Topics

1

General / (Solved) Read access violation with unknown reason

« on: April 18, 2020, 01:41:20 am »

Hello! I am getting read access violation while running game code, here is a minimal example:
https://pastebin.com/cEqKDaGk
It is designed to render some sprites to the RenderTexture and then render it to the window.
Exception occures on any line of Menu::DrawMenu().

(click to show/hide)

Code seems to work OK if I am not using vectors for storing Menu class.
C++ 17, SFML 2.5.1, VS 2019

2

Graphics / Access violation when declaring Texture object

« on: May 06, 2018, 06:19:40 pm »

Hello, I have strange problem while trying to declare Texture object inside class.
What I have:

(click to show/hide)

class main_menu {
        public:
                void initialization() {
                        t_main_menu_background.loadFromFile("external resources/artassets/menu/backgrounds/main_menu_background.jpg");
                        main_menu_background.setTexture(t_main_menu_background);
                        main_menu_background.setPosition(0, 0);
                        main_menu_background = system_global_environment.set_scale_of_sprite_based_on_window_size(main_menu_background);
                        menu_loading_screen.f_welcome_to_loading.loadFromFile("external resources/artassets/menu/sprites/loading_screen_text_eng.png");
                        f_main_logo.loadFromFile("external resources/artassets/menu/sprites/logo_with_icon_eng.png");
                        menu_loading_screen.t_welcome_to_loading.loadFromImage(menu_loading_screen.f_welcome_to_loading);
                        t_main_logo.loadFromImage(f_main_logo);
                        menu_loading_screen.welcome_to.setTexture(menu_loading_screen.t_welcome_to_loading);
                        menu_loading_screen.loading.setTexture(menu_loading_screen.t_welcome_to_loading);
                        main_logo.setTexture(t_main_logo);
                        menu_loading_screen.welcome_to.setTextureRect(IntRect(0, 0, 500, 125));
                        menu_loading_screen.loading.setTextureRect(IntRect(0, 125, 500, 250));
                        //menu_loading_screen.loading = system_global_environment.set_scale_of_sprite_based_on_window_size(menu_loading_screen.loading);
                        //menu_loading_screen.welcome_to = system_global_environment.set_scale_of_sprite_based_on_window_size(menu_loading_screen.welcome_to);
                        main_logo = system_global_environment.set_scale_of_sprite_based_on_window_size(main_logo);
                        menu_loading_screen.phase = 1;
                        menu_loading_screen.transparency = 0;
                        CurrentMenu = 1;
                        PreviousMenu = 0;
                }
                void draw_menu() {
                        switch (CurrentMenu) {
                        case 1:
                                        switch (menu_loading_screen.phase) {
                                        case 1:

                                                menu_loading_screen.transparency = menu_loading_screen.transparency + 1;
                                        break;
                                        }
                                        system_global_environment.get_p_window()->draw(main_menu_background);
                                        system_global_environment.get_p_window()->draw(main_logo);
                                        system_global_environment.get_p_window()->draw(menu_loading_screen.loading);
                                        system_global_environment.get_p_window()->draw(menu_loading_screen.welcome_to);
                        break;
                        case 2:
                        break;
                        }
                }
        private:
                int CurrentMenu,PreviousMenu;
                Image f_main_logo;
                Texture t_main_logo;
                Texture t_main_menu_background;
                Sprite main_menu_background;
                Sprite main_logo;
                struct loading_screen {
                        Image f_welcome_to_loading;
                        Texture t_welcome_to_loading;
                        Sprite welcome_to;
                        Sprite loading;
                        int phase;
                        int transparency;
                } menu_loading_screen;

} system_main_menu;

That supposed to be a menu class that declaring images, textures and sprites for menu and draws it, and i have "Unhandled exception at 0x779522E2 (ntdll.dll) in Project137.exe: 0xC0000005: Access violation writing location 0x00000004." on the line where system_main_menu object is being declared.
Problem solves only if I will remove that 3 lines with declaring textures: Texture t_main_logo, Texture t_main_menu_background and Texture t_welcome_to_loading and usage of them.
For example this code won't work:

(click to show/hide)

class main_menu {
        public:
        private:
                Texture t_main_logo;
                Texture t_main_menu_background;
                Texture t_welcome_to_loading;
} system_main_menu;

It works if I declare texture outside class (in main() for example) but still doesnt work if I declare them in any other class.
Strange thing is that code worked fine until I started to use cout to get some variables values, then that error appeared, and when I used ctrl+z to undo code I wrote that problem didn't disappear. I'm not sure if this problem connected to SFML itself (probably my software problem) but I googled that problem I have and found out they all have very different reasons. Sorry if provided not enough info about problem, feel free to ask for more.
I use SFML 2.4.2 x32 in VS 2017, precompiled build by Nightlybuilds (here).