Mercurial > sdl-ios-xcode
view src/SDL_android.cpp @ 4971:158bb5752974
Updated headers to match wiki documentation
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 12 Jan 2011 09:47:33 -0800 |
parents | 6c645018741e |
children | d9fdff945ec9 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2010 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" /******************************************************************************* This file links the Java side of Android with libsdl *******************************************************************************/ #include <jni.h> #include <android/log.h> /******************************************************************************* Globals *******************************************************************************/ JavaVM* mVM = NULL; JNIEnv* mEnv = NULL; JNIEnv* mAudioThreadEnv = NULL; //See the note below for why this is necessary //Main activity jclass mActivityInstance; //method signatures jmethodID midCreateGLContext; jmethodID midFlipBuffers; jmethodID midEnableFeature; jmethodID midUpdateAudio; extern "C" int Android_OnKeyDown(int keycode); extern "C" int Android_OnKeyUp(int keycode); extern "C" void Android_SetScreenResolution(int width, int height); extern "C" void Android_OnResize(int width, int height, int format); extern "C" int SDL_SendQuit(); extern "C" void Android_EnableFeature(int featureid, bool enabled); //If we're not the active app, don't try to render bool bRenderingEnabled = false; //Feature IDs static const int FEATURE_AUDIO = 1; static const int FEATURE_ACCEL = 2; //Accelerometer data storage float fLastAccelerometer[3]; /******************************************************************************* Functions called by JNI *******************************************************************************/ // Library init extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved) { mVM = vm; return JNI_VERSION_1_4; } // Called before SDL_main() to initialize JNI bindings extern "C" void SDL_Android_Init(JNIEnv* env) { mEnv = env; __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init()"); jclass cls = mEnv->FindClass ("org/libsdl/app/SDLActivity"); mActivityInstance = cls; midCreateGLContext = mEnv->GetStaticMethodID(cls,"createGLContext","()V"); midFlipBuffers = mEnv->GetStaticMethodID(cls,"flipBuffers","()V"); midEnableFeature = mEnv->GetStaticMethodID(cls,"enableFeature","(II)V"); midUpdateAudio = mEnv->GetStaticMethodID(cls,"updateAudio","([B)V"); if(!midCreateGLContext || !midFlipBuffers || !midEnableFeature || !midUpdateAudio) { __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Bad mids\n"); } else { #ifdef DEBUG __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Good mids\n"); #endif } } // Keydown extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyDown(JNIEnv* env, jobject obj, jint keycode) { int r = Android_OnKeyDown(keycode); #ifdef DEBUG __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: native key down %d, %d\n", keycode, r); #endif } // Keyup extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyUp(JNIEnv* env, jobject obj, jint keycode) { int r = Android_OnKeyUp(keycode); #ifdef DEBUG __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: native key up %d, %d\n", keycode, r); #endif } // Touch extern "C" void Java_org_libsdl_app_SDLActivity_onNativeTouch(JNIEnv* env, jobject obj, jint action, jfloat x, jfloat y, jfloat p) { #ifdef DEBUG __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: native touch event %d @ %f/%f, pressure %f\n", action, x, y, p); #endif //TODO: Pass this off to the SDL multitouch stuff } // Quit extern "C" void Java_org_libsdl_app_SDLActivity_nativeQuit( JNIEnv* env, jobject obj ) { // Stop rendering as we're no longer in the foreground bRenderingEnabled = false; // Inject a SDL_QUIT event SDL_SendQuit(); } // Screen size extern "C" void Java_org_libsdl_app_SDLActivity_nativeSetScreenSize( JNIEnv* env, jobject obj, jint width, jint height) { __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Set screen size on init: %d/%d\n", width, height); Android_SetScreenResolution(width, height); } // Resize extern "C" void Java_org_libsdl_app_SDLActivity_onNativeResize( JNIEnv* env, jobject obj, jint width, jint height, jint format) { Android_OnResize(width, height, format); } extern "C" void Java_org_libsdl_app_SDLActivity_onNativeAccel( JNIEnv* env, jobject obj, jfloat x, jfloat y, jfloat z) { fLastAccelerometer[0] = x; fLastAccelerometer[1] = y; fLastAccelerometer[2] = z; } /******************************************************************************* Functions called by SDL into Java *******************************************************************************/ extern "C" void Android_CreateContext() { __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: sdl_create_context()\n"); bRenderingEnabled = true; mEnv->CallStaticVoidMethod(mActivityInstance, midCreateGLContext ); } extern "C" void Android_Render() { if (!bRenderingEnabled) { return; } // When we get here, we've accumulated a full frame mEnv->CallStaticVoidMethod(mActivityInstance, midFlipBuffers); } extern "C" void Android_EnableFeature(int featureid, bool enabled) { mEnv->CallStaticVoidMethod(mActivityInstance, midEnableFeature, featureid, (int)enabled); } extern "C" void Android_UpdateAudioBuffer(unsigned char *buf, int len) { //Annoyingly we can't just call into Java from any thread. Because the audio //callback is dispatched from the SDL audio thread (that wasn't made from //java, we have to do some magic here to let the JVM know about the thread. //Because everything it touches on the Java side is static anyway, it's //not a big deal, just annoying. if(!mAudioThreadEnv) { __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: Need to set up audio thread env\n"); mVM->AttachCurrentThread(&mAudioThreadEnv, NULL); __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: ok\n"); } jbyteArray arr = mAudioThreadEnv->NewByteArray(len); //blah. We probably should rework this so we avoid the copy. mAudioThreadEnv->SetByteArrayRegion(arr, 0, len, (jbyte *)buf); __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: copied\n"); mAudioThreadEnv->CallStaticVoidMethod( mActivityInstance, midUpdateAudio, arr ); __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL: invoked\n"); }