protected virtual void Create()
{
ImGuiIO io = ImGui.GetIO();
// Build texture atlas
ImFontTextureData texData = io.FontAtlas.GetTexDataAsAlpha8();
int lastTexture;
GL.GetIntegerv(GL.Enum.GL_TEXTURE_BINDING_2D, out lastTexture);
// Create OpenGL texture
GL.GenTextures(1, out g_FontTexture);
GL.BindTexture(GL.Enum.GL_TEXTURE_2D, g_FontTexture);
GL.TexParameteri(GL.Enum.GL_TEXTURE_2D, GL.Enum.GL_TEXTURE_MIN_FILTER, (int)GL.Enum.GL_LINEAR);
GL.TexParameteri(GL.Enum.GL_TEXTURE_2D, GL.Enum.GL_TEXTURE_MAG_FILTER, (int)GL.Enum.GL_LINEAR);
GL.PixelStorei(GL.Enum.GL_UNPACK_ROW_LENGTH, 0);
GL.TexImage2D(
GL.Enum.GL_TEXTURE_2D,
0,
(int)GL.Enum.GL_ALPHA,
texData.Width,
texData.Height,
0,
GL.Enum.GL_ALPHA,
GL.Enum.GL_UNSIGNED_BYTE,
texData.Pixels
);
// Store the texture identifier in the ImFontAtlas substructure.
io.FontAtlas.SetTexID(g_FontTexture);
io.FontAtlas.ClearTexData(); // Clears CPU side texture data.
GL.BindTexture(GL.Enum.GL_TEXTURE_2D, lastTexture);
}
public void BuildTextureAtlas()
{
ImGuiIO io = ImGui.IO;
// ImFontTextureData texData = io.FontAtlas.GetTexDataAsAlpha8();
// Alpha8 has got some blending issues.
ImFontTextureData texData = io.FontAtlas.GetTexDataAsRGBA32();
Texture2D tex = new Texture2D(Game.GraphicsDevice, texData.Width, texData.Height, false, SurfaceFormat.Color);
int[] data = new int[texData.Width * texData.Height];
Marshal.Copy(texData.Pixels, data, 0, data.Length);
tex.SetData(data);
FontTexture = Register(tex);
io.FontAtlas.SetTexID(FontTexture);
io.FontAtlas.ClearTexData(); // Clears CPU side texture data.
}
