bitmapmethods.cpp

symbian os c++ 碰撞小球 代码

/*
 * NBitMapMethod.cpp
 *
 *  Created on: 2009-3-3
 *      Author: pengxingfu
 */

#include "BitmapMethods.h"  
#include <eikenv.h>    
#include <fbs.h> 


 CFbsBitGc* NBitmapMethods::CreateGraphicsContextLC(CFbsBitmapDevice& aBitmapDevice)   
    {   
    CFbsBitGc* graphicsContext = NULL;   
    User::LeaveIfError(aBitmapDevice.CreateContext(graphicsContext));   
    CleanupStack::PushL(graphicsContext);   
    return graphicsContext;   
    }   
   
   
CFbsBitGc* NBitmapMethods::CreateGraphicsContextL(CFbsBitmapDevice& aBitmapDevice)   
    {   
    CFbsBitGc* gc = CreateGraphicsContextLC(aBitmapDevice);   
    CleanupStack::Pop(gc);   
    return gc;   
    }   
   
   
CFbsBitmapDevice* NBitmapMethods::CreateBitmapDeviceLC(CFbsBitmap& aBitmap)   
    {   
    CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(&aBitmap);   
    CleanupStack::PushL(bitmapDevice);   
    return bitmapDevice;   
    }   
   
   
CFbsBitmapDevice* NBitmapMethods::CreateBitmapDeviceL(CFbsBitmap& aBitmap)   
    {   
    CFbsBitmapDevice* device = CreateBitmapDeviceLC(aBitmap);   
    CleanupStack::Pop(device);   
    return device;   
    }   
   
   
CFbsBitmap* NBitmapMethods::CreateBitmapLC(TSize aSizeInPixels,TDisplayMode aDispMode)   
    {   
    CFbsBitmap* bitmap = new(ELeave) CFbsBitmap();   
    CleanupStack::PushL(bitmap);   
    User::LeaveIfError(bitmap->Create(aSizeInPixels,aDispMode));   
    ASSERT((bitmap->DisplayMode() == KColourDepth) || (bitmap->DisplayMode()  == EGray2));   
    return bitmap;   
    }   
   
   
CFbsBitmap* NBitmapMethods::CreateBitmapL(TSize aSizeInPixels,TDisplayMode aDispMode)   
    {   
    CFbsBitmap* bitmap = CreateBitmapLC(aSizeInPixels,aDispMode);   
    CleanupStack::Pop(bitmap);   
    return bitmap;   
    }   
   
   
CFbsBitmap* NBitmapMethods::CreateBitmapLC(const TDesC& aFileName,TInt aId)   
    {   
    CFbsBitmap* bitmap = new(ELeave) CFbsBitmap();   
   
    CleanupStack::PushL(bitmap);   
    TInt loadException = bitmap->Load(aFileName,aId);   
    User::LeaveIfError(loadException);   
   
    if ((bitmap->DisplayMode() == KColourDepth) || (bitmap->DisplayMode()  == EGray2))   
        {   
        return bitmap;   
        }   
    else   
        {   
        CFbsBitmap* newBitmap = CreateBitmapLC( bitmap->SizeInPixels(),KColourDepth);                                                              
   
        CFbsBitmapDevice*       bitmapDevice    = CreateBitmapDeviceLC(*newBitmap);   
        CFbsBitGc*              bitmapGc        = CreateGraphicsContextLC(*bitmapDevice);   
        bitmapGc->BitBlt(TPoint(0,0),bitmap,TRect(bitmap->SizeInPixels()));   
        CleanupStack::PopAndDestroy(2); // gc and device    
        // The next three lines are here to get rid of the old bitmap but keep the new one     
        CleanupStack::Pop(newBitmap);   
        CleanupStack::PopAndDestroy(bitmap);   
        CleanupStack::PushL(newBitmap);   
   
        return newBitmap;   
        }   
    }   
   
   
CFbsBitmap* NBitmapMethods::CreateBitmapL(const TDesC& aFileName,TInt aId)
    {   
    CFbsBitmap* bitmap = CreateBitmapLC(aFileName, aId);   
    CleanupStack::Pop(bitmap);   
    return bitmap;   
    }   
   
void NBitmapMethods::BitBltMaskedEntireBitmap(CFbsBitGc& aTargetGc,TPoint aTopLeft,   
                                              const CFbsBitmap& aBitmap,const CFbsBitmap& aBitMask)   
    {   
    PartialReset(aTargetGc);   
    aTargetGc.BitBltMasked(aTopLeft,&aBitmap,aBitmap.SizeInPixels(),&aBitMask,ETrue);   
    PartialReset(aTargetGc);   
    }   
   
   
void NBitmapMethods::PartialReset(CFbsBitGc& aGc)   
    {   
    aGc.SetPenSize(TSize(1,1));   
    aGc.SetPenColor(KRgbBlack);   
    aGc.SetPenStyle(CFbsBitGc::ESolidPen);   
    aGc.SetDrawMode(CFbsBitGc::EDrawModePEN);   
    aGc.DiscardFont();   
    aGc.DiscardBrushPattern();   
    aGc.SetBrushColor(KRgbWhite);   
    aGc.SetBrushStyle(CFbsBitGc::ENullBrush);   
    aGc.SetCharJustification(0,0);   
    aGc.SetWordJustification(0,0);   
    aGc.SetDitherOrigin(TPoint(0,0));   
    aGc.SetPenStyle(CFbsBitGc::ENullPen);   
    aGc.SetShadowMode(EFalse);   
    aGc.SetStrikethroughStyle(EStrikethroughOff);   
    aGc.SetUnderlineStyle(EUnderlineOff);   
    aGc.SetUserDisplayMode(ENone);   
    }