public void Draw(MTKView view)
{
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// 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;
// If we have a valid drawable, begin the commands to render into it
if (renderPassDescriptor != null)
{
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
// Set context state
renderEncoder.SetDepthStencilState(depthState);
renderEncoder.SetRenderPipelineState(pipelineState);
renderEncoder.SetVertexBuffer(vertexBuffer, 0, 0);
// Tell the render context we want to draw our primitives
renderEncoder.DrawIndexedPrimitives(MTLPrimitiveType.Triangle, (nuint)indexData.Length, MTLIndexType.UInt16, indexBuffer, 0);
// We're done encoding commands
renderEncoder.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 Render(GameView view)
{
inflightSemaphore.WaitOne();
PrepareToDraw();
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
ICAMetalDrawable drawable = view.GetNextDrawable();
MTLRenderPassDescriptor renderPassDescriptor = view.GetRenderPassDescriptor(drawable);
if (renderPassDescriptor == null)
{
Console.WriteLine("ERROR: Failed to get render pass descriptor from view!");
}
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
renderEncoder.SetDepthStencilState(depthState);
RenderBox(renderEncoder, view, 0, "Box1");
RenderBox(renderEncoder, view, (nuint)Marshal.SizeOf <Uniforms> (), "Box2");
renderEncoder.EndEncoding();
commandBuffer.AddCompletedHandler((IMTLCommandBuffer buffer) => {
drawable.Dispose();
inflightSemaphore.Release();
});
commandBuffer.PresentDrawable(drawable);
commandBuffer.Commit();
constantDataBufferIndex = (constantDataBufferIndex + 1) % max_inflight_buffers;
}
/// <summary>
/// Encode a MPSCnnKernel into a command Buffer. The operation shall proceed out-of-place.
/// We calculate the appropriate offset as per how TensorFlow calculates its padding using input image size and stride here.
/// This [Link](https://github.com/tensorflow/tensorflow/blob/master/tensorflow/python/ops/nn.py) has an explanation in header comments how tensorFlow pads its convolution input images.
/// </summary>
/// <param name="commandBuffer">A valid MTLCommandBuffer to receive the encoded filter</param>
/// <param name="sourceImage">A valid MPSImage object containing the source image.</param>
/// <param name="destinationImage">A valid MPSImage to be overwritten by result image. destinationImage may not alias sourceImage</param>
public override void EncodeToCommandBuffer(IMTLCommandBuffer commandBuffer, MPSImage sourceImage, MPSImage destinationImage)
{
// select offset according to padding being used or not
if (padding)
{
var pad_along_height = ((destinationImage.Height - 1) * StrideInPixelsY + KernelHeight - sourceImage.Height);
var pad_along_width = ((destinationImage.Width - 1) * StrideInPixelsX + KernelWidth - sourceImage.Width);
var pad_top = pad_along_height / 2;
var pad_left = pad_along_width / 2;
Offset = new MPSOffset {
X = (nint)(KernelWidth / 2 - pad_left),
Y = (nint)(KernelHeight / 2 - pad_top),
Z = 0
};
}
else
{
Offset = new MPSOffset {
X = (nint)(KernelWidth / 2),
Y = (nint)(KernelHeight / 2),
Z = 0
};
}
base.EncodeToCommandBuffer(commandBuffer, sourceImage, destinationImage);
}
public unsafe void ImportData(IMTLCommandBuffer cmdBuf, IMTLBuffer buffer, MPSDataType sourceDataType, nuint offset, nint[] rowStrides)
{
fixed(nint *p = rowStrides)
{
ImportData(cmdBuf, buffer, sourceDataType, offset, (IntPtr)p);
}
}
public void Render(ImageView view)
{
inflightSemaphore.WaitOne();
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// compute image processing on the (same) drawable texture
Compute(commandBuffer);
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();
}
public void TearDown()
{
commandQ?.Dispose();
commandQ = null;
commandBuffer?.Dispose();
commandBuffer = null;
encoder?.Dispose();
encoder = null;
}
public void Draw(MTKView view)
{
// Update
var time = clock.ElapsedMilliseconds / 1000.0f;
var viewProj = Matrix4.Mult(this.view, this.proj);
var worldViewProj = Matrix4.CreateRotationX(time) * Matrix4.CreateRotationY(time * 2) * Matrix4.CreateRotationZ(time * .7f) * viewProj;
worldViewProj = Matrix4.Transpose(worldViewProj);
int rawsize = Marshal.SizeOf <Matrix4>();
var rawdata = new byte[rawsize];
GCHandle pinnedUniforms = GCHandle.Alloc(worldViewProj, GCHandleType.Pinned);
IntPtr ptr = pinnedUniforms.AddrOfPinnedObject();
Marshal.Copy(ptr, rawdata, 0, rawsize);
pinnedUniforms.Free();
Marshal.Copy(rawdata, 0, constantBuffer.Contents + rawsize, rawsize);
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// 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;
// If we have a valid drawable, begin the commands to render into it
if (renderPassDescriptor != null)
{
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
renderEncoder.SetDepthStencilState(depthState);
// Set context state
renderEncoder.SetRenderPipelineState(pipelineState);
renderEncoder.SetVertexBuffer(vertexBuffer, 0, 0);
renderEncoder.SetVertexBuffer(constantBuffer, (nuint)Marshal.SizeOf <Matrix4>(), 1);
renderEncoder.SetFragmentTexture(this.texture, 0);
renderEncoder.SetFragmentSamplerState(this.sampler, 0);
// Tell the render context we want to draw our primitives
renderEncoder.DrawPrimitives(MTLPrimitiveType.Triangle, 0, (nuint)vertexData.Length);
// We're done encoding commands
renderEncoder.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 Draw(MTKView view)
{
// Update
this.time += this.clock.ElapsedMilliseconds / 1000.0f;
if (this.time > 2)
{
this.time = 0;
clock.Restart();
this.mipmapping++;
if (this.mipmapping >= this.texture.MipmapLevelCount)
{
this.mipmapping = 0;
}
SetConstantBuffer(this.mipmapping, this.constantBuffer);
}
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// 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;
// If we have a valid drawable, begin the commands to render into it
if (renderPassDescriptor != null)
{
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
// Set context state
renderEncoder.SetDepthStencilState(depthState);
renderEncoder.SetRenderPipelineState(pipelineState);
renderEncoder.SetVertexBuffer(vertexBuffer, 0, 0);
renderEncoder.SetFragmentBuffer(constantBuffer, (nuint)sizeof(float), 1);
renderEncoder.SetFragmentTexture(this.texture, 0);
renderEncoder.SetFragmentSamplerState(this.sampler, 0);
// Tell the render context we want to draw our primitives
renderEncoder.DrawPrimitives(MTLPrimitiveType.Triangle, 0, (uint)vertexData.Length);
// We're done encoding commands
renderEncoder.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();
}
void Render()
{
inflightSemaphore.WaitOne();
Update();
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
commandBuffer.Label = "MyCommand";
// 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;
commandBuffer.AddCompletedHandler(buffer =>
{
drawable.Dispose();
inflightSemaphore.Release();
});
// Obtain a renderPassDescriptor generated from the view's drawable textures
MTLRenderPassDescriptor renderPassDescriptor = view.CurrentRenderPassDescriptor;
// If we have a valid drawable, begin the commands to render into it
if (renderPassDescriptor != null)
{
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
renderEncoder.Label = "MyRenderEncoder";
renderEncoder.SetDepthStencilState(depthState);
// Set context state
renderEncoder.PushDebugGroup("DrawCube");
renderEncoder.SetRenderPipelineState(pipelineState);
renderEncoder.SetVertexBuffer(boxMesh.VertexBuffers[0].Buffer, boxMesh.VertexBuffers[0].Offset, 0);
renderEncoder.SetVertexBuffer(dynamicConstantBuffer, (nuint)Marshal.SizeOf <Uniforms>(), 1);
MTKSubmesh submesh = boxMesh.Submeshes[0];
// Tell the render context we want to draw our primitives
renderEncoder.DrawIndexedPrimitives(submesh.PrimitiveType, submesh.IndexCount, submesh.IndexType, submesh.IndexBuffer.Buffer, submesh.IndexBuffer.Offset);
renderEncoder.PopDebugGroup();
// We're done encoding commands
renderEncoder.EndEncoding();
// Schedule a present once the framebuffer is complete using the current drawable
commandBuffer.PresentDrawable(drawable);
}
// The render assumes it can now increment the buffer index and that the previous index won't be touched until we cycle back around to the same index
constantDataBufferIndex = (constantDataBufferIndex + 1) % MaxInflightBuffers;
// Finalize rendering here & push the command buffer to the GPU
commandBuffer.Commit();
}
public void Draw(MTKView view)
{
// Update
var time = clock.ElapsedMilliseconds / 1000.0f;
var viewProj = Matrix4.Mult(this.view, this.proj);
var world = Matrix4.CreateRotationX(time) * Matrix4.CreateRotationY(time * 2) * Matrix4.CreateRotationZ(time * .7f);
var worldViewProj = world * viewProj;
var worldInverse = Matrix4.Invert(world);
param.World = Matrix4.Transpose(world);
param.WorldInverseTranspose = worldInverse;
param.WorldViewProjection = Matrix4.Transpose(worldViewProj);
SetConstantBuffer(this.param, constantBuffer);
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// 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;
// If we have a valid drawable, begin the commands to render into it
if (renderPassDescriptor != null)
{
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
// Set context state
renderEncoder.SetDepthStencilState(depthState);
renderEncoder.SetRenderPipelineState(pipelineState);
renderEncoder.SetVertexBuffer(vertexBuffer, 0, 0);
renderEncoder.SetVertexBuffer(constantBuffer, (nuint)Marshal.SizeOf(this.param), 1);
renderEncoder.SetFragmentBuffer(constantBuffer, (nuint)Marshal.SizeOf(this.param), 1);
renderEncoder.SetFragmentTexture(this.texture, 0);
renderEncoder.SetFragmentSamplerState(this.sampler, 0);
// Tell the render context we want to draw our primitives
renderEncoder.DrawIndexedPrimitives(MTLPrimitiveType.Triangle, (uint)indexDataArray.Length, MTLIndexType.UInt16, indexBuffer, 0);
// We're done encoding commands
renderEncoder.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 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 ();
}
// Using 'NSArray<MPSImage>' instead of `MPSImage[]` because image array 'Handle' matters.
public static void Synchronize(NSArray <MPSImage> imageBatch, IMTLCommandBuffer commandBuffer)
{
if (imageBatch == null)
{
throw new ArgumentNullException(nameof(imageBatch));
}
if (commandBuffer == null)
{
throw new ArgumentNullException(nameof(commandBuffer));
}
MPSImageBatchSynchronize(imageBatch.Handle, commandBuffer.Handle);
}
void Render()
{
inflightSemaphore.WaitOne();
Update();
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
commandBuffer.Label = "MyCommand";
// Obtain a drawable texture for this render pass and set up the renderpass descriptor for the command encoder to render into
ICAMetalDrawable drawable = GetCurrentDrawable();
SetupRenderPassDescriptorForTexture(drawable.Texture);
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
renderEncoder.Label = "MyRenderEncoder";
renderEncoder.SetDepthStencilState(depthState);
// Set context state
renderEncoder.PushDebugGroup("DrawCube");
renderEncoder.SetRenderPipelineState(pipelineState);
renderEncoder.SetVertexBuffer(vertexBuffer, 0, 0);
renderEncoder.SetVertexBuffer(dynamicConstantBuffer, (nuint)(Marshal.SizeOf(typeof(Uniforms)) * constantDataBufferIndex), 1);
// Tell the render context we want to draw our primitives
renderEncoder.DrawPrimitives(MTLPrimitiveType.Triangle, 0, 36, 1);
renderEncoder.PopDebugGroup();
// We're done encoding commands
renderEncoder.EndEncoding();
// Call the view's completion handler which is required by the view since it will signal its semaphore and set up the next buffer
commandBuffer.AddCompletedHandler(buffer =>
{
drawable.Dispose();
inflightSemaphore.Release();
});
// Schedule a present once the framebuffer is complete
commandBuffer.PresentDrawable(drawable);
// Finalize rendering here & push the command buffer to the GPU
commandBuffer.Commit();
// The renderview assumes it can now increment the buffer index and that the previous index won't be touched until we cycle back around to the same index
constantDataBufferIndex = (byte)((constantDataBufferIndex + 1) % max_inflight_buffers);
}
public void Draw(MTKView view)
{
// Update
var time = clock.ElapsedMilliseconds / 1000.0f;
var viewProj = Matrix4.Mult(this.view, this.proj);
var worldViewProj = Matrix4.CreateRotationY(time * 2) * Matrix4.Scale(0.0015f) * viewProj;
worldViewProj = Matrix4.Transpose(worldViewProj);
this.param.WorldViewProjection = worldViewProj;
SetConstantBuffer(this.param, constantBuffer);
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// 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;
// If we have a valid drawable, begin the commands to render into it
if (renderPassDescriptor != null)
{
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
// Set context state
renderEncoder.SetDepthStencilState(depthState);
renderEncoder.SetRenderPipelineState(pipelineState);
renderEncoder.SetVertexBuffer(objMesh.VertexBuffers[0].Buffer, objMesh.VertexBuffers[0].Offset, 0);
renderEncoder.SetVertexBuffer(constantBuffer, (nuint)Marshal.SizeOf <Matrix4>(), 1);
renderEncoder.SetFragmentTexture(this.texture, 0);
renderEncoder.SetFragmentSamplerState(this.sampler, 0);
for (int i = 0; i < objMesh.Submeshes.Length; i++)
{
MTKSubmesh submesh = objMesh.Submeshes[i];
renderEncoder.DrawIndexedPrimitives(submesh.PrimitiveType, submesh.IndexCount, submesh.IndexType, submesh.IndexBuffer.Buffer, submesh.IndexBuffer.Offset);
}
// We're done encoding commands
renderEncoder.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 override MPSCnnConvolutionWeightsAndBiasesState Update(IMTLCommandBuffer commandBuffer, MPSCnnConvolutionGradientState gradientState, MPSCnnConvolutionWeightsAndBiasesState sourceState)
{
updateCount++;
updater.Encode(commandBuffer, gradientState, sourceState, momentumVectors, velocityVectors, convWtsAndBias);
if (updateCount != updater.TimeStep)
{
throw new Exception($"Update time step is out of synch");
}
//Console.WriteLine ($"UpdateWeights of Conv2dDataSource {this.Label}");
return(convWtsAndBias);
}
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();
}
static void SignalFenceWhenCompleted(AmtSemaphore fence, IMTLCommandBuffer cb)
{
// SIGNAL ORDER.FENCE
if (fence != null)
{
fence.Reset();
cb.AddCompletedHandler(
(b) =>
{
fence.Signal();
}
);
}
}
static void TriggerSemaphores(AmtSemaphore[] signals, IMTLCommandBuffer cb)
{
// SIGNAL SEMAPHORE
foreach (var signal in signals)
{
signal.Reset();
// APPLY HANDLER TO COMMAND BUFFER
cb.AddCompletedHandler(
(b) =>
{
signal.Signal();
}
);
}
}
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 Draw(MTKView view)
{
inflightSemaphore.WaitOne();
Update();
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
commandBuffer.Label = "Main Command Buffer";
MTLRenderPassDescriptor renderPassDescriptor = view.CurrentRenderPassDescriptor;
// Create a render command encoder so we can render into something.
IMTLRenderCommandEncoder renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
renderEncoder.Label = "Final Pass Encoder";
renderEncoder.SetViewport(new MTLViewport(0.0, 0.0, view.DrawableSize.Width, view.DrawableSize.Height, 0.0, 1.0));
renderEncoder.SetDepthStencilState(depthState);
renderEncoder.SetRenderPipelineState(pipelineState);
// Set the our per frame uniforms.
renderEncoder.SetVertexBuffer(frameUniformBuffers[constantDataBufferIndex], 0, (nuint)(int)BufferIndex.FrameUniformBuffer);
renderEncoder.PushDebugGroup("Render Meshes");
// Render each of our meshes.
foreach (MetalKitEssentialsMesh mesh in meshes)
{
mesh.RenderWithEncoder(renderEncoder);
}
renderEncoder.PopDebugGroup();
renderEncoder.EndEncoding();
var drawable = view.CurrentDrawable;
commandBuffer.AddCompletedHandler(_ => {
inflightSemaphore.Release();
drawable.Dispose();
});
constantDataBufferIndex = (constantDataBufferIndex + 1) % maxInflightBuffers;
commandBuffer.PresentDrawable(drawable);
commandBuffer.Commit();
}
static AmtCommandRecording GenerateRecording(IMTLCommandBuffer cb, AmtCommandBuffer buffer)
{
return new AmtCommandRecording
{
CommandBuffer = cb,
Compute = new AmtComputeRecording
{
Grid = buffer.Record.ComputeGrid,
},
Graphics = new AmtGraphicsRecording
{
Grid = buffer.Record.GraphicsGrid,
},
Blit = new AmtBlitRecording
{
Grid = buffer.Record.BlitGrid,
},
};
}
void PerformRequests(long key)
{
AmtQueueSubmission request;
if (mSubmissions.TryGetValue(key, out request))
{
int requirements = request.Waits.Length;
int checks = 0;
foreach (var signal in request.Waits)
{
if (signal.IsSignalled)
{
++checks;
}
}
// render
if (checks >= requirements)
{
mRenderer.Render(request);
if (request.Swapchains != null)
{
foreach (var info in request.Swapchains)
{
IMTLCommandBuffer presentCmd = mPresentQueue.CommandBuffer();
var imageInfo = info.Swapchain.Images[info.ImageIndex];
presentCmd.AddCompletedHandler((buffer) =>
{
imageInfo.Drawable.Dispose();
imageInfo.Inflight.Set();
});
presentCmd.PresentDrawable(imageInfo.Drawable);
presentCmd.Commit();
}
}
AmtQueueSubmission removedItem;
mSubmissions.TryRemove(key, out removedItem);
}
}
}
void Render()
{
// Create a new command buffer for each renderpass to the current drawable.
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// Initialize MetalPerformanceShaders gaussianBlur with Sigma = 10.0f.
var gaussianblur = new MPSImageGaussianBlur(metalView.Device, 10f);
var drawable = ((CAMetalLayer)metalView.Layer).NextDrawable();
// Run MetalPerformanceShader gaussianblur.
gaussianblur.EncodeToCommandBuffer(commandBuffer, sourceTexture, drawable.Texture);
// Schedule a present using the current drawable.
commandBuffer.PresentDrawable(drawable);
// Finalize command buffer.
commandBuffer.Commit();
commandBuffer.WaitUntilCompleted();
// To reuse a CAMetalDrawable object’s texture, you must deallocate the drawable after presenting it.
drawable.Dispose();
}
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;
}
public void Draw(MTKView view)
{
inflightSemaphore.WaitOne();
// Perofm any app logic, including updating any Metal buffers.
Update();
// Create a new command buffer for each renderpass to the current drawable.
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
commandBuffer.Label = "Main Command Buffer";
// 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 renderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
renderEncoder.Label = "Final Pass Encoder";
// Set context state.
renderEncoder.SetViewport(new MTLViewport(0d, 0d, view.DrawableSize.Width, view.DrawableSize.Height, 0d, 1d));
renderEncoder.SetDepthStencilState(depthState);
renderEncoder.SetRenderPipelineState(pipelineState);
// Set the our per frame uniforms.
renderEncoder.SetVertexBuffer(frameUniformBuffers[constantDataBufferIndex], 0, (nuint)(int)BufferIndex.FrameUniformBuffer);
renderEncoder.PushDebugGroup("Render Meshes");
// Render each of our meshes.
foreach (MetalKitEssentialsMesh mesh in meshes)
{
mesh.RenderWithEncoder(renderEncoder);
}
renderEncoder.PopDebugGroup();
// We're done encoding commands.
renderEncoder.EndEncoding();
/*
* 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;
commandBuffer.AddCompletedHandler(_ => {
inflightSemaphore.Release();
drawable.Dispose();
});
/*
* The renderview assumes it can now increment the buffer index and that
* the previous index won't be touched until we cycle back around to the same index.
*/
constantDataBufferIndex = (constantDataBufferIndex + 1) % maxInflightBuffers;
// 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();
}
internal CommandBuffer(GraphicsDevice graphicsDevice, IMTLCommandBuffer commandBuffer)
: base(graphicsDevice)
{
_commandBuffer = commandBuffer;
}
public static void SetHeapCacheDuration(IMTLCommandBuffer commandBuffer, double seconds) => MPSSetHeapCacheDuration(commandBuffer == null ? IntPtr.Zero : commandBuffer.Handle, seconds);
public static void HintTemporaryMemoryHighWaterMark(IMTLCommandBuffer commandBuffer, nuint sizeInBytes) => MPSHintTemporaryMemoryHighWaterMark(commandBuffer == null ? IntPtr.Zero : commandBuffer.Handle, sizeInBytes);
public void Draw(MTKView view)
{
// Update
var time = clock.ElapsedMilliseconds / 1000.0f;
var viewProj = Matrix4.Mult(this.view, this.proj);
var worldViewProj = Matrix4.CreateRotationX(time) * Matrix4.CreateRotationY(time * 2) * Matrix4.CreateRotationZ(time * .7f) * viewProj;
worldViewProj = Matrix4.Transpose(worldViewProj);
this.cubeParameters.WorldViewProjection = worldViewProj;
this.SetConstantBuffer(this.cubeParameters, this.cubeConstantBuffer);
// Create a new command buffer for each renderpass to the current drawable
IMTLCommandBuffer commandBuffer = commandQueue.CommandBuffer();
// 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;
renderPassDescriptor.ColorAttachments[0].Texture = this.colorFrameBufferTexture;
renderPassDescriptor.ColorAttachments[0].ClearColor = new MTLClearColor(0.5f, 0.75f, 1, 1);
// If we have a valid drawable, begin the commands to render into it
if (renderPassDescriptor != null)
{
//--------------------------------
// Draw Triangle
//--------------------------------
// Create a render command encoder so we can render into something
IMTLRenderCommandEncoder triangleRenderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
triangleRenderEncoder.SetDepthStencilState(depthStencilState);
triangleRenderEncoder.SetRenderPipelineState(trianglePipelineState);
triangleRenderEncoder.SetVertexBuffer(triangleVertexBuffer, 0, 0);
// Tell the render context we want to draw our primitives
triangleRenderEncoder.DrawPrimitives(MTLPrimitiveType.Triangle, 0, (nuint)triangleVertexData.Length);
triangleRenderEncoder.EndEncoding();
//--------------------------------
// Draw Cube
//--------------------------------
renderPassDescriptor.ColorAttachments[0].Texture = drawable.Texture;
renderPassDescriptor.ColorAttachments[0].ClearColor = mtkView.ClearColor;
IMTLRenderCommandEncoder cubeRenderEncoder = commandBuffer.CreateRenderCommandEncoder(renderPassDescriptor);
cubeRenderEncoder.SetDepthStencilState(depthStencilState);
// Set context state
cubeRenderEncoder.SetRenderPipelineState(cubePipelineState);
cubeRenderEncoder.SetVertexBuffer(cubeVertexBuffer, 0, 0);
cubeRenderEncoder.SetVertexBuffer(cubeConstantBuffer, (nuint)Marshal.SizeOf(this.cubeParameters), 1);
cubeRenderEncoder.SetFragmentTexture(this.colorFrameBufferTexture, 0);
cubeRenderEncoder.SetFragmentSamplerState(this.sampler, 0);
// Tell the render context we want to draw our primitives
cubeRenderEncoder.DrawPrimitives(MTLPrimitiveType.Triangle, 0, (nuint)cubeVertexData.Length);
// We're done encoding commands
cubeRenderEncoder.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 override void BeginRender()
{
_cmdBuffer = _cmdQueue.CommandBuffer();
_device.SetOffscreenCommandBuffer(_cmdBuffer.Handle);
}
internal CommandBuffer(GraphicsDevice graphicsDevice, IMTLCommandBuffer deviceCommandBuffer)
: base(graphicsDevice)
{
_deviceCommandBuffer = deviceCommandBuffer;
}
/// <summary>
/// Encode a MPSCnnKernel into a command Buffer. The operation shall proceed out-of-place.
/// We calculate the appropriate offset as per how TensorFlow calculates its padding using input image size and stride here.
/// This [Link](https://github.com/tensorflow/tensorflow/blob/master/tensorflow/python/ops/nn.py) has an explanation in header comments how tensorFlow pads its convolution input images.
/// </summary>
/// <param name="commandBuffer">A valid MTLCommandBuffer to receive the encoded filter</param>
/// <param name="sourceImage">A valid MPSImage object containing the source image.</param>
/// <param name="destinationImage">A valid MPSImage to be overwritten by result image. destinationImage may not alias sourceImage</param>
public override void EncodeToCommandBuffer (IMTLCommandBuffer commandBuffer, MPSImage sourceImage, MPSImage destinationImage)
{
// select offset according to padding being used or not
if (padding) {
var pad_along_height = ((destinationImage.Height - 1) * StrideInPixelsY + KernelHeight - sourceImage.Height);
var pad_along_width = ((destinationImage.Width - 1) * StrideInPixelsX + KernelWidth - sourceImage.Width);
var pad_top = pad_along_height / 2;
var pad_left = pad_along_width / 2;
Offset = new MPSOffset {
X = (nint)(KernelWidth / 2 - pad_left),
Y = (nint)(KernelHeight / 2 - pad_top),
Z = 0
};
} else {
Offset = new MPSOffset {
X = (nint)(KernelWidth / 2),
Y = (nint)(KernelHeight / 2),
Z = 0
};
}
base.EncodeToCommandBuffer (commandBuffer, sourceImage, destinationImage);
}