JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_LinuxContextImplementation_nCreate
(JNIEnv *env , jclass clazz, jobject peer_handle, jobject attribs, jobject shared_context_handle) {
jobject context_handle = newJavaManagedByteBuffer(env, sizeof(X11Context));
if (context_handle == NULL) {
throwException(env, "Could not allocate handle buffer");
return NULL;
}
X11PeerInfo *peer_info = (*env)->GetDirectBufferAddress(env, peer_handle);
X11Context *context_info = (*env)->GetDirectBufferAddress(env, context_handle);
GLXExtensions extension_flags;
if (!extgl_InitGLX(peer_info->display, peer_info->screen, &extension_flags)) {
throwException(env, "Could not initialize GLX");
return NULL;
}
GLXContext shared_context = NULL;
if (shared_context_handle != NULL) {
X11Context *shared_context_info = (*env)->GetDirectBufferAddress(env, shared_context_handle);
shared_context = shared_context_info->context;
}
if (peer_info->glx13) {
createContextGLX13(env, peer_info, context_info, extension_flags.GLX_ARB_create_context ? attribs : NULL, shared_context);
} else {
createContextGLX(env, peer_info, context_info, shared_context);
}
context_info->extension_flags = extension_flags;
return context_handle;
}
JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_WindowsPeerInfo_createHandle(JNIEnv *env, jclass clazz) {
return newJavaManagedByteBuffer(env, sizeof(WindowsPeerInfo));
}
JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_WindowsContextImplementation_nCreate
(JNIEnv *env, jclass clazz, jobject peer_info_handle, jobject attribs, jobject shared_context_handle) {
WindowsPeerInfo *peer_info;
WindowsContext *shared_context_info;
WindowsContext *context_info;
HGLRC context;
HGLRC shared_context = NULL;
// -- We need to create a temporary context to detect the presence of WGL_ARB_create_context
HDC saved_current_hdc;
HGLRC saved_current_hglrc;
WGLExtensions extensions;
const int *attribList = attribs == NULL ? NULL : ((const int *)(*env)->GetDirectBufferAddress(env, attribs));
jobject context_handle = newJavaManagedByteBuffer(env, sizeof(WindowsContext));
if (context_handle == NULL) {
throwException(env, "Could not create handle buffer");
return NULL;
}
peer_info = (WindowsPeerInfo *)(*env)->GetDirectBufferAddress(env, peer_info_handle);
if (shared_context_handle != NULL) {
shared_context_info = (WindowsContext *)(*env)->GetDirectBufferAddress(env, shared_context_handle);
shared_context = shared_context_info->context;
}
// Create the context
context = wglCreateContext(peer_info->drawable_hdc);
if (context == NULL) {
throwException(env, "Could not create context");
return NULL;
}
// Save the current HDC and HGLRC to avoid disruption
saved_current_hdc = wglGetCurrentDC();
saved_current_hglrc = wglGetCurrentContext();
// Make context current and detect extensions
if (!wglMakeCurrent(peer_info->drawable_hdc, context)) {
throwException(env, "Could not bind dummy context");
return NULL;
}
extgl_InitWGL(&extensions);
peer_info->extensions = extensions;
// Restore previous context
wglMakeCurrent(saved_current_hdc, saved_current_hglrc);
//
if ( extensions.WGL_ARB_create_context ) { // We support WGL_ARB_create_context, use the new context creation routine
// If we have no context to share and no special attributes, we don't have to recreate the context - wglCreateContext is equivalent to wglCreateContextAttribs(hdc,0,NULL).
if ( shared_context != NULL || attribList != NULL ) {
// Delete the oldschool context
wglDeleteContext(context);
// Create a new context using WGL_ARB_create_context
context = (HGLRC)extensions.wglCreateContextAttribsARB(peer_info->drawable_hdc, shared_context, attribList);
if (context == NULL) {
throwException(env, "Could not create context (WGL_ARB_create_context)");
return NULL;
}
}
} else { // We don't support WGL_ARB_create_context, use the old context creation routine
if (shared_context != NULL && !wglShareLists(shared_context, context)) { // Use wglShareLists to share context data
wglDeleteContext(context);
throwException(env, "Could not share contexts");
return NULL;
}
}
context_info = (WindowsContext *)(*env)->GetDirectBufferAddress(env, context_handle);
context_info->context = context;
return context_handle;
}
JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_LinuxKeyboard_allocateComposeStatus(JNIEnv *env, jclass unused) {
return newJavaManagedByteBuffer(env, sizeof(XComposeStatus));
}
JNIEXPORT jobject JNICALL Java_org_lwjgl_opengl_AWTSurfaceLock_createHandle
(JNIEnv *env, jclass clazz) {
return newJavaManagedByteBuffer(env, sizeof(AWTSurfaceLock));
}
static jobject createNativeGammaBuffer(JNIEnv *env) {
return newJavaManagedByteBuffer(env, sizeof(WORD)*3*org_lwjgl_opengl_WindowsDisplay_GAMMA_LENGTH);
}