用DirectX8.0的DirectX Graphics怎样显示24位真彩位图？
如果比较简单，能不能给些代码？ 问题点数：70、回复次数：2Top
1 楼DarthVader（mm咋就那么白呢 唉 还是当黑炭吧）回复于 2003-06-03 14:43:33 得分 70
DirectX8.0 SDK的Sample：
...
//-----------------------------------------------------------------------------
// Name: CSurface::ReDrawBitmapOnSurface()
// Desc: Load a bitmap from a file or resource into a DirectDraw surface.
// normaly used to re-load a surface after a restore.
//-----------------------------------------------------------------------------
HRESULT CSurface::DrawBitmap( TCHAR* strBMP,
DWORD dwDesiredWidth, DWORD dwDesiredHeight )
{
HBITMAP hBMP;
HRESULT hr;
if( m_pdds == NULL || strBMP == NULL )
return E_INVALIDARG;
// Try to load the bitmap as a resource, if that fails, try it as a file
hBMP = (HBITMAP) LoadImage( GetModuleHandle(NULL), strBMP,
IMAGE_BITMAP, dwDesiredWidth, dwDesiredHeight,
LR_CREATEDIBSECTION );
if( hBMP == NULL )
{
hBMP = (HBITMAP) LoadImage( NULL, strBMP, IMAGE_BITMAP,
dwDesiredWidth, dwDesiredHeight,
LR_LOADFROMFILE | LR_CREATEDIBSECTION );
if( hBMP == NULL )
return E_FAIL;
}
// Draw the bitmap on this surface
if( FAILED( hr = DrawBitmap( hBMP, 0, 0, 0, 0 ) ) )
{
DeleteObject( hBMP );
return hr;
}
DeleteObject( hBMP );
return S_OK;
}
//-----------------------------------------------------------------------------
// Name: CSurface::DrawBitmap()
// Desc: Draws a bitmap over an entire DirectDrawSurface, stretching the
// bitmap if nessasary
//-----------------------------------------------------------------------------
HRESULT CSurface::DrawBitmap( HBITMAP hBMP,
DWORD dwBMPOriginX, DWORD dwBMPOriginY,
DWORD dwBMPWidth, DWORD dwBMPHeight )
{
HDC hDCImage;
HDC hDC;
BITMAP bmp;
DDSURFACEDESC2 ddsd;
HRESULT hr;
if( hBMP == NULL || m_pdds == NULL )
return E_INVALIDARG;
// Make sure this surface is restored.
if( FAILED( hr = m_pdds->Restore() ) )
return hr;
// Get the surface.description
ddsd.dwSize = sizeof(ddsd);
m_pdds->GetSurfaceDesc( &ddsd );
if( ddsd.ddpfPixelFormat.dwFlags == DDPF_FOURCC )
return E_NOTIMPL;
// Select bitmap into a memoryDC so we can use it.
hDCImage = CreateCompatibleDC( NULL );
if( NULL == hDCImage )
return E_FAIL;
SelectObject( hDCImage, hBMP );
// Get size of the bitmap
GetObject( hBMP, sizeof(bmp), &bmp );
// Use the passed size, unless zero
dwBMPWidth = ( dwBMPWidth == 0 ) ? bmp.bmWidth : dwBMPWidth;
dwBMPHeight = ( dwBMPHeight == 0 ) ? bmp.bmHeight : dwBMPHeight;
// Stretch the bitmap to cover this surface
if( FAILED( hr = m_pdds->GetDC( &hDC ) ) )
return hr;
// This is the secret of scalability!!
StretchBlt( hDC, 0, 0,
ddsd.dwWidth, ddsd.dwHeight,
hDCImage, dwBMPOriginX, dwBMPOriginY,
dwBMPWidth, dwBMPHeight, SRCCOPY );
if( FAILED( hr = m_pdds->ReleaseDC( hDC ) ) )
return hr;
DeleteDC( hDCImage );
return S_OK;
}
...
//-----------------------------------------------------------------------------
// Name: CDisplay::ShowBitmap()
// Desc: Create a bitmap surface and show it via Present method
//-----------------------------------------------------------------------------
HRESULT CDisplay::ShowBitmap( HBITMAP hbm, LPDIRECTDRAWPALETTE pPalette )
{
if( NULL == m_pddsFrontBuffer || NULL == m_pddsBackBuffer )
return E_POINTER;
// Set the palette before loading the bitmap
if( pPalette )
m_pddsFrontBuffer->SetPalette( pPalette );
CSurface backBuffer;
backBuffer.Create( m_pddsBackBuffer );
if( FAILED( backBuffer.DrawBitmap( hbm, 0, 0, 0, 0 ) ) )
return E_FAIL;
return Present();
}Top
2 楼DarthVader（mm咋就那么白呢 唉 还是当黑炭吧）回复于 2003-06-03 15:01:19 得分 0
CSurface是一个SDK里面的类
呵呵Top
