sizeof(Message));
SkASSERT(readSize == sizeof(Message));
}
void SkiaAndroidApp::inval() {
SkAutoMutexAcquire ama(fMutex);
if (!fIsContentInvalidated) {
postMessage(Message(kContentInvalidated));
fIsContentInvalidated = true;
}
}
int SkiaAndroidApp::message_callback(int fd, int events, void* data) {
auto skiaAndroidApp = (SkiaAndroidApp*)data;
Message message;
skiaAndroidApp->readMessage(&message);
SkDebugf("message_callback %d", message.fType);
SkASSERT(message.fType != kUndefined);
switch (message.fType) {
case kDestroyApp: {
delete skiaAndroidApp;
pthread_exit(nullptr);
return 0;
}
case kContentInvalidated: {
SkAutoMutexAcquire ama(skiaAndroidApp->fMutex);
skiaAndroidApp->fIsContentInvalidated = false;
skiaAndroidApp->paintIfNeeded();
break;
}
case kSurfaceCreated: {
SkASSERT(!skiaAndroidApp->fNativeWindow && message.fNativeWindow);
skiaAndroidApp->fNativeWindow = message.fNativeWindow;
auto window_android = (Window_android*)skiaAndroidApp->fWindow;
window_android->initDisplay(skiaAndroidApp->fNativeWindow);
skiaAndroidApp->paintIfNeeded();
break;
}
case kSurfaceChanged: {
SkASSERT(message.fNativeWindow == skiaAndroidApp->fNativeWindow &&
message.fNativeWindow);
int width = ANativeWindow_getWidth(skiaAndroidApp->fNativeWindow);
int height = ANativeWindow_getHeight(skiaAndroidApp->fNativeWindow);
auto window_android = (Window_android*)skiaAndroidApp->fWindow;
window_android->setContentRect(0, 0, width, height);
skiaAndroidApp->paintIfNeeded();
break;
}
case kSurfaceDestroyed: {
if (skiaAndroidApp->fNativeWindow) {
auto window_android = (Window_android*)skiaAndroidApp->fWindow;
window_android->onDisplayDestroyed();
ANativeWindow_release(skiaAndroidApp->fNativeWindow);
skiaAndroidApp->fNativeWindow = nullptr;
}
break;
}
case kKeyPressed: {
auto it = ANDROID_TO_WINDOW_KEYMAP.find(message.fKeycode);
SkASSERT(it != ANDROID_TO_WINDOW_KEYMAP.end());
// No modifier is supported so far
skiaAndroidApp->fWindow->onKey(it->second, Window::kDown_InputState, 0);
skiaAndroidApp->fWindow->onKey(it->second, Window::kUp_InputState, 0);
break;
}
case kTouched: {
auto it = ANDROID_TO_WINDOW_STATEMAP.find(message.fTouchState);
SkASSERT(it != ANDROID_TO_WINDOW_STATEMAP.end());
skiaAndroidApp->fWindow->onTouch(message.fTouchOwner, it->second, message.fTouchX,
message.fTouchY);
break;
}
default: {
// do nothing
}
}
return 1; // continue receiving callbacks
}
void* SkiaAndroidApp::pthread_main(void* arg) {
SkDebugf("pthread_main begins");
auto skiaAndroidApp = (SkiaAndroidApp*)arg;
// Because JNIEnv is thread sensitive, we need AttachCurrentThread to set our fPThreadEnv
skiaAndroidApp->fJavaVM->AttachCurrentThread(&(skiaAndroidApp->fPThreadEnv), nullptr);
ALooper* looper = ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS);
pipe(skiaAndroidApp->fPipes);
ALooper_addFd(looper, skiaAndroidApp->fPipes[0], LOOPER_ID_MESSAGEPIPE, ALOOPER_EVENT_INPUT,
message_callback, skiaAndroidApp);
int ident;
int events;
struct android_poll_source* source;
skiaAndroidApp->fApp = Application::Create(0, nullptr, skiaAndroidApp);
while ((ident = ALooper_pollAll(-1, nullptr, &events, (void**)&source)) >= 0) {
SkDebugf("ALooper_pollAll ident=%d", ident);
}
return nullptr;
}
extern "C" // extern "C" is needed for JNI (although the method itself is in C++)
JNIEXPORT jlong JNICALL
Java_org_skia_viewer_ViewerApplication_createNativeApp(JNIEnv* env, jobject application) {
SkiaAndroidApp* skiaAndroidApp = new SkiaAndroidApp(env, application);
return (jlong)((size_t)skiaAndroidApp);
}
extern "C" JNIEXPORT void JNICALL Java_org_skia_viewer_ViewerApplication_destroyNativeApp(
JNIEnv* env, jobject application, jlong handle) {
auto skiaAndroidApp = (SkiaAndroidApp*)handle;
skiaAndroidApp->postMessage(Message(kDestroyApp));
}
extern "C" JNIEXPORT void JNICALL Java_org_skia_viewer_ViewerActivity_onSurfaceCreated(
JNIEnv* env, jobject activity, jlong handle, jobject surface) {
auto skiaAndroidApp = (SkiaAndroidApp*)handle;
Message message(kSurfaceCreated);
message.fNativeWindow = ANativeWindow_fromSurface(env, surface);
skiaAndroidApp->postMessage(message);
}
extern "C" JNIEXPORT void JNICALL Java_org_skia_viewer_ViewerActivity_onSurfaceChanged(
JNIEnv* env, jobject activity, jlong handle, jobject surface) {
auto skiaAndroidApp = (SkiaAndroidApp*)handle;
Message message(kSurfaceChanged);
message.fNativeWindow = ANativeWindow_fromSurface(env, surface);
skiaAndroidApp->postMessage(message);
}
extern "C" JNIEXPORT void JNICALL Java_org_skia_viewer_ViewerActivity_onSurfaceDestroyed(
JNIEnv* env, jobject activity, jlong handle) {
auto skiaAndroidApp = (SkiaAndroidApp*)handle;
skiaAndroidApp->postMessage(Message(kSurfaceDestroyed));
}
extern "C" JNIEXPORT void JNICALL Java_org_skia_viewer_ViewerActivity_onKeyPressed(JNIEnv* env,
jobject activity,
jlong handle,
jint keycode) {
auto skiaAndroidApp = (SkiaAndroidApp*)handle;
Message message(kKeyPressed);
message.fKeycode = keycode;
skiaAndroidApp->postMessage(message);
}
extern "C" JNIEXPORT void JNICALL Java_org_skia_viewer_ViewerActivity_onTouched(
JNIEnv* env, jobject activity, jlong handle, jint owner, jfloat x, jfloat y, jint state) {
auto skiaAndroidApp = (SkiaAndroidApp*)handle;
Message message(kTouched);
message.fTouchOwner = owner;
message.fTouchState = state;
message.fTouchX = x;
message.fTouchY = y;
skiaAndroidApp->postMessage(message);
}
} // namespace sk_app
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