[uphone] use a shared TWindow to draw bitmaps and texts, this optimization promotes the performance on uphone about 5%~6%

cocos2dx/platform/uphone/CCXBitmapDC.cpp

@@ -29,20 +29,27 @@ THE SOFTWARE.
 
 namespace cocos2d {
 
+    static TWindow * s_pMemWnd = NULL;
+
 	CCXBitmapDC::CCXBitmapDC(int width, int height)
+        : m_pBitmap(NULL)
 	{
-		m_pBitmap->Create(width, height, 32);
+        m_pBitmap = TBitmap::Create(width, height, 32);
-		m_pWindow = NULL;
 	}
+
 	CCXBitmapDC::CCXBitmapDC(const char *text, CGSize dimensions, UITextAlignment alignment, const char *fontName, float fontSize)
+        : m_pBitmap(NULL)
+	{
+        TUChar *pText = NULL; 
+        do 
         {
             // create font
             TFont font;
-		font.Create(0, (Int32)fontSize);
+            CCX_BREAK_IF(! font.Create(0, (Int32)fontSize));
 
             // text
             Int32 len = strlen(text) + 1;
-		TUChar *pText = new TUChar[len];
+            CCX_BREAK_IF(! (pText = new TUChar[len]));
             TUString::StrGBToUnicode(pText, (Char*)text);
 
             // calculate text size
@@ -58,12 +65,42 @@ namespace cocos2d {
             Int16 width = (Int16)m_tSize.width;
             Int16 height = (Int16)m_tSize.height;
 
+            // create bitmap
+            CCX_BREAK_IF(! (m_pBitmap = TBitmap::Create(width, height, 32)));
+
             // create memory window
-		m_pWindow = new TWindow(CCXApplication::sharedApplication());
+            if (s_pMemWnd)
-		m_pWindow->CreateMemWindow(width, height,screenTransparentFormat);
+            {
+                TRectangle rcMemWnd(0, 0, 0, 0);
+                s_pMemWnd->GetClientBounds(&rcMemWnd);
+                if (rcMemWnd.Width() < width || rcMemWnd.Height() < height)
+                {
+                    s_pMemWnd->CloseWindow();
+                    s_pMemWnd = NULL;
+                }
+            }
+
+            do 
+            {
+                // if memery window is already break
+                CCX_BREAK_IF(s_pMemWnd);
+
+                CCX_BREAK_IF(! (s_pMemWnd = new TWindow(CCXApplication::sharedApplication())));
+
+                Coord nCurrentWidth = CCXApplication::GetCurrentApplication()->GetScreenWidth();
+                Coord nCurrentHeight = CCXApplication::GetCurrentApplication()->GetScreenHeight();
+                
+                Coord nMemWndW = (width >= nCurrentWidth) ? width : nCurrentWidth;
+                Coord nMemWndH = (height >= nCurrentHeight) ? height : nCurrentHeight;
+                CCX_BREAK_IF(s_pMemWnd->CreateMemWindow(nMemWndW, nMemWndH,screenTransparentFormat));
+                delete s_pMemWnd;
+                s_pMemWnd = NULL;
+            } while (0);
+
+            CCX_BREAK_IF(! s_pMemWnd);
             
             // create DC
-		TDC dc(m_pWindow);
+            TDC dc(s_pMemWnd);
             // set DC styles
             UInt32 styles = GUI_API_STYLE_SPECIFY_FORE_COLOR |  GUI_API_STYLE_ROP_MODE_TRANSPARENT |
                 GUI_API_STYLE_SPECIFY_BACK_COLOR | GUI_API_STYLE_ALIGNMENT_MIDDLE | GUI_API_STYLE_SPECIFY_FONT;
@@ -83,23 +120,28 @@ namespace cocos2d {
                 styles |= GUI_API_STYLE_ALIGNMENT_CENTER;
                 break;
             }
-		TRectangle rect;
-		m_pWindow->GetWindowFrameRect(&rect);
 
-		m_pBitmap = m_pWindow->GetMemWindowTBitmapPtr();
+            s_pMemWnd->GetMemWindowTBitmapPtr()->Fill32(RGBA(0, 0, 0, 0), 0, 0, width, height);
- 		m_pBitmap->Fill32(RGBA(0, 0, 0, 0));
 
+            TRectangle rect(0, 0, width, height);
             dc.DrawTextInRectangleEx(pText, 0, RGBA(255,255,255,255), RGBA(0,0,0,255), font, &rect, styles);
 
+            dc.ReadBitmap(m_pBitmap, 0, 0);
+
+        } while (0);
+        if (pText)
+        {
             delete[] pText;
+            pText = NULL;
+        }
 	}
 
 	CCXBitmapDC::~CCXBitmapDC(void)
 	{
-		if (m_pWindow)
+        if (m_pBitmap)
         {
-			m_pWindow->CloseWindowNow();
+            m_pBitmap->Destroy();
-			m_pWindow = NULL;
+            m_pBitmap = NULL;
         }
 	}
 

cocos2dx/platform/uphone/CCXBitmapDC.h

@@ -47,7 +47,6 @@ namespace cocos2d{
 	protected:
 		TBitmap *m_pBitmap;
 		CGSize m_tSize;
-		TWindow *m_pWindow;
 	};
 }
 

cocos2dx/platform/uphone/CCXUIImage_uphone.cpp

@@ -83,6 +83,12 @@ UIImage::UIImage(void)
 
 UIImage::UIImage(CCXBitmapDC * pBmpDC)
 {
+    m_imageInfo.hasAlpha = false;
+    m_imageInfo.isPremultipliedAlpha = false;
+    m_imageInfo.height = 0;
+    m_imageInfo.width = 0;
+    m_imageInfo.data = NULL;
+    m_imageInfo.bitsPerComponent = 0;
 	do 
 	{
 		CCX_BREAK_IF(! pBmpDC);