This is part of the code for a Flutter plugin that uses a Flutter texture to render something with OpenGL
private FlutterVideoPlugin(Registrar registrar, MethodChannel channel) {
this.registrar = registrar;
this.channel = channel;
this.textures = registrar.textures();
}
#Override
public void onMethodCall(MethodCall call, Result notSafeResult) {
final AnyThreadResult result = new AnyThreadResult(notSafeResult);
if (call.method.equals("createVideoRenderer")) {
TextureRegistry.SurfaceTextureEntry entry = textures.createSurfaceTexture();
//do anything with the texture
As you see, it uses a Flutter methodCall.
Is it possible to do the same thing but with FFI in C++? I'd not like to rely on onMethodCall, it's gotta be either FFI or Flutter method calls, because I think that FFI does everything in a different way, something like that.
However, since the Flutter engine and specially the Texture part is written in Java, it looks like I need some java code. The problem is that FFI and java don't mix. It looks like I either have to use onMethodCall for everything in my app, or FFI, but FFI does not seem to have support for getting textures
There is an open issue: Consider exposing plugin APIs for use via FFI
#110353
Discussion on the issue refers specifically to the Texture Registry so I believe the answer is no (for now).
Related
How do I implement a function to load a dll(aka framework) on Mac OS using C++?
void LoadFramework(const char* frameworkPath)
{
//frameworkPath is the absolute path of the framework
}
Edit:
When I google searched for this problem, I mostly ended up with dlopen solution to load the framework. What I am instead looking for is to use CFBundleCreate to load the framework. It seems to me that there are a bunch of methods needed to be called to construct an URL from const char * path. I found the needed code in pieces, and could not write one comprehensive solution.
It typically is just a few lines of straightforward code to open a framework in Mac, something along the lines of :
bundleURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
CFSTR("/System/Library/Frameworks/<your_framework_name.framework>"),
kCFURLPOSIXPathStyle, true);
bundle = CFBundleCreate(kCFAllocatorDefault, bundleURL);
assert(bundle != NULL);
and pretty much everything in that snippet is well documented. I would suggest adding more detail in the question, as to the specifics of what exactly is not working for you.
Why not do this?
using DLL_Namespace;
This should give you access to the DLL.
I am attempting to create a custom object using Cinder C++ on windows with Visual Studio. I am hoping to find a solution that allows you to point to a object with BatchRef object, and which can be used in the same way as any other BatchRef.
I have already tried searching through the official websites tutorials and documentation, and while it does an excellent job of listing all the classes, functions, etc, it does a exceedingly slim job of covering the usage of most of those, with only the return type and arguments listed.
Ideally, we could call the custom shape something like myShape and it could be used in the following manner in my App::draw() override: (with mShader already defined someplace else)
gl::BatchRef bRef;
gl::pushModelMatrix();
bRef = gl::Batch::create( myShape() , mShader );
bRef -> draw();
gl::popModelMatrix();
If the documentation has instructions for this, feel free to point me that way. I was unable to find it, but that does not mean that it does not exist.
I am developing a mobile game using Cocos2D-x engine for android platform and i want to integrate GPGS on it.
I achieved to show leaderboards, but there is a little annoying problem. When leaderboard is visible, if i go background and then come back to app, the gamescene goes to black. I think opengl context being released and doesnt restore again. In my opinion running leaderboard on same activity causes this, the game engine cant understand whats happening there. Whatever, because of this I want to run leaderboard (and also all GPGS things) on a new activity using intent.
Google likes "Providing"
In the reference documents of Google Play Game Services C++ SDK, there is a few unclear/fuzzy explanation about using SetOptionalIntentHandlerForUI method.
"Provide a function that can start a provided UI intent at any point, using startActivityForResult."
What is the mean of "Providing"? What is a provided Intent? How will I use startActivityForResult method? Unfortunately, "using" and "providing methods" are not clear expressions for coding. There is no sample about
using this method in the documents of GPGS for C++. Eventually,
Google's document is so poor and
there is no useful information on the internet. If someone from Google helps me, I will be so happy.
As i understand, I wrote the code like this. But it gives error when starting.
AppActivity.java
public void runGPGSActivity(Intent i) {
startActivityForResult(i,100);
}
AndroidPlatformConfiguration.h (From C++ gpg lib)
typedef std::function<void(jobject)> IntentHandler;
AndroidPlatformConfiguration &SetOptionalIntentHandlerForUI(
IntentHandler intent_handler);
main.cpp (JNI binding, the working code, GPGS runs on same activity )
gpg::AndroidPlatformConfiguration platform_configuration;
platform_configuration.SetActivity(activity);
StateManager::InitServices( ...
main.cpp (JNI binding, GPGS must be run on new activity )
gpg::AndroidPlatformConfiguration platform_configuration;
jclass activityClass = env->FindClass("org/cocos2dx/cpp/AppActivity");
jmethodID jIntentHandlerMethodID = env->GetMethodID(activityClass,"runGPGSActivity","(Landorid/content/Intent;)V");
jobject jIntentHandler = env->NewObject(activityClass, jIntentHandlerMethodID);
gpg::AndroidPlatformConfiguration::IntentHandler mIntentHandler; /*= [](jobject mjIntentHandler){};*/
std::function<void(jobject)> intentHandler = std::bind(mIntentHandler,jIntentHandler);
platform_configuration.SetOptionalIntentHandlerForUI(intentHandler);
platform_configuration.SetActivity(activity);
StateManager::InitServices(
There is no build error, but the application crashes when launching.
03-24 14:12:24.301: A/libc(21352): Fatal signal 6 (SIGABRT) at
0x00005368 (code=-6), thread 21352 (main)
And some links about this issue:
IntentHandler reference
StartActivityForResult reference
/// Thank you in advance. ///
...Yeah I solved the problem, but didn't use IntentHandler method.
I was using this code in my app, to show weekly leaderboard data.
gameServices->Leaderboards().ShowUIBlocking(leaderboardId,gpg::LeaderboardTimeSpan::WEEKLY);
But return value is not void, it is UIStatus (whatever it is)
I've reverted back to this code, app is not going to black screen now. This method returns void, I think I have to catch some callbacks when using ShowUIBlocking method, with that UIStatus thing.
gameServices->Leaderboards().ShowUI(leaderboardId);
But now, I can't benefit from timespan feature of leaderboards.
I am going to research how it can be used. There is no problem for now. But, documentation of SetOptionalIntentHandlerForUI must be written more explicit, for programmers who want to use it.
I was working with porting the sample from the link below to a Windows 8 Metro styled app
http://aws.amazon.com/code/Product-Advertising-API/2480
Looks like many features from the web model are removed (or moved) in WinRT:
HttpUtility.UrlEncode
HttpUtility.UrlDecode
HMAC / HMACSHA256
to name a few. Are there alternatives to these on WInRT? I looked online and there's very little insight.
Theres source code for URLDecode here, and looks like Uri.EscapeDataString can be used for Encode.
http://www.koders.com/csharp/fid1A50096D8FA38302680B0EEDAC5B1CE1AEA855D0.aspx?s=%22Lawrence+Pit%22
copy the source code over, change the GetChars function to this
static char [] GetChars (MemoryStream b, Encoding e)
{
return e.GetChars (b.ToArray(), 0, (int) b.Length);
}
I had to use the code snippet from here to properly hash encrypt the string
http://channel9.msdn.com/Forums/TechOff/Porting-to-WinRT/4df7586e1ef5400682eda00f0143b610
Use methods from the WebUtility class instead:
System.Net.WebUtility.UrlEncode(string);
System.Net.WebUtility.UrlDecode(string);
I'm looking for a simple example code for C++\IronPython integration, i.e. embedding python code inside a C++, or better yet, Visual C++ program.
The example code should include: how to share objects between the languages, how to call functions\methods back and forth etc...
Also, an explicit setup procedure would help too. (How to include the Python runtime dll in Visual Studio etc...)
I've found a nice example for C#\IronPython here, but couldn't find C++\IronPython example code.
UPDATE - I've written a more generic example (plus a link to a zip file containing the entire VS2008 project) as entry on my blog here.
Sorry, I am so late to the game, but here is how I have integrated IronPython into a C++/cli app in Visual Studio 2008 - .net 3.5. (actually mixed mode app with C/C++)
I write add-ons for a map making applicaiton written in Assembly. The API is exposed so that C/C++ add-ons can be written. I mix C/C++ with C++/cli. Some of the elements from this example are from the API (such as XPCALL and CmdEnd() - please just ignore them)
///////////////////////////////////////////////////////////////////////
void XPCALL PythonCmd2(int Result, int Result1, int Result2)
{
if(Result==X_OK)
{
try
{
String^ filename = gcnew String(txtFileName);
String^ path = Assembly::GetExecutingAssembly()->Location;
ScriptEngine^ engine = Python::CreateEngine();
ScriptScope^ scope = engine->CreateScope();
ScriptSource^ source = engine->CreateScriptSourceFromFile(String::Concat(Path::GetDirectoryName(path), "\\scripts\\", filename + ".py"));
scope->SetVariable("DrawingList", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingList::typeid));
scope->SetVariable("DrawingElement", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingElement::typeid));
scope->SetVariable("DrawingPath", DynamicHelpers::GetPythonTypeFromType(AddIn::DrawingPath::typeid));
scope->SetVariable("Node", DynamicHelpers::GetPythonTypeFromType(AddIn::Node::typeid));
source->Execute(scope);
}
catch(Exception ^e)
{
Console::WriteLine(e->ToString());
CmdEnd();
}
}
else
{
CmdEnd();
}
}
///////////////////////////////////////////////////////////////////////////////
As you can see, I expose to IronPython some objects (DrawingList, DrawingElement, DrawingPath & Node). These objects are C++/cli objects that I created to expose "things" to IronPython.
When the C++/cli source->Execute(scope) line is called, the only python line
to run is the DrawingList.RequestData.
RequestData takes a delegate and a data type.
When the C++/cli code is done, it calls the delegate pointing to the
function "diamond"
In the function diamond it retrieves the requested data with the call to
DrawingList.RequestedValue() The call to DrawingList.AddElement(dp) adds the
new element to the Applications visual Database.
And lastly the call to DrawingList.EndCommand() tells the FastCAD engine to
clean up and end the running of the plugin.
import clr
def diamond(Result1, Result2, Result3):
if(Result1 == 0):
dp = DrawingPath()
dp.drawingStuff.EntityColor = 2
dp.drawingStuff.SecondEntityColor = 2
n = DrawingList.RequestedValue()
dp.Nodes.Add(Node(n.X-50,n.Y+25))
dp.Nodes.Add(Node(n.X-25,n.Y+50))
dp.Nodes.Add(Node(n.X+25,n.Y+50))
dp.Nodes.Add(Node(n.X+50,n.Y+25))
dp.Nodes.Add(Node(n.X,n.Y-40))
DrawingList.AddElement(dp)
DrawingList.EndCommand()
DrawingList.RequestData(diamond, DrawingList.RequestType.PointType)
I hope this is what you were looking for.
If you don't need .NET functionality, you could rely on embedding Python instead of IronPython. See Python's documentation on Embedding Python in Another Application for more info and an example. If you don't mind being dependent on BOOST, you could try out its Python integration library.