Allegro 5 example: main.cpp matches other examples. added window title.

examples/README.txt

@@ -4,11 +4,10 @@ I choose to provide Visual Studio 10 .sln files and Makefile for Linux/OSX.
 Please let me know if they don't work with your setup!
 You can probably just import the .cpp files into your own system and figure out the linkage from there.
 
-
 opengl_example/
     OpenGL example, using GLFW + fixed pipeline.
     This is simple and should work for all OpenGL enabled applications.
-    Prefer following this example since it is the shortest one!
+    Prefer following this example to learn how ImGui works, because it is the simplest shortest one!
 
 opengl3_example/
     OpenGL example, using GLFW/GL3W + programmable pipeline.
@@ -28,3 +27,6 @@ ios_example/
 
 sdl_opengl_example/
 	SDL2 + OpenGL example.
+
+allegro5_example/
+	Allegro 5 example.

examples/allegro5_example/imgui_impl_a5.cpp

@@ -1,7 +1,6 @@
 // ImGui Allegro 5 bindings
-// by @birthggd
-// public domain
 // https://github.com/ocornut/imgui
+// by @birthggd, public domain
 
 #include <stdint.h>     // uint64_t
 #include <cstring>      // memcpy

examples/allegro5_example/imgui_impl_a5.h

@@ -1,16 +1,18 @@
-// public domain
+// ImGui Allegro 5 bindings
+// https://github.com/ocornut/imgui
+// by @birthggd, public domain
 
 #pragma once
 
 struct ALLEGRO_DISPLAY;
 union ALLEGRO_EVENT;
 
-bool ImGui_ImplA5_Init(ALLEGRO_DISPLAY *disp);
+bool    ImGui_ImplA5_Init(ALLEGRO_DISPLAY* display);
-void ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT *ev);
+void    ImGui_ImplA5_Shutdown();
-void ImGui_ImplA5_Shutdown();
+void    ImGui_ImplA5_NewFrame();
 
-void ImGui_ImplA5_NewFrame();
+void    ImGui_ImplA5_ProcessEvent(ALLEGRO_EVENT* event);
-
-bool Imgui_ImplA5_CreateDeviceObjects();
-void ImGui_ImplA5_InvalidateDeviceObjects();
 
+// Use if you want to reset your rendering device without losing ImGui state.
+bool    Imgui_ImplA5_CreateDeviceObjects();
+void    ImGui_ImplA5_InvalidateDeviceObjects();

examples/allegro5_example/main.cpp

@@ -1,3 +1,4 @@
+// ImGui - standalone example application for Allegro 5
 // public domain
 
 #include <stdint.h>
@@ -6,75 +7,85 @@
 #include <imgui.h>
 #include "imgui_impl_a5.h"
 
-int main(int argc, char **argv)
+int main(int, char**)
 {
-  ALLEGRO_DISPLAY *disp;
+    // Setup Allegro 
-  ALLEGRO_EVENT_QUEUE *queue;
+    al_init();
+    al_install_keyboard();
+    al_install_mouse();
+    al_init_primitives_addon();
+    ALLEGRO_DISPLAY* display = al_create_display(1280, 720);
+    al_set_window_title(display, "ImGui Allegro 5 example");
+    ALLEGRO_EVENT_QUEUE* queue = al_create_event_queue();
+    al_register_event_source(queue, al_get_display_event_source(display));
+    al_register_event_source(queue, al_get_keyboard_event_source());
+    al_register_event_source(queue, al_get_mouse_event_source());
 
-  al_init();
+    // Setup ImGui binding
-  al_install_keyboard();
+    ImGui_ImplA5_Init(display);
-  al_install_mouse();
+    //ImGuiIO& io = ImGui::GetIO();
+    //ImFont* my_font0 = io.Fonts->AddFontDefault();
+    //ImFont* my_font1 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
+    //ImFont* my_font2 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/Karla-Regular.ttf", 16.0f);
+    //ImFont* my_font3 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyClean.ttf", 13.0f); my_font3->DisplayOffset.y += 1;
+    //ImFont* my_font4 = io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyTiny.ttf", 10.0f); my_font4->DisplayOffset.y += 1;
+    //ImFont* my_font5 = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, io.Fonts->GetGlyphRangesJapanese());
 
-  al_init_primitives_addon();
+    bool show_test_window = true;
-
+    bool show_another_window = false;
-  //al_set_new_display_option(ALLEGRO_VSYNC, 1, ALLEGRO_DONTCARE);
+    ImVec4 clear_color = ImColor(114, 144, 154);
-  disp = al_create_display(1280, 800);
-
-  queue = al_create_event_queue();
-  al_register_event_source(queue, al_get_display_event_source(disp));
-  al_register_event_source(queue, al_get_keyboard_event_source());
-  al_register_event_source(queue, al_get_mouse_event_source());
-
-  ImGui_ImplA5_Init(disp);
-
-  bool show_test_window = true;
-  bool show_another_window = false;
-  ImVec4 clear_color = ImColor(114, 144, 154);
-
-  bool running = true;
-  while (running) {
-
-    ALLEGRO_EVENT ev;
-    while (al_get_next_event(queue, &ev)) {
-      ImGui_ImplA5_ProcessEvent(&ev);
-      if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) running = false;
-    }
-
-    ImGui_ImplA5_NewFrame();
 
+    // Main loop
+    bool running = true;
+    while (running) 
     {
-      static float f;
+        ALLEGRO_EVENT ev;
-      ImGui::Text("Hello, world!");
+        while (al_get_next_event(queue, &ev))
-      ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
+        {
-      ImGui::ColorEdit3("clear color", (float*)&clear_color);
+            ImGui_ImplA5_ProcessEvent(&ev);
-      if (ImGui::Button("Test Window")) show_test_window ^= 1;
+            if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) running = false;
-      if (ImGui::Button("Another Window")) show_another_window ^= 1;
+        }
-      ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f/ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
+        ImGui_ImplA5_NewFrame();
 
+        // 1. Show a simple window
+        // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
+        {
+            static float f;
+            ImGui::Text("Hello, world!");
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
+            ImGui::ColorEdit3("clear color", (float*)&clear_color);
+            if (ImGui::Button("Test Window")) show_test_window ^= 1;
+            if (ImGui::Button("Another Window")) show_another_window ^= 1;
+            ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f/ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
+
+        }
+
+        // 2. Show another simple window, this time using an explicit Begin/End pair
+        if (show_another_window) 
+        {
+            ImGui::SetNextWindowSize(ImVec2(200, 100), ImGuiSetCond_FirstUseEver);
+            ImGui::Begin("Another Window", &show_another_window);
+            ImGui::Text("Hello");
+            ImGui::End();
+        }
+
+        // 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
+        if (show_test_window) 
+        {
+            ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver);
+            ImGui::ShowTestWindow(&show_test_window);
+        }
+
+        // Rendering
+        al_clear_to_color(al_map_rgba_f(clear_color.x, clear_color.y, clear_color.z, clear_color.w));
+        ImGui::Render();
+        al_flip_display();
     }
 
-    if (show_another_window) {
+    // Cleanup
-      ImGui::SetNextWindowSize(ImVec2(200, 100), ImGuiSetCond_FirstUseEver);
+    ImGui_ImplA5_Shutdown();
-      ImGui::Begin("Another Window", &show_another_window);
+    al_destroy_event_queue(queue);
-      ImGui::Text("Hello");
+    al_destroy_display(display);
-      ImGui::End();
-    }
 
-    if (show_test_window) {
+    return 0;
-      ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver);
-      ImGui::ShowTestWindow(&show_test_window);
-    }
- 
-    al_clear_to_color(al_map_rgba_f(clear_color.x, clear_color.y, clear_color.z, clear_color.w));
-    ImGui::Render();
-    al_flip_display();
-  }
-
-  ImGui_ImplA5_Shutdown();
-
-  al_destroy_event_queue(queue);
-  al_destroy_display(disp);
-
-  return 0;
 }
-