void RebuildFonts()
{
ImGuiIOPtr io = ImGui.GetIO();
// Default font
ImFontAtlasPtr fonts = io.Fonts;
fonts.Clear();
using (ImFontConfig config = new ImFontConfig())
{
config.SizePixels = 13.0f * uiScale; // ImGui default font size is 13 pixels
config.OversampleH = 1;
fonts.AddFontDefault(config);
}
#if !UNITY_ANDROID
// Icon font
if (iconFont.Length > 0)
{
using (ImFontConfig config = new ImFontConfig())
{
config.MergeMode = true;
if (iconFontMinAdvanceX > 0)
{
config.GlyphMinAdvanceX = iconFontMinAdvanceX;
config.GlyphMaxAdvanceX = iconFontMinAdvanceX;
}
config.PixelSnapH = true;
config.OversampleH = 1;
ushort rangeMin = ushort.Parse(iconRangeMin, NumberStyles.HexNumber);
ushort rangeMax = ushort.Parse(iconRangeMax, NumberStyles.HexNumber);
if (rangeMin != 0 && rangeMax != 0)
{
ushort[] icon_ranges = { rangeMin, rangeMax, 0 };
ImGui.AddFontFromFileTTF(fonts, Application.streamingAssetsPath + "/" + iconFont, iconFontPixelSize * uiScale, config, icon_ranges);
}
}
}
// Custom fonts
imFonts = new ImFontPtr[customFonts.Length];
for (int i = 0; i < customFonts.Length; i++)
{
using (ImFontConfig config = new ImFontConfig())
{
config.OversampleH = 1;
config.OversampleV = 1;
imFonts[i] = fonts.AddFontFromFileTTF(Application.streamingAssetsPath + "/" + customFonts[i], customFontPixelSize * uiScale, config);
}
}
#endif
if (useFreetype)
{
// Freetype rasterizer
ImGui.BuildFontAtlas(fonts, freetype_flags);
}
else
{
fonts.Build();
}
RecreateFontTexture();
}
public unsafe IconFont(GraphicsDevice device, Action <ImFontAtlasPtr> addFontToAtlas)
{
var atlas = new ImFontAtlasPtr(ImGuiNative.ImFontAtlas_ImFontAtlas());
addFontToAtlas(atlas);
atlas.Flags = ImFontAtlasFlags.NoMouseCursors;
if (!atlas.Build())
{
throw new InvalidProgramException("Building ImFontAtlas failed");
}
if (atlas.Fonts.Size != 1)
{
throw new InvalidProgramException("ImFontAtlas does not contain a font after building");
}
var font = *(ImFont **)atlas.Fonts.Data.ToPointer();
if (font->Glyphs.Size <= 0)
{
throw new InvalidProgramException("ImFont does not contain at least one glyph after building");
}
IntPtr texPixels;
int texWidth, texHeight;
atlas.GetTexDataAsAlpha8(out texPixels, out texWidth, out texHeight);
Texture = device.ResourceFactory.CreateTexture(new TextureDescription(
width: (uint)texWidth,
height: (uint)texHeight,
format: PixelFormat.R8_UNorm,
usage: TextureUsage.Sampled,
type: TextureType.Texture2D,
depth: 1,
mipLevels: 1,
arrayLayers: 1));
Texture.Name = "IconFontTexture";
device.UpdateTexture(Texture, texPixels, (uint)(texWidth * texHeight * 1), 0, 0, 0, (uint)texWidth, (uint)texHeight, 1, 0, 0);
var glyphsPtr = (ImFontGlyph *)font->Glyphs.Data.ToPointer();
var glyphs = new Dictionary <string, Rect>();
for (int i = 0; i < font->Glyphs.Size; i++)
{
var glyph = new ImFontGlyphPtr(glyphsPtr + i);
var uvMin = new Vector2(glyph.U0, glyph.V1); // switch v to prevent vflip
var uvMax = new Vector2(glyph.U1, glyph.V0);
var codepoint = (int)(glyph.Codepoint);
glyphs[char.ConvertFromUtf32(codepoint)] = new Rect((uvMin + uvMax) / 2, uvMax - uvMin);
}
Glyphs = glyphs;
atlas.Destroy();
Sampler = device.ResourceFactory.CreateSampler(new SamplerDescription(
addressModeU: SamplerAddressMode.Border,
addressModeV: SamplerAddressMode.Border,
addressModeW: SamplerAddressMode.Border,
filter: SamplerFilter.MinLinear_MagLinear_MipLinear,
comparisonKind: null,
maximumAnisotropy: 0,
minimumLod: 0,
maximumLod: 1,
lodBias: 0,
borderColor: SamplerBorderColor.TransparentBlack
));
}
