bool CreateFrameBuffer ()
{
bool success = true;
GL.Disable (EnableCap.DepthTest);
GL.GenFramebuffers (1, out FrameBuffer);
GL.BindFramebuffer (FramebufferTarget.Framebuffer, FrameBuffer);
GL.GenRenderbuffers (1, out ColorBuffer);
GL.BindRenderbuffer (RenderbufferTarget.Renderbuffer, ColorBuffer);
Context.RenderBufferStorage ((uint)All.Renderbuffer, (CAEAGLLayer)Layer);
GL.GetRenderbufferParameter (RenderbufferTarget.Renderbuffer, RenderbufferParameterName.RenderbufferWidth, out renderBufferWidth);
GL.GetRenderbufferParameter (RenderbufferTarget.Renderbuffer, RenderbufferParameterName.RenderbufferHeight, out renderBufferHeight);
GL.FramebufferRenderbuffer (FramebufferTarget.Framebuffer, FramebufferSlot.ColorAttachment0, RenderbufferTarget.Renderbuffer, ColorBuffer);
if (GL.CheckFramebufferStatus (FramebufferTarget.Framebuffer) != FramebufferErrorCode.FramebufferComplete){
Console.WriteLine ("Failure with framebuffer generation");
success = false;
}
// Create a new CVOpenGLESTexture Cache
videoTextureCache = CVOpenGLESTextureCache.FromEAGLContext (Context);
glProgram = CreateProgram ();
if (glProgram == 0)
success = false;
return success;
}
public void SetupOffScreenRenderContext()
{
//-- Create CVOpenGLESTextureCacheRef for optimal CVPixelBufferRef to GLES texture conversion.
if (VideoTextureCache != null) {
VideoTextureCache.Dispose ();
VideoTextureCache = null;
}
VideoTextureCache = CVOpenGLESTextureCache.FromEAGLContext (CurrentContext);
GL.Disable (EnableCap.DepthTest);
GL.GenFramebuffers (1, out OffscreenBufferHandle);
GL.BindFramebuffer (FramebufferTarget.Framebuffer, OffscreenBufferHandle);
}
void SetupAVCapture (NSString sessionPreset)
{
if ((videoTextureCache = CVOpenGLESTextureCache.FromEAGLContext (context)) == null){
Console.WriteLine ("Could not create the CoreVideo TextureCache");
return;
}
session = new AVCaptureSession ();
session.BeginConfiguration ();
// Preset size
session.SessionPreset = sessionPreset;
// Input device
var videoDevice = AVCaptureDevice.DefaultDeviceWithMediaType (AVMediaType.Video);
if (videoDevice == null){
Console.WriteLine ("No video device");
return;
}
NSError err;
var input = new AVCaptureDeviceInput (videoDevice, out err);
if (err != null){
Console.WriteLine ("Error creating video capture device");
return;
}
session.AddInput (input);
// Create the output device
var dataOutput = new AVCaptureVideoDataOutput () {
AlwaysDiscardsLateVideoFrames = true,
// YUV 420, use "BiPlanar" to split the Y and UV planes in two separate blocks of
// memory, then we can index 0 to get the Y and 1 for the UV planes in the frame decoding
VideoSettings = new AVVideoSettings (CVPixelFormatType.CV420YpCbCr8BiPlanarFullRange)
};
dataOutputDelegate = new DataOutputDelegate (this);
//
// This dispatches the video frames into the main thread, because the OpenGL
// code is accessing the data synchronously.
//
dataOutput.SetSampleBufferDelegateAndQueue (dataOutputDelegate, DispatchQueue.MainQueue);
session.AddOutput (dataOutput);
session.CommitConfiguration ();
session.StartRunning ();
}
