C++: FreeType demo

pkdawson · Nov 28, 2022 · 8a48fa6 · 8a48fa6
1 parent 42b1bc6
commit 8a48fa6
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Showing 3 changed files with 49 additions and 1 deletion.
diff --git a/doc/cpp-demo/MyGame/Button1.cs b/doc/cpp-demo/MyGame/Button1.cs
@@ -0,0 +1,34 @@
+using Godot;
+using ImGuiGodot;
+using ImGuiNET;
+using System;
+
+public partial class Button1 : Button
+{
+    private IntPtr _freeTypeBuilder = IntPtr.Zero;
+
+    public override void _Ready()
+    {
+        Pressed += OnPressed;
+    }
+
+    private void OnPressed()
+    {
+        ImGuiGD.ResetFonts();
+        ImGuiGD.AddFont(GD.Load<FontFile>("res://Hack-Regular.ttf"), 18);
+        ImGuiGD.RebuildFontAtlas();
+
+        // toggle builder with each click
+        unsafe
+        {
+            ImFontAtlas* atlas = ImGui.GetIO().NativePtr->Fonts;
+            if (_freeTypeBuilder == IntPtr.Zero)
+                _freeTypeBuilder = (IntPtr)atlas->FontBuilderIO;
+
+            if (atlas->FontBuilderIO == null)
+                atlas->FontBuilderIO = (IntPtr*)_freeTypeBuilder;
+            else
+                atlas->FontBuilderIO = null;
+        }
+    }
+}
diff --git a/doc/cpp-demo/MyGame/main.tscn b/doc/cpp-demo/MyGame/main.tscn
@@ -1,4 +1,6 @@
-[gd_scene format=3 uid="uid://d02ytucir7qh2"]
+[gd_scene load_steps=2 format=3 uid="uid://d02ytucir7qh2"]
+
+[ext_resource type="Script" path="res://Button1.cs" id="1_sb8ai"]
 
 [node name="Control" type="Control"]
 layout_mode = 3
@@ -9,3 +11,10 @@ grow_horizontal = 2
 grow_vertical = 2
 
 [node name="MyCppNode" type="MyCppNode" parent="."]
+
+[node name="Button1" type="Button" parent="."]
+layout_mode = 0
+offset_right = 132.0
+offset_bottom = 59.0
+text = "reload font"
+script = ExtResource("1_sb8ai")
diff --git a/doc/cpp-demo/src/MyCppNode.cpp b/doc/cpp-demo/src/MyCppNode.cpp
@@ -3,6 +3,7 @@
 #include <godot_cpp/classes/node.hpp>
 #include <godot_cpp/variant/utility_functions.hpp>
 #include <imgui.h>
+#include <imgui_freetype.h>
 #include <implot.h>
 using namespace godot;
 
@@ -62,6 +63,10 @@ void MyCppNode::_ready()
 
     ImGui::SetCurrentContext((ImGuiContext*)ctx);
     ImGui::SetAllocatorFunctions((ImGuiMemAllocFunc)mem_alloc, (ImGuiMemFreeFunc)mem_free);
+
+    // will be used in the next RebuildFontAtlas
+    ImGui::GetIO().Fonts->FontBuilderIO = ImGuiFreeType::GetBuilderForFreeType();
+
     ImPlot::CreateContext();
     set_process(true);
 }