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#include "jogamp_opengl_GLContextImpl.h"
#include "JoglCommon.h"
#include <assert.h>
#include <KHR/khrplatform.h>
static const char * const ClazzNameRuntimeException = "java/lang/RuntimeException";
static jclass runtimeExceptionClz=NULL;
static JavaVM *_jvmHandle = NULL;
static int _jvmVersion = 0;
void JoglCommon_init(JNIEnv *env) {
if(NULL==runtimeExceptionClz) {
jclass c = (*env)->FindClass(env, ClazzNameRuntimeException);
if(NULL==c) {
JoglCommon_FatalError(env, "JOGL: can't find %s", ClazzNameRuntimeException);
}
runtimeExceptionClz = (jclass)(*env)->NewGlobalRef(env, c);
(*env)->DeleteLocalRef(env, c);
if(NULL==runtimeExceptionClz) {
JoglCommon_FatalError(env, "JOGL: can't use %s", ClazzNameRuntimeException);
}
}
if(0 != (*env)->GetJavaVM(env, &_jvmHandle)) {
JoglCommon_FatalError(env, "JOGL: can't fetch JavaVM handle");
} else {
_jvmVersion = (*env)->GetVersion(env);
}
}
void JoglCommon_FatalError(JNIEnv *env, const char* msg, ...)
{
char buffer[512];
va_list ap;
int shallBeDetached = 0;
if(NULL == env) {
env = JoglCommon_GetJNIEnv (&shallBeDetached);
}
va_start(ap, msg);
vsnprintf(buffer, sizeof(buffer), msg, ap);
va_end(ap);
fprintf(stderr, "%s\n", buffer);
if(NULL != env) {
(*env)->FatalError(env, buffer);
JoglCommon_ReleaseJNIEnv (shallBeDetached);
}
}
void JoglCommon_throwNewRuntimeException(JNIEnv *env, const char* msg, ...)
{
char buffer[512];
va_list ap;
int shallBeDetached = 0;
if(NULL == env) {
env = JoglCommon_GetJNIEnv (&shallBeDetached);
}
va_start(ap, msg);
vsnprintf(buffer, sizeof(buffer), msg, ap);
va_end(ap);
if(NULL != env) {
(*env)->ThrowNew(env, runtimeExceptionClz, buffer);
JoglCommon_ReleaseJNIEnv (shallBeDetached);
}
}
JavaVM *JoglCommon_GetJVMHandle() {
return _jvmHandle;
}
int JoglCommon_GetJVMVersion() {
return _jvmVersion;
}
jchar* JoglCommon_GetNullTerminatedStringChars(JNIEnv* env, jstring str)
{
jchar* strChars = NULL;
strChars = calloc((*env)->GetStringLength(env, str) + 1, sizeof(jchar));
if (strChars != NULL) {
(*env)->GetStringRegion(env, str, 0, (*env)->GetStringLength(env, str), strChars);
}
return strChars;
}
JNIEnv* JoglCommon_GetJNIEnv (int * shallBeDetached)
{
JNIEnv* curEnv = NULL;
JNIEnv* newEnv = NULL;
int envRes;
if(NULL == _jvmHandle) {
fprintf(stderr, "JOGL: No JavaVM handle registered, call JoglCommon_init(..) 1st");
return NULL;
}
// retrieve this thread's JNIEnv curEnv - or detect it's detached
envRes = (*_jvmHandle)->GetEnv(_jvmHandle, (void **) &curEnv, _jvmVersion) ;
if( JNI_EDETACHED == envRes ) {
// detached thread - attach to JVM
if( JNI_OK != ( envRes = (*_jvmHandle)->AttachCurrentThread(_jvmHandle, (void**) &newEnv, NULL) ) ) {
fprintf(stderr, "JNIEnv: can't attach thread: %d\n", envRes);
return NULL;
}
curEnv = newEnv;
} else if( JNI_OK != envRes ) {
// oops ..
fprintf(stderr, "can't GetEnv: %d\n", envRes);
return NULL;
}
if (curEnv==NULL) {
fprintf(stderr, "env is NULL\n");
return NULL;
}
*shallBeDetached = NULL != newEnv;
return curEnv;
}
void JoglCommon_ReleaseJNIEnv (int shallBeDetached) {
if(NULL == _jvmHandle) {
fprintf(stderr, "JOGL: No JavaVM handle registered, call JoglCommon_init(..) 1st");
}
if(shallBeDetached) {
(*_jvmHandle)->DetachCurrentThread(_jvmHandle);
}
}
/*
* Class: jogamp_opengl_GLContextImpl
* Method: glGetStringInt
* Signature: (IJ)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL
Java_jogamp_opengl_GLContextImpl_glGetStringInt(JNIEnv *env, jclass _unused, jint name, jlong procAddress) {
typedef const khronos_uint8_t * (KHRONOS_APIENTRY*_local_PFNGLGETSTRINGPROC)(unsigned int name);
_local_PFNGLGETSTRINGPROC ptr_glGetString;
const khronos_uint8_t * _res;
ptr_glGetString = (_local_PFNGLGETSTRINGPROC) (intptr_t) procAddress;
assert(ptr_glGetString != NULL);
_res = (* ptr_glGetString) ((unsigned int) name);
if (NULL == _res) return NULL;
return (*env)->NewStringUTF(env, _res);
}
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