使用SDL2纹理时内存泄漏

Question

我正在制作使用SDL_TTF和SDL_Image的游戏。我有一个名为browseinventory的函数，它允许您在将鼠标悬停在项目上时检查项目的统计信息。发生内存泄漏的地方。一旦你徘徊在一个项目槽上，程序就会检查所述槽中是否有任何内容，如果有，则Text类对象设置了项目的参数然后再渲染。
我很确定错误在Text类中，因为一旦我在一个项目上盘旋，内存使用量会迅速增加。

Text课程：

class Text
{
public:
    Text() {w = 0; h = 0; saying = ""; Textthing = NULL;}
    ~Text(){destroy();}
    void destroy(){SDL_DestroyTexture(Textthing); Textthing = 0; saying = "", w = 0, h = 0;}
    void render(int, int, int, SDL_Renderer*);
void settext(string, SDL_Color);
void rendertest(int, int, SDL_Renderer*);
int rows;

private:
    string saying;
    SDL_Texture *Textthing;
    int w, h;
    unsigned int flag1 = 0, flag2, loops = 0;
    string saying1;
    unsigned int counter;
    bool spaceflag = 0;
};  

render() ：

void Text::render(int x, int y, int maxchars = 100, SDL_Renderer *Temp = Saviour)
{
    rows = 0;
    flag1 = 0, flag2 = maxchars, loops = 0;
    int increment = maxchars;
    if (resolution == "800x600")
        {
            flag2 = maxchars*0.8;
            increment = maxchars*0.8;
        }
    spaceflag = 0;
    do
{
    spaceflag = 0;
    for (counter = flag1; counter < flag2 && counter < saying.length(); counter++)
        {
            if (counter > flag2-10 && saying[counter] == ' ')
                {
                    spaceflag = 1;
                    break;
                }
            saying1 += saying[counter];
        }

    asdfgfa1.settext(saying1);
    asdfgfa1.rendertest(x, y + loops*(SCREEN_HEIGHT/19), Temp);
    saying1 = "";
    loops++;
    rows++;
    if (flag2 > saying.length())
        break;
    if (spaceflag == 0)
    {
        flag1 = flag2;
        flag2 += increment;
    }
    else
    {
        flag1 = counter;
        flag2 = counter + increment;
    }
}while (1);
asdfgfa1.destroy();
SDL_DestroyTexture(Textthing);
Textthing = 0;

}

setText() ：

void Text::settext(string stuff, SDL_Color Colour = {255, 255, 255})
{
    saying = stuff;
    SDL_Surface *Surf = TTF_RenderText_Solid(Arial, stuff.c_str(), Colour);
    w = Surf->w;
    h = Surf->h;
    Textthing = SDL_CreateTextureFromSurface(Saviour, Surf);
    SDL_FreeSurface(Surf);
    Surf = 0;
}