public ImGuiManager(ImGuiOptions options = null)
{
if (options == null)
{
options = new ImGuiOptions();
}
_gameWindowFirstPosition = options._gameWindowFirstPosition;
_gameWindowTitle = options._gameWindowTitle;
_gameWindowFlags = options._gameWindowFlags;
LoadSettings();
_renderer = new ImGuiRenderer(Core.Instance);
_renderer.RebuildFontAtlas(options);
Core.Emitter.AddObserver(CoreEvents.SceneChanged, OnSceneChanged);
NezImGuiThemes.DarkTheme1();
// find all Scenes
_sceneSubclasses = ReflectionUtils.GetAllSubclasses(typeof(ECScene), true);
// tone down indent
ImGui.GetStyle().IndentSpacing = 12;
ImGui.GetIO().ConfigWindowsMoveFromTitleBarOnly = true;
// find all themes
_themes = typeof(NezImGuiThemes).GetMethods(System.Reflection.BindingFlags.Static |
System.Reflection.BindingFlags.Public);
}
/// <summary>
/// Creates a texture and loads the font data from ImGui. Should be called when the <see cref="GraphicsDevice" /> is initialized but before any rendering is done
/// </summary>
public unsafe void RebuildFontAtlas(ImGuiOptions options)
{
// Get font texture from ImGui
var io = ImGui.GetIO();
if (options._includeDefaultFont)
{
DefaultFontPtr = io.Fonts.AddFontDefault();
}
foreach (var font in options._fonts)
{
io.Fonts.AddFontFromFileTTF(font.Item1, font.Item2);
}
io.Fonts.GetTexDataAsRGBA32(out byte *pixelData, out int width, out int height, out int bytesPerPixel);
// Copy the data to a managed array
var pixels = new byte[width * height * bytesPerPixel];
Marshal.Copy(new IntPtr(pixelData), pixels, 0, pixels.Length);
// Create and register the texture as an XNA texture
var tex2d = new Texture2D(Core.GraphicsDevice, width, height, false, SurfaceFormat.Color);
tex2d.SetData(pixels);
// Should a texture already have been built previously, unbind it first so it can be deallocated
if (_fontTextureId.HasValue)
{
UnbindTexture(_fontTextureId.Value);
}
// Bind the new texture to an ImGui-friendly id
_fontTextureId = BindTexture(tex2d);
// Let ImGui know where to find the texture
io.Fonts.SetTexID(_fontTextureId.Value);
io.Fonts.ClearTexData(); // Clears CPU side texture data
}