Я попытался использовать простой пример, представленный здесь: https://docs.microsoft.com/en-us/dotnet/api/xamarin.forms.openglview?view=xamarin-forms, чтобы попытаться создать представление XAML с классом OpenGLView.Но я сталкиваюсь с проблемами.Это Xamarin.Forms (l, работает на iOS Simulator и использует платформу Prism, macOS Mojave и Visual Studio для Mac 2019 Pro.
Вот мой код XAML:
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:prism="clr-namespace:Prism.Mvvm;assembly=Prism.Forms"
xmlns:otk="clr-namespace:OpenTK.Graphics.ES3"
x:Class="MyApp.Views.OpenGlPage">
<StackLayout HorizontalOptions="CenterAndExpand"
VerticalOptions="CenterAndExpand">
<OpenGLView x:Name="openGLView" HasRenderLoop="true"/>
<Button Command="{Binding Display}" Text="Display"/>
</StackLayout>
</ContentPage>
икод
using Xamarin.Forms;
using OpenTK.Graphics.ES30;
namespace MyApp.Views
{
public partial class OpenGlPage : ContentPage
{
float red, green, blue;
public OpenGlPage()
{
InitializeComponent();
Title = "OpenGL";
openGLView.HeightRequest = 300;
openGLView.WidthRequest = 300;
openGLView.OnDisplay = r => {
GL.ClearColor(red, green, blue, 1.0f);
GL.Clear((ClearBufferMask.ColorBufferBit |
ClearBufferMask.DepthBufferBit));
red += 0.01f;
if (red >= 1.0f)
red -= 1.0f;
green += 0.02f;
if (green >= 1.0f)
green -= 1.0f;
blue += 0.03f;
if (blue >= 1.0f)
blue -= 1.0f;
};
}
}
}
В ViewModel не так много, и представление правильно зарегистрировано в Prism, поэтому навигация к этому представлению работает нормально.
Но похоже, что есть какая-то проблемас тем, как OpenGL используется или инициализируется при отбрасывании в XAML, как это. Когда выполнение попадает в любой сбой приложения вызова GL. * Это ошибка:
=================================================================
Native Crash Reporting
=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
=================================================================
Basic Fault Adddress Reporting
=================================================================
instruction pointer is NULL, skip dumping
=================================================================
Native stacktrace:
=================================================================
0x10184704d - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : mono_dump_native_crash_info
0x10183b7a5 - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : mono_handle_native_crash
0x10184db43 - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : mono_sigsegv_signal_handler
0x10f329b5d - /usr/lib/system/libsystem_platform.dylib : _sigtramp
0x18 - Unknown
0x135d884bf - Unknown
0x135d88927 - Unknown
0x101850fa1 - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : mono_jit_runtime_invoke
0x10196ab78 - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : mono_runtime_invoke_checked
0x10196e4ce - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : mono_runtime_invoke
0x101a8142a - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : xamarin_invoke_trampoline
0x101a89365 - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : xamarin_arch_trampoline
0x101a8a761 - /Users/user/Library/Developer/CoreSimulator/Devices/602074EE-E100-4319-B9DE-D9460B6264EB/data/Containers/Bundle/Application/7937567A-2C4D-43A6-8A81-B27BFEF73EF6/Prism1.iOS.app/Prism1.iOS : xamarin_x86_64_common_trampoline
0x1077a8ffd - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/GLKit.framework/GLKit : -[GLKView _display:]
0x112231c21 - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/QuartzCore.framework/QuartzCore : -[CALayer display]
0x112244003 - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/QuartzCore.framework/QuartzCore : _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE
0x1121b33aa - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/QuartzCore.framework/QuartzCore : _ZN2CA7Context18commit_transactionEPNS_11TransactionE
0x1121ea584 - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/QuartzCore.framework/QuartzCore : _ZN2CA11Transaction6commitEv
0x117924d8a - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : _UIApplicationFlushRunLoopCATransactionIfTooLate
0x117a17f5f - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : __handleEventQueueInternal
0x10242ebe1 - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
0x10242e463 - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : __CFRunLoopDoSources0
0x102428b1f - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : __CFRunLoopRun
0x102428302 - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : CFRunLoopRunSpecific
0x11249f2fe - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices : GSEventRunModal
0x11792aba2 - /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : UIApplicationMain
0x134910932 - Unknown
0x1349106c3 - Unknown
=================================================================
Managed Stacktrace:
=================================================================
at <unknown> <0xffffffff>
at UIKit.UIApplication:UIApplicationMain <0x00211>
at UIKit.UIApplication:Main <0x000b2>
at UIKit.UIApplication:Main <0x00222>
at Prism1.iOS.Application:Main <0x00092>
at <Module>:runtime_invoke_void_object <0x00168>
=================================================================
Это происходит независимо от того, какой вызов GL у меня естьтам в обработчике OnDisplay. Если я удаляю вызовы GL, все работает, конечно, минус содержание OpenGL:)
Предупреждения компиляции: 