SDL2 TTF“释放内存”，但实际上不是“释放内存”

如何解决SDL2 TTF“释放内存”，但实际上不是“释放内存”

我正在尝试在SDL2 TTF中编辑文本，并且我发现在添加/减去文本时，内存没有减少。问题可能出在SDL_DestroyTexture和SDL_FreeSurface中，但它也带来了加载字体的问题。我拥有文本的方式是在文本的第一个实例之后，我加载了所需的字体。然后，当最后一个实例为“免费”时，我关闭字体。这是它的代码（Individual_Characters是我的文本课，基本上是它们的数组）

加载纹理


void Individual_Characters::Load_Character_Texture(SDL_Renderer *renderer)
{
    if (characterTexture != NULL){
        SDL_DestroyTexture(characterTexture);
        characterTexture = NULL;
    }



    if (character != "")
    {


        SDL_Surface *characterSurface = NULL;


        if (bold == true){
            characterSurface = TTF_RenderText_Blended(fontsBold[fontIndex],character.c_str(),characterColour);
        }

        if (bold == false){
            characterSurface = TTF_RenderText_Blended(fonts[fontIndex],characterColour);
        }



        if (!characterSurface){
            std::cout << "Could not create surface " << SDL_GetError() << std::endl;
        }

        else{
            characterTexture = SDL_CreateTextureFromSurface(renderer,characterSurface);
            SDL_FreeSurface(characterSurface);
            characterSurface = NULL;
        }


        SDL_QueryTexture(characterTexture,NULL,&characterRect.w,&characterRect.h);


    }

    else {

        characterRect.w = 0;
        characterRect.h = 0;

    }




}

设置单个字符

void Individual_Characters::Setup(SDL_Renderer *renderer,std::string p_character,int p_x,int p_y,int p_characterSize,SDL_Colour p_colour,bool p_bold,bool p_clickable,std::string p_fontType)
{
    if (setup == false){


        characterRect.x = p_x;
        characterRect.y = p_y;

        character = p_character;
        characterFont = p_fontType;
        characterSize = p_characterSize;
        characterColour = p_colour;
        clickable = p_clickable;
        bold = p_bold;


        fontIndex = characterSize - lowestFontSize -1;


        numOfInstances += 1;

        if (numOfInstances == 1){

            std::cout << "Character instance where initialising fonts  " << character << std::endl;

            TTF_Init();

            fonts.reserve(highestFontSize-lowestFontSize+1);
            fontsBold.reserve(highestFontSize-lowestFontSize+1);

            for (int i=lowestFontSize; i <= highestFontSize; i++)
            {
                TTF_Font *currentFont = TTF_OpenFont(characterFont.c_str(),i);

                TTF_Font *currentFontBold = TTF_OpenFont(characterFont.c_str(),i);
                TTF_SetFontStyle(currentFontBold,TTF_STYLE_BOLD);

                fonts.push_back(currentFont);
                fontsBold.push_back(currentFontBold);

            }

        }



        Load_Character_Texture(renderer);



    }



    setup = true;

}

，然后当我“退格”时，我首先称其为，然后在Individual_Characters之后弹出我的向量。



void Individual_Characters::Free_All()
{

    if (setup == true){



        if (characterTexture != NULL){
            SDL_DestroyTexture(characterTexture);
        }



        if (numOfInstances == 1){

            std::cout << "Character instance where closing fonts  " << character << std::endl;

            for (int i=0; i < fonts.size(); i++){
                TTF_CloseFont(fonts[i]);
                TTF_CloseFont(fontsBold[i]);
            }

            fonts.clear();
            fontsBold.clear();

            TTF_Quit();

        }


        numOfInstances -= 1;


    }


    setup = false;


}

numOfInstances是我拥有Individual_Characters的多少个实例，当我删除所有现有文本时，输出使我知道字体实际上是封闭的。无论如何。在加载文本之前，程序将位于30mb ram左右，而字体将加载70mb ram。很好，但是由于程序使用TTF_CloseFont()，因此即使释放后内存仍保持70mb。

SDL2 TTF“释放内存”，但实际上不是“释放内存”

如何解决SDL2 TTF“释放内存”，但实际上不是“释放内存”

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