/// <summary>
/// Constructs a new ImGuiController.
/// </summary>
public unsafe ImGuiController(GraphicsDevice gd, Sdl2Window window, OutputDescription outputDescription, int width, int height)
{
_gd = gd;
_window = window;
_windowWidth = width;
_windowHeight = height;
IntPtr context = ImGui.CreateContext();
ImGui.SetCurrentContext(context);
ImGuiIOPtr io = ImGui.GetIO();
io.ConfigFlags |= ImGuiConfigFlags.DockingEnable;
io.ConfigFlags |= ImGuiConfigFlags.ViewportsEnable;
ImGuiPlatformIOPtr platformIO = ImGui.GetPlatformIO();
ImGuiViewportPtr mainViewport = platformIO.MainViewport;
mainViewport.PlatformHandle = window.Handle;
_mainViewportWindow = new VeldridImGuiWindow(gd, mainViewport, _window);
_createWindow = CreateWindow;
_destroyWindow = DestroyWindow;
_getWindowPos = GetWindowPos;
_showWindow = ShowWindow;
_setWindowPos = SetWindowPos;
_setWindowSize = SetWindowSize;
_getWindowSize = GetWindowSize;
_setWindowFocus = SetWindowFocus;
_getWindowFocus = GetWindowFocus;
_getWindowMinimized = GetWindowMinimized;
_setWindowTitle = SetWindowTitle;
platformIO.Platform_CreateWindow = Marshal.GetFunctionPointerForDelegate(_createWindow);
platformIO.Platform_DestroyWindow = Marshal.GetFunctionPointerForDelegate(_destroyWindow);
platformIO.Platform_ShowWindow = Marshal.GetFunctionPointerForDelegate(_showWindow);
platformIO.Platform_SetWindowPos = Marshal.GetFunctionPointerForDelegate(_setWindowPos);
platformIO.Platform_SetWindowSize = Marshal.GetFunctionPointerForDelegate(_setWindowSize);
platformIO.Platform_SetWindowFocus = Marshal.GetFunctionPointerForDelegate(_setWindowFocus);
platformIO.Platform_GetWindowFocus = Marshal.GetFunctionPointerForDelegate(_getWindowFocus);
platformIO.Platform_GetWindowMinimized = Marshal.GetFunctionPointerForDelegate(_getWindowMinimized);
platformIO.Platform_SetWindowTitle = Marshal.GetFunctionPointerForDelegate(_setWindowTitle);
ImGuiNative.ImGuiPlatformIO_Set_Platform_GetWindowPos(platformIO.NativePtr, Marshal.GetFunctionPointerForDelegate(_getWindowPos));
ImGuiNative.ImGuiPlatformIO_Set_Platform_GetWindowSize(platformIO.NativePtr, Marshal.GetFunctionPointerForDelegate(_getWindowSize));
unsafe
{
io.NativePtr->BackendPlatformName = (byte *)new FixedAsciiString("Veldrid.SDL2 Backend").DataPtr;
}
io.BackendFlags |= ImGuiBackendFlags.HasMouseCursors;
io.BackendFlags |= ImGuiBackendFlags.HasSetMousePos;
io.BackendFlags |= ImGuiBackendFlags.PlatformHasViewports;
io.BackendFlags |= ImGuiBackendFlags.RendererHasViewports;
io.Fonts.AddFontDefault();
CreateDeviceResources(gd, outputDescription);
SetKeyMappings();
SetPerFrameImGuiData(1f / 60f);
UpdateMonitors();
ImGui.NewFrame();
_frameBegun = true;
}
/// <summary>
/// Constructs a new ImGuiController.
/// </summary>
public unsafe ImGuiView(GraphicsDevice gd, Sdl2Window window, OutputDescription outputDescription, int width, int height)
{
_gd = gd;
_window = window;
_windowWidth = width;
_windowHeight = height;
IntPtr context = ImGui.CreateContext();
ImGui.SetCurrentContext(context);
ImGuiIOPtr io = ImGui.GetIO();
io.ConfigFlags |= ImGuiConfigFlags.DockingEnable;
io.ConfigFlags |= ImGuiConfigFlags.ViewportsEnable;
ImGuiPlatformIOPtr platformIO = ImGui.GetPlatformIO();
ImGuiViewportPtr mainViewport = platformIO.MainViewport;
mainViewport.PlatformHandle = window.Handle;
_mainViewportWindow = new VeldridImGuiWindow(gd, mainViewport, _window);
_createWindow = CreateWindow;
_destroyWindow = DestroyWindow;
_getWindowPos = GetWindowPos;
_showWindow = ShowWindow;
_setWindowPos = SetWindowPos;
_setWindowSize = SetWindowSize;
_getWindowSize = GetWindowSize;
_setWindowFocus = SetWindowFocus;
_getWindowFocus = GetWindowFocus;
_getWindowMinimized = GetWindowMinimized;
_setWindowTitle = SetWindowTitle;
platformIO.Platform_CreateWindow = Marshal.GetFunctionPointerForDelegate(_createWindow);
platformIO.Platform_DestroyWindow = Marshal.GetFunctionPointerForDelegate(_destroyWindow);
platformIO.Platform_ShowWindow = Marshal.GetFunctionPointerForDelegate(_showWindow);
platformIO.Platform_SetWindowPos = Marshal.GetFunctionPointerForDelegate(_setWindowPos);
platformIO.Platform_SetWindowSize = Marshal.GetFunctionPointerForDelegate(_setWindowSize);
platformIO.Platform_SetWindowFocus = Marshal.GetFunctionPointerForDelegate(_setWindowFocus);
platformIO.Platform_GetWindowFocus = Marshal.GetFunctionPointerForDelegate(_getWindowFocus);
platformIO.Platform_GetWindowMinimized = Marshal.GetFunctionPointerForDelegate(_getWindowMinimized);
platformIO.Platform_SetWindowTitle = Marshal.GetFunctionPointerForDelegate(_setWindowTitle);
ImGuiNative.ImGuiPlatformIO_Set_Platform_GetWindowPos(platformIO.NativePtr, Marshal.GetFunctionPointerForDelegate(_getWindowPos));
ImGuiNative.ImGuiPlatformIO_Set_Platform_GetWindowSize(platformIO.NativePtr, Marshal.GetFunctionPointerForDelegate(_getWindowSize));
unsafe
{
io.NativePtr->BackendPlatformName = (byte *)new FixedAsciiString("Veldrid.SDL2 Backend").DataPtr;
}
io.BackendFlags |= ImGuiBackendFlags.HasMouseCursors;
io.BackendFlags |= ImGuiBackendFlags.HasSetMousePos;
io.BackendFlags |= ImGuiBackendFlags.PlatformHasViewports;
io.BackendFlags |= ImGuiBackendFlags.RendererHasViewports;
io.Fonts.AddFontDefault();
// Create general resources
_gd = gd;
ResourceFactory factory = gd.ResourceFactory;
_vertexBuffer = factory.CreateBuffer(new BufferDescription(10000, BufferUsage.VertexBuffer | BufferUsage.Dynamic));
_vertexBuffer.Name = "ImGui.NET Vertex Buffer";
_indexBuffer = factory.CreateBuffer(new BufferDescription(2000, BufferUsage.IndexBuffer | BufferUsage.Dynamic));
_indexBuffer.Name = "ImGui.NET Index Buffer";
byte *pixels;
int fwidth, fheight, bytesPerPixel;
io.Fonts.GetTexDataAsRGBA32(out pixels, out fwidth, out fheight, out bytesPerPixel);
// Store our identifier
io.Fonts.SetTexID(_fontAtlasID);
_fontTexture = gd.ResourceFactory.CreateTexture(TextureDescription.Texture2D(
(uint)fwidth,
(uint)fheight,
1,
1,
PixelFormat.R8_G8_B8_A8_UNorm,
TextureUsage.Sampled));
_fontTexture.Name = "ImGui.NET Font Texture";
gd.UpdateTexture(
_fontTexture,
(IntPtr)pixels,
(uint)(bytesPerPixel * fwidth * fheight),
0,
0,
0,
(uint)fwidth,
(uint)fheight,
1,
0,
0);
_fontTextureView = gd.ResourceFactory.CreateTextureView(_fontTexture);
io.Fonts.ClearTexData();
_projMatrixBuffer = factory.CreateBuffer(new BufferDescription(64, BufferUsage.UniformBuffer | BufferUsage.Dynamic));
_projMatrixBuffer.Name = "ImGui.NET Projection Buffer";
byte[] vertexShaderBytes = LoadEmbeddedShaderCode(gd.ResourceFactory, "imgui-vertex", ShaderStages.Vertex);
byte[] fragmentShaderBytes = LoadEmbeddedShaderCode(gd.ResourceFactory, "imgui-frag", ShaderStages.Fragment);
_vertexShader = factory.CreateShader(new ShaderDescription(ShaderStages.Vertex, vertexShaderBytes, "main"));
_fragmentShader = factory.CreateShader(new ShaderDescription(ShaderStages.Fragment, fragmentShaderBytes, "main"));
VertexLayoutDescription[] vertexLayouts = new VertexLayoutDescription[]
{
new VertexLayoutDescription(
new VertexElementDescription("in_position", VertexElementSemantic.Position, VertexElementFormat.Float2),
new VertexElementDescription("in_texCoord", VertexElementSemantic.TextureCoordinate, VertexElementFormat.Float2),
new VertexElementDescription("in_color", VertexElementSemantic.Color, VertexElementFormat.Byte4_Norm))
};
_layout = factory.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("ProjectionMatrixBuffer", ResourceKind.UniformBuffer, ShaderStages.Vertex),
new ResourceLayoutElementDescription("MainSampler", ResourceKind.Sampler, ShaderStages.Fragment)));
_textureLayout = factory.CreateResourceLayout(new ResourceLayoutDescription(
new ResourceLayoutElementDescription("MainTexture", ResourceKind.TextureReadOnly, ShaderStages.Fragment)));
GraphicsPipelineDescription pd = new GraphicsPipelineDescription(
BlendStateDescription.SingleAlphaBlend,
new DepthStencilStateDescription(false, false, ComparisonKind.Always),
new RasterizerStateDescription(FaceCullMode.None, PolygonFillMode.Solid, FrontFace.Clockwise, false, true),
PrimitiveTopology.TriangleList,
new ShaderSetDescription(vertexLayouts, new[] { _vertexShader, _fragmentShader }),
new ResourceLayout[] { _layout, _textureLayout },
outputDescription);
_pipeline = factory.CreateGraphicsPipeline(ref pd);
_mainResourceSet = factory.CreateResourceSet(new ResourceSetDescription(_layout,
_projMatrixBuffer,
gd.PointSampler));
_fontTextureResourceSet = factory.CreateResourceSet(new ResourceSetDescription(_textureLayout, _fontTextureView));
SetKeyMappings();
SetPerFrameImGuiData(1f / 60f, width, height);
UpdateMonitors();
ImGui.NewFrame();
_frameBegun = true;
}
