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();
}
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();
}
private void PlatformSetViewport(Viewport viewport)
{
_deviceCommandEncoder.SetViewport(viewport.ToMTLViewport());
_deviceCommandEncoder.SetScissorRect(new MTLScissorRect(0, 0, (nuint)viewport.Width, (nuint)viewport.Height));
}
