void SetupRenderPassDescriptorForTexture(IMTLTexture texture)
{
if (renderPassDescriptor == null)
{
renderPassDescriptor = MTLRenderPassDescriptor.CreateRenderPassDescriptor();
}
renderPassDescriptor.ColorAttachments [0].Texture = texture;
renderPassDescriptor.ColorAttachments [0].LoadAction = MTLLoadAction.Clear;
renderPassDescriptor.ColorAttachments [0].ClearColor = new MTLClearColor(0.65f, 0.65f, 0.65f, 1.0f);
renderPassDescriptor.ColorAttachments [0].StoreAction = MTLStoreAction.Store;
if (depthTex == null || (depthTex.Width != texture.Width || depthTex.Height != texture.Height))
{
// If we need a depth texture and don't have one, or if the depth texture we have is the wrong size
// Then allocate one of the proper size
MTLTextureDescriptor desc = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.Depth32Float, texture.Width, texture.Height, false);
if (ObjCRuntime.Runtime.Arch == ObjCRuntime.Arch.SIMULATOR)
{
desc.StorageMode = MTLStorageMode.Private;
}
depthTex = device.CreateTexture(desc);
depthTex.Label = "Depth";
renderPassDescriptor.DepthAttachment.Texture = depthTex;
renderPassDescriptor.DepthAttachment.LoadAction = MTLLoadAction.Clear;
renderPassDescriptor.DepthAttachment.ClearDepth = 1.0f;
renderPassDescriptor.DepthAttachment.StoreAction = MTLStoreAction.DontCare;
}
}
private void PlatformConstruct(
GraphicsDevice graphicsDevice,
ResourceUploadBatch uploadBatch,
PixelFormat pixelFormat,
int width,
int height,
TextureMipMapData[] mipMapData)
{
var textureDescriptor = MTLTextureDescriptor.CreateTexture2DDescriptor(
pixelFormat.ToMTLPixelFormat(),
(nuint)width,
(nuint)height,
true); // Ignored, because we'll set the mip level count explicitly below.
textureDescriptor.Usage = MTLTextureUsage.ShaderRead;
textureDescriptor.MipmapLevelCount = (nuint)mipMapData.Length;
_originalPixelFormat = pixelFormat;
DeviceTexture = AddDisposable(graphicsDevice.Device.CreateTexture(textureDescriptor));
for (var i = 0; i < mipMapData.Length; i++)
{
SetData(
i,
mipMapData[i].Data,
mipMapData[i].BytesPerRow);
}
}
public void MTLTextureDescriptorCreateTest ()
{
var arr = new MTLTextureDescriptor [10];
for (nuint i = 0; i < 10; i++)
arr [i] = MTLTextureDescriptor.CreateTexture2DDescriptor (MTLPixelFormat.Depth32Float, 50 + i, 50 + i, false);
var resList = MPSStateResourceList.Create (arr[0], arr [1], arr [2], arr [3], arr [4], arr [5], arr [6], arr [7], arr [8], arr [9]);
Assert.NotNull (resList, "resList");
var state = new MPSState (device, resList);
Assert.That (state.ResourceCount, Is.EqualTo (10), "ResourceCount");
}
bool PrepareCompute()
{
NSError error;
// Create a compute kernel function
IMTLFunction function = shaderLibrary.CreateFunction("grayscale");
if (function == null)
{
Console.WriteLine("ERROR: Failed creating a new function!");
return(false);
}
// Create a compute kernel
kernel = device.CreateComputePipelineState(function, out error);
if (kernel == null)
{
Console.WriteLine("ERROR: Failed creating a compute kernel: %@", error.Description);
return(false);
}
MTLTextureDescriptor texDesc = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, (nuint)size.Width, (nuint)size.Height, false);
if (texDesc == null)
{
Console.WriteLine("ERROR: Failed creating a texture 2d descriptor with RGBA unnormalized pixel format!");
return(false);
}
outTexture = device.CreateTexture(texDesc);
if (outTexture == null)
{
Console.WriteLine("ERROR: Failed creating an output 2d texture!");
return(false);
}
// Set the compute kernel's workgroup size and count
workgroupSize = new MTLSize(1, 1, 1);
localCount = new MTLSize((nint)size.Width, (nint)size.Height, 1);
return(true);
}
public void Metal()
{
TestRuntime.AssertDevice();
TestRuntime.AssertXcodeVersion(10, 0);
device = MTLDevice.SystemDefault;
// some older hardware won't have a default
if (device == null || !MPSKernel.Supports(device))
{
Assert.Inconclusive("Metal is not supported");
}
cache = NSArray <MPSState> .FromNSObjects(
new MPSState (device, MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA32Float, 220, 220, false)),
new MPSState (device, MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA32Float, 221, 221, false)),
new MPSState (device, MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA32Float, 222, 222, false)),
new MPSState (device, MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA32Float, 223, 223, false)),
new MPSState (device, MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA32Float, 224, 224, false)),
new MPSState (device, MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA32Float, 225, 225, false))
);
}
public void ReturnReleaseTest()
{
// This test tries to exercise all the Metal API that has a
// ReturnRelease attribute. To test that the attribute does the
// right thing: run the test app using instruments, run the test
// several times by tapping on it, and do a heap mark between each
// test. Then verify that there's at least one heap shot with 0
// memory increase, which means that nothing is leaking.
var device = MTLDevice.SystemDefault;
IntPtr buffer_mem;
int buffer_length;
bool freed;
byte [] buffer_bytes;
// some older hardware won't have a default
if (device == null)
{
Assert.Inconclusive("Metal is not supported");
}
// Apple claims that "Indirect command buffers" are available with MTLGPUFamilyCommon2, but it crashes on at least one machine.
// Log what the current device supports, just to have it in the log.
foreach (MTLFeatureSet fs in Enum.GetValues(typeof(MTLFeatureSet)))
{
Console.WriteLine($"This device supports feature set: {fs}: {device.SupportsFeatureSet (fs)}");
}
if (TestRuntime.CheckXcodeVersion(11, 0))
{
foreach (MTLGpuFamily gf in Enum.GetValues(typeof(MTLGpuFamily)))
{
Console.WriteLine($"This device supports Gpu family: {gf}: {device.SupportsFamily (gf)}");
}
}
string metal_code = File.ReadAllText(Path.Combine(NSBundle.MainBundle.ResourcePath, "metal-sample.metal"));
string metallib_path = Path.Combine(NSBundle.MainBundle.ResourcePath, "default.metallib");
string fragmentshader_path = Path.Combine(NSBundle.MainBundle.ResourcePath, "fragmentShader.metallib");
#if !__MACOS__ && !__MACCATALYST__
if (Runtime.Arch == Arch.SIMULATOR)
{
Assert.Ignore("Metal isn't available in the simulator");
}
#endif
using (var hd = new MTLHeapDescriptor()) {
hd.CpuCacheMode = MTLCpuCacheMode.DefaultCache;
hd.StorageMode = MTLStorageMode.Private;
using (var txt = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 40, 40, false)) {
var sa = device.GetHeapTextureSizeAndAlign(txt);
hd.Size = sa.Size;
using (var heap = device.CreateHeap(hd)) {
Assert.IsNotNull(heap, $"NonNullHeap");
}
}
}
using (var queue = device.CreateCommandQueue()) {
Assert.IsNotNull(queue, "Queue: NonNull 1");
}
#if __MACOS__
if (TestRuntime.CheckXcodeVersion(10, 0) && device.SupportsFeatureSet(MTLFeatureSet.macOS_GPUFamily2_v1))
{
using (var descriptor = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 64, 64, false)) {
descriptor.StorageMode = MTLStorageMode.Private;
using (var texture = device.CreateSharedTexture(descriptor)) {
Assert.IsNotNull(texture, "CreateSharedTexture (MTLTextureDescriptor): NonNull");
using (var handle = texture.CreateSharedTextureHandle())
using (var shared = device.CreateSharedTexture(handle))
Assert.IsNotNull(texture, "CreateSharedTexture (MTLSharedTextureHandle): NonNull");
}
}
}
#endif
using (var queue = device.CreateCommandQueue(10)) {
Assert.IsNotNull(queue, "Queue: NonNull 2");
}
using (var buffer = device.CreateBuffer(1024, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(buffer, "CreateBuffer: NonNull 1");
}
buffer_mem = AllocPageAligned(1, out buffer_length);
using (var buffer = device.CreateBuffer(buffer_mem, (nuint)buffer_length, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(buffer, "CreateBuffer: NonNull 2");
}
FreePageAligned(buffer_mem, buffer_length);
buffer_bytes = new byte [getpagesize()];
using (var buffer = device.CreateBuffer(buffer_bytes, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(buffer, "CreateBuffer: NonNull 3");
}
buffer_mem = AllocPageAligned(1, out buffer_length);
freed = false;
#if __MACOS__
var resourceOptions7 = MTLResourceOptions.StorageModeManaged;
#else
var resourceOptions7 = MTLResourceOptions.CpuCacheModeDefault;
#endif
using (var buffer = device.CreateBufferNoCopy(buffer_mem, (nuint)buffer_length, resourceOptions7, (pointer, length) => { FreePageAligned(pointer, (int)length); freed = true; })) {
Assert.IsNotNull(buffer, "CreateBufferNoCopy: NonNull 1");
}
Assert.IsTrue(freed, "CreateBufferNoCopy: Freed 1");
using (var descriptor = new MTLDepthStencilDescriptor())
using (var dss = device.CreateDepthStencilState(descriptor)) {
Assert.IsNotNull(dss, "CreateDepthStencilState: NonNull 1");
}
using (var descriptor = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 64, 64, false)) {
using (var texture = device.CreateTexture(descriptor))
Assert.NotNull(texture, "CreateTexture: NonNull 1");
using (var surface = new IOSurface.IOSurface(new IOSurface.IOSurfaceOptions {
Width = 64,
Height = 64,
BytesPerElement = 4,
})) {
using (var texture = device.CreateTexture(descriptor, surface, 0))
Assert.NotNull(texture, "CreateTexture: NonNull 2");
}
}
using (var descriptor = new MTLSamplerDescriptor())
using (var sampler = device.CreateSamplerState(descriptor))
Assert.IsNotNull(sampler, "CreateSamplerState: NonNull 1");
using (var library = device.CreateDefaultLibrary())
Assert.IsNotNull(library, "CreateDefaultLibrary: NonNull 1");
using (var library = device.CreateLibrary(metallib_path, out var error)) {
Assert.IsNotNull(library, "CreateLibrary: NonNull 1");
Assert.IsNull(error, "CreateLibrary: NonNull error 1");
}
using (var data = DispatchData.FromByteBuffer(File.ReadAllBytes(metallib_path)))
using (var library = device.CreateLibrary(data, out var error)) {
Assert.IsNotNull(library, "CreateLibrary: NonNull 2");
Assert.IsNull(error, "CreateLibrary: NonNull error 2");
}
using (var compile_options = new MTLCompileOptions())
using (var library = device.CreateLibrary(metal_code, compile_options, out var error)) {
Assert.IsNotNull(library, "CreateLibrary: NonNull 3");
Assert.IsNull(error, "CreateLibrary: NonNull error 3");
}
using (var compile_options = new MTLCompileOptions()) {
device.CreateLibrary(metal_code, compile_options, (library, error) => {
Assert.IsNotNull(library, "CreateLibrary: NonNull 4");
Assert.IsNull(error, "CreateLibrary: NonNull error 4");
});
}
using (var library = device.CreateDefaultLibrary(NSBundle.MainBundle, out var error)) {
Assert.IsNotNull(library, "CreateDefaultLibrary: NonNull 2");
Assert.IsNull(error, "CreateDefaultLibrary: NonNull error 2");
}
using (var descriptor = new MTLRenderPipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("vertexShader")) {
descriptor.VertexFunction = func;
descriptor.ColorAttachments [0].PixelFormat = MTLPixelFormat.BGRA8Unorm_sRGB;
using (var rps = device.CreateRenderPipelineState(descriptor, out var error)) {
Assert.IsNotNull(rps, "CreateRenderPipelineState: NonNull 1");
Assert.IsNull(error, "CreateRenderPipelineState: NonNull error 1");
}
}
using (var descriptor = new MTLRenderPipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("vertexShader")) {
descriptor.VertexFunction = func;
descriptor.ColorAttachments [0].PixelFormat = MTLPixelFormat.BGRA8Unorm_sRGB;
using (var rps = device.CreateRenderPipelineState(descriptor, MTLPipelineOption.BufferTypeInfo, out var reflection, out var error)) {
Assert.IsNotNull(rps, "CreateRenderPipelineState: NonNull 2");
Assert.IsNull(error, "CreateRenderPipelineState: NonNull error 2");
Assert.IsNotNull(reflection, "CreateRenderPipelineState: NonNull reflection 2");
}
}
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("grayscaleKernel"))
using (var cps = device.CreateComputePipelineState(func, MTLPipelineOption.ArgumentInfo, out var reflection, out var error)) {
Assert.IsNotNull(cps, "CreateComputePipelineState: NonNull 1");
Assert.IsNull(error, "CreateComputePipelineState: NonNull error 1");
Assert.IsNotNull(reflection, "CreateComputePipelineState: NonNull reflection 1");
}
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("grayscaleKernel"))
using (var cps = device.CreateComputePipelineState(func, out var error)) {
Assert.IsNotNull(cps, "CreateComputePipelineState: NonNull 2");
Assert.IsNull(error, "CreateComputePipelineState: NonNull error 2");
}
using (var descriptor = new MTLComputePipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("grayscaleKernel")) {
descriptor.ComputeFunction = func;
using (var cps = device.CreateComputePipelineState(descriptor, MTLPipelineOption.BufferTypeInfo, out var reflection, out var error)) {
Assert.IsNotNull(cps, "CreateComputePipelineState: NonNull 3");
Assert.IsNull(error, "CreateComputePipelineState: NonNull error 3");
Assert.IsNotNull(reflection, "CreateComputePipelineState: NonNull reflection 3");
}
}
using (var fence = device.CreateFence()) {
Assert.IsNotNull(fence, "CreateFence 1: NonNull");
}
var url = "file://" + metallib_path;
url = url.Replace(" ", "%20"); // url encode!
using (var library = device.CreateLibrary(new NSUrl(url), out var error)) {
#if NET
// Looks like creating a library with a url always fails: https://forums.developer.apple.com/thread/110416
Assert.IsNotNull(library, "CreateLibrary (NSUrl, NSError): Null");
Assert.IsNull(error, "CreateLibrary (NSUrl, NSError): NonNull error");
#else
// Looks like creating a library with a url always fails: https://forums.developer.apple.com/thread/110416
Assert.IsNull(library, "CreateLibrary (NSUrl, NSError): Null");
Assert.IsNotNull(error, "CreateLibrary (NSUrl, NSError): NonNull error");
#endif
}
using (var library = device.CreateArgumentEncoder(new MTLArgumentDescriptor [] { new MTLArgumentDescriptor()
{
DataType = MTLDataType.Int
} })) {
Assert.IsNotNull(library, "CreateArgumentEncoder (MTLArgumentDescriptor[]): NonNull");
}
// Apple's charts say that "Indirect command buffers" are supported with MTLGpuFamilyCommon2
var supportsIndirectCommandBuffers = TestRuntime.CheckXcodeVersion(11, 0) && device.SupportsFamily(MTLGpuFamily.Common2);
#if __MACOS__
// but something's not quite right somewhere, so on macOS verify that the device supports a bit more than what Apple says.
supportsIndirectCommandBuffers &= device.SupportsFeatureSet(MTLFeatureSet.macOS_GPUFamily2_v1);
#endif
if (supportsIndirectCommandBuffers)
{
using (var descriptor = new MTLIndirectCommandBufferDescriptor()) {
using (var library = device.CreateIndirectCommandBuffer(descriptor, 1, MTLResourceOptions.CpuCacheModeDefault)) {
Assert.IsNotNull(library, "CreateIndirectCommandBuffer: NonNull");
}
}
using (var evt = device.CreateEvent()) {
Assert.IsNotNull(evt, "CreateEvent: NonNull");
}
using (var evt = device.CreateSharedEvent()) {
Assert.IsNotNull(evt, "CreateSharedEvent: NonNull");
}
using (var evt1 = device.CreateSharedEvent())
using (var evt_handle = evt1.CreateSharedEventHandle())
using (var evt = device.CreateSharedEvent(evt_handle)) {
Assert.IsNotNull(evt, "CreateSharedEvent (MTLSharedEventHandle): NonNull");
}
}
using (var descriptor = new MTLRenderPipelineDescriptor())
using (var library = device.CreateDefaultLibrary())
using (var func = library.CreateFunction("vertexShader")) {
descriptor.VertexFunction = func;
descriptor.ColorAttachments [0].PixelFormat = MTLPixelFormat.BGRA8Unorm_sRGB;
using (var rps = device.CreateRenderPipelineState(descriptor, MTLPipelineOption.ArgumentInfo, out var reflection, out var error)) {
Assert.IsNotNull(rps, "CreateRenderPipelineState (MTLTileRenderPipelineDescriptor, MTLPipelineOption, MTLRenderPipelineReflection, NSError): NonNull");
Assert.IsNull(error, "CreateRenderPipelineState (MTLTileRenderPipelineDescriptor, MTLPipelineOption, MTLRenderPipelineReflection, NSError: NonNull error");
Assert.IsNotNull(reflection, "CreateRenderPipelineState (MTLTileRenderPipelineDescriptor, MTLPipelineOption, MTLRenderPipelineReflection, NSError): NonNull reflection");
}
}
using (var buffer = device.CreateBuffer(1024, MTLResourceOptions.CpuCacheModeDefault))
using (var descriptor = new MTLTextureDescriptor())
using (var texture = buffer.CreateTexture(descriptor, 0, 256)) {
Assert.IsNotNull(buffer, "MTLBuffer.CreateTexture (MTLTextureDescriptor, nuint, nuint): NonNull");
}
using (var descriptor = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 64, 64, false))
using (var texture = device.CreateTexture(descriptor)) {
using (var view = texture.CreateTextureView(MTLPixelFormat.RGBA8Unorm)) {
Assert.IsNotNull(view, "MTLTexture.CreateTextureView (MTLPixelFormat): nonnull");
}
using (var view = texture.CreateTextureView(MTLPixelFormat.RGBA8Unorm, MTLTextureType.k2D, new NSRange(0, 1), new NSRange(0, 1))) {
Assert.IsNotNull(view, "MTLTexture.CreateTextureView (MTLPixelFormat, MTLTextureType, NSRange, NSRange): nonnull");
}
}
using (var library = device.CreateLibrary(fragmentshader_path, out var error)) {
Assert.IsNull(error, "MTLFunction.CreateArgumentEncoder: library creation failure");
using (var func = library.CreateFunction("fragmentShader2")) {
using (var enc = func.CreateArgumentEncoder(0)) {
Assert.IsNotNull(enc, "MTLFunction.CreateArgumentEncoder (nuint): NonNull");
}
using (var enc = func.CreateArgumentEncoder(0, out var reflection)) {
Assert.IsNotNull(enc, "MTLFunction.CreateArgumentEncoder (nuint, MTLArgument): NonNull");
Assert.IsNotNull(reflection, "MTLFunction.CreateArgumentEncoder (nuint, MTLArgument): NonNull reflection");
}
}
}
using (var library = device.CreateDefaultLibrary()) {
using (var func = library.CreateFunction("grayscaleKernel")) {
Assert.IsNotNull(func, "CreateFunction (string): nonnull");
}
if (TestRuntime.CheckXcodeVersion(9, 0)) // MTLFunctionConstantValues didn't have a default ctor until Xcode 9.
{
using (var constants = new MTLFunctionConstantValues())
using (var func = library.CreateFunction("grayscaleKernel", constants, out var error)) {
Assert.IsNotNull(func, "CreateFunction (string, MTLFunctionConstantValues, NSError): nonnull");
Assert.IsNull(error, "CreateFunction (string, MTLFunctionConstantValues, NSError): null error");
}
}
}
using (var hd = new MTLHeapDescriptor()) {
hd.CpuCacheMode = MTLCpuCacheMode.DefaultCache;
hd.StorageMode = MTLStorageMode.Private;
using (var txt = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 40, 40, false)) {
var sa = device.GetHeapTextureSizeAndAlign(txt);
hd.Size = sa.Size;
using (var heap = device.CreateHeap(hd))
using (var buffer = heap.CreateBuffer(1024, MTLResourceOptions.StorageModePrivate)) {
Assert.IsNotNull(buffer, "MTLHeap.CreateBuffer (nuint, MTLResourceOptions): nonnull");
}
}
}
using (var hd = new MTLHeapDescriptor()) {
hd.CpuCacheMode = MTLCpuCacheMode.DefaultCache;
#if __MACOS__ || __MACCATALYST__
hd.StorageMode = MTLStorageMode.Private;
#else
hd.StorageMode = MTLStorageMode.Shared;
#endif
using (var txt = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, 40, 40, false)) {
var sa = device.GetHeapTextureSizeAndAlign(txt);
hd.Size = sa.Size;
using (var heap = device.CreateHeap(hd)) {
#if __MACOS__ || __MACCATALYST__
txt.StorageMode = MTLStorageMode.Private;
#endif
using (var texture = heap.CreateTexture(txt)) {
Assert.IsNotNull(texture, "MTLHeap.CreateTexture (MTLTextureDescriptor): nonnull");
}
}
}
}
using (var scope = MTLCaptureManager.Shared.CreateNewCaptureScope(device)) {
Assert.IsNotNull(scope, "MTLCaptureManager.CreateNewCaptureScope (MTLDevice): nonnull");
}
using (var queue = device.CreateCommandQueue())
using (var scope = MTLCaptureManager.Shared.CreateNewCaptureScope(queue)) {
Assert.IsNotNull(scope, "MTLCaptureManager.CreateNewCaptureScope (MTLCommandQueue): nonnull");
}
TestRuntime.AssertXcodeVersion(10, 0);
using (var evt = device.CreateSharedEvent())
using (var shared = evt.CreateSharedEventHandle()) {
Assert.IsNotNull(shared, "MTLSharedEvent.CreateSharedEvent: NonNull");
}
}
void SetupRenderPassDescriptorForTexture(IMTLTexture texture)
{
if (renderPassDescriptor == null)
{
renderPassDescriptor = new MTLRenderPassDescriptor();
}
MTLRenderPassColorAttachmentDescriptor colorAttachment = renderPassDescriptor.ColorAttachments [0];
colorAttachment.Texture = texture;
colorAttachment.LoadAction = MTLLoadAction.Clear;
colorAttachment.ClearColor = new MTLClearColor(0.65f, 0.65f, 0.65f, 1.0f);
if (SampleCount > 1)
{
if (msaaTex == null || NeedUpdate(texture, msaaTex))
{
var desc = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.BGRA8Unorm, texture.Width, texture.Height, false);
desc.TextureType = MTLTextureType.k2DMultisample;
desc.SampleCount = SampleCount;
msaaTex = device.CreateTexture(desc);
}
colorAttachment.Texture = msaaTex;
colorAttachment.ResolveTexture = texture;
// set store action to resolve in this case
colorAttachment.StoreAction = MTLStoreAction.MultisampleResolve;
}
else
{
colorAttachment.StoreAction = MTLStoreAction.Store;
}
if (DepthPixelFormat != MTLPixelFormat.Invalid)
{
if (depthTex == null || NeedUpdate(texture, depthTex))
{
var desc = MTLTextureDescriptor.CreateTexture2DDescriptor(DepthPixelFormat, texture.Width, texture.Height, false);
desc.TextureType = (SampleCount > 1) ? MTLTextureType.k2DMultisample : MTLTextureType.k2D;
desc.SampleCount = SampleCount;
depthTex = device.CreateTexture(desc);
MTLRenderPassDepthAttachmentDescriptor depthAttachment = renderPassDescriptor.DepthAttachment;
depthAttachment.Texture = depthTex;
depthAttachment.LoadAction = MTLLoadAction.Clear;
depthAttachment.StoreAction = MTLStoreAction.DontCare;
depthAttachment.ClearDepth = 1.0;
}
}
if (StencilPixelFormat != MTLPixelFormat.Invalid)
{
if (stencilTex == null || NeedUpdate(texture, stencilTex))
{
var desc = MTLTextureDescriptor.CreateTexture2DDescriptor(StencilPixelFormat, texture.Width, texture.Height, false);
desc.TextureType = (SampleCount > 1) ? MTLTextureType.k2DMultisample : MTLTextureType.k2D;
desc.SampleCount = SampleCount;
depthTex = device.CreateTexture(desc);
MTLRenderPassStencilAttachmentDescriptor stencilAttachment = renderPassDescriptor.StencilAttachment;
stencilAttachment.Texture = depthTex;
stencilAttachment.LoadAction = MTLLoadAction.Clear;
stencilAttachment.StoreAction = MTLStoreAction.DontCare;
stencilAttachment.ClearStencil = 1;
}
}
}
public bool Finalize(IMTLDevice device)
{
if (MetalTexture != null)
{
return(true);
}
UIImage image = UIImage.FromFile(path);
if (image == null)
{
return(false);
}
using (CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB()) {
if (colorSpace == null)
{
return(false);
}
Width = image.CGImage.Width;
Height = image.CGImage.Height;
nuint width = (nuint)Width;
nuint height = (nuint)Height;
nuint rowBytes = width * 4;
var context = new CGBitmapContext(IntPtr.Zero,
(int)width,
(int)height,
8,
(int)rowBytes,
colorSpace,
CGImageAlphaInfo.PremultipliedLast);
if (context == null)
{
return(false);
}
var bounds = new CGRect(0f, 0f, width, height);
context.ClearRect(bounds);
// Vertical Reflect
if (flip)
{
context.TranslateCTM(width, height);
context.ScaleCTM(-1f, -1f);
}
context.DrawImage(bounds, image.CGImage);
MTLTextureDescriptor texDesc = MTLTextureDescriptor.CreateTexture2DDescriptor(MTLPixelFormat.RGBA8Unorm, width, height, false);
if (texDesc == null)
{
return(false);
}
MetalTexture = device.CreateTexture(texDesc);
if (MetalTexture == null)
{
context.Dispose();
return(false);
}
IntPtr pixels = context.Data;
if (pixels != IntPtr.Zero)
{
var region = new MTLRegion();
region.Origin.X = 0;
region.Origin.Y = 0;
region.Size.Width = (nint)width;
region.Size.Height = (nint)height;
MetalTexture.ReplaceRegion(region, 0, pixels, rowBytes);
}
context.Dispose();
}
return(true);
}
