使用 ttf 显示循环中的文本

Question

我想使用 ttf 显示矢量中的文本。到目前为止我的代码：

SDL_Surface * Csurface::onLoadText(const char* text, TTF_Font* font, SDL_Color text_color) {
    OutputDebugString("Csurface.cpp onLoadText called\n");
    SDL_Surface *surf_return = NULL;

    surf_return = TTF_RenderText_Solid(font, text, text_color);

    if (surf_return == NULL) {
        return false;
    }else {
        return surf_return;
    }
}

我在这里尝试从矢量渲染文本：

else if (display_list_incredients) {
    Csurface::OnDraw(surf_display, surf_list_incredients, 0, 0);
    Csurface::OnDraw(surf_list_incredients, surf_budget, SCREEN_WIDTH / 100 * 1, SCREEN_HEIGHT / 100 * 2);
    Csurface::OnDraw(surf_budget, surf_text_budget, 20, 80);

    I_GameLogic i_game_logic;
    int y = SCREEN_HEIGHT / 100 *25;
    int i_max = v_incredients.size();
    for (int i = 0; i < i_max; i++) {
        Csurface::OnDraw(surf_list_incredients, surf_button_buy, SCREEN_WIDTH / 100 * 5, y);
        std::string text_incredient = i_game_logic.get_text_incredient(v_incredients[i]);
        OutputDebugString(text_incredient.c_str());
        surf_text_incredient = Csurface::onLoadText(text_incredient.c_str(), font, text_color);
        Csurface::OnDraw(surf_button_buy, surf_text_incredient, 0,0);
        y+= SCREEN_HEIGHT / 100 * 5;
    }

}

在文本表面中，所有单个成分似乎都在彼此之上呈现。

bool Csurface::OnDraw(SDL_Surface* Surf_Dest, SDL_Surface* Surf_Src, int X, int Y) {

    if (Surf_Dest == NULL || Surf_Src == NULL) {
        return false;
    }

    SDL_Rect DestR;

    DestR.x = X;
    DestR.y = Y;

    SDL_BlitSurface(Surf_Src, NULL, Surf_Dest, &DestR);

    return true;
}

Answer 1

我发现了我的错误，我在每个按钮字段的每个循环中绘制文本。我现在将文本渲染到背景中，这很有效。

    Csurface::OnDraw(surf_list_incredients, surf_button_buy, x_buttons, y);
    std::string text_incredient = i_game_logic.get_text_incredient(v_incredients[i]);
    surf_text_incredient = Csurface::onLoadText(text_incredient.c_str(), font, text_color);
    Csurface::OnDraw(surf_list_incredients, surf_text_incredient, x_text, y);
    y+= SCREEN_HEIGHT / 100 * 7;

使用 ttf 显示循环中的文本

Displaying text from a loop using ttf

c++

sdl-ttf