Directx Direct X Sprite渲染问题

Directx Direct X Sprite渲染问题,directx,rendering,sprite,Directx,Rendering,Sprite,我一直在使用DirectX编写自己的库,遇到了一个奇怪的问题。在尝试渲染动画精灵时,我只看到一个大的黑色正方形: 我痴迷地浏览了代码,并得出结论,这一定与实际精灵的加载有关,因为我在代码中看到的一切都很好。显然,我无法单步执行BltFast之类的函数,因此无法判断我的精灵曲面是否已成功地Blite到backbuffer上 以下是我的精灵加载和渲染功能: SPRITE::LOAD /** * loads a bitmap file and copies it to a directdraw

我一直在使用DirectX编写自己的库,遇到了一个奇怪的问题。在尝试渲染动画精灵时,我只看到一个大的黑色正方形:

我痴迷地浏览了代码,并得出结论,这一定与实际精灵的加载有关,因为我在代码中看到的一切都很好。显然,我无法单步执行BltFast之类的函数,因此无法判断我的精灵曲面是否已成功地Blite到backbuffer上

以下是我的精灵加载和渲染功能:

SPRITE::LOAD

/**
 *  loads a bitmap file and copies it to a directdraw surface
 *
 *  @param  pID             wait
 *  @param  pFileName       name of the bitmap file to load into memory
 */
void Sprite::Load (const char *pID, const char *pFileName)
{
    //  initialises the member variables with the new image id and file name
    mID                 = pID;
    mFileName           = pFileName;

    //  creates the necessary variables
    HBITMAP             tHBM;
    BITMAP              tBM;
    DDSURFACEDESC2      tDDSD;
    IDirectDrawSurface7 *tDDS;

    //  stores bitmap image into HBITMAP handler
    tHBM                    = static_cast<HBITMAP> (LoadImage (NULL, pFileName, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_CREATEDIBSECTION));

    GetObject (tHBM, sizeof (tBM), &tBM);

    //  create surface for the HBITMAP to be copied onto
    ZeroMemory (&tDDSD, sizeof (tDDSD));
    tDDSD.dwSize            = sizeof (tDDSD);
    tDDSD.dwFlags           = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH;
    tDDSD.ddsCaps.dwCaps    = DDSCAPS_OFFSCREENPLAIN;
    tDDSD.dwWidth           = tBM.bmWidth;
    tDDSD.dwHeight          = tBM.bmHeight;
    DirectDraw::GetInstance ()->DirectDrawObject()->CreateSurface (&tDDSD, &tDDS, NULL);

    //  copying bitmap image onto surface
    CopyBitmap(tDDS, tHBM, 0, 0, 0, 0);

    //  deletes bitmap image now that it has been used
    DeleteObject(tHBM);

    //  stores the new width and height of the image
    mSpriteWidth            = tBM.bmWidth;
    mSpriteHeight           = tBM.bmHeight;

    //  sets the address of the bitmap surface to this temporary surface with the new bitmap image
    mBitmapSurface          = tDDS;
}
/**
*加载位图文件并将其复制到directdraw曲面
*
*@param pID等待
*@param pFileName要加载到内存中的位图文件的名称
*/
void Sprite::Load(常量字符*pID,常量字符*pFileName)
{
//使用新的映像id和文件名初始化成员变量
mID=pID;
mFileName=pFileName;
//创建必要的变量
HBITMAP-tHBM;
位图隧道掘进机;
DDSURFACEDESC2-tDDSD;
IDirectDrawSurface7*tDDS;
//将位图图像存储到HBITMAP处理程序中
tHBM=静态_cast(LoadImage(NULL,pFileName,IMAGE_位图,0,0,LR_LOADFROMFILE | LR_CREATEDIBSECTION));
GetObject(tHBM、sizeof(tBM)和tBM);
//为要复制到的HBITMAP创建曲面
零内存(&tDDSD,sizeof(tDDSD));
tDDSD.dwSize=sizeof(tDDSD);
tDDSD.dwFlags=DDSD_CAPS | DDSD_高度| DDSD_宽度;
tDDSD.ddsCaps.dwCaps=ddsCaps\u OFFSCREENPLAIN;
tDDSD.dwWidth=tBM.bmWidth;
tDDSD.dwHeight=tBM.bmHeight;
DirectDraw::GetInstance()->DirectDrawObject()->CreateSurface(&tDDSD,&tDDS,NULL);
//将位图图像复制到曲面上
复制位图(tDDS、tHBM、0、0、0);
//删除已使用的位图图像
删除对象(tHBM);
//存储图像的新宽度和高度
mSpriteWidth=tBM.bmWidth;
mSpriteHeight=tBM.bmHeight;
//使用新位图图像将位图曲面的地址设置为此临时曲面
MbitMassurface=tDDS;
}
SPRITE::RENDER

/**
 *  renders the sprites surface to the back buffer
 *
 *  @param  pBackBuffer     surface to render the sprite to
 *  @param  pX              x co-ordinate to render to (default is 0)
 *  @param  pY              y co-ordinate to render to (default is 0)
 */
void Sprite::Render (LPDIRECTDRAWSURFACE7 &pBackBuffer, float pX, float pY)
{
    if (mSpriteWidth > 800)     mSpriteWidth = 800;

    RECT            tFrom;

    tFrom.left      = tFrom.top     =   0;
    tFrom.right     = mSpriteWidth;
    tFrom.bottom    = mSpriteHeight;

    //  bltfast parameters are (position x, position y, dd surface, draw rect, wait flag)
    //  pBackBuffer->BltFast (0 + DirectDraw::GetInstance()->ScreenWidth(), 0, mBitmapSurface, &tFrom, DDBLTFAST_WAIT);
    pBackBuffer->BltFast (static_cast<DWORD>(pX + DirectDraw::GetInstance()->ScreenWidth()), 
        static_cast<DWORD>(pY), mBitmapSurface, &tFrom, DDBLTFAST_WAIT);
}
/**
*将精灵曲面渲染到后缓冲区
*
*@param pBackBuffer surface将精灵渲染到
*要渲染到的@param pX x坐标(默认值为0)
*要渲染到的@param pY y坐标(默认值为0)
*/
void Sprite::Render(LPDIRECTDRAWSURFACE7&pBackBuffer、float pX、float pY)
{
如果(mSpriteWidth>800)mSpriteWidth=800;
RECT-tFrom;
tFrom.left=tFrom.top=0;
tFrom.right=mSpriteWidth;
tFrom.bottom=mSpriteHeight;
//bltfast参数为(位置x、位置y、dd曲面、绘制矩形、等待标志)
//pBackBuffer->BltFast(0+DirectDraw::GetInstance()->ScreenWidth(),0,mbitmassurface,&tFrom,DDBLTFAST_WAIT);
pBackBuffer->BltFast(静态转换(pX+DirectDraw::GetInstance()->ScreenWidth()),
静态广播(pY)、MbitMassurface和tFrom、DDBLTFAST\u等待);
}

曲面的格式根本不兼容

下面是我现在在load函数中调用的fixed copybitmap函数:

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);
    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;
}