绘制图形和显示图片.ppt

绘制图形和显示图片 主要内容 屏幕绘图函数介绍 直接在屏幕上绘图 显示位图或SVG图 特殊效果绘图 屏幕绘图函数 绘制基本形状API 设备绘图上下文类CWindowGc 提供绘图API void DrawArc(const TRect aRect,const TPoint aStart,const TPoint aEnd); void DrawLine(const TPoint aPoint1,const TPoint aPoint2); void DrawLineTo(const TPoint aPoint); void DrawLineBy(const TPoint aPoint); void DrawPolyLine(const CArrayFixTPoint *aPointList); void DrawPolyLine(const TPoint* aPointList,TInt aNumPoints); void DrawPie(const TRect aRect,const TPoint aStart,const TPoint aEnd); void DrawEllipse(const TRect aRect); void DrawRect(const TRect aRect); void DrawRoundRect(const TRect aRect,const TSize aEllipse); ... ... 屏幕绘图函数 绘制图片API 设备绘图上下文类CWindowGc 提供绘图API void BitBlt(const TPoint aPos, const CFbsBitmap *aBitmap); void BitBlt(const TPoint aDestination, const CFbsBitmap *aBitmap, const TRect aSource); void BitBltMasked(const TPoint aPoint,const CFbsBitmap* aBitmap, const TRect aSourceRect,const CFbsBitmap* aMaskBitmap, TBool aInvertMask); void BitBlt(const TPoint aPoint, const CWsBitmap *aBitmap); void BitBlt(const TPoint aDestination, const CWsBitmap *aBitmap, const TRect aSource); void BitBltMasked(const TPoint aPoint,const CWsBitmap *aBitmap, const TRect aSourceRect,const CWsBitmap *aMaskBitmap, TBool aInvertMask); 屏幕绘图函数 绘制图片API 设备绘图上下文类CWindowGc 提供绘图API void DrawBitmap(const TPoint aTopLeft, const CFbsBitmap *aDevice); void DrawBitmap(const TRect aDestRect, const CFbsBitmap *aDevice); void DrawBitmap(const TRect aDestRect, const CFbsBitmap *aDevice, const TRect aSourceRect); void DrawBitmapMasked(const TRect aDestRect, const CFbsBitmap* aBitmap, const TRect aSourceRect, const CFbsBitmap* aMaskBitmap, TBool aInvertMask); void DrawBitmapMasked(const TRect aDestRect, const CWsBitmap* aBitmap, const TRect aSourceRect, const CWsBitmap* aMaskBitmap, TBool aInvertMask); 屏幕绘图函数 图片格式 位图或SVG图 直接在屏幕上绘图 void CGraphicExamContainer::Draw(const TRect aRect) const { CWindowGc gc = SystemGc(); //清空窗口上的内容 gc.SetPenStyle( CGraphicsContext::ENullPen ); g