public static void SetBuffers(this IMTLComputeCommandEncoder table, IMTLBuffer[] buffers, nuint[] offsets, NSRange range)
{
if (buffers == null)
{
throw new ArgumentNullException(nameof(buffers));
}
if (offsets == null)
{
throw new ArgumentNullException(nameof(offsets));
}
var bufferPtrArray = buffers.Length <= 1024 ? stackalloc IntPtr[buffers.Length] : new IntPtr [buffers.Length];
// get all intptr from the array to pass to the lower level call
for (var i = 0; i < buffers.Length; i++)
{
bufferPtrArray [i] = buffers [i].Handle;
}
unsafe
{
fixed(void *buffersPtr = bufferPtrArray)
fixed(void *offsetsPtr = offsets) // can use fixed
{
table.SetBuffers((IntPtr)buffersPtr, (IntPtr)offsetsPtr, range);
}
}
GC.KeepAlive(buffers)
}
public static void SampleCounters(this IMTLComputeCommandEncoder This, IMTLCounterSampleBuffer sampleBuffer, nuint sampleIndex, bool barrier)
{
if (sampleBuffer == null)
{
ObjCRuntime.ThrowHelper.ThrowArgumentNullException(nameof(sampleBuffer));
}
global::ObjCRuntime.Messaging.void_objc_msgSend_IntPtr_UIntPtr_bool(This.Handle, Selector.GetHandle("sampleCountersInBuffer:atSampleIndex:withBarrier:"), sampleBuffer.Handle, (UIntPtr)sampleIndex, barrier);
}
public void TearDown()
{
commandQ?.Dispose();
commandQ = null;
commandBuffer?.Dispose();
commandBuffer = null;
encoder?.Dispose();
encoder = null;
}
public void Compute(IMTLCommandBuffer commandBuffer)
{
IMTLComputeCommandEncoder computeEncoder = commandBuffer.ComputeCommandEncoder;
if (computeEncoder == null)
{
return;
}
computeEncoder.SetComputePipelineState(kernel);
computeEncoder.SetTexture(mpInTexture.MetalTexture, 0);
computeEncoder.SetTexture(outTexture, 1);
computeEncoder.DispatchThreadgroups(localCount, workgroupSize);
computeEncoder.EndEncoding();
}
public void Draw(MTKView view)
{
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// Compute commands
IMTLComputeCommandEncoder computeCommandEncoder = commandBuffer.ComputeCommandEncoder;
computeCommandEncoder.SetComputePipelineState(computePipelineState);
computeCommandEncoder.SetBuffer(tessellationFactorsBuffer, 0, 2);
computeCommandEncoder.DispatchThreadgroups(new MTLSize(1, 1, 1), new MTLSize(1, 1, 1));
computeCommandEncoder.EndEncoding();
// Render commands
// Call the view's completion handler which is required by the view since it will signal its semaphore and set up the next buffer
var drawable = view.CurrentDrawable;
// Obtain a renderPassDescriptor generated from the view's drawable textures
MTLRenderPassDescriptor renderPassDescriptor = view.CurrentRenderPassDescriptor;
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderCommandEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
// Set context state
renderCommandEncoder.SetTriangleFillMode(MTLTriangleFillMode.Lines);
renderCommandEncoder.SetDepthStencilState(depthState);
renderCommandEncoder.SetRenderPipelineState(renderPipelineState);
renderCommandEncoder.SetVertexBuffer(controlPointsBuffer, 0, 0);
renderCommandEncoder.SetTessellationFactorBuffer(tessellationFactorsBuffer, 0, 0);
// Tell the render context we want to draw our primitives
renderCommandEncoder.DrawPatches(3, 0, 1, null, 0, 1, 0);
// We're done encoding commands
renderCommandEncoder.EndEncoding();
// Schedule a present once the framebuffer is complete using the current drawable
commandBuffer.PresentDrawable(drawable);
// Finalize rendering here & push the command buffer to the GPU
commandBuffer.Commit();
}
public void SetUp()
{
device = MTLDevice.SystemDefault;
// some older hardware won't have a default
if (device == null)
{
Assert.Inconclusive("Metal is not supported");
}
commandQ = device.CreateCommandQueue();
if (commandQ == null) // this happens on a simulator
{
Assert.Inconclusive("Could not get the functions library for the device.");
}
commandBuffer = commandQ.CommandBuffer();
if (commandBuffer == null) // happens on sim
{
Assert.Inconclusive("Could not get the command buffer for the device.");
}
encoder = commandBuffer.ComputeCommandEncoder;
}