#include <ddraw.h>
#pragma comment(lib, "ddraw.lib")
//画一个要掉下来的动态页面之前把loop设为TRUE
BOOL loop = TRUE;
static LPDIRECTDRAW lpDD = NULL;
static LPDIRECTDRAWCLIPPER lpClipper = NULL;
static LPDIRECTDRAWSURFACE lpBmpSurface = NULL;
static LPDIRECTDRAWSURFACE lpPrimarySurface = NULL;
//初始化Direct Draw
void CBluetoothDlg::InitializeDirectDraw()
{
HRESULT hRes;
DDSURFACEDESC ddDesc;
if ( lpDD != NULL )
return;
hRes = DirectDrawCreate( NULL, &lpDD, NULL );
if ( hRes != DD_OK )
return;
hRes = lpDD->SetCooperativeLevel(NULL, DDSCL_NORMAL);
if ( hRes != DD_OK )
return;
hRes = lpDD->CreateClipper(0, &lpClipper, NULL);
if ( hRes != DD_OK )
return;
ZeroMemory(&ddDesc, sizeof(ddDesc));
ddDesc.dwSize = sizeof(ddDesc);
ddDesc.dwFlags = DDSD_CAPS;
ddDesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
hRes = lpDD->CreateSurface(&ddDesc, &lpPrimarySurface, NULL);
if ( hRes != DD_OK )
return;
lpPrimarySurface->SetClipper(lpClipper);
lpClipper->SetHWnd(0, m_hWnd);
}
//加载页面(页面图像改变时调用)
BOOL CBluetoothDlg::LoadPicture()
{
BOOL bRet = FALSE;
HDC hdc = NULL;
DDSURFACEDESC ddsDesc;
if ( lpDD == NULL )
return bRet;
if ( lpBmpSurface != NULL )
{
lpBmpSurface->Release();
lpBmpSurface = NULL;
}
ZeroMemory(&ddsDesc, sizeof(ddsDesc));
ddsDesc.dwSize = sizeof(DDSURFACEDESC);
ddsDesc.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;
ddsDesc.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | DDSCAPS_SYSTEMMEMORY;
ddsDesc.dwWidth = 480;
ddsDesc.dwHeight = 272;
if ( lpDD->CreateSurface(&ddsDesc, &lpBmpSurface, NULL) != DD_OK )
{
return bRet;
}
lpBmpSurface->GetDC(&hdc);
if(Page[CPage::stackPage.GetTop()].Draw(hdc))
bRet = TRUE;
lpBmpSurface->ReleaseDC(hdc);
return bRet;
}
//显示页面
void CBluetoothDlg::ShowPicture()
{
if ( lpPrimarySurface == NULL )
return;
if ( lpBmpSurface == NULL )
return;
// if there is a screensaver, when resume from it,
// the surface will lost, then the program should restore the surface
if ( lpBmpSurface->IsLost() == DDERR_SURFACELOST )
{
if ( lpBmpSurface->Restore() != DD_OK )
return;
}
if ( lpPrimarySurface->IsLost() == DDERR_SURFACELOST )
{
if ( lpPrimarySurface->Restore() != DD_OK )
return;
}
if(loop)
{
RECT rect = {0,0,480,0};
RECT rect2 = {0,272,480,272};
for(int i=0;i<68;i++)
{
rect.bottom+=4;
rect2.top-=4;
lpPrimarySurface->Blt(&rect, lpBmpSurface, &rect2, DDBLT_WAIT, NULL);
}
loop = FALSE;
}
else
{
lpPrimarySurface->Blt(NULL, lpBmpSurface, NULL, DDBLT_WAIT, NULL);
}
}
//释放
void CBluetoothDlg::InvalidateDirectDraw()
{
if ( lpPrimarySurface != NULL )
{
lpPrimarySurface->Release();
lpPrimarySurface = NULL;
}
if ( lpClipper != NULL)
{
lpClipper->Release();
lpClipper = NULL;
}
if ( lpBmpSurface != NULL )
{
lpBmpSurface->Release();
lpBmpSurface = NULL;
}
if ( lpDD != NULL )
{
lpDD->Release();
lpDD = NULL;
}
}
WinCE使用DirectDraw实现页面下掉的特效
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转载自blog.csdn.net/llxxhm/article/details/81905244
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