Update high DPI handling

Author: MartinHelmut

src/core/Core/Application.cpp

@@ -147,9 +147,12 @@ ExitStatus App::Application::run() {
     // Rendering
     ImGui::Render();
 
+    SDL_RenderSetScale(m_window->get_native_renderer(),
+        io.DisplayFramebufferScale.x,
+        io.DisplayFramebufferScale.y);
     SDL_SetRenderDrawColor(m_window->get_native_renderer(), 100, 100, 100, 255);
     SDL_RenderClear(m_window->get_native_renderer());
-    ImGui_ImplSDLRenderer2_RenderDrawData(ImGui::GetDrawData());
+    ImGui_ImplSDLRenderer2_RenderDrawData(ImGui::GetDrawData(), m_window->get_native_renderer());
     SDL_RenderPresent(m_window->get_native_renderer());
   }
 

src/core/Core/Window.cpp

@@ -33,7 +33,6 @@ Window::Window(const Settings& settings) {
 
   SDL_RendererInfo info;
   SDL_GetRendererInfo(m_renderer, &info);
-  DPIHandler::set_render_scale(m_renderer);
 
   APP_DEBUG("Current SDL_Renderer: {}", info.name);
 }

src/core/Platform/Linux/DPIHandler.cpp

@@ -26,11 +26,6 @@ WindowSize DPIHandler::get_dpi_aware_window_size(const Window::Settings& setting
   return {settings.width, settings.height};
 }
 
-void DPIHandler::set_render_scale([[maybe_unused]] SDL_Renderer* renderer) {
-  APP_PROFILE_FUNCTION();
-  // do nothing
-}
-
 void DPIHandler::set_global_font_scaling([[maybe_unused]] ImGuiIO* io) {
   APP_PROFILE_FUNCTION();
   // do nothing

src/core/Platform/Mac/DPIHandler.cpp

@@ -30,13 +30,6 @@ WindowSize DPIHandler::get_dpi_aware_window_size(const Window::Settings& setting
   return {settings.width, settings.height};
 }
 
-void DPIHandler::set_render_scale(SDL_Renderer* renderer) {
-  APP_PROFILE_FUNCTION();
-
-  auto scale{get_scale()};
-  SDL_RenderSetScale(renderer, scale, scale);
-}
-
 void DPIHandler::set_global_font_scaling(ImGuiIO* io) {
   APP_PROFILE_FUNCTION();
 

src/core/Platform/Windows/DPIHandler.cpp

@@ -29,11 +29,6 @@ WindowSize DPIHandler::get_dpi_aware_window_size(const Window::Settings& setting
   return {width, height};
 }
 
-void DPIHandler::set_render_scale([[maybe_unused]] SDL_Renderer* renderer) {
-  APP_PROFILE_FUNCTION();
-  // do nothing
-}
-
 void DPIHandler::set_global_font_scaling([[maybe_unused]] ImGuiIO* io) {
   APP_PROFILE_FUNCTION();
   // do nothing