mirror of
https://github.com/yawut/SDL.git
synced 2026-06-03 14:45:08 -05:00
edc8ca6ac0
* Set SDL error string with Java exception details when one occurs * Fix tabulation of SDLActivity::getContext
550 lines
18 KiB
C++
550 lines
18 KiB
C++
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#include "SDL_stdinc.h"
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#include "SDL_android.h"
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extern "C" {
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#include "../../events/SDL_events_c.h"
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#include "../../video/android/SDL_androidkeyboard.h"
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#include "../../video/android/SDL_androidtouch.h"
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#include "../../video/android/SDL_androidvideo.h"
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/* Impelemented in audio/android/SDL_androidaudio.c */
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extern void Android_RunAudioThread();
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} // C
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/*******************************************************************************
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This file links the Java side of Android with libsdl
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*******************************************************************************/
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#include <jni.h>
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#include <android/log.h>
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/*******************************************************************************
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Globals
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*******************************************************************************/
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static JNIEnv* mEnv = NULL;
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static JNIEnv* mAudioEnv = NULL;
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// Main activity
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static jclass mActivityClass;
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// method signatures
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static jmethodID midCreateGLContext;
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static jmethodID midFlipBuffers;
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static jmethodID midAudioInit;
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static jmethodID midAudioWriteShortBuffer;
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static jmethodID midAudioWriteByteBuffer;
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static jmethodID midAudioQuit;
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// Accelerometer data storage
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static float fLastAccelerometer[3];
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/*******************************************************************************
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Functions called by JNI
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*******************************************************************************/
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// Library init
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extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved)
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{
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return JNI_VERSION_1_4;
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}
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// Called before SDL_main() to initialize JNI bindings
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extern "C" void SDL_Android_Init(JNIEnv* env, jclass cls)
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{
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__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init()");
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mEnv = env;
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mActivityClass = cls;
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midCreateGLContext = mEnv->GetStaticMethodID(mActivityClass,
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"createGLContext","(II)Z");
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midFlipBuffers = mEnv->GetStaticMethodID(mActivityClass,
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"flipBuffers","()V");
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midAudioInit = mEnv->GetStaticMethodID(mActivityClass,
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"audioInit", "(IZZI)Ljava/lang/Object;");
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midAudioWriteShortBuffer = mEnv->GetStaticMethodID(mActivityClass,
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"audioWriteShortBuffer", "([S)V");
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midAudioWriteByteBuffer = mEnv->GetStaticMethodID(mActivityClass,
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"audioWriteByteBuffer", "([B)V");
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midAudioQuit = mEnv->GetStaticMethodID(mActivityClass,
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"audioQuit", "()V");
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if(!midCreateGLContext || !midFlipBuffers || !midAudioInit ||
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!midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioQuit) {
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__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL: Couldn't locate Java callbacks, check that they're named and typed correctly");
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}
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}
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// Resize
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeResize(
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JNIEnv* env, jclass jcls,
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jint width, jint height, jint format)
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{
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Android_SetScreenResolution(width, height, format);
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}
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// Keydown
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyDown(
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JNIEnv* env, jclass jcls, jint keycode)
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{
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Android_OnKeyDown(keycode);
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}
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// Keyup
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyUp(
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JNIEnv* env, jclass jcls, jint keycode)
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{
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Android_OnKeyUp(keycode);
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}
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// Touch
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeTouch(
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JNIEnv* env, jclass jcls,
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jint action, jfloat x, jfloat y, jfloat p)
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{
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Android_OnTouch(action, x, y, p);
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}
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// Accelerometer
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeAccel(
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JNIEnv* env, jclass jcls,
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jfloat x, jfloat y, jfloat z)
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{
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fLastAccelerometer[0] = x;
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fLastAccelerometer[1] = y;
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fLastAccelerometer[2] = z;
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}
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// Quit
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extern "C" void Java_org_libsdl_app_SDLActivity_nativeQuit(
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JNIEnv* env, jclass cls)
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{
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// Inject a SDL_QUIT event
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SDL_SendQuit();
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}
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extern "C" void Java_org_libsdl_app_SDLActivity_nativeRunAudioThread(
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JNIEnv* env, jclass cls)
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{
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/* This is the audio thread, with a different environment */
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mAudioEnv = env;
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Android_RunAudioThread();
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}
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/*******************************************************************************
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Functions called by SDL into Java
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*******************************************************************************/
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extern "C" SDL_bool Android_JNI_CreateContext(int majorVersion, int minorVersion)
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{
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if (mEnv->CallStaticBooleanMethod(mActivityClass, midCreateGLContext, majorVersion, minorVersion)) {
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return SDL_TRUE;
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} else {
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return SDL_FALSE;
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}
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}
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extern "C" void Android_JNI_SwapWindow()
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{
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mEnv->CallStaticVoidMethod(mActivityClass, midFlipBuffers);
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}
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extern "C" void Android_JNI_SetActivityTitle(const char *title)
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{
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jmethodID mid;
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mid = mEnv->GetStaticMethodID(mActivityClass,"setActivityTitle","(Ljava/lang/String;)V");
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if (mid) {
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mEnv->CallStaticVoidMethod(mActivityClass, mid, mEnv->NewStringUTF(title));
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}
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}
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extern "C" void Android_JNI_GetAccelerometerValues(float values[3])
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{
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int i;
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for (i = 0; i < 3; ++i) {
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values[i] = fLastAccelerometer[i];
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}
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}
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//
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// Audio support
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//
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static jboolean audioBuffer16Bit = JNI_FALSE;
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static jboolean audioBufferStereo = JNI_FALSE;
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static jobject audioBuffer = NULL;
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static void* audioBufferPinned = NULL;
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extern "C" int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames)
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{
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int audioBufferFrames;
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__android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device");
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audioBuffer16Bit = is16Bit;
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audioBufferStereo = channelCount > 1;
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audioBuffer = mEnv->CallStaticObjectMethod(mActivityClass, midAudioInit, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames);
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if (audioBuffer == NULL) {
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__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: didn't get back a good audio buffer!");
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return 0;
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}
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audioBuffer = mEnv->NewGlobalRef(audioBuffer);
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jboolean isCopy = JNI_FALSE;
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if (audioBuffer16Bit) {
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audioBufferPinned = mEnv->GetShortArrayElements((jshortArray)audioBuffer, &isCopy);
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audioBufferFrames = mEnv->GetArrayLength((jshortArray)audioBuffer);
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} else {
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audioBufferPinned = mEnv->GetByteArrayElements((jbyteArray)audioBuffer, &isCopy);
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audioBufferFrames = mEnv->GetArrayLength((jbyteArray)audioBuffer);
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}
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if (audioBufferStereo) {
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audioBufferFrames /= 2;
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}
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return audioBufferFrames;
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}
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extern "C" void * Android_JNI_GetAudioBuffer()
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{
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return audioBufferPinned;
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}
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extern "C" void Android_JNI_WriteAudioBuffer()
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{
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if (audioBuffer16Bit) {
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mAudioEnv->ReleaseShortArrayElements((jshortArray)audioBuffer, (jshort *)audioBufferPinned, JNI_COMMIT);
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mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteShortBuffer, (jshortArray)audioBuffer);
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} else {
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mAudioEnv->ReleaseByteArrayElements((jbyteArray)audioBuffer, (jbyte *)audioBufferPinned, JNI_COMMIT);
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mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteByteBuffer, (jbyteArray)audioBuffer);
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}
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/* JNI_COMMIT means the changes are committed to the VM but the buffer remains pinned */
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}
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extern "C" void Android_JNI_CloseAudioDevice()
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{
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mEnv->CallStaticVoidMethod(mActivityClass, midAudioQuit);
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if (audioBuffer) {
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mEnv->DeleteGlobalRef(audioBuffer);
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audioBuffer = NULL;
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audioBufferPinned = NULL;
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}
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}
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// Test for an exception and call SDL_SetError with its detail if one occurs
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static bool Android_JNI_ExceptionOccurred()
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{
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jthrowable exception = mEnv->ExceptionOccurred();
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if (exception != NULL) {
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jmethodID mid;
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// Until this happens most JNI operations have undefined behaviour
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mEnv->ExceptionClear();
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jclass exceptionClass = mEnv->GetObjectClass(exception);
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jclass classClass = mEnv->FindClass("java/lang/Class");
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mid = mEnv->GetMethodID(classClass, "getName", "()Ljava/lang/String;");
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jstring exceptionName = (jstring)mEnv->CallObjectMethod(exceptionClass, mid);
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const char* exceptionNameUTF8 = mEnv->GetStringUTFChars(exceptionName, 0);
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mid = mEnv->GetMethodID(exceptionClass, "getMessage", "()Ljava/lang/String;");
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jstring exceptionMessage = (jstring)mEnv->CallObjectMethod(exceptionClass, mid);
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if (exceptionMessage != NULL) {
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const char* exceptionMessageUTF8 = mEnv->GetStringUTFChars(
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exceptionMessage, 0);
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SDL_SetError("%s: %s", exceptionNameUTF8, exceptionMessageUTF8);
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mEnv->ReleaseStringUTFChars(exceptionMessage, exceptionMessageUTF8);
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mEnv->DeleteLocalRef(exceptionMessage);
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} else {
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SDL_SetError("%s", exceptionNameUTF8);
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}
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mEnv->ReleaseStringUTFChars(exceptionName, exceptionNameUTF8);
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mEnv->DeleteLocalRef(exceptionName);
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mEnv->DeleteLocalRef(classClass);
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mEnv->DeleteLocalRef(exceptionClass);
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mEnv->DeleteLocalRef(exception);
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return true;
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}
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return false;
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}
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static int Android_JNI_FileOpen(SDL_RWops* ctx)
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{
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int result = 0;
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jmethodID mid;
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jobject context;
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jobject assetManager;
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jobject inputStream;
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jclass channels;
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jobject readableByteChannel;
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jstring fileNameJString;
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bool allocatedLocalFrame = false;
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if (mEnv->PushLocalFrame(16) < 0) {
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SDL_SetError("Failed to allocate enough JVM local references");
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goto failure;
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} else {
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allocatedLocalFrame = true;
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}
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fileNameJString = (jstring)ctx->hidden.androidio.fileName;
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// context = SDLActivity.getContext();
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mid = mEnv->GetStaticMethodID(mActivityClass,
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"getContext","()Landroid/content/Context;");
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context = mEnv->CallStaticObjectMethod(mActivityClass, mid);
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// assetManager = context.getAssets();
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mid = mEnv->GetMethodID(mEnv->GetObjectClass(context),
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"getAssets", "()Landroid/content/res/AssetManager;");
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assetManager = mEnv->CallObjectMethod(context, mid);
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// inputStream = assetManager.open(<filename>);
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mid = mEnv->GetMethodID(mEnv->GetObjectClass(assetManager),
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"open", "(Ljava/lang/String;)Ljava/io/InputStream;");
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inputStream = mEnv->CallObjectMethod(assetManager, mid, fileNameJString);
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if (Android_JNI_ExceptionOccurred()) {
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goto failure;
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}
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ctx->hidden.androidio.inputStream = inputStream;
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ctx->hidden.androidio.inputStreamRef = mEnv->NewGlobalRef(inputStream);
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// Store .skip id for seeking purposes
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mid = mEnv->GetMethodID(mEnv->GetObjectClass(inputStream),
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"skip", "(J)J");
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ctx->hidden.androidio.skipMethod = mid;
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// Despite all the visible documentation on [Asset]InputStream claiming
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// that the .available() method is not guaranteed to return the entire file
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// size, comments in <sdk>/samples/<ver>/ApiDemos/src/com/example/ ...
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// android/apis/content/ReadAsset.java imply that Android's
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// AssetInputStream.available() /will/ always return the total file size
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// size = inputStream.available();
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mid = mEnv->GetMethodID(mEnv->GetObjectClass(inputStream),
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"available", "()I");
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ctx->hidden.androidio.size = mEnv->CallIntMethod(inputStream, mid);
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if (Android_JNI_ExceptionOccurred()) {
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goto failure;
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}
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// readableByteChannel = Channels.newChannel(inputStream);
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channels = mEnv->FindClass("java/nio/channels/Channels");
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mid = mEnv->GetStaticMethodID(channels,
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"newChannel",
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"(Ljava/io/InputStream;)Ljava/nio/channels/ReadableByteChannel;");
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readableByteChannel = mEnv->CallStaticObjectMethod(
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channels, mid, inputStream);
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if (Android_JNI_ExceptionOccurred()) {
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goto failure;
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}
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ctx->hidden.androidio.readableByteChannel = readableByteChannel;
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ctx->hidden.androidio.readableByteChannelRef =
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mEnv->NewGlobalRef(readableByteChannel);
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// Store .read id for reading purposes
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mid = mEnv->GetMethodID(mEnv->GetObjectClass(readableByteChannel),
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"read", "(Ljava/nio/ByteBuffer;)I");
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ctx->hidden.androidio.readMethod = mid;
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ctx->hidden.androidio.position = 0;
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if (false) {
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failure:
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result = -1;
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mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.fileNameRef);
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if(ctx->hidden.androidio.inputStreamRef != NULL) {
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mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.inputStreamRef);
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}
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}
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if (allocatedLocalFrame) {
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mEnv->PopLocalFrame(NULL);
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}
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return result;
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}
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extern "C" int Android_JNI_FileOpen(SDL_RWops* ctx,
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const char* fileName, const char*)
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{
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if (!ctx) {
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return -1;
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}
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jstring fileNameJString = mEnv->NewStringUTF(fileName);
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ctx->hidden.androidio.fileName = fileNameJString;
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ctx->hidden.androidio.fileNameRef = mEnv->NewGlobalRef(fileNameJString);
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ctx->hidden.androidio.inputStreamRef = NULL;
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mEnv->DeleteLocalRef(fileNameJString);
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return Android_JNI_FileOpen(ctx);
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}
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extern "C" size_t Android_JNI_FileRead(SDL_RWops* ctx, void* buffer,
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size_t size, size_t maxnum)
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{
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int bytesRemaining = size * maxnum;
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int bytesRead = 0;
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jobject readableByteChannel = (jobject)ctx->hidden.androidio.readableByteChannel;
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jmethodID readMethod = (jmethodID)ctx->hidden.androidio.readMethod;
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jobject byteBuffer = mEnv->NewDirectByteBuffer(buffer, bytesRemaining);
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while (bytesRemaining > 0) {
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// result = readableByteChannel.read(...);
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int result = mEnv->CallIntMethod(readableByteChannel, readMethod, byteBuffer);
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if (Android_JNI_ExceptionOccurred()) {
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mEnv->DeleteLocalRef(byteBuffer);
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return 0;
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}
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if (result < 0) {
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break;
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}
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bytesRemaining -= result;
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bytesRead += result;
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ctx->hidden.androidio.position += result;
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}
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mEnv->DeleteLocalRef(byteBuffer);
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return bytesRead / size;
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}
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extern "C" size_t Android_JNI_FileWrite(SDL_RWops* ctx, const void* buffer,
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size_t size, size_t num)
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{
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SDL_SetError("Cannot write to Android package filesystem");
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return 0;
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}
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static int Android_JNI_FileClose(SDL_RWops* ctx, bool release)
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{
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int result = 0;
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if (ctx) {
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if (release) {
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mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.fileNameRef);
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}
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jobject inputStream = (jobject)ctx->hidden.androidio.inputStream;
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// inputStream.close();
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jmethodID mid = mEnv->GetMethodID(mEnv->GetObjectClass(inputStream),
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"close", "()V");
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mEnv->CallVoidMethod(inputStream, mid);
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mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.inputStreamRef);
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mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.readableByteChannelRef);
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if (Android_JNI_ExceptionOccurred()) {
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result = -1;
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}
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if (release) {
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SDL_FreeRW(ctx);
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}
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}
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return result;
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}
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extern "C" long Android_JNI_FileSeek(SDL_RWops* ctx, long offset, int whence)
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{
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long newPosition;
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switch (whence) {
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case RW_SEEK_SET:
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newPosition = offset;
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break;
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case RW_SEEK_CUR:
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newPosition = ctx->hidden.androidio.position + offset;
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break;
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case RW_SEEK_END:
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newPosition = ctx->hidden.androidio.size + offset;
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break;
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default:
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SDL_SetError("Unknown value for 'whence'");
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return -1;
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}
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if (newPosition < 0) {
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newPosition = 0;
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}
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if (newPosition > ctx->hidden.androidio.size) {
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newPosition = ctx->hidden.androidio.size;
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}
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long movement = newPosition - ctx->hidden.androidio.position;
|
|
jobject inputStream = (jobject)ctx->hidden.androidio.inputStream;
|
|
jmethodID skipMethod = (jmethodID)ctx->hidden.androidio.skipMethod;
|
|
|
|
if (movement > 0) {
|
|
// The easy case where we're seeking forwards
|
|
while (movement > 0) {
|
|
// inputStream.skip(...);
|
|
movement -= mEnv->CallLongMethod(inputStream, skipMethod, movement);
|
|
if (Android_JNI_ExceptionOccurred()) {
|
|
return -1;
|
|
}
|
|
}
|
|
} else if (movement < 0) {
|
|
// We can't seek backwards so we have to reopen the file and seek
|
|
// forwards which obviously isn't very efficient
|
|
Android_JNI_FileClose(ctx, false);
|
|
Android_JNI_FileOpen(ctx);
|
|
Android_JNI_FileSeek(ctx, newPosition, RW_SEEK_SET);
|
|
}
|
|
|
|
ctx->hidden.androidio.position = newPosition;
|
|
|
|
return ctx->hidden.androidio.position;
|
|
}
|
|
|
|
extern "C" int Android_JNI_FileClose(SDL_RWops* ctx)
|
|
{
|
|
return Android_JNI_FileClose(ctx, true);
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|