步骤1:
Image* image = NULL;
image = Bitmap::FromFile(m_lpwFPSImagePath[i], TRUE);
DDSURFACEDESC2 ddsd;
DDCOLORKEY ddck;
ZeroMemory( &ddsd, sizeof( ddsd ) );
ddsd.dwSize = sizeof( ddsd );
ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_VIDEOMEMORY;
ddsd.dwWidth = image->GetWidth();;
ddsd.dwHeight = image->GetHeight();
hr = m_pDevice->CreateSurface(&ddsd, &m_pFPSTexture, NULL );
if( hr != DD_OK )
{
if(hr == DDERR_OUTOFVIDEOMEMORY)
{
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN |
DDSCAPS_SYSTEMMEMORY;
hr = m_pDevice->CreateSurface(&ddsd, &m_pFPSTexture, NULL );
}
}
第2步:
矩形 SrcRect={0,0,fTexWidth,fTexHeight}; 矩形 DstRect = {0,0,60,20};
hr = m_pPrimarySurf->Blt(&DstRect,
m_pFPSTexture,&SrcRect,DDBLT_WAIT,NULL);
注意:图像尺寸为:3170 x 64
m_pPrimarySurf->Blt(...) 返回 E_INVALIDARG 。所以为什么 ?谢谢 !