protected virtual void DestroyFrameBuffer()
{
AssertValid();
AssertContext();
EAGLContext oldContext = EAGLContext.CurrentContext;
if (!GraphicsContext.IsCurrent)
{
MakeCurrent();
}
DeleteBuffers();
if (oldContext != EAGLContext)
{
EAGLContext.SetCurrentContext(oldContext);
}
else
{
EAGLContext.SetCurrentContext(null);
}
GraphicsContext.Dispose();
GraphicsContext = null;
gl = null;
}
protected virtual void CreateFrameBuffer()
{
AssertValid();
if (LayerColorFormat == null)
{
throw new InvalidOperationException("Set the LayerColorFormat property to an EAGLColorFormat value before calling Run().");
}
CAEAGLLayer eaglLayer = (CAEAGLLayer)Layer;
eaglLayer.DrawableProperties = NSDictionary.FromObjectsAndKeys(
new NSObject [] { NSNumber.FromBoolean(LayerRetainsBacking), LayerColorFormat },
new NSObject [] { EAGLDrawableProperty.RetainedBacking, EAGLDrawableProperty.ColorFormat }
);
ConfigureLayer(eaglLayer);
GraphicsContext = Utilities.CreateGraphicsContext(ContextRenderingApi);
gl = GLCalls.GetGLCalls(ContextRenderingApi);
gl.GenFramebuffers(1, ref framebuffer);
gl.BindFramebuffer(All.FramebufferOes, framebuffer);
gl.GenRenderbuffers(1, ref renderbuffer);
gl.BindRenderbuffer(All.RenderbufferOes, renderbuffer);
if (!EAGLContext.RenderBufferStorage((uint)All.RenderbufferOes, eaglLayer))
{
throw new InvalidOperationException("Error with EAGLContext.RenderBufferStorage!");
}
gl.FramebufferRenderbuffer(All.FramebufferOes, All.ColorAttachment0Oes, All.RenderbufferOes, renderbuffer);
Size newSize = new Size(
(int)Math.Round(eaglLayer.Bounds.Size.Width),
(int)Math.Round(eaglLayer.Bounds.Size.Height));
Size = newSize;
gl.Viewport(0, 0, newSize.Width, newSize.Height);
gl.Scissor(0, 0, newSize.Width, newSize.Height);
frameBufferWindow = new WeakReference(Window);
frameBufferLayer = new WeakReference(Layer);
}