issue #1515: Adding a zoom function for debugging large resolution (e.g.new ipad) app on desktop.

cocos2dx/platform/win32/CCEGLView.cpp

@@ -184,8 +184,6 @@ CCEGLView::CCEGLView()
 , m_lpfnAccelerometerKeyHook(NULL)
 , m_menu(NULL)
 , m_wndproc(NULL)
-, m_windowWidth(0)
-, m_windowHeight(0)
 , m_windowTouchScaleX(1.0f)
 , m_windowTouchScaleY(1.0f)
 , m_bSupportTouch(false)
@@ -347,14 +345,14 @@ LRESULT CCEGLView::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
         {
             POINT point = {(short)LOWORD(lParam), (short)HIWORD(lParam)};
             CCPoint pt(point.x, point.y);
+            pt.x *= m_windowTouchScaleX;
+            pt.y *= m_windowTouchScaleY;
             CCPoint tmp = ccp(pt.x, m_obScreenSize.height - pt.y);
             if (m_obViewPortRect.equals(CCRectZero) || m_obViewPortRect.containsPoint(tmp))
             {
                 m_bCaptured = true;
                 SetCapture(m_hWnd);
                 int id = 0;
-                pt.x *= m_windowTouchScaleX;
-                pt.y *= m_windowTouchScaleY;
                 handleTouchesBegin(1, &id, &pt.x, &pt.y);
             }
         }
@@ -620,8 +618,6 @@ void CCEGLView::resize(int width, int height)
     rcClient.right = rcClient.left + width;
     rcClient.bottom = rcClient.top + height;
 
-    m_windowWidth = width;
-    m_windowHeight = height;
     const CCSize& frameSize = getFrameSize();
     if (frameSize.width > 0)
     {
@@ -644,6 +640,13 @@ void CCEGLView::resize(int width, int height)
                  SWP_NOCOPYBITS | SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOZORDER);
 }
 
+void CCEGLView::setFrameZoom(float fZoomFactor)
+{
+    resize(m_obScreenSize.width * fZoomFactor, m_obScreenSize.height * fZoomFactor);
+    centerWindow();
+    CCDirector::sharedDirector()->setProjection(CCDirector::sharedDirector()->getProjection());
+}
+
 void CCEGLView::setFrameSize(float width, float height)
 {
     CCEGLViewProtocol::setFrameSize(width, height);
@@ -684,6 +687,14 @@ void CCEGLView::centerWindow()
     SetWindowPos(m_hWnd, 0, offsetX, offsetY, 0, 0, SWP_NOCOPYBITS | SWP_NOSIZE | SWP_NOOWNERZORDER | SWP_NOZORDER);
 }
 
+void CCEGLView::setViewPortInPoints(float x , float y , float w , float h)
+{
+    glViewport((GLint)(x * m_fScaleX / m_windowTouchScaleX + m_obViewPortRect.origin.x / m_windowTouchScaleX),
+        (GLint)(y * m_fScaleY  / m_windowTouchScaleY + m_obViewPortRect.origin.y / m_windowTouchScaleY),
+        (GLsizei)(w * m_fScaleX / m_windowTouchScaleX),
+        (GLsizei)(h * m_fScaleY / m_windowTouchScaleY));
+}
+
 CCEGLView* CCEGLView::sharedOpenGLView()
 {
     static CCEGLView* s_pEglView = NULL;

cocos2dx/platform/win32/CCEGLView.h

@@ -62,11 +62,16 @@ public:
     // win32 platform function
     HWND getHWnd();
     void resize(int width, int height);
+    /* 
+     * Set zoom factor for frame. This method is for debugging big resolution (e.g.new ipad) app on desktop.
+     */
+    void setFrameZoom(float fZoomFactor);
     void centerWindow();
 
     typedef void (*LPFN_ACCELEROMETER_KEYHOOK)( UINT message,WPARAM wParam, LPARAM lParam );
     void setAccelerometerKeyHook( LPFN_ACCELEROMETER_KEYHOOK lpfnAccelerometerKeyHook );
 
+    virtual void setViewPortInPoints(float x , float y , float w , float h);
     // static function
     /**
     @brief    get the shared main open gl window
@@ -86,8 +91,6 @@ private:
     LPCWSTR m_menu;
     CUSTOM_WND_PROC m_wndproc;
 
-    int m_windowWidth;
-    int m_windowHeight;
     float m_windowTouchScaleX;
     float m_windowTouchScaleY;
 };

samples/HelloCpp/proj.win32/main.cpp

@@ -15,6 +15,9 @@ int APIENTRY _tWinMain(HINSTANCE hInstance,
     // create the application instance
     AppDelegate app;
     CCEGLView* eglView = CCEGLView::sharedOpenGLView();
-    eglView->setFrameSize(1136, 640 );
+    eglView->setFrameSize(2048, 1536);
+    // The resolution of ipad3 is very large. In general, PC's resolution is smaller than it.
+    // So we need to invoke 'setFrameZoom'(only valid on desktop(win32, mac, linux)) to make the window smaller.
+    eglView->setFrameZoom(0.4f);
     return CCApplication::sharedApplication()->run();
 }