求助 ，图片显示的问题

gigikouyi

通过下面的方法将图片加到一个页面，然后将其bltfast到主页面，为什么不行啊？
HDC hdcSf;
        HBITMAP hbmp;
        LPDIRECTDRAWSURFACE7 lpTmpSurf;

        //=====Load Bitmap Picture=====
        hbmp = (HBITMAP)LoadImage(NULL,p_BMPName,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
        if (!hbmp)
                // failed to load, return failure to caller
                return NULL;

        //=====Create Temp DirectdrawSurface=====
    DDSURFACEDESC2 ddsd;
    //set memory zero
        memset(&ddsd, 0, sizeof(DDSURFACEDESC2));
        //surface descriptor
        ddsd.dwSize = sizeof( ddsd );
        ddsd.dwFlags = DDSD_CAPS|DDSD_WIDTH|DDSD_HEIGHT;
        ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN; //offscreen surface
        ddsd.dwHeight=p_width;
        ddsd.dwWidth=p_height;
        if ( DD_OK != lpDD->CreateSurface( &ddsd, &(lpTmpSurf), NULL ))
        {
            SAFE_RELEASE(lpTmpSurf);
                return NULL; //create offscreen surface
        }
       
        //=====Create the DC=====
    lpTmpSurf->GetDC(&hdcSf);
           //Create a compatible DC
        HDC bitmap_dc=CreateCompatibleDC(hdcSf);
       
        HBITMAP oldbmp=(HBITMAP)::SelectObject(bitmap_dc,hbmp);
        ::BitBlt(hdcSf,0,0,p_width,p_height,bitmap_dc,0,0,SRCCOPY);

        //Release all DC
         if(oldbmp)
        ::SelectObject(bitmap_dc,oldbmp);
         :eleteDC(bitmap_dc);
        lpTmpSurf->ReleaseDC(hdcSf);

        return lpTmpSurf;

SoMan

路过的人啊~~~~~~~~~~~~~~~

hays2002

我只知道不行，，，，，，别问我为什么不行。。。。

godzwj

hbmp = :HBITMAP)LoadImage(NULL,p_BMPName,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
LoadImage是api函数。要加::
你下面建成的是后台页面，不能在屏幕显示的。ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN; //offscreen surface从这一句可以看出。

主页面是不用设定ddsd.dwHeight=p_width;
ddsd.dwWidth=p_height;

gigikouyi

这是个分函数，就是创建一个离屏的页面，把图片画上，然后在把这个页面复制到主页面，为什么也不行啊。

swqzxcvasd

我觉得结构没什么错误  可能具体的函数错了把       一般都是先建立一个主页  之后后页
图片复制到后页  后页传输到主页显示  
如果你要API的我有  不过DXDRAW的 没有   只有前后页的

fromhell

我把我自己写的一个完整的图象显示程序给你吧。我没用bltfast，而是自己写的copy函数。（效果比blt好多了）自己建个工程加进去，再把你要显示的两张图放在同一目录下（一张叫“yuna.bmp",一张叫"rikku.bmp")。（alpha是半透明函数）
#include<windows.h>
#include<ddraw.h>
HWND hwnd;
LPDIRECTDRAW7 IpDD;
LPDIRECTDRAWSURFACE7 IpDDSPrimary;
LPDIRECTDRAWSURFACE7 IpDDSBuffer;
LPDIRECTDRAWSURFACE7 IpDDSBack[2];
DDSURFACEDESC2 ddsd,ddsd_src,ddsd_dest;
HBITMAP bitmap;
HDC hdc1,hdc;
int i;
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);
bool LoadPicture(char *PictureName,int i);
bool initwindow(char *windowname,HINSTANCE hinstance,int windowmodw);
bool initddraw();
void Copy(LPDIRECTDRAWSURFACE7 lPrimary,LPDIRECTDRAWSURFACE7 lPbuffer);
void CALLBACK Go(HWND hwnd,UINT uMsg,UINT iDevent,DWORD dwTime);
void Alpha();
int PASCAL WinMain(HINSTANCE hinstance,HINSTANCE hPrevhinstance,LPSTR lpCmdLine,int windowmode){
        if(!initwindow("ExpForCopy",hinstance,windowmode)||!initddraw()){
                MessageBox(hwnd,"MyFish","There must be something wrong!",MB_OK);
                return false;
        }
        if(!LoadPicture("rikku.bmp",0))return false;
        if(!LoadPicture("yuna.bmp",1))return false;
        SetTimer(hwnd,0,500,Go);
        MSG msg;       
    for(;;){
       
                if(PeekMessage(&msg,NULL,0,0,PM_REMOVE)){
                        if(msg.message==WM_QUIT){
                                MessageBox(hwnd,"Let's us get out of this window","gogogo",MB_OK);
                                break;
                        }
                        TranslateMessage(&msg);
                        DispatchMessage(&msg);
                }
        }
        return msg.lParam;
}
bool initwindow(char *windowname,HINSTANCE hinstance,int windowmode){
        WNDCLASSEX win;
        win.cbSize=sizeof(WNDCLASSEX);
        win.style=CS_HREDRAW|CS_VREDRAW;
        win.lpfnWndProc=(WNDPROC)WinProc;
        win.cbClsExtra=0;
        win.cbWndExtra=0;
        win.hInstance=hinstance;
        win.hIcon=NULL;
        win.hCursor=NULL;
        win.hbrBackground=CreateSolidBrush(RGB(255,255,255));
        win.lpszMenuName=NULL;
        win.lpszClassName=windowname;
        win.hIconSm=NULL;
        RegisterClassEx(&win);
        hwnd=CreateWindow(windowname,windowname,WS_POPUP|WS_MAXIMIZE,CW_USEDEFAULT,0,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN),NULL,NULL,hinstance,NULL);
        if(!hwnd)return false;
        ShowWindow(hwnd,windowmode);
        UpdateWindow(hwnd);
        return true;
}
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam){
        switch(message){
        case WM_KEYDOWN:
                switch(wParam){
                case VK_ESCAPE:
                        KillTimer(hwnd,0);
                        PostMessage(hwnd,WM_CLOSE,0,0);
                        break;
                }
                return 0;
        case WM_DESTROY:
                PostQuitMessage(0);
                return 0;
        }
        return DefWindowProc(hwnd,message,wParam,lParam);
}
bool initddraw(){
        if(DirectDrawCreateEx(NULL,(void**)&IpDD,IID_IDirectDraw7,NULL)!=DD_OK)return false;
        if(IpDD->SetCooperativeLevel(hwnd,DDSCL_EXCLUSIVE|DDSCL_FULLSCREEN|DDSCL_NOWINDOWCHANGES|DDSCL_ALLOWREBOOT)!=DD_OK)return false;
        if(IpDD->SetDisplayMode(1024,768,32,0,DDSDM_STANDARDVGAMODE)!=DD_OK)return false;
        memset(&ddsd,0,sizeof(DDSURFACEDESC2));
        ddsd.dwSize=sizeof(ddsd);
        ddsd.dwFlags=DDSD_CAPS;
        ddsd.ddsCaps.dwCaps=DDSCAPS_PRIMARYSURFACE;
        if(IpDD->CreateSurface(&ddsd,&IpDDSPrimary,NULL)!=DD_OK)return false;
        ddsd.dwFlags=DDSD_CAPS|DDSD_WIDTH|DDSD_HEIGHT;
        ddsd.ddsCaps.dwCaps=DDSCAPS_OFFSCREENPLAIN|DDSCAPS_SYSTEMMEMORY;
        ddsd.dwHeight=768;
        ddsd.dwWidth=1024;
        if(IpDD->CreateSurface(&ddsd,&IpDDSBuffer,NULL)!=DD_OK)return false;
        for(int i=0;i<2;i++)if(IpDD->CreateSurface(&ddsd,&IpDDSBack,NULL)!=DD_OK)return false;
        hdc=::CreateCompatibleDC(NULL);  
        return true;
}
bool LoadPicture(char *PictureName,int i){
        bitmap=(HBITMAP):oadImage(NULL,PictureName,IMAGE_BITMAP,1024,768,LR_LOADFROMFILE);
        ::SelectObject(hdc,bitmap);
        if(IpDDSBack->GetSurfaceDesc(&ddsd)!=DD_OK)return false;
        if(IpDDSBack->GetDC(&hdc1)!=DD_OK)return false;
        ::BitBlt(hdc1,0,0,ddsd.dwWidth,ddsd.dwHeight,hdc,0,0,SRCCOPY);
        IpDDSBack->ReleaseDC(hdc1);
        return true;
}
void Copy(LPDIRECTDRAWSURFACE7 lPrimary,LPDIRECTDRAWSURFACE7 lPbuffer){
        ZeroMemory(&ddsd_src,sizeof(ddsd_src));
        ddsd_src.dwSize=sizeof(ddsd_src);
        ZeroMemory(&ddsd_dest,sizeof(ddsd_dest));
        ddsd_dest.dwSize=sizeof(ddsd_dest);
        lPrimary->Lock(NULL,&ddsd_src,DDLOCK_WAIT,NULL);
        lPbuffer->Lock(NULL,&ddsd_dest,DDLOCK_WAIT,NULL);
        BYTE *lPsrc=(BYTE*)ddsd_src.lpSurface;
        BYTE *lPdest=(BYTE*)ddsd_dest.lpSurface;
        for(int y=0;y<768;y++){
                memcpy(lPsrc,lPdest,4096);
                lPsrc+=ddsd_src.lPitch;
                lPdest+=ddsd_dest.lPitch;
        }
        lPrimary->Unlock(NULL);
        lPbuffer->Unlock(NULL);
}
void CALLBACK Go(HWND hwnd,UINT uMsg,UINT iDevent,DWORD dwTime){
        /*Copy(IpDDSBuffer,IpDDSBack[PictureNumber]);
        if(PictureNumber==0)PictureNumber++;
        else PictureNumber--;
        Copy(IpDDSPrimary,IpDDSBuffer);*/
        Alpha();
        Copy(IpDDSPrimary,IpDDSBuffer);
        i++;
}
void Alpha(){
        Copy(IpDDSBuffer,IpDDSBack[0]);
        ZeroMemory(&ddsd_src,sizeof(ddsd_src));
        ddsd_src.dwSize=sizeof(ddsd_src);
        ZeroMemory(&ddsd_dest,sizeof(ddsd_dest));
        ddsd_dest.dwSize=sizeof(ddsd_dest);
        IpDDSBuffer->Lock(NULL,&ddsd_src,DDLOCK_WAIT,NULL);
        IpDDSBack[1]->Lock(NULL,&ddsd_dest,DDLOCK_WAIT,NULL);            
    _int64 mask=0x7f7f7f7f7f7f7f7f;
        _asm{
                mov eax,ddsd_src.lpSurface
                mov ebx,ddsd_dest.lpSurface
                mov edi,768
FirstLoop:
                push eax
                push ebx
                mov esi,512
SecondLoop:
                movq mm0,[eax]
                movq mm1,[ebx]
                psrlw mm0, 1
                pand mm0, mask
                paddusb mm0,mm1
                movq [eax],mm0
                add eax,8
                add ebx,8
                dec esi
                jnz SecondLoop
                pop ebx
        pop eax
                add eax,ddsd_src.lPitch
                add ebx,ddsd_dest.lPitch
                dec edi
                jnz FirstLoop
                emms
        }
        IpDDSBuffer->Unlock(NULL);
        IpDDSBack[1]->Unlock(NULL);
}
               

swqzxcvasd

大哥你WINMAIN  写的怎么这么乱还好意思拿出来啊    就你这个实用吗