first commit

src/imgui.cpp

@@ -0,0 +1,45 @@
+#include "imgui.h"
+
+void
+imgui_init(SDL_Window* window, SDL_GLContext glContext)
+{
+	IMGUI_CHECKVERSION();
+
+	ImGui::CreateContext();
+	ImGui::StyleColorsDark();
+
+	ImGui_ImplSDL3_InitForOpenGL(window, glContext);
+	ImGui_ImplOpenGL3_Init(STRING_OPENGL_VERSION);
+
+	printf(STRING_INFO_IMGUI_INIT);
+}
+
+void
+imgui_tick(State* state)
+{
+	ImGui_ImplSDL3_NewFrame();
+	ImGui_ImplOpenGL3_NewFrame();
+	ImGui::NewFrame();
+
+	ImGui::Begin("Hello, world!");
+	ImGui::Text("Color");
+	ImGui::ColorEdit3("Color", value_ptr(state->clearColor));
+	ImGui::End();
+}
+
+void
+imgui_draw(void)
+{
+	ImGui::Render();
+	ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+}
+
+void
+imgui_free(void)
+{
+	ImGui_ImplSDL3_Shutdown();
+	ImGui_ImplOpenGL3_Shutdown();
+	ImGui::DestroyContext();
+
+	printf(STRING_INFO_IMGUI_FREE);
+}