public void Configure (ImageView renderView)
{
renderView.DepthPixelFormat = depthPixelFormat;
renderView.StencilPixelFormat = stencilPixelFormat;
renderView.SampleCount = sampleCount;
// we need to set the framebuffer only property of the layer to NO so we
// can perform compute on the drawable's texture
var metalLayer = (CAMetalLayer)renderView.Layer;
metalLayer.FramebufferOnly = false;
if (!PreparePipelineState ())
throw new ApplicationException ("ERROR: Failed creating a depth stencil state descriptor!");
if (!PrepareTexturedQuad ("Default", "jpg"))
throw new ApplicationException ("ERROR: Failed creating a textured quad!");
if (!PrepareDepthStencilState ())
throw new ApplicationException ("ERROR: Failed creating a depth stencil state!");
if (!PrepareTransformBuffer ())
throw new ApplicationException ("ERROR: Failed creating a transform buffer!");
// Default orientation is unknown
mnOrientation = UIInterfaceOrientation.Unknown;
// Create linear transformation matrices
PrepareTransforms ();
}
public void Reshape (ImageView view)
{
// To correctly compute the aspect ration determine the device
// interface orientation.
UIInterfaceOrientation orientation = UIApplication.SharedApplication.StatusBarOrientation;
// Update the quad and linear _transformation matrices, if and
// only if, the device orientation is changed.
if (mnOrientation == orientation)
return;
float angleInDegrees = GetActualAngle (orientation, view.Layer.Bounds);
CreateMatrix (angleInDegrees);
UpdateBuffer ();
}
public void Render (ImageView view)
{
inflightSemaphore.WaitOne ();
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer ();
// compute image processing on the (same) drawable texture
ICAMetalDrawable drawable = view.GetNextDrawable ();
// create a render command encoder so we can render into something
MTLRenderPassDescriptor renderPassDescriptor = view.GetRenderPassDescriptor (drawable);
if (renderPassDescriptor == null) {
inflightSemaphore.Release ();
return;
}
// Get a render encoder
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder (renderPassDescriptor);
// render textured quad
Encode (renderEncoder);
commandBuffer.AddCompletedHandler ((IMTLCommandBuffer buffer) => {
inflightSemaphore.Release ();
drawable.Dispose ();
});
commandBuffer.PresentDrawable (drawable);
commandBuffer.Commit ();
}