win32HBITMAP绘制位图为什么没法显示

Question

void GameScene::ResetPlayer()
{
if (pPlayer == NULL)
pPlayer = new Tank(GameManage::wndWidth/2, GameManage::wndHeight-GetPrivateProfileInt(L"Player", L"size",50, fileIni), UP, GetPrivateProfileInt(L"Player", L"vel",2, fileIni), GetPrivateProfileInt(L"Player", L"size",50, fileIni)
,1, true, Ball);

pPlayer->SetPos(GameManage::wndWidth/2, GameManage::wndHeight-GetPrivateProfileInt(L"Player", L"size",50, fileIni));

}

void Entity::DrawEntity(HDC hdc)
{
HDC hdcMem = CreateCompatibleDC(hdc);
HBITMAP bmp = a;
HBITMAP hbmOld = (HBITMAP)SelectObject(hdcMem, bmp);
BITMAP bm;
GetObject(bmp, sizeof(bm), &bm);
SetStretchBltMode(hdc,STRETCH_HALFTONE);
SelectObject(hdcMem, hbmOld);
DeleteDC(hdcMem);
}

Answer 1

首先你先保存到文件里，看看能不能打开，如果不能你的 bmp 格式有问题。如果能 格式没问题， 就看你mfc 哪里写的有问题， 刷新没刷新