Switch to GLFW for windowing (space-wizards#914)

* Use GLFW instead of OpenTK windows

* Seems to work pretty well now.

* Fix stackalloc issue on Framework.

* Add GLFW project to sln.

* Fix package downgrade.

* Fix SLN more.

* Please work.

* Fix C# version error.

BuildChecker/BuildChecker.csproj

@@ -26,8 +26,6 @@ https://docs.microsoft.com/en-us/visualstudio/msbuild/msbuild
     <OutputType>Library</OutputType>
     <TargetFrameworkMoniker>.NETFramework, Version=v4.6.1</TargetFrameworkMoniker>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' " />
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' " />
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x64' " />
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x64' " />
   <PropertyGroup>
@@ -42,4 +40,4 @@ https://docs.microsoft.com/en-us/visualstudio/msbuild/msbuild
   </Target>
   <Target Name="Compile" />
   <Target Name="CoreCompile" />
-</Project>
+</Project>

MSBuild/Robust.Engine.targets

@@ -6,6 +6,10 @@
     <Exec Condition="'$(Platform)' == 'x64'" Command="$(Python) $(RobustToolsPath)download_swnfd.py $(Platform) $(TargetOS) $(OutputPath)" CustomErrorRegularExpression="^Error" />
     <Warning Condition="'$(Platform)' != 'x64'" Text="Did not download swnfd because the platform is not set to x64. Only use this build for unit testing!" />
   </Target>
+  <Target Name="CopyGlfw">
+    <Exec Condition="'$(Platform)' == 'x64'" Command="$(Python) $(RobustToolsPath)download_glfw.py $(Platform) $(TargetOS) $(OutputPath)" CustomErrorRegularExpression="^Error" />
+    <Warning Condition="'$(Platform)' != 'x64'" Text="Did not download GLFW because the platform is not set to x64. Only use this build for unit testing!" />
+  </Target>
   <Target Name="CopyMiscDependencies">
     <Exec Condition="'$(Platform)' == 'x64'" Command="$(Python) $(RobustToolsPath)download_misc_dependencies.py $(Platform) $(TargetOS) $(OutputPath)" CustomErrorRegularExpression="^Error" />
     <Warning Condition="'$(Platform)' != 'x64'" Text="Did not download misc dependencies because the platform is not set to x64. Only use this build for unit testing!" />

OpenToolkit.GraphicsLibraryFramework/Cursor.cs

@@ -0,0 +1,18 @@
+//
+// Cursor.cs
+//
+// Copyright (C) 2019 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// Opaque handle to a GLFW cursor.
+    /// </summary>
+    public struct Cursor
+    {
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/ClientApi.cs

@@ -0,0 +1,33 @@
+//
+// ClientApi.cs
+//
+// Copyright (C) 2019 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// The context client APIs.
+    /// </summary>
+    /// <seealso cref="GLFW.WindowHint(WindowHintClientApi,ClientApi)"/>
+    public enum ClientApi
+    {
+        /// <summary>
+        /// No context API is created.
+        /// </summary>
+        NoApi = 0,
+
+        /// <summary>
+        /// OpenGL context is created.
+        /// </summary>
+        OpenGlApi = 0x00030001,
+
+        /// <summary>
+        /// OpenGL ES context is created.
+        /// </summary>
+        OpenGlEsApi = 0x00030002
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/ConnectedState.cs

@@ -0,0 +1,27 @@
+//
+// ConnectedState.cs
+//
+// Copyright (C) 2019 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// Specifies connected state of devices.
+    /// </summary>
+    public enum ConnectedState
+    {
+        /// <summary>
+        /// Indicates that a device is connected.
+        /// </summary>
+        Connected = 0x00040001,
+
+        /// <summary>
+        /// Indicates that a device is disconnected.
+        /// </summary>
+        Disconnected = 0x00040002
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/ContextApi.cs

@@ -0,0 +1,27 @@
+//
+// ContextApi.cs
+//
+// Copyright (C) 2019 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// The context API used to create the window context.
+    /// </summary>
+    public enum ContextApi
+    {
+        /// <summary>
+        /// Uses the native context API to create the window context.
+        /// </summary>
+        NativeContextApi = 0x00036001,
+
+        /// <summary>
+        /// Uses Egl to create the window context.
+        /// </summary>
+        EglContextApi = 0x00036002
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/CursorModeValue.cs

@@ -0,0 +1,37 @@
+//
+// CursorModeValue.cs
+//
+// Copyright (C) 2018 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// The GLFW cursor modes.
+    /// See <a href="https://www.glfw.org/docs/latest/input_guide.html#cursor_mode">cursor modes</a>.
+    /// </summary>
+    public enum CursorModeValue
+    {
+        /// <summary>
+        /// The regular arrow cursor (or another cursor set with <see cref="GLFW.SetCursor"/>) is used
+        /// and cursor motion is not limited.
+        /// </summary>
+        CursorNormal = 0x00034001,
+
+        /// <summary>
+        /// Hides the arrow cursor when over a window.
+        /// </summary>
+        CursorHidden = 0x00034002,
+
+        /// <summary>
+        /// Will hide the cursor and lock it to the specified window.
+        /// GLFW will then take care of all the details of cursor re-centering and offset calculation
+        /// and providing the application with a virtual cursor position.
+        /// This virtual position is provided normally via both the cursor position callback and through polling.
+        /// </summary>
+        CursorDisabled = 0x00034003
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/CursorShape.cs

@@ -0,0 +1,47 @@
+//
+// CursorShape.cs
+//
+// Copyright (C) 2019 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// Standard cursor shapes.
+    /// </summary>
+    public enum CursorShape
+    {
+        /// <summary>
+        /// The standard arrow shape. Used in almost all situations.
+        /// </summary>
+        Arrow = 0x00036001,
+
+        /// <summary>
+        /// The I-Beam shape. Used when mousing over a place where text can be entered.
+        /// </summary>
+        IBeam = 0x00036002,
+
+        /// <summary>
+        /// The crosshair shape. Used when dragging and dropping.
+        /// </summary>
+        Crosshair = 0x00036003,
+
+        /// <summary>
+        /// The hand shape. Used when mousing over something that can be dragged around.
+        /// </summary>
+        Hand = 0x00036004,
+
+        /// <summary>
+        /// The horizontal resize shape. Used when mousing over something that can be horizontally resized.
+        /// </summary>
+        HResize = 0x00036005,
+
+        /// <summary>
+        /// The vertical resize shape. Used when mousing over something that can be vertically resized.
+        /// </summary>
+        VResize = 0x00036006
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/CursorStateAttribute.cs

@@ -0,0 +1,24 @@
+//
+// CursorStateAttribute.cs
+//
+// Copyright (C) 2018 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// Attribute for setting <see cref="CursorModeValue"/> of the cursor.
+    /// </summary>
+    /// <seealso cref="GLFW.SetInputMode(Window*,CursorStateAttribute,CursorModeValue)"/>
+    /// <seealso cref="GLFW.GetInputMode(Window*,CursorStateAttribute)"/>
+    public enum CursorStateAttribute
+    {
+        /// <summary>
+        /// Attribute for setting <see cref="CursorModeValue"/> of the cursor.
+        /// </summary>
+        Cursor = 0x00033001,
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/ErrorCode.cs

@@ -0,0 +1,103 @@
+//
+// ErrorCode.cs
+//
+// Copyright (C) 2019 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// Error codes, used in the error callback.
+    /// </summary>
+    public enum ErrorCode
+    {
+        /// <summary>
+        /// Everything is running as intended. Yay!
+        /// </summary>
+        NoError = 0,
+
+        /// <summary>
+        /// Called a function before calling <see cref="GLFW.Init"/>. Initialize GLFW and then try again.
+        /// </summary>
+        NotInitialized = 0x00010001,
+
+        /// <summary>
+        /// No OpenGL/OpenGL ES context on this thread.
+        /// </summary>
+        NoContext = 0x00010002,
+
+        /// <summary>
+        /// Used an invalid enum value on a function.
+        /// </summary>
+        /// <remarks>
+        /// <para>
+        /// This should hopefully never happen in the bindings, due to the added type safety of C# enums VS. GLFW's native #defines
+        /// </para>
+        /// </remarks>
+        InvalidEnum = 0x00010003,
+
+        /// <summary>
+        /// Called a function with an invalid argument.
+        /// </summary>
+        /// <remarks>
+        /// <para>
+        /// This can happen if you request an OpenGL version that doesn't exist, like 2.7.
+        /// </para>
+        /// <para>
+        /// If you request a version of OpenGL that exists, but isn't supported by this graphics card, it will return VersionUnavailable instead.
+        /// </para>
+        /// </remarks>
+        InvalidValue = 0x00010004,
+
+        /// <summary>
+        /// A memory allocation failed on GLFW's end.
+        /// </summary>
+        /// <remarks>
+        /// <para>
+        /// Report this to the GLFW issue tracker if encountered.
+        /// </para>
+        /// </remarks>
+        OutOfMemory = 0x00010005,
+
+        /// <summary>
+        /// The requested API is not available on the system.
+        /// </summary>
+        ApiUnavailable = 0x00010006,
+
+        /// <summary>
+        /// The requested OpenGL version is not available on the system.
+        /// </summary>
+        VersionUnavailable = 0x00010007,
+
+        /// <summary>
+        /// A platform-specific error occurred that doesn't fit into any more specific category.
+        /// </summary>
+        /// <remarks>
+        /// <para>
+        /// Report this to the GLFW issue tracker if encountered.
+        /// </para>
+        /// </remarks>
+        PlatformError = 0x00010008,
+
+        /// <summary>
+        /// The requested format is unavailable.
+        /// </summary>
+        /// <remarks>
+        /// <para>
+        /// If emitted during window creation, the requested pixel format isn't available.
+        /// </para>
+        /// <para>
+        /// If emitted when using the clipboard, the contents of the clipboard couldn't be converted to the requested format.
+        /// </para>
+        /// </remarks>
+        FormatUnavailable = 0x00010009,
+
+        /// <summary>
+        /// There is no OpenGL/OpenGL ES context attached to this window.
+        /// </summary>
+        NoWindowContext = 0x0001000A
+    }
+}

OpenToolkit.GraphicsLibraryFramework/Enums/InitHintBool.cs

@@ -0,0 +1,46 @@
+//
+// InitHint.cs
+//
+// Copyright (C) 2019 OpenTK
+//
+// This software may be modified and distributed under the terms
+// of the MIT license. See the LICENSE file for details.
+//
+
+namespace OpenToolkit.GraphicsLibraryFramework
+{
+    /// <summary>
+    /// Initialization hints are set before <see cref="GLFW.Init"/> and affect how the library behaves until termination.
+    /// Hints are set with <see cref="GLFW.InitHint(InitHintBool, bool)"/>.
+    /// </summary>
+    public enum InitHintBool
+    {
+        /// <summary>
+        /// Used to specify whether to also expose joystick hats as buttons,
+        /// for compatibility with earlier versions of GLFW that did not have
+        /// <see cref="GLFW.GetJoystickHats"/>.
+        /// Set this with <see cref="GLFW.InitHint(InitHintBool, bool)"/>.
+        /// </summary>
+        JoystickHatButtons = 0x00050001,
+
+        /// <summary>
+        /// Used to specify whether to set the current directory to the application to the Contents/Resources
+        /// subdirectory of the application's bundle, if present.
+        /// Set this with <see cref="GLFW.InitHint(InitHintBool, bool)"/>.
+        /// </summary>
+        /// <remarks>
+        /// Only affects macOS; no effect on other platforms.
+        /// </remarks>
+        CocoaChdirResources = 0x00051001,
+
+        /// <summary>
+        /// Used to specify whether to create a basic menu bar, either from a nib or manually,
+        /// when the first window is created, which is when AppKit is initialized.
+        /// Set this with <see cref="GLFW.InitHint(InitHintBool, bool)"/>.
+        /// </summary>
+        /// <remarks>
+        /// Only affects macOS; no effect on other platforms.
+        /// </remarks>
+        CocoaMenubar = 0x00051002
+    }
+}