C++新人求助
求助
把PNG图片读入到BYTE*
然后根据BYTE* 利用GDIPlus把图片画出来
最好有例子..
谢谢
[解决办法]
BOOL CGDIPClockDlg::ImageFromIDResource(UINT nID, LPCTSTR sTR,Image * &pImg){ HINSTANCE hInst = AfxGetResourceHandle(); HRSRC hRsrc = ::FindResource (hInst,MAKEINTRESOURCE(nID),sTR); // type if (!hRsrc) return FALSE; // load resource into memory DWORD len = SizeofResource(hInst, hRsrc); BYTE* lpRsrc = (BYTE*)LoadResource(hInst, hRsrc); if (!lpRsrc) return FALSE; // Allocate global memory on which to create HGLOBAL m_hMem = GlobalAlloc(GMEM_FIXED, len); BYTE* pmem = (BYTE*)GlobalLock(m_hMem); memcpy(pmem,lpRsrc,len); IStream* pstm; CreateStreamOnHGlobal(m_hMem,FALSE,&pstm); // load from stream pImg=Gdiplus::Image::FromStream(pstm); // free/release stuff GlobalUnlock(m_hMem); pstm->Release(); FreeResource(lpRsrc);}
[解决办法]
BOOL CGDIPClockDlg::UpdateClockDisplay(int Transparent){ HDC hdcTemp=GetDC()->m_hDC; m_hdcMemory=CreateCompatibleDC(hdcTemp); HBITMAP hBitMap=CreateCompatibleBitmap(hdcTemp,m_BakWidth,m_BakHeight); SelectObject(m_hdcMemory,hBitMap); if(Transparent<0||Transparent>100) Transparent=100; m_Blend.SourceConstantAlpha=int(Transparent*2.55);//1~255 HDC hdcScreen=::GetDC (m_hWnd); RECT rct; GetWindowRect(&rct); POINT ptWinPos={rct.left,rct.top}; Graphics graph(m_hdcMemory); Point points[] = { Point(0, 0), Point(m_BakWidth, 0), Point(0, m_BakHeight) }; static bool bFly=false; bFly?graph.DrawImage(m_pImageClock, points, 3): graph.DrawImage(m_pImageClock1, points, 3); bFly=!bFly; int OxyX=140;//m_BakWidth/2+8; int OxyY=90;//m_BakHeight/2+10; SYSTEMTIME SystemTime; // address of system time structure GetLocalTime(&SystemTime); Matrix matrixH(1,0,0,1,OxyX,OxyY); // 定义一个单位矩阵，坐标原点在表盘中央 matrixH.Rotate(SystemTime.wHour*30+SystemTime.wMinute/2.0-180); // 时针旋转的角度度 Point pointsH[] = { Point(0, 0),Point(m_HourWidth, 0),Point(0, m_HourHeight)}; matrixH.Translate(-m_HourWidth/2,-m_HourHeight/6); matrixH.TransformPoints( pointsH, 3); // 用该矩阵转换points graph.DrawImage (m_pImageHHour,pointsH, 3); Matrix matrixM(1,0,0,1,OxyX,OxyY); // 定义一个单位矩阵，坐标原点在表盘中央 matrixM.Rotate(SystemTime.wMinute*6-180); // 分针旋转的角度度 Point pointsM[] = { Point(0, 0),Point(m_MinuWidth, 0),Point(0, m_MinuHeight)}; matrixM.Translate(-m_MinuWidth/2,-m_MinuHeight/6); matrixM.TransformPoints( pointsM, 3); // 用该矩阵转换pointsM graph.DrawImage (m_pImageHMinu,pointsM, 3); Matrix matrix(1,0,0,1,OxyX,OxyY); // 定义一个单位矩阵，坐标原点在表盘中央 matrix.Rotate(SystemTime.wSecond*6-180); // 秒针旋转的角度度 Point pointsS[] = { Point(0, 0),Point( m_SecWidth,0),Point(0,m_SecHeight )}; matrix.Translate(-m_SecWidth/2,-m_SecHeight/7); matrix.TransformPoints( pointsS, 3); // 用该矩阵转换pointsS graph.DrawImage (m_pImageHSec,pointsS, 3);//H graph.DrawImage(m_pImageNum,0, 0, 14*(SystemTime.wHour/10), 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置 graph.DrawImage(m_pImageNum,20,0, 14*(SystemTime.wHour%10), 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置//: graph.DrawImage(m_pImageNum,20*2,0, 140, 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置//M graph.DrawImage(m_pImageNum,20*3, 0, 14*(SystemTime.wMinute/10), 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置 graph.DrawImage(m_pImageNum,20*4,0, 14*(SystemTime.wMinute%10), 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置//: graph.DrawImage(m_pImageNum,20*5,0, 140, 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置//S graph.DrawImage(m_pImageNum,20*6, 0, 14*(SystemTime.wSecond/10), 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置 graph.DrawImage(m_pImageNum,20*7,0, 14*(SystemTime.wSecond%10), 0,14,23,UnitPixel); //该函数从m_pImageClock中剪切指定rect中的像素draw到指定位置 SIZE sizeWindow={m_BakWidth,m_BakHeight}; POINT ptSrc={0,0}; DWORD dwExStyle=GetWindowLong(m_hWnd,GWL_EXSTYLE); if((dwExStyle&0x80000)!=0x80000) SetWindowLong(m_hWnd,GWL_EXSTYLE,dwExStyle^0x80000); BOOL bRet=FALSE; bRet= UpdateLayeredWindow( m_hWnd,hdcScreen,&ptWinPos, &sizeWindow,m_hdcMemory,&ptSrc,0,&m_Blend,2); graph.ReleaseHDC(m_hdcMemory); ::ReleaseDC(m_hWnd,hdcScreen); hdcScreen=NULL; ::ReleaseDC(m_hWnd,hdcTemp); hdcTemp=NULL; DeleteObject(hBitMap); DeleteDC(m_hdcMemory); m_hdcMemory=NULL; return bRet;}
[解决办法]
要整个项目的文件，发邮件到winshing@qq.com
[解决办法]