private static void Main(string[] args)
{
var platform = "x64";
if (IntPtr.Size == 4)
{
platform = "x86";
}
NativeMethods.LoadLibrary($"{platform}/SDL2.dll");
Bgfx.InitializeLibrary();
ushort resolutionWidth = 800;
ushort resolutionHeight = 600;
var windowhandle = SDL.SDL_CreateWindow("hello", 10, 10, resolutionWidth, resolutionHeight,
SDL.SDL_WindowFlags.SDL_WINDOW_ALLOW_HIGHDPI);
var wm = new SDL.SDL_SysWMinfo();
SDL.SDL_GetWindowWMInfo(windowhandle, ref wm);
Bgfx.SetPlatformData(wm.info.win.window);
var init = Bgfx.Initialize(resolutionWidth, resolutionHeight, Bgfx.RendererType.DIRECT_3D11);
ImGui.SetCurrentContext(ImGui.CreateContext());
var IO = ImGui.GetIO();
IO.ImeWindowHandle = wm.info.win.window;
//IO.BackendFlags |= ImGuiBackendFlags.HasMouseCursors; // We can honor GetMouseCursor() values (optional)
//IO.BackendFlags |= ImGuiBackendFlags.HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
//IO.BackendPlatformName = new NullTerminatedString("imgui_impl_win32".ToCharArray());
IO.KeyMap[(int)ImGuiKey.Tab] = (int)SDL.SDL_Scancode.SDL_SCANCODE_TAB;
IO.KeyMap[(int)ImGuiKey.LeftArrow] = (int)SDL.SDL_Scancode.SDL_SCANCODE_LEFT;
IO.KeyMap[(int)ImGuiKey.RightArrow] = (int)SDL.SDL_Scancode.SDL_SCANCODE_RIGHT;
IO.KeyMap[(int)ImGuiKey.UpArrow] = (int)SDL.SDL_Scancode.SDL_SCANCODE_UP;
IO.KeyMap[(int)ImGuiKey.DownArrow] = (int)SDL.SDL_Scancode.SDL_SCANCODE_DOWN;
IO.KeyMap[(int)ImGuiKey.PageUp] = (int)SDL.SDL_Scancode.SDL_SCANCODE_PAGEUP;
IO.KeyMap[(int)ImGuiKey.PageDown] = (int)SDL.SDL_Scancode.SDL_SCANCODE_PAGEDOWN;
IO.KeyMap[(int)ImGuiKey.Home] = (int)SDL.SDL_Scancode.SDL_SCANCODE_HOME;
IO.KeyMap[(int)ImGuiKey.End] = (int)SDL.SDL_Scancode.SDL_SCANCODE_END;
IO.KeyMap[(int)ImGuiKey.Insert] = (int)SDL.SDL_Scancode.SDL_SCANCODE_INSERT;
IO.KeyMap[(int)ImGuiKey.Delete] = (int)SDL.SDL_Scancode.SDL_SCANCODE_DELETE;
IO.KeyMap[(int)ImGuiKey.Backspace] = (int)SDL.SDL_Scancode.SDL_SCANCODE_BACKSPACE;
IO.KeyMap[(int)ImGuiKey.Space] = (int)SDL.SDL_Scancode.SDL_SCANCODE_SPACE;
IO.KeyMap[(int)ImGuiKey.Enter] = (int)SDL.SDL_Scancode.SDL_SCANCODE_KP_ENTER;
IO.KeyMap[(int)ImGuiKey.Escape] = (int)SDL.SDL_Scancode.SDL_SCANCODE_ESCAPE;
IO.KeyMap[(int)ImGuiKey.KeyPadEnter] = (int)SDL.SDL_Scancode.SDL_SCANCODE_RETURN;
IO.KeyMap[(int)ImGuiKey.A] = (int)SDL.SDL_Scancode.SDL_SCANCODE_A;
IO.KeyMap[(int)ImGuiKey.C] = (int)SDL.SDL_Scancode.SDL_SCANCODE_C;
IO.KeyMap[(int)ImGuiKey.V] = (int)SDL.SDL_Scancode.SDL_SCANCODE_V;
IO.KeyMap[(int)ImGuiKey.X] = (int)SDL.SDL_Scancode.SDL_SCANCODE_X;
IO.KeyMap[(int)ImGuiKey.Y] = (int)SDL.SDL_Scancode.SDL_SCANCODE_Y;
IO.KeyMap[(int)ImGuiKey.Z] = (int)SDL.SDL_Scancode.SDL_SCANCODE_Z;
IO.Fonts.AddFontDefault();
IO.Fonts.GetTexDataAsRGBA32(out IntPtr pixels, out var fwidth, out var fheight);
IO.Fonts.SetTexID(new IntPtr(Bgfx.CreateTexture2D((ushort)fwidth, (ushort)fheight, false, 1,
(Bgfx.TextureFormat)Bgfx.TextureFormat.RGBA8,
(Bgfx.SamplerFlags.U_CLAMP | Bgfx.SamplerFlags.V_CLAMP | Bgfx.SamplerFlags.MIN_POINT |
Bgfx.SamplerFlags.MAG_POINT | Bgfx.SamplerFlags.MIP_POINT),
Bgfx.MakeRef(pixels, (uint)(4 * fwidth * fheight))).Idx));
Bgfx.SetViewClear(0, (ushort)(Bgfx.ClearFlags.COLOR | Bgfx.ClearFlags.DEPTH), 0x6495edff, 0, 0);
Bgfx.SetViewMode(0, Bgfx.ViewMode.SEQUENTIAL);
Bgfx.SetViewMode(255, Bgfx.ViewMode.SEQUENTIAL);
Bgfx.SetDebug(Bgfx.DebugFlags.NONE);
Bgfx.Reset(resolutionWidth, resolutionHeight, Bgfx.ResetFlags.VSYNC | Bgfx.ResetFlags.MSAA_X4, init.format);
var running = true;
var bgfxcaps = Bgfx.GetCaps();
mtxOrtho(out var ortho, 0, resolutionWidth, resolutionHeight, 0, 0, 1000.0f, 0, bgfxcaps.Homogenousdepth);
var ImguiVertexLayout = new Bgfx.VertexLayout();
ImguiVertexLayout.Begin(Bgfx.RendererType.NOOP);
ImguiVertexLayout.Add(Bgfx.Attrib.POSITION, Bgfx.AttribType.FLOAT, 2, false, false);
ImguiVertexLayout.Add(Bgfx.Attrib.TEX_COORD0, Bgfx.AttribType.FLOAT, 2, false, false);
ImguiVertexLayout.Add(Bgfx.Attrib.COLOR0, Bgfx.AttribType.UINT8, 4, true, false);
ImguiVertexLayout.End();
var WhitePixelTexture = Bgfx.CreateTexture2D(1, 1, false, 1, Bgfx.TextureFormat.RGBA8, Bgfx.SamplerFlags.V_CLAMP | Bgfx.SamplerFlags.U_CLAMP | Bgfx.SamplerFlags.MIN_POINT | Bgfx.SamplerFlags.MAG_POINT | Bgfx.SamplerFlags.MIP_POINT, new uint[] { 0x0000ffff });
var TextureUniform = Bgfx.CreateUniform("s_texture", Bgfx.UniformType.SAMPLER, 1);
var ImGuiShader = LoadEffect("vs_imgui.bin", "fs_imgui.bin");
while (running)
{
SDL.SDL_PollEvent(out var Event);
if (Event.window.type == SDL.SDL_EventType.SDL_QUIT)
{
running = false;
}
var mouseState = SDL.SDL_GetMouseState(out var mouseX, out var mouseY);
IO.MouseDown[0] = (mouseState & SDL.SDL_BUTTON(SDL.SDL_BUTTON_LEFT)) != 0;
IO.MouseDown[1] = (mouseState & SDL.SDL_BUTTON(SDL.SDL_BUTTON_RIGHT)) != 0;
IO.MouseDown[2] = (mouseState & SDL.SDL_BUTTON(SDL.SDL_BUTTON_MIDDLE)) != 0;
SDL.SDL_GetWindowPosition(windowhandle, out var wx, out var wy);
SDL.SDL_GetGlobalMouseState(out mouseX, out mouseY);
mouseX -= wx;
mouseY -= wy;
IO.MousePosPrev = IO.MousePos;
IO.MousePos = new Vector2(mouseX, mouseY);
ImGui.NewFrame();
//ImGui.SetNextWindowSize(new Vector2(200);
if (ImGui.Begin("test"))
{
if (ImGui.Button("click OS popup"))
{
SDL.SDL_ShowSimpleMessageBox(SDL.SDL_MessageBoxFlags.SDL_MESSAGEBOX_INFORMATION, "Cliked Button", "Click Message", windowhandle);
}
if (ImGui.Button("modal popup"))
{
ImGui.OpenPopup("modal popup");
}
ImGui.Text("Hello");
if (ImGui.BeginPopupModal("modal popup"))
{
if (ImGui.Button("clicked"))
{
ImGui.CloseCurrentPopup();
}
ImGui.EndPopup();
}
}
ImGui.End();
ImGui.EndFrame();
ImGui.Render();
Bgfx.SetViewRect(0, 0, 0, resolutionWidth, resolutionHeight);
Bgfx.SetViewRect(255, 0, 0, resolutionWidth, resolutionHeight);
IO.DisplaySize = new Vector2(resolutionWidth, resolutionHeight);
IO.DisplayFramebufferScale = new Vector2(1);
Bgfx.Touch(0);
{
var drawdata = ImGui.GetDrawData();
ushort viewID = 0;
Bgfx.SetViewTransform(viewID, null, ortho);
{
// Render command lists
for (int ii = 0, num = drawdata.CmdListsCount; ii < num; ++ii)
{
var drawList = drawdata.CmdListsRange[ii];
var numVertices = drawList.VtxBuffer.Size;
var numIndices = drawList.IdxBuffer.Size;
var tib = Bgfx.AllocateTransientIndexBuffer((uint)numIndices);
var tvb = Bgfx.AllocateTransientVertexBuffer((uint)numVertices, ImguiVertexLayout);
tvb.CopyIntoBuffer(drawList.VtxBuffer.Data,
(uint)numVertices * (uint)Unsafe.SizeOf <ImDrawVert>());
tib.CopyIntoBuffer(drawList.IdxBuffer.Data,
(uint)numIndices * (uint)Unsafe.SizeOf <ushort>());
uint offset = 0;
for (int i = 0; i < drawList.CmdBuffer.Size; i++)
{
var cmd = drawList.CmdBuffer[i];
if (cmd.UserCallback != IntPtr.Zero)
{
// cmd->UserCallback(drawList, cmd);
}
else if (cmd.ElemCount > 0)
{
var state = Bgfx.StateFlags.WRITE_RGB
| Bgfx.StateFlags.WRITE_A
| Bgfx.StateFlags.MSAA
;
var texHandle = new Bgfx.TextureHandle();
if (cmd.TextureId.ToInt32() != 0)
{
texHandle.Idx = (ushort)cmd.TextureId.ToInt32();
}
else
{
texHandle.Idx = WhitePixelTexture.Idx;
}
state |= Bgfx.STATE_BLEND_FUNC(Bgfx.StateFlags.BLEND_SRC_ALPHA, Bgfx.StateFlags.BLEND_INV_SRC_ALPHA);
ushort xx = (ushort)((cmd.ClipRect.X > 0.0f ? cmd.ClipRect.X : 0.0f));
ushort yy = (ushort)((cmd.ClipRect.Y > 0.0f ? cmd.ClipRect.Y : 0.0f));
ushort zz = (ushort)((cmd.ClipRect.Z > 65535.0f ? 65535.0f : cmd.ClipRect.Z) - xx);
ushort ww = (ushort)((cmd.ClipRect.W > 65535.0f ? 65535.0f : cmd.ClipRect.W) - yy);
Bgfx.SetScissor(xx, yy, zz, ww);
Bgfx.SetState(state, 0);
Bgfx.SetTexture(0, TextureUniform, texHandle);
Bgfx.SetTransientVertexBuffer(0, tvb, 0, (uint)numVertices);
Bgfx.SetTransientIndexBuffer(tib, offset, cmd.ElemCount);
Bgfx.Submit(viewID, ImGuiShader.program, 0, false);
}
offset += cmd.ElemCount;
}
}
}
}
Bgfx.Frame(false);
}
}
