add GDExt example

doc/examples/GDExt/SConstruct

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+
+IMGUI_PATH = "../../../gdext/imgui"
+IMGUI_GODOT_INCLUDE = "../../../addons/imgui-godot/include"
+
+env = SConscript("../../../gdext/godot-cpp/SConstruct")
+env = env.Clone()
+
+env.Append(CPPPATH=["src/"])
+sources = Glob("src/*.cpp")
+
+# Dear ImGui
+sources += Glob(f"{IMGUI_PATH}/*.cpp")
+env.Append(CPPDEFINES=['IMGUI_USER_CONFIG="\\"imconfig-godot.h\\""'])
+env.Append(CPPPATH=[IMGUI_PATH, IMGUI_GODOT_INCLUDE])
+
+if env["platform"] == "macos":
+    library = env.SharedLibrary(
+        "project/bin/libgdexample.{}.{}.framework/libgdexample.{}.{}".format(
+            env["platform"], env["target"], env["platform"], env["target"]
+        ),
+        source=sources,
+    )
+else:
+    library = env.SharedLibrary(
+        "project/bin/libgdexample{}{}".format(env["suffix"], env["SHLIBSUFFIX"]),
+        source=sources,
+    )
+
+Default(library)

doc/examples/GDExt/project/addons.json

@@ -0,0 +1,8 @@
+{
+    "addons": {
+        "imgui-godot": {
+            "url": "../../../../../addons/imgui-godot",
+            "source": "symlink"
+        }
+    }
+}

doc/examples/GDExt/project/example.gdextension

@@ -0,0 +1,13 @@
+[configuration]
+
+entry_symbol = "example_library_init"
+compatibility_minimum = "4.2"
+
+[libraries]
+
+macos.debug = "res://bin/libgdexample.macos.template_debug.framework"
+macos.release = "res://bin/libgdexample.macos.template_release.framework"
+windows.debug.x86_64 = "res://bin/libgdexample.windows.template_debug.x86_64.dll"
+windows.release.x86_64 = "res://bin/libgdexample.windows.template_release.x86_64.dll"
+linux.debug.x86_64 = "res://bin/libgdexample.linux.template_debug.x86_64.so"
+linux.release.x86_64 = "res://bin/libgdexample.linux.template_release.x86_64.so"

doc/examples/GDExt/project/icon.svg.import

@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://cr045l23wjmqc"
+path="res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.svg"
+dest_files=["res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

doc/examples/GDExt/project/main.tscn

@@ -0,0 +1,5 @@
+[gd_scene format=3 uid="uid://c08lt0b17jqog"]
+
+[node name="Node2D" type="Node2D"]
+
+[node name="Example" type="Example" parent="."]

doc/examples/GDExt/project/project.godot

@@ -0,0 +1,24 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="GDExt"
+run/main_scene="res://main.tscn"
+config/features=PackedStringArray("4.2", "Forward Plus")
+config/icon="res://icon.svg"
+
+[autoload]
+
+ImGuiRoot="*res://addons/imgui-godot/data/ImGuiRoot.tscn"
+
+[editor_plugins]
+
+enabled=PackedStringArray("res://addons/imgui-godot/plugin.cfg")

doc/examples/GDExt/src/example.cpp

@@ -0,0 +1,37 @@
+#include "example.h"
+#include <imgui-godot.h>
+
+using namespace godot;
+
+void Example::_bind_methods()
+{
+}
+
+Example::Example()
+{
+}
+
+Example::~Example()
+{
+}
+
+void Example::_ready()
+{
+    ImGui::Godot::SyncImGuiPtrs();
+}
+
+void Example::_process(double delta)
+{
+#ifdef DEBUG_ENABLED
+    if (Engine::get_singleton()->is_editor_hint())
+        return;
+#endif
+
+    static int x = 0;
+
+    ImGui::SetNextWindowSize({200, 200}, ImGuiCond_Once);
+    ImGui::Begin("GDExtension Example");
+    ImGui::DragInt("x", &x);
+    ImGui::Text("x = %d", x);
+    ImGui::End();
+}

doc/examples/GDExt/src/example.h

@@ -0,0 +1,19 @@
+#pragma once
+#include <godot_cpp/classes/node.hpp>
+
+using namespace godot;
+
+class Example : public Node
+{
+    GDCLASS(Example, Node);
+
+protected:
+    static void _bind_methods();
+
+public:
+    Example();
+    ~Example();
+
+    void _ready() override;
+    void _process(double delta) override;
+};

doc/examples/GDExt/src/register_types.cpp

@@ -0,0 +1,42 @@
+#include "register_types.h"
+#include "example.h"
+
+#include <gdextension_interface.h>
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/core/defs.hpp>
+#include <godot_cpp/godot.hpp>
+
+using namespace godot;
+
+void initialize_example_module(ModuleInitializationLevel p_level)
+{
+    if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE)
+    {
+        return;
+    }
+
+    GDREGISTER_CLASS(Example);
+}
+
+void uninitialize_example_module(ModuleInitializationLevel p_level)
+{
+    if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE)
+    {
+        return;
+    }
+}
+
+extern "C" {
+GDExtensionBool GDE_EXPORT example_library_init(GDExtensionInterfaceGetProcAddress p_get_proc_address,
+                                                GDExtensionClassLibraryPtr p_library,
+                                                GDExtensionInitialization* r_initialization)
+{
+    godot::GDExtensionBinding::InitObject init_obj(p_get_proc_address, p_library, r_initialization);
+
+    init_obj.register_initializer(initialize_example_module);
+    init_obj.register_terminator(uninitialize_example_module);
+    init_obj.set_minimum_library_initialization_level(MODULE_INITIALIZATION_LEVEL_SCENE);
+
+    return init_obj.init();
+}
+}

doc/examples/GDExt/src/register_types.h

@@ -0,0 +1,7 @@
+#pragma once
+#include <godot_cpp/core/class_db.hpp>
+
+using namespace godot;
+
+void initialize_example_module(ModuleInitializationLevel p_level);
+void uninitialize_example_module(ModuleInitializationLevel p_level);

gdext/include/imconfig-godot.h

@@ -13,7 +13,7 @@ using godot::Vector2;
 using godot::Vector2i;
 using godot::Vector4;
 
-#ifdef DEBUG_ENABLED
+#if defined(DEBUG_ENABLED) && defined(IGN_EXPORT)
 #ifndef IM_ASSERT
 #include <godot_cpp/variant/utility_functions.hpp>
 #define IM_ASSERT(_EXPR)                                                                                             \

gdext/include/imgui-godot.h

@@ -115,7 +115,7 @@ inline void SetVisible(bool vis)
 
 inline bool ToolInit()
 {
-    ERR_FAIL_COND(!detail::GET_IMGUIGD());
+    ERR_FAIL_COND_V(!detail::GET_IMGUIGD(), false);
     static const StringName sn("ToolInit");
     return detail::ImGuiGD->call(sn);
 }