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qt之开发大恒usb3.0相机三

news 来源：原创 2025/5/31 20:35:52

上一篇大恒相机的开发是基于Qt Creator msvc工具链编译的，大恒相机msvc使用的的lib库是c++版的。如果想要使用mingw工具链开发大恒相机，那么找连接对相应的lib库。mingw对应的库是c的。

配置如下：

图像获取核心代码如下

void __stdcall Widget::OnFrameCallbackFun(GX_FRAME_CALLBACK_PARAM* pFrame)
{Widget *pDlg = (Widget*)(pFrame->pUserParam);int nImageHeight = pDlg->m_nImageHeight;int nImageWidth  = pDlg->m_nImageWidth;if (pFrame->status == 0){memcpy(pDlg->m_pBufferRaw,pFrame->pImgBuf,pFrame->nImgSize);// 黑白相机需要翻转数据后显示for(int i =0;i <nImageHeight;i++){memcpy(pDlg->m_pImageBuffer+i*nImageWidth, pDlg->m_pBufferRaw+(nImageHeight-i-1)*nImageWidth,(size_t)nImageWidth);}//pDlg->DrawImg();// 图像保存处理QImage img(pDlg->m_pImageBuffer,pDlg->m_nImageWidth,pDlg->m_nImageHeight,QImage::Format_Indexed8);emit pDlg->imageReady(img);}
}
bool  Widget::PrepareForShowImg()
{//---------------------------------------------------------------------//----------------------初始化bitmap头---------------------------------m_pBmpInfo								= (BITMAPINFO *)m_chBmpBuf;m_pBmpInfo->bmiHeader.biSize			= sizeof(BITMAPINFOHEADER);m_pBmpInfo->bmiHeader.biWidth			= (LONG)m_nImageWidth;m_pBmpInfo->bmiHeader.biHeight			= (LONG)m_nImageHeight;m_pBmpInfo->bmiHeader.biPlanes			= 1;m_pBmpInfo->bmiHeader.biBitCount		= 8; // 黑白图像为8m_pBmpInfo->bmiHeader.biCompression		= BI_RGB;m_pBmpInfo->bmiHeader.biSizeImage		= 0;m_pBmpInfo->bmiHeader.biXPelsPerMeter	= 0;m_pBmpInfo->bmiHeader.biYPelsPerMeter	= 0;m_pBmpInfo->bmiHeader.biClrUsed			= 0;m_pBmpInfo->bmiHeader.biClrImportant	= 0;// 黑白图像需要初始化调色板for(int i=0;i<256;i++){m_pBmpInfo->bmiColors[i].rgbBlue	=i;m_pBmpInfo->bmiColors[i].rgbGreen	=i;m_pBmpInfo->bmiColors[i].rgbRed		=i;m_pBmpInfo->bmiColors[i].rgbReserved=0;}//--------------------------------------------------------------------------//------------------------图像数据Buffer分配---------------------------------//为原始图像数据分配空间m_pBufferRaw = new BYTE[(size_t)m_nPayLoadSize];if (m_pBufferRaw == NULL){return false;}//为经过翻转后的图像数据分配空间m_pImageBuffer = new BYTE[(size_t)(m_nImageWidth * m_nImageHeight)];if (m_pImageBuffer == NULL){delete []m_pBufferRaw;m_pBufferRaw = NULL;return false;}return true;
}