怎么使loadimage载入的位图.....

[运动健将]

怎么使用loadimage函数把位图载入到页面里面

[chunhai12]

DX SDK Utility 中就有

extern "C" IDirectDrawSurface7 * DDLoadBitmap(IDirectDraw7 *pdd, LPCSTR szBitmap, int dx, int dy)
{
HBITMAP hbm;
BITMAP bm;
DDSURFACEDESC2 ddsd;
IDirectDrawSurface7 *pdds;

//
// try to load the bitmap as a resource, if that fails, try it as a file
//
hbm = (HBITMAP)LoadImage(GetModuleHandle(NULL), szBitmap, IMAGE_BITMAP, dx, dy, LR_CREATEDIBSECTION);

if (hbm == NULL)
hbm = (HBITMAP)LoadImage(NULL, szBitmap, IMAGE_BITMAP, dx, dy, LR_LOADFROMFILE|LR_CREATEDIBSECTION);

if (hbm == NULL)
return NULL;

//
// get size of the bitmap
//
GetObject(hbm, sizeof(bm), &bm); // get size of bitmap

//
// create a DirectDrawSurface for this bitmap
//
ZeroMemory(&ddsd, sizeof(ddsd));
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT |DDSD_WIDTH;
ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
ddsd.dwWidth = bm.bmWidth;
ddsd.dwHeight = bm.bmHeight;

if (pdd->CreateSurface(&ddsd, &pdds, NULL) != DD_OK)
return NULL;

DDCopyBitmap(pdds, hbm, 0, 0, 0, 0);

DeleteObject(hbm);

return pdds;
}

/*
* DDCopyBitmap
*
* draw a bitmap into a DirectDrawSurface
*
*/
extern "C" HRESULT DDCopyBitmap(IDirectDrawSurface7 *pdds, HBITMAP hbm, int x, int y, int dx, int dy)
{
HDC hdcImage;
HDC hdc;
BITMAP bm;
DDSURFACEDESC2 ddsd;
HRESULT hr;

if (hbm == NULL || pdds == NULL)
return E_FAIL;

//
// make sure this surface is restored.
//
pdds->Restore();

//
// select bitmap into a memoryDC so we can use it.
//
hdcImage = CreateCompatibleDC(NULL);
if (!hdcImage)
OutputDebugString("createcompatible dc failed\n");
SelectObject(hdcImage, hbm);

//
// get size of the bitmap
//
GetObject(hbm, sizeof(bm), &bm); // get size of bitmap
dx = dx == 0 ? bm.bmWidth : dx; // use the passed size, unless zero
dy = dy == 0 ? bm.bmHeight : dy;

//
// get size of surface.
//
ddsd.dwSize = sizeof(ddsd);
ddsd.dwFlags = DDSD_HEIGHT | DDSD_WIDTH;
pdds->GetSurfaceDesc(&ddsd);

if ((hr = pdds->GetDC(&hdc)) == DD_OK)
{
StretchBlt(hdc, 0, 0, ddsd.dwWidth, ddsd.dwHeight, hdcImage, x, y, dx, dy, SRCCOPY);
pdds->ReleaseDC(hdc);
}

DeleteDC(hdcImage);

return hr;
}

[TaiJi1985]

up