GUI: earliest ever GUI

src/gui/fonts.h

@@ -0,0 +1,7 @@
+#ifndef _FONTS_H
+#define _FONTS_H
+extern const unsigned int defFont_main_compressed_size;
+extern const unsigned int defFont_main_compressed_data[];
+extern const unsigned int defFont_pat_compressed_size;
+extern const unsigned int defFont_pat_compressed_data[];
+#endif

src/gui/gui.cpp

@@ -1,9 +1,82 @@
 #include "gui.h"
+#include "fonts.h"
+#include "../ta-log.h"
+#include "imgui.h"
 
 void FurnaceGUI::bindEngine(DivEngine* eng) {
   e=eng;
 }
 
+bool FurnaceGUI::loop() {
+  while (!quit) {
+    SDL_Event ev;
+    while (SDL_PollEvent(&ev)) {
+      ImGui_ImplSDL2_ProcessEvent(&ev);
+      switch (ev.type) {
+        case SDL_QUIT:
+          quit=true;
+          return true;
+          break;
+      }
+    }
+    
+    ImGui_ImplSDLRenderer_NewFrame();
+    ImGui_ImplSDL2_NewFrame(sdlWin);
+    ImGui::NewFrame();
+
+    if (ImGui::Begin("Debug")) {
+      ImGui::Text("Hello world!\n");
+      ImGui::InputScalar("Speed 1",ImGuiDataType_U8,&e->song.speed1);
+      ImGui::InputScalar("Speed 2",ImGuiDataType_U8,&e->song.speed2);
+    }
+    ImGui::End();
+
+    SDL_RenderClear(sdlRend);
+    ImGui::Render();
+    ImGui_ImplSDLRenderer_RenderDrawData(ImGui::GetDrawData());
+    SDL_RenderPresent(sdlRend);
+  }
+  return false;
+}
+
+bool FurnaceGUI::init() {
+  sdlWin=SDL_CreateWindow("Furnace",SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,scrW*dpiScale,scrH*dpiScale,SDL_WINDOW_RESIZABLE|SDL_WINDOW_ALLOW_HIGHDPI);
+  if (sdlWin==NULL) {
+    logE("could not open window!\n");
+    return false;
+  }
+
+  sdlRend=SDL_CreateRenderer(sdlWin,-1,SDL_RENDERER_ACCELERATED|SDL_RENDERER_PRESENTVSYNC|SDL_RENDERER_TARGETTEXTURE);
+
+  if (sdlRend==NULL) {
+    logE("could not init renderer! %s\n",SDL_GetError());
+    return false;
+  }
+
+  IMGUI_CHECKVERSION();
+  ImGui::CreateContext();
+
+  ImGui::StyleColorsDark();
+  ImGui_ImplSDL2_InitForSDLRenderer(sdlWin);
+  ImGui_ImplSDLRenderer_Init(sdlRend);
+
+  ImGui::GetStyle().ScaleAllSizes(dpiScale);
+
+  if ((mainFont=ImGui::GetIO().Fonts->AddFontFromMemoryCompressedTTF(defFont_main_compressed_data,defFont_main_compressed_size,18*dpiScale))==NULL) {
+    logE("could not load UI font!\n");
+    return false;
+  }
+  if ((patFont=ImGui::GetIO().Fonts->AddFontFromMemoryCompressedTTF(defFont_pat_compressed_data,defFont_pat_compressed_size,18*dpiScale))==NULL) {
+    logE("could not load pattern font!\n");
+    return false;
+  }
+  return true;
+}
+
 FurnaceGUI::FurnaceGUI():
-  e(NULL) {
+  e(NULL),
+  quit(false),
+  scrW(1280),
+  scrH(800),
+  dpiScale(2) {
 }

src/gui/gui.h

@@ -1,9 +1,27 @@
 #include "../engine/engine.h"
+#include "imgui.h"
+#include "imgui_impl_sdl.h"
+#include "imgui_impl_sdlrenderer.h"
+#include <SDL.h>
 
 class FurnaceGUI {
   DivEngine* e;
 
+  SDL_Window* sdlWin;
+  SDL_Renderer* sdlRend;
+
+  bool quit;
+
+  int scrW, scrH;
+
+  double dpiScale;
+
+  ImFont* mainFont;
+  ImFont* patFont;
+
   public:
     void bindEngine(DivEngine* eng);
+    bool loop();
+    bool init();
     FurnaceGUI();
 };