Remove SampleApp and convert HelloWorld to sk_app

There is still a large amount of views code that could be trimmed down,
but which is used to implement samples (in viewer). Seemed simpler to
remove some of this code in pieces.

Bug: skia:
Change-Id: Ia3415060d03c8de604a154e3dc38379b754daab6
Reviewed-on: https://skia-review.googlesource.com/72801
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

6 files changed, 682 insertions, 0 deletions

diff --git a/tools/sk_app/mac/GLWindowContext_mac.cpp b/tools/sk_app/mac/GLWindowContext_mac.cpp
new file mode 100644
index 0000000000..7f09d54522
--- /dev/null
+++ b/tools/sk_app/mac/GLWindowContext_mac.cpp
@@ -0,0 +1,109 @@
+
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <OpenGL/gl.h>
+#include "../GLWindowContext.h"
+#include "SDL.h"
+#include "WindowContextFactory_mac.h"
+#include "gl/GrGLInterface.h"
+
+using sk_app::DisplayParams;
+using sk_app::window_context_factory::MacWindowInfo;
+using sk_app::GLWindowContext;
+
+namespace {
+
+class GLWindowContext_mac : public GLWindowContext {
+public:
+    GLWindowContext_mac(const MacWindowInfo&, const DisplayParams&);
+
+    ~GLWindowContext_mac() override;
+
+    void onSwapBuffers() override;
+
+    sk_sp<const GrGLInterface> onInitializeContext() override;
+    void onDestroyContext() override;
+
+private:
+    SDL_Window*   fWindow;
+    SDL_GLContext fGLContext;
+
+    typedef GLWindowContext INHERITED;
+};
+
+GLWindowContext_mac::GLWindowContext_mac(const MacWindowInfo& info, const DisplayParams& params)
+    : INHERITED(params)
+    , fWindow(info.fWindow)
+    , fGLContext(nullptr) {
+
+    // any config code here (particularly for msaa)?
+
+    this->initializeContext();
+}
+
+GLWindowContext_mac::~GLWindowContext_mac() {
+    this->destroyContext();
+}
+
+sk_sp<const GrGLInterface> GLWindowContext_mac::onInitializeContext() {
+    SkASSERT(fWindow);
+
+    fGLContext = SDL_GL_CreateContext(fWindow);
+    if (!fGLContext) {
+        SkDebugf("%s\n", SDL_GetError());
+        return nullptr;
+    }
+
+    if (0 == SDL_GL_MakeCurrent(fWindow, fGLContext)) {
+        glClearStencil(0);
+        glClearColor(0, 0, 0, 0);
+        glStencilMask(0xffffffff);
+        glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
+
+        SDL_GL_GetAttribute(SDL_GL_STENCIL_SIZE, &fStencilBits);
+        SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &fSampleCount);
+
+        SDL_GetWindowSize(fWindow, &fWidth, &fHeight);
+        glViewport(0, 0, fWidth, fHeight);
+    } else {
+        SkDebugf("MakeCurrent failed: %s\n", SDL_GetError());
+    }
+    return sk_sp<const GrGLInterface>(GrGLCreateNativeInterface());
+}
+
+void GLWindowContext_mac::onDestroyContext() {
+    if (!fWindow || !fGLContext) {
+        return;
+    }
+    SDL_GL_DeleteContext(fGLContext);
+    fGLContext = nullptr;
+}
+
+
+void GLWindowContext_mac::onSwapBuffers() {
+    if (fWindow && fGLContext) {
+        SDL_GL_SwapWindow(fWindow);
+    }
+}
+
+}  // anonymous namespace
+
+namespace sk_app {
+namespace window_context_factory {
+
+WindowContext* NewGLForMac(const MacWindowInfo& info, const DisplayParams& params) {
+    WindowContext* ctx = new GLWindowContext_mac(info, params);
+    if (!ctx->isValid()) {
+        delete ctx;
+        return nullptr;
+    }
+    return ctx;
+}
+
+}  // namespace window_context_factory
+}  // namespace sk_app
diff --git a/tools/sk_app/mac/RasterWindowContext_mac.cpp b/tools/sk_app/mac/RasterWindowContext_mac.cpp
new file mode 100644
index 0000000000..409c49f218
--- /dev/null
+++ b/tools/sk_app/mac/RasterWindowContext_mac.cpp
@@ -0,0 +1,136 @@
+
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <OpenGL/gl.h>
+#include "../GLWindowContext.h"
+#include "SDL.h"
+#include "SkCanvas.h"
+#include "SkColorFilter.h"
+#include "WindowContextFactory_mac.h"
+#include "gl/GrGLInterface.h"
+#include "sk_tool_utils.h"
+
+using sk_app::DisplayParams;
+using sk_app::window_context_factory::MacWindowInfo;
+using sk_app::GLWindowContext;
+
+namespace {
+
+// We use SDL to support Mac windowing mainly for convenience's sake. However, it
+// does not allow us to support a purely raster backend because we have no hooks into
+// the NSWindow's drawRect: method. Hence we use GL to handle the update. Should we
+// want to avoid this, we will probably need to write our own windowing backend.
+
+class RasterWindowContext_mac : public GLWindowContext {
+public:
+    RasterWindowContext_mac(const MacWindowInfo&, const DisplayParams&);
+
+    ~RasterWindowContext_mac() override;
+
+    sk_sp<SkSurface> getBackbufferSurface() override;
+
+    void onSwapBuffers() override;
+
+    sk_sp<const GrGLInterface> onInitializeContext() override;
+    void onDestroyContext() override;
+
+private:
+    SDL_Window*   fWindow;
+    SDL_GLContext fGLContext;
+    sk_sp<SkSurface> fBackbufferSurface;
+
+    typedef GLWindowContext INHERITED;
+};
+
+RasterWindowContext_mac::RasterWindowContext_mac(const MacWindowInfo& info,
+                                                 const DisplayParams& params)
+    : INHERITED(params)
+    , fWindow(info.fWindow)
+    , fGLContext(nullptr) {
+
+    // any config code here (particularly for msaa)?
+
+    this->initializeContext();
+}
+
+RasterWindowContext_mac::~RasterWindowContext_mac() {
+    this->destroyContext();
+}
+
+sk_sp<const GrGLInterface> RasterWindowContext_mac::onInitializeContext() {
+    SkASSERT(fWindow);
+
+    fGLContext = SDL_GL_CreateContext(fWindow);
+    if (!fGLContext) {
+        SkDebugf("%s\n", SDL_GetError());
+        return nullptr;
+    }
+
+    if (0 == SDL_GL_MakeCurrent(fWindow, fGLContext)) {
+        glClearStencil(0);
+        glClearColor(0, 0, 0, 0);
+        glStencilMask(0xffffffff);
+        glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
+
+        SDL_GL_GetAttribute(SDL_GL_STENCIL_SIZE, &fStencilBits);
+        SDL_GL_GetAttribute(SDL_GL_MULTISAMPLESAMPLES, &fSampleCount);
+
+        SDL_GetWindowSize(fWindow, &fWidth, &fHeight);
+        glViewport(0, 0, fWidth, fHeight);
+    } else {
+        SkDebugf("MakeCurrent failed: %s\n", SDL_GetError());
+    }
+
+    // make the offscreen image
+    SkImageInfo info = SkImageInfo::Make(fWidth, fHeight, fDisplayParams.fColorType,
+                                         kPremul_SkAlphaType, fDisplayParams.fColorSpace);
+    fBackbufferSurface = SkSurface::MakeRaster(info);
+    return sk_sp<const GrGLInterface>(GrGLCreateNativeInterface());
+}
+
+void RasterWindowContext_mac::onDestroyContext() {
+    if (!fWindow || !fGLContext) {
+        return;
+    }
+    fBackbufferSurface.reset(nullptr);
+    SDL_GL_DeleteContext(fGLContext);
+    fGLContext = nullptr;
+}
+
+sk_sp<SkSurface> RasterWindowContext_mac::getBackbufferSurface() { return fBackbufferSurface; }
+
+void RasterWindowContext_mac::onSwapBuffers() {
+    if (fWindow && fGLContext) {
+        // We made/have an off-screen surface. Get the contents as an SkImage:
+        sk_sp<SkImage> snapshot = fBackbufferSurface->makeImageSnapshot();
+
+        sk_sp<SkSurface> gpuSurface = INHERITED::getBackbufferSurface();
+        SkCanvas* gpuCanvas = gpuSurface->getCanvas();
+        gpuCanvas->drawImage(snapshot, 0, 0);
+        gpuCanvas->flush();
+
+        SDL_GL_SwapWindow(fWindow);
+    }
+}
+
+}  // anonymous namespace
+
+namespace sk_app {
+namespace window_context_factory {
+
+WindowContext* NewRasterForMac(const MacWindowInfo& info, const DisplayParams& params) {
+    WindowContext* ctx = new RasterWindowContext_mac(info, params);
+    if (!ctx->isValid()) {
+        delete ctx;
+        return nullptr;
+    }
+    return ctx;
+}
+
+}  // namespace window_context_factory
+}  // namespace sk_app
diff --git a/tools/sk_app/mac/WindowContextFactory_mac.h b/tools/sk_app/mac/WindowContextFactory_mac.h
new file mode 100644
index 0000000000..3adc68bbc2
--- /dev/null
+++ b/tools/sk_app/mac/WindowContextFactory_mac.h
@@ -0,0 +1,38 @@
+
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef WindowContextFactory_mac_DEFINED
+#define WindowContextFactory_mac_DEFINED
+
+#include "SDL.h"
+
+namespace sk_app {
+
+class WindowContext;
+struct DisplayParams;
+
+namespace window_context_factory {
+
+struct MacWindowInfo {
+    SDL_Window*  fWindow;
+};
+
+inline WindowContext* NewVulkanForMac(const MacWindowInfo&, const DisplayParams&) {
+    // No Vulkan support on Mac.
+    return nullptr;
+}
+
+WindowContext* NewGLForMac(const MacWindowInfo&, const DisplayParams&);
+
+WindowContext* NewRasterForMac(const MacWindowInfo&, const DisplayParams&);
+
+}  // namespace window_context_factory
+
+}  // namespace sk_app
+
+#endif
diff --git a/tools/sk_app/mac/Window_mac.cpp b/tools/sk_app/mac/Window_mac.cpp
new file mode 100644
index 0000000000..8de5b10450
--- /dev/null
+++ b/tools/sk_app/mac/Window_mac.cpp
@@ -0,0 +1,277 @@
+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#include "SkUtils.h"
+#include "Timer.h"
+#include "WindowContextFactory_mac.h"
+#include "Window_mac.h"
+
+namespace sk_app {
+
+SkTDynamicHash<Window_mac, Uint32> Window_mac::gWindowMap;
+
+Window* Window::CreateNativeWindow(void*) {
+    Window_mac* window = new Window_mac();
+    if (!window->initWindow()) {
+        delete window;
+        return nullptr;
+    }
+
+    return window;
+}
+
+bool Window_mac::initWindow() {
+    if (fRequestedDisplayParams.fMSAASampleCount != fMSAASampleCount) {
+        this->closeWindow();
+    }
+    // we already have a window
+    if (fWindow) {
+        return true;
+    }
+
+    constexpr int initialWidth = 1280;
+    constexpr int initialHeight = 960;
+
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+
+    SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
+    SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
+    SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
+    SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
+
+    SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1);
+
+    if (fRequestedDisplayParams.fMSAASampleCount > 0) {
+        SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
+        SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, fRequestedDisplayParams.fMSAASampleCount);
+    } else {
+        SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 0);
+    }
+    // TODO: handle other display params
+
+    uint32_t windowFlags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE;
+    fWindow = SDL_CreateWindow("SDL Window", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
+                               initialWidth, initialHeight, windowFlags);
+
+    if (!fWindow) {
+        return false;
+    }
+
+    fMSAASampleCount = fRequestedDisplayParams.fMSAASampleCount;
+
+    // add to hashtable of windows
+    fWindowID = SDL_GetWindowID(fWindow);
+    gWindowMap.add(this);
+
+    return true;
+}
+
+void Window_mac::closeWindow() {
+    if (fWindow) {
+        gWindowMap.remove(fWindowID);
+        SDL_DestroyWindow(fWindow);
+        fWindowID = 0;
+        fWindow = nullptr;
+    }
+}
+
+static Window::Key get_key(const SDL_Keysym& keysym) {
+    static const struct {
+        SDL_Keycode fSDLK;
+        Window::Key fKey;
+    } gPair[] = {
+        { SDLK_BACKSPACE, Window::Key::kBack },
+        { SDLK_CLEAR, Window::Key::kBack },
+        { SDLK_RETURN, Window::Key::kOK },
+        { SDLK_UP, Window::Key::kUp },
+        { SDLK_DOWN, Window::Key::kDown },
+        { SDLK_LEFT, Window::Key::kLeft },
+        { SDLK_RIGHT, Window::Key::kRight },
+        { SDLK_TAB, Window::Key::kTab },
+        { SDLK_PAGEUP, Window::Key::kPageUp },
+        { SDLK_PAGEDOWN, Window::Key::kPageDown },
+        { SDLK_HOME, Window::Key::kHome },
+        { SDLK_END, Window::Key::kEnd },
+        { SDLK_DELETE, Window::Key::kDelete },
+        { SDLK_ESCAPE, Window::Key::kEscape },
+        { SDLK_LSHIFT, Window::Key::kShift },
+        { SDLK_RSHIFT, Window::Key::kShift },
+        { SDLK_LCTRL, Window::Key::kCtrl },
+        { SDLK_RCTRL, Window::Key::kCtrl },
+        { SDLK_LALT, Window::Key::kOption },
+        { SDLK_LALT, Window::Key::kOption },
+        { 'A', Window::Key::kA },
+        { 'C', Window::Key::kC },
+        { 'V', Window::Key::kV },
+        { 'X', Window::Key::kX },
+        { 'Y', Window::Key::kY },
+        { 'Z', Window::Key::kZ },
+    };
+    for (size_t i = 0; i < SK_ARRAY_COUNT(gPair); i++) {
+        if (gPair[i].fSDLK == keysym.sym) {
+            return gPair[i].fKey;
+        }
+    }
+    return Window::Key::kNONE;
+}
+
+static uint32_t get_modifiers(const SDL_Event& event) {
+    static const struct {
+        unsigned    fSDLMask;
+        unsigned    fSkMask;
+    } gModifiers[] = {
+        { KMOD_SHIFT, Window::kShift_ModifierKey },
+        { KMOD_CTRL,  Window::kControl_ModifierKey },
+        { KMOD_ALT,   Window::kOption_ModifierKey },
+    };
+
+    auto modifiers = 0;
+
+    switch (event.type) {
+        case SDL_KEYDOWN:
+            // fall through
+        case SDL_KEYUP: {
+            for (size_t i = 0; i < SK_ARRAY_COUNT(gModifiers); ++i) {
+                if (event.key.keysym.mod & gModifiers[i].fSDLMask) {
+                    modifiers |= gModifiers[i].fSkMask;
+                }
+            }
+            if (0 == event.key.repeat) {
+                modifiers |= Window::kFirstPress_ModifierKey;
+            }
+            break;
+        }
+
+        default: {
+            SDL_Keymod mod = SDL_GetModState();
+            for (size_t i = 0; i < SK_ARRAY_COUNT(gModifiers); ++i) {
+                if (mod & gModifiers[i].fSDLMask) {
+                    modifiers |= gModifiers[i].fSkMask;
+                }
+            }
+            break;
+        }
+    }
+    return modifiers;
+}
+
+bool Window_mac::HandleWindowEvent(const SDL_Event& event) {
+    Window_mac* win = gWindowMap.find(event.window.windowID);
+    if (win && win->handleEvent(event)) {
+        return true;
+    }
+
+    return false;
+}
+
+bool Window_mac::handleEvent(const SDL_Event& event) {
+    switch (event.type) {
+        case SDL_WINDOWEVENT:
+            if (SDL_WINDOWEVENT_EXPOSED == event.window.event) {
+                this->onPaint();
+            } else if (SDL_WINDOWEVENT_RESIZED == event.window.event) {
+                this->onResize(event.window.data1, event.window.data2);
+            }
+            break;
+
+        case SDL_MOUSEBUTTONDOWN:
+            if (event.button.button == SDL_BUTTON_LEFT) {
+                this->onMouse(event.button.x, event.button.y,
+                              Window::kDown_InputState, get_modifiers(event));
+            }
+            break;
+
+        case SDL_MOUSEBUTTONUP:
+            if (event.button.button == SDL_BUTTON_LEFT) {
+                this->onMouse(event.button.x, event.button.y,
+                              Window::kUp_InputState, get_modifiers(event));
+            }
+            break;
+
+        case SDL_MOUSEMOTION:
+            this->onMouse(event.motion.x, event.motion.y,
+                          Window::kMove_InputState, get_modifiers(event));
+            break;
+
+        case SDL_MOUSEWHEEL:
+            this->onMouseWheel(event.wheel.y, get_modifiers(event));
+            break;
+
+        case SDL_KEYDOWN: {
+            Window::Key key = get_key(event.key.keysym);
+            if (key != Window::Key::kNONE) {
+                if (!this->onKey(key, Window::kDown_InputState, get_modifiers(event))) {
+                    if (event.key.keysym.sym == SDLK_ESCAPE) {
+                        return true;
+                    }
+                }
+            }
+        } break;
+
+        case SDL_KEYUP: {
+            Window::Key key = get_key(event.key.keysym);
+            if (key != Window::Key::kNONE) {
+                (void) this->onKey(key, Window::kUp_InputState,
+                                   get_modifiers(event));
+            }
+        } break;
+
+        case SDL_TEXTINPUT: {
+            const char* textIter = &event.text.text[0];
+            while (SkUnichar c = SkUTF8_NextUnichar(&textIter)) {
+                (void) this->onChar(c, get_modifiers(event));
+            }
+        } break;
+
+        default:
+            break;
+    }
+
+    return false;
+}
+
+void Window_mac::setTitle(const char* title) {
+    SDL_SetWindowTitle(fWindow, title);
+}
+
+void Window_mac::show() {
+    SDL_ShowWindow(fWindow);
+}
+
+bool Window_mac::attach(BackendType attachType) {
+    this->initWindow();
+
+    window_context_factory::MacWindowInfo info;
+    info.fWindow = fWindow;
+    switch (attachType) {
+        case kRaster_BackendType:
+            fWindowContext = NewRasterForMac(info, fRequestedDisplayParams);
+            break;
+
+        case kNativeGL_BackendType:
+        default:
+            fWindowContext = NewGLForMac(info, fRequestedDisplayParams);
+            break;
+    }
+    this->onBackendCreated();
+
+    return (SkToBool(fWindowContext));
+}
+
+void Window_mac::onInval() {
+    SDL_Event sdlevent;
+    sdlevent.type = SDL_WINDOWEVENT;
+    sdlevent.window.windowID = fWindowID;
+    sdlevent.window.event = SDL_WINDOWEVENT_EXPOSED;
+    SDL_PushEvent(&sdlevent);
+}
+
+}   // namespace sk_app
diff --git a/tools/sk_app/mac/Window_mac.h b/tools/sk_app/mac/Window_mac.h
new file mode 100644
index 0000000000..aa5c8df696
--- /dev/null
+++ b/tools/sk_app/mac/Window_mac.h
@@ -0,0 +1,64 @@
+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#ifndef Window_mac_DEFINED
+#define Window_mac_DEFINED
+
+#include "../Window.h"
+#include "SkChecksum.h"
+#include "SkTDynamicHash.h"
+
+#include "SDL.h"
+
+namespace sk_app {
+
+class Window_mac : public Window {
+public:
+    Window_mac()
+        : INHERITED()
+        , fWindow(nullptr)
+        , fWindowID(0)
+        , fMSAASampleCount(0) {}
+    ~Window_mac() override { this->closeWindow(); }
+
+    bool initWindow();
+
+    void setTitle(const char*) override;
+    void show() override;
+
+    bool attach(BackendType) override;
+
+    void onInval() override;
+
+    static bool HandleWindowEvent(const SDL_Event& event);
+
+    static const Uint32& GetKey(const Window_mac& w) {
+        return w.fWindowID;
+    }
+
+    static uint32_t Hash(const Uint32& winID) {
+        return winID;
+    }
+
+private:
+    bool handleEvent(const SDL_Event& event);
+
+    void closeWindow();
+
+    static SkTDynamicHash<Window_mac, Uint32> gWindowMap;
+
+    SDL_Window*  fWindow;
+    Uint32       fWindowID;
+
+    int          fMSAASampleCount;
+
+    typedef Window INHERITED;
+};
+
+}   // namespace sk_app
+
+#endif
diff --git a/tools/sk_app/mac/main_mac.cpp b/tools/sk_app/mac/main_mac.cpp
new file mode 100644
index 0000000000..6dcf5b93f7
--- /dev/null
+++ b/tools/sk_app/mac/main_mac.cpp
@@ -0,0 +1,58 @@
+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#include "SkTypes.h"
+#include "SkTHash.h"
+#include "SDL.h"
+#include "Timer.h"
+#include "Window_mac.h"
+#include "../Application.h"
+
+using sk_app::Application;
+
+int main(int argc, char* argv[]) {
+    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS) != 0) {
+        SkDebugf("Could not initialize SDL!\n");
+        return 1;
+    }
+
+    Application* app = Application::Create(argc, argv, nullptr);
+
+    SDL_Event event;
+    bool done = false;
+    while (!done) {
+        while (SDL_PollEvent(&event)) {
+            switch (event.type) {
+                // events handled by the windows
+                case SDL_WINDOWEVENT:
+                case SDL_MOUSEMOTION:
+                case SDL_MOUSEBUTTONDOWN:
+                case SDL_MOUSEBUTTONUP:
+                case SDL_MOUSEWHEEL:
+                case SDL_KEYDOWN:
+                case SDL_KEYUP:
+                case SDL_TEXTINPUT:
+                    done = sk_app::Window_mac::HandleWindowEvent(event);
+                    break;
+
+                case SDL_QUIT:
+                    done = true;
+                    break;
+
+                default:
+                    break;
+            }
+        }
+
+        app->onIdle();
+    }
+    delete app;
+
+    SDL_Quit();
+
+    return 0;
+}