34f7142b5a
EGL is a poor source of window dimensions. On some fraction of rotations, it reported the old dimensions. Switch to extracting the data from ANativeWindow, which appears to be more reliable. While here, plumb through orientation, and follow the recommendation in the Android platform docs to block onNativeWindowRedrawNeeded until the draw is complete. Fixes golang/go#11741. Change-Id: I6b29b6a1e5743c612c9af2a8cce4260c5d7e9ca6 Reviewed-on: https://go-review.googlesource.com/12381 Reviewed-by: Nigel Tao <nigeltao@golang.org>
104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build android
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#include <android/log.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <jni.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include "_cgo_export.h"
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#define LOG_INFO(...) __android_log_print(ANDROID_LOG_INFO, "Go", __VA_ARGS__)
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#define LOG_FATAL(...) __android_log_print(ANDROID_LOG_FATAL, "Go", __VA_ARGS__)
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static jclass find_class(JNIEnv *env, const char *class_name) {
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jclass clazz = (*env)->FindClass(env, class_name);
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if (clazz == NULL) {
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(*env)->ExceptionClear(env);
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LOG_FATAL("cannot find %s", class_name);
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return NULL;
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}
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return clazz;
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}
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static jmethodID find_method(JNIEnv *env, jclass clazz, const char *name, const char *sig) {
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jmethodID m = (*env)->GetMethodID(env, clazz, name, sig);
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if (m == 0) {
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(*env)->ExceptionClear(env);
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LOG_FATAL("cannot find method %s %s", name, sig);
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return 0;
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}
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return m;
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}
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jint JNI_OnLoad(JavaVM* vm, void* reserved) {
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JNIEnv* env;
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if ((*vm)->GetEnv(vm, (void**)&env, JNI_VERSION_1_6) != JNI_OK) {
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return -1;
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}
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// Load classes here, which uses the correct ClassLoader.
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current_ctx_clazz = find_class(env, "org/golang/app/GoNativeActivity");
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current_ctx_clazz = (jclass)(*env)->NewGlobalRef(env, current_ctx_clazz);
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return JNI_VERSION_1_6;
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}
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// Entry point from our subclassed NativeActivity.
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//
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// By here, the Go runtime has been initialized (as we are running in
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// -buildmode=c-shared) but main.main hasn't been called yet.
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void ANativeActivity_onCreate(ANativeActivity *activity, void* savedState, size_t savedStateSize) {
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JNIEnv* env = activity->env;
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// Note that activity->clazz is mis-named.
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JavaVM* current_vm = activity->vm;
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jobject current_ctx = activity->clazz;
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setCurrentContext(current_vm, (*env)->NewGlobalRef(env, current_ctx));
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// Set TMPDIR.
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jmethodID gettmpdir = find_method(env, current_ctx_clazz, "getTmpdir", "()Ljava/lang/String;");
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jstring jpath = (jstring)(*env)->CallObjectMethod(env, current_ctx, gettmpdir, NULL);
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const char* tmpdir = (*env)->GetStringUTFChars(env, jpath, NULL);
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if (setenv("TMPDIR", tmpdir, 1) != 0) {
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LOG_INFO("setenv(\"TMPDIR\", \"%s\", 1) failed: %d", tmpdir, errno);
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}
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(*env)->ReleaseStringUTFChars(env, jpath, tmpdir);
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// Call the Go main.main.
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uintptr_t mainPC = (uintptr_t)dlsym(RTLD_DEFAULT, "main.main");
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if (!mainPC) {
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LOG_FATAL("missing main.main");
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}
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callMain(mainPC);
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// These functions match the methods on Activity, described at
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// http://developer.android.com/reference/android/app/Activity.html
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activity->callbacks->onStart = onStart;
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activity->callbacks->onResume = onResume;
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activity->callbacks->onSaveInstanceState = onSaveInstanceState;
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activity->callbacks->onPause = onPause;
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activity->callbacks->onStop = onStop;
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activity->callbacks->onDestroy = onDestroy;
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activity->callbacks->onWindowFocusChanged = onWindowFocusChanged;
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activity->callbacks->onNativeWindowCreated = onNativeWindowCreated;
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activity->callbacks->onNativeWindowRedrawNeeded = onNativeWindowRedrawNeeded;
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activity->callbacks->onNativeWindowDestroyed = onNativeWindowDestroyed;
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activity->callbacks->onInputQueueCreated = onInputQueueCreated;
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activity->callbacks->onInputQueueDestroyed = onInputQueueDestroyed;
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activity->callbacks->onConfigurationChanged = onConfigurationChanged;
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activity->callbacks->onLowMemory = onLowMemory;
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// Note that onNativeWindowResized is not called on resize. Avoid it.
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// https://code.google.com/p/android/issues/detail?id=180645
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onCreate(activity);
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}
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