Hi,
my game runs in 4:3 and I use ResolutionPolicy::SHOW_ALL to have correct aspect ratio but if I do that, I am not able to get touch events on the left and right black border because it is outside of the GLView.
I tried to create a layer as parent called gameLayer and placed my framebuffer sprite centered in it and a camera with a calculated viewport. But my output is a bit distorted.
mGameLayer = LayerColor::create(Color4B(255, 0, 0, 255));
this->addChild(mGameLayer, 0, 0);
auto lWinSize = Director::getInstance()->getWinSizeInPixels();
// create FrameBuffer
auto lFrameBufferSize = Size(320, 240);
auto lFrameBuffer = experimental::FrameBuffer::create(1, lFrameBufferSize.width, lFrameBufferSize.height);
//fbo->setClearColor(Color4F(255, 255, 255, 0));
lFrameBuffer->setClearColor(Color4F(0, 255, 0, 255));
auto lRenderTarget = experimental::RenderTarget::create(lFrameBufferSize.width, lFrameBufferSize.height);
auto lRenderTargetDepthStencil = experimental::RenderTargetDepthStencil::create(lFrameBufferSize.width, lFrameBufferSize.height);
lFrameBuffer->attachRenderTarget(lRenderTarget);
lFrameBuffer->attachDepthStencilTarget(lRenderTargetDepthStencil);
lFrameBuffer->getRenderTarget()->getTexture()->setAliasTexParameters();
// create texture from FrameBuffer
auto lFrameBufferSprite = Sprite::createWithTexture(lFrameBuffer->getRenderTarget()->getTexture());
lFrameBufferSprite->setPosition(lWinSize.width / 2, lWinSize.height / 2);
lFrameBufferSprite->setScale(lWinSize.height / 240.0f); // zoom into to have full height off screen
lFrameBufferSprite->setFlippedY(true);
mGameLayer->addChild(lFrameBufferSprite);
// add sprites
sprite2 = Sprite::create("cut3x.png"); // resolution is 960x720
int fboWidth = lFrameBufferSprite->getTexture()->getContentSizeInPixels().width * 3;
int fboHeight = lFrameBufferSprite->getTexture()->getContentSizeInPixels().height * 3;
sprite2->setPosition(fboWidth / 2, fboHeight / 2);
sprite2->getTexture()->setAliasTexParameters();
// apply shader to FrameBuffer sprite
InitShader(lFrameBufferSprite);
// create camera and set new viewport to zoom in and show picture with maximal height
auto camera = Camera::create();
camera->setCameraFlag(CameraFlag::USER1);
camera->setDepth(-1);
camera->setFrameBufferObject(lFrameBuffer);
float viewPortRectWidthRatio = static_cast<float>(lWinSize.width) / static_cast<float>(960);
float viewPortRectHeightRatio = static_cast<float>(lWinSize.height) / static_cast<float>(720);
float viewPortW = ceilf(viewPortRectWidthRatio * (float)1000.0) / (float)1000.0;
float viewPortH = ceilf(viewPortRectHeightRatio * (float)1000.0) / (float)1000.0;
experimental::Viewport lViewPort = experimental::Viewport(0, 0, viewPortW, viewPortH);
camera->setViewport(lViewPort);
mGameLayer->addChild(camera);
Any advice how I can or should do this`? 
Thank you!
