遊戲運行幾分鐘後，SDL_Surface會消失嗎？

運行我的小行星遊戲幾分鐘後，代表我的船的SDL_Surface消失。不知怎的，保存船的旋轉圖像（腐蝕）的表面被設置爲NULL。我無法弄清楚爲什麼！在我添加行if(rot != NULL && image != NULL)之前，程序在運行約三十秒後會崩潰，但現在圖像就消失了。我似乎無法弄清楚什麼是錯的！提前致謝！遊戲運行幾分鐘後，SDL_Surface會消失嗎？

Sprite類涉及旋轉和渲染的函數。

void Sprite::Rotate(double angleAdd) 
{ 
    rotated = true; 
    double temp = 0; 
    angle += angleAdd; 
    temp = angleAdd + angle; 
    if (temp >= 360) 
     angleAdd = temp - 360; 
    if (temp <= 360) 
     angleAdd = temp + 360; 

    rot = rotozoomSurface(image, angle , 1.0, 1); 
} 

void Sprite::Draw(SDL_Surface* screen) 
{ 
    if(image == NULL) 
     SDL_FillRect(screen, &rect, color); 
    else 
    { 
     if (rotated) 
     { 
      rotRect.x = x; 
      rotRect.y = y; 
      //Center the image 
      if(rot != NULL && image != NULL){ 
       rotRect.x -= ((rot->w/2) - (image->w/2)); 
       rotRect.y -= ((rot->h/2) - (image->h/2)); 
      } 
      SDL_BlitSurface(rot, NULL, screen, &rotRect); 
     } 
     else 
      SDL_BlitSurface(image, NULL, screen, &rect); 
    } 
} 

bool Sprite::SetImage(std::string fileName) 
{ 
    imageFileName = fileName; 
    SDL_Surface* loadedImage = NULL; 
    loadedImage = SDL_LoadBMP(fileName.c_str()); 
    if(loadedImage == NULL) 
    { 
     if (debugEnabled) 
      printf("Failed to load image: %s\n", fileName.c_str()); 
      SDL_FreeSurface(loadedImage); 
     return false; 
    } 
    else 
    { 
     image = SDL_DisplayFormat(loadedImage); 

     SDL_FreeSurface(loadedImage); 
     return true; 
    } 

}

主營：

if (arrowPressed[0]) 
    { 
     ship.SetImage(shipFor.GetImage()); 
     if(!phase) 
      ship.Accel(-moveSpeed); 
     else 
      ship.Accel(-moveSpeed * 2); 
    } 
    if (arrowPressed[1]) 
    { 
     ship.Rotate(turnSpeed); 
     ship.SetImage(shipRig.GetImage()); 
    } 
    if (arrowPressed[3]) 
    { 
     ship.Rotate(-turnSpeed); 
     ship.SetImage(shipLef.GetImage()); 
    } 

    if (arrowPressed[0] && arrowPressed[1]) 
     ship.SetImage(shipForRig.GetImage()); 
    if (arrowPressed[0] && arrowPressed[3]) 
     ship.SetImage(shipForLef.GetImage()); 
    if (!arrowPressed[0] && !arrowPressed[1] && !arrowPressed[3]) 
     ship.SetImage(shipNor.GetImage()); 

    if (ship.GetCenterX() >= RESX - 40) 
     ship.SetPosCentered(50, ship.GetCenterY()); 
    if (ship.GetCenterX() <= 40) 
     ship.SetPosCentered(RESX - 50, ship.GetCenterY()); 
    if (ship.GetCenterY() >= RESY - 40) 
     ship.SetPosCentered(ship.GetCenterX(), 50); 
    if (ship.GetCenterY() <= 40) 
     ship.SetPosCentered(ship.GetCenterX(), RESY - 150);

來源

2013-03-31 Graztok

程序使用多少內存？我懷疑這是內存泄漏。 –

看來，你是不是釋放最後的旋轉圖像。檢查是否爲null，並在創建新表面之前釋放表面：

void Sprite::Rotate(double angleAdd) 
{ 
    if(rot != NULL) 
     SDL_FreeSurface(rot); 

    rotated = true; 
    double temp = 0; 
    angle += angleAdd; 
    temp = angleAdd + angle; 
    if (temp >= 360) 
     angleAdd = temp - 360; 
    if (temp <= 360) 
     angleAdd = temp + 360; 

    rot = rotozoomSurface(image, angle , 1.0, 1); 
}

來源

2013-03-31 09:57:37

謝謝！我會試試這個！ – Graztok

遊戲運行幾分鐘後，SDL_Surface會消失嗎？

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