Use SDL for ImGui

.clang-format

@@ -41,6 +41,7 @@ IndentCaseBlocks: true
 InsertNewlineAtEOF: true
 MacroBlockBegin: ''
 MacroBlockEnd: ''
+SortIncludes: Never
 MaxEmptyLinesToKeep: 2
 NamespaceIndentation: Inner
 SpaceInEmptyParentheses: false

external/imgui/CMakeLists.txt

@@ -0,0 +1,10 @@
+project(imgui)
+
+file(GLOB SOURCES *.cpp)
+file(GLOB HEADERS *.h)
+
+list(APPEND SOURCES backends/imgui_impl_sdl3.cpp backends/imgui_impl_vulkan.cpp)
+
+add_library(imgui ${SOURCES} ${HEADERS})
+target_include_directories(imgui PRIVATE . backends ../SDL/include)
+target_compile_definitions(imgui PUBLIC IMGUI_IMPL_VULKAN_USE_VOLK)

src/frontend/CMakeLists.txt

@@ -36,6 +36,8 @@ include_directories(
   ../../external/parallel-rdp/parallel-rdp-standalone/util
   ../../external/unarr
   ../../external/SDL/include
+  ../../external/imgui
+  ../../external/imgui/backends
 )
 
 option(RAPIDJSON_BUILD_DOC "Build rapidjson documentation." OFF)

src/frontend/RenderWidget.hpp

@@ -6,6 +6,12 @@
 #include <QWidget>
 #include <QWindow>
 
+#include <imgui.h>
+#include <imgui_impl_sdl3.h>
+#include <imgui_impl_vulkan.h>
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_vulkan.h>
+
 struct QtInstanceFactory : Vulkan::InstanceFactory {
   VkInstance create_instance(const VkInstanceCreateInfo *info) override {
     qVkInstance.setApiVersion({1, 3, 0});